Crown Com-Tech CT-1600B Service manual

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Com-Tech 1600 Amplifier Service Manual

POWER AMPLIFIER

SERVICE MANUAL

COM-TECH

®

1600

Model CT1600B

©1996 by CROWN INTERNATIONAL, INC.

Mailing Address:

P.O. Box 1000

Elkhart, IN U.S.A. 46515-1000

Shipping Address:

57620 C.R. 105

Elkhart, IN U.S.A. 46517

Com-Tech ® , ODEP ® and Crown ® are registered trademarks of Crown International, Inc.

K-SVCCT1600

1-96

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Com-Tech 1600 Amplifier Service Manual

The information furnished in this manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible situation which may arise during installation, operation or maintenance. If you need special assistance beyond the scope of this manual, please contact the Crown

Technical Support Group.

Mail: P.O. Box 1000 Elkhart IN 46515-1000

Shipping: 57620 C.R. 105 Elkhart IN 46517

Phone: (800) 342-6939/(219) 294-8200

FAX: (219) 294-8301

CAUTION AVIS

TO PREVENT ELECTRIC SHOCK DO

NOT REMOVE TOP OR BOTTOM

COVERS. NO USER SERVICEABLE

PARTS INSIDE. REFER SERVICING

TO QUALIFIED SERVICE

PERSONNEL. DISCONNECT

POWER CORD BEFORE REMOVING

REAR INPUT MODULE TO ACCESS

GAIN SWITCH.

À PRÉVENIR LE CHOC

ÉLECTRIQUE N’ENLEVEZ

PAS LES COUVERTURES.

RIEN DES PARTIES

UTILES À L’INTÉRIEUR.

DÉBRANCHER LA BORNE

AVANT D’OUVRIR LA

MODULE EN ARRIÈRE.

WARNING

TO REDUCE THE RISK OF ELECTRIC

SHOCK, DO NOT EXPOSE THIS

EQUIPMENT TO RAIN OR MOISTURE!

Com-Tech 1600 Amplifier Service Manual

Table of Contents

Introduction ............................................................ 4

Parts Information .................................................... 5

Specifications ......................................................... 6

Theory .................................................................... 7

Electrical Checkout Procedures ........................... 12

Parts List (Non Module) ....................................... 16

Module and Schematic Information ..................... 19

Q42828-6 Control Module Parts List .................... 20

Q43213-0 Control Module Parts List .................... 21

Q43241-1 Control Module Parts List .................... 22

Q42706-4 Display Module Parts List .................... 23

Q42758-5 Output Module Parts List .................... 24

Q42889-8 Output Module Parts List .................... 25

Q42973-0 Output Module Parts List .................... 26

Q43051-4 Output Module Parts List .................... 27

Q43192-6 Output Module Parts List .................... 28

Q42782-5 Main Module Parts List ........................ 29

Q42919-3 Main Module Parts List ........................ 32

Q43010-0 Main Module Parts List ........................ 35

Q43041-5 Main Module Parts List ........................ 38

Q43131-4 Main Module Parts List ........................ 41

Q43240-3 Main Module Parts List ........................ 44

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Com-Tech 1600 Amplifier Service Manual

This manual contains service information on Crown power amplifiers. It is designed to be used in conjunction with the applicable Owner's Manual. However, some important information is duplicated in this Service Manual in case the Owner's Manual is not readily available.

NOTE: THE INFORMATION IN THIS MANUAL IS INTENDED

FOR USE BY AN EXPERIENCED TECHNICIAN ONLY!

Scope

This Service Manual in intended to apply to all versions of the CT-1600B amplifier including the Amcron version. The Parts Listings include parts specific for the

US version and the European version (CT-1600BE13).

For parts specific only to other versions contact the

Crown Technical Support Group for help in finding part numbers.

This Service Manual includes several sections. These sections include Parts Information, Specifications,

Voltage Conversion, Circuit Theory, Electrical Test

Procedures, Non-Module Parts Lists, and Module

Parts Lists. Schematics are attached. Note that component parts with circuit board comprise a complete module. Module part numbers are always associated with a specific circuit board, although an unpopulated

Introduction circuit board may be built up with different parts to create different modules. Note that Crown does not sell blank (unpopulated) circuit boards.

Each of the compact audio power amplifiers are designed for professional or commercial use. Providing high power amplification from 20Hz to 20KHz with minimum distortion, they feature balanced inputs with bridged and parallel monophonic capability. Specific features vary depending on model family.

Warranty

Each Owner's Manual contains basic policies as related to the customer. In addition it should be stated that this service documentation is meant to be used only by properly trained service personnel. Because most Crown products carry a 3 Year Full Warranty

(including round trip shipping within the United States), all warranty service should be referred to the Crown

Factory or Authorized Warranty Service Center. See the applicable Owner’s Manual for warranty details. To find the location of the nearest Authorized Service

Center or obtain instructions for receiving Crown Factory Service please contact the Crown Technical Support Group (within North America) or your Crown/

Amcron Importer (outside North America).

Crown

Technical Support Group

Factory Service

Parts Department

Mailing Address:

PO Box 1000

Elkhart, IN USA 46515-1000

Shipping Address:

57620 C.R. 105

Elkhart, IN USA 46517

Phone: (219) 294-8200

Toll Free: (800) 342-6939

FAX: (219) 294-8301

Com-Tech 1600 Amplifier Service Manual

General Information

Later sections include both mechanical and electrical parts lists for this product. The parts listed are current as of the date printed. Crown reserves the right to modify and improve its products for the benefit of its customers.

Part Numbering System

As of the printing of this manual, Crown is using two numbering systems. The elder system always uses eight characters. The first character is a letter. Common letters used are C, D, H, M, P, and Q. The second through sixth characters are numbers. The numbers build sequentially (for each prefix letter) as new parts are added to our parts inventory system. (In some cases there will be a space then a four character number after the prefix letter; the space is considered a character.) The seventh character is usually a hyphen, though it may be a letter to indicate a revision or special note. The last character is called a check-digit, and is useful to Crown for internal tracking.

Crown is in the process of converting to a new part number system. Length may vary from eight to twelve characters. There is still a letter prefix, then five numbers. These five numbers identify a type of part.

The seventh character is a hyphen. Remaining characters identify the details of the type of part identified by the first part of the number.

Standard and Special Parts

Many smaller electrical and electronic parts used by

Crown are stocked by and available from electronic supply houses. However, some electronic parts that appear to be standard are actually special. A part ordered from Crown will assure an acceptable replacement. Structural items such as modules and panels are available from Crown only.

Ordering Parts

When ordering parts, be sure to give the product model, and include a description and part number

(CPN/DPN) from the parts listing. Price quotes are available on request.

Shipment

Shipment will be normally made by UPS or best other method unless you specify otherwise. Shipments are made to and from Elkhart, Indiana USA, only. Established accounts with Crown will receive shipment freight prepaid and will be billed. All others will receive

Parts Information shipment on a C.O.D. or pre-payment (check or credit card) basis.

Terms

Normal terms are pre-paid. Net-30 Days applies to only those firms having pre-established accounts with

Crown. If pre-paying, the order must be packed and weighed before a total bill can be established, after which an amount due will be issued and shipment made upon receipt of pre-payment. New parts returned for credit are subject to a 10% re-stocking fee, and authorization from the Crown Parts Department must be obtained before returning parts for credit.

Crown is not a general parts warehouse. Parts sold by the Crown Parts Department are solely for servicing

Crown/Amcron products. Part prices and availabil- ity are subject to change without notice.

Crown

Parts Department

Mailing Address:

PO Box 1000

Elkhart, IN USA 46515-1000

Shipping Address:

57620 C.R. 105

Elkhart, IN USA 46517

Phone: (219) 294-8210 or: (219) 294-8211

Toll Free: (800) 342-6939

FAX: (219) 294-8301

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Com-Tech 1600 Amplifier Service Manual

Specifications

Unless noted otherwise, all specifications are based on driving an 8 ohm load per channel, both channels driven, the sensitivity switch in the 26dB position, the

AC supply is 120VAC at 60Hz. Crown specifications are guaranteed through the warranty period (normally

3 years). Because our testing methods are more stringent than our published specifications, every Crown amplifier will exceed its published specifications.

Power

Power

8 Ohm Stereo—540W/Ch

4 Ohm Stereo—875W/Ch

70-V Line Stereo—890W/Ch

8 Ohm Bridge Mono—1720W

4 Ohm Parallel Mono—1080W

2 Ohm Parallel Mono—1750W

Bridge Mono, 140-V Line—1780W

Parallel Mono, 70-V Line—1765W

Load Impedances: Rated for 16, 8, 4, 2, Ohm, and 70-

V use. Safe with all types of loads, even totally reactive loads.

AC Mains: 120VAC at 60 Hz with standard three-wire grounded connector for North American units; 100VAC,

120VAC, 220VAC, and 240VAC at 50 or 60 Hz units are available when ordered country specific. Com-

Tech amplifiers are not voltage convertable.

Performance

Frequency Response: ±0.1dB from 20 Hz to 20 kHz at 1

Watt.

Phase Response: ±10° from 10 Hz to 20 kHz at 1 Watt.

Signal to Noise Ratio: A-weighted, better than 105 dB below full rated output. Better than 100 dB below full rated output from 20 Hz to 20 kHz.

Total Harmonic Distortion (THD): <0.05% from 20 Hz to

1 kHz, increasing linearly to 0.1% at 20 kHz at 500W.

I.M. Distortion: <0.05% from less than 164 milliwatts to

520 W at 26 dB gain.

Slew Rate: >13V per microsecond. (Slew rates are limited to useful levels for ultrasonic/RF protection.)

Damping Factor: >1000 from 10 Hz to 400 Hz.

DC Offset: <10 millivolts.

Input Impedance: Nominally 20K ohms balanced; 10K ohms unbalanced.

Output Impedance: <10 milliohms in series with <2 microhenries.

Protection Systems: Output Device Emulation Protection (ODEP) limits drive in the event of dangerous dynamic thermal conditions without interrupting power.

Current limiting for shorted load protection. DC/LF and common mode output current Fault circuitry to mute audio. Delay of 4 seconds from turn on mutes amplifier to prevent dangerous turn-on transients.

Mechanical

Input Connectors: Balanced three-terminal barrier block for each channel on standard P.I.P.-BB module (included)

Output Connectors: Four-terminal barrier block.

Front Panel Controls: A front panel rocker switch used to power the amplifier on and off.

Back Panel Controls: A three-position switch which selects Stereo, Bridge-Mono, or Parallel-Mono mode.

A rotary potentiometer for each channel used to control output level. A two position recessed switch for each channel selects between 8/4 ohm and 70-V modes. A push button circuit breaker used to protect the power supply.

Internal Controls: A three-position switch selects 0.775V,

1.4V, or 26 dB voltage gain input sensitivity.

Indicators: Amber Enable indicator shows on/off status of low-voltage power supply. A green indicator for each channel shows the reserve energy status. If no reserve energy is available the indicator will dim in proportion to ODEP limiting. A yellow indicator for each channel flashes in the event of distortion. And green SPI (signal presence indicator) indicators show the presence of output signal.

Construction: Black splatter-coat steel chassis with specially designed flow-through ventilation system.

Mounting: Standard EIA 310 front-panel rack mount with supports for supplemental rear corner mounting.

Dimensions: 19 inches wide, 7 inches high, 16 inches deep behind front mounting surface.

Weight: 57 lbs, 14 oz. (26.3 kg)

Com-Tech 1600 Amplifier Service Manual

Overview

It should be noted that over time Crown makes improvements and changes to their products for various reasons. This manual is up to date as of the time of writing. For additional information regarding these amplifiers, refer to the applicable Technical Notes provided by Crown for this product.

This section of the manual explains the general operation of a typical Crown power amplifier. Topics covered include Front End, Grounded Bridge, and ODEP.

Due to variations in design from vintage to vintage

(and similarities with other Crown products) the theory of operation remains simplified.

Features

Com-Tech amplifiers utilize numerous Crown innovations including grounded bridge and ODEP technologies. Cooling techniques make use of the what is essentially air conditioner technology. Air flows bottom to top, and front to side. Air flows a short distance across a wide heatsink. This type of air flow provides significantly better cooling than the “wind tunnel” technology used by many other manufacturers. Output transistors are of the metal can type rather than plastic case. This allows for a significantly higher thermal margin for the given voltage and current ratings. All devices used are tested and graded to ensure maximum reliability. Another electronic technique used is negative feedback. Almost all power amplifiers utilize negative feedback to control gain and provide stability, but Crown uses multiple nested feedback loops for maximum stability and greatly improved damping. Most Crown amplifiers have damping in excess of 1000 in the bass frequency range. This feedback, along with our compensation and ultra-low distortion output topology, make Crown amplifiers superior.

Features specific to the Com-Tech Series’ include slew rate limiting, and audio muting for delay or protective action. This amplifier can operate in either a Bridged or Parallel Mono mode as well as dual

(stereo). A sensitivity switch allows selection of input voltage required for rated output. Level controls are mounted on the rear panel and are of the rotary type.

Front panel indicators let the user know the status of the low voltage power supply (enable), signal presence, distortion, and an ODEP indicator for each channel which shows the reserve energy status. In general, the packaging of this model is designed for maximum watt/price/weight/size value with user friendly features.

Theory

For additional details refer to the specification section, or to the applicable Owner’s Manual.

Front End Operation

The front end is comprised of three stages: Balanced

Gain Stage (BGS), Variable Gain Stage (VGS), and the Error Amp. Figure 1 shows a simplified diagram of a typical front end with voltage amplification stages.

Balanced Gain Stage (BGS)

Input to the amplifier is balanced. The shield may be isolated from chassis ground by an RC network to interrupt ground loops via the Ground Lift Switch. The non-inverting (hot) side of the balanced input is fed to the non-inverting input of the first op-amp stage. The inverting (negative) side of the balanced input is fed to the inverting input of the first op-amp stage. A potentiometer is provided for common mode rejection adjustment. Electrically, the BGS is at unity gain.

(From an audio perspective, however, this stage actually provides +6dB gain if a fully balanced signal is placed on its input.) The BGS is a non-inverting stage. It’s output is delivered to the Variable Gain

Stage.

Variable Gain Stage (VGS)

From the output of the BGS, the signal goes to the VGS where gain is determined by the position of the Sensitivity Switch, and level is determined by the level control. VGS is an inverting stage with the input being fed to its op-amp stage. Because gain after this stage is fixed at 26dB (factor of 20), greater amplifier sensitivity is achieved by controlling the ratio of feedback to input resistance. The Sensitivity Switch sets the input impedance to this stage and varies the gain such that the overall amplifier gain is 26 dB, or is adjusted appropriately for 0.775V or 1.4V input to attain rated output.

Error Amp

The inverted output from the VGS is fed to the noninverting input of the Error Amp op-amp stage through an AC coupling capacitor and input resistor. Amplifier output is fed back via the negative feedback (NFb) loop resistor. The ratio of feedback resistor to input resistor fixes gain from the Error Amp input to the output of the amplifier at 26 dB. Diodes prevent overdriving the Error Amp. Because the Error Amp amplifies the difference between input and output signals, any difference in the two waveforms will produce a near open loop gain condition which in turn results in high peak output voltage. The output of the

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Com-Tech 1600 Amplifier Service Manual

Theory

Error Amp, called the Error Signal (ES) drives the

Voltage Translators.

Voltage Amplification

The Voltage Translator stage separates the output of the Error Amp into balanced positive and negative drive voltages for the Last Voltage Amplifiers (LVAs), translating the signal from ground referenced ±15V to

±Vcc reference. LVAs provide the main voltage amplification and drive the High Side output stages. Gain from Voltage Translator input to amplifier output is a factor of 25.2.

Voltage Translators

A voltage divider network splits the Error Signal (ES) into positive and negative drive signals for the balanced voltage translator stage. These offset reference voltages drive the input to the Voltage Translator transistors. A nested NFb loop from the output of the amplifier mixes with the inverted signal riding on the offset references. This negative feedback fixes gain at the offset reference points (and the output of the Error

Amp) at a factor of -25.2 with respect to the amplifier output. The Voltage Translators are arranged in a common base configuration for non-inverting voltage gain with equal gain. They shift the audio from the

±15V reference to VCC reference. Their outputs drive their respective LVA.

Also tied into the Voltage Translator inputs are ODEP limiting transistors and control/protection transistors.

The ODEP transistors steal drive as dictated by the

ODEP circuitry (discussed later). The control/protection transistors act as switches to totally shunt audio to ground during the turn-on delay, or during a DC/LF or

Fault protective action.

Last Voltage Amplifiers (LVAs)

The Voltage Translator stage channels the signal to the Last Voltage Amplifiers (LVA's) in a balanced configuration. The +LVA and -LVA, with their push-pull effect through the Bias Servo, drive the fully complementary output stage. The LVAs are configured as common emitter amplifiers. This configuration provides sufficient voltage gain and inverts the audio. The polarity inversion is necessary to avoid an overall polarity inversion from input jack to output jack, and it allows the NFb loop to control Error Amp gain by feeding back to its non-inverting input (with its polarity opposite to the output of the VGS). With the added voltage swing provided by the LVAs, the signal then gains current amplification through the Darlington emitter-follower output stage.

Grounded Bridge Topology

Figure 2 is a simplified example of the grounded bridge output topology. It consists of four quadrants of three deep Darlington (composite) emitter-follower stages per channel: one NPN and one PNP on the

High Side of the bridge (driving the load), and one

NPN and one PNP on the Low Side of the bridge

(controlling the ground reference for the rails). The output stages are biased to operate class AB+B for ultra low distortion in the signal zero-crossing region and high efficiency.

High Side (HS)

The High Side (HS) of the bridge operates much like a conventional bipolar push-pull output configuration.

Audio

Inputs

+

-

BGS

+

-

VGS

+

-

Error

Amp

+15V

-15V

+

ODEP

Q100

Q103

Q121

Q122

Voltage

Translators

+VCC

Q105

Q101

Q102

NPN Outputs (+HS)

PNP Outputs (-HS)

Q110

Mute

NFb Loop

-VCC

LVA's

Figure 1. Typical Amplifier Front End and Voltage Amplification Stages.

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Com-Tech 1600 Amplifier Service Manual

Theory

As the input drive voltage becomes more positive, the

HS NPN conducts and delivers positive voltage to the load. Eventually the NPN devices reach full conduction and +Vcc is across the load. At this time the HS

PNP is biased off. When the drive signal is negative going, the HS PNP conducts to deliver -Vcc to the load and the HS NPN stage is off.

The output of the +LVA drives the base of predriver device. Together, the predriver and driver form the first two parts of the three-deep Darlington and are biased class AB. They provide output drive through the bias resistor, bypassing the output devices, at levels below about 100mW. An RLC network between the predriver and driver provide phase shift compensation and limit driver base current to safe levels.

Output devices are biased class B, just below cutoff.

At about 100mW output they switch on to conduct high current to the load. Together with predriver and driver, the output device provide an overall class AB+B output.

The negative half of the HS is almost identical to the positive half, except that the devices are PNP. One difference is that the PNP bias resistor is slightly greater in value so that PNP output devices run closer to the cutoff level under static (no signal) conditions.

This is because PNP devices require greater drive current.

HS bias is regulated by Q18, the Bias Servo. Q18 is a

Vbe multiplier which maintains approximately 3.3V

Vce under static conditions. The positive and negative halves of the HS output are in parallel with this 3.3V.

With a full base-emitter on voltage drop across predrivers and drivers, the balance of voltage results in approximately .35V drop across the bias resistors in the positive half, and about .5V across the bias resistor in the negative half. Q18 conduction (and thus bias) is adjustable.

A diode string prevents excessive charge build up within the high conduction output devices when off.

Flyback diodes shunt back-EMF pulses from reactive loads to the power supply to protect output devices from dangerous reverse voltage levels. An output terminating circuit blocks RF on output lines from entering the amplifier through its output connectors.

Low Side (LS)

The Low Side (LS) operates quite differently. The power supply bridge rectifier is not ground referenced, nor is the secondary of the main transformer.

In other words, the high voltage power supply floats with respect to ground, but ±Vcc remain constant with respect to each other. This allows the power supply to deliver +Vcc and -Vcc from the same bridge rectifier and filter as a total difference in potential, regardless of their voltages with respect to ground. The LS uses

+

+Vcc (Positive Rail)

Input signal

HIGH SIDE

Load

(speaker)

Inverting Op-amp

-Vcc (Negative Rail) LOW SIDE

-

Figure 2. Crown Patented Grounded Bridge Topology

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Com-Tech 1600 Amplifier Service Manual

Theory inverted feedback from the HS output to control the ground reference for the rails (±Vcc). Both LS quadrants are arranged in a three-deep Darlington and are biased AB+B in the same manner as the HS.

When the amplifier output swings positive, the audio is fed to an op-amp stage where it is inverted. This inverted signal is delivered directly to the bases of the positive (NPN) and negative (PNP) LS predrivers. The negative drive forces the LS PNP devices on (NPN off). As the PNP devices conduct, Vce of the PNP

Darlington drops. With LS device emitters tied to ground, -Vcc is pulled toward ground reference.

Since the power supply is not ground referenced (and the total voltage from +Vcc to -Vcc is constant) +Vcc is forced higher above ground potential. This continues until, at the positive amplifier output peak, -Vcc =

0V and +Vcc equals the total power supply potential with a positive polarity. If, for example, the power supply produced a total of 70V from rail to rail (±35VDC measured from ground with no signal), the amplifier output would reach a positive peak of +70V.

Conversely, during a negative swing of the HS output where HS PNP devices conduct, the op-amp would output a positive voltage forcing LS NPN devices to conduct. This would result in +Vcc swinging toward ground potential and -Vcc further from ground potential. At the negative amplifier output peak, +Vcc = 0V and -Vcc equals the total power supply potential with a negative polarity. Using the same example as above, a 70V supply would allow a negative output peak of -

70V. In summary, a power supply which produces a total of 70VDC rail to rail (or ±35VDC statically) is capable of producing 140V peak-to-peak at the amplifier output when the grounded bridge topology is used. The voltage used in this example are relatively close to the voltages of the PB-1/460CSL.

The total effect is to deliver a peak to peak voltage to the speaker load which is twice the voltage produced by the power supply. Benefits include full utilization of the power supply (it conducts current during both halves of the output signal; conventional designs require two power supplies per channel, one positive and one negative), and never exposing any output device to more than half of the peak to peak output voltage (which does occur in conventional designs).

Low side bias is established by a diode string which also shunts built up charges on the output devices.

Bias is adjustable via potentiometer. Flyback diodes perform the same function as the HS flybacks. The output of the LS is tied directly to chassis ground via ground strap.

Output Device Emulation Protection (ODEP)

To further protect the output stages, a specially developed ODEP circuit is used. It produces a complex analog output signal. This signal is proportional to the always changing safe-operating-area margin of the output transistors. The ODEP signal controls the Voltage Translator stage by removing drive that may exceed the safe-operating-area of the output stage.

ODEP senses output current by measuring the voltage dropped across LS emitter resistors. LS NPN current (negative amplifier output) and +Vcc are sensed, then multiplied to obtain a signal proportional to output power. Positive and negative ODEP voltages are adjustable via two potentiometers. Across ±ODEP are a PTC and a thermal sense (current source). The

PTC is essentially a cutoff switch that causes hard

ODEP limiting if heatsink temperature exceeds a safe maximum, regardless of signal level. The thermal sense causes the differential between +ODEP and –

ODEP to decrease as heatsink temperature increases.

An increase in positive output signal output into a load will result in –ODEP voltage dropping; an increase in negative output voltage and current will cause +ODEP voltage to drop. A complex RC network between the

±ODEP circuitry is used to simulate the thermal barriers between the interior of the output device die

(immeasurable by normal means) and the time delay from heat generation at the die until heat dissipates to the thermal sensor. The combined effects of thermal history and instantaneous dynamic power level result in an accurate simulation of the actual thermal condition of the output transistors.

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Com-Tech 1600 Amplifier Service Manual

Theory

BALANCED

INPUTS

BGS

-1

VGS

ERROR

AMP

+VOLTAGE

TRANSLATOR

+LVA

-1

POSITIVE

HIGH SIDE

OUTPUT

NPN STAGE

OUTPUT

DEVICE

EMULATION

PROTECTION

HIGH SIDE

BIAS

SERVO

-VOLTAGE

TRANSLATOR

-LVA

-1

NEGATIVE

HIGH SIDE

OUTPUT

PNP STAGE

MAIN NEGATIVE FEEDBACK (NFb) LOOP

-1

INVERTING

BRIDGE

BALANCE

LOW SIDE

BIAS

DIODE

STRING

POSITIVE

LOW SIDE

OUTPUT

NPN STAGE

NEGATIVE

LOW SIDE

OUTPUT

PNP STAGE

Figure 3. Typical Crown Amplifier Basic Block Diagram (One Channel Shown)

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Com-Tech 1600 Amplifier Service Manual

Electrical Checkout Procedures

General Information

The following test procedures are to be used to verify operation of this amplifier. DO NOT connect a load or inject a signal unless directed to do so by the procedure. These tests, though meant for verification and alignment of the amplifier, may also be very helpful in troubleshooting. For best results, tests should be performed in order.

All tests assume that AC power is from a regulated 120

VAC source. Test equipment includes an oscilloscope, a DMM, a signal generator, loads, and I.M.D.

and T.H.D. noise test equipment.

Standard Initial Conditions

Level controls fully clockwise.

Stereo/Mono switch in Stereo.

Sensitivity switch in 26 dB fixed gain position.

70-V mode switches in the 8/4 ohm position.

It is assumed, in each step, that conditions of the amplifier are per these initial conditions unless otherwise specified.

Test 1: DC Offset

Spec: 0 VDC, ±10 mV.

Initial Conditions: Controls per standard, inputs shorted.

Procedure: Measure DC voltage at the output connectors (rear panel). There is no adjustment for output offset. If spec is not met, there is an electrical malfunction. Slightly out of spec measurement is usually due to U104/U204 out of tolorance.

Test 2: Output Bias Adjustment

Spec: 300 to 320 mVDC.

Initial Conditions: Controls per standard, heatsink temperature less than 40°C.

Procedure: Measure DC voltage on the output module across R02 (5.6 ohm), adjust R26 if necessary. Measure DC voltage on the output module across R21 (5.6

ohm), adjust R23 if necessary. Repeat for second channel.

Test 3: ODEP Voltage Adjustment

Spec: Bias Per Chart, ±0.1V DC.

Initial Conditions: Controls per standard, heatsink at room temperature 20 to 30°C (68 to 86°F). Note: This adjustment should normally be performed within 2 minutes of turn on from ambient (cold) conditions. If possible measure heatsink temperature, if not measure ambient room temperature. Use this information when referencing the following chart.

66 18.9

68 20.0

70 21.1

72 22.2

74 23.3

76 24.4

77 25.0

78 25.6

80 26.7

82 27.8

84 28.9

86 30.0

88 31.1

90 32.2

92 33.3

94 34.4

The following list of ODEP bias voltages VS. temperature is based on the use of Main Modules built on any circuit board up to and including the D 7993-5 board.

°F °C V

–ODEP

–10.31

–10.26

–10.20

–10.14

–10.09

–10.03

–10.00

–9.97

–9.91

–9.86

–9.80

–9.74

–9.69

–9.63

–9.57

–9.51

11.10

11.07

11.01

10.96

10.90

10.84

10.79

10.73

10.67

10.61

V

+ODEP

11.41

11.36

11.30

11.24

11.19

11.13

66 18.9

68 20.0

70 21.1

72 22.2

74 23.3

76 24.4

77 25.0

78 25.6

80 26.7

82 27.8

84 28.9

86 30.0

88 31.1

90 32.2

92 33.3

94 34.4

The following list of ODEP bias voltages VS. temperature is based on the use of Main Modules built on any circuit board after the D 7993-5 board.

°F °C V

–ODEP

–10.31

–10.26

–10.20

–10.14

–10.09

–10.03

–10.00

–9.97

–9.91

–9.86

–9.80

–9.74

–9.69

–9.63

–9.57

–9.51

10.00

9.97

9.91

9.86

9.80

9.74

9.69

9.63

9.57

9.51

V

+ODEP

10.31

10.26

10.20

10.14

10.09

10.03

–ODEP Procedure: Measure pin 3 of J500 and, if necessary, adjust R121 to obtain V

–ODEP

as specified above.

Measure pin 3 of J500 and, if necessary, adjust R221 to obtain V

–ODEP

as specified above.

+ODEP Procedure: Measure pin 4 of J500 and, if necessary, adjust R132 to obtain V

+ODEP

as specified above.

Measure pin 4 of J500 and, if necessary, adjust R232 to obtain V

+ODEP

as specified above.

12

Com-Tech 1600 Amplifier Service Manual

Electrical Checkout Procedures

Test 4: AC Power Draw

Spec: 80 Watts maximum quiescent.

Initial Conditions: Controls per standard.

Procedure: With no input signal and no load, measure

AC line wattage draw. If current draw is excessive, check for high AC line voltage or high bias voltage.

Test 5: Common Mode Rejection

Spec at 100 Hz: –70 dB.

Spec at 20 kHz: –50 dB.

Initial Conditions: Controls per standard.

Procedure: No load. Inject a 0 dBu (.775VRMS) 100 Hz sine wave into each channel, one channel at a time, with inverting and non-inverting inputs shorted together. At the output measure less than –44 dBu

(4.9mVRMS). Inject a 0 dBu 20 kHz sine wave into each channel, one channel at a time, with inverting and non-inverting inputs shorted together. At the output measure less than –24 dBu (49mVRMS). For Main

Modules with board numbers lower than D 7993-5 adjust N100 and N200 to calibrate CMR. For Main

Modules with board number D 7993-5 or greater adjust R921 and R1021.

Test 6: Voltage Gain

Spec 26dB Gain: Gain of 20.0 ±3%.

Spec 0.775V 8/4 ohm Sensitivity: ±6%.

Spec 0.775V 70-V Sensitivity: ±6%.

Initial Conditions: Controls per standard.

Procedure: No load connected. Inject a 0.775 VAC 1 kHz sine wave with the Sensitivity Switch in the 26 dB position. Measure 15.5 VAC ±0.5 VAC at the amplifier output. Inject a 0.775 VAC 1 kHz sine wave with the

Sensitivity Switch in the 0.775V 8/4 ohm position.

Measure 65.7 VAC ±3.9 VAC at the amplifier output.

Inject a 0.775 VAC 1 kHz sine wave with the Sensitivity

Switch in the 0.775 VAC 70-V position and the Output

Mode Switch in the 70-V position. Measure 70.7 VAC

±4.2 VAC at the amplifier output. Return the Sensitivity

Switch to the 26 dB position. Return the Output Mode

Switches to the 8/4 ohm position.

Test 7: Phase Response

Spec: ±10° from 10 Hz to 20 kHz at 1 Watt.

Initial Conditions: Controls per standard, 8 ohm load on each channel.

Procedure: Inject a 1 kHz sine wave and adjust for 1 watt output (2.8 VAC). Check input and output signals against each other, input and output signals must be within 10° of each other.

Test 8: Level Controls

Spec: Level controlled by level controls.

Initial Conditions: Controls per standard.

Procedure: No load. Inject a 1 kHz sine wave. With level controls fully clockwise you should see full gain. As controls are rotated counterclockwise, observe similar gain reduction in each channel. When complete, return level controls to fully clockwise position.

Test 9: Current Limit

Spec: Current Limit at 39 Amps, ±6 Amps.

Initial Conditions: Controls per standard.

Procedure: Load each channel to 1 ohm. Inject a 1 kHz differentiated (or 10% duty cycle) square wave. See figure 4. Increase output level until current limit occurs. Current limit should occur at 39 ±6 Amps (39

Vpk). Observe clean (no oscillations) current clipping.

In

.047 uF

Out

1K Ohm

Figure 4. Differentiator Circuit

Test 10: Slew Rate & 10 KHz Square Wave

Spec: 17 - 25 V/µS, 8 ohm load.

Initial Conditions: Controls per standard.

Procedure: Load each channel to 8 ohms. Inject a 10 kHz square wave to obtain 35 Volts zero-to-peak at each output. Observe the slope of the square wave. It should typically measure 17-25 V/µS. Also, the square wave must not include overshoot, ringing, or any type of oscillation.

Test 11: Crosstalk

Spec: -60 dB at 20 kHz.

Initial Conditions: Controls per standard. Terminate input of channel not driven with 600 ohms.

Procedure: 8 ohm load on each channel. Inject a 20 kHz sine wave into the channel 1 input and increase output level to 64 VAC. Measure less than 64 mVAC at the output of channel 2. Inject a 20 kHz sine wave into the channel 2 input and increase output level to 64 VAC.

Measure less than 64 mVAC at the output of Ch 1.

13

Com-Tech 1600 Amplifier Service Manual

Electrical Checkout Procedures

Test 12: Output Power

Spec at 8 Ohm Stereo: ≥ 540 Watts/Ch at 0.1% THD

Spec at 4 Ohm Stereo: ≥ 850 Watts/Ch at 0.1% THD

Spec at 70-V Mode, Stereo: ≥ 875 Watts/Ch at 0.1% THD

Initial Conditions: Controls per standard

Procedure: Load each channel to 8 ohms. Inject a 1 kHz sine wave and measure at least 65.72 VAC at the output of each channel. Load each channel to 4 ohms.

Inject a 1 kHz sine wave and measure at least 58.31

VAC at the output of each channel. Switch each channel to the 70-V mode. Load each channel to 6.25

ohms. Inject a 1 kHz sine wave and measure at least

70.7 VAC at the output of each channel. All power measurements must be at less than 0.1% THD.

Test 13: Reactive Loads

Spec: No oscillations. Safe with all types of loads.

Initial Conditions: Controls per standard.

Procedure Capacitive: Load each channel to 8 ohms in parallel with .94µF. Inject a 20 kHz sine wave with 56.9

VAC output for 10 seconds.

Procedure Inductive: Load each channel to 8 ohms in parallel with 159µH. Inject a 1 kHz sine wave with 15

VAC output for 10 seconds.

Procedure Torture: Load each channel with the primary

(red and black leads) of a PS-U transformer (CPN D

7040-5). Each channel in the 70-V mode. Inject a 10 Hz sine wave with an output level sufficient enough to cause 3 to 5 flyback pulses for 10 seconds.

Procedure Short: Inject a 60 Hz sine wave into the input and adjust for 5 VAC at the output. Short each chanel, one at a time, for 10 seconds.

Test 14: ODEP Limiting

Spec: No oscillation on ODEP limiting wave form; either channel controls limiting in Parallel Mono mode.

Initial Conditions: Controls per standard; rag or other obstruction blocking fan blade so it does not turn.

Procedure: Load the amplifier to 2 ohms per channel.

Inject a 60 Hz sine wave into each channel and adjust the output to 15 VAC. Allow the amplifier to heat up until you observe a wave form similar to figure 5. Allow the amplifier to cool for a few miniutes. Switch the amplifier to Parallel Mono mode and remove the load from channel 2. Inject a 60 Hz sine wave into each channel and adjust the output to 15 VAC. Allow the amplifier to heat up and observe limiting on both channels.

Figure 5. ODEP Limiting Wave Form

Test 15: LF Protection

Spec: Amplifier mutes for dangerous subsonic frequencies.

Initial Conditions: Controls per standard.

Procedure: No load. Inject a .5 Hz 6 Vp-p, or a 2 Hz 6

VAC sine wave into each channel and verify that each channel cycles into mute.

Test 16: Signal to Noise Ratio

Spec: ≥ 100 dB below 8 ohm rated continuous average

20-20kHz power.

Initial Conditions: Controls per standard. Short inputs.

Procedure: Load each channel to 8 ohms. Measure less than 648µV at the output of each channel (20 Hz-

20 kHz bandpass filter).

Test 17: Turn off Transients

Spec: < 80mV across an 8 ohm speaker load

Initial Conditions: Controls per standard.

Procedure: Load the output with an 8 ohm speaker.

From an on condition, turn off the amplifier and monitor the output noise at the time of turn off.

Note: Turn off noise may increase significantly if the amplifier is cycled off and on.

14

Com-Tech 1600 Amplifier Service Manual

Electrical Checkout Procedures

Test 18: Intermodulation Distortion

Spec at 0 dB output: ≤ 0.01%.

Spec at -35 dB output: ≤ 0.05%.

Initial Conditions: Controls per standard.

Procedure: Load each channel to 8 ohms. Inject a

SMPTE standard IM signal (60 Hz and 7 kHz sine wave mixed at 4:1 ratio). Set the 60 Hz portion of the sine wave to 51 volts RMS. Set the 7 kHz portion to 25%.

With an IM analyzer measure less than 0.01% IMD.

Repeat test at -35 dB (reference 51 volts RMS, 60 Hz portion) and measure less than 0.05% IMD.

Test 19: Clipping

Spec: No protective action during test.

Initial Conditions: Controls per standard.

Procedure: Load each channel to 8 ohms. Inject a 1 kHz sine wave into each input and drive the output 6 dB into clip for 10 seconds. The amplifier should not activate any protective circuits (ODEP, Fault, or LF

Protection).

Post Testing

After completion of testing, if all tests are satisfactory, the amplifier controls should be returned to the positions required by customer. If conditions are unknown or unspecified, factory settings are as follows:

Level Controls: 9 to 11 O'Clock.

Sensitivity Switch: 0.775V 8/4 Ohm.

Stereo/Mono Switch: Stereo.

70-V Mode Switches: 8/4 Ohm position.

Power: Off

15

Com-Tech 1600 Amplifier Service Manual

Parts List (Non-Module)

Supplimental Items

CPN

A10087-71012

C 3342-0

D 4137-2

A10086-70808

A10101-12

F11489-6

K80636-2

Item

Rack Screw, 10-32 x .75

Feet, Selfstick Black

Nylon Washer

Screw, 8-32 x .5 (For volume cover)

Spacer, #8 x 5/16OD x 1/4L (For volume cover)

Plexiglass Plate (Volume cover)

CT Series Reference Manual

Power Supply

CPN

A10086-70604

A10098-7

C 7786-4

C 7859-9

C 9837-3

C10177-1

C 9924-9

D 7145-2

D 9008-0

D 8087-5

A10094-8

A10098-5

C 8752-5

C 9852-2

C 9870-4

D 2934-4

D 6764-1

D 8438-0

Item

Screw, 6-32 x .25

#6 Belleville Spring Washer

Screw, 10-32 x 5.0 (For transformer)

Relay, 30A 120VAC SPST (100V-120V Models)

Breaker, 30 Amp (100V-120V Models)

Breaker, 20 Amp VDE (200V-240V Models)

Faston, TAB .250 Stud Mount

Power Transformer (120V 60 Hz)

Power Transformer (220V/240V)

Power Transformer (100V/120V)

Washer, #10 Internal Tooth

Washer, 1/4" Belleville Spring

Bridge Rectifier, 35A 400V

Capacitor, 6300µF 200V Electrolytic

Screw, 10-32 x .38

Solder Lug, .218 Hole

Washer, Shoulder

Bracket, Capacitor

Output Assembly (One Per Channel)

CPN

A10315-1

C 9387-9

C 9491-9

C 8188-2

C 8187-4

C 8573-5

C 8574-3

M20591-0

M20590-2

D 7665-9

D 7666-7

D 7796-2

D 6280-8

D 6104-0

D 7797-0

C 7597-4

D 7026-4

D 8774-8

F12019-0

Item

Screw, 6-32 x .56 Hex Washer Head

Plasti-Rivit, .156 2 Prong Blk

Screw, 6-32 x .312 Pan Hd

Output Power Transistor, PNP

Output Power Transistor, NPN

Driver Transistor, 2SA1186 PNP

Driver Transistor, 2SC2837 NPN

Old Style Driver Transistor Assm. NPN, 2SC2527

Old Style Driver Transistor Assm. PNP, 2SA1077

Mounting Clip, TO3P (For Drivers)

Mounting Bracket, TO3P (For Drivers)

Sil Pad, 2.87 x 14.57 (Between Heatsink & Chassis)

Sil Pad for use with Output Board P10315-3

Sil Pad for use with Output Board P10233-8

Output Pad (Between Module and Chassis)

Output Pad for use with Output Board P10315-3

Output Pad for use with Output Board P10233-8

PTC, 95DegC Cast Alum.

Heatsink (Under Diode String)

16

1

1

2

2

4

4

Quantity

8

2

4

4

2

1

4

1

1

4

4

2

1

2

1

1

2

2

Quantity

2

1

1

1

1

2

2

2

2

1

1

1

1

2

2

6

6

Quantity (Per Channel)

12

2

29

Com-Tech 1600 Amplifier Service Manual

Parts List (Non-Module)

Output Assembly Cont. (One Per Channel)

C 8813-5

B 5842-8

C 5826-0

B 5464-1

D 8197-2

M21324-5

Bias Transistor MPS8097/MPSA18 NPN (Q18)

Tubing, #24 Thin Wall Red (For Q18)

LM234Z-6 Thermal Sense (S100/200)

Tubing, #24 Teflon Thin Wall

Shroud, 1.75 x 14.45 Paper

Aluminum Heat Sink, 3/4" With Fins

Back Panel Assembly

CPN

D 8367-1

A10086-10410

A10086-70808

A10094-2

A10100-7

A10109-70808

A10214-7

C10187-0

A11793-0101D

A10793-0503D

C 4508-5

C 5990-4

C 6821-0

C 7957-1

C 8812-7

C10060-9

D 6899-5

D 7623-8

F12725-2

P10286-6

Item

Knob, .5 Dia. Level Control

Screw, 4-40 x .62

Screw, 8-32 x .5

Lockwasher, #4 Internal Star

Aluminum Spacer, .250OD x .140ID x .312L

Screw, 8-18 x .5

Strain Relief

Strain Relief (For European Power Cord)

Power Cord, 14-3 SJT Neon UL/CSA

Power Cord, European Plug (E-13 Amplifiers)

IC Socket, 16 Pin

Barrier Block, 4 Term.

Edge Card Connector, 22 Contact

Slide Switch, DPDT 15A (70-V Mode)

Cable Tie, 5.5"

Header, 5 Pin R Angle Locking

Ribbon Connector, PIP Daisy

Cable, 10" 22AWG With Terminals

Back Panel

PIP Interconnect Board

Chassis Front Assembly

CPN

A10031-1

A10110-70812

A10101-5

A10173-1

C 5297-4

C 6487-0

D 7119-7

F11574J4

F12708-8

F12712-0

F11577J7

Item

Captive Nut, 8-32 x .060 Flush (For rack ears)

Screw, 8-32 x .75 PH Head (For Grille)

Nylon Washer, .5 x .136 x .02 (For Grille)

Clip, Filter Grille

Screw, 8-32 x .37 (For rack ears)

Power Switch, 2 Pole 22 Amp Rocker

Air Filter, 4.9 x 16.23

Front Panel Overlay

End Cap (For Rack ears)

Grille, Filter

4.024" Finger Guard

Main Chassis Assembly

CPN

A10094-3

A10094-4

A10101-13

A10101-14

A10110-70605

Item

Washer, #6 Internal Star, Black

Washer, #6 Internal Star, Zinc

Washer, .25OD X .175ID X .187L Fiber Spacer

Washer, .380OD x .170ID x .125

Screw, 6-32 x .312 Taptite (For covers)

1

2

1

Order in Inches

1

Order in Inches

1

1

1

2

1

1

5

4

5

5

Quantity

4

2

2

1

1

1

1

1

1

1

1

1

1

1

4

1

2

2

2

4

Quantity

2

5

9

2

5

Quantity

11

17

Com-Tech 1600 Amplifier Service Manual

Parts List (Non-Module)

Main Chassis Assembly Cont.

CPN

D 7249-2

D 8501-5

A10086-10606

A10086-70806

A10094-6

A10099-7

A10109-10822

A10110-70812

A10102-5

A10106-70806

A10192-1

C 6066-2

C 7858-1

C 1811-6

C 3163-0

C 6457-3

C 6873-1

C 7862-3

C 9491-9

C10111-0

D 6109-9

D 7060-3

F11632-1

F12643-7

Item

Label, 3 Position Voltage Gain

Cover

Screw, 6-32 x .375

Screw, 8-32 x .37

Washer, #8 Internal Star

Shoulder Washer, #10 Nylon

Screw, 8-18 x 1.375

8-32 x .750 Taptite

Hex Nut, 6-32

Screw, #8 x .37 Hex Washer Head

Snap Bushing, OCB .500

Resistor, 33 Ohm 10W

Fan, 4.7" Ball Bearing

4" Cable Tie

Solder Lug, #6

Screw, #8 x 3/8

.875 Spacer Toggle Nut Plastic

Board Support, 7/8 Locking

Screw, 6-32 x .312

Button, Mtg.

.25 Tab #8H Terminal Strip

Sil Pad, 7 Mil 2.05 x .775

Bracket, Transformer Mtg.

Chassis, 7"

PIP-BB

CPN

M46011-9

A10086-70806

A10094-5

A10110-10608

A10266-2202

C 3842-9

C 6806-1

C 7161-0

F12553J7

P10343-5

Item

PIP-BB Assembly

Screw, 8-32 x .37

Lockwasher, #8 Internal Star Black

Screw, 6-32 x .5

Resistor, 22 Ohm .5W

Barrier Block, 3 Position

Capacitor, .01µF 100V

Screw, #8 x 1/4 #6 PNHD

Panel

PC Board

1

1

2

1

1

2

5

2

2

8

1

1

1

4

4

2

2

4

2

1

2

2

2

Quantity

1

2

1

1

2

2

4

2

2

2

Quantity

1

18

Com-Tech 1600 Amplifier Service Manual

Module and Schematic Information

Module History

The Com Tech 1600B amplifier was introduced in

1990. Since then there have been several updates and revisions, some of which called for new modules.

The following is a list of all modules used up to this date, January 1996.

Output Modules: (left and right are identical)

Q42758-5

Original Output Module on P10233-8 or P10265-5 board.

Q42889-8

Output Module on P10315-3 board.

Q42973-0

Output Module on P10337-7 board. No longer available. Use Q43192-6 as service replacement.

Q43051-4

Output Module on P10337-7 board. No longer available. Use Q43192-6 as service replacement.

Q43192-6

Output Module on P10396-3 board.

Main Modules:

Q42782-5

Original B Version Main Module on D 7222-9 board.

No longer available. Use Q43131-4 as a service replacement.

Q42919-3

Main Module on D 7605-5 board. No longer available.

Use Q23131-4 as a service replacement.

Q43010-0

Main Module on D 7911-7 board. Use Q43131-4 as a service replacement.

Q43041-5

Main Module on D 7993-5 board. No longer available.

Use Q43131-4 as service replacement.

Q43131-4

Main Module on D 8283-0 board.

Q43240-3

Main Module on D 8369-7 board. Detent Pots. Not reverse compatible.

Control Module:

Q42828-6

CT-1600 Control Module on P10251-0 board. No longer available. Use Q43241-1 as service replacement.

Q43213-0

CT-1600 Control Module on P10404-5 board. No longer available. Use Q43241-1 as service replacement.

Q43241-1

CT-1600 Control Module on P10405-2 board.

Display Module:

Q42706-4

CT display on D 7083-5 board.

Schematic Information:

The schematics provided are representative only.

There may be slight variations between amplifier to amplifier. These schematics are intended to be used for troubleshooting purposes only.

For amplifiers with main boards D 7605-5 or earlier, refer to schematic number J0482-0.

For amplifiers with main boards D 7911-7, D 7993-5, or D 8283-0 refer to schematic number J0525-6.

For amplifiers with main board D 8369-7 refer to schematic number J0633-8.

19

Com-Tech 1600 Amplifier Service Manual

Q42828-6 Control Module (P10251-0 board) Parts Lists

Capacitors

C700 C800 C 8426-6

C701 C801 C 8426-6

C900 C 8963-8

Diodes

D700 D800 C 3181-2

D900 C 2851-1

.1µF 250V

.1µF 250V

.47µF 250V

1N4148

1N4004

Resistors

R700 R800 A10266-1222 1.2K .5W

R701 R801 A10266-1812 180 .5W

R900

R901

R902

R903

R904

A10266-2722

A10266-1021

C 7669-2

C 7669-2

A10266-3902

2.7K .5W

1.5K .5W

300 10W

300 10W

39 .5W

Relays

K1 C 7860-7 SPST

ICs

U700 U800 C 7664-3

U901

U902

C 7665-0

C 7665-0

MOC3031 Optotriac

MOC3011 Optotriac

MOC3011 Optotriac

Transistors

Q700 Q800 C 3625-8

Q701 Q801 C 7663-5

Q900

Q901

Q902

C 3625-8

C 3625-8

C 3625-8

PNP 2N4125

Triac MAC224A4

PNP 2N4125

PNP 2N4125

PNP 2N4125

Misc.

Board

J900

P10251-0

C 7672-6

Tab Terminal C 7817-7

0 Ohm Jmp C 5868-2

8 Pin MTA Header

W1-W3, W100-W102

W200-W202

20

Com-Tech 1600 Amplifier Service Manual

Q43213-0 Control Module (P10404-5 board) Parts List

Capacitors

C700 C800 C 8426-6

C701 C801 C 8426-6

C900

C901

C 8963-8

C 8511-5

Diodes

D700 D800 C 3181-2

D900 C 2851-1

.1µF 200V

.1µF 200V

.47µF 250V

.047µF 250V

1N4148

1N4004

Resistors

R700 R800 A10266-1822 1.8K .5W

R701 R801 A10266-1812 180 .5W

R900

R901

R902

R903

R904

R905

A10266-2722 2.7K .5W

A10266-1021 1.5K .5W

C 7669-2

C 7669-2

300 10W

300 10W

A10266-3902 39 .5W

A10266-3602 36 .5W

Relays

K1 C 7860-7 SPST

ICs

U700 U800 C 7664-3 MOC3031 Optotriac

U901 C 7665-0 MOC3011 Optotriac

Transistors

Q700 Q800 C 3625-8

Q701 Q801 C 7663-5

Q900

Q901

Q902

C 3625-8

C 3625-8

C 3625-8

PNP 2N4125

Triac MAC224A4

PNP 2N4125

PNP 2N4125

PNP 2N4125

Misc.

Board

J900

P10404-5

C 7672-6

J901 C 7873-0

Tab Terminal C 7817-7

8 Pin MTA Header

2 Pin MTA Header

W1-W3,

W100-W102,

W200-W202

21

Com-Tech 1600 Amplifier Service Manual

Q43241-1 Control Module (P10405-2 board) Parts List

Capacitors

C700 C800 C 8426-6

C701 C801 C 8426-6

C900 C 8963-8

Diodes

D700 D800 C 3181-2

D900 C 2851-1

.1µF 250V

.1µF 250V

.47µF 250V

1N4148

1N4004

Resistors

R700 R800 A10266-3622 3.6K .5W

R701 R801 A10266-1812 180 .5W

R702 R802 A10266-3622 3.6K .5W

R703 R803 A10266-3622 3.6K .5W

R900

R901

R902

R903

R904

A10266-2722 2.7K .5W

A10266-1021 1.5K .5W

C 7669-2

C 7669-2

300 10W

300 10W

A10266-3902 39 .5W

Relays

K1 C 7860-7 SPST

ICs

U700 U800 C 7664-3

U901

U902

C 7665-0

C 7665-0

MOC3031 Optotriac

MOC3011 Optotriac

MOC3011 Optotriac Transistors

Q700 Q800 C 3625-8

Q701 Q801 C 7663-5

Q900

Q901

Q902

C 3625-8

C 3625-8

C 3625-8

PNP 2N4125

Triac MAC224A4

PNP 2N4125

PNP 2N4125

PNP 2N4125

Misc.

Board

J900

P10405-2

C 7672-6

J901 C 7873-0

Tab Terminal C 7817-7

0 Ohm Jmp C 5868-2

8 Pin MTA Header

2 Pin MTA Header

W1-W3, W100-W102

W200-W202

22

Com-Tech 1600 Amplifier Service Manual

Q42706-4 Display Module (D 7083-5 board) Parts List

Capacitors

C500 C600 C 6802-0

C901 C 6804-6

Diodes

D500 D600 C 3181-2

D501 D601 C 3181-2

D900

D901

C 3533-4

C 3533-4

LED's

E500 E600 C 7863-1

E501 E601 C 4431-0

E502 E602 C 7863-1

E900 C 4342-9

.47µF 50V

.1µF 50V

1N4148

1N4148

1N966B 16V Zener

1N966B 16V Zener

Green

Yellow

Green

Amber

Transistors

Q500 Q600 C 3625-8

Q501 Q601 C 3625-8

Q502 Q602 C 7458-0

Q503 Q603 C 3625-8

2N4125

2N4125

2N4123

2N4125

Resistors

R508 R608 A10266-1021 1K

R905

R906

R907

R908

R909

A10266-5141 510K

A10266-2721 2.7K

R910

R911

R912

R913

R914

R915

R916

R917

R918

R500 R600 A10266-1031 10K

R501 R601 A10266-2221 2.2K

R502 R602 A10266-1051 1M

R503 R603 A102662751 2.7M

R504 R604 A10266-2032 20K .5W

R505 R605 A10266-2221 2.2K

R506 R606 A10266-4751 4.7M

R507 R607 A10266-2221 2.2K

A10266-5141

A10266-3931

A10266-3931

A10266-4741

A10266-3931

A10266-1041

A10266-1031

A10266-8211

A10266-3931

A10266-3631

A10266-8211

A10266-3931

510K

39K

39K

470K

39K

100K

10K

820

39K

36K

820

39K

Integrated Circuits

U903

U904

U905

C 4345-2

C 7661-9

C 4345-2

Misc.

Board

IC Socket

D 7083-5

C 4508-5

LED Spacer C 7712-0

Cable H42913-6

LMT339

LM358N

LMT339

16 Pin

8 Cond 24AWG

Ribbon Cable with Connector

23

Com-Tech 1600 Amplifier Service Manual

Diodes

D01

D02

D03

D04

D05

D06

D07

D08

D09

D10

D11

D12

Q42758-5 Output Module (P10233-8 or P10263-5 board) Parts List

Capacitors

C01

C02

C03

C04

C05

C06

C07

C08

C09

Inductors

L00

L01

L02

C 3978-1

C 2938-6

C 2938-6

C 6806-1

C 6806-1

C 6806-1

C 6807-9

C 6809-5

C 6810-3

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 6592-6

C 3510-2

C 3510-2

.047µF

.1µF

.1µF

.01µF

.01µF

.01µF

.001µF

220pF

180pF

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1.3µH Output Coil

470µH

470µH

Resistors

R17

R18

R19

R20

R21

R22

R23

R24

R25

R26

R27

R28

R30*

R08

R09

R10

R11

R12

R13

R15

R16

R00

R01

R02

R03

R04

R05

R06

R07

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 3299-2

C 4479-9

C 6844-2

C 4300-7

C 2628-3

C 6844-2

C 6495-3

C 4300-7

C 6626-3*

C 2626-7

C 2872-7

C 3299-2

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 4479-9

C 2872-7

C 7317-8

C 1001-4

C 2626-7

C 6486-2

C 6486-2

470

100

5.6 .5W

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

22

100

2.7 5W

2.7 1W

470

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

5.6 .5W

22

250 Pot LS Bias

13K

2.2K

250 Pot HS Bias

390

13K

102*

Misc.

Board

Jumpers

J500 J600

P10233-8 or P10263-5

C 5868-2

C 7057-0

0 Ohm .25W

10 Pin Header

Transistors

Q17

Q19

C 7271-7

C 7318-6

NPN MPSU10

PNP MPSU60

Note:

Transistors are not included with Output Module. See

Output Assembly parts list for these part numbers.

*Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade.

This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor

(A10265-10701); if it is marked with a yellow dot then

R30 should be a 100 Ohm resistor (A10265-10001).

24

Com-Tech 1600 Amplifier Service Manual

Diodes

D01

D02

D03

D04

D05

D06

D07

D08

D09

D10

D11

D12

Capacitors

C01

C02

C03

C04

C05

C06

C07

C08

C09

Inductors

L00

L01

L02

Q42889-8 Output Module (P10315-3 board) Parts List

C 8511-5

C 8426-6

C 8426-6

C 6806-1

C 6806-1

C 6806-1

C 6807-9

C 6809-5

C 6810-3

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 6592-6

C 3510-2

C 3510-2

.047µF 250V Ax

.1µF

.1µF

.01µF

.01µF

.01µF

.001µF

220pF

180pF

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1.3µH Output Coil

470µH

470µH

Transistors

Q17

Q19

C 8508-1

C 8509-9

NPN 2SC3298B

PNP 2SA1306B

Note:

Transistors are not included with Output Module. See

Output Assembly parts list for part numbers.

Resistors

R17

R18

R19

R20

R21

R22

R23

R24

R25

R26

R27

R28

R30*

R08

R09

R10

R11

R12

R13

R15

R16

R00

R01

R02

R03

R04

R05

R06

R07

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 7778-1

C 7779-9

C 6844-2

C 4300-7

C 2628-3

C 6844-2

C 6495-3

C 4300-7

C 6626-3*

C 2626-7

C 2872-7

C 7778-1

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 7779-9

C 2872-7

C 7317-8

C 1001-4

C 2626-7

C 6486-2

C 6486-2

Misc.

Board

Jumpers

P10315-3

C 5868-2

Clips D 6414-3

J500 J600 C 7057-0

470

100

5.6 .5W Flame Proof

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

22 Flame proof

100

2.7 5W

2.7 1W

470

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

5.6 .5W Flame Proof

22 Flame Proof

250 Pot LS Bias

13K

2.2K

250 Pot HS Bias

390

13K

102*

0 Ohm .25W

Q17/Q19 Hold Down

10 Pin Header

*Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade.

This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor

(A10265-10701); if it is marked with a yellow dot then

R30 should be a 100 Ohm resistor (A10265-10001).

25

Com-Tech 1600 Amplifier Service Manual

Diodes

D01

D02

D03

D04

D05

D06

D07

D08

D09

D10

D11

D12

Capacitors

C01

C02

C03

C04

C05

C06

C07

C08

C09

C43

Inductors

L00

L01

L02

Q42973-0 Output Module (P10337-7 board) Parts List

C 8511-5

C 8426-6

C 8426-6

C 6806-1

C 6806-1

C 6806-1

C 6807-9

C 6810-3

C 6809-5

C 7697-3

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2941-0

C 2941-0

C 2941-0

C 2941-0

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 6592-6

C 3510-2

C 3510-2

1N4004

1N4004

1N4004

1N4004

1N5402

1N5402

1N5402

1N5402

1N4004

1N4004

1N4004

1N4004

.047µF

.1µF

.1µF

.01µF

.01µF

.01µF

.001µF

180pF

220pF

.01µF

Output Coil

470µH

470µH

Resistors

R24

R25

R26

R27

R28

R29

R30*

R16

R17

R18

R19

R20

R21

R22

R23

R08

R09

R10

R11

R12

R13

R14

R15

R00

R01

R02

R03

R04

R05

R06

R07

A10266-7501 75

A10266-1011 100

C 7778-1

D 6486-2

D 6486-2

D 6486-2

D 6486-2

D 6486-2

D 6486-2

C 7779-9

5.6 .5W Flame Proof

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

22 .5W Flame Proof

A10266-1011 100

C 7317-8 2.7 5W

A10266-2R73 2.7 1W

A10266-7501 75

A10266-2R73 2.7 1W

D 6486-2

D 6486-2

D 6486-2

D 6486-2

D 6486-2

D 6486-2

C 7778-1

C 7779-9

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

5.6 .5W Flame Proof

22 .5W Flame Proof

C 6844-2 250 Pot LS

A10266-1331 13K

A10266-2221 2.2K

C 6844-2 250 Pot HS

A10266-3911 390

A10266-1331 13K

A10266-5101 51

A10265-10201* 102*

Transistors

Q17

Q19

C 8508-1

C 8509-9

NPN 2SC3298B

PNP 2SA1306B

Note:

Transistors are not included with Output Module. See

Output Assembly parts list for these part numbers.

Misc.

Board

Jumpers

P10337-7

C 5868-2

Clips D 6414-3

J500 J600 C 7057-0

0 Ohm (Qty 6)

Q17/Q19

10 Pin Header

*Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade.

This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor

(A10265-10701); if it is marked with a yellow dot then

R30 should be a 100 Ohm resistor (A10265-10001).

26

Com-Tech 1600 Amplifier Service Manual

Diodes

D01

D02

D03

D04

D05

D06

D07

D08

D09

D10

D11

D12

Capacitors

C01

C02

C03

C04

C05

C06

C07

C08

C09

C43

Inductors

L00

L01

L02

Q43051-4 Output Module (P10337-7 board) Parts List

C 8511-5

C 8426-6

C 8426-6

C 6806-1

C 6806-1

C 6806-1

C 6807-9

C 6810-3

C 6809-5

C 7697-3

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2941-0

C 2941-0

C 2941-0

C 2941-0

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 6592-6

C 3510-2

C 3510-2

1N4004

1N4004

1N4004

1N4004

1N5402

1N5402

1N5402

1N5402

1N4004

1N4004

1N4004

1N4004

.047µF 250V Ax

.1µF

.1µF

.01µF 100V Ax

.01µF 100V Ax

.01µF 100V Ax

.001µF 100V Ax

180pF

220pF

.01µF Disc

1.3µH Output Coil

470µH

470µH

Resistors

R24

R25

R26

R27

R28

R29

R30*

R16

R17

R18

R19

R20

R21

R22

R23

R08

R09

R10

R11

R12

R13

R14

R15

R00

R01

R02

R03

R04

R05

R06

R07

A10266-7501 75

A10266-1011 100

C 7778-1

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 7779-9

5.6 .5W Flame Proof

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

22 .5W Flame Proof

A10266-1011 100

C 7317-8 2.7 5W

A10266-2R73 2.7 1W

A10266-7501 75

A10266-2R73 2.7 1W

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 7778-1

C 7779-9

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

5.6 .5W Flame Proof

22 .5W Flame Proof

C 6844-2 250 Pot LS Bias

A10266-1331 13K

A10266-2221 2.2K

C 6844-2 250 Pot HS Bias

A10266-3911 390

A10266-1331 13K

A10266-5101 51

A10265-10201* 102* 1%

Transistors

Q17

Q19

C 8508-1

C 8509-9

NPN 2SC3298B

PNP 2SA1306B

Misc.

Board

Z1-Z8

P10337-7

C 5868-2

Clips D 6414-3

J500 J600 C 7057-0

0 Ohm Jumper

Q17/Q19 Hold Down

10 Pin Header

Note:

Transistors are not included with Output Module. See

Output Assembly parts list for these part numbers.

*Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade.

This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor

(A10265-10701); if it is marked with a yellow dot then

R30 should be a 100 Ohm resistor (A10265-10001).

27

Com-Tech 1600 Amplifier Service Manual

Q43192-6 Output Module (P10396-3 board) Parts List Cont.

Diodes

D01

D02

D03

D04

D05

D06

D07

D08

D09

D10

D11

D12

Capacitors

C01

C02

C03

C04

C05

C06

C07

C08

C09

C43

Inductors

L00

L01

L02

C 8511-5

C 8426-6

C 8426-6

C 6806-1

C 6806-1

C 6806-1

C 6807-9

C 6810-3

C 6809-5

C 7697-3

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2941-0

C 2941-0

C 2941-0

C 2941-0

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 6592-6

C 3510-2

C 3510-2

1N4004

1N4004

1N4004

1N4004

1N5402

1N5402

1N5402

1N5402

1N4004

1N4004

1N4004

1N4004

.047µF 250V Ax

.1µF

.1µF

.01µF 100V Ax

.01µF 100V Ax

.01µF 100V Ax

.001µF 100V Ax

180pF

220pF

.01µF Disc

1.3µH Output Coil

470µH

470µH

Resistors

R24

R25

R26

R27

R28

R29

R30*

R16

R17

R18

R19

R20

R21

R22

R23

R08

R09

R10

R11

R12

R13

R14

R15

R00

R01

R02

R03

R04

R05

R06

R07

A10266-7501 75

A10266-1011 100

C 7778-1

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 7779-9

5.6 .5W Flame Proof

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

22 .5W Flame Proof

A10266-1011 100

C 7317-8 2.7 5W

A10266-2R73 2.7 1W

A10266-7501 75

A10266-2R73 2.7 1W

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 6486-2

C 7778-1

C 7779-9

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

.2 5W

5.6 .5W Flame Proof

22 .5W Flame Proof

C 6844-2 250 Pot LS Bias

A10266-1331 13K

A10266-2221 2.2K

C 6844-2 250 Pot HS Bias

A10266-3911 390

A10266-1331 13K

A10266-5101 51

A10265-10201* 102* 1%

Transistors

Q17

Q19

C 8508-1

C 8509-9

NPN 2SC3298B

PNP 2SA1306B

Misc.

Board

Z1-Z7, Z9

Z8

Clips

P10396-3

C 5868-2

A10124-24

D 6414-3

J500 J600 C 7057-0

0 Ohm Jumper

Solid Wire

Q17/Q19 Hold Down

10 Pin Header

Note:

Transistors are not included with Output Module. See

Output Assembly parts list for these part numbers.

*Note: R30 is 102 Ohms in most units, though in some cases a different value may be used to match the installed S100/S200 LM334 (C5826-0) device grade.

This is the standard value and is used with the most common LM334 grade, green. If the LM334 is marked with a blue dot, R30 should be a 107 Ohm resistor

(A10265-10701); if it is marked with a yellow dot then

R30 should be a 100 Ohm resistor (A10265-10001).

28

Com-Tech 1600 Amplifier Service Manual

Q42782-5 Main Module (D 7222-9 board) Parts List

Capacitors

C1

C2

C3

C4

C 4303-1

C 3913-8

C 4303-1

C 6802-0

C5

C6

A10124-24

A10124-24

C7 C 8897-8

C100 C200 C 8026-4

C101 C201 C 3409-7

C103 C203 C 6805-3

C104 C204 C 6805-3

C105 C205 C 6812-9

C106 C206 C 6812-9

C107 C207 C 6804-6

C108 C208 C 6814-5

C109 C209 C 6804-6

C110 C210 C 5362-6

C111 C211 C 6804-6

C112 C212 C 6803-8

C113 C213 C 6802-0

C114 C214 C 8026-4

C115 C215 C 8026-4

C116 C216 C 6802-0

C117 C217 C 6803-8

C118 C218 C 6814-5

C119 C219 C 6802-0

C120 C220 C 6804-6

C122 C222 C 6811-1

C123 C223 C 6812-9

C124 C224 C 6812-9

C129 C229 C 6814-5

C130 C230 C 6814-5

C133 C233 C 6813-7

C134 C234 C 6805-3

C135 C235 C 6805-3

C136 C236 C 6808-7

C137 C237 C 6808-7

C138 C238 C 6813-7

C139 C239 C 6813-7

C140 C240 C 6812-9

C141 C241 C 6812-9

C144 C244 C 8026-4

C145 C245 C 6812-9

C146 C246 C 6812-9

C147 C247 C 6806-1

C148 C248 C 6810-3

C149 C249 C 6808-7

C150 C250 C 6806-1

C151 C251 C 6806-1

C152 C252 C 6813-7

C153 C253 C 6804-6

C154 C254 C 6804-6

C156 C256 C 6804-6

12pF

.47µF

.1µF

100pF

47pF

47pF

12pF

12pF

2.2µF

.1µF

.12µF

.47µF

100µF

100µF

.47µF

.12µF

1000µF

470µF

1000µF

.47µF

Jumper Wire

Jumper Wire

.1µF

100µF

47pF

.022µF

.022µF

47pF

47pF

.1µF

12pF

.1µF

47pF

100µF

47pF

47pF

.01µF

180pF

470pF

.01µF

27pF

.022µF

.022µF

470pF

470pF

27pF

27pF

47pF

.01µF

27pF

.1µF

.1µF

.1µF

Diodes

D5

D6

D7

D9

D1

D2

D3

D4

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 5061-4

D104 D204 C 2851-1

D105 D205 C 2851-1

D106 D206 C 2851-1

D107 D207 C 2851-1

D108 D208 C 3181-2

D109 D209 C 3181-2

D110 D210 C 3181-2

D111 D211 C 5061-4

D112 D212 C 3181-2

D113 D213 C 3181-2

D114 D214 OPEN

D115 D215 OPEN

D120 D220 C 3181-2

D121 D221 C 3181-2

D122 D222 C 3181-2

D123 D223 C 5061-4

D124 D224 C 3181-2

D125 D225 C 3181-2

Transistors

Q100 Q200 D 2961-7

Q101 Q201 C 3578-9

Q102 Q202 C 3810-6

Q103 Q203 C 3786-8

Q105 Q205 C 3578-9

Q106 Q206 C 3625-8

Q107 Q207 C 3786-8

Q108 Q208 D 2961-7

Q109 Q209 D 2961-7

Q110 Q210 C 3810-6

Q112 Q212 C 3625-8

Q113 Q213 C 3625-8

Q115 Q215 D 2962-5

Q116 Q216 C 3786-8

Q117 Q217 D 2961-7

Q118 Q218 D 2961-7

Q119 Q219 C 3625-8

Q120 Q220 C 3625-8

Q121 Q221 C 7458-0

Q122 Q222 C 7458-0

Q123 Q223 C 7458-0

Q124 Q224 C 3625-8

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N3070

1N4004

1N4004

1N4004

1N4004

1N4148

1N4148

1N4148

1N3070

1N4148

1N4148

1N4148

1N4148

1N4148

1N3070

1N4148

1N4148

NPN 2N3859A

PNP MPSA93

NPN MPSA43

PNP PN4250

PNP MPSA93

NPN 2N4125

PNP PN4250

NPN 2N3859A

NPN 2N3859A

NPN MPSA43

NPN 2N4125

NPN 2N4125

NPN MPS8097

PNP PN4250

NPN 2N3859A

NPN 2N3859A

NPN 2N4125

NPN 2N4125

NPN 2N4123

NPN 2N4123

NPN 2N4123

NPN 2N4125

29

Com-Tech 1600 Amplifier Service Manual

Resistors (.25W 5% unless noted otherwise)

N100

N101

N102

R1

N200

N201

N202

C 4669-4

D 6081-0

D 6082-8

Resistor Network

Resistor Network

Resistor Network

A10265-10021 10K 1%

R2

R3

R4

R7

R8

R9

R10

R16

OPEN

OPEN

A10265-10521 10.5K 1%

A10266-1041 100K

A10266-2031 20K

A10266-6821 6.8K

OPEN

A10266-6821 6.8K

R17

R18

A10266-2031 20K

A10266-1041 100K

R100 R200 C 7409-3 5K Linear Pot

R101 R201 A10265-10211 1.02K 1%

R102 R202 A10266-5111 510

R103 R203 A10265-20521 20.5K 1%

R104 R204 A10266-2721 2.7K

R105 R205 A10266-2721 2.7K

R106 R206 A10266-1231 12K

R107 R207 A10266-6831 68K

R108 R208 A10266-8211 820

R109 R209 A10266-6801 68

R110 R210 A10266-6831 68K

R111 R211 A10266-1231 12K

R112 R212 A10266-5131 51K

R113 R213 A10266-4721 4.7K

R114 R214 A10266-4721 4.7K

R115 R215 A10266-5141 510K

R116 R216 A10266-3351 3.3M

R117 R217 A10266-4731 47K

R118 R218 A10266-2711 270

R119 R219 A10266-3911 390

R120 R220 A10266-2711 270

R121 R221 C 5062-2 100K Pot (-ODEP)

R122 R222 A10266-2741 270K

R123 R223 A10266-2032 20K .5W

R124 R224 A10266-6821 6.8K

R125 R225 C 7782-3

R126 R226 C 7782-3

100 Flame Proof

100 Flame Proof

R127 R227 A10266-6821 6.8K

R128 R228 A10266-1031 10K

R129 R229 A10266-1041 100K

R130 R230 A10266-1041 100K

R131 R231 A10266-1031 10K

R132 R232 C 5062-2 100K Pot (+ODEP)

R133 R233 A10266-2741 270K

R134 R234 A10266-2032 20K .5W

R135 R235 C 7782-3 100 Flame Proof

R136 R236 A10266-6821 6.8K

Q42782-5 Main Module (D 7222-9 board) Parts List

R137 R237 C 7782-3 100 Flame Proof

R138 R238 A10266-6821 6.8K

R139 R239 A10266-8211 820

R140 R240 A10266-6801 68

R141 R241 A10266-1541 150K

R142 R242 A10266-1541 150K

R143 R243 A10266-1041 100K

R144 R244 A10266-1041 100K

R145 R245 A10266-1851 1.8M

R146 R246 A10266-1031 10K

R147 R247 C 7781-5 200 .5W Flame Proof

R148 R248 A10266-2721 2.7K

R149 R249 C 7781-5 200 .5W Flame Proof

R150 R250 A10266-2721 2.7K

R151 R251 A10266-1031 10K

R152 R252 A10265-1231 12K

R153 R253 JUMPER

R154 R254 C 8261-7

A10124-24

121K 0.1%

R155 R255 A10266-1321 1.3K

R156 R256 A10266-1321 1.3K

R157 R257 A10266-1321 1.3K

R158 R258 A10265-9121 9.1K

R159 R259 A10266-3321 3.3K

R160 R260 C 8260-9 10K 0.1%

R161 R261 A10266-4701 47

R162 R262 A10266-4701 47

R163 R263 C 8261-7

R164 R264 C 8260-9

R165 R265 C 8261-7

121K 0.1%

10K 0.1%

121K 0.1%

R166 R266 A10266-1851 1.8M

R167 R267 A10265-10011 1K 1%

R168 R268 A10265-95301 953 1%

R169 R269 A10266-2431 24K

R170 R270 A10265-10011 1K 1%

R171 R271 A10265-95301 953 1%

R172 R272 A10266-2431 24K

R173 R273 C 8260-9 10K 0.1%

R174 R274 A10265-24921 24.9K 1%

R175 R275 A10265-76811 7.68K 1%

R176 R276 A10265-24921 24.9K 1%

R177 R277 A10265-69811 6.98K 1%

R178 R278 A10266-1231 12K

R179 R279 A10266-1321 1.3K

R180 R280 A10266-4711 470

R181 R281 A10266-4721 4.7K

R182 R282 A10266-2201 22

R183 R283 A10266-2421 2.4K

R184 R284 A10266-4741 470K

R185 R285 A10266-2421 2.4K

R186 R286 A10266-2751 2.7M

R187 R287 A10266-3631 36K

R188 R288 A10266-3631 36K

30

Com-Tech 1600 Amplifier Service Manual

Q42782-5 Main Module (D 7222-9 board) Parts List

R189 R289 A10266-2731 27K

R190 R290 A10266-2051 2M

R191 R291 A10266-3331 33K

R192 R292 A10266-1031 10K

R193 R293 A10266-1031 10K

R194 R294 A10266-2031 20K

R195 R295 A10266-4701 47

R196 R296 A10266-4721 4.7K

R197 R297 A10266-1031 10K

R198 R298 A10266-4721 4.7K

R199 R299 A10266-1031 10K

Switches

S2

S3

S4

OPEN

C 7960-5

C 6781-6

Sensitivity

Switch, Stereo/Mono

IC’s

U1

U2

C 5095-2

C 5096-0

U100 U200 C 6911-9

U101 U201 C 4345-2

U102 U202 C 4345-2

U103 U203 C 6910-1

U104 U204 C 6900-2

UA7815

UA7915

UPA75

LM339

LM339

UPA76

MC34084P

Misc.

Board

Socket

Nut

Heatsink

Washer

D 7222-9

C 3450-1

A10102-5

C 5341-0

Torq Spreader C 6541-4

14 Pin (Qty 6)

Hex 6-32 (Qty 2)

TO-220 (Qty 2)

(Qty 2)

A10096-5 #6, Split (Qty 2)

A10240-0608 Stainless (Qty 2) Screw

J1

J2

J11

C 7593-4

C 4508-5

C 7526-4

J100 J200 OPEN

J500 J800 D 6619-7

J600 J700 D 6620-5

Cable Tie C 1811-6

5 Pin Header

16 Pin Socket

3 Pin Header

10 Inch Ribbon

6 Inch Ribbon

(Qty 4)

31

Com-Tech 1600 Amplifier Service Manual

Q42919-3 Main Module (D 7605-5 board) Parts List

Capacitors

C1

C2

C3

C4

C 4303-1

C 3913-8

C 4303-1

C 6802-0

C5

C6

A10124-24

A10124-24

C7 C 6804-6

C100 C200 C 5311-3

C101 C201 C 2821-4

C103 C203 C 6805-3

C104 C204 C 6805-3

C105 C205 C 6812-9

C106 C206 C 6812-9

C107 C207 C 6804-6

C108 C208 C 6814-5

C109 C209 C 7417-6

C110 C210 C 5362-6

C111 C211 C 6804-6

C112 C212 C 6803-8

C113 C213 C 6802-0

C114 C214 C 8026-4

C115 C215 C 8026-4

C116 C216 C 6802-0

C117 C217 C 6803-8

C118 C218 C 6814-5

C119 C219 C 6802-0

C120 C220 C 6804-6

C122 C222 C 6811-1

C123 C223 C 6812-9

C124 C224 C 6812-9

C129 C229 C 6814-5

C130 C230 C 6813-7

C133 C233 C 6813-7

C134 C234 C 6805-3

C135 C235 C 6805-3

C136 C236 C 6808-7

C137 C237 C 6808-7

C138 C238 C 6813-7

C139 C239 C 6813-7

C140 C240 C 6812-9

C141 C241 C 6812-9

C144 C244 C 8026-4

C145 C245 C 6812-9

C146 C246 C 6812-9

C147 C247 C 6806-1

C148 C248 C 6810-3

C149 C249 C 6808-7

C150 C250 C 6806-1

C151 C251 C 6806-1

C152 C252 C 6950-7

C153 C253 C 6804-6

12pF

.47µF

.1µF

100pF

47pF

47pF

12pF

27pF

2.2µF

.1µF

.12µF

.47µF

100µF

100µF

.47µF

.12µF

1000µF

470µF

1000µF

.47µF

Jumper Wire

Jumper Wire

.1µF

22µF

10pF

.022µF

.022µF

47pF

47pF

.1µF

12pF

.0033µF

47pF

100µF

47pF

47pF

.01µF

180pF

470pF

.01µF

27pF

.022µF

.022µF

470pF

470pF

27pF

27pF

47pF

.01µF

82pF

.1µF

C154 C254 C 5243-8

C155 C255 C 6804-6

C156 C256 C 6804-6

C157 C257 C 6806-1

Diodes

D5

D6

D7

D9

D1

D2

D3

D4

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 2851-1

C 5061-4

D104 D204 C 2851-1

D105 D205 C 2851-1

D106 D206 C 2851-1

D107 D207 C 2851-1

D108 D208 C 3181-2

D109 D209 C 3181-2

D110 D210 C 3181-2

D111 D211 C 5061-4

D112 D212 C 3181-2

D113 D213 C 3181-2

D114 D214 OPEN

D115 D215 OPEN

D120 D220 C 3181-2

D121 D221 C 3181-2

D122 D222 C 3181-2

D123 D223 C 5061-4

D124 D224 C 3181-2

D125 D225 C 3181-2

Transistors

Q100 Q200 D 2961-7

Q101 Q201 C 3578-9

Q102 Q202 C 3810-6

Q103 Q203 C 3786-8

Q105 Q205 C 3578-9

Q106 Q206 C 3625-8

Q107 Q207 C 3786-8

Q108 Q208 D 2961-7

Q109 Q209 D 2961-7

Q110 Q210 C 3810-6

Q112 Q212 C 3625-8

Q113 Q213 C 3625-8

Q115 Q215 D 2962-5

Q116 Q216 C 3786-8

Q117 Q217 D 2961-7

Q118 Q218 D 2961-7

Q119 Q219 C 3625-8

Q120 Q220 C 3625-8

.1µF 250V

.1µF

.1µF

.01µF

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N3070

1N4004

1N4004

1N4004

1N4004

1N4148

1N4148

1N4148

1N3070

1N4148

1N4148

1N4148

1N4148

1N4148

1N3070

1N4148

1N4148

NPN 2N3859A

PNP MPSA93

NPN MPSA43

PNP PN4250

PNP MPSA93

NPN 2N4125

PNP PN4250

NPN 2N3859A

NPN 2N3859A

NPN MPSA43

NPN 2N4125

NPN 2N4125

NPN MPS8097

PNP PN4250

NPN 2N3859A

NPN 2N3859A

NPN 2N4125

NPN 2N4125

32

Com-Tech 1600 Amplifier Service Manual

Q121 Q221 C 7458-0

Q122 Q222 C 7458-0

Q123 Q223 C 7458-0

Q124 Q224 C 3625-8

NPN 2N4123

NPN 2N4123

NPN 2N4123

NPN 2N4125

Resistors (.25W 5% unless noted otherwise)

N100

N101

N102

R1

N200

N201

N202

C 4669-4

D 6081-0

D 6082-8

Resistor Network

Resistor Network

Resistor Network

A10265-53621 53.6K 1%

R2

R3

R4

R7

R8

R9

R10

R16

A10266-2231 22K

A10266-2231 22K

A10265-46421 46.4K 1%

A10266-1041 100K

A10266-2031 20K

A10266-5121 5.1K

OPEN

A10266-5121 5.1K

R17

R18

A10266-2031 20K

A10266-1041 100K

R100 R200 C 7409-3 5K Linear Pot

R101 R201 A10265-49911 4.99K 1%

R102 R202 A10266-5111 510

R103 R203 A10265-10031 100K 1%

R104 R204 A10266-2721 2.7K

R105 R205 A10266-2721 2.7K

R106 R206 A10266-1231 12K

R107 R207 A10266-6831 68K

R108 R208 A10266-8211 820

R109 R209 A10266-6801 68

R110 R210 A10266-6831 68K

R111 R211 A10266-1231 12K

R112 R212 A10266-5131 51K

R113 R213 A10266-4721 4.7K

R114 R214 A10266-4721 4.7K

R115 R215 A10266-5141 510K

R116 R216 A10266-2751 2.7M

R117 R217 A10266-4731 47K

R118 R218 A10266-2711 270

R119 R219 A10266-3911 390

R120 R220 A10266-2711 270

R121 R221 C 5062-2 100K Pot (-ODEP)

R122 R222 A10266-2741 270K

R123 R223 A10266-2032 20K .5W

R124 R224 A10266-6821 6.8K

R125 R225 C 7782-3

R126 R226 C 7782-3

100 Flame Proof

100 Flame Proof

R127 R227 A10266-6821 6.8K

R128 R228 A10266-1031 10K

R129 R229 A10266-1041 100K

R130 R230 A10266-1041 100K

R131 R231 A10266-1031 10K

Q42919-3 Main Module (D 7605-5 board) Parts List

R132 R232 C 5062-2 100K Pot (+ODEP)

R133 R233 A10266-2741 270K

R134 R234 A10266-2032 20K .5W

R135 R235 C 7782-3 100 Flame Proof

R136 R236 A10266-6821 6.8K

R137 R237 C 7782-3 100 Flame Proof

R138 R238 A10266-6821 6.8K

R139 R239 A10266-8211 820

R140 R240 A10266-6801 68

R141 R241 A10266-1541 150K

R142 R242 A10266-1541 150K

R143 R243 A10266-1041 100K

R144 R244 A10266-1041 100K

R145 R245 A10266-1851 1.8M

R146 R246 A10266-1231 12K

R147 R247 C 1007-1 100

R148 R248 A10266-2721 2.7K

R149 R249 C 1007-1 100

R150 R250 A10266-2721 2.7K

R151 R251 A10266-1231 12K

R152 R252 A10266-1231 12K

R153 R253 JUMPER A10124-24

R154 R254 A10265-12131 121K 1%

R155 R255 A10266-1321 1.3K

R156 R256 A10266-1321 1.3K

R157 R257 A10266-1321 1.3K

R158 R258 A10266-9121 9.1K

R159 R259 A10266-1021 1K

R160 R260 A10266-10021 10K 1%

R161 R261 A10266-4701 47

R162 R262 A10266-4701 47

R163 R263 A10265-12131 121K 1%

R164 R264 A10265-10021 10K 1%

R165 R265 A10265-12131 121K 1%

R166 R266 A10266-1851 1.8M

R167 R267 A10265-10011 1K 1%

R168 R268 A10265-95301 953 1%

R169 R269 A10266-2431 24K

R170 R270 A10265-10011 1K 1%

R171 R271 A10265-95301 953 1%

R172 R272 A10266-2431 24K

R173 R273 A10265-10021 10K 1%

R174 R274 A10265-24921 24.9K 1%

R175 R275 A10265-76811 7.68K 1%

R176 R276 A10265-24921 24.9K 1%

R177 R277 A10265-69811 6.98K 1%

R178 R278 A10266-1231 12K

R179 R279 A10266-1321 1.3K

R180 R280 A10266-4711 470

R181 R281 A10266-4721 4.7K

R182 R282 A10266-2201 22

R183 R283 A10266-2421 2.4K

33

Com-Tech 1600 Amplifier Service Manual

Q42919-3 Main Module (D 7605-5 board) Parts List

R184 R284 A10266-4741 470K

R185 R285 A10266-2421 2.4K

R186 R286 A10266-2751 2.7M

R187 R287 A10266-3631 36K

R188 R288 A10266-3631 36K

R189 R289 A10266-2731 27K

R190 R290 A10266-2051 2M

R191 R291 A10266-3331 33K

R192 R292 A10266-1031 10K

R193 R293 A10266-1031 10K

R194 R294 A10266-1041 100K

R195 R295 A10266-3021 3K

R196 R296 A10266-4721 4.7K

R197 R297 A10266-1031 10K

R198 R298 A10266-4721 4.7K

R199 R299 A10266-1031 10K

R906 R1006 A10266-1541 150K

R907 R1007 A10266-1541 150K

R908 R1008 A10266-1541 150K

R909 R1009 A10266-4741 470K

R910 R1010 A10266-4741 470K

R911 R1011 A10266-1521 1.5K

R912 R1012 A10266-4711 470

R913 R1013 A10266-1051 1M

R914 R1014 A10266-1051 1M

R915 R1015 A10266-2201 22

R916 R1016 A10266-2201 22

Switches

S2

S3

S4

OPEN

C 7960-5

C 6781-6

Sensitivity

Switch, Stereo/Mono

IC’s

U1

U2

C 5095-2

C 5096-0

U100 U200 C 6911-9

U101 U201 C 4345-2

U102 U202 C 4345-2

U103 U203 C 6910-1

U104 U204 C 7558-7

UA7815

UA7915

UPA75

LM339

LM339

UPA76

MC33079P

Misc.

Board

Socket

Nut

Heatsink

Washer

D 7605-5

C 3450-1

A10102-5

C 5341-0

Torq Spreader C 6541-4

14 Pin (Qty 6)

Hex 6-32 (Qty 2)

TO-220 (Qty 2)

(Qty 2)

A10096-5 #6, Split (Qty 2)

A10240-0608 Stainless (Qty 2) Screw

J1

J2

J11

C 7593-4

C 4508-5

C 7526-4

J100 J200 OPEN

J500 J800 D 6619-7

J600 J700 D 6620-5

Cable Tie C 1811-6

5 Pin Header

16 Pin Socket

3 Pin Header

10 Inch Ribbon

6 Inch Ribbon

(Qty 4)

34

Com-Tech 1600 Amplifier Service Manual

Q43010-0 Main Module (D 7911-7 board) Parts List

Capacitors

C1

C2

C4

C5

C 4303-1

C 3913-8

C 6802-0

A10124-24

C6

C7

A10124-24

C 6804-6

C100 C200 C 5311-3

C101 C201 C 2821-4

C103 C203 C 6805-3

C104 C204 C 6805-3

C105 C205 C 6812-9

C106 C206 C 6812-9

C107 C207 C 6804-6

C108 C208 C 6814-5

C109 C209 C 7417-6

C110 C210 C 5362-6

C111 C211 C 6804-6

C112 C212 C 6803-8

C113 C213 C 6802-0

C114 C214 C 8848-1

C115 C215 C 8848-1

C116 C216 C 6802-0

C117 C217 C 6803-8

C118 C218 C 6814-5

C119 C219 C 6802-0

C120 C220 C 6804-6

C122 C222 C 6811-1

C123 C223 C 6812-9

C124 C224 C 6812-9

C129 C229 C 6814-5

C130 C230 C 6813-7

C133 C233 C 6813-7

C134 C234 C 6805-3

C135 C235 C 6805-3

C136 C236 C 6808-7

C137 C237 C 6808-7

C138 C238 C 6813-7

C139 C239 C 6813-7

C140 C240 C 6812-9

C141 C241 C 6812-9

C144 C244 C 8576-8

C145 C245 C 6812-9

C146 C246 C 6812-9

C147 C247 C 6806-1

C148 C248 C 6810-3

C149 C249 C 6808-7

C150 C250 C 6806-1

C151 C251 C 6806-1

C152 C252 C 6950-7

C153 C253 C 6804-6

C154 C254 C 8426-6

.47µF

.1µF

100pF

47pF

47pF

12pF

27pF

27pF

.1µF

.12µF

.47µF

100µF

100µF

.47µF

.12µF

12pF

1000µF

470µF

.47µF

Jumper Wire

Jumper Wire

.1µF

22µF

10pF

.022µF

.022µF

47pF

47pF

.1µF

12pF

.0033µF

2.2µF

100µF

47pF

47pF

.01µF

180pF

470pF

.01µF

.01µF

.022µF

.022µF

470pF

470pF

27pF

27pF

47pF

47pF

82pF 5%

.1µF

.1µF 250V

.1µF

.1µF

.01µF

C155 C255 C 6804-6

C156 C256 C 6804-6

C157 C257 C 6806-1

Diodes

D1

D2

D3

D4

C 2851-1

C 2851-1

C 2851-1

C 2851-1

D5

D6

C 2851-1

C 2851-1

D7 C 2851-1

D108 D208 C 3181-2

D109 D209 C 3181-2

D110 D210 C 3181-2

D111 D211 C 5061-4

D112 D212 C 3181-2

D113 D213 C 3181-2

D114 D214 OPEN

D115 D215 OPEN

D120 D220 C 3181-2

D121 D221 C 3181-2

D122 D222 C 3181-2

D123 D223 C 5061-4

D124 D224 C 3181-2

D125 D225 C 3181-2

D126 D226 C 5061-4

D127 D227 C 5061-4

D128 D228 C 5061-4

D129 D229 C 3181-2

D130 D230 C 3181-2

D131 D231 C 3181-2

D132 D232 C 3181-2

Transistors

Q100 Q200 D 2961-7

Q101 Q201 C 3578-9

Q102 Q202 C 3810-6

Q103 Q203 C 3786-8

Q105 Q205 C 3578-9

Q106 Q206 C 3625-8

Q107 Q207 C 3786-8

Q108 Q208 D 2961-7

Q109 Q209 D 2961-7

Q110 Q210 C 3810-6

Q112 Q212 C 3625-8

Q113 Q213 C 3625-8

Q115 Q215 D 2962-5

Q116 Q216 C 3786-8

Q117 Q217 D 2961-7

Q118 Q218 D 2961-7

Q119 Q219 C 3625-8

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4148

1N4148

1N4148

1N3070

1N4148

1N4148

1N4148

1N4148

1N4148

1N3070

1N4148

1N4148

1N3070

1N3070

1N3070

1N4148

1N4148

1N4148

1N4148

NPN 2N3859A

PNP MPSA93

NPN MPSA43

PNP PN4250

PNP MPSA93

NPN 2N4125

PNP PN4250

NPN 2N3859A

NPN 2N3859A

NPN MPSA43

NPN 2N4125

NPN 2N4125

NPN MPS8097

PNP PN4250

NPN 2N3859A

NPN 2N3859A

NPN 2N4125

35

Com-Tech 1600 Amplifier Service Manual

Q120 Q220 C 3625-8

Q121 Q221 C 7458-0

Q122 Q222 C 7458-0

Q123 Q223 C 7458-0

Q124 Q224 C 3625-8

NPN 2N4125

NPN 2N4123

NPN 2N4123

NPN 2N4123

NPN 2N4125

Resistors (.25W 5% unless noted otherwise)

N100

N101

N102

R1

N200

N201

N202

D 4669-4

D 6081-0

D 6082-8

Resistor Network

Resistor Network

Resistor Network

A10265-53621 53.6K 1%

R2

R3

R4

R7

R8

R9

R10

R16

OPEN

OPEN

A10265-46421 46.4K 1%

A10266-1041 100K

A10266-2031 20K

A10266-5121 5.1K

OPEN

A10266-5121 5.1K

R17

R18

A10266-2031 20K

A10266-1041 100K

R100 R200 C 7409-3 5K Linear Pot

R101 R201 A10265-49911 4.99K 1%

R102 R202 A10266-5111 510

R103 R203 A10265-10031 100K 1%

R104 R204 A10266-2721 2.7K

R105 R205 A10266-2721 2.7K

R106 R206 A10266-1231 12K

R107 R207 A10266-6831 68K

R108 R208 A10266-8211 820

R109 R209 A10266-6801 68

R110 R210 A10266-6831 68K

R111 R211 A10266-1231 12K

R112 R212 A10266-5131 51K

R113 R213 A10266-4721 4.7K

R114 R214 A10266-4721 4.7K

R115 R215 A10266-5141 510K

R116 R216 A10266-2751 2.7M

R117 R217 A10266-4731 47K

R118 R218 A10266-2711 270

R119 R219 A10266-3911 390

R120 R220 A10266-2711 270

R121 R221 C 5062-2 100K Pot (-ODEP)

R122 R222 A10266-2741 270K

R123 R223 A10266-2032 20K .5W

R124 R224 A10266-6821 6.8K

R125 R225 C 7782-3

R126 R226 C 7782-3

100 Flame Proof

100 Flame Proof

R127 R227 A10266-6821 6.8K

R128 R228 A10266-1031 10K

R129 R229 A10266-1041 100K

R130 R230 A10266-1041 100K

Q43010-0 Main Module (D 7911-7 board) Parts List

R131 R231 A10266-1031 10K

R132 R232 C 5062-2 100K Pot (+ODEP)

R133 R233 A10266-2741 270K

R134 R234 A10266-2032 20K .5W

R135 R235 C 7782-3 100 Flame Proof

R136 R236 A10266-6821 6.8K

R137 R237 C 7782-3 100 Flame Proof

R138 R238 A10266-6821 6.8K

R139 R239 A10266-8211 820

R140 R240 A10266-6801 68

R141 R241 A10266-1541 150K

R142 R242 A10266-1541 150K

R143 R243 A10266-1041 100K

R144 R244 A10266-1041 100K

R145 R245 A10266-1851 1.8M

R146 R246 A10266-1031 10K

R147 R247 C 7781-5 200 .5W FP

R148 R248 A10266-2721 2.7K

R149 R249 C 7781-5 200 .5W FP

R150 R250 A10266-2721 2.7K

R151 R251 A10266-1031 10K

R152 R252 A10266-1231 12K

R153 R253 JUMPER A10124-24

R154 R254 A10265-12131 121K 1%

R155 R255 A10266-1321 1.3K

R156 R256 A10266-1321 1.3K

R157 R257 A10266-1321 1.3K

R158 R258 A10266-9121 9.1K

R159 R259 A10266-1021 1K

R160 R260 A10266-10021 10K 1%

R161 R261 A10266-4701 47

R162 R262 A10266-4701 47

R163 R263 A10265-12131 121K 1%

R164 R264 A10265-10021 10K 1%

R165 R265 A10265-12131 121K 1%

R166 R266 A10266-1851 1.8M

R167 R267 A10265-10011 1K 1%

R168 R268 A10265-95301 953 1%

R170 R270 A10265-10011 1K 1%

R171 R271 A10265-95301 953 1%

R173 R273 A10265-10021 10K 1%

R174 R274 A10265-24921 24.9K 1%

R175 R275 A10265-76811 7.68K 1%

R176 R276 A10265-24921 24.9K 1%

R177 R277 A10265-69811 6.98K 1%

R179 R279 A10266-1321 1.3K

R180 R280 A10266-4711 470

R181 R281 A10266-4721 4.7K

R182 R282 A10266-2201 22

R183 R283 A10266-2421 2.4K

R184 R284 A10266-4741 470K

R185 R285 A10266-2421 2.4K

36

Com-Tech 1600 Amplifier Service Manual

Q43010-0 Main Module (D 7911-7 board) Parts List

R186 R286 A10266-2751 2.7M

R187 R287 A10266-3631 36K

R188 R288 A10266-3631 36K

R189 R289 A10266-2731 27K

R190 R290 A10266-2051 2M

R191 R291 A10266-3331 33K

R192 R292 A10266-1031 10K

R193 R293 A10266-1031 10K

R194 R294 A10266-1041 100K

R195 R295 A10266-3021 3K

R196 R296 A10266-4721 4.7K

R197 R297 A10266-1031 10K

R198 R298 A10266-4721 4.7K

R199 R299 A10266-1031 10K

R906 R1006 OPEN

R907 R1007 OPEN

R908 R1008 OPEN

R909 R1009 A10266-4741 470K

R910 R1010 A10266-4741 470K

R911 R1011 A10266-1521 1.5K

R912 R1012 A10266-4711 470

R913 R1013 A10266-1051 1M

R914 R1014 A10266-1051 1M

R915 R1015 A10266-2201 22

R916 R1016 A10266-2201 22

Switches

S2

S3

S4

OPEN

C 7960-5

C 6781-6

Sensitivity

Switch, St/Mono

IC’s

U1

U2

C 5095-2

C 5096-0

U100 U200 C 6911-9

U101 U201 C 4345-2

U102 U202 C 4345-2

U103 U203 C 6910-1

U104 U204 C 7558-7

UA7815

UA7915

UPA75

LM339

LM339

UPA76

MC33079P

Misc.

Board

Socket

Nut

Heatsink

Washer

D 7993-5

C 3450-1

A10102-5

C 5341-0

Torq Spreader C 6541-4

14 Pin (Qty 6)

Hex 6-32 (Qty 2)

TO-220 (Qty 2)

(Qty 2)

A10096-5 #6, Split (Qty 2)

A10240-0608 Stainless (Qty 2) Screw

J1

J2

J3

C 7593-4

C 4508-5

C 7526-4

J100 J200 OPEN

J500 J800 D 6619-7

J600 J700 D 6620-5

Cable Tie C 1811-6

5 Pin Header

16 Pin Socket

3 Pin Header

10 Inch Ribbon

6 Inch Ribbon

(Qty 4)

37

Com-Tech 1600 Amplifier Service Manual

Q43041-5 Main Module (D 7993-5 board) Parts List

Capacitors

C1

C2

C4

C5

C 4303-1

C 3913-8

C 6802-0

A10124-24

C6

C7

A10124-24

C 8897-8

C100 C200 C 5311-3

C101 C201 C 2821-4

C103 C203 C 6805-3

C104 C204 C 6805-3

C105 C205 C 6812-9

C106 C206 C 6812-9

C107 C207 C 8897-8

C108 C208 C 6814-5

C109 C209 C 7417-6

C110 C210 C 5362-6

C111 C211 C 8897-8

C112 C212 C 8992-7

C113 C213 C 8988-5

C114 C214 C 8854-9

C115 C215 C 8854-9

C116 C216 C 8988-5

C117 C217 C 8992-7

C118 C218 C 6814-5

C119 C219 C 6802-0

C120 C220 C 8897-8

C122 C222 C 6811-1

C123 C223 C 6812-9

C124 C224 C 6812-9

C129 C229 C 6814-5

C130 C230 C 6813-7

C133 C233 C 6813-7

C134 C234 C 6805-3

C135 C235 C 6805-3

C136 C236 C 6808-7

C137 C237 C 6808-7

C138 C238 C 6813-7

C139 C239 C 6813-7

C140 C240 C 6812-9

C141 C241 C 6812-9

C144 C244 C 8576-8

C145 C245 C 6812-9

C146 C246 C 6812-9

C147 C247 C 6806-1

C148 C248 C 6810-3

C149 C249 C 6808-7

C150 C250 C 6806-1

C151 C251 C 6806-1

C152 C252 C 6950-7

C153 C253 C 8897-8

C154 C254 C 8426-6

.47µF

.1µF

100pF

47pF

47pF

12pF

27pF

27pF

.1µF

.56µF

33µF

100µF

100µF

33µF

.56µF

12pF

1000µF

470µF

.47µF

Jumper Wire

Jumper Wire

.1µF

22µF

10pF

.022µF

.022µF

47pF

47pF

.1µF

12pF

.0033µF

2.2µF

100µF

47pF

47pF

.01µF

180pF

470pF

.01µF

.01µF

.022µF

.022µF

470pF

470pF

27pF

27pF

47pF

47pF

82pF 5%

.1µF

.1µF 250V

.1µF

.1µF

.01µF

C155 C255 C 8897-8

C156 C256 C 8897-8

C157 C257 C 6806-1

Diodes

D1

D2

D3

D4

C 2851-1

C 2851-1

C 2851-1

C 2851-1

D5

D6

C 2851-1

C 2851-1

D7 C 2851-1

D108 D208 C 3181-2

D109 D209 C 3181-2

D110 D210 C 3181-2

D111 D211 C 5061-4

D112 D212 C 3181-2

D113 D213 C 3181-2

D114 D214 OPEN

D115 D215 OPEN

D120 D220 C 3181-2

D121 D221 C 3181-2

D122 D222 C 3181-2

D123 D223 C 5061-4

D124 D224 C 3181-2

D125 D225 C 3181-2

D126 D226 C 5061-4

D127 D227 C 5061-4

D128 D228 C 5061-4

D129 D229 C 3181-2

D130 D230 C 3181-2

D131 D231 C 3181-2

D132 D232 C 3181-2

Transistors

Q100 Q200 D 2961-7

Q101 Q201 C 3578-9

Q102 Q202 C 3810-6

Q103 Q203 C 3786-8

Q105 Q205 C 3578-9

Q106 Q206 C 3625-8

Q107 Q207 C 3786-8

Q108 Q208 D 2961-7

Q109 Q209 D 2961-7

Q110 Q210 C 3810-6

Q112 Q212 C 3625-8

Q113 Q213 C 3625-8

Q115 Q215 D 2962-5

Q116 Q216 C 3786-8

Q117 Q217 D 2961-7

Q118 Q218 D 2961-7

Q119 Q219 C 3625-8

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4148

1N4148

1N4148

1N3070

1N4148

1N4148

1N4148

1N4148

1N4148

1N3070

1N4148

1N4148

1N3070

1N3070

1N3070

1N4148

1N4148

1N4148

1N4148

NPN 2N3859A

PNP MPSA93

NPN MPSA43

PNP PN4250

PNP MPSA93

NPN 2N4125

PNP PN4250

NPN 2N3859A

NPN 2N3859A

NPN MPSA43

NPN 2N4125

NPN 2N4125

NPN MPS8097

PNP PN4250

NPN 2N3859A

NPN 2N3859A

NPN 2N4125

38

Com-Tech 1600 Amplifier Service Manual

Q120 Q220 C 3625-8

Q121 Q221 C 7458-0

Q122 Q222 C 7458-0

Q123 Q223 C 7458-0

Q124 Q224 C 3625-8

NPN 2N4125

NPN 2N4123

NPN 2N4123

NPN 2N4123

NPN 2N4125

Resistors (.25W 5% unless

R1

R2

R3

R4

N101 N201 D 7945-5

N102 N202 D 6082-8 noted otherwise)

Resistor Network

Resistor Network

A10265-53621 53.6K 1%

R7

R8

R9

R10

R16

R17

R18

OPEN

OPEN

A10265-46421 46.4K 1%

A10266-1041 100K

A10266-2031

A10266-5121

OPEN

A10266-5121

A10266-1041

R100 R200 C 7409-3

20K

5.1K

5.1K

A10266-2031 20K

100K

5K Linear Pot

R101 R201 A10265-49911 4.99K 1%

R102 R202 A10266-5111 510

R103 R203 A10265-10031 100K 1%

R104 R204 A10266-2721 2.7K

R105 R205 A10266-2721 2.7K

R106 R206 A10266-1231 12K

R107 R207 A10266-6831 68K

R108 R208 A10266-8211 820

R109 R209 A10266-6801 68

R110 R210 A10266-6831 68K

R111 R211 A10266-1231 12K

R112 R212 A10266-5131 51K

R113 R213 A10266-4721 4.7K

R114 R214 A10266-4721 4.7K

R115 R215 A10266-5141 510K

R116 R216 A10266-2751 2.7M

R117 R217 A10266-4731 47K

R118 R218 A10266-2711 270

R119 R219 A10266-3911 390

R120 R220 A10266-2711 270

R121 R221 C 5062-2 100K Pot (-ODEP)

R122 R222 A10266-2741 270K

R123 R223 A10266-2032 20K .5W

R124 R224 A10266-6821 6.8K

R125

R126

R225

R226

C 7782-3

C 7782-3

100 Flame Proof

100 Flame Proof

R127 R227 A10266-6821 6.8K

R128 R228 A10266-1031 10K

R129 R229 A10266-1041 100K

R130 R230 A10266-1041 100K

Q43041-5 Main Module (D 7993-5 board) Parts List

R131 R231 A10266-1031 10K

R132 R232 C 5062-2 100K Pot (+ODEP)

R133 R233 A10266-2741 270K

R134 R234 A10266-2032 20K .5W

R135 R235 C 7782-3 100 Flame Proof

R136 R236 A10266-6821 6.8K

R137 R237 C 7782-3 100 Flame Proof

R138 R238 A10266-6821 6.8K

R139 R239 A10266-8211 820

R140 R240 A10266-6801 68

R141 R241 A10266-1541 150K

R142 R242 A10266-1541 150K

R143 R243 A10266-1041 100K

R144 R244 A10266-1041 100K

R145 R245 A10266-1851 1.8M

R146 R246 A10266-1031 10K

R147 R247 C 7781-5 200 .5W Flame Proof

R148 R248 A10266-2721 2.7K

R149 R249 C 7781-5 200 .5W Flame Proof

R150 R250 A10266-2721 2.7K

R151 R251 A10266-1031 10K

R152 R252 A10265-11821 11.8K 1%

R153 R253 JUMPER

R154 R254 C 8261-7

A10124-24

121K 0.1%

R155 R255 A10266-1321 1.3K

R156 R256 A10266-1321 1.3K

R157 R257 A10266-1321 1.3K

R158 R258 A10265-11321 11.3K 1%

R159 R259 A10266-1021 1K

R160 R260 C 8260-9 10K 0.1%

R161 R261 A10266-4701 47

R162 R262 A10266-4701 47

R163 R263 C 8261-7

R164 R264 C 8260-9

R165 R265 C 8261-7

121K 0.1%

10K 0.1%

121K 0.1%

R166 R266 A10266-1851 1.8M

R167 R267 A10265-10011 1K 1%

R168 R268 A10265-97601 976 1%

R170 R270 A10265-10011 1K 1%

R171 R271 A10265-95301 953 1%

R173 R273 C 8260-9 10K 0.1%

R174 R274 A10265-24921 24.9K 1%

R175 R275 A10265-76811 7.68K 1%

R176 R276 A10265-24921 24.9K 1%

R177 R277 A10265-69811 6.98K 1%

R179 R279 A10266-1321 1.3K

R180 R280 A10266-4711 470

R181 R281 A10266-4721 4.7K

R182 R282 A10266-2201 22

R183 R283 A10266-2421 2.4K

R184 R284 A10266-4741 470K

R185 R285 A10266-2421 2.4K

39

Com-Tech 1600 Amplifier Service Manual

Q43041-5 Main Module (D 7993-5 board) Parts List

R186 R286 A10266-2751 2.7M

R187 R287 A10266-3631 36K

R188 R288 A10266-3631 36K

R189 R289 A10266-2731 27K

R190 R290 A10266-2051 2M

R191 R291 A10266-3331 33K

R192 R292 A10266-1031 10K

R193 R293 A10266-1031 10K

R194 R294 A10266-1041 100K

R195 R295 A10266-3021 3K

R196 R296 A10266-4721 4.7K

R197 R297 A10266-1031 10K

R198 R298 A10266-4721 4.7K

R199 R299 A10266-1031 10K

R906 R1006 OPEN

R907 R1007 OPEN

R908 R1008 OPEN

R909 R1009 A10266-4741 470K

R910 R1010 A10266-4741 470K

R911 R1011 A10266-1521 1.5K

R912 R1012 A10266-4711 470

R913 R1013 A10266-1051 1M

R914 R1014 A10266-1051 1M

R915 R1015 A10266-2201 22

R916 R1016 A10266-2201 22

R917 R1017 A10265-10021 10K 1%

R918 R1018 A10265-10021 10K 1%

R919 R1019 A10265-10021 10K 1%

R920 R1020 A10265-10021 10K 1%

R921 R1021 C 9079-2 200 Pot (CMR Null)

Switches

S2

S3

S4

OPEN

C 7960-5

C 6781-6

Sensitivity

Switch, Stereo/Mono

IC’s

U1

U2

C 5095-2

C 5096-0

U100 U200 C 6911-9

U101 U201 C 4345-2

U102 U202 C 4345-2

U103 U203 C 6910-1

U104 U204 C 7558-7

UA7815

UA7915

UPA75

LM339

LM339

UPA76

MC33079P

Misc.

Board

Socket

Nut

Heatsink

Washer

D 7993-5

C 3450-1

A10102-5

C 5341-0

Torq Spreader C 6541-4

14 Pin (Qty 6)

Hex 6-32 (Qty 2)

TO-220 (Qty 2)

(Qty 2)

A10096-5 #6, Split (Qty 2)

A10240-0608 Stainless (Qty 2) Screw

J1

J2

J11

C 7593-4

C 4508-5

C 7526-4

J100 J200 OPEN

J500 J800 D 6619-7

J600 J700 D 6620-5

Cable Tie C 1811-6

5 Pin Header

16 Pin Socket

3 Pin Header

10 Inch Ribbon

6 Inch Ribbon

(Qty 4)

40

Com-Tech 1600 Amplifier Service Manual

Capacitors

C1

C2

C4

C5

C 4303-1

C 3913-8

C 6802-0

A10124-24

C6

C7

A10124-24

C 8897-8

C100 C200 C 5311-3

C101 C201 C 9464-6

C103 C203 C 6805-3

C104 C204 C 6805-3

C105 C205 C 6812-9

C106 C206 C 6812-9

C107 C207 C 8897-8

C108 C208 C 6814-5

C109 C209 C 7417-6

C110 C210 C 5362-6

C111 C211 C 8897-8

C112 C212 C 8992-7

C113 C213 C 8988-5

C114 C214 C 8854-9

C115 C215 C 8854-9

C116 C216 C 8988-5

C117 C217 C 8992-7

C118 C218 C 6814-5

C119 C219 C 6802-0

C120 C220 C 8897-8

C122 C222 C 6811-1

C123 C223 C 6812-9

C124 C224 C 6812-9

C129 C229 C 6814-5

C130 C230 C 6813-7

C133 C233 C 6813-7

C134 C234 C 6805-3

C135 C235 C 6805-3

C136 C236 C 6808-7

C137 C237 C 6808-7

C138 C238 C 6813-7

C139 C239 C 6813-7

C140 C240 C 6812-9

C141 C241 C 6812-9

C144 C244 C 8576-8

C145 C245 C 6812-9

C146 C246 C 6812-9

C147 C247 C 6806-1

C148 C248 C 6810-3

C149 C249 C 6808-7

C150 C250 C 6806-1

C151 C251 C 6806-1

C152 C252 C 6950-7

C153 C253 C 8897-8

C154 C254 C 8426-6

Q43131-4 Main Module (D8283-0 board) Parts List

.47µF

.1µF

100pF

47pF

47pF

12pF

27pF

27pF

.1µF

.56µF

33µF

100µF

100µF

33µF

.56µF

12pF

1000µF

470µF

.47µF

Jumper Wire

Jumper Wire

.1µF

22µF

10pF

.022µF

.022µF

47pF

47pF

.1µF

12pF

.0033µF

2.2µF

100µF

47pF

47pF

.01µF

180pF

470pF

.01µF

.01µF

.022µF

.022µF

470pF

470pF

27pF

27pF

47pF

47pF

82pF 5%

.1µF

.1µF 250V

.1µF

.1µF

.01µF

.001µF

.001µF

100pF

100pF

C155 C255 C 8897-8

C156 C256 C 8897-8

C157 C257 C 6806-1

C158 C258 C 6807-9

C159 C259 C 6807-9

C160 C260 C 6811-1

C161 C261 C 6811-1

Diodes

D1

D2

D3

D4

C 2851-1

C 2851-1

C 2851-1

C 2851-1

D5

D6

C 2851-1

C 2851-1

D7 C 2851-1

D108 D208 C 3181-2

D109 D209 C 3181-2

D110 D210 C 3181-2

D111 D211 C 5061-4

D112 D212 C 3181-2

D113 D213 C 3181-2

D114 D214 C 3181-2

D115 D215 C 3181-2

D120 D220 C 3181-2

D121 D221 C 3181-2

D122 D222 C 3181-2

D123 D223 C 5061-4

D124 D224 C 3181-2

D125 D225 C 3181-2

D126 D226 C 5061-4

D127 D227 C 5061-4

D128 D228 C 5061-4

D129 D229 C 3181-2

D130 D230 C 3181-2

D131 D231 C 3181-2

D132 D232 C 3181-2

D133 D233 C 3181-2

D134 D234 C 3181-2

Transistors

Q100 Q200 D 2961-7

Q101 Q201 C 3578-9

Q102 Q202 C 3810-6

Q103 Q203 C 3786-8

Q105 Q205 C 3578-9

Q106 Q206 C 3625-8

Q107 Q207 C 3786-8

Q108 Q208 C 5891-4

Q109 Q209 D 2961-7

Q110 Q210 C 3810-6

Q112 Q212 C 3625-8

1N4148

1N4148

1N3070

1N4148

1N4148

1N3070

1N3070

1N3070

1N4148

1N4148

1N4148

1N4148

1N4148

1N4148

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4148

1N4148

1N4148

1N3070

1N4148

1N4148

1N4148

1N4148

1N4148

NPN 2N3859A

PNP MPSA93

NPN MPSA43

PNP PN4250

PNP MPSA93

NPN 2N4125

PNP PN4250

NPN MTS105

NPN 2N3859A

NPN MPSA43

NPN 2N4125

41

Com-Tech 1600 Amplifier Service Manual

Q113 Q213 C 3625-8

Q115 Q215 D 2962-5

Q116 Q216 C 3786-8

Q117 Q217 D 2961-7

Q118 Q218 D 2961-7

Q119 Q219 C 3625-8

Q120 Q220 C 3625-8

Q121 Q221 C 7458-0

Q122 Q222 C 7458-0

Q123 Q223 C 7458-0

Q124 Q224 C 3625-8

Q125 Q225 C 3786-8

Q126 Q226 C 5891-4

NPN 2N4125

NPN MPS8097

PNP PN4250

NPN 2N3859A

NPN 2N3859A

NPN 2N4125

NPN 2N4125

NPN 2N4123

NPN 2N4123

NPN 2N4123

NPN 2N4125

PNP PN4250A

NPN MTS105

Resistors

R1

R2

R3

R4

R7

R8

R9

R10

A10265-53621 53.6K 1%

OPEN

OPEN

A10265-46421 46.4K 1%

A10266-1041 100K

A10266-2031 20K

A10266-5121 5.1K

OPEN

R16

R17

A10266-5121 5.1K

A10266-2031 20K

R18 A10266-1041 100K

R100 R200 C 7409-3 5K Linear Pot

R101 R201 A10265-49911 4.99K 1%

R102 R202 A10266-5111 510

R103 R203 A10265-10031 100K 1%

R104 R204 A10266-2721 2.7K

R105 R205 A10266-2721 2.7K

R106 R206 A10266-1231 12K

R107 R207 A10266-6831 68K

R108 R208 A10266-8211 820

R109 R209 A10266-5601 56

R110 R210 A10266-6831 68K

R111 R211 A10266-1231 12K

R112 R212 A10266-5131 51K

R113 R213 A10266-4721 4.7K

R114 R214 A10266-4721 4.7K

R115 R215 A10266-5141 510K

R116 R216 A10266-2751 2.7M

R117 R217 A10266-4731 47K

R118 R218 A10265-27401 274 1%

R119 R219 A10265-66501 665 1%

R120 R220 A10265-28701 287 1%

R121 R221 C 5062-2 100K Pot (-ODEP)

R122 R222 A10266-2741 270K

R123 R223 A10266-2032 20K .5W

R124 R224 A10266-6821 6.8K

R125 R225 C 7782-3 100 Flame Proof

Q43131-4 Main Module (D8283-0 board) Parts List

R126 R226 C 7782-3 100 Flame Proof

R127 R227 A10266-6821 6.8K

R128 R228 A10266-1331 13K

R129 R229 A10266-1041 100K

R130 R230 A10266-1041 100K

R131 R231 A10266-1331 13K

R132 R232 C 5062-2 100K Pot (+ODEP)

R133 R233 A10266-2741 270K

R134 R234 A10266-2032 20K .5W

R135 R235 C 7782-3 100 Flame Proof

R136 R236 A10266-6821 6.8K

R137 R237 C 7782-3 100 Flame Proof

R138 R238 A10266-6821 6.8K

R139 R239 A10266-8211 820

R140 R240 A10266-5601 56

R141 R241 A10266-1541 150K

R142 R242 A10266-1541 150K

R143 R243 A10266-1041 100K

R144 R244 A10266-1041 100K

R145 R245 A10266-2251 2.2M

R146 R246 A10266-1231 12K

R147 R247 C 8836-6 100 .5W Flame Proof

R148 R248 A10266-2721 2.7K

R149 R249 C 8836-6 100 .5W Flame Proof

R150 R250 A10266-2721 2.7K

R151 R251 A10266-1231 12K

R152 R252 A10265-11321 11.3K 1%

R153 R253 JUMPER

R154 R254 C 8261-7

A10124-24

121K 0.1%

R155 R255 A10266-1321 1.3K

R156 R256 A10266-1321 1.3K

R157 R257 A10266-1321 1.3K

R158 R258 A10265-11321 11.3K 1%

R159 R259 A10266-1021 1K

R160 R260 C 8260-9 10K 0.1%

R161 R261 A10266-4701 47

R162 R262 A10266-4701 47

R163 R263 C 8261-7

R164 R264 C 8260-9

R165 R265 C 8261-7

121K 0.1%

10K 0.1%

121K 0.1%

R166 R266 A10266-2251 2.2M

R167 R267 A10265-10011 1K 1%

R168 R268 A10265-10011 1K 1%

R170 R270 A10265-10011 1K 1%

R171 R271 A10265-10011 1K 1%

R173 R273 C 8260-9 10K 0.1%

R174 R274 A10265-24921 24.9K 1%

R175 R275 A10265-76811 7.68K 1%

R176 R276 A10265-24921 24.9K 1%

R177 R277 A10265-69811 6.98K 1%

R179 R279 A10266-1321 1.3K

R180 R280 A10266-4711 470

42

Com-Tech 1600 Amplifier Service Manual

Q43131-4 Main Module (D8283-0 board) Parts List

R181 R281 A10266-4721 4.7K

R182 R282 A10266-2201 22

R183 R283 A10266-2421 2.4K

R184 R284 A10266-4741 470K

R185 R285 A10266-2421 2.4K

R186 R286 A10266-2751 2.7M

R187 R287 A10266-3631 36K

R188 R288 A10266-3631 36K

R189 R289 A10266-2731 27K

R190 R290 A10266-2051 2M

R191 R291 A10266-3331 33K

R192 R292 A10266-1031 10K

R193 R293 A10266-1031 10K

R194 R294 A10266-1041 100K

R195 R295 A10266-3021 3K

R196 R296 A10266-4721 4.7K

R197 R297 A10266-1031 10K

R198 R298 A10266-4721 4.7K

R199 R299 A10266-1031 10K

R906 R1006 OPEN

R907 R1007 OPEN

R908 R1008 OPEN

R909 R1009 A10266-4741 470K

R910 R1010 A10266-4741 470K

R911 R1011 A10266-1521 1.5K

R912 R1012 A10266-4711 470

R913 R1013 A10266-1051 1M

R914 R1014 A10266-1051 1M

R915 R1015 A10266-2201 22

R916 R1016 A10266-2201 22

R917 R1017 A10265-10021 10K 1%

R918 R1018 A10265-10021 10K 1%

R919 R1019 A10265-10021 10K 1%

R920 R1020 A10265-10021 10K 1%

R921 R1021 C 9079-2 200 Pot (CMR Null)

R922 R1022 A10265-66501 665 1%

R923 R1023 A10265-35711 3.57K 1%

R924 R1024 A10265-66501 665 1%

R925 R1025 A10265-10031 100K 1%

R926 R1026 A10265-66501 665 1%

R927 R1027 A10265-10031 100K 1%

R928 R1028 A10265-35711 3.57K 1%

R929 R1029 A10266-7531 75K

R930 R1030 A10266-7531 75K

Resistor Networks

N101 N201 D 7945-5

N102 N202 D 6082-8

Resistor Network

Resistor Network

Switches

S2

S3

S4

OPEN

C 7960-5

C 6781-6

Integrated Circuits

U1

U2

C 5095-2

C 5096-0

U100 U200 C 6911-9

U101 U201 C 4345-2

U102 U202 C 4345-2

U103 U203 C 6910-1

U104 U204 C 7558-7

Sensitivity

Switch, Stereo/Mono

UA7815

UA7915

UPA75

LM339

LM339

UPA76

MC33079P

Misc.

Board

Socket

Nut

Heatsink

Washer

D 8283-0

C 3450-1

A10102-5

C 5341-0

Tq Spreader C 6541-4

14 Pin (Qty 6)

Hex 6-32 (Qty 2)

TO-220 (Qty 2)

Tourque Sprdr Qty 2

A10096-5 #6, Split (Qty 2)

A10240-0608 Stainless (Qty 2) Screw

J1

J2

J11

C 7593-4

C 4508-5

C 7526-4

J100 J200 OPEN

J500 J800 D 6619-7

J600 J700 D 6620-5

Cable Tie

TP 1

Spacer

C 1811-6

C 9450-5

C 9225-1

5 Pin Header

16 Pin Socket

3 Pin Header

10 Inch Ribbon

6 Inch Ribbon

(Qty 4)

Header, 6 pin

Plastic (Qty 5)

43

Com-Tech 1600 Amplifier Service Manual

Q43240-3 Main Module (D 8369-7 board) Parts List

Capacitors

C1

C2

C4

C5

C 9859-7

C 9859-7

C 6802-0

A10124-24

C6

C7

A10124-24

C 8897-8

C100 C200 C 5311-3

C101 C201 C 9464-6

C103 C203 C 6805-3

C104 C204 C 6805-3

C105 C205 C 6812-9

C106 C206 C 6812-9

C107 C207 C 8897-8

C108 C208 C 6814-5

C109 C209 C 7417-6

C110 C210 C 5362-6

C111 C211 C 8897-8

C112 C212 C 8992-7

C113 C213 C 8988-5

C114 C214 C 8854-9

C115 C215 C 8854-9

C116 C216 C 8988-5

C117 C217 C 8992-7

C118 C218 C 6814-5

C119 C219 C 6802-0

C120 C220 C 8897-8

C122 C222 C 6811-1

C123 C223 C 6812-9

C124 C224 C 6812-9

C129 C229 C 6814-5

C130 C230 C 6813-7

C133 C233 C 6813-7

C134 C234 C 6805-3

C135 C235 C 6805-3

C136 C236 C 6808-7

C137 C237 C 6808-7

C138 C238 C 6813-7

C139 C239 C 6813-7

C140 C240 C 6812-9

C141 C241 C 6812-9

C144 C244 C 8576-8

C145 C245 C 6812-9

C146 C246 C 6812-9

C147 C247 C 6806-1

C148 C248 C 6810-3

C149 C249 C 6808-7

C150 C250 C 6806-1

C151 C251 C 6806-1

C152 C252 C 6950-7

C153 C253 C 8897-8

C154 C254 A10434-104JD .1µF 250V

.022µF

.022µF

470pF

470pF

27pF

27pF

47pF

47pF

100µF

47pF

47pF

.01µF

180pF

470pF

.01µF

.01µF

82pF 5%

.1µF

.47µF

.1µF

100pF

47pF

47pF

12pF

27pF

27pF

.1µF

.56µF

33µF

100µF

100µF

33µF

.56µF

12pF

1000µF

1000µF

.47µF

Jumper Wire

Jumper Wire

.1µF

22µF

10pF

.022µF

.022µF

47pF

47pF

.1µF

12pF

.0033µF

2.2µF

.1µF

.1µF

.01µF

.001µF

.001µF

100pF

100pF

C155 C255 C 8897-8

C156 C256 C 8897-8

C157 C257 C 6806-1

C158 C258 C 6807-9

C159 C259 C 6807-9

C160 C260 C 6811-1

C161 C261 C 6811-1

Diodes

D1

D2

D3

D4

C 2851-1

C 2851-1

C 2851-1

C 2851-1

D5

D6

C 2851-1

C 2851-1

D7 C 2851-1

D108 D208 C 3181-2

D109 D209 C 3181-2

D110 D210 C 3181-2

D111 D211 C 5061-4

D112 D212 C 3181-2

D113 D213 C 3181-2

D114 D214 C 3181-2

D115 D215 C 3181-2

D120 D220 C 3181-2

D121 D221 C 3181-2

D122 D222 C 3181-2

D123 D223 C 5061-4

D124 D224 C 3181-2

D125 D225 C 3181-2

D126 D226 C 5061-4

D127 D227 C 5061-4

D128 D228 C 5061-4

D129 D229 C 3181-2

D130 D230 C 3181-2

D131 D231 C 3181-2

D132 D232 C 3181-2

D133 D233 C 3181-2

D134 D234 C 3181-2

Transistors

Q100 Q200 D 2961-7

Q101 Q201 C 3578-9

Q102 Q202 C 3810-6

Q103 Q203 C 3786-8

Q105 Q205 C 3578-9

Q106 Q206 C 3625-8

Q107 Q207 C 3786-8

Q108 Q208 C 5891-4

Q109 Q209 D 2961-7

Q110 Q210 C 3810-6

Q112 Q212 C 3625-8

1N4148

1N4148

1N3070

1N4148

1N4148

1N3070

1N3070

1N3070

1N4148

1N4148

1N4148

1N4148

1N4148

1N4148

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4004

1N4148

1N4148

1N4148

1N3070

1N4148

1N4148

1N4148

1N4148

1N4148

NPN SPS8010

PNP MPSA93

NPN MPSA43

PNP PN4250

PNP MPSA93

NPN 2N4125

PNP PN4250

NPN MTS105

NPN SPS8010

NPN MPSA43

NPN 2N4125

44

Com-Tech 1600 Amplifier Service Manual

Q113 Q213 C 3625-8

Q115 Q215 D 2962-5

Q116 Q216 C 3786-8

Q117 Q217 D 2961-7

Q118 Q218 D 2961-7

Q119 Q219 C 3625-8

Q120 Q220 C 3625-8

Q121 Q221 C 7458-0

Q122 Q222 C 7458-0

Q123 Q223 C 7458-0

Q124 Q224 C 3625-8

Q125 Q225 C 3786-8

Q126 Q226 C 5891-4

NPN 2N4125

NPN MPS8097

PNP PN4250

NPN SPS8010

NPN SPS8010

NPN 2N4125

NPN 2N4125

NPN 2N4123

NPN 2N4123

NPN 2N4123

NPN 2N4125

PNP PN4250A

NPN MTS105

Resistors

R1

R2

R3

R4

R7

R8

R9

R10

A10265-53621 53.6K 1%

OPEN

OPEN

A10265-46421 46.4K 1%

A10266-1041 100K

A10266-2031 20K

A10266-5121 5.1K

OPEN

R16

R17

A10266-5121 5.1K

A10266-2031 20K

R18 A10266-1041 100K

R100 R200 C 9785-4 5K Linear W/21 Det.

R101 R201 A10265-49911 4.99K 1%

R102 R202 A10266-5111 510

R103 R203 A10265-10031 100K 1%

R104 R204 A10266-2721 2.7K

R105 R205 A10266-2721 2.7K

R106 R206 A10266-1231 12K

R107 R207 A10266-6831 68K

R108 R208 A10266-8211 820

R109 R209 A10266-5601 56

R110 R210 A10266-6831 68K

R111 R211 A10266-1231 12K

R112 R212 A10266-5131 51K

R113 R213 A10266-4721 4.7K

R114 R214 A10266-4721 4.7K

R115 R215 A10266-3641 360K

R116 R216 A10266-2751 2.7M

R117 R217 A10266-4731 47K

R118 R218 A10265-27401 274 1%

R119 R219 A10265-66501 665 1%

R120 R220 A10265-28701 287 1%

R121 R221 C 5062-2 100K Pot (-ODEP)

R122 R222 A10266-2741 270K

R123 R223 A10266-2032 20K .5W

R124 R224 A10266-6821 6.8K

R125 R225 C 8836-6 100 .5W Flame Proof

Q43240-3 Main Module (D 8369-7 board) Parts List

R126 R226 C 8836-6 100 .5W Flame Proof

R127 R227 A10266-6821 6.8K

R128 R228 A10266-1331 13K

R129 R229 A10266-1041 100K

R130 R230 A10266-1041 100K

R131 R231 A10266-1331 13K

R132 R232 C 5062-2 100K Pot (+ODEP)

R133 R233 A10266-2741 270K

R134 R234 A10266-2032 20K .5W

R135 R235 C 8836-6 100 .5W Flame Proof

R136 R236 A10266-6821 6.8K

R137 R237 C 8836-6 100 .5W Flame Proof

R138 R238 A10266-6821 6.8K

R139 R239 A10266-8211 820

R140 R240 A10266-5601 56

R141 R241 A10266-1541 150K

R142 R242 A10266-1541 150K

R143 R243 A10266-1041 100K

R144 R244 A10266-1041 100K

R145 R245 A10266-3351 3.3M

R146 R246 A10266-1231 12K

R147 R247 C 8836-6 100 .5W Flame Proof

R148 R248 A10266-2721 2.7K

R149 R249 C 8836-6 100 .5W Flame Proof

R150 R250 A10266-2721 2.7K

R151 R251 A10266-1231 12K

R152 R252 A10265-11321 11.3K 1%

R153 R253 JUMPER

R154 R254 C 8261-7

A10124-24

121K 0.1%

R155 R255 A10266-1321 1.3K

R156 R256 A10266-1321 1.3K

R157 R257 A10266-1321 1.3K

R158 R258 A10265-11321 11.3K 1%

R159 R259 A10266-1021 1K

R160 R260 C 8260-9 10K 0.1%

R161 R261 A10266-4701 47

R162 R262 A10266-4701 47

R163 R263 C 8261-7

R164 R264 C 8260-9

R165 R265 C 8261-7

121K 0.1%

10K 0.1%

121K 0.1%

R166 R266 A10266-2251 3.3M

R167 R267 A10265-10011 1K 1%

R168 R268 A10265-10011 1K 1%

R170 R270 A10265-10011 1K 1%

R171 R271 A10265-10011 1K 1%

R173 R273 C 8260-9 10K 0.1%

R174 R274 A10265-24921 24.9K 1%

R175 R275 A10265-76811 7.68K 1%

R176 R276 A10265-24921 24.9K 1%

R177 R277 A10265-69811 6.98K 1%

R178 R278 A10266-2021 2K

R179 R279 A10266-1321 1.3K

45

Com-Tech 1600 Amplifier Service Manual

Q43240-3 Main Module (D 8369-7 board) Parts List

R180 R280 A10266-4711 470

R181 R281 A10266-4721 4.7K

R182 R282 A10266-2201 22

R183 R283 A10266-2421 2.4K

R184 R284 A10266-4741 470K

R185 R285 A10266-2421 2.4K

R186 R286 A10266-2751 2.7M

R187 R287 A10266-3631 36K

R188 R288 A10266-3631 36K

R189 R289 A10266-2731 27K

R190 R290 A10266-2051 2M

R191 R291 A10266-1831 18K

R192 R292 A10266-6221 6.2K

R193 R293 A10266-6221 6.2K

R194 R294 A10266-1041 100K

R195 R295 A10266-3021 3K

R196 R296 A10266-4721 4.7K

R197 R297 A10266-1031 10K

R198 R298 A10266-4721 4.7K

R199 R299 A10266-1031 10K

R300 R400 A10266-1041 100K

R301 R401 A10266-1041 100K

R906 R1006 OPEN

R907 R1007 OPEN

R908 R1008 OPEN

R909 R1009 A10266-4741 470K

R910 R1010 A10266-4741 470K

R911 R1011 A10266-1521 1.5K

R912 R1012 A10266-4711 470

R913 R1013 A10266-1051 1M

R914 R1014 A10266-1051 1M

R915 R1015 A10266-2201 22

R916 R1016 A10266-2201 22

R917 R1017 A10265-10021 10K 1%

R918 R1018 A10265-10021 10K 1%

R919 R1019 A10265-10021 10K 1%

R920 R1020 A10265-10021 10K 1%

R921 R1021 C 9079-2 200 Pot (CMR Null)

R922 R1022 A10265-66501 665 1%

R923 R1023 A10265-35711 3.57K 1%

R924 R1024 A10265-66501 665 1%

R925 R1025 A10265-10031 100K 1%

R926 R1026 A10265-66501 665 1%

R927 R1027 A10265-10031 100K 1%

R928 R1028 A10265-35711 3.57K 1%

R929 R1029 A10266-7531 75K

R930 R1030 A10266-7531 75K

Resistor Networks

N101 N201 D 7945-5

N102 N202 D 6082-8

Resistor Network

Resistor Network

Switches

S3

S4

C 7960-5

C 6781-6

Integrated Circuits

U1

U2

C 5095-2

C 5096-0

U100 U200 C 6911-9

U101 U201 C 4345-2

U102 U202 C 4345-2

U103 U203 C 6910-1

U104 U204 C 7558-7

Sensitivity

Switch, Stereo/Mono

UA7815

UA7915

UPA75

LM339

LM339

UPA76

MC33079P

Misc.

Board

Socket

Nut

Heatsink

Washer

D 8369-7

C 3450-1

A10102-5

C 5341-0

Tq Spreader C 6541-4

14 Pin (Qty 6)

Hex 6-32 (Qty 2)

TO-220 (Qty 2)

(Qty 2)

A10096-5 #6, Split (Qty 2)

A10240-0608 Stainless (Qty 2) Screw

J1

J2

J11

C 7593-4

C 4508-5

C 7526-4

J100 J200 OPEN

J500 J800 D 6619-7

J600 J700 D 6620-5

Cable Tie

TP 1

Spacer

C 1811-6

C 9450-5

C 9225-1

5 Pin Header

16 Pin Socket

3 Pin Header

10 Inch Ribbon

6 Inch Ribbon

(Qty 4)

Header, 6 pin RT Ang

Plastic Spcr (Qty 5)

46

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