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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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Table of contents
- 4 Introduction
- 5 Parts Information
- 6 Specifications
- 7 Theory
- 12 Electrical Checkout Procedures
- 16 Parts List (Non Module)
- 19 Module and Schematic Information
- 20 Q42828-6 Control Module Parts List
- 21 Q43213-0 Control Module Parts List
- 22 Q43241-1 Control Module Parts List
- 23 Q42706-4 Display Module Parts List
- 24 Q42758-5 Output Module Parts List
- 25 Q42889-8 Output Module Parts List
- 26 Q42973-0 Output Module Parts List
- 27 Q43051-4 Output Module Parts List
- 28 Q43192-6 Output Module Parts List
- 29 Q42782-5 Main Module Parts List
- 32 Q42919-3 Main Module Parts List
- 35 Q43010-0 Main Module Parts List
- 38 Q43041-5 Main Module Parts List
- 41 Q43131-4 Main Module Parts List
- 44 Q43240-3 Main Module Parts List