SERVIC MANUAL

MODEL 7202

SWEEP/FUNCTION GENERATOR

DAGATRONICS CORPORATION

1. PERFORMANCE CHECK PROCEDURE

2. ADJUSTMENT PROCEDURE

3. TROUBLESHOOTING PROCEDURE

4. PARTS LIST

5. CIRCUIT DIAGRAM

6. COMPONENTS LAY-OUT

CONTENTS

1. PERFORMANCE CHECK PROCEDURE l-l. General

This section contains the Procedures required to check and mai ntain specified instrument

Performance. The adjustments should be performed at an ambient

25°C -t2”C and a relative humidity of less than 60%. lt allows this environment for a minimum of 30 minutes.

temperature of the instrument to stabilize at

1-2. Equipment's required

Table l-l is shown test equipment's required.

Table l-l Equipment's required

Remark No Equipment name Specification

1.

Frequency Counter

2.

Oscilloscope

3.

AC Millivolt Meter

7~~ Distortion Analyzer

5. DC Power Supply

6.

Signal Generator

7.

FEEDTHROUGH TERMINATION 50 fi

DC to 60 MHz

DC to 20 MHz

Up to 30 Vrms

I

DC 0 to 1OV

200mHz to 50 MHz

I

1-3. Performance check

1-3-1. OUTPUT FREQUENCY RANGE

SPECIFICATION

0.02 Hz TO 2 MHz

ACCURACY t/- 5 % OF SETTING

EQUIPMENT

FREQUENCY COUNTER

BNC CABLE

FEEDTHROUGH TERMINATION 50 n (if necessary)

PROCEDURE

2. Set 7202 as follows;

- Funct ion ; SINE WAVE (Q)

3

- ATT ; 0 dB(PULL OUT)

- AMPLITUDE; CENTER

- COUNT ; INT(PULL OUT)

- DC OFFSET; OFF(PUSH IN)

- SYM ; OFF(PUSH IN)

- SWEEP ; OFF(PUSH IN)

2. Connect the frequency counter to output terminal.

3. Set the frequency counter to frequency measurement.

4. Set the output frequency of 7202 by FREQUENCY RANGE and DIAL and verify counter frequency reading as follows;

Counter reading

Range

1M

100k

IOk lk

100

10

1

7202 setting

Frequency

2.000 MHz

20.00 kHz

200.0 kHz

2.000 kHz

20.00 kHz

200.0 Hz

2.000 kHz

20.00 Hz

200.0 Hz

2.000 Hz

20.00 Hz

200.0 mHz

2.000 Hz

20.00 mHz

** For reading less than 200 mHz, you tan read by period value.

200mHz ; 5.000 sec

20 mHz ; 50.000 sec l-3-2. AMPLITUDE AND ATTENUATION

SPECIFICATION

Amplitude range

Attenuation

;lOOmVp-p to lOVp-p IN TO 5OQ

;20 dB

ACCURACY

Lower than IOOmVp-p(lN TO 50R) at MIN.

Higher than lOVp-p(lN TO 5OsZ) at MAX.

EQU I PMENT

Oscilloscope

AC Millivoltmeter

BNC CABLE

FEEDTHROUGH TERMINATION 50 R

PROCEDURE

1. Set 7202 as follows;

- Function ; SINE WAVE (s)

- ATT ; 0 dB(PULL OUT)

- AMPLITUDE ; CENTER

- COUNT ; INT(PULL OUT)

- DC OFFSET ; OFF(PUSH IN)

- SYM

- SWEEP

; OFF( PUSH IN)

; OFF( PUSH IN)

2. Connect the oscilloscope through FEEDTHROUGH TERMINATION 50 fi to output terminal.

3. Set Amplitude Control to Min. Position and check the output level is lower than lOOmVp-p(less Sdiv in 20mV/div).

4. Set Amplitude Control lOVp-p(higher than 4div

5. Set Amplitude Control terminal.

to Max. Position and check the output level is higher than in 5V/div).

to Min. Position and connect AC Millivoltmeter to output

6. Set the Range of AC m illivoltmeter to 3V range and adjust Amplitude control for

OdB reading on AC millivoltmeter.

7. Push in “20dB ATT switch” and check the reading of AC Millivoltmeter is -20 dB l-3-3. SINE WAVE CHARACTERISTICS

SPECIFICATION

Total harmonic Distort ion( THD) ; 5 1 % ( IOHz to 100kHz

EQU I PMENT

Distortion analyzer

BNC CABLE

FEEDTHROUGH TERMINATION 50 Q (if necessary)

PROCEDURE

1. Set 7202 as follows;

- Funct ion ; SINE WAVE (/‘u)

- ATT ; 0 dB(PULL OUT)

- AMPLITUDE; CENTER

- COUNT ; INT(PULL OUT)

. - DC OFFSET ; OFF( PUSH IN)

- SYM

- SWEEP

; OFF(PUSH IN)

; OFF(PUSH IN)

2. Connect the distortion analyzer to output terminal.

3. Check the distortions of output Signal are less than 1% from 10Hz to 100kHz.

l-3-4. TRIANGLE/SQUARE WAVE CHARACTERISTICS

SPECIFICATION

Lineari ty of Triangle Wave ; 2 99 % (10Hz to 100kHz)

Rise and Fall Time of Square Wave ; Less than 140nS

EQU I PMENT

Oscilloscope

BNC CABLE

FEEDTHROUGH TERMINATION 50 R (if necessary)

PROCEDURE

1. Set 72 0; 2 as follows;

- Func

- ATT

- AMPL t ion ; TRIANGLE WAVE (/\/)

; 0 dB(PULL OUT)

1’ TUDE ; CENTER

- COUN T ; INT(PULL OUT)

- DC OFFSET ; OFF(PUSH IN

- SYM

- SWEEP

; OFF( PUSH IN

; OFF( PUSH IN

2. Connect the oscilloscope

3. Check the Iinearity of T r to output terminal.

iangle wave from 10Hz to 100kHz.

4. Change the function to “SQUARE WAVE(%)” and check the rise and fall time from

10Hz to 100kHz.

l-3-5. TTL/CMOS OUTPUT

SPECIFICATION

TTL OUTPUT - Rise and Fall Time ; Less than 140nS

- Output Level ; TTL LEVEL (H 2 2.4V , L 5 0.4V)

CMOS OUTPUT - Rise and Fall Time ; Less than 140nS(max. out)

- Output Level ; 4V TO 15V > VARIABLE

EQU I

Ost i

BNC

PMENT

I l oscope

CABLE

PROCEDURE

1. Set 7202 as follows;

- FREQ. RANGE ; 10k

- FREQ. DIAL ; 1OkHz

- COUNT ; INT(PULL OUT)

- DC OFFSET ; OFF( PUSH I N)

- SYM ; OFF( PUSH IN)

- SWEEP ; OFF( PUSH IN)

- TTL/CMOS ; TTL(PUSH IN)

3. Set the oscilloscope to lV/div, SuS/div and connect to TTL/CMOS output terminal.

4. Check the TTL SQUARE WAVE on CRT( Sdiv ).

5. Pull out TTL/CMOS control and adjust from Min. to Max. Position.

6. Check the output level is varied from 4V to 15V.

l-3-5. DC OFFSET CONTROL

SPECIFICATION

MIN. ; lower than -10 V DC (Open circuit)

MAX . ; higher than +lO V DC (Open circuit)

EQU I PMENT

Oscilloscope

BNC CABLE

PROCEDURE

1. Set 7202 as follows;

- Funct ion ; SQUARE (% )

- ATT ; 0 dB( PULL OUT)

- FREQ. RANGE ; 10k

- FREQ. DIAL ; 10kHz

- AMPLITUDE; CENTER

2. Set Oscilloscope to 5V/DIV, IOuS/DIV, DC Coupling and connect to output terminal.

3. Adjust Amplitude Control for 2DIV on CRT.

4. Pull out “DC OFFSET” Control and set to “MIN.” Position and check the DC OFFSET level is lower than -lOV(Lower than -2DIV).

5. Set “DC OFFSET” Control to “MAX.” Position and check the DC OFFSET level is higher than +lOV(Higher than +2DIV).

l-3-6. SYMMETRY CONTROL

SPECIFICATION

MIN. ; lower than 1:lO

MAX . ; higher than 1O:l

EQU I PMENT

Oscilloscope

BNC CABLE

FEEDTHROUGH TERMINATION 50 R ( f necessary

PROCEDURE

1. Set 7202 as follows;

- Funct ion ; SQUARE ( % )

- ATT ; 0 dB( PULL OUT)

- AMPLITUDE; CENTER

- COUNT ; INT(PULL OUT)

- DC OFFSET ; OFF( PUSH I N)

- SYM

- SWEEP

; OFF( PUSH IN)

; OFF( PUSH I N)

2. Connect the oscilloscope to

3. Set the output frequency to

4. Pull out SYM Control and ad rat io) is “lower than 1:lO”.

5. Adjust SYM Control to Max.

than 10: 1”.

output terminal.

20kHz _ ust to Min. Position. And check the symmetry(duty osition and check the symmetry(duty ratio) is”higher l-3-7. SWEEP FUNCTION

SPECIFICATION

Sweep Width ; 1:l to 1OO:l

Sweep Rate ; 0.5Hz to 50Hz(20mS to 2 S)

EQU I PMENT

Oscilloscope

Frequency Counter

BNC CABLE

FEEDTHROUGH TERMINATION 50 IR ( if necessary)

PROCEDURE

1. Set 7202 as follows;

- Funct ion ; SINE WAVE (Q )

- ATT ; 0 dB(PULL OUT)

- AMPLITUDE; CENTER

- COUNT .; INT(PULL OUT)

- DC OFFSET; OFF(PUSH IN)

2.

3.

- SYM ; OFF(PUSH IN)

Connect the oscilloscope and Frequency Counter to output terminal.

Set Freq. Range to 10k and adjust Freq. Dial to 200Hz (Start Frequency).

4. Pull out SWIDTH Control and adjus

5. Adjust Sweep Rate Control for des t to max. Position ( 20kHz, Stop ired rate and check sweep operat frequency).

ing.

l-3-8. VCF IN FUNCTION

SPECIFICATION

Out-put frequency should be changed from minimum frequency to maximum frequency in each frequency range by changing VCF INPUT Voltage from 0 to 1OV DC.

EQU I PMENT

Power supply

BNC CABLE

PROCEDURE

1. Set 7202 as follows;

- Funct ion ; SINE WAVE (Q )

- Frequency Range ; 1 OK

- Frequency Control ; Max.

- ATT ; 0 dB(PULL OUT)

- AMPLITUDE; CENTER

- COUNT ; INT(PULL OUT)

- DC OFFSET ; OFF( PUSH I N)

- SYM ; OFF(PUSH IN)

2. Set Power Supply to “OV” and connect to “VCF IN” Terminal.

3. Check the output frequency is “200Hz f 20Hz”.

4. Increase the output voltage of Power Supply up to +lOV and check the output frequency as following table.

I

VCF Voltage

0

2.000 v

4.000 v

6.000 V

8.000 V

10.00 v

I

Output Frequency

200.0 Hz

4.000 kHz

8.000 kHz

12.00 kHz

16.00 kHz

20.00 kHz

I

Tolerante

+ 20Hz f. 400Hz

+ 800Hz

+ 1 .2 kHz

+ 1 .6 kHz

+ 2.0 kHz

I

9

l-3-9. FREQUENCY COUNTER

SPECIFICATION

Frequency range ; 200mHz to 50MHz

Input sensitivity ; 100mVrms

EQU I PMENT

Signal generator

PROCEDURE

1. Set the CONT to EXT(PUSH IN).

2. Connect the Signal generator to EXT COUNT IN terminal.

3. Set the Signal generator to lOOmVrms, 200mHz and check the reading of 7101.

4. Vary the output frequency from 200mHz to 5OMHz and check the 7202 displays correct frequencies.

2. ADJUSTMENT PROCEDURE

2-l. Preliminary Set-up

Remove top cover. Apply power, and allow at least 30 minutes for warm-up.

2-2. Power supply a. Check the voltage in each Position according to table 2-1.

Table 2-l Power supply Outputs

2-4. PRE-ADJUSTMENTS

2-4-l. TRIANGLE WAVE OFFSET, SQUARE & SINE WAVE LEVEL ADJUST

EQU I PMENT

Oscilloscope

BNC CABLE

FEEDTHROUGH TERMINATION 50 !Z2 (if necessary)

10

PROCEDURE

1. Set 7202 as follows;

- Funct ion ; TRI ANGLE WAVE ( +/ )

- ATT ; 20 dB( PUSH IN)

- AMPLITUDE; MIN.

- FREQUENCY ; 1OkHz

- COUNT ;

- DC OFFSET ;

I NT( PULL OUT)

OFF( PUSH I N)

- SYM ;

2. Set the oscil

OFF( PUSH IN) loscope to 0.5V/DIV, SuS/DIV , DC Coupling and set the vertical

Position to horizontal graticule Center.

3. Connect the oscilloscope to output terminal.

4. Set “AMPLITUDE” control for 2DIV on CRT and adjust SFR14(0FFSET ADJUSTER) for “0

OFFSET of waveform”(The waveform should be in Center. t/- 1DIV from horizontal graticule Center).

5. Change the function to ‘SQUARE WAVE ( % )” and adjust SFR9 for d isplaying

“2DIV(* 1DIV from horizontal graticule Center)” on CRT.

6. Change the function to “SINE WAVE (Q )” and adjust SFRlO ,

“2DIV” on CRT. (SFRIO : + IDIV from horizontal graticule Center

SFR13 for disp for up-side of laying waveform , SFR13 : - 1DIV from horizontal graticule Center for down-side of waveform)

2-4-2. SINE WAVE DISTORTION ADJUST

EQU I PMENT

Distortion Analyzer

BNC CABLE

FEEDTHROUGH TERMINATION 50 st (if necessary)

PROCEDURE

1. Set 7202 as follows;

- Funct ion ; SINE WAVE (\)

- ATT ; 20 dB(PUSH IN)

- AMPLITUDE; Max.

- FREQUENCY ; 1OkHz

2. Connect Distortion analyzer to Output termina

3. Adjust SFR8, SFRll, SFR12 for minimum distort

(less than 0.5 %)

I .

ion read ng on Distortion analyzer.

2-4-3. AMPLITUDE CONTROL AND ATTENUATOR CHECK

EQU I PMENT

Oscilloscope

AC Millivoltmeter

BNC CABLE

11

FEEDTHROUGH TERMINATION 50 fi

PROCEDURE

1. Set 7202 as follows ;

- Funct ion ; SINE WAVE (/L )

- ATT ; 0 dB(PULL OUT)

- AMPLITUDE; CENTER

- COUNT ; INT(PULL OUT)

- DC OFFSET ; OFF( PUSH I N)

- SYM ; OFF(PUSH IN)

- SWEEP ; OFF(PUSH IN)

2. Connect the oscilloscope through FEEDTHROUGH TERMINATION 50 fi to output terminal.

3. Set Amplitude Control to Min. Position and check the output level is lower than lOOmVp-p(less 5div in 20mV/div).

4. Set Amplitude Control to Max. Position and check the output level is higher than lOVp-p(higher than 4div in 5V/div).

5. Set Amplitude Control to Min. Position and connect AC Millivoltmeter to output terminal.

6. Set the Range of AC millivoltmeter to 3V range and adjust Amplitude control for

OdB reading on AC millivoltmeter.

7. Push in “20dB ATT switch” and check the reading of AC Millivoltmeter is -20 dB.

8. Check the amplitude of TRIANGLE & SQUARE WAVE same as Paragraph 3 to 7.

2-5. FREQUENCY RANGE ADJUSTMENT

EQU I PMENT

Frequency Counter

BNC CABLE

FEEDTHROUGH TERMINATION 50 s2

PROCEDURE

1. Set 7202 as follows;

- Funct ion ; TRI ANGLE WAVE ( % )

- ATT ; 20 dB(PUSH IN)

- AMPL I TUDE ; CENTER

- COUNT ; INT(PULL OUT)

- DC OFFSET ; OFF( PUSH IN)

- SYM ; OFF(PUSH IN)

- SWEEP ; OFF(PUSH IN)

2. Connect the Frequency Counter to Output Terminal.

2. Set Frequency Range to “1M” and Frequency Control(Dial) to MAX. Position.

12

3. Adjust SFRI for 2.100 MHz frequency reading on counter.

4. Change Frequency Range to "100k" and adjust SFR2 for 210.00 kHz frequency reading on counter.

5. Change Frequency Range to “IOk" and adjust SFR3 for 21.000 kHz frequency reading on counter.

6. Change Frequency Range to “lk" and adjust SFR4 for 2.1000 kHz frequency reading on counter.

7. Change Frequency Range to "100" and adjust SFR2 for 210.00 Hz frequency reading on counter

8. Change the frequency range to 10 and 1, and check the frequency reading in each range. (10 : 21.000 Hz , 1 : 2.1000 Hz)

9. After adjustment, check the frequency Control(Dial) at MIN. and MAX. as following table.

Range

1M

100k

10k lk

100

10

1

7202 setting

Frequency Control

MIN.

MAX.

MIN.

MAX.

MIN.

MAX.

MIN.

MAX.

MIN.

MAX.

MIN.

MAX.

MIN.

MAX.

Tolerante

Less than 19 kHz

Higher than 2.1 MHz

Less than 1.9 kHz

Higher than 210 kHz

Less than 190 Hz

Higher than 21 kHz

Less than 19 Hz

Higher than 2.1 kHz

Less than 1.9 Hz

Higher than 200 Hz

Less than 190 mHz

Higher than 21 Hz

Less than 19 mHz

Higher than 2.1 Hz

2-6. SYMMETRY ADJUST

EQUIPMENT

Oscilloscope

BNC CABLE

FEEDTHROUGH TERMINATION 50 n (if necessary)

PROCEDURE

1. Set 7202 as follows;

- Function ; SQUARE ( Q >

- ATT ; 0 dB(PULL OUT)

- AMPLITUDE; CENTER

- COUNT ; INT(PULL OUT)

- DC OFFSET; OFF(PUSH IN)

13

- SYM

- SWEEP

; OFF( PUSH IN)

; OFF( PUSH IN)

2. Connect the oscilloscope to output terminal.

3. Set the output frequency to 20kHz.

4. Pull out SYM Control and adjust to Min. Position. And adjust SFR6 the symmetry(duty ratio) is “lower than 1:lO”.

5. Adjust SYM Control to Max. posi than 1O:l”.

tion and adjust the symmetry(duty ra t io) is”higher

2-7. FREQUENCY COUNTER ADJUST

EQU I PMENT

1OMHz Standard Signal Source

Signal Generator up to 5OMHz

BNC CABLE

FEEDTHROUGH TERMINATION 50 0 (if necessary)

PROCEDURE

1. Set 7202 as follows;

- COUNT ; EXT( PUSH IN)

2. Connect 10MHz Standard Signal to the EXT COUNT IN terminal and adjust TC1 for

10.0000 MHz reading on Counter Display.

3. Set Signal generator to 50MHz, 100mVrms and connect the EXT COUNT IN terminal.

4. Adjust SFRIG for 50.0000 MHz reading on Counter Display. Reduce the output level of Signal Generator Slowly and adjust SFR16 for Minimum input sensitivity(as possible as less than 100mVrms).

5. Change the out frequency of Signal Generator from 50MHz to 200mHz and check the minimum input voltage is less than 100mVrms.

3. Troubleshooting Procedure

3-l. Troubleshooting techniques

3-l-l. Check the function selector and switch setting. Incorrect switch settings tan give a false indication of instrument malfunction. If there is any question about the correct function or Operation, Refer to 7202 OPERATOR’S MANUAL.

3-l-2. Check associated equipment’s

Before proceeding, ensure that any equipment’s used with 7202 is operating correctly and verify that out and input Signals are properly connected and that the interconnecting cables are not defective.

14

3-l-3. Visual Check

Look for broken term inals, damaged components, mount ing Status of components, damaged circuit boards, or o ther clues to the Cause of a mal funct ion.

3-2. Troubleshooting procedure

3-2-l. NO Display

1. Check the “FUSE” and if it is broken, Change to new one with same rating.

2. Check the output voltage of power transformer.

-. 20 to 24 Vac between pin 1 and 2 of CN14, and between pin 2 and 3 of CN14 on main board.

-. 6 to 8 Vac between pin 1 and 2 of CN4, and between pin 2 and 3 of CN4 on main board.

3. Check the DC Power Voltage.

-. +5VDC at Ul5 output

4. Check the frequency at pin 19 of U12. It should be “IOMHz”.

5. Check the connector cable from CN12(main board) to display board.

3-2-2. Triangle Wave Out-put

1. Check the Function switch Operation and select Triangle Wave

2. Check the DC Power Voltage for Generator Circuit.

-. +15VDC at U5 output

-. +5VDC at U6 output

. -5VDC at C27 -

- . -15VDC at U7 ou t Put

-. +21VDC at C20 +

- . -2lVDC at C26’ -

3. Check the waveform at Q7 Emitter. The Triangle Wave should be appeared.

4. If not, check the Operation of Amplifier and Triangle oscillator (Ul A/B/D, U2 A/B,

Q3&4,Q5,Q6,D3,D4,D5,Q7).

5. Check the Range Selector Switch Operation and Frequency Control Volume and Cable connection from VRl to CN2(Main Board).

6. Check the “Amplitude VR” and Cable connection from VR to CN5 on main board.

7. Check the waveform at R62. The Triangle Wave should be appeared.

8. If not, check the Operation of Differentia

9. Check the Attenuator switch(20 dB) and cab

Ampl i f ier(Ql2,Ql3,Ql4,Q15,Ql6).

e connection from CN7 to Output terminal.

3-2-3. Square Wave Out-put

1. Check the Function switch Operation and se ect Square Wave

2. Check the waveform at Dl Anode. The Triangle Wave should be appeared.

3. If not, check the step 3-2-2. 4 and 5.

15

4. Check the waveform at Spin of U3. The Square Wave should be appeared.

5. If not, check the Operation of U3.

6. Check the waveform at R62. The Square Wave should be appeared.

7. If not, check the step 3-2-2. 8 and 9.

3-2-4. Sine Wave Out-put

1. Check the Function switch Operation and select Sine Wave.

2. Check the waveform at Q7 Emitter. The Triangle Wave should be appeared.

3. If not, check the step 3-2-2. 4 and 5.

4. Check the waveform at Qll Collector. The Sine Wave should be appeared.

5. If not, check the Operation of Sine Shaper(Q8,QS,QlO,Qll).

6. Check the waveform at R62. The Sine Wave should be appeared.

7. If not, check the step 3-2-2. 8 and 9.

3-2-5. TTL/CMOS Out-put

1. Check the connection of cable for output terminal and Control Volume.

2. Set to TTL(Push in) and check the waveform at Pin 9 of U3. The Square Wave should be appeared.

3. If not , check the step 3-2-3.

4. Check the waveform at pin 6 of U4. The TTL Leve

5. If not , check the Operation of U4.

6. Set to CMOS(PuII out) and check the waveform at

I Square Wave should be appeared.

pin 8 of U4. The TTL Level Square Wave should be appeared.

7. Vary the CMOS Level control and check the CMOS level is varied from 5V to 15V at TTL/CMOS output terminal.

8. If not, check the R82 and cable connection.

3-2-6. Sweep Operation(Width and Rate)

1. Check the cable connection(CN8,CNS) for Width and Rate Control Volume.

2. Vary the Width volume and check the period of Pulse at pin 14 of U2 is varied.

3. Vary the Rate volume and check the level of Pulse at pin 14 of U2 is varied.

4. If not, check the Operation of U2 C/D , D9 and Q17.

3-2-7. Frequency Range and Frequency Dial

1. Check the cable connection from CN2(Main Board) to Frequency Control Volume.

2. Check the Operation of Range selector switch(Key Switch Operation).

3-2-8. Attenuator(20dB)

1. Check the Operation of each Attenuator switch.

2. If not working, check the R63,R64,R65.

16

3-2-9. Frequency Counter(lNT/EXT)

1. Check the INT/EXT selector switch Operation and set to INT.

2. Check the output frequency at Output terminal by using Frequency counter and check the frequency at R83 is same with output frequency.

3. Check the frequency of reference Signal at pinl8 and 19 of U12. It should be “10.000MHz”.

4. If not, check Reference Oscillator(Xl,Tl,C54,C57).

5. Check the frequency at pin3 of U9. lt should be same as output frequency.

6. If not, check the operat ion of Input Ampl if ier(Ql8,Ql9,U8,Q20,Q21).

7. Check the cable connection between CN12(main board) and CN13(Display Board).

8. Check the Operation of Display Controller(U13,U14,Q22-28) on Display Board.

4. PARTS LIST

Table 4-l is shown Parts Iist.

5. CIRCUIT DIAGRAM

Fig. 5-1 is shown Circuit diagram.

6. COMPONENTS LAY-OUT

Fig. 6-l is shown Components lay-out of main board and front board.

17

TABLE 4-l PARTS LIST

1

1. MAIN BOARD

NO PART NAME

IC

2 IC

3 1 IC

SPECIFICATION

MC10116

GAL 16V8

( 74HC393

UNIT Q’TY

EA 1 U8

REF.NUMBER

EA 1 U9

1 EA ) 2 1 UlO,ll

4 IIC

5

1 IC

6 IIC

7 IIC

8 IIC

9 IC

10 IC

11 IC

12 IC

13 FET

14

15

TRANSISTOR

TRANSISTOR

I 2981

1 GL324

1 75107AN

I 74soo

7805

7815

7915

7426

K30A-Y

2N3904

2N3906

I

1 EA 1 1 ) Ul2

I I

1 EA 1 1 1 U l 3

1 EA 1 2 1 Ul,2

1 EA 1 1 IU3

I IfiA I 1 Iu4

EA 2 U6,15

EA

EA

EA 1

1

1

EA 2

EA

EA

5

7

U5

U7

U l 6

Q5,6

Q2,4,7,12,13

Q1,3,14,17,19,20,

21

Q8,9,10,11 16 TRANSISTOR 2SC1815GR/C3198 EA 4

17 TRANSISTOR

18 TRANSISTOR

19 TRANSISTOR

20

21

LINE FILTER

X-TAL

2N2219A CAN TYPE EA 1

2N2905A CAN TYPE EA 1

2N5486

5mH

10 MHz

21 DIODE, RECTIFIER 1 N4003

EA

EA

EA

EA

1

1

2

Q15

Q16

Q18

I LI

X I

D12,13

22 DIODE, SWITCHING 1 N4148

23

24 BRIDGE DIODE

25

KEY SWITCH

26 CAP.TRIMER

27 CAP.CERAMIC

28

29

30

ZENER DIODE

CAP.CERAMIC

CAP.CERAMIC

CAP.CERAMIC

3 1 1 CAP.CERAMIC

32 CAP.CERAMIC

33 CAP.STYROL

34

CAP.CERAMIC

5.1v 112w

DFOGM

PBL-12NCC-107T5F

50P (2 READ)

3Opl5OV

39pl5OV

56p/CH TYPE

68p/CH TYPE

( 82pI5OV

13op/5ov

180p/CH TYPE

15op/5ov

EA 11 D1,2,3,4,Wi7,

8,9,10,11

EA 1 ZDI

EA

EA

1

1

BD1

EA 1 Tl

EA 1 c 5 4

EA

EA

1

1

C l 6 c57

EA 1 C l 0

( EA ( 1 1 C9

EA

EA

EA

2

1

1

C38,41

C3

Cl3

REMARK

1

18

58 RES.SEMI-FIXED

59 RES.SEMI-FIXED

60 RES.METAL FILM

61 RES.METAL FILM

62 RES.METAL FILM

63 RES.METAL FILM pl0 IOKB pl0 IOOKB

62 1/4W,F

240 1/4W,F

430 1/4W,F

1 K 1/4W,F

64 RES.METAL FILM

65 RES.METAL FILM

1.76K 1/4W,F

2.2K 1/4W,F

66 RES.METAL FILM

67 RES.METAL FILM

IlK 1/4W,F

211K 1/4W,F

68 RES.CARBON FILM IO 1/4W,J

69 RES.CARBON FILM 22 1/4W,J

EA

EA

EA

EA

EA

EA 2

EA 1

EA 2

EA 2

EA 2

EA 3

EA 5

2

1

2

3

1

SFR6,7,16

SFRI 2

R63,65

R64

R22,24

R20,21

R32

R12,16

R23,25

R13,17

Rl8,44,69

R28,59,60,79,102

19

NO 1 PART NAME

70 1 RES.CARBON FILM

71 1 RES.CARBON FILM

72 RES.CARBON FILM

73 RES.CARBON FILM

74 1 RES.CARBON FILM

77 1 RES.CARBON FILM

78 1 RES.CARBON FILM

79 RES.CARBON FILM

I

80 ) RES.CARBON FILM

83 1 RES.CARBON FILM

84 1 RES.CARBON FILM

85 1 RES.CARBON FILM

93,94,96,97,100,

89 RES.CARBON FILM

90 RES.CARBON FILM

91 RES.CARBON FILM

92 RES.CARBON FILM

93 RES.CARBON FILM

94 RES.CARBON FILM

95 RES.CARBON FILM

96 RES.CARBON FILM

97 RES.CARBON FILM

98 RES.CARBON FILM

99 RES.CARBON FILM

100 RES.CARBON FILM

101 RES.CARBON FILM

102 PCB,MAIN

103 WIRE WITH LUG

104 GND WIRE

105 WAFER

39K 1/4W,J

IOOK 1/4W,J

10 1/2W,J

100 1/2W,J

IK 1/2W,J

EA 1

EA 1

EA 2

EA 2

EA 1

R71

R85

R67,68

R61,62

R58

560 lW,J

GN,l50mm p3 R

1 EA 1 1 1 R66

208xl7Oxl .Gt(DOUBLE 1 EA 1 1 1

1 EA ( 1 ( REAL-MAIN PC6 1

I

GN,250mm p3 R

2P 2.54mm

1 EA 1 1 1 MAIN-TOP CASE 1

EA 3 CN1,7,11

20

I

I

117 SCREW T 3x6 EA 4 HEAT SINK

3

4

5

6

1

2

7

8

2. DISPLAY BOARD

NO PART NAME SPECIFICATION

IC

TR

CAP.,CERAMIC

LED(DISPLAY)

FND(7-seg.)

PCB DISPLAY

74HC138

2SA1015 IA1 266

0.1 uF/SOV

3.5~6 SQUARE TYPE

LTD-4708G

43x83~1 .Gt(DOUBLE)

WAFER 13PIN

RES.CARBON FILM 3.3 1/4W,J

UNIT Q’T

Y

EA

EA

1

EA

EA

7

1

5

EA

EA 1

3

EA

EA

1

6

REF.NUMBER

Ul4

Q22-28 c 5 7

LED1 -5

FNDI ,2,3

CN13

R108-113

3. OTHERS

I

REMARK

5 RES.VARIABLE

6

7

8

RES.VARIABLE

SHIELD CABLE

SHIELD CABLE

9 SHIELD CABLE

10 SHIELD CABLE

11 WIRE ASS’Y

12 WIRE ASS’Y

13 WIRE ASS’Y

VI 6L415KCB2K EA 1

VI~L~(~X~)N.I~KCB~OK

1 P SHIELD 1 OOmm

1 P SHIELD 120mm

2P SHIELD 120mm

EA

EA

EA 1

EA 1

5P(2P SHx2W) 170mm EA 1

3P(120mm) EA 3

4P(120mm)

4P( 150mm)

EA

EA 1

1

1

2

VR3

VR2

BNC

VCF IN

AMP.VR

BNC,VR

FRQ.,SWEEP

TTL. , SYM

DC OFFSET

AMP.

SYMM.

CN7,ll

CNI

CN5

CNlO

CN2,8,9

CN3

CN6

21

NO PART NAME

14 WIRE ASS’Y

SPECIFICATION

13P 160mm

15 WIRE ASS’Y 3P 200mm

16 LEAD WlRE(T/S) RED 300mm DIW

17 LEAD WIRE

18 1 LEADWIRE

19 GND WIRE

15mm

I

60mm DIW

GIY, 80mm p3 R

20 POWER TRANS 48mm,24-0-24 , 8-O-8

21 1 AC INLET

22 FUSE

23 CONNECTOR

24 1 GND TERMIAL

25 HEAT TUBE

26 HEAT TUBE

1 SS-7B UL,VDE

250V 0.2A

BNC-RB

1 p9x13.5mm

~5.0 , 15 mm

~15.0 ,40 mm

27 1 HEATTUBE 1 ~30.0 ,40 mm

28 1 SHEILD PLATE ( 248x172x0.2t

29 1 FRONT CHASSI 1 211.6x73.6x1.2t

30 REAR CHASSI 185x75x1.3t

31 BRACKET

32 FRONT PLATE

33 REAR PLATE

5.75x15

208x7OxO. 3t

185x75x0.3t

34 ACRYLIC FILTER 82x31x2t

35 FRONT PANEL 221.5x84x3.5t, ABS

36 TOP CASE

37 BOTTOM CASE

38 HANDLE

219x231 x40, ABS

219x231 x40, ABS

234x105~58, ABS

39 KNOB(P/P)

40 KNOB(VR)

41 KNOB(VR)

9.6x9x10, ABS

22~16.5, ABS

13~10.2, ABS

42 INSERT

43 RUBBER FOOT

44 RUBBER FOOT

45 1 SCREW

10x6

32x8.5t

37x8.5t

1 M 3x6 NI-PL

UNIT Q’TY REF.NUMBER

EA 1

EA 1

EA 2

EA 4

POWER SNV

REMARK

CN12

CN15

EA 1

EA 1

INLET-REAR

REAR PANEL

1 EA 1 1 ( REAR PANEL 1

EA 1 AC INLET

EA 4

1 EA 1 1 1

EA 2

EA 1

FRONT PANEL

POWER SiW

FUSE

HOLDER

1 EA 1 1 1 AC INLET

1 EA 1

2

1

I EA I 1 I

EA 1

EA

EA

I

6

EA

I

EA

EA

EA 1

1

1

EA 1

EA 1

EA

EA

EA

13

1

6

EA 4

EA 2

EA 2

1 EA 1 2 1 DISPLAY

22

MAIN BOARD

DISPLAY BOARD

-. _-._-__- ..--_ __. _-_-.-.-_--. ..--. -----

FIG. 6-i COMPONENTS UY-OUT