Daewoo DV-F882DY-CK, DV-F802DY-CK Schematic

DAEWOO ELECTRONICS CO., LTD.

Service Manual

MODEL : DV-F882DY-C

DV-F882DY-A DV-F882DY-C DV-F882DY-A DV-F882DY-M DV-F882PY-D DV-F802D-CP DV-F802D-AP/ DV-F802P-DP

SPECIFICATIONS

SYSTEM

Video signal PAL standard colour

PAL/SECAM channel memory 55 positions UHF output signal 30-39 CH (adjustable)

73±3dBuV

VIDEO

Input: Video Line in 1.0Vp-p

75 ohms unbalanced, sync.

negative Output: Video line out 75 ohms unbalanced, sync.

negative Signal to noise ratio More than 43dB (SP) Horizontal resolution 230 lines

AUDIO

Input: Audio Line in Impedance: more than

50Kohm

–8 dBm, unbalanced Output: Audio line out Impedance: less than 1Kohm

–6 dBm, unbalanced

Frequency response 100 Hz-8KHz

Hi-Fi, 20Hz-20kHz

Signal to noise ratio More than 38 dB

Hi-Fi More than 60dB

Audio Distortion Less than 3% (SP)

Hi-Fi Less than 0.5%

TAPE TRANSPOR T

Tape width 12.65mm (1/2") Tape speed 23.39mm/sec Maximum recording time 360 min, with E-180 tape (LP) FF. REW time Approx 4 min (E-180)

GENERAL

Power requirements AC 230V 50Hz Power consumption 19W

Nicam 20W

DIMENSIONS

Set size (WxHxD) 360x90x312 mm Carton size (WxHxD) 445x180x412 mm Weight (gross) 5.4Kg

Channel coverage

SYSTEM PAL,SECAM-B/G

PAL,SECAM-B/G,D/K PAL-I HYPER BAND

VHF Ch 2~12 UHF Ch 21~69

Channel CATV Ch X,Y,Z UHF Ch 21~69

SI~S41

IN/OUTPUT JACK TYPE

Model EUROPE

JACK

SCART Type

TYPE

• Safety Check after Servicing

Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions. Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards.

1. Insulation resistance test

Confirm the specified insulation resistance or greater between power cord plug prongs and externally exposed parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). See table below.

2. Dielectric strength test

Confirm specified dielectric strength or greater between power cord plug prongs and exposed accessible parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.) See table below.

3. Clearance distance

When replacing primary circuit components, confirm specified clearance distance (d), (d') between soldered terminals, and between terminals and surrounding metalic parts. See table below.

Table 1: Rating for selected areas

* Class II model only.

Note: This table is unofficial and for reference only. Be sure to confirm the precise values for your particular country and

locality.

4. Leakage current test

Confirm specified or lower leakage current between B (earth ground, power cord plug prongs) and externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.)

Measuring Method: (Power ON) Insert load Z between B (earth ground, power cord plug prongs) and exposed accesible parts. Use and AC voltmeter to measure across both terminals of load Z. See figure 2 and following table.

Table 2: Leakage current ratings for selected areas

Note: This table is unofficial and for reference only. Be sure to confirm the precise values for your particular country and

locality.

Fig. 2

AC Line Voltage Region

Insulation Dielectric Clearance

Resistance Strength Distance (d), (d')

100V Japan ≥ 1 MΩ/500 VDC 1kV AC 1 minute ≥ 3 mm

110 to 130V

USA &

– – –

900V AC 1 minute ≥ 3.2mm

Canada

* 110 to 130 V Europe ≥ 4 MΩ/500 V DC 3 kV AC 1 minute ≥ 6 mm (d)

200 to 240 V Australia ≥ 8 mm (d')

(a: Power cord)

AC Line Voltage Region

Earth Ground

Load Z Leakage Current (i)

(B) to:

100V Japan ¡ ≤ 1m A rms

Exposed accessible

parts

110 to 130 V USA & ¡ ≤ 0.5 m A rms Exposed accessible

parts

¡ ≤ 0.7 m A peak Antenna earth

110 to 130 V Europe ¡ ≤ 2 m A dc terminals 200 to 240 V Australia ¡ ≤ 0.7 m A peak

Other terminals

¡ ≤ 2 m A dc

Fig. 1

1.5k

1.5kµF

50k

Primary circuit termimals

Chassis

Exposed accessible part

Earth Ground power cord plug prongsB

AC Voltmter (high impedance)

TABLE OF CONTENTS

SECTION 1. CONTROLS AND FUNCTIONS..........................................................................................................2

SECTION 2. ELECTRICAL ADJUSTMENTS

2-1. SERVO CIRCUIT ADJUSTMENT METHOD..................................................................................................................... 3

2-2. AUDIO CIRCUIT ADJUSTMENT METHOD......................................................................................................................4

2-3. IF MODULE CIRCUIT ADJUSTMENT METHOD..............................................................................................................5

SECTION 3. TROUBLE SHOOTING FLOW CHART

3-1. POWER CIRCUIT.............................................................................................................................................................16

3-2. LOGIC CIRCUIT............................................................................................................. .................................................. 18

3-3. SERVO-SYSCON CIRCUIT.............................................................................................................................................20

3-4. AUDIO CIRCUIRT (NORMAL) .........................................................................................................................................25

3-5. AUDIO CIRCUIT (HI-FI)....................................................................................................................................................27

3-6. VIDEO CIRCUIT ...............................................................................................................................................................29

SECTION 4. CIRCUIT DIAGRAM

4-1. CONNECTION DIAGRAM (DV-F802 SERIES)................................................................................................................39

4-2. CONNECTION DIAGRAM (DV-F882 SERIES)................................................................................................................40

4-3. POWER CIRCUIT.............................................................................................................................................................41

4-4. SERVO-LOGIC CIRCUIT.................................................................................................................................................42

4-5. LOGIC CIRCUIT (DV-F802 SERIES)...............................................................................................................................43

4-6. LOGIC CIRCUIT II (DV-F882 SERIES) ............................................................................................................................44

4-7. HEADAMP CIRCUIT........................................................................................................................................................45

4-8. VIDEO CIRCUIT ...............................................................................................................................................................46

4-9. HI-FI AUDIO CIRCUIT......................................................................................................................................................47

4-10. PIF NICAM CIRCUIT......................................................................................................................................................48

4-11. PIF/MPX CIRCUIT..........................................................................................................................................................49

4-12. PIF CIRCUIT...................................................................................................................................................................50

4-13. OSD CIRCUIT ................................................................................................................................................................51

4-14. VPS/PDC CIRCUIT........................................................................................................................................................52

4-15. IN/OUT SW CIRCUIT I...................................................................................................................................................53

4-16. IN/OUT SW CIRCUIT II..................................................................................................................................................54

4-17.REMOCON CIRCUIT......................................................................................................................................................55

SECTION 5. VOLT AGE CHAR TS.................................................................................................................................56

SECTION 6. COMPONENTS LOCA TION GUIDE ON PCB BOTTOM VIEW........................................64

SECTION 7. DIS ASSEMBLY ........................................................................................................................................69

SECTION 8. ELECTRICAL P AR TS LIST..................................................................................................................73

SECTION 1. CONTROLS AND FUNCTIONS

PLAY

STOP

POWER

EJECT

REC/OTR

REW

POWER

EJECT

REC/OTR

REW

PLAY

STOP

VIDEO L –AUDIO– R

CHANNEL

B.L.U.E D.I.A.M.O.N.D

RAPID REWIND SYSTEM

REC/OTR

POWER EJECT

õ CH.TRK.ö

PLAY

REW F.F

STOP

DV-F882 Series

DV-F802 Series

FRONT

REAR

EURO-AV

RF OUT

CH.H CH.L

TEST

ON OFF

ANT. IN

2-1. SERVO CIRCUIT ADJUSTMENT METHOD

1. PLAYBACK PHASE

• Connection Method

• Adjustment Procedure

1) Play back the test tape.(DP-2)

2) Set the oscilloscope to the CHOP mode. Connect CH1 to the SW PULSE (PT01 PIN ¤Ø).

3) Insert PATH JIG and Press “REC” button on the remote controller.

4) Check the position of the V-sync from the rising edge of the SW pulse.

(Standard: 6.5H±0.5H)

SECTION 2. ELECTRICAL ADJUSTMENT

Adjustment Parts Checking Point Measuring Equipment Mode Test Tape

JPT01

DP-2

Check

PT01 PIN ¤Ø

Oscilloscope Play

Modulator

JPT01

CH-1

OSCILLOSCOPE

CH-2

PT01

TOP VIEW

PATH JIG

2-2. AUDIO CIRCUIT ADJUSTMENT METHOD

1. AUDIO RECORD BIAS

• Connection Method

• Adjustment Procedure

1) Set the TV/LINE to LINE mode.

2) Set the input to open mode

3) Connect the Audio level meter to both TP1 and TP2

4) After inserting a blank tape, record in SP mode.

5) Adjust R290 to obtain 3.0 mVrms.

TOP VIEW

R290

3.0mVrms

+ –

A/CHEAD

TP2 (–)

TP1 (+)

Audio LEVEL METER

S/N: 97P65064HA HEAD AMP PCB

Adjustment Parts Checking Point Measuring Equipment Test Tape Input Signal

R290

A/C Head PCB

Audio level meter Rec None signal

TP1(+), TP2(-)

2-3. IF MODULE CIRCUIT ADJUSTMENT METHOD

2-3-1. P AL B/G 2 CARRIER SYSTEM

1. 32.4MHz TRAP

• Connection Method

• Adjustment Procedure

1) Supply +12V to pin No.1, and GND to Pin No 2. of 102

2) Connect the signal generator output to pin 3 and GND to pin 2 of P102.

3) Connect the oscilloscope to TP1.

4) Adjust L101 until the level of signal becomes minimum.

P102

L104

L105

IC101

L101

TP1

L108

TP2

L103

Z101

TP6 TP7

IC102

TP3

L109

P101

IC103

L110

TP4

minimum

CH-1 Oscilloscope

GND

OUT

PIF PCB (Component Side)

SIGNAL GENERATOR

fc: 32.4 MHz (No modulation) Output Level: 80dBµV (75Ω loaded)

Adjustment Parts Checking Point Measuring Equipment Condition of Adj. Input Signal

L101 TP1

Oscilloscope

EE Mode

Refer to the

Signal Gen followings

2. PIF COIL

• Connection Method

• Adjustment Procedure

1) Supply +12V to pin No.1, and GND to Pin No 2. of 102

2) Connect the signal generator output to pin 3 and GND to pin 2 of P102.

3) Connect the oscilloscope to TP2.

4) Adjust L104 to obtain the minimum DC voltage of TP2.

P102

L104

L105

IC101

L101

TP1

L108

TP2

L103

Z101

TP6 TP7

IC102

TP3

L109

P101

IC103

L110

TP4

CH-1 Oscilloscope

GND

OUT

minimum

PIF PCB (Component Side)

SIGNAL GENERATOR

fc: 38.9MHz Output Level: 80dBµV (75Ω loaded)

Adjustment Parts Checking Point Measuring Equipment Condition of Adj. Input Signal

L104 TP2

Oscilloscope

EE Mode

Refer to the

Signal Gen followings

3. AFT COIL

• Connection Method

• Adjustment Procedure

1) Supply +12V to pin No.1, and GND to Pin No 2. of 102

2) Connect the signal generator output to pin 3 and GND to pin 2 of P102.

3) Connect the Test circuit to pin No. 7 of P102

4) Connect the oscilloscope to “A” point and GND

5) Adjust L105 to obtain 2.3V DC Voltage at the "A" point

P102

L104

L105

IC101

L101

TP1

L108

TP2

L103

Z101

TP6 TP7

IC102

TP3

L109

P101

IC103

L110

TP4

2.3±0.5V

CH-1 Oscilloscope

GND

OUT

PIF PCB (Component Side)

SIGNAL GENERATOR

fc: 38.9MHz, fm: 15.625KHz (30% AM Modulation) Output level: 80dBµV (75Ω loaded)

43kΩ

33kΩ

18kΩ

"A"

Vcc+12V

GND

(Test circuit)

Adjustment Parts Checking Point Measuring Equipment Condition of Adj. Input Signal

L105 “A” point

Oscilloscope

EE Mode

Refer to the

Signal Gen. followings

4. SOUND CARRIER

• Connection Method

• Adjustment Procedure

1) Supply +12V to pin No. 1, and GND to pin No. 2 of P102

Supply +5V to pin No. 3, and GND to pin No. 1 of P101

2) Connect the signal generator output to pin 3 and GND to pin 2 of 102.

3) Connect the oscilloscope to pin NO.15 of IC102.

4) Adjust L108 to obtain the minimum Noise, minimum Level of pin NO.15 of IC102.

P102

L104

L105

IC101

L101

TP1

L108

TP2

L103

Z101

TP6 TP7

IC102

TP3

L109

P101

IC103

L110

TP4

minimum noise level

CH-1 Oscilloscope

GND

OUT

PIF PCB (Component Side)

SIGNAL GENERATOR

fc: 38.9MHz, fm: 15.625KHz (30% AM Modulation) Output level: 80dBµV (75Ω loaded)

Adjustment Parts Checking Point Measuring Equipment Condition of Adj. Input Signal

L190 IC102 #15

Oscilloscope

EE Mode

Refer to the

Signal Gen. followings

5. LEFT, RIGHT SOUND

• Connection Method

• Adjustment Procedure

1) Supply +12V to pin No. 1, and GND to pin No. 2 of P102

Supply +5V to pin No. 3, and GND to pin No. 1 of P101

2) Connect the signal generator output to pin NO.15 of IC102 and GND.

3) Connect the oscilloscope to TP3, TP4.

4) Adjust L109 to obtain the maximum level of TP3.

5) Adjust L110 to obtain the maximum level of TP4.

P102

L104

L105

IC101

L101

TP1

L108

TP2

L103

Z101

TP6 TP7

IC102

TP3

L109

P101

IC103

L110

TP4

CH-1 Oscilloscope CH-2

GND

OUT

LEFT

RIGHT

PIF PCB (Component Side)

SIGNAL GENERATOR

fc: 5.5MHz (LEFT) fm: 1KHz (50KHz FM Modulation)

5.74MHz (RIGHT) Output level: 100dBµV (75Ω loaded)

GND

#15

Adjustment Parts Checking Point Measuring Equipment Condition of Adj. Input Signal

L109 (LEFT) TP3 Oscilloscope

EE Mode

Refer to the

L110 (RIGHT) TP4 Signal Gen. followings

6. RF AGC

• Connection Method

• Adjustment Procedure

1) Turn on the VCR, Tuning CH21 (471.25MHz)

2) Connect the signal generator output to ANT INPUT of RF 102 (Modulator)

3) Connect the oscilloscope to JPT02

4) Adjust R190 to obtain 6.0±0.2V DC.

CH-1 Oscilloscope

MAIN PCB

RF Signal : PAL B/G (Color Bar or 100% white)

CH : 21 CH (471.25MHz)

UHF BAND

RF102

RF101 JPT02

RF103

R190

6.0±0.2V

Input Level : 70±1 dBµV

(75Ω Loaded)

RF OUT PM5418

Modulator ANT IN

Adjustment Parts Checking Point Measuring Equipment Condition of Adj. Input Signal

R190 JPT02

Oscilloscope

EE Mode

Refer to the

PM5418 Gen. followings

2-3-2. P AL B/G, I NICAM SYSTEM

1. PIF COIL (NICAM)

• Connection Method

• Adjustment Procedure

1) Supply +12V DC to Pin No.1, and GND to Pin No 2. of 102

2) Connect the signal generator output to pin 3 and GND to pin 2 of P102.

3) Connect the oscilloscope to TP2.

4) Adjust L104 to obtain the minimum DC voltage of TP2.

97P651111A

P102

P101

TP1

CH-1 Oscilloscope

SIGNAL GENERATOR

GND

OUT

fc: 39.5MHz (I)

38.9MHz (B/G) Output Level: 80dBµV (75Ω loaded)

minimum

R103

L104

L105

Z101

C107

C106

IC101

TP2

C115

TP3

J19

IC102

L108

J12

J13

J15

C181

D101

R163

L112

X102

30 27

D102

C153

C182

C176C178

TP4

J11

J10

IC104

L103

Adjustment Parts Checking Point Measuring Equipment Condition of Adj. Input Signal

L104 TP2

Oscilloscope

EE Mode

Refer to the

Signal Gen. followings

2. AFT COIL

• Connection Method

• Adjustment Procedure

1) Supply +12V DC to Pin No.1, and GND to Pin No 2. of 102

2) Connect the signal generator output to pin 3 and GND to pin 2 of P102.

3) Connect the test circuit to pin No.7 of P102

4) Connect the oscilloscope to “A” point and GND

5) Adjust L105 to obtain 2.3V DC voltage at the "A" point

97P651111A

P102

P101

TP1

SIGNAL GENERATOR

GND

OUT

fc: 39.5MHz (I) fc: 38.9MHz (B/G) fm: 15.625KHz (30% AM MODULATION) Output Level:80 dBµV (75Ω loaded)

2.3±0.5V

R103

L104

L105

Z101

C107

C106

IC101

L103

TP2

C115

TP3

J19

IC102

L108

J14

J12

J13

J15

C181

D101

R163

L112

X102

30 27

D102

C153

C182

C176C178

TP4

J11

J10

IC104

CH-1 Oscilloscope

43kΩ

33kΩ

18kΩ

(Test circuit)

Vcc+12V

GND

"A"

Adjustment Parts Checking Point Measuring Equipment Condition of Adj. Input Signal

L105 “A” point

Oscilloscope

EE Mode

Refer to the

Signal Gen. followings

3. SOUND CARRIER (NICAM)

• Connection Method

• Adjustment Procedure

1) Supply +12V DC to Pin No.1 and GND to pin No. 2 of P102

2) Supply +5V DC to Pin No.3 GND to Pin No. 1 of P101.

3) Connect the signal generator output to pin 3 and GND to pin 2 of p102

4) Connect the oscilloscope to TP3.

5) Adjust L108 to obtain the minimum noise, minimum level of TP3.

97P651111A

P102

P101

TP1

CH-1 Oscilloscope

SIGNAL GENERATOR

GND

OUT

fc: 39.5MHz (I)

38.9MHz (B/G) fm: 15.625KHz (30% AM MODULATION) Output Level:80 dBµV (75Ω loaded)

minimum noise level

R103

L104

L105

Z101

C107

C106

IC101

L103

TP2

C115

J19

IC102

L108

J14

J12

J13

J15

C161

D101

R163

L112

X102

30 27

D102

C155

C182

C176C178

TP4

J11

J10

IC104

TP3

#3#2

Adjustment Parts Checking Point Measuring Equipment Condition of Adj. Input Signal

L108 TP3

Oscilloscope

EE Mode

Refer to the

Signal Gen followings

4. 5.5 (6.0) MHz SOUND

• Connection Method

• Adjustment Procedure

1) Supply +5V DC to Pin No.3 GND to Pin No. 1 of P101.

2) Connect the signal generator output to TP3 and GND to TP1.

3) Connect the oscilloscope to TP4.

4) Adjust L109 to obtain the maximum level of TP4.

97P651111A

P102

P101

TP1

CH-1 Oscilloscope

SIGNAL GENERATOR

GND

OUT

fc: 6.0MHz (I)

5.5MHz (B/G) fm: 1KHz (50kHz FM MODULATION) Output Level: 100dBµV (75Ω loaded)

L109

R103

L104

L105

Z101

C107

C106

IC101

L103

TP2

C115

J19

IC102

L108

J14

J12

J13

J15

C181

D101

R163

L112

X102

30 27

D102

C153

C182

C176C178

TP4

J11

J10

IC104

TP3

Adjustment Parts Checking Point Measuring Equipment Condition of Adj. Input Signal

L109 TP4

Oscilloscope

EE Mode

Refer to the

Signal Gen followings

5. RF AGC

• Connection Method

• Adjustment Procedure

1) Turn on the VCR. Tuning CH21 (471.25MHz)

2) Connect the signal generator output (PM5418 pattern Gen) to ANT INPUT of RF102 (Modulator)

3) Connect the oscilloscope to JPT02

4) Adjust R190 to obtain 6.0±0.2V DC.

CH-1 Oscilloscope

MAIN PCB

RF Signal : PAL B/G (Color Bar or 100% white) CH : 21 CH (471.25MHz) UHF BAND

RF102

RF101 JPT02

RF103

R190

6.0±0.2V

Input Level : 60 dBµV (I) 63 dBµV (B/G) (75 ohm Loaded)

RF OUT PM5418

Modulator ANT IN

Adjustment Parts Checking Point Measuring Equipment Condition of Adj. Input Signal

R190 JPT02

Oscilloscope

EE Mode

Refer to the

PM5418 Gen followings

SECTION 3. TROUBLE SHOOTING FLOW CHAR T

3-1. POWER CIRCUIT

• When change the parts which are out of order, first, remove the power plug from the socket and then discharge the

voltage across between both terminals of C807. (Use an external scores of KΩresistance)

• When check the primary circuit by using the oscilloscopes insulate the oscilloscope surely. (Use the isulating

transformer) and must connect GND into the primary GND), (But there is no connection when check the secondary circuit).

• When change IC801, check FUSE and Cement resistance surely.

Prepare the instrument

connecting the insulating trans.

Check F801 FUSE

Is voltage applied to D801?

Is voltage applied to the both terminals of C807?

Check power module

Check D801, L801 & L802

Check R802

YES

NO output Voltage

A. CHECKING THE PRIMARY CIRCUIT.

No Voltage

output

Is voltage supplied

Via CN11?

The voltage of #1 of

IC11 is 5.7V and stable

The voltage of #1 of IC11

fluctuate

in 4.8V~5.7V

Measure resistance

between GND of CN21

and each terminal

of CN21

The 12DC of each

wire of T11 is ok

Primary parts is ok

Secondary parts ok

Change T11

Change parts

out of order

YES

Resistance >> 100

YES

Check F801, L801,

L802, D802

Check the secondary

circuit

YES

Check the pattern

and T11, L12, IC11

Terminal open and

measure the output

Voltage

Change parts

out of order

The voltage

is ok

Check the

parts outside

module

Check the Diode,

Condenser inside

Module

YES

B. POWER MODULE (M801) CHECK

3-2. LOGIC CIRCUIT

Digitron does

not operate.

Is +5V supplied to

pin of IC701?

Is -28V supplied to

pin of IC701?

Are -20 and -16.5V

supplied to pin and

of G701?

Are CLK signals

supplied to pin ), I

and i, of IC701?

Is 5V at pin of

IC701?

Check X701

Check IC701

and change.

check power circuit

Is +5.8V supplied

from D713 cathod

Is -28V at D650

anode

Check D814 and

primary power circuit.

Check the connector

and pattern.

Check the power

module

Check IC601

Change

YES

Digitron is lit keys do

not operate.

Is each key pulse

applied to pin ,

and of IC701?

2 3

12 13

Check key matrix

circuit.

Check the pin serial of

pin , ~ of IC701.

19 22 24

Power compensation

does not operated.

When mains is

unplugged is 3.6V at

pin and of IC601?

26 81

Is signal applied to

pin and of IC601?

42 43

Is 5V at pin of IC601

Check IC601

Check C623

Check x602

Check reset circuit

IC604

YES

The voltage of pin

of IC601 is not

changed.

Is CTL pulse input

to pin and of

IC601

71 72

Check and

re-adjust the

Path of Deck.

Check circuit

adjacent to IC601

Check C508, C509

check R518

and C511

Check IC601

YES

YESNO

NO NO

Playback picture

is not good.

Noise appears

although adjusting

tracking.

Is CTL pulse out

from pin of IC601.

Noise shakes up

and down on the

screen.

Adjust

tracking

CTL HEAD height is

normal and there is

not dust.

Adjust the HEAD

height and remove

dust

Noise appears

although change

cassette tape.

3-3. SERVO SYSCON CIRCUIT

Playback picture

is not good.

Noise appears

on the screen

on the whole.

Is Enve.wavefrom

supplied to at pin of

PT01

Are SW pulse and HA SW applied to

HeadAmp circuit?

Check video circuit.

Auto stop during

playback

Is Reel pulse

applied to pin and

of IC601?

Check flow A

Is SW pulse supplied

from pin of IC601?

Check D.PG input

and connector.

Check pattern

Check connector, Head

Amp and Head dust.

Change head

Check reel sensor.

Is D.FG applied to

pin of IC601

Check connector

D.FG circuits.

Check IC601

YES

NO NO

YES

Drum M/T loading stops.

Is Motor 12V supplied?

Is pin D.FG of

IC601 supplied.

Is pin D.PWM (pin )

of IC601 supplied?

Check connector

and Motor.

Is the input of pin

of P501 2V-3.5V?

Is pin of P601 2.5V

Is pin (C.PWM)

of IC601 Supplied?

Check connector

and Motor

Check Q851 of

power circuit.

Check C505, R506, R507

and C516

Check IC601

Check power circuit.

Check circuit of R510,

R511, R512.

Check R508, R509

Check IC601

YES

Capstan M/T loading stops.

Is Motor 12V supplied?

Drum M/T and Capstan M/T rotate

at regular speed. (In REC mode)

Is C. Sync applied to

pin of IC601?

Check Motor.

Check C. Sync of

VIDEO IC and Pattern

Emergency mode when plugging

(Power cord)

Is EVER 5V supplied?

Does X601 crystal osciliate?

Do S/DATA, CLK and RDY

Signals of IC601 exchange

with IC701

Is CAM SW DATA Correct?

Check IC602.

Check IC 601.

Check power circuit.

Check IC601 and X601.

Check IC701 when S.RDY Signal

is supplied.

Check IC601 when S.RDY Signal

is not supplied.

Recheck connector

and CAM SW contact.

YES

Cassette is not

inserted.

Is Motor 12V supplied?

Check Q851 of power

circuit

CAM DATA is changed

when CST IN?

Is 5V applied to

pin of IC602 when CST IN?

Chek IC602

Check connector. Check DECK part.

Is 5V supplied at

pin of IC601?

Check PATTERN

Check IC601

YES

NO NO

YES

+ 63 hidden pages