Goldstar FFH-296AX, FFH-1960 Service Manual TROUBLE

- 2-2 -

TROUBLESHOOTING

Turn power on.

Is power on?

Does initial read work?

Does it play?

Does it output audio?

Check power supply circuit. PN508 PIN 8, 6.2V PN508 PIN 7, 5V IC503 PIN 2, 3.3V

Check the connector

PN502, PN503, PN507

Check the tracking servo circuit.

Check the PN508 PIN1, 3

OK

YES

NO

NONO

Check the DISK turns

Check the Laser

Check the focus circuit

Check the TRAKING circuit

NO

- 2-3 -

Fails to initial read

A

B

2V

5V

0V

5V

0V

1V

0V

1.2V

0V

0.8V

NO NO

NO

YES

Disc motor turns

Does RF waveform appear?

IC501 Pin4

Check the Data transmission from

PN507 pin8 to CD DSP

Check the Data transmission from

PN507 pin6 to MICOM

Check the change of SLDO

Voltage(IC501 pin23)

Check the change of SL +,

SL - Voltage

(IC502 pin 18, 19)

Check the Voltage change of PN 507

pin2(OPEN, CLOSE)

Defective connector

PN507

Defective connector

PN507 Defective

MICOM

Defective connector

PN507 Defective

IC501

Defective IC501

Defective IC502

Defective contact PN503

Defective PICK-UP

Does laser light?

focus coil drive wareform.

TRACKING ERROR wareform

Is rotation normal?

Defective IC501

Defective PICK-UP

Is there no dropout of RF signal?

Does FA+ waveform appear at

IC502 pin13?

Does TE waveform appear at

IC501 pin 15?

- 2-4 -

A

NO

Laser does not light.

Is “3.5V” applied to pin 80 of IC 501?

Is power supplied to laser Q501?

(Q 501 collector: about 1.8V)

Does laser current flow?

1.0V across R508

Is data transferred from MICOM IC ?

Does voltage appear at IC 502 pin 18,19 ?

Defective MICOM.

Defective connector.

Defective IC 501, 502

Defective slide motor and/or connector.

Defective LMT SW and/or connector.

Defective Q 501 and/or laser.

Defective laser and/or connector.

Did pickup return to

innermost circular?

Does it stop at inner pick circular after shift?

Is defect output from LM SW applied to pin of PN503?

R508»1.0V

R508«1.0V

YES

OPEN

CLOSE

YES

5

- 2-5 -

B

NO

YES

Laser lights

Does lens move up/down?

Check the signal of

FOCUS SEARCH

(IC501 Pin 21)

Chekc the signal of PN502

pin 13, 14

Does FE signal appear?

(IC501 pin 13)

Does DRF signal appear? (IC 501 pin67)

Defective IC501

Defective IC502

Open activator and/or connector

Defective IC501

Degraded laser diode

Defective PICK-UP

- 2-7 -

VKK PART

Does DC - 27V appear at

PN301 Pin .

END

Dose -27V appear at

ZD801(-)

Check the Q801

TURN ON

Check the -27V (LOW)

of C773(-)

Replace the D801

Replace the D801, D802

Check the

power

END

YES

NO

P-SENS PART

Does +5V appear at ZD702?

Check the pattern of

IC301 Pin .

Check the waveform

of D706 (+).

Check the R718 and

replace ZD703.

Replace the D706

YES

NO

26

20

- 2-8 -

Power Circuit

Muting circuit (MUTE)

Check the Fuse

Check the DC output

of C608(+), C609(-)

Check the DC 12V

Output of IC602, IC603

Check the DC 6.2V

output of IC601

Check the DC 12V

Output of IC601

Check the 5.6V of Q704 “C”

(CD FUNCTION)

END

Dose “High” appear at

Q701, Q751“B”

check the “Low” of Q701,

Q751, “C”

MUTE

Replace the Fuse

Check the power

Check the D611, D612

Replace the IC703

Replace the D606, D607,

D608, 609

Replace the D611, D612

Check the D602, D610

Check the “High” of

IC703 pin4

Check the “High” of Q705“B”

Refer to “IC 203 Troubleshooting

(ONLY Q201/251)

Check the “Low” of the Q702 “B”

Check the “HIGH” of Q702, “E”

Replace the Q702

Refer to IC 301

Troubleshooting

Replace the Q704

Replace the Transformer

Check the “LOW” Voltage

of IC401 Pin 8

Refer to IC401

Troubleshooting

YES

NO

- 2-9 -

Audio abnormal

SPK Relay Troubleshooting

Check the output of

IC701 Pin 6, 10

Check the connecting to

SPEAKER

Check the 0.6V of Q710 “B”

Check the input terminal of

Function

OK

Check the output of IC 703

Check “High” of IC400 pin 5

Check the CLOCK of

IC400 PIN 2, 3

Replace the REPLAY(RY710)

Check the input of

IC701 Pin 1, 15

Check the DC10V of IC400

pin24

Check the DC 12V Output of

IC702

Check the power

Check the 12V of R71

Check the High of Q710 “B”

Check the output

END

YES

NO

- 2-10 -

FUNCTION MODE Audio abnormal

TAPE

Check the signal input of IC400 pin 7, 28

Refer to “IC201 Troubleshooting”

AUX

Chekc the signal input of IC400, pin 1, 6

Check the signal input of JK705

Check the signal input of IC400 pin 3, 4

Check the signal of PN599 pin 6, 8 or

Refer to “CD Troubleshooting”

Check the signal input of IC400 pin 2, 5

Refer to “IC102 Troubleshooting”

CD

Tuner

- 2-11 -

Refer to “IC301

Troubleshooting”

IC301 Troubleshooting

IC400 Troubleshooting

Check the power supplying IC301 Pin 17, 46, 72, 90?

Refer to “Power Circuit Troubleshooting”

Check the P-SENS

Replace the X301

Check the RESET circuit

Refer to “Power Circuit Troubleshooting”

Check the Data of IC301 Pin 9, 10

(CD ➞ TAPE FUNCTION)

Replace the

IC400

Check the pattern

of (IC301 & IC400)

Check the P-SENS “High” of IC301 pin 26

Check the oscillation of X301

When power supplying to IC301 pin11.

(Low ➞ High)

Replace the IC301

Check the power supplying to IC400 pin24

Check the CLK Data of IC400 pin 21, 22

Check the CONTROLL function

END

YES

NO

- 2-12 -

FM (TUN101)

Check the +12V input of TUN101 B+ 6

Check the “High” Voltage of TUN101 VT 5

Check the OSC waveform of TUN101 Pin 8

Refer to “IC102 Troubleshooting”

Check the 12V of Q102 “E”

Refer to “Power

Circuit Trouble-

shooting”

Check the “LOW” of IC103 Pin 7

Refer to “IC103

Troubleshooting”

Replace the Q102

Replace the TUN101

YES

NO

IC102 Troubleshooting

Check the power supplying to pin8

Check the waveform of Pin 20, 21

Check the waveform output of Pin 16, 17

END

Refer to “Power Circuit

Troubleshooting”

Check the FM(TUN101) & AM(L107)

Replace the IC102

Check the “Low” of Pin 13

Refer to “IC103

Troubleshooting”

YES

NO

- 2-13 -

IC103 Troubleshooting

Check the power supplying to pin 17

Check the oscillation of X104

Check the clock of CE, DI, DO, CLK

Is the normal ?

END

Refer to “Power Circuit

Troubleshooting”

Replace the X104

Check the line orrefer to “IC 301 Troubleshooting”

CE: Chip Enable

DI: Data Input(from u-com)

DO: Data Output(to u-com)

CLK: Tuner mode clock

Replace the IC103

YES

NO

AM•COIL Troubleshooting

Check the “High” of L107 Pin 2

Refer to “IC103 Troubleshooting”

Replace the L107

Check the oscillation of L107 Pin 13

Refer to “IC102 Troubleshooting”

YES

NO

Play

Check the VCC supplying to IC201 pin 4

Refer to “Power Circuit Troubleshooting”

Check the Deck Mecha

Replace the Deck

Mecha.

Replace the IC201

Check the signal output of IC201 pin 3, 6

Check the “LOW” of Q201, Q251, “B”

YES

NO

- 2-14 -

REC (Q252, Q202 ON / R273, R223 High)

Check signal supplied to IC203 pin 2, 8 ?

Check the output of IC203 Pin3, 7

Check the “High” of IC203 pin 6

Check the power or Refer to “IC203

Troubleshooting”

Check the power

supplying to C227(+)

Check the oscillation of

Q204, “E”

Check the 0.6V of

Q205 “B”

END

Check the Vcc power of IC203 Pin6

Check the oscillation of L201 pin 1, 3

Replace the DECK

Check the “Low” of Q202,

Q252 “B”

Replace the Q202, Q252

Refer to “IC203

Troubleshooting”

Refer to “Power Circuit

Troubleshooting”

Check the 0.6V of

Q205 “B”

Check the IC401 pin12

or Replace the L203

YES

NO

Goldstar FFH-296AX, FFH-1960 Service Manual TROUBLE

Specifications and Main Features

Frequently Asked Questions

User Manual