Goldstar FFH-979AX, FFH-1079AX, FFH-886 TROUBLE DIAGRAM

- 2-3 -

TROUBLESHOOTING

Turn power on.

Is power on?

Does initial read work?

Does it play?

Does it output audio?

Check power supply circuit. PN807 PIN5, 6.2V PN807 PIN7, 5V IC803 PIN 2, 3.3V

Check the connector

PN801, PN802, PN809

Check the tracking servo circuit.

Check the PN807 PIN1, 3

OK

YES

NO

NONO

Check the DISK turns

Check the Laser

Check the focus circuit

Check the TRAKING circuit

NO

- 2-4 -

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?

IC801 Pin3

Check the Data transmission from

PN809 pin11 to CD DSP

Check the Data transmission from

PN809 pin13 to MICOM

Check the change of SLDO

Voltage(IC801 pin23)

Check the change of SL +,

SL - Voltage

(IC802 pin 18, 19)

Check the Voltage change of PN 809

PIN20(OPEN, CLOSE)

Defective connector

PN809

Defective connector

PN809, Defective

MICOM

Defective connector

PN809, Defective

IC801

Defective IC801

Defective IC802

Defective contact PN802

Defective PICK-UP

Does laser light?

focus coil drive wareform.

TRACKING ERROR wareform

Is rotation normal?

Defective IC801

Defective PICK-UP

Is there no dropout of RF signal?

Does FA+ waveform appear at

IC802 pin13?

Does TE waveform appear at

801 pin 15?

- 2-5 -

NO

Laser does not light.

Is “3.5V” applied to pin of IC 801?

Is power supplied to laser Q801?

(Q 801 collector: about 1.8V)

Does laser current flow?

1.0V across R808

Is data transferred from MICOM IC ?

Does voltage appear at IC 802 pin 17, 18?

Defective MICOM.

Defective connector.

Defective IC 801, 802

Defective slide motor and/or connector.

Defective LMT SW and/or connector.

Defective Q 801 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 2 of PN802?

R808»1.0V

R808«1.0V

YES

OPEN

CLOSE

YES

70

- 2-6 -

B

NO

YES

Laser lights

Does lens move up/down?

Check the signal of

FOCUS SEARCH

(IC801 Pin 21)

Chekc the signal of PN802

pin 13, 14

Does FE signal appear?

(IC801 pin 13)

Does DRF signal appear? (IC 801 pin67)

Defective IC801

Defective IC802

Open activator and/or connector

Defective IC801

Degraded laser diode

Defective PICK-UP

- 2-8 -

VKK PART

Does DC - 33V appear at

PN703 Pin .

OK

Dose -33V appear at

ZD702(-)

Check the Q752

TURN ON

Replace the Q752

Refer to power circuit

END

Check the -33V(LOW)

of C742(-)

Replace the D709,

D710

YES

NO

P-SENS PART

Does +5V appear at ZD701?

Check the pattern of

IC301 Pin .

Check the waveform

of D796(+).

Check the ZD703 or replace

Replace the D796

YES

NO

26

9

- 2-9 -

Power Circuit

Muting circuit (MUTE)

Check the Fuse

Check the DC output

of C770(+), C720(-)

Check the DC Input of IC704

Check the DC

output of IC703

Check the DC 12V

Output of IC705

Check the 5V of IC703

pin 2(CD FUNCTION)

END

Dose “High” appear at

Q701, Q751, Q251, Q201 “B”

check the “LOW” Q701, Q751,

Q201, Q251 “C”

Refer to “IC202 Troubleshooting”

(ONLY Q201, Q251)

MUTE

Replace the Fuse

Check the AC Output of

CN701 pin1, 5

Check the AC Output of

CN701 PIN 7, 10

Replace the IC705

Replace the D711

Replace the

D712, D795, D794

Check the D791, D792, D793

Check the “High” of

D796(+)

Check the “High” of D793(+)

Check the “High” of Q702 “E”

(ONLY Q701, Q751)

Replace the TR

Refer the Q702

Refer to “IC301

Troubleshooting”

Replace the IC703

Replace the Transformer

Check the Voltage of

IC301 PIN82

Refer to “IC301

Troubleshoot”

YES

NO

- 2-10 -

Audio abnormal

SPK Relay Troubleshooting

Check the output of

IC701 Pin 21, 22

Refer to “IC701

Troubleshooting”

Refer to “Muting

Troubleshooting”

Check the power circuit

Refer to “Spk Relay

troubleshooting”

Refer to “power circuit”

Check “High” of Q745 “B”

Refer to “IC501

Troubleshooting”

Replace the RELAY(RY710)

Replace the Q745

Check the input of

IC601 IC602

Check the Input of IC601,

pin24, 25 IC602 pin 1, 7

Check the RY701

END

Check the 12V of D741(+)

Check the “Low” of Q745 “C”

Check the output

END

YES

NO

- 2-11 -

FUNCTION MODE Audio abnormal

TAPE

Check the signal input of IC601 pin 28, 37

Refer to “IC202 Troubleshooting”

AUX

Chekc the signal input of IC601, pin 29, 36

Check the signal input of JK601

Check the signal input of IC601 pin 31, 34

Refer to “CD Troubleshooting”

Check the signal input of IC601 pin 30, 35

Refer to “IC102 Troubleshooting”

CD

Tuner

- 2-12 -

Refer to “IC301

Troubleshooting”

IC301 Troubleshooting

IC501, IC302 Troubleshooting

Check the power supplying IC301 Pin 17, 46, 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 3, 4, 5

(CD ➞ TAPE FUNCTION)

Replace the

IC501/IC302

Check the pattern

of (IC301, IC501, IC302)

Check the 5v of IC301 pin26

Check the oscillation of X301

When power supplying to IC301 pin17.

(Low ➞ High)

Replace the IC301

Check the power supplying to IC501/IC302 pin 16

Check the CLK Data of IC501/IC302 pin 2, 3

Check the CONTROLL function

END

YES

NO

- 2-13 -

IC601 Troubleshooting

Check the 9V of ZD601

Refer to “FUNC Troubleshooting”

Replace the ZD601

Refer to “SPK Relay”

Check the FUNC CLOCK DATA of pin 21, 22

Check the power of pin 39

Check the signal input

Check the Signal output of pin25, 24

OK

YES

NO

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 “GND” of IC103 Pin 7

Refer to “IC103

Troubleshooting”

Replace the Q102

Replace the TUN101

YES

NO

- 2-14 -

IC102 Troubleshooting

Is power supplied to pin8

Check the waveform of Pin 20, 21

Check the 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

IC103 Troubleshooting

Check the power supplying to pin 17

Check the oscillation of X104

Check the waveform 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

- 2-15 -

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 IC202 pin 18

Refer to “Power Circuit Troubleshooting”

Check the Deck Mecha

Replace the Deck

Mecha.

Replace the IC202

Check the signal output of IC202 pin 5, 20

Check the Muting Circuit

YES

NO

YES

NO

Dubbing(“NORMAL or REC “//“HIGH”)

Q252, 202 “OFF”//“ON” : R273, 223

“LOW”//“HIGH

Q253, 203 “ON”//“OFF” : R225, 275

“High”//”Low”

Refer to “IC203 Troubleshooting”

Refer to “REC Troubleshooting”

- 2-16 -

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

Check signal supplied to IC202 pin 11, 14?

Check the output of IC202 Pin9, 16

Check the IC201 pin6 : 12V and pin 4 : High

Check the power or Refer to “IC203

Troubleshooting”

Check the power

supplying to C236(+)

Check the 0.6V of Q208

“B”

Check the “Low” of

Q208 “C”

Replace the Q207

END

Check the Vcc power of IC202 Pin18

Check the oscillation of L203 pin 2, 3

Replace the DECK

Check the “Low” of Q253,

Q203 “B”

Replace the Q253, Q203

Refer to “IC203

Troubleshooting”

Refer to “Power Circuit

Troubleshooting”

Refer to “IC203

trouleshooting”

Replace the Q208

Replace the L203

YES

NO

Goldstar FFH-979AX, FFH-1079AX, FFH-886 TROUBLE DIAGRAM

Specifications and Main Features

Frequently Asked Questions

User Manual