Goldstar FFH-S197AX, FFH-S198AX Schematic

- 2-1 -

SECTION 2. ELECTRICAL

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

PN503, PN504, 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

- 2-2 -

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

501 pin 15?

- 2-3 -

NO

Laser does not light.

Is “5V” applied to pin 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 , ?

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

66

18

19

3

- 2-4 -

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

- 2-5 -

(CH1)

(CH2)

WAVEFORMS OF MAJOR CHECK POINT

1. HF signal (RF signal ) waveform (IC501 pin 4) during normal play

2. EFM signal (IC501 pin 3)waveform during Normal Play

3. Focus coil drive waveform(IC502 pin13)

• When focus search failed or there is no disc on the tray

• Focus coil drive waveform(FDO: IC501 pin21) and DRF(IC501 pin67) when focus search is accomplished

4. Tracking coil drive waveform and TE during track traverse (1) When time division is 20mS/Div.1V/Div.

(2) When time division 1mS/Div, 1V/Div

(During forward track traverse)

(3) When time division is 0.5nS/div.

(During backward Track Traverse)

5. Feed motor drive waveform(IC 502 pin18) During normal play

CH1 : FOCUS COIL DRIVE

SIGNAL 2V/Div.

CH2 : DRF

CH1 : TRACKING COIL DRIVE

SIGNAL 2V/Div. (IC502 pin27)

CH2 : TRACKING ERROR(TE: IC501 pin15)

1V/Div.

(

CH1 : TRACKING COIL DRIVE (IC502 pin27)

SIGNAL 2V/Div.

CH2 : TRACKING ERROR (TE: IC501 pin15)

1V/Div.

(

CH1 : TRACKING COIL DRIVE (IC502 pin27)

CH2 : TRACKING ERROR (TE: IC501 pin15)

(

0.5V/Div. 500nS/Div.

(

1S/Div. 1V/Div.

(

1mS/Div. 1V/Div.

(

0.5V/Div. 5µS/Div.

(

2S/Div.

0.5V/Div.

0V

0V (CH1)

(CH2)

(CH1)

(CH2)

0V

- 2-6 -

P-SENS PART

Does +5V appear at ZD702?

Check the pattern of

IC301 Pin .

Check the waveform

of D706 (+).

Check the R718 and

replace ZD702.

Replace the D706

YES

NO

26

Power Circuit

Check the Fuse

Check the DC output

of C715(+), C716(-)

Check the DC

Output of IC702

Check the DC 12V

output of IC703

Check the DC 6.2V

output of IC704

END

Replace the Fuse

Check the AC output of

PN601 pin 1, 3

Check the D701

Check the D713

Replace the Transformer

Check the voltage of

IC302 pin 2

YES

NO

- 2-7 -

Muting circuit (MUTE)

Dose “High” appear at

Q701, Q751, Q706, Q707,

Q709

Check the “Low” of Q701,

Q706, Q707, Q709, Q751, “C”

MUTE

Check the “HIGH” of IC301 pin9

(ONLY Q706, Q707, Q709)

Check the “High” of the Q702 “E”

(ONLY Q701, Q751)

Replace the Q702

Replace the TR

Refer to IC 301

Troubleshooting

YES

NO

Audio abnormal

Check the output of

IC400 Pin 26, 27

Refer to “IC400

Troubleshooting”

Refer to “Muting

Troubleshooting”

Check the power Circuit

Check the “LOW” of IC301

pin24

Check the input of

IC701 Pin 7, 11

Check the output of IC701

pin2, 4

Check the “LOW” of CN704

pin5

END

YES

NO

- 2-8 -

FUNCTION MODE Audio abnormal

AUX

Chekc the signal input of IC400, pin 3, 4

Check the signal input of JK401

Check the signal input of IC400 pin 1, 6

Check the signal of PN703 pin 6, 8 or

Refer to “CD Troubleshooting”

Check the signal input of IC400 pin 2, 5

Refer to “IC102 Troubleshooting”

CD

Tuner

- 2-9 -

Refer to “IC301

Troubleshooting”

IC301 Troubleshooting

IC400 Troubleshooting

Check the power supplying IC301 Pin 17, 54, 90?

Refer to “Power Circuit Troubleshooting”

Check the P-SENS

Replace the X301

Check the RESET circuit

Refer to “Power Circuit Troubleshooting”

Check the PIN of MICOM 4, 5

Replace the IC400

Check the pattern

of MICOM (4, 5)- IC400

(21, 22)

Check the 5V 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 waveform output of IC400 pin 8, 10

Check the waveform input of IC400 pin9, 11

Check the waveform output of IC400 pin26, 27

END

YES

NO

- 2-10 -

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

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

- 2-11 -

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

- 2-12 -

IC701 Troubleshooting

Check the signal input of IC 701 pin 11, 7

Check the voltage difference (9~10V)

of pin 3 & pin 5

Check the PIN 1, 6(-), PIN 3(+)

Check the signal output of PIN 2, 4

END

Refer to “Muting Troubleshooting”

Check th ZD701

Refer to “power circuit”

Check the “Low” of CN704 pin5

Check the “Low” of IC301 pin24

YES

NO

Goldstar FFH-S197AX, FFH-S198AX Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual