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
YES
YES
YES
YES
YES
YES
YES
NO
NONO
Check the DISK turns
Check the Laser
Check the focus circuit
Check the TRAKING circuit
NO
NO
- 2-2 -
Fails to initial read
A
B
2V
5V
0V
5V
0V
1V
0V
1.2V
0V
0.8V
NO NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
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
NO
NO
NO
NO
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 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
YES
YES
YES
OPEN
CLOSE
YES
YES
YES
YES
YES
YES
66
18
19
3
- 2-4 -
B
NO
NO
NO
NO
NO
YES
YES
YES
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
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