Goldstar FFH-V3865AX, FFH-V386AX TROUBLESHOOTING
- 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
YES
YES
YES
YES
YES
NO
NONO
Check the DISK turns
Check the Laser
Check the focus circuit
Check the TRAKING circuit
NO
NO
- 2-4 -
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
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
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 -
A
NO
NO
NO
NO
NO
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 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
YES
YES
YES
OPEN
CLOSE
YES
YES
YES
YES
YES
YES
70
- 2-6 -
B
NO
NO
NO
NO
NO
YES
YES
YES
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
CN302 Pin .
Check the Voltage of IC301
pin51
Dose -33V appear at
ZD775(-)
Check the Q704
TURN ON
Check the PATTERN
Replace the ZD775
Replace the Q701
Refer to power circuit
END
Check the -33V(LOW)
of C767
Replace the D704,
D705
YES
YES
NO
NO
P-SENS PART
Does +5V appear at ZD703?
Check the pattern of
IC301 Pin .
Check the waveform
of D703(cathod).
Check the R768 and
replace ZD703.
Replace the D703
YES
YES
NO
NO
26
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