LG FA162 - Open Close Ng; Reading Display Check (= Only CD Display)

3-18
ELECTRICAL TROUBLESHOOTING GUIDE OF CD PART
3. OPEN CLOSE NG
Check connector locking.
(CN403)
Defective IC401.
Defective Main power supply.
Defective mechanism.
Check voltage
IC401 (S3053)
Pin8, 19: 5 V
NO
Check
voltage IC401 (S3053)
Pin9: LOAD-,
Pin10: LOAD+
NO
YES
YES
YES
4. “ READING ” DISPLAY CHECK (= ONLY “CD” DISPLAY)
Check connector locking.
(CN401, CN403)
Defective IC804.
Refer to
SMPS troubleshooting.
Defective μ-com or connector.
Defective μ-com or connector.
Defective IC801.
Check voltage
IC401 (S3053)
Pin8, 19: 5 V
NO
Check voltage
IC804 Pin2: 3.3 V.
Check reset signal
PN805 Pin15: 5 V.
Check μ-com interface circuit (PN805)
PN805 Pin1,3,4,15,19,26 signal check
(1:CE, 3: DI, 4: CLK, 15: D0, 19: RST, 18: FSEQ, 26: WRQ)
Pin3 DI : from DSP to μ-com,
Pin15 DO: from μ-com to DSP
Check the waveform #1
NO
NO
NO
YES
YES
YES
YES
YES