LG GDR-8161B Service Manual page 41

Tray open/close doesn't work
Push S701 then,
IC201 (131) : Low (0V)?
OK
Push S401 then,
IC201 (132) or (176) : Low(0V)?
OK
Check wave form:
IC301(38)
IC301(41)
IC301(40)
OK
IC301(25) : 1.65V?
OK
Check wave form:
IC301(36)
IC301(37)
OK
Check wave form:
PG403(1)-(2)
OK
Can Disc tray be moved by hand?
Note : When the circuit number is written, check parts and
soldering including a nearby circuit.
When two or more pin numbers are indicated by the party,
check signal-line including a nearby circuit.
Check item
NG
• S701
• S701 - PG402(1) - PG401(1) - IC201(131)
NG
• S401
• S401 - PG402(9) - PG401(9) - IC201(132)
• S401 - PG402(10) - PG401(10) - IC201(176)
• IC301(38) -- IC201(59)
NG
• IC301(41) -- IC201(60)
• IC301(40) -- IC201(65)
• IC201
NG
• IC101(29) -- IC301(25)
• IC101
NG
• IC301
NG
• IC301(36) - PG401(11) - PG402(11) - PG403(1)
• IC301(37) - PG401(12) - PG402(12) - PG403(2)
NG
• Loading mecha.
OK
• Loading motor.
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