Daewoo DSP-4210GM, Service Manual

Page: 17 / 36

Service manual SP-110
- 16 -
is the sound signal input jack
correctly connected?
is the speaker properly connected?
Is sound signal output from P502?
is sound signal on P400 No.2,3
of audio PCB?
is sound signal on PA400 No.2,4 1. PA400 connector is N.G
of audio PCB? 2. Change audio PCB
N
NO Sound
Check start
Y
1.Make sure of connection of jack(PDP monitor & A/V device)
N
N
N
Y
Y
N
N
Y
Does the screen appear?
1. Confirm AC connection
2. Confirm power S/W on
3. Inspect video PCB and other blocks
Y
Connect speaker
1. Jack PCB is N.G
2. Video connection to
jack PCB is N.G
See: Siganl composition of P502 sound
1. RSPC, LSPC => PC sound
2. RSD1, LSD1 => DTV/DVD sound
3. RSV1, LSV1 => VIDEO, S-VHS sound
1. Sound S/W is N.G
2. Confirm IC404
3. Change video PCB
is sound AMP on PA300 No.1,4 of Is power fed to PA3 of 1. Confirm if PA3 connector is N.G
audio PCB processing an output? audio PCB? 2. Change power board
Y
N N
Does sound AMP on PA300 No.1,4 and
JP659 of audio PCB produce an output? 1. PA300 is N.G (Change audio PCB)
or JP659 is N.G (Change jack PCB)
1. Speaker or sound cable is N.G
2. Change speaker or sound cable
N
Y
Y
Y