DAEWOO ELECTRONICS DV 115, Service Manual

Page: 14 / 63

14
5. Trouble Shooting Guide
-. Audio Part
Check if the IC524
PIN(13) waveform is OK.
Check if the CN503
PIN(1) waveform is OK.
Check if the IC710
PIN(1) waveform is OK.
Check if the
SPKOUT waveform is
OK.
OK
Check if the IC521
PIN(3) waveform is OK.
Check if the IC522 is OK.
Check CN504 MIC OPTION
and R585L/R.
Check if the IC524
PIN(31) waveform is OK.
Refer to VOLUME IC
M62446FP.
Check OP AMP circuit IC525.
Check F_MUTE circuit
same to C-MUTE, S_MUTE.
Refer to Switch circuit IC521.
Refer to OP-AMP circuit.
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
Yes
No
Check if the RELAY
CONTROL is OK.
Check if the
IC710 PIN(6).
Check SPEAKER system.
Refer to RELAY circuit.
Refer to MAIN AMP circuit
STK402-050.
No
Yes
Yes
No
No
Check if the CN505
is OK.
Check if the
IC510 PIN(3)(4)
waveform is OK.
Check if the CN502
PIN(7) waveform is OK.
Check if the IC712
PIN(6) waveform is OK.
Check if the IC508
PIN(20) waveform is OK.
Check if the IC518
PIN(3) waveform is OK.
Check if the IC521
PIN(14) waveform is OK.
Reconnect it
Refer to DIR circuit IC504.
Refer to OP AMP circuit
IC511.
Refer to FUNCTION IC IC712
circuit.
Refer to OP AMP circuit
IC711, IC512.
Refer to CODEC circuit IC508
same to FR/C/SL/SR/SW.
Check if the IC518 is OK.
Check if the MUTE/
DSP-MUTE is OK.
Check OP AMP circuit
IC519, 520.
Refer to OP AMP circuit.
Check MUTE/
DSP-MUTE circuit.
Yes
Yes
No
No
No
No
No
Yes
Yes
Yes
Yes
No
No
Yes
Yes
No
No
Yes
1
1
1. DVD Abnormal
AUDIO Abnormal
DV-115/125