Daewoo DHC-XD 350, Service Manual

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14
5. Trouble Shooting Guide
-. Audio Part
Check if the IC202
PIN 23,24, 27, 28, 29,
30, 33, 34 and IC201
PIN 27, 28, 33, 34
waveform is OK.
Check if the J801
waveform is OK.
OK
Check if the IC201, 202
PIN 14 is OK.
Check if the
IC201, IC202 PIN 35 is
High?
Refer to STA304A.
Check if the
IC801, IC802, IC803 PIN
4, 7, 12, 15 waveform
are OK.
Refer to POWER circuit.
Refer to Digital Amp.
Check POWER circuit.
Check OSC circuit XC201.
Check MICOM Control
circuit.
No
No
Yes
Yes
No
Yes
Yes
No
No
Yes
Check if the WC701
is OK.
Check if the
CW507
waveform is OK.
Check if the
CW503 PIN 1 to 7
waveform are OK.
Check if the
CW203 PIN 1 to 7
waveform are OK.
Check if the
IC211 PIN 4, 7, 9, 12
waveform is OK.
Check if the
IC212 PIN 4, 7, 9
waveform is OK.
Reconnect it
Refer to Regulator circuit.
Refer to MPEG Decoder
circuit IC501.
Refer to CN203
Refer to MUX circuit IC211.
Refer to MUX circuit IC212.
Yes
Yes
N
o
N
o
N
o
N
o
N
o
Yes
Yes
Yes
N
o
Yes
1
1
1. DVD Abnormal(w/o DSP)
AUDIO Abnormal
Check if the
IC801, IC802, IC803 PIN
27 is High.
Yes
Check short parretn.
No
DHC-XD350