Sanyo DP23845 Service Manual page 48

TROUBLE SHOOTING FLOW CHARTS (CONT.)
NO AUDIO
All Inputs ?
No
Yes
Is there
signal at speaker
terminal ?
No
Is there
signal at IC001 2pin (L)
or 4pin (R) ?
No
Audio Out only
RF(TV) only
Check:
AV1
Line:
or
AV1 Terminal - IC3001 30pin (L)
AV1 Terminal - IC3001 1pin (R)
AV2
AV2 Terminal - IC3001 29pin (L)
or
AV2 Terminal - IC3001 2pin (R)
AV3 Terminal - IC3001 28pin (L)
AV3
AV3 Terminal - IC3001 3pin (R)
Check:
Speaker (SP901, SP902)
Yes
Check:
Line: IC001 1pin - Q002(C) - IC801 (CPU) 14pin (Mute)
Parts: Around IC001 (Audio AMP.), Q002
Yes
Check:
Parts: Around IC3001 (Audio SW, Control, Surround)
Check:
Line:
IC3001 26pin - Q1002(E) - Audio Out Terminal (L)
IC3001 5pin - Q1001(E) - Audio Out Terminal (R)
IC801 (CPU) 8pin - Q1004(R) / Q1005(L) (Mute: POWER3)
Parts: Q1001, Q1002, Q1004, Q1005
Check:
Line:
A201 6pin - IC3001 27pin (L)
A201 7pin - IC3001 4pin (R)
Parts: A101 (TU, IF, Sound Multiplex)
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