Sanyo DP50749 Service Manual page 39

TROUBLESHOOTING FLOW CHARTS (CONT.)
NO AUDIO
Trouble Shooting Audio US1K(42/46)
All Modes ?
No
Yes
Is there
signal at IC001 7pin (L)
or 3pin (R) ?
No
Monitor Out only
RF(TV), Digital(TV)
only
AV1, AV2, AV3,PC
only
AV1 or AV2or AV3
or PC
HDMI 1 / 2 / 3
Is there
signal at speaker
terminal ?
Yes
No
Check:
Line: IC001 1pin - IC800 (CPU) 22pin (Mute)
Yes
Parts: Around IC001 (Audio AMP.)
Check:
Parts: Around IC6250 (DAC)
Check:
Line:
IC6300 1pin (L) - Monitor Out Terminal
IC6300 7pin (R) - Monitor Out Terminal
Parts: Q1001, Q1002
Check:
Line:
A6100 21pin - IC5500 AA17pin (IF1)
A6100 20pin - IC5500 AA18pin (IF2)
Parts: Around A6100(TU), IC5500
Check:
Line:
IC1200 3pin - IC6270 14pin (R),
IC1200 13pin - IC6270 13pin (L),
Parts: Around IC1200 (Audio SW),
IC6270 (Audio ADC)
Check:
Line:
AV1 Terminal - IC1200 14pin (L), 5pin (R)
AV2 Terminal - IC1200 15pin (L), 2pin (R)
AV3 Terminal - IC1200 11pin (L), 4pin (R)
PC Terminal - IC1200 12pin (L), 1pin (R)
Check:
Line:
HDMI1 Terminal - IC5500
HDMI2 Terminal - IC5500
HDMI3 Terminal - IC5500
Parts: Around IC5500
– 35 –
Check:
Speaker (SP901, SP902)