Sanyo DP42746 Service Manual page 30

NO AUDIO
All Modes ?
No
Yes
Is there
signal at speaker
terminal ?
Yes
No
Is there
signal at IC001 2pin (L)
or 4pin (R) ?
Yes
No
Audio Out only
RF(TV) only
Digital Module only
AV1, AV2, AV3 only
Check:
AV1
Line:
or
AV1 Terminal - IC1251 14pin (L)
AV1 Terminal - IC1251 5pin (R)
AV2
AV2 Terminal - IC1251 15pin (L)
or
AV2 Terminal - IC1251 2pin (R)
AV3 Terminal - IC1251 11pin (L)
AV3
AV3 Terminal - IC1251 4pin (R)
— 30 —
Check:
Speaker (SP901, SP902)
Check:
Line: IC001 6pin - IC801 (CPU) 38pin (Mute)
Parts: Around IC001 (Audio AMP.)
Check:
Parts: Around IC3401 (Audio Control)
Check:
Line:
IC3401 39pin (L) - Audio Out Terminal
IC3401 38pin (R) - Audio Out Terminal
IC801 (CPU) 37pin - Q1101(L) / Q1102(R) (Mute)
Parts: Q1101, Q1102
Check:
Line:
A101 6pin - Q102 - IC3401 13pin (R)
Parts: A101 (TU, IF), Q102
Check:
Line:
Digital Module (K6MA: 37pin) - IC3401 33pin (R),
Digital Module (K6MA: 39pin) - IC3401 34pin (L),
Parts: Digital Module
Check:
Line:
IC1251 3pin - IC3401 36pin (R),
IC1251 13pin - IC3401 37pin (L),
Parts: IC1251 (Audio SW)