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TROUBLESHOOTING FLOW CHARTS (Cont.)
NO AUDIO
Is there
signal at speaker
terminal ?
Yes
No
No
Check:
Speaker (SP901, SP902)
All Modes ?
Is
there signal
at IC001 21pin (L)
or 10pin (R) ?
Yes
Check:
Line:
IC001 21/10pin - IC101 15/11pin (L/R)
IC101 24(27)/31(28)pin - Spearkers (L/R)
IC801 73pin - Q101 - IC101 12pin (Mute)
Parts: Around
IC101 (Audio AMP), Q101
Yes
Check:
Parts: Around IC001 (Audio Control)
Check:
Line:
Video 1 Terminal - IC1201 2pin (L)
Video 1 Terminal - IC1201 4pin (R)
Component 2 Terminal - IC1201 8pin (L)
Component 2 Terminal - IC1201 10pin (R)
Component 3 Terminal - IC1201 14pin (L)
Component 3 Terminal - IC1201 15pin (R)
U/V Tuner 6pin - IC1201 44pin (L)
U/V Tuner 7pin - IC1201 42pin (R)
M/O Terminal - Q1201 - IC1201 26pin (L)
M/O Terminal - Q1202 - IC1201 24pin (R)
Parts: Around
IC1201 (AV Switch),
Q1201, Q1202 (Audio Out only)
Q003, Q008 (D-TU Audio Out only)
Video 1, Component 2,
Component 3, (Analog)
Tuner, or Audio Out
Check:
Line:
D-Tu Output (K6502) - IC004 1,2,3,4pin (Digital L/R)
IC004 7pin - IC005 3pin - IC005 1pin - Q004 - IC001 27pin (L)
IC004 10pin - IC005 5pin - IC005 7pin - Q002 - IC001 4pin (R)
IC005 1pin - Q003 - IC1201 17pin (Audio Output L)
IC005 7pin - Q008 - IC1201 18pin (Audio Output R)
Parts: Around
IC004 (D/A Converter), IC005 (AMP), Q004, Q002,
D-TU Board, Q003, Q008 (D-TU Audio Out only)
D-TU
Digital Tuner Input
No