Sharp 13VT-CL10, Руководство по обслуживанию, Страница: 51 / 106

51
13VT
-L200
SOUND E-E MODE TROUBLESHOOTING FLOW CHART NO.1-15 FLOW CHART NO.1-16
No E-E signal
YES
YES
YES
YES
NO
YES
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
Are there the I
2
C bus data
and clock signal at pins (8)
and (7) of IC2201?
Check circuits around the audio output
circuit in tuner (TU51) and parts around the
audio inputs jack (J401).
Check between pins (8) and (7) of IC2201
and all the way thru to pins (52) and (51) of
IC7701.
NO
NO
NO
NO
SOUND RECORDING MODE TROUBLESHOOTING
No record.
Check PC 5V line.
Is there "H" level at pin (72) of IC2201?
Check A-MUTE (H)
Line. (IC2201 pin (72)~
IC7701 pin (50)).
Replace
IC2201.
Check the I
2
C
bus data and
clock signal line.
Replace
IC2201.
Is there a signal at pin (87) or
(91) of IC2201?
Is the supply voltage of 5V
feed to pin (84) of IC2201?
Is there a signal at pin (85) of
IC2201?
Check between pin (85) of IC2201 and pin (1) of IC402.
Is voltage of pins (86) and (88) of IC2201
normal?
Is there "H" level at pin (70) of
IC2201?
Check BIAS CTL (H) line.
Check PC 9V line.
Is there a signal at pin (81) of
IC2201?
Is there "H" level at pin (2) of
T6601?
Is there a signal (Bias) at pin (6) of
T6601? Check T6601, Q6603, Q6604 and
their peripheral parts.
Is there a signal (Bias+Audio sig.) at
pin (4) of connector AA?
Check the signal line between pin
(4) of connector AA and pin (81) of
IC2201, and pin (6) of T6601.
NO
YES
After there the I
2
C bus data and
clock signal at pins (8) and (7) of
IC201?
Check FFC MH-AA and A/C head.