Sharp VC-90ET

Is there a signal at pin
© of 1C201?
Is there a signal at pin
@ of 1€201 ?
ls there a signal at pin
®of K401.
E-E MODE TROUBLESHOOTING
No E-E signal.
Is there a signal at pin
@ of 1C1502 ?
FLOW CHART NO. 18
Check 9V at pin © of
11502.
Check the DC level at
pin @, @, and @ of
1€1502,
- : Don’t Care
Check signals at pin O,
@ and ©.
Check Q205 and the
PC9V, and ATE.5V line.
Check R218 (E-€ level
ADI.).
Is there 5V at pin @of
(C201?
YES
Is there a signal at pin
@ of 1€201?
Yes
Is there a signal at pin NO :
@of 1€2017 Change FL201 (LPF).
Check the DC level at
pin (3) of 1C201(DC ”
L” fevel).
Check NTSC SKEW UNIT.
Hifi TROUBLESHOOTING (1)
No HIFi EE sound heard
Audio signal input from tuner.
(Tuner/External audio signal input
seleact conditions at pin Gaof
1€6302).
MI Tuner audio input
| External audio input
YES
External! audio signal input.
(Tuner/External audio signal input
select conditions at pin G4) of 1€6302).
iM | Tuner audio input
LH | External audio input
FLOW CHART WO. 19
Is audio signal Check the Is audio signal Check the line
inputted to pins line inputted to pins between the
@ (L-ch), Go) between the ® (L-ch) and @ external audio
(R-ch) and @5) SIF unit and (R-ch) of 1€6302 input terminal
the HiFi unit. ? and the HiFi
unit.
YES
|s audio signal outputted at NO _ {Is the supply voltage of 9 V fed Check the PC9V
pins @ and Gof 1C6302 ? to pin (16 of 1C6302 ? line.
YES YES
Replace !C6303.
's audio signal inputted to pins | NO
© and G2 of 16303.
YES
Check C6314 and R6313 (L-ch EE level) as well as C6333
and R6311 (R-ch EE level).
Line coupling.
1s audio signal outputted at pins and @4)of 16302?
RF coupling.
{s audio signal outputted at pin of (C6302 ?
Audio signal output mode selection.
Pin Q9) of C6302 Pin Gd of 16302
pH {Rech | [HI HiFi
[M|t-ch |
Riplace 1C6302.
YES
Line coupling.
Check the line ranging from pins and @) of 1C6303 to the audio output terminal.
RF coupling.
Check the line ranging from pin of 1C6303 to the audio input terminal of the RF converter.
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