Sharp LC-37SD1E, Руководство по обслуживанию

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LC-37SA1E/RU
4 – 9
No video output during DTV reception. Colour of Images are not right.
D-TUNER UNIT:
Is data FED[0:7] sent from pins (3),(4),(5),(6),(8),(9),(10) and (11)
of P202? NO Check R272 and R273.
YES
DIGITAL UNIT:
Are video signals (R/G/B,CVBS) sent from C4639/C4640/C4641/
C4625? NO Check R4011(AC8pin),R4013(AC9pin) and IC4001(D-Proces-
sor).
YES
Are video signals (R/G/B,CVBS) send from the C4636/C4637/
C4638 and emitters of Q4607? NO Check Q4601-Q4605,Q4607 and their peripheral circuits.
YES
MAIN UNIT:
Is video signal (CVBS) sent from pin (2) of IC2705(SW). NO Check power supply and pin (1) of IC2705(SW).
YES
Are video signals (R/G/B,CVBS) fed from pins (179),(180),(181)
and (184) of IC3002?
YES
Are scrambled images not displayed? YES DIGITAL UNIT:
Check 5V output of pin (1) of IC4702.
Check 5V of pin (6) of Q4401.
NO
Perform the same check as the model P70E or GD8E.
No audio output during DTV reception. Sound is low.
DIGITAL UNIT:
Is audio signal fed to pins (5) and (10) of IC4604 (OP-AMP)? NO Check R4002(AD2pin) and IC4001(D-Processor).
YES
Is audio signal sent from pins (7) and (8) of IC4604 (OP-AMP)? NO Check power supply of IC4604(OP-AMP) and its peripheral cir-
cuits.
YES
MAIN UNIT:
Is audio signal sent to pin (3) and (13) of IC2704 (SW)? NO heck power supply and pins (9) and (10)of IC2704(SW) and
audio signal input of pins (4) and (11) of IC2704.
YES
Perform the same check as the model P70E or GD8E.