Read Sharp LC-32P50E (serv.man9) Service Manual online
LC-26P50E
LC-32P50E
LC-37P50E
LC-32P50E
LC-37P50E
38
TROUBLE SHOOTING TABLE
(Continued)
<On input of the tuner (U/V)>
No picture appears on LCD during the tuner (U/V) reception.
Confirmation of the settings:
1) Is "INPUTSOURCE" button
on the remote control set up correctly? ¥¥¥ See the operation manual and set "INPUTSOURCE" to "TV".
2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS set to "MIN"? ¥¥¥ Set it to an appropriate level.
3) Is ANT-cable disconnected, or incorrectly connected? ¥¥¥ Connect it correctly as per the operation manual.
NO
NO
Is the video signal (IF) sent
from pin (11) of tuner
(TU1100)?
Check the tuner (TU1100)
and peripheral circuits.
NO
YES
YES
YES
Is video signal sent from pin
(17) of IC1104 (IF-DEMOD)?
Check SF1102 (SAW-FIL),
IC1104 and peripheral
circuits.
NO
Is the video signal (CVBS-
TUNER) sent to pin (17) of
IC1203 (V-SEL)?
YES
Is CVBS signal sent from pin (51) of IC1203?
Check IC1100 (VCA),
IC1203 (V-SEL) and
peripheral circuits.
Check 9V power line pins (6), (47) and (57) of IC1203 (V-SEL) and
peripheral circuits.
NO
YES
Is CVBS1 signal sent to pin (242) of IC3300 (V-PROCESSOR)?
Check IC3300 (V-PROCESSOR), Q3706/3707 and peripheral
circuits.
NO
YES
Is LVDS video signal (TA1± - TD1±) sent from pins (36)/(37) -
(25)/(27) of IC3300 (V-PROCESSOR), and is CLK signal
(RCLK1±) sent from pin (28)/(29)?
Check IC3300 (V-PROCESSOR) or peripheral circuits.
NO
YES
Is R/G/B digital video signal (RMS/GMS/BMS) sent from pin [27-
34]/[37-42]/[47-50] of IC4601 (LVDS-RECEIVER), and is SYNC
signal (HS/VS) sent from pin (3)/(5)?
Check IC4601 (LVDS-RECEIVER) and peripheral circuits.
NO
YES
Is digital RGB-right signal (RR**/RG**/RB**) sent from pins (203)
and (2) - (16) and (23) of IC4502 (LCD-CONTROL), and is digital
RGB-left signal (LR**/LG**/LB**) sent from pins (26) and (33) -
(47) and (54)?
YES
Check LCD connector SC4651/SC4652 or LCD-PANEL-UNIT.
Check IC4502 (LCD-CTL) and peripheral circuits.
No picture (1)
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