Sharp Aquos LC-26A37M, Service Manual

Page: 28 / 92

LC-26/32A37M
6 – 5
Is the video signals (VIN1) output form pin (17)
NO
Check whether I2C is normal accessed between
of TUNER (TU201)? named TU201 and IC3001 (MAIN_MICON)
YES
Is the video signal (VIN1) sent to pin (191) of IC3001
NO
Check the line between TU201 and IC3001
(MAIN_MICON)?
YES
Refer to "The picture doesn't appear in all modes."
Is CVBS signal output from pin (8) in input terminal
NO
Check the line between J504 and IC3001
J504 to pin (188) IC3001 (MAIN_MICON)?
YES
Refer to "The picture doesn't appear in all modes"
Is Y/C signal input from pin (3)/Y and (4)/C of input
NO
Check the S_IN (J505) line and its peripheral circuits
terminal J 505
YES
Is Y/C signal output from pin (3)/Y and (4)/C connect
NO
Check the line between J505 and IC3001
to pin (184)/VIN7 and (187)/VIN6 of IC3001 (MAIN_MICON) (MAIN_MICON)
YES
Is the Y/C video signal detection function SV1JSW signal
NO
Check J505 or peripheral circuits.
from pin (6) of the input terminal J505 normal?
YES
Is the SV1JSW signal input to pin (201) of IC3001
NO
Check the line between J505 and IC3001
(MAIN_MICON)?
YES
Is Y/C signal sent to pins (184)/Y and (187)/C
NO
Check the line between J505 nad IC3001
of IC 3001 (MAIN_MICON)? (MAIN_MICON)
YES
Refer to "The picture doesn't appear in all modes"
No picture on the display (2)
Does not the picture come out when UHF/VHF is received?
No picture on the display (3)
Does not the picture of the composite video signal input go out?
No picture on the display (4)
Does not the picture of the Y/C video signal (S-video) go out?