Sharp LC-65D90U, Service Manual

Page: 47 / 167

47
LC-65D90U
TROUBLE SHOOTING TABLE
(Continued)
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
Onscreen noises with QS drive on
Get started in the monitor process and enter "01" for
PATTERN3 on PATTERN PAGE1. Does noise appear?
Enter "21" for PATTERN3 on PATTERN PAGE1. Does noise
appear? Check the line between IC4101 and IC4102 and that
between IC4201 and IC4202, and their peripheral circuits.
Enter "11" for PATTERN3 on PATTERN PAGE1. Does noise
appear? Check the line between IC4101 and IC4103 and that
between IC4201 and IC4203, and their peripheral circuits.
Is the setting on the right of LCD PAGE2 in the process
adjustment mode "T255"?
Check IC4101, IC4201 and their peripheral circuits.
Is the cable properly connected between motor PWB and
TCON-TOP PWB?
Reconnect the cable or replace the cable with new one.
Is there a voltage of 3.3V at pin (75) of IC2301
(Microprocessor: main PWB)?
Thermistor on TCON-BOTTOM PWB defective.
Pin (75) of IC2301 defective.
Check the following and their peripheral circuits: L4101 thru
L4105, L4201 thru L4205, SC4201, SC6201, FPC, LVDS_
unit, SC6202, SC6302, FPC and TCON_BOTTM unit.