TITLE
Service Manual
LCD TV For 237-T11
Doc No. SM_237-T11_19Nov07
Version 1.2
Page 13/72
Company Confidential-DRAFT
4-2 Abnormal Power On/Off
Off
Shut down
Source can’t
switch
Abnormal Power
On/Off
No Power
Replace System
board
Replace Keypad
board
Fail
Replace Power
supply
Fail
Fail
OK
OK
Test
Finish
Trouble Condition Check Item
Replace Material
Test
Step3
Check System Board
CN1 pin1 to ground = 5Vs,
and pin3 to ground = 5V,
Check D4, D64 lighting?
Step2
Check Keypad board
CN1-pin1 to ground =
5V or Check D1
Step1:
Check Power Supply, Con.
J101–pin 1 to ground = 5V
Con CN1 pin 3 to ground =
5V
Note: Before
proceeding
confirm that
Power cable is
connected and
that proper
voltage is being
fed to TV. (Check
power switch
located next to
power input and
confirm that it’s
ON.)
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