55UB9500 - Panel PSU Voltage Checks
AC Should not be applied at any time while adding jumpers or While
unplugging connectors as damage to the circuit Board may occur.
a) When AC is applied, the SMPS “MUST” be producing
3.5V on pins 5, 7 and 8 of P201 SMPS or (P13002 Main).
Front pins on Connector are
Odd number
24V
23 24
21 22
19 20 24V
24V 24V
If the 3.5V is not being generated, the SMPS is defective
and must be replaced. There is no need to continue with the
next test. But, make sure AC is arriving at the connector SK100.
(P13002 on theMainBoardtomakeinsertionoftheJumperseasier.
17 18
15 16
13 14
11 12
12V
12V
24V
12V
b) Unplug the Main Board to make insertion of the Jumpers easier.
Use P13002 Side to insert the jumpers.
TEST 1: Testing the Power Supply turn on circuit.
(1) (A) Add a jumper between (3.5V) pin 5 and Pin 1 (PWR_ON).
9 10
7 8
5 6
STBY 3.5V
STBY 3.5V
STBY 3.5V
12V 12V
Apply AC, (See Fig 1). This will turn on the power supply, no relay will be heard.
Check that the 24V and 12V power supplies are turned on.
Main Board Power:
• P13002 (11.95V pins 11-15)
• P13002 (23.61V pins18-22)
Backlight N B klihtdithitt
PWR_ON
Power:
• Test Point P13002: 47.85V at this time.
