LG 55EG9600 - MAKING CONNECTIONS; Connecting to a PC

LG
November 2017
55EG9600 (2015 OLED) Power Supply
TEST 1 Power Supply Board 12VM/24VS to Main Voltage Check
AC Should not be applied at any time while adding jumpers or While
unplugging connectors, damage to the circuit Board may occur.
I) When AC is applied, the SMPS “MUST” be producing
STBY 3.5V (3.52V) on pins 5 and 7, 8 of P201.
If 3.5V Standby is not being generated, the SMPS is defective
and may need to be replaced. Make sure AC is arriving at the connector SK100,
make sure 112V (HGnd) is arriving at P102 pins 11~14 and +3.5V_ST is not loaded
down by the Main Board or the Joy Stick/IR Board. Remove connector on Main
board. If STBY is still missing, SMPS is defective.
II) Unplug P2399 on the Main Board to make insertion of the Jumpers easier.
Use P2399 side to insert jumpers.
TEST 1: TESTING THE POWER SUPPLY TURN-ON CIRCUIT. (See Fig 1)
(1) Add a jumper (A) between (3.5V STBY) pin 5 and (PWR_ON) Pin 1,
(See Fig 1). Apply AC, this will turn on the SMPS. Relay click will be heard.
Check that the 24V and 12V power supplies to the Main board are turned on,
To Main Board Power:
• P201 (11.96V pins 11-15)
• P201 (23.72V pins 19-22)
(2) Remove AC power
See Next page to Test the Power Supply’s T-CON 12VT line.
No 12VT or 24VD to T-CON at this time.
TIP: If you are concerned that you may accidently connect the jumpers in the incorrect
locations, please use a 100 ohm 1/8W resistor instead.
Pin 1 is Bottom on SMPS
Pin 1 is Top on Main
SMPS TEST 1
Top Row pins
are Odd numbers
DRV_ON
Fig 1
17 18
15 16
13 14
11 12
9 10
7 8
5 6
3 4
1 2
P201
12V
12V
STBY 3.5V
24V
24V
PWR_ON
A
12V
12V_ON
23 24
21 22
19 20
STBY 3.5V
STBY 3.5V
12V
12V
24V
24V
Gnd
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