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TEST 3 (OLED EF Series) Power Supply Board T-CON 12V and 24V Power Check
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if Test 1 and Test 2 were OK.
Leave jumpers (A) and (B) in place. AC Power is removed at this time.
The T-CON should be connected, SMPS P202 and P203 to T-CON.
TEST 3: T-CON 24V POWER SECTION TEST:
( ) ( )
(3) (B) Add another jumper between (STBY_3.5V) pin 5 and (DRV_ON) Pin 2.
(See Fig. 3), Simulating PWR_ON, DRV_ON and 12V_ON command.
(4) Apply AC Power.
( )
(5) Check 24V on pins 8-14 on P203.
p
T-CON 24V Normal:
a) If normal (24.16V), the SMPS is OK, T-CON load test OK.
T-CON 24V Abnormal:
a) Recheck all connections.
b) Confirm the DRV_ON line pulling up to at least 3V.
c) Check SMPS P203 pins 8-14 for an excessive load, diode check should
be "0.48V" P203 connected or disconnected.
Check CN5 pins 8 14 on the T CON for an excessive load.
Check CN5 pins 8-14 on the T-CON for an excessive load.
(CN5 unplugged from the SMPS, Panel connected). Diode check should be
"OL" (Blk lead on Gnd) 0.38V (Red lead on Gnd).
(CN5 unplugged from the SMPS, Panel disconnected). Diode check
should be "OL" (Blk lead on Gnd) 0.51V (Red lead on Gnd).
See Next page to Test the Power Supply's T-CON 24V line
j
p
(
_
using a light bulb test jig.
) p
(
_
)
5
P201
SMPS TEST 3
Top Row pins
23 24
are Odd numbers
are Odd numbers
21 22
24V
19 20
24V
17 18
15 16
12V
13 14
12V
11 12
12V
9
10
STBY 3.5V
7
8
STBY 3.5V
5
6
A
A
3
3
4
4
1
2
PWR_ON
Pin 1 is Bottom on SMPS
Pin 1 is Top on Main
TIP: If you are concerned that you
may accidently connect the
jumpers in the incorrect locations
jumpers in the incorrect locations,
please use a 100 ohm 1/8W resistor
instead.
Fig 1
24V
24V
12V_ON
12V
12V
B
STBY 3.5V
Gnd
DRV_ON
C
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