Backlight Quick Test - Samsung QN65Q9FNAF Service Manual

4. Troubleshooting

4-3-7. Backlight Quick Test

• One Connect Power Supply to TV SMPS
ONE CONNECT BOX
FAIL_COUNT
POWER_LOW
A13V GND
A13V
A13V
GND
N.C
B350V
B350V
N.C
B_GND
ONE CONNECT BOX
„
1. Remove AC Power to the OCB & Remove Cover (follow Disassembly Procedure).
2. Connect Discharge Tool across leads of each large Capacitors to remove its charge.
3. Remove Connector CNM803 .
4. Connect TV Backlight Test Cable
4-14
CNM803
CNM803 (POWER)
2 1 IR_SMPS
4 3 PS_ON
6 5 GND
8 7 A13V
10 9 A13V
12 11 GND
14 13 N.C
16 15 B350V
18 17 N.C
20 19 B_GND
Discharge Tool
to Supply 350Vdc & 13Vdc directly to the TV Panel.
CNM803A
LD/SMPS A
Backlight Test Cable
CNM803 CNM803