Samsung SCX-6555N - Page 221

Alignment & Troubleshooting
Service Manual
4-121
Samsung Electronics
Engine isn’t warming up
& LCD does not display
anything on.
Check whether the LED on Main PBA is flickered on
(+5V Check)
OFF - +5V N.G
ON/BLINK - +5V O.K
Check +5V ON SMPS
N.G
Replace
SMPS
Each Check +24V
On Main PBA
O.K
N.G
Each Check +24V
ON SMPS
Replace Main PBA
O.K
Check +3.3V
N.G
Replace
SMPS
Replace Main PBA
O.K
N.G
Replace Main PBA
Replace SUB PBA
O.K
No Power
4.2.2.13 Troubleshooting owchart
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA