Trouble Shooting Guide - Gateway FPD 1500 Service Manual

TROUBLE-SHOOTING GUIDE
NO POWER
(POWER INDICATOR OFF)
CHECK
J101 PIN1
INPUT VOLTAGE
24V ?
YES
CHECK
U50 PIN 1
INPUT VOLTAGE
24V ?
YES
CHECK
5VST VOLTAGE
5V ?
YES
CHECK
+5V VOLTAGE
5V ?
YES
CHECK
+3.3V VOLTAGE
3.3V ?
YES
CHECK
+24V_INV VOLTAGE
24V ?
YES
CHECK
+5V_MOD VOLTAGE
5V ?
YES
TROUBLE IN
U101
1. NO POWER
NO
NO
NO
NO
NO
NO
NO
- 9 -
TROUBLE IN
AC/DC ADAPTER
TROUBLE IN
J101, J102
TROUBLE IN
U102, U103
TROUBLE IN
Q101, Q102
TROUBLE IN
U104
TROUBLE IN
Q403, Q401
TROUBLE IN
Q402, Q401