Fujitsu Siemens Computers FSC B17-1 User Manual

FSC B17-1 Service Manual
35
2.PANEL-POWER CIRCUIT
3.INVERTER Control Relative Circuit
check R302 should have response from 0V to 5V
When we switch the power switch from on to of
f
N
G
Check the PPWR panel power relative circuit,
Q301, Q302(pin 5,6,7,8)
In normal operation, when LED =green, R302
should =0 v
,
OK,R308 have res
p
onse
N
G, no Voltage
Measured the Q302 pin 5,6,7,8= 5 V?
Check U202 pin 1,2,3,4= 5V
OK
OK
Replace Q302 ( Nmos, SI9933
Yes
Measured the inveter connector CN402
Pin2 on/off control=3.3V (on)
Pin4 PWM signal control dim 0V-5V
N
G
Check the Bklt-On relative circuit, R409,
In normal operation, when LED =green,
R409 Bklt-On should =5 v,
If Bklt-On no-response when the power switch turn on-off
,
Replace U203 GM5120/2120
N
G, still no screen
Replace Power board to new-one, an
d
Check the screen is normal ??
OK
N
G Replace Power board
& Re-do white balance

Fujitsu Siemens Computers FSC B17-1 Specifications

General

Brand	Fujitsu Siemens Computers
Model	FSC B17-1
Category	Monitor
Language	English