Repair Flow Chart - Philips DELLP1230 Service Manual

78
Dell P1230 M25P
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1. Sympton :
no startup sound
LED light off
2. Sympton :
hicup mode with
startup sound or
blinking LED
check
7141/7155/7144
3. Sympton:
abnormal sound

Repair Flow Chart

check 7121 pin1
Ok
Waveform right?
NO
check
1103/6101/
7121 pin3/2103
replace 7121
Turn power off
check the resistance for
all output voltages+230,
80,+15,-15,+6.3,+5V,check
6131,6133,6134,6137,6139
No
check 7143 pin3
Ok
voltage dip
check
+5V loading current
check
Ok
frequency
check 7121 check 7121
Ok
pin 3
pin2
NO NO
check
replace 7121
3121/3123
check 7121
OK
pin 4
No
check 6125
Ok
replace 5130
check 7143 pin1
12V< pin1 < 15V
No
check
6147/5131
7135/2163
check 7121
drain waveform No
right?
Ok
replace 5130
check 7121
Ok
pin4
Ok
check
3106/3111
check 7121
pin 1
No
check 3121,3123,3125
OK
replace 5130
check
6104/3104/3105
2103/2104/3106
NO