Repair Instructions - Philips DVP642/37 Service Manual

REPAIR INSTRUCTIONS

A B
ALL FUNCTION VFD DISPLAY NO SHOW
NO WORKING ANY KEY FUNCTION
A
All function
no working
Check all system
OK
Re-insert and
all cable is loose
fix the cable
or bad INT
Check power
No
Power standy
PCB F901
LED show
damange
working or Not
Yes
Check CN901
5V if right
work
Check control
PCB standy circuit
No
Check CN105
Check switch
VCC = 5V
power circuit (B)
VCC = 5V
check
Yes
VCC = 3.3V
33
VDD = 1.5V
Yes
Check all voltage
Check U103 Pin 203
3.3V and 1.5V
Pin 186 Osc
give circuit
freq 27MHz
Yes
Repair Main PCB
between U104 &
U103 circuit
2-2
MAIN UNIT REPAIR CHART 1/2
C
POWER SUPPLY
NO WORKING
B
VFD display no show
any key fuction
Reject Check control PCB
Change
CN104B cable
F901
loose or INT
No Check +5V
No
power supply
circuit
Check test CN104B
Pin 8 = -24V
Pin 11= 5V
Pin 9,10 = AC3.5V
Yes
Check test CN104B
Pin 4/CLK, Pin 5/DAT A
and Pin 6/CE
No
Check VFD
control PCB
section damange
D
AUDIO LINE
NO OUTPUT
Power supply
No working
Yes
Re-insert and
fix the cable
All voltage
No No output
Check power PCB
power supply circuit
Check F901
Check U103
and IC2500
Change F901
2-2
E
DIGITAL LINE
DVD NO
NO OUTPUT
C
+12V No output
+5V No output
-24V No output
damage
F
VIDEO
Check D902
and its conjoint
part
Check D910 and its
conjoint part
Check D904 and its
conjoint part