Repair Instructions - Philips HTS3357/12 Service Manual

REPAIR INSTRUCTION (Part One)
A
B C
Power Supply All Function
All Function
No Working No Sound
No Working
A
All function
No working
YES
Check all system Re-insert and fix
all cable is loose
the cable
or bad INT
NO
NO
Panel stanby LED Check back power PCB
show working or Not F901 bad cause damage
Check CN905 2pin
BK5V if right
Check repair control
WORK
PCB Standby circuit
NO
Check repair switch
Check RB901 1pin
power circuit ( See B)
+5V=5V
VCC=5V
CHECK
VD33=3.3V
VD18=1.8V
CORRECT
Check all Voltage
YES Check IC208 Pin234 OSC
3.3V and 1.8V
frequency 27MHz)
give circuit
Repair main pcb between
IC202 IC206 IC208and IC602
circuit
2 - 1
MAIN UNIT REPAIR CHART 1/3
D
E
F G
Ipod input Audio line IN Wireless
DVD Audio
No Sound
No Output No Output
No Sound
BAD
Change F901
OK
NO
Check +5V power
supply circuit
YES
YES
H I L
COAXIAL In
MP3 In Tuner No Sound
No Sound
No Sound
B
Power Supply +39V Voltage
No Output
No working
All Voltage No -27V Voltage
No Output
No Output
+12V Voltage
No Output
YES
Check F901
+5V Voltage
Bad Cause Damage
No Output
BK5V Voltage
No
No Output
Check BK5V +5V No Check Repair IC901 IC902
Working or Not And Its conn circuit
2 - 1
P
M O
No Svideo Output HDMI No Output No CVBS Output No Y Pr Pb output
Check Q901 Q909 IC901 All Function
And Its Conjoint Part
No Sound
Check Q912 IC902 Check POWER IC
And Its Conjoint Part
Voltage +39V
Check Q912 IC902
Check Q305 C
And Its Conjoint Part
Voltage 3.3V
Check Q912 IC902
Check Q902 C
And Its Conjoint Part
Voltage 3.3V
Check Q912 IC902
Check IC505 51PIN
And Its Conjoint Part
HIGH(3.3V) OR LOW(0V)
Check IC501 IC502 IC503 IC504
And Its Conjoint Part
Q
R S
KARAOKE In NO SCART OUTPUT
No Sound
C
Yes
No
See Contents B
OK
CheckQ306 D304 ZD303
No
And Its conn parts
OK
CheckQ902 ZD905 IC505
No
And Its conn parts
OK
CheckQ501 Q502 IC505
LOW
And Its conn parts
Yes