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