Page 1
566LM Service Manual
10. TROUBLE SHOOTING FLOW CHART
10.1. NO POWER
Start
5V
on
C101
Y
I101
is
Failed?
N
5V
on
C314,C319
Y
9.2V
on
C323
N
Y
N
I118,Q101,I107
N
Check
D804,D807,
I801,I802,I803
D801,F801
Replace
I101
Check
Check
D323,Q109,
L177,I119
Y
-6V
on
C315
Y
Check
D113,D114,D115,
I121,Q116,Q117,F101,F102
-27-
Check
D111,D112,
Q105,I120
5/20/2002
N
Page 2
566LM Service Manual
10.2. MCU NO FUNCTION
5V
on
Pin44 of
I107
Y
Check
Pin 10 of
I107 is
Low level
Y
12MHz
Clock on Pin20
&21 of I107
Check
N
N
N
D804,D807,
I801,I802,I803
D801,F801
Check
C163,C162,
D110,R160
Check
X101
Y
Check I2C
Pin3,4 of I107
are high level
Check
Keypad and P104
-28-
N
Check Trace is
Opened or Shart
to I108 and I109
5/20/2002
Page 3
10.3. NO DISPLAY
566LM Service Manual
Power
Key
Work OK?
Y
High Level
on
C151 ?
Y
H/V Sync
on Pin13,129 of
I109
Y
Check
R.G.B data
on bus of
I106
N
N
N
N
Check
Keypad
N
Check P701
Check Q118,I107
Check
I102 is
failed ?
Y
Replace I102
Check
R.G.B input
on I106
Y
N
Y
Refer to
No Power
Check
D108,D109,
R120,R121,P109
Replace
I106
Y
Check
14.318MHz on
Pin 9,10 of
I109
Y
Check
R.G.B data on
output bus of
I109
Y
Check
STH1,POL,LP,
CKH,CLKV,STV1
on I109
Y
Check P113,P114
and inverter unit
N
Check I/O Cable
N
N
N
Check
X102
Check
I109
-29-
5/20/2002
Page 4
10.4. LOSE COLOR
Some bits
lost
566LM Service Manual
Check
R122,R124,R129,
R131,R135,R138
and I106
Y
Check
L108~L124
L126~L141
L143~L159
and I109
Y
P113,P114
poor soldering
Lose color
R.G or B
N
N
I106 or
R-pack
re-soldering
I109 and
L108~L159
re-soldering
Check
I/O cable
Pin 1,2,3
Y
Check
R105,R106,R107,
R108,R109,R110
Y
I106,I109 fail
or poor soldering
N
N
PC connection
Wrong Components
or poor soldering
Check your
or Pin break
-30-
5/20/2002
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