Service manual

6.1. NO POWER
6.2. MCU NO FUNCTION
12V
POWER
STAR
CHECK
5V O/P
T801
CHECK
I902
CHECK
P901~P904
PANEL
CHECK
12V O/P
C823
CHECK F801
D801 C805
CHECK
I801
Q801
CHECK
D823
D822
CHECK I901
Q905, Q911
Q907, Q908
Q909, Q910
CHECK
T901, T902
Y
MAIN
BOARD
5V
12V
CHECK
VCC5V
OK?
CHECK
PIN40
D807,I801,I801
3.3 V ?
N
CHECK
OK?
CHECK
PIN18,
OK?
D807,I801,I801
CHECK
PIN14,PIN15
CLOCK OK?
Y
CHECK
D109,D110,D112
Y CHECK
X101, C126
C127 OK?
Y CHECK TRACE
RP04 RP05
OK?
L804,D823,D822
I102
12 MHZ
D807,I801,I801
CHECK
I102,EVERY TWO PIN
SHORT?
Y CHECK
KEYPAD
P103 OK?
CHECK
RESET
N
CHECK
C123,R125,D107
N
N
N
N
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