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Trouble Shooting
Power LED
Blink
Trouble
LED
11
times
blink
Trouble
Mode
and
Defective
Board
Trouble
Mode
Defective
Board
Fan
SOS
PB
Board,
FAN
How
to find
the defective
board
Power
Supply and
Protection
Circuit
23
LED
12 times
blink
Trouble
Mode
and
Defective
Board
Trouble
Mode
Defective
Board
Speaker
10,
9V
short
Z,
PB
Board
How
to find
the defective
board
Disconnect
PA7
(or
PB7).
Power ON.
No
<ClO_Vo_utput
at _PB7'_s_
1
_o_r_2
pirP>
»|PB Board
!9V
output
at
PB7's 5
or
6
pin
before Shut'down ?
X
[500
series
only|
[z
Board
|
Power
Supply and
Protection
Circuit
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