– 14 –
The check of
a fault
Base unit
exchange
MAIN unit
exchange
Normality
Normality
YES
NO
NO
YES
The problem of
the base unit
The problem of
the base unit
main unit
SY-1 circuit
board defect
Switching
power supply
defect
A cable is
checked
Normality
Switching power
supply exchange
YES
YES
NO
NO
Normality
The problem of
the MAIN unit
The voltage
check of a power
supply board
TP301: +18 V
TP303: +18 V
TP305: +9 V
TP306: +5 V
TP307: +5 V
Voltage
normality
NO
NO
YES
YES
Power supply
board defect
MAIN board
exchange
Normality
MAIN board
defect
Camera unit
exchange
Normality
YES
NO
NO
Camera unit
defect
A harness is
checked
Motor exchange
Initializa-
tion fault
Normality
NO
NO
YES
YES
Motor defect
The gap check
of Sensor IC
and a magnet
Other parts defect
4-5. A BASE UNIT AND A MAIN UNIT ARE EX-
CHANGED AND CHECKED
It works after a power supply is surely turned off when it is
connected with the extension cable (VHJ-0154).
A circuit board is sometimes damaged when it works in
power supply on.
YES
Contents of a
problem are
camera
