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TROUBLESHOOTING
1.3.3 Procedure of Checking Other Main Parts
(1) High Voltage Discharge Work for Replacing Parts
<Perform this high voltage discharge work to avoid an electric shock.>
[Procedure]
(a) Check to ensure that no high voltage exists.
If LED201 is ON after start-up and LED201 is OFF after turning OFF the power source, the voltage
will decrease lower than DC50V.
(b) Connect connecting wires to an electrical solder bit.
(c) Connect the wires to terminals P and N on ISPM. => Discharging is started, resulting in hot solder
bit.
(d) Wait for 2 or 3 minutes and measure the voltage once again. Check to ensure that no voltage is
charged.
TB3
RS W
RB
VTU
NPD P
TB2
R216
R215
ZN20
LED201
ZN202
R201
R200
CN207 CN206
CN9
PC207
C
PC208
CN8
RB
N
P
P1
Solder Bit
Plug
N
P
Connecting
Wires
LED201
ISPM
Pay attention not to short-circuit between terminal P and N.
If it occurs short-circuit, it may cause a serious damage.
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