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1-7.
Circuit Protection Part List
1-7-1.
Circuit Protection Element
This unit is provided with positive thermistors for power circuit.
If an overcurrent flows in a positive thermistor or it heats up to a certain degree with the increase of the ambient
temperature, its internal resistance increases sharply to limit the current flowing in the circuit. When a thermistor is
activated, turn off the power and check the circuit of the unit.
After the cause of the problem is removed and the device cools down, turn on the power again. The unit will work
normally. It takes about one minute for the device to cool down after power-off.
Board Name
Ref. No.
SY-422A
THP001
1-7-2.
Replacing Fuses and IC Links
WARNING
The fuse and IC link are essential parts for safe operation. Replace it with one whose part number is listed
in the manual. If the components are replaced with any parts other than the specified ones, this may cause
a fire or electric shock.
CAUTION
Replacing any fuse or IC link is replaced while power is supplied to the unit may cause electric shock.
Before replacing any fuse or IC link, turn off the POWER switch and also disconnect the cable from the AC
IN connector.
This unit is equipped with fuses and IC links.
The fuses blow if an excessive current flows due to abnormality inside the equipment. If fuses blow, turn off the main
power of the equipment once, and inspect inside of the equipment and remove the cause of excessive current. After that,
replace the fuses.
Board Name
Ref. No.
CP-407A
F201
F1201
DIO-95
F101
DM-154
F101
HP-160A
F1
F2
LED-528
PS100
MDC-19
F001
MEC-40
F200
SY-422A
F2301
PWS-4400
Address
A-10/Side A
Address
Name
D-1/Side A
Fuse (5 A/125 V)
C-4/Side A
Fuse (5 A/125 V)
K-1/Side B
Fuse (10 A/125 V)
D-1/Side A
Fuse (5 A/125 V)
A-3/Side A
Fuse (5 A/125 V)
B-3/Side A
Fuse (5 A/125 V)
Side B
IC link (0.4A /72V)
F-3/Side A
Fuse (4 A/125 V)
B-5/Side A
Fuse (5 A/125 V)
J-1/Side A
Fuse (5 A/125 V)
Part No.
1-804-458-21
Part No.
1-533-627-21
1-533-627-21
1-576-329-21
1-533-627-21
1-533-627-21
1-533-627-21
1-576-122-21
1-576-270-21
1-533-627-21
1-533-627-21
1-30
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