1-9. Circuit Protection Parts
1-9-1. Circuit Protection Element
This unit is provided with positive thermistors for power circuit. If an over current 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 Ref. No. Address Part No.
KY-671 THP1 A-6/Side B
1-802-243-11
MIX-54 THP1 M-1/Side A
1-804-458-21
THP2 L-1/Side A
1-804-458-21
1-9-2. Replacing Fuse
WARNING
The fuse is essential parts for safe operation. Replace the components with Sony parts whose part numbers
appear in the manual published by Sony. If the components are replaced with any parts other than the
specified ones, this may cause a fire or electric shock.
CAUTION
If the fuse is replaced while the main power is kept on, this may cause electric shock. Before replacing the
fuse, not only turn off the POWER switch but also disconnect the cable that is connected to the AC IN
connector.
This unit is equipped with fuses.
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 Ref. No. Address name Parts No.
KY-671 F1 F-2/Side B Fuse (5 A/125 V)
1-533-627-21
F2 F-2/Side B Fuse (5 A/125 V)
1-533-627-21
F3 F-2/Side B Fuse (5 A/125 V)
1-533-627-21
MIX-54 F2100 A-1/Side A Fuse (10 A/125 V)
1-576-329-21
F2101 A-4/Side A Fuse (10 A/125 V)
1-576-329-21
F2102 F-6/Side A Fuse (10 A/125 V)
1-576-329-21
F5200 N-1/Side A Fuse (15 A/65 V)
1-576-566-21
F5201 N-9/Side A Fuse (15 A/65 V)
1-576-566-21
MCS-8M
1-40
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