Sony PMW-PZ1, Service Manual

Page: 18 / 78

1-5. Circuit Protection Parts
1-5-1. 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 any fuse, turn off the POWER switch and also disconnect the cable from the DC 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 Name Ref. No. Part No. Part Name/Rating
HPR-56 F201
1-523-144-31
Fuse 5 A/32 V
F202
1-576-603-31
Fuse 3.15 A/24 V
F203
1-576-603-31
Fuse 3.15 A/24 V
F205
1-576-603-31
Fuse 3.15 A/24 V
F206
1-576-603-31
Fuse 3.15 A/24 V
F207
1-576-603-31
Fuse 3.15 A/24 V
IF-1277 F101
1-533-627-21
Fuse 5 A/125 V
1-5-2. Circuit Protection Element
This unit is equipped with positive-characteristic thermistors (power thermistors) as circuit protection elements.
The positive-characteristic thermistor limits the electric current flowing through the circuit as the internal resistance
increases when an excessive current flows or when the ambient temperature increases.
If the positive-characteristic thermistor works, turn off the main power of the unit and inspect the internal circuit of the
unit. After the cause of the fault is eliminated and the positive-characteristic thermistor is cooled down, turn on the main
power again. The unit works normally. It takes about one minute to cool down the positive-characteristic thermistor
after the main power is turned off.
Board
Name Ref. No. Part No. Part Name/Hold Current
HPR-56 TH5601
1-533-817-21
Thermistor 1.10 A/20
℃
TH6201
1-533-817-21
Thermistor 1.10 A/20
℃
IF-1277 TH601
1-802-264-11
Thermistor 2.6 A/20
℃
TH602
1-802-264-11
Thermistor 2.6 A/20
℃
PMW-PZ1
1-10