Sony HDC4300 - Circuit Protection Parts; Fuses; Circuit Protection Element

1-9. Circuit Protection Parts
1-9-1. Fuses
WARNING
Fuses are essential parts for safe operation. Be sure to use the parts specified in this manual. Replacing a
fuse with an unspecified one may cause fire or electric shock.
CAUTION
Replacing any fuse is replaced while power is supplied to the unit may cause electric shock. Before replacing
any fuse, turn off the POWER switch and also disconnect the battery pack and the cable from the DC IN
connector.
This unit is equipped with fuses. The fuses blow if overcurrent flows in the unit due to an abnormality, In that case, turn
off the power of the unit, inspect inside of the unit, and then remove the cause of the overcurrent. After that, replace the
defective parts.
Board
Name
Ref. No. Address Part No. Ref. No. Address Part No. Part
Name/Rating
PS-836 F101 E1 (Side A)
1-523-190-11
Fuse (SMD) 6.3 A/250 V
F102 E3 (Side A)
1-523-190-11
Fuse (SMD) 6.3 A/250 V
F3001 D3 (Side A)
1-576-566-21
Fuse (SMD) 15 A/65 V
1-9-2. 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. Address Part No. Hold Current
CN-3427 THP1 B2 (Side A)
1-802-108-11
1.50 A/20 ℃
THP2 B1 (Side A)
1-811-201-11
2.60 A/20 ℃
MB-1278 THP1 A2 (Side A)
1-811-201-11
2.60 A/20 ℃
THP3 A1 (Side A)
1-811-201-11
2.60 A/20 ℃
THP4 B2 (Side A)
1-811-201-11
2.60 A/20 ℃
THP5 D2 (Side A)
1-803-615-21
0.50 A/20 ℃
PS-836 THP101 C1 (Side A)
1-802-108-11
1.50 A/20 ℃
RE-291 THP601 B3 (Side B)
1-803-615-21
0.50 A/20 ℃
THP602 A1 (Side B)
1-803-353-21
0.14 A/20 ℃
THP603 B1 (Side B)
1-803-615-21
0.50 A/20 ℃
MEM-147 THP001
1-803-615-21
0.5 A/20 ℃
THP002
1-803-615-21
0.5 A/20 ℃
THP003
1-803-615-21
0.5 A/20 ℃
Continued
HDC4300
1-20