Circuit Protection Parts; Circuit Protection Element - Sony PZW-4000 Service Manual

1-4. Circuit Protection Parts

1-4-1. 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.
AU-382 TH500
TH900
TH901
TH902
TH903
TH904
DIF-267 TH100
FP-166 THP201
IF-1351 TH301
KY-656 THP901
MEM-138 THP100
MB-1247 TH101
TH102
TH103
TH104
TH105
TH106
TH1501
TH1502
TH1503
TH1504
TH2001
TH2002
TH2003
TH3001
TH4501
TH4502
TH4503
TH4504
TH4505
TH4506
TH4507
TH4508
TH4509
TH4510
TH4511
TH4512
TH4513
TH4514
TH4515
TH4516
TH6001
Address Part No.
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1-802-108-11
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1-805-868-11
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1-805-868-11
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1-805-868-11
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1-805-868-11
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1-805-868-11
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1-802-108-11
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A-2/Side A 1-803-353-21
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1-533-817-21
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H-5/Side A 1-802-108-11
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1-533-817-21
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K-1/Side A 1-811-201-11
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G-1/Side A 1-811-201-11
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K-4/Side A 1-811-201-11
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J-4/Side A 1-803-615-21
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D-7/Side A 1-811-201-11
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K-1/Side B 1-803-615-21
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B-1/Side A 1-802-108-11
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E-5/Side A 1-802-108-11
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E-5/Side A 1-802-108-11
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A-1/Side A 1-802-108-11
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H-11/Side A 1-803-615-21
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G-11/Side B 1-811-201-11
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H-11/Side B 1-771-075-21
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G-11/Side A 1-771-075-21
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A-10/Side A
1-803-615-21
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B-10/Side A 1-803-615-21
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B-10/Side A 1-803-615-21
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D-10/Side B 1-803-615-21
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A-10/Side A 1-811-201-11
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B-10/Side A 1-811-201-11
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J-3/Side A
1-803-615-21
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J-3/Side A 1-803-615-21
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J-2/Side A 1-803-615-21
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J-2/Side A
1-803-615-21
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K-3/Side A 1-811-201-11
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K-3/Side A 1-811-201-11
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K-2/Side A 1-811-201-11
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K-2/Side A 1-811-201-11
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B-10/Side A 1-811-201-11
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C-10/Side A 1-811-201-11
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H-11/Side A 1-771-075-21
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Holding Current
1.50 A/20 °C
0.75 A/20 °C
0.75 A/20 °C
0.75 A/20 °C
0.75 A/20 °C
0.75 A/20 °C
1.50 A/20 °C
0.14 A/20 °C
1.10 A/20 °C
1.50 A/20 °C
1.10 A/20 °C
2.60 A 20 °C
2.60 A 20 °C
2.60 A 20 °C
0.50 A/20 °C
2.60 A 20 °C
0.50 A/20 °C
1.50 A/20 °C
1.50 A/20 °C
1.50 A/20 °C
1.50 A/20 °C
0.50 A/20 °C
2.60 A 20 °C
0.75 A/20 °C
0.75 A/20 °C
0.50 A/20 °C
0.50 A/20 °C
0.50 A/20 °C
0.50 A/20 °C
2.60 A 20 °C
2.60 A 20 °C
0.50 A/20 °C
0.50 A/20 °C
0.50 A/20 °C
0.50 A/20 °C
2.60 A 20 °C
2.60 A 20 °C
2.60 A 20 °C
2.60 A 20 °C
2.60 A 20 °C
2.60 A 20 °C
0.75 A/20 °C
18