Circuit Protective Parts; Circuit Protective Elements; Fuse - Sony ZRD-1 Service Manual

Display unit

Hide thumbs Also See for ZRD-1:

Operating instructions manual (18 pages)

Operating instructions manual (23 pages)

Installation manual (171 pages)

Table Of Contents

100

101

102

Table of Contents

1-2. Circuit Protective Parts

1-2-1. Circuit Protective Elements

The thermistor functions as a circuit protective element on the PS-903, UC-1 and UP-13 boards of this

unit. The positive characteristic thermistor increases the internal resistance and limits the current flowing

to the circuits when an overcurrent flows or when the ambient temperature increases and the element

reaches the specified temperature. If the elements operates, turn off the main power and inspect the inter-

nal circuit of this unit. After removing the cause of the equipment abnormality and the temperature of the

element decreases, turn on the power again, and this unit operates normally.

It takes about 1 minute for the elements to cool down after the main power is turned off.

Board name

Ref. No.

PS-903

TH001

UC-1

TH2501

TH2502

UP-13

TH001

TH002

TH003

1-2-2. Fuse

This unit has a fuse for circuit protection. A fuse will blow when abnormality occurs and an overcurrent

flows in this equipment. Be sure to replace an old fuse with the specified fuse as shown below after

removing the foreign substances that may cause the shorts.

Board name

Ref. No.

PS-903

F101

UC-1

F1501, F1502,

F1503, F1505,

F1506, F1507,

F1508, F1509,

F1510, F1511,

F1512

F1504

1-2 (E)

Sony parts No.

! 1-804-045-11

! 1-803-353-21

! 1-803-615-21

! 1-771-845-21

! 1-802-108-11

Sony parts No.

! 1-523-042-51

! 1-576-596-41

! 1-576-874-41

Parts information

Thermistor