76FW-54H (serv.man22). Set will trip (re-boot) once the picture appears - Sharp TV Technical Bulletin (repair manual)

76fw-54h (serv.man22) technical bulletin
Model
76FW-54H (serv.man22)
Pages
1 Few pages! See other manuals at the bottom of the first or last page.
Size
11.86 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
TV / CTR / Set will trip (re-boot) once the picture appears
File
76fw-54h-sm22.pdf
Date

Read Sharp 76FW-54H (serv.man22) Technical Bulletin online

CTV2003 04 06
Month of Issue:  
April 2003
        
Classification: 
White
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
Sharp Electronics (UK) Limited
Reference JR29042003-2
Revision 2
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
 Red – Carry out on all units
MODELS
59ESD7H
66ESD7H
66FW54H
76FW54H
SYMPTOM Set will trip (re-boot) once the picture appears, if plug SA is disconnected from the
Dolby PWB the set will work correctly
Note:
Sound will only appear if By-Pass mode has been select in the Audio menu.
CAUSE
Dolby power supply not operating
ACTION
Normally this is due to R1721 and R1722, in the Dolby PWB power supply circuit
going high or open circuit.  However, a similar fault can be experienced if any of the
output IC's (IC1302, IC1303, IC1304 and IC1305) go short circuit, causing an overload
of the Dolby power supply.
NOTE
R1721 and R1722 have been changed in value during production.  Use the part
number listed below to order these parts.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
R1721
Resistor, 560K  0.5W
VRC-MA2HG564J
AA
R1722
Resistor, 560K  0.5W
VRC-MA2HG564J
AA
IC1302
IC, TDA7480
VHITDA7480/-1
AK
IC1303
IC, TDA7480
VHITDA7480/-1
AK
IC1304
IC, TDA7480
VHITDA7480/-1
AK
IC1305
IC, TDA7481
VHITDA7481/-1
AK

Download Sharp 76FW-54H (serv.man22) Technical Bulletin

Here you can read online and download Sharp 76FW-54H (serv.man22) Technical Bulletin in PDF. 76FW-54H (serv.man22) technical bulletin will guide through the process and help you recover, restore, fix, disassemble and repair Sharp 76FW-54H (serv.man22) CTR. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.