28HW-53 (serv.man15). IC1300 on the centre speaker PWB runs hot or the set is dead. (revision 4) — Sharp TV Technical Bulletin (repair manual)

Model
28HW-53 (serv.man15)
Pages
2 Few pages! See other manuals at the bottom of the first or last page.
Size
115.54 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
TV / CTR / IC1300 on the centre speaker PWB runs hot or the set is dead. (revision 4)
File
28hw-53-sm15.pdf
Date

View Sharp 28HW-53 (serv.man15) Technical Bulletin online

CTV2002 06 01
Month of Issue: 
October 2003
        
Classification: 
YELLOW
TELEVISION TECHNICAL BULLETIN
Page 1 of 2
Sharp Electronics (UK) Limited
Reference SP021100XJC
Revision 4
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
28HW53H
32HW53H
66GF63H
66GF64H
76GF63H
76GF64H
66FW53H
76FW53H
SYMPTOM IC1300 on the centre speaker PWB runs hot or the set is dead set due to IC1300 or
IC1302 causing a short circuit on the +/-16V supplies.
ACTION
Carry out the following as necessary.
1.  Add jumper wires JL2 and JL3 as shown in Figure 2 on page 2 below to reduce the
running temperature of IC1300.
2.  Check IC1302 for short circuit across the supply and replace as necessary.
3.  Check for and if necessary re-solder dry joints on C1306.
4. 
Also check the condition of IC1300 and replace if necessary.
Notes
1.  If the track is cut below IC1300 and jumper link JL1 is fitted (as in Figure 1 on page
2) it is not necessary to carry out the modification as detailed in figure 2.  The
parts required for this improvement are listed in the table below.
2.  There are two versions of this PWB.  Pro Logic models are not fitted with IC1300.
3.  In the case of a dead set, caused by short circuit IC1300, it is possible to run the
set by completely disconnecting the centre speaker PWB.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
JF2
Jumper
VRS-TV1JD000J
AA
JF3
Jumper
VRS-TV1JD000J
AA
IC1300
IC, BA4558F
VHIBA4558F/-1
AC
IC1302
IC, TDA7480
VHITDA7480/-1
AK
I
CTV2002 06 01
Month of Issue: 
October 2003
        
Classification: 
YELLOW
TELEVISION TECHNICAL BULLETIN
Page 2 of 2
Sharp Electronics (UK) Limited
Reference SP021100XJC
Revision 4
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
 Red – Carry out on all units
Page of 2
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Download Sharp 28HW-53 (serv.man15) Technical Bulletin

Here you can view online or download Sharp 28HW-53 (serv.man15) Technical Bulletin in pdf. This Technical Bulletin can help you recover, restore, fix, disassemble and repair Sharp 28HW-53 (serv.man15) CTR. Information contained in Sharp 28HW-53 (serv.man15) service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).