28JW-73H (serv.man29). Intermittent tripping phosphor burn — Sharp TV Technical Bulletin (repair manual)

Model
28JW-73H (serv.man29)
Pages
1 Few pages! See other manuals at the bottom of the first or last page.
Size
33.87 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
TV / CTR / Intermittent tripping phosphor burn
File
28jw-73h-sm29.pdf
Date

View Sharp 28JW-73H (serv.man29) Technical Bulletin online

CTV2004 06 01
Date of Issue:  
12
th
 June 2004
        
Classification: 
Yellow
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
Sharp Electronics (UK) Limited
Reference – JR040604
Revision  - 3
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
28JW73H
32JW73H
28JF73H
SYMPTOM Set goes to standby on bright scenes or channel change.
Phosphor burn can occur in certain fault conditions.
CAUSE
Over sensitive beam current monitor.
ACTION
Change zener diode D1307 from a 5.2V device to a 6.1V device.
This circuit was only fitted to sets manufactured after the serial numbers given below:
28JW73H
310 872260
32JW73H
310 518287
28JF73H
310 525170
This circuit change is not applicable to models produced before these serial numbers.
Location of D1307 underneath the line output transformer (T601)
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
D1307
Zener Diode 6V1
RH-EX0584BMZZ
AA
Display

Download Sharp 28JW-73H (serv.man29) Technical Bulletin

Here you can view online or download Sharp 28JW-73H (serv.man29) Technical Bulletin in pdf. This Technical Bulletin can help you recover, restore, fix, disassemble and repair Sharp 28JW-73H (serv.man29) CTR. Information contained in Sharp 28JW-73H (serv.man29) 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).