Read Sharp 28JW-73H (serv.man28) Technical Bulletin online
CTV2004 01 03
Month of Issue: 11
th
August 2004
Classification:
White
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
Sharp Electronics (UK) Limited
Reference – JR 10 01 2004
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
28JF73H
28JW73H
SYMPTOM Dead.
CAUSE
Breakdown of T602, leading to failure of C607.
ACTION
In most cases, replacing T602 and C607 will cure the problem, if further problems
ensue (geometry faults, repeat failure of C607 etc) then R512, R513, R514, C508 and
IC501 may have failed.
ensue (geometry faults, repeat failure of C607 etc) then R512, R513, R514, C508 and
IC501 may have failed.
Notes
•
Failure of R512, R513 and R514 can lead to discoloration of the PWB. Repair the
PWB as necessary.
•
R513 is not fitted in the JF version of this chassis
•
The flyback transformer fitted to the JW and JF models are different - it is important
to ensure that the correct type is fitted.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
C508
Capacitor, 1nF 500V
VCKYPA2HB102K
AB
C607
Capacitor, 0.1
µ
F 250V
VCFYAA2EA104J
AC
IC501
IC, UPC358
VHIUPC358C/-1
AE
R512
Resistor, 1k
Ω
VRD-RA2BE102J
AA
R513
SMD resistor, 6.8M
Ω
VRS-CY1JF685J
AA
R514
Resistor, 1k
Ω
VRD-RA2BE102J
AA
T602
Flyback transformer - JW models
RTRNFA013WJZZ
BB
T602
Flyback transformer - JF models
RTRNFA014WJZZ
BB
Display
