Read Sharp 76DW-18H (serv.man2) Service Manual online
Sharp Electronics (UK) Limited
Reference UK84602X
Revision 1
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV991003
Month of Issue: October 1999
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
MODELS
66DW18H
76DW18H
SYMPTOM Failure of Q509.
CAUSE
Excessive excursions of the positive forty volt supply from the line stage.
ACTION
Fit an extra zener diode, D632, in the position of R626 as shown in the diagram below.
Note that this diode has been fitted during production as of the following serial
numbers.
numbers.
66DW18H -
712620
76DW18H
-
714463
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
D632
Zener diode, 47V
RH-EX0431BMZZ
AA
40V
R611
D608
D632
C621
R626
Sharp Electronics (UK) Limited
Reference UK93000X
Revision 1
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV991004
Month of Issue: October 1999
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
MODELS
66DW18H
76DW18H
SYMPTOM The reciever does not turn on - mains fuse blown.
CAUSE
Bridge rectifier diodes short circuit (D701, D702, D703 and D704).
ACTION
Replace D701, D702, D703 and D704 with the part specified below.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
D701
Diode, RM4ALF-L1
RH-DX0317BMZZ
AD
D702
Diode, RM4ALF-L1
RH-DX0317BMZZ
AD
D703
Diode, RM4ALF-L1
RH-DX0317BMZZ
AD
D704
Diode, RM4ALF-L1
RH-DX0317BMZZ
AD
New
Old
D703
D701
D704
D702
Click on the first or last page to see other 76DW-18H (serv.man2) service manuals if exist.