Read Sharp 37DT-25H (serv.man17) Technical Bulletin online
Sharp Electronics (UK) Limited
Originator AvW Supervisor Approval Date / / Reference UK82500X
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV980807
Month of Issue: August 1998
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 1 of 2
MODELS
51DT25H
37DM23H
37DT25H
SYMPTOM Counter measure to stop 'popping' from the loudspeaker at switch on.
CAUSE
Timing of muting circuit too slow.
ACTION
Check that the chassis version is N6. If it is then procede as follows.
1. Remove
C308.
2. Remove
D301.
3.
Change R316 to a 33k resistor (was 10k).
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
R316
Resistor 33k, 1/8W
VRD-RA2BE333J
AA
To R306
C302
Q305
R316
R317
R318
R318
To Q501/Q1007
Circuit Diagram after modification
Sharp Electronics (UK) Limited
Originator AvW Supervisor Approval Date / / Reference UK82500X
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
CTV980807
Month of Issue: August 1998
Classification: White
TELEVISION TECHNICAL BULLETIN
Page 2 of 2
Location of C308 on a version 6 Chassis
F7213BMN6
C308
D301
R316
T601
S701
IC1001
TU201
PWB-B
Display