Sharp HT-DV40H (serv.man9) Service Manual / Technical Bulletin ▷ View online
DVD 2008 09 01
Date of Issue:15
th
September 2008
3
Classification: White
HOME CINEMA TECHNICAL BULLETIN
Page 1 of 3
Sharp Electronics (UK) Limited
Reference – TSI 0870002
Revision - 2
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
HT-DV40H
HT-DV50H
SYMPTOM Sub Woofer background noise.
CAUSE
Earth loop problems.
ACTION
Change the soldered position of cable end to reduce nose as per photos below.
De-solder this end of the wire from the PWB.
Figure 1. The original position for the earth wire.
DVD 2008 09 01
Date of Issue:15
th
September 2008
3
Classification: White
HOME CINEMA TECHNICAL BULLETIN
Page 2 of 3
Sharp Electronics (UK) Limited
Reference – TSI 0870002
Revision - 2
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
Red – Carry out on all units
Other end of wire this end is unchanged.
Figure 2.
New position for unsoldered wire end.
Apply hot glue to retain
wires in this position
wires in this position
.
DVD 2008 09 01
Date of Issue:15
th
September 2008
3
Classification: White
HOME CINEMA TECHNICAL BULLETIN
Page 3 of 3
Sharp Electronics (UK) Limited
Reference – TSI 0870002
Revision - 2
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
Red – Carry out on all units
Remove wire end from here.
Resolder wire end to this point.
Figure 3. PWB layout for wiring change.
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