Read Sharp VC-BS97HM (serv.man37) Technical Bulletin online
Sharp Electronics (UK) Limited
Originator AJ Supervisor Approval Date / / Reference TB930185
Revision
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
VCBS97-001
Month of Issue:
Classification: Mandatory
VIDEO TECHNICAL BULLETIN
Page 1 of 1
MODELS
VCBS97HM
SYMPTOM Reception of satillite broadcast not possible with certain types of LNB.
CAUSE
Sometimes when the VCR is powered up there is no LNB supply voltage. This is due
to a combination of component tolerance in the LNB supply regualator ( SAT PWB )
and the type of LNB load connected, which will operate a safety circuit within the VCR
causing the LNB supply to be removed.
to a combination of component tolerance in the LNB supply regualator ( SAT PWB )
and the type of LNB load connected, which will operate a safety circuit within the VCR
causing the LNB supply to be removed.
ACTION
Change R9543 ( Surface Mount Resistor ) too 1.2k.
Add R9599 as shown in the diagram.
Add D9550 as shown in the diagram.
Add a foam pad to the underside of each component to prevent shorting.
Cut printed track as shown in the diagram.
Add R9599 as shown in the diagram.
Add D9550 as shown in the diagram.
Add a foam pad to the underside of each component to prevent shorting.
Cut printed track as shown in the diagram.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
R9543
Resistor 1.2k
VRD-MN2BE122J
AA
R9599
Resistor 5.6k
VRD-RA2BE562J
AA
D9550
Zener Diode
RH-DX0053GEZZ
AA
-
Foam Pad
ZTAPEZ680010E
AA
Display
