Sharp DV-3751H (serv.man16) Service Manual / Technical Bulletin ▷ View online
Sharp Electronics (UK) Ltd Technical Support Group
Originator ________ Supervisor_________ Approval Date ___/___/___ UK44200X
Date :
21 December 1998
Model:
DV5131H
Ref No:
DV5131-006
Classification:
Routine
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
Subject : Poor teletext reception
SYMPTOM Teletext not functioning on Channel 4 on certain transmitters only.
CAUSE
Alterations to teletext specifications.
ACTION
Carry out the following circuit alterations to the video PWB using the parts listed below:
1.
Remove SMD capacitor C874.
2.
Remove SMD resistor R830.
3.
Remove diode D810.
4.
Replace SMD resistor R825 (2.2k
6) with a SMD 1.8k6.
5.
Add 100pF capacitor (on copper side of PWB) across R871.
6.
Fit a 100pF SMD capacitor in position marked C240.
7.
Re-assemble and test.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
R825
1.8K
6 1/10W SMD resistor
VRS-TV1JD182J
AA
C240
100pF SMD capacitor
VCCSTV1HL101J
AA
Extra capacitor
100pF Ceramic capacitor
VCCSPA1HL101J
AA
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