DV-3770H (serv.man11). Counter measure for tuner drift — Sharp TV Technical Bulletin (repair manual)

Model
DV-3770H (serv.man11)
Pages
1 Few pages! See other manuals at the bottom of the first or last page.
Size
9.56 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
TV / CTR / Counter measure for tuner drift
File
dv-3770h-sm11.pdf
Date

View Sharp DV-3770H (serv.man11) Technical Bulletin online

Sharp Electronics (UK) Ltd Technical Support Group
Originator ________ Supervisor_________ Approval Date ___/___/___   UK51902Y
Date :
21 December 1998
Model:
DV3770H
Ref No:
DV3770-003
Classification: Immediate
TELEVISION TECHNICAL BULLETIN
Page 1 of 1
Subject : Counter measure for tuning drift
SYMPTOM Tuner drifting/patterning.
CAUSE
Narrow AFC range.
ACTION
1.
Add a resistor R227 (220
6 FW ) from the tuner AGC pin to ground.
2.
On the underside of the PWB add a IN4148 diode between pins 5 and 15 of IC201
(cathode to pin 5).
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
220k
6 FW
VRD-RA2BE224J
AA
Diode
RH-DX0045BMZZ
AA
Display

Download Sharp DV-3770H (serv.man11) Technical Bulletin

Here you can view online or download Sharp DV-3770H (serv.man11) Technical Bulletin in pdf. This Technical Bulletin can help you recover, restore, fix, disassemble and repair Sharp DV-3770H (serv.man11) CTR. Information contained in Sharp DV-3770H (serv.man11) service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).