VC-M311HM (serv.man11). Counter measures for automatic start up (intermittent tape rewinding) — Sharp VCR Technical Bulletin (repair manual)

Model
VC-M311HM (serv.man11)
Pages
1 Few pages! See other manuals at the bottom of the first or last page.
Size
163.88 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
VCR / Counter measures for automatic start up (intermittent tape rewinding)
File
vc-m311hm-sm11.pdf
Date

View Sharp VC-M311HM (serv.man11) Technical Bulletin online

Sharp Electronics (UK) Limited
Reference TB-T9909072
Revision  1
White – Carry out as required, Yellow – Carry out as required and whenever the unit comes in for service, Red – Carry out on all units
VCR991001
Month of Issue: October 1999
        Classification:                White
VIDEO TECHNICAL BULLETIN
Page 1 of 1
MODELS
VCM301HM
VCM311HM
VCM311AHM
VCM321HM
VCM331HM
VCMH711HM
VCM721HM
VCMH73HM
VCMH730HM
VCMH731HM
SYMPTOM
In certain circumstances, it may be possible for the VCR to start up automatically from
the standby mode.  Normally the machine enters the playback mode (if a tape is
inserted), plays to the end then rewinds and returns to standby.
CAUSE
This problem can be caused by a number of reasons
1. Noise on the operate PWB (normally when the display reads 1:16:11 pr1).
2. Erratic operation of the start and/or end sensor.
3. Dry joints on IC701.
ACTION
Take the following remedial action.
1. Fit SMD capacitors C810 and C812 to the PWB.
2. Replace the start and end sensors.
3. Reflow the solder on IC701.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
C810
Capacitor, 120pf SMD
VCCCCY1HH121J
AA
C812
Capacitor, 120pf SMD
VCCCCY1HH121J
AA
Note that C810 and C812 are located at the front edge of the Main PWB (left hand side as
viewed from the front of the machine)
Display

Download Sharp VC-M311HM (serv.man11) Technical Bulletin

Here you can view online or download Sharp VC-M311HM (serv.man11) Technical Bulletin in pdf. This Technical Bulletin can help you recover, restore, fix, disassemble and repair Sharp VC-M311HM (serv.man11) VCR. Information contained in Sharp VC-M311HM (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).