VC-M311HM (serv.man10). Countermeasure to VCR automatically starting up from standby. (Addition to VCR991101) — Sharp VCR Technical Bulletin (repair manual)

Model
VC-M311HM (serv.man10)
Pages
1 Few pages! See other manuals at the bottom of the first or last page.
Size
12.91 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
VCR / Countermeasure to VCR automatically starting up from standby. (Addition to VCR991101)
File
vc-m311hm-sm10.pdf
Date

View Sharp VC-M311HM (serv.man10) Technical Bulletin online

VCR2000 03 01
Month of Issue:  
March 2000
        
Classification: 
White
VIDEO TECHNICAL BULLETIN
Page 1 of 1
Sharp Electronics (UK) Limited
Reference TBT0002086
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
MODELS
VCM301HM
VCM311HM
VCM311AHM
VCM321HM
VCM331HM
VCMH711HM
VCMH721HM
VCMH73HM
VCM730HM
VCMH721HM
SYMPTOM This is an addition to technical bulletin number VCR991101.
In certain circumstances it may be possible for the VCR to automatically start up from
standby mode.  The VCR can start up automatically, play to the end of the tape where
the end-sensor will action the tape to rewind to the start of the tape and finally eject.
CAUSE
Electrical noise on the matrix of the operation PWB will cause the unit to set into play
mode.  This is most likely when the digitron displays 1:16:11 pr1.
ACTION
1) Main PWB DUNTK5533**** with shuttle.
Add 120pF surface mount capacitor to the main PWB at the locations C810 and
C812.
2) Main PWB DUNTK5722**** with shuttle.
Add capacitor (VCKYD41HB101K 100pF) to two positions, as follows: -
a)  Between RJ107 to GND (Ground).
b)  AO connector pin 4 to JP237 (GND).
3) Main PWB DUNTK5722**** without shuttle.
Delete jumper wires RJ108 and RJ109 (VRS-CY1JF000J) on main PWB located by
SW810.
Please update your Service Manual with the parts listed below.
REF NO
DESCRIPTION
PART NUMBER
PRICE CODE
120pF Capacitor
VCCCCY1HH121J
AA
C810 & C812
100pF Capacitor
VCKYD41HB101K
AA
Display

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Here you can view online or download Sharp VC-M311HM (serv.man10) Technical Bulletin in pdf. This Technical Bulletin can help you recover, restore, fix, disassemble and repair Sharp VC-M311HM (serv.man10) VCR. Information contained in Sharp VC-M311HM (serv.man10) 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).