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VCR2000 03 01
Month of Issue: Classification:
VIDEO TECHNICAL BULLETIN
MODELS VCM301HM VCM331HM VCM730HM VCM311HM VCMH711HM VCMH721HM VCM311AHM VCMH721HM
March 2000 White Page 1 of 1
VCM321HM VCMH73HM
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. 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.
ACTION
REF NO C810 & C812
DESCRIPTION 120pF Capacitor 100pF Capacitor
PART NUMBER VCCCCY1HH121J VCKYD41HB101K
PRICE CODE AA AA
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