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VCR991001 VIDEO TECHNICAL BULLETIN
Month of Issue: October 1999 Classification: White Page 1 of 1

MODELS

VCM301HM VCM331HM VCMH730HM

VCM311HM VCMH711HM VCMH731HM

VCM311AHM VCM721HM

VCM321HM VCMH73HM

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 C810 C812 DESCRIPTION Capacitor, 120pf SMD Capacitor, 120pf SMD PART NUMBER VCCCCY1HH121J VCCCCY1HH121J PRICE CODE AA 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)

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