Text preview for : VCM311HM-BULL5.pdf part of Sharp VC-M311AHM MODELS
VC-M301HM
VC-M301LM
VC-M311HM
VC-M311LM
VC-M311AHM
VC-M321HM(GY)
VIDEO CASSETTE RECORDER
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VIDEO TECHNICAL BULLETIN
MODELS VCM311HM VCMH722HM VCM27HM VCMH68HM VCM312HM VCMH73HM VCM271HM VCMH69HM
Month of Issue: Classification:
VCR2000 06 01
June 2000 White Page 1 of 1
VCM522HM VCMH731HM VCMH67HM
VCMH721HM VCM26HM VCMH675HM
SYMPTOM Various faults:
· · · · · · ·
No operation Will not come out of standby EEPROM can not be programmed correctly Erratic or intermittent functions Will not respond to the remote control Will not respond to the front panel buttons Erratic or intermittent timer programming operations
CAUSE
Microprocessor program crash. All of the models listed above utilise a back-up power facility that maintains the memory inside the main processor in case of a mains power failure. If the mains failure is of reasonable short duration, then all original settings are retained and the unit will continue to function as before the mains interruption (including the retention of any corrupted data).
ACTION
Discharge back-up capacitor connected to the supply pins of the processor.
Sharp Electronics (UK) Limited
Reference AVW04062000-2 Revision
White Carry out as required Yellow Carry out as required and whenever the unit comes in for service Red Carry out on all units