Read Sharp VC-M27HM (serv.man23) Technical Bulletin online
VCR2000 06 01
Month of Issue:
June 2000
Classification:
White
VIDEO TECHNICAL BULLETIN
Page 1 of 1
Sharp Electronics (UK) Limited
Reference AVW04062000-2
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
VCM311HM
VCM312HM
VCM522HM
VCMH721HM
VCMH722HM
VCMH73HM
VCMH731HM
VCM26HM
VCM27HM
VCM271HM
VCMH67HM
VCMH675HM
VCMH68HM
VCMH69HM
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.
