VC-M25HM (serv.man19). Noisy picture after replaing the EEPROM — Sharp VCR Technical Bulletin (repair manual)

Model
VC-M25HM (serv.man19)
Pages
1 Few pages! See other manuals at the bottom of the first or last page.
Size
10.16 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
VCR / Noisy picture after replaing the EEPROM
File
vc-m25hm-sm19.pdf
Date

View Sharp VC-M25HM (serv.man19) Technical Bulletin online

Sharp Electronics (UK) Limited    CE Technical Support Group
Originator  
$Y:
$Y:
    Supervisor   
   
     Approval Date       /    /        Reference   TB-T9705020 
White - Carry out as required      Yellow - Carry out as required and whenever unit comes in for service      Red - Carry out on all units
VCR970802
Month of Issue :
August 1997
Classification : 
White
VIDEO TECHNICAL BULLETIN
Page 1 of 1
MODELS
  VCM20HM
  VCM21HM
  VCM23HM
  VCM24HM
  VCM25HM
  VCHM60HM
  VCMH64HM
  VCM201HM
  VCM202HM
SYMPTOM After replacing the EEPROM, a noisy playback picture may be experienced.
CAUSE
Corruption of data within the EEPROM.
ACTION
After setting the JP numbers and closing the test mode, turn off the mains
supply to the VCR.  Enough time should be allowed for the the back-up capacitor
to discharge.
When the VCR is powered up again, the microprocessor will read the newly stored
hexadecimal codes from the EEPROM and the unit will perform correctly.
Sharp Electronics (UK) Limited    CE Technical Support Group
Originator  
$Y:
$Y:
    Supervisor   
   
     Approval Date       /    /        Reference   TB-T9705020 
White - Carry out as required      Yellow - Carry out as required and whenever unit comes in for service      Red - Carry out on all units
VCR970802
Month of Issue :
August 1997
Classification : 
White
VIDEO TECHNICAL BULLETIN
Page 1 of 1
MODELS
  VCM20HM
  VCM21HM
  VCM23HM
  VCM24HM
  VCM25HM
  VCHM60HM
  VCMH64HM
  VCM201HM
  VCM202HM
SYMPTOM After replacing the EEPROM, a noisy playback picture may be experienced.
CAUSE
Corruption of data within the EEPROM.
ACTION
After setting the JP numbers and closing the test mode, turn off the mains
supply to the VCR.  Enough time should be allowed for the the back-up capacitor
to discharge.
When the VCR is powered up again, the microprocessor will read the newly stored
hexadecimal codes from the EEPROM and the unit will perform correctly.
Sharp Electronics (UK) Limited    CE Technical Support Group
Originator  
$Y:
$Y:
    Supervisor   
   
     Approval Date       /    /        Reference   TB-T9705020 
White - Carry out as required      Yellow - Carry out as required and whenever unit comes in for service      Red - Carry out on all units
VCR970802
Month of Issue :
August 1997
Classification : 
White
VIDEO TECHNICAL BULLETIN
Page 1 of 1
MODELS
  VCM20HM
  VCM21HM
  VCM23HM
  VCM24HM
  VCM25HM
  VCHM60HM
  VCMH64HM
  VCM201HM
  VCM202HM
SYMPTOM After replacing the EEPROM, a noisy playback picture may be experienced.
CAUSE
Corruption of data within the EEPROM.
ACTION
After setting the JP numbers and closing the test mode, turn off the mains
supply to the VCR.  Enough time should be allowed for the the back-up capacitor
to discharge.
When the VCR is powered up again, the microprocessor will read the newly stored
hexadecimal codes from the EEPROM and the unit will perform correctly.
Sharp Electronics (UK) Limited    CE Technical Support Group
Originator  
$Y:
$Y:
    Supervisor   
   
     Approval Date       /    /        Reference   TB-T9705020 
White - Carry out as required      Yellow - Carry out as required and whenever unit comes in for service      Red - Carry out on all units
VCR970802
Month of Issue :
August 1997
Classification : 
White
VIDEO TECHNICAL BULLETIN
Page 1 of 1
MODELS
  VCM20HM
  VCM21HM
  VCM23HM
  VCM24HM
  VCM25HM
  VCHM60HM
  VCMH64HM
  VCM201HM
  VCM202HM
SYMPTOM After replacing the EEPROM, a noisy playback picture may be experienced.
CAUSE
Corruption of data within the EEPROM.
ACTION
After setting the JP numbers and closing the test mode, turn off the mains
supply to the VCR.  Enough time should be allowed for the the back-up capacitor
to discharge.
When the VCR is powered up again, the microprocessor will read the newly stored
hexadecimal codes from the EEPROM and the unit will perform correctly.
Sharp Electronics (UK) Limited    CE Technical Support Group
Originator  
$Y:
$Y:
    Supervisor   
   
     Approval Date       /    /        Reference   TB-T9705020 
White - Carry out as required      Yellow - Carry out as required and whenever unit comes in for service      Red - Carry out on all units
VCR970802
Month of Issue :
August 1997
Classification : 
White
VIDEO TECHNICAL BULLETIN
Page 1 of 1
MODELS
  VCM20HM
  VCM21HM
  VCM23HM
  VCM24HM
  VCM25HM
  VCHM60HM
  VCMH64HM
  VCM201HM
  VCM202HM
SYMPTOM After replacing the EEPROM, a noisy playback picture may be experienced.
CAUSE
Corruption of data within the EEPROM.
ACTION
After setting the JP numbers and closing the test mode, turn off the mains
supply to the VCR.  Enough time should be allowed for the the back-up capacitor
to discharge.
When the VCR is powered up again, the microprocessor will read the newly stored
hexadecimal codes from the EEPROM and the unit will perform correctly.

Download Sharp VC-M25HM (serv.man19) Technical Bulletin

Here you can view online or download Sharp VC-M25HM (serv.man19) Technical Bulletin in pdf. This Technical Bulletin can help you recover, restore, fix, disassemble and repair Sharp VC-M25HM (serv.man19) VCR. Information contained in Sharp VC-M25HM (serv.man19) 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).