Read Sharp DM-1500 (serv.man2) Service Manual online
4. Memory Device
A. Function
The memory device is used to monitor the life of the developer cartridge in the way that the machine reads and writes information (e.g.page count)
to the memory device equipped in the developer cartridge.
When the life is reached, the memory device becomes nonfunctional to prevent the deterioration of image/text quality and machine damages.
Therefore, unnecessary service costs would be saved.
to the memory device equipped in the developer cartridge.
When the life is reached, the memory device becomes nonfunctional to prevent the deterioration of image/text quality and machine damages.
Therefore, unnecessary service costs would be saved.
B. Flowchart
C. Display timing of DM-1500/1505 maintenance lamps, toner lamp and error codes
Remaining print quantity
≥ 8K
Remaining print quantity
< 8K
Remaining print quantity
= 0
Maintenance
lamp
Toner lamp
Error code
Maintenance
lamp
Toner lamp
Error code
Toner lamp
Error code
During
maintenance
period
maintenance
period
Start
OFF
OFF
–
OFF
OFF
–
OFF
–
Toner Near
OFF
ON
–
OFF
ON
–
ON
–
Toner End
OFF
BLINK
–
OFF
BLINK
F2
BLINK
F2
After
maintenance
period
maintenance
period
Start
ON
OFF
–
ON
OFF
–
OFF
–
Toner Near
ON
ON
–
ON
ON
–
ON
–
Toner End
ON
BLINK
–
ON
BLINK
F2
BLINK
F2
Note: When the memory device is faulty, “U2” will be displayed.
Is 8K print reached ?
Is toner empty
detected ?
detected ?
End of life
Copying
Yes
Yes
No
No
Conditions for end of life
(1) Copy/print volume = 8K.
(2) Toner empty is detected.
(1) Copy/print volume = 8K.
(2) Toner empty is detected.
Handshake
New developer cartridge
Installed to the machine
Machine
DM-1505
3 – 3
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