HP laserjet 1018 서비스 매뉴얼

다운로드
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To check the printer high-voltage contacts 
The printer has three spring-loaded pins (callout 1) that make contact with the high-voltage points on
the print cartridge. Verify that the pins are not dirty or corroded and that the spring-loading action is
functional. If the pins are dirty or obstructed, clean them. If they are damaged, replace the printer.
Figure 6-5
  Printer high-voltage contacts
ENWW
Functional checks
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