Agilent Technologies 54502A Manuale di Servizio Scaricare il pdf (Pagina 108)

10. Align new fan on back panel with fan cable adjacent to line filter assembly

and label toward rear (fan rotor is facing forward).

11. Align fan guard on back of panel.

12. Attach fan to rear panel with four machine screws.

13. Re-assemble instrument in reverse order of above.

14. Install top cover. Secure top cover to chassis using ten screws.

Note To ensure top cover is properly installed, secure side screws of top cover before

securing top screws.

Removal and

Replacement of

Keyboard

Assembly

1. Disconnect pod cables from rear of instrument.

2. Disconnect power cable.

3. Remove ten screws securing top cover. Remove top cover.

4. Disconnect disk drive cable from disk drive.

5. Remove two screws securing disk drive to power supply. Remove disk drive

by sliding assembly out front panel of instrument.

6. Remove two retaining pins securing power supply to chassis. Slide power

supply out far enough to gain unobstructed access to power supply cables.

7. Disconnect power supply line input and DC output cables. Remove power

supply.

8. Disconnect keyboard cable from system board.

9. Remove four screws securing keyboard assembly to chassis (located on

inside of instrument).

10. Remove keyboard assembly.

11. Disconnect RPG cable from keyboard circuit board assembly. Keyboard

assembly can now be disassembled.

12. Reinstall keyboard assembly by reversing this procedure.

13. Install top cover. Secure top cover to chassis using ten screws.

Note To ensure top cover is properly installed, secure side screws of top cover before

securing top screws.

HP 1650B/1651B Service

Service Manual 6-21

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Agilent Technologies 54502A Manuale di Servizio Pagina 108