Agilent Technologies 54502A Manuale di Servizio Scaricare il pdf (Pagina 106)

Removal and

Replacement of

CRT Monitor

Assembly

1. Disconnect pod cables from rear of instrument.

2. Disconnect power cable.

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

4. Connect a jumper lead between ground lug of CRT and shaft of a

screwdriver. To discharge CRT, place screwdriver under protestive rubber

cap of post accelerator lead and momentarily touch screwdriver to metal clip

of post accelerator lead.

Caution Discharge the post accelerator lead to a grounding lug only. Components will be

damaged if the post accelerator is discharged to other areas.

Note The CRT may charge by itself even while disconnected. Discharge the CRT

before handling by shorting the post accelerator terminal of the CRT to the ground

lug with a jumper lead.

5. Disconnect post accelerator lead from CRT by firmly squeezing rubber cap

until metal clip disengages from CRT.

6. Detach intensity cable from sweep board.

7. Disconnect sweep cable assembly from sweep board and CRT cables from

from CRT and Sweep board.

8. Slide sweep board up and out of cabinet slot.

Note When installing sweep board, it may be necessary to press on center of outer shield

of sweep board to allow the board to clear cabinet support rib.

9. Carefully place instrument in front-panel-down position.

10. To remove CRT, remove the four locknuts securing the CRT to front panel.

Remove CRT and ground bracket from front panel of instrument.

Note When installing CRT, make certain that CRT yoke is properly aligned. THE

GROUND BRACKET MUST BE INSTALLED BEFORE THE CRT.

11. To install CRT Monitor Assembly, reverse this procedure.

Note After replacement of CRT Monitor Assembly, perform the CRT adjustment

procedures in section 4 of this manual.

HP 1650B/1651B Service

Service Manual 6-19

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Agilent Technologies 54502A Manuale di Servizio Pagina 106