Zeiss humphrey HFA II-i series, Field Service Manual

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Humphrey Field Analyzer II - i Parts Removal/Replacement
Confidential and Proprietary
52235C1105 3 - 11
Field Service Guide
3.2 Front Cover Assembly Removal
NOTE - As described below, the front cover assembly must first be partially removed to allow
an internal cable and ground wire to be disconnected (step 3) before the cover can be removed
completely.
1) Loosen the two captive 1/4-turn fasteners located along the bottom front of the front
cover assembly.
2) Pull the bottom of the front cover assembly out slightly; then gradually lift up on the
front cover assembly while pulling out from the top. This will free the front cover
assembly from the rest of the instrument.
3) While holding onto the front cover assembly, disconnect the ribbon cable from the
Patient Support Interconnect PCB and disconnect the ground wire from the chassis.
4) Remove the front cover assembly from the instrument.
Replacement Notes:
P
Do not over tighten the 1/4-turn fasteners.
P
Be sure to reconnect the ground wire to the chassis and the ribbon cable to the
Patient Support Interconnect PCB before attaching the front cover assembly. Guide
the cover on carefully to avoid pinching the ground wire or the forehead rest drive
belt between cover and chassis.
Follow-up Checks/Adjustments:
See Table 3-1.