Aspect Medical Systems BISPECTRAL INDEX A-2000, Service Manual

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SECTION VII DISASSEMBLING AND REASSEMBLING THE A-2000™
- 7-24 -
7.9
THE FAN
7.9.1
Removing the Fan
WARNING:
DUE TO THE BATTERY OPERATION POSSIBLE WITH NO AC CONNECTED,
EXTREME CARE MUST BE USED WHEN DISASSEMBLING AND
ASSEMBLING THE A-2000 MONITOR. WITH AC DISCONNECTED AND
BATTERY POWER ON, HIGH VOLTAGE IS PRESENT ON THE E/L DISPLAY
AND POWER SUPPLY PCB. DO NOT ACTIVATE POWER ON SWITCH WITH
CASE OPEN!
1. Open the monitor case as described in Section 7.2.1.
2. Remove the Printed Circuit Board Assembly as described in Section 7.5.1.
3. Note wire orientation on installed fan (looking into case, wire exits fan upper left
quarter). (See Figure 7-20).
4. Remove four mounting screws. Retain fan gasket and soft washers.
Note:
Newer versions of the A-2000 have only two mounting screws.
7.9.2
Installing the Fan
1. Position fan over gasket with correct wire exit orientation and airflow is out of case.
(See Figure 7-20).
2. Using Loctite 425, install four mounting screws with soft washers. (Only two screws
are used in newer versions of the A-2000. See Figure 7-21.) Carefully tighten screws
without over-tightening.
Caution:
VERY IMPORTANT! Use only the Loctite number specified. Using
the incorrect Loctite will damage plastic components.
3. Install Interconnect PCB as described in section 7.5.2.
4. Close the monitor case as described in section 7.2.2.
WARNING:
FAN WIRE MUST BE POSITIONED AS SHOWN IN FIG. 7-21.
INCORRECT ROUTING OF FAN WIRE MAY RESULT IN A
HAZAROUS CONDITION.