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Remove/Replace NPD Active Element Power Control
HAZARDOUS VOLTAGES ARE PRESENT IN THE INSTRUMENT WHEN THE POWER
CORD IS CONNECTED. AVOID A POTENTIALLY DANGEROUS SHOCK HAZARD BY
DISCONNECTING THE POWER CORD BEFORE WORKING ON THE INSTRUMENT.
1. Set the main power line switch to the off position.
2. Disconnect the power cable from its receptacle.
3. Remove the electronics carrier top cover by
grasping it at the rear and lifting upwards until
its catch releases, then pulling it towards the
rear of the instrument.
4. Remove the right side panel by removing four
screws: two each along its upper and lower
edges.
When disconnecting a plug, pull on the plug not on its wires. pulling on the wires
`
may cause breakage.
The following steps require protection against ESD (Electro- Static Discharge).
`
Use a grounded wrist strap (part no. 9300- 0969 - large, or 9300- 0970 - small)
connected to a suitable ground. Failure to heed this caution may result in
damage to the instrument.
5. Disconnect the NPD bead power cable from the
detector PCB by pulling it straight off.
6. Use the side edge of an AMP pin extraction/
lance tool (8710- 1542) to remove the interlock-
ing side covers from the plug. (The plug is
made up of two connectors; one is for the to-
EXTRACTION
roid bead power, the other is for the active con-
LANCE RESET
trol element.)
TOOL
LANCE
RESET TIP
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ELECTRONICS
CARRIER TOP
COVER
TOOL
STOP
LANCE
RELEASE
TIP
DASH NUMBER
MARKED HERE
SVC 4- 38
RED O VISIBLE
OFF
SCREWS
RIGHT SIDE
PANEL
SCREWS
TO NPD TRANSFORMER
TOP PART OF CONNECTOR
LOCKING TAB
5
1
LOCKING TAB
NOTE
5
ASSEMBLED
CONNECTORS
1
ON
TO NPD BEAD
POWER
CONTROL
BOTTOM PART
OF
CONNECTOR
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