Technical data
7- 28 Agilent 41000 Administration Guide, Edition 3
Service
Replacement Procedure
To Replace Contact Pins
Agilent B2220A probe card interface fixes the contact pins on its contact assemblies by
using rings. To replace the defective pins, perform the following procedure. You will need
a mini-screwdriver and a slip-joint pliers. Also use rubber gloves if possible to prevent the
contact pin from dirty.
NOTE Contact Pins
The contact pin consists of the narrow part (pin) and the thick part (tube), and the pin can
be inserted into the tube. A spring in the tube works to keep pushing the pin out.
1. Hold the ring that fixes the defective pin. Then use a mini-screwdriver.
2. Clip the thick part of the defective pin, and remove it from the ring. Then use a
slip-joint pliers.
3. Clip the thick part of the new pin by using the slip-joint pliers.
4. Embed the new pin in the ring. Then do not insert the pin more than necessary. The
thick part must not be fully inserted into the ring.
Clean the contact pins if necessary.
Figure 7-18 Removing Contact Pins
NOTE To Clean Contact Pins
To clean contact pins and probe card contacts, prepare the isopropyl alcohol and a dryer.
Then clean them as shown below.
1. Spray the isopropyl alcohol to pins or contacts.
2. Dry them enough and carefully using the dryer.
Do not wipe with a cloth. It may expand dirty area.
5LQJIL[LQJFRQWDFWSLQ
&RQWDFWSLQ