Keysight Technologies InfiniiMax III Series, User Manual

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2. InfiniiMax III Probe Heads
N2836A InfiniiMax III Solder-in Probe Head
Replacing Axial Resistors
on the N2836A Solder-in
Probe Head or N2838A
ZIF Tips
The 130 ohm axial resistors at the tip of the N2836A solder-in probe head
or the N2838A ZIF tip can be replaced when they are worn out or
damaged.
The replacement axial resistor kit for the N2836A and N2838A is
N2836-68701. Each resistor kit contains 10 resistors.
The recommended equipment and procedure for replacing the resistors is
outlined below.
Recommended Equipment
• Vise or clamp for holding tip.
• Metcal STTC-022 (600 °C) or STTC-122(700 °C) tip soldering iron or
equivalent. The 600 °C tip will help limit burning of the FR4 tip PC
board.
• 0.381 mm (0.015 in) diameter RMA flux standard tin/lead solder wire.
• Fine stainless steel tweezers.
• Rosin flux pencil, RMA type (Kester #186 or equivalent).
• Diagonal cutters.
• Magnifier or low power microscope.
• Ruler.
W A R N I N G Only experienced soldering technicians should attempt this repair, as it is very
easy to permanently damage the probe heads and tips.
Replacement Procedure
NOTE The pictures in the following procedure show the N2836A solder-in probe head, but
the same procedure applies to the N2838A ZIF tip.
1
Use the vise or clamp to position the tip an inch or so off the work
surface for easy access.
If using a vise, grip the tip on the sides with light force.
If using a tweezers clamp, grip the tip either on the sides or top and
bottom.
See Figure 31 .
C A U T I O N When tightening the vise, use light force to avoid damaging the solder-in probe
head.