Repair And Troubleshooting; Inspection; Repair; Printed Circuit Component Replacement - HP 10811A Operating & Service Manual

8-41. REPAIR AND TROUBLESHOOTING

8-42. Inspection

8-43. The 10811A/B should be inspected for indications of mechanical and electrical defects. Electronic
components that show signs of overheating, leakage, frayed insulation, and other signs of
deterioration should be checked and a thorough investigation of the associated circuitry should be
made to verify proper operation. Mechanical parts should be inspected for excessive wear,
looseness, misalignment, corrosion, and other signs of deterioration.
Proper static handling techniques must be employed when
servicing semiconductor products. The voltage susceptibility of all
IC and transistor families is well below levels commonly found in
service environments. Exercise care and observe standard static
precautions.

8-44. REPAIR

8-45. Printed Circuit Component Replacement

8-46. To prevent damage to the plating and the replacement component, apply heat sparingly, and
work carefully. See CAUTION below.

8-47. Replacing Integrated Circuits

8-48. Following are two recommended methods of replacing integrated circuits:
a. SOLDER GOBBLER. This is the best method. Solder is removed from board by a soldering
iron with a hollow tip connected to a vacuum source.
b. CLIP-OUT. Clip the leads as close to the component as possible. With a soldering iron and
long nose pliers, carefully remove the leads from each hole. Then clean the holes.
The flex circuitry used in the 10811A/B oscillator requires special
attention to soldering iron tip temperature and the length of time heat is
applied. A low wattage (≈25W) iron with a temperature control should be
used. The tip temperature should be held below 500°C. Care should be
taken to be sure that the iron is not held on the circuit longer than
necessary. Components should be removed by clipping the leads and
then gently removing them. Do not use force when removing
components. Following these precautions will insure that repairs can be
easily made without damaging the flex circuit. Also, components should
not be arbitrarily removed for troubleshooting or replacement unless
there is reasonable confidence in the component's failure.
CAUTION
CAUTION
Model 10811A/B
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