HP 5305 B, Operating And Service Manual

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Model 5305B
Maintenance
SECTION IX E
5305B 1300 MHz COUNTER
SUBSECTION V
MAINTENANCE
9E-5-1 INTRODUCTION
9E-5-2. This subsection contains maintenance information
for Model 5300/5305B 1300 MHz Counter. Performance
checks, adjustment procedures, and tests to isolate defective
components are included.
9E-5-3. RECOMMENDED TEST EQUIPMENT
9E-5-4. Test equipment recommended for performance
checking and servicing the 5300B/5305B 1300 MHz Counter
is listed in Table 9E-1-1 and in Table 5-1 in the 5300B
portion of the manual. Test equipment with equivalent
characteristics may be substituted for listed equipment.
9E-5-5. IN-CABINET PERFORMANCE CHECK
9E-5-6. Use the performance check in Table 9E-5-1 and
the test card at the back of this subsection to verify proper
operation of all circuits in the counter and all circuits in the
5300 that are used with the counter plug-on. The performance
check may be used:
a. As part of an incoming inspection check of instrument
specifications.
b. Periodically, for instruments used in systems where
maximum reliability is important.
c. As part of a procedure to locate defective circuits.
d. After any repairs of adjustments, before returning
instrument to regular service.
9E-5-7. INSTRUMENT ACCESS
9E-5-8. For access to the plug-on assembly, separate the
5300 from the 5305B as follows:
a. Turn ac power OFF and disconnect power cord.
b. Pull the two side casting latches fully rearward ( it is
necessary to press the latch handles gently away from
the center of the instrument to unlock them).
c. When latches are fully extended rearward, the 5300
and 5305B cast housings should be separated by
about 1/8-inch.
d. Lift the 5300 gently away from the 5305B.
e. Separate 5305B Board Assembly from the cast
housing as follows (refer to Figure 9E-5-1):
(1) Press rear, plastic-nylon retaining clips on each
side of 5305B casting and lift the rear of the
5305B Assembly to release it from the casting.
(2) Press front plastic-nylon retaining clips on each
side of 5305B casting and lift the front of the
Board Assembly to release it from the casting.
(3) Lift Board Assembly from the casting.
f. Mate the 5305B Board Assembly to the 5300 and apply
ac power.
g. To reinstall the Board Assembly into the casting,
reverse procedure of steps d through f.
9E-5-9. PERIODIC MAINTENANCE
9E-5-10. To determine if the 5300B/5305B is operating
properly, perform the In-Cabinet Performance Checks
listed in Table 9E-5-1.
9E-5-11.
MAINTENANCE AND REPAIR
9E-5-12. BOARD REMOVAL. When removing the
printed circuit board for replacement, repair, or servicing,
always remove ac power and separate the board from the
casting according to Paragraph 9E-5-8, steps a to e.
9E-5-13. COMPONENT REPLACEMENT. When re-
placing a circuit board component, use a low heat soldering
iron. Heat may be used sparingly as damage to the circuit
foil may result. Mounting holes may be cleaned out with a
toothpick while heat is applied. Connection should be
cleaned with a cleaning solution after component removal
and replacement.
9E-5-1