Recommended Test Equipment; Repair; Module Exchange Program; Replacing Yig Oscillator A12 Or Yo Driver A6 - HP 83522A Service Notes

Model 83522A Service
Table
8-4.
Hexadecimal Equivalents
8-26. When the 8350A is in the Hex Data
WRITE mode (refer to paragraph 8-22), several
front panel keyboard pushbuttons function as
hexadecimal digits. Figure 8-4 illustrates the
DATA ENTRY keyboard with the hexadecimal
digits assigned to each pushbutton.
L
Hexidecimal
0
1
2
3
4
5
6
7
8
9
A
b
r
DATA
ENTRY
SHIFT
A b
Figure
8-4.
Hex Entry Keys
1110
11 11
Binary
0000
000 1
0010
001 1
0100
0101
01 10
0111
1000
1001
1010
101 1
8-27. RECOMMENDED TEST EQUIPMENT
Decimal
0
1
2
3
4
5
6
7
8
9
10
11
8-28. Test equipment required to maintain the
Model 83522A is listed in Section I. If the
equipment listed is not available, equipment
that meets the minimum specifications shown
may be substituted.
8-29. REPAIR
8-30. Module Exchange Program
8-3 1. This instrument may be quickly repaired
by replacing a defective module with a restored-
exchange module. To support the module repair
concept, Hewlett-Packard has set up a module
exchange program.
8-32. The procedure for using the module
exchange program is given in Figure 8-5. When
you locate the defective module, order a
replacement module through the nearest
Hewlett-Packard sales office. The restored-
exchange module will be sent immediately
directly from a customer service replacement
parts center. When you receive the exchange
module, return the defective module in the same
special carton in which the exchange module
was received. DO NOT return a defective
module to Hewlett-Packard until you receive the
exchange module.
8-33. If you are not going to return the
defective module to Hewlett-Packard, or if you
are ordering a module for spare parts stock, etc.,
order a new module using the new module part
number listed in Table 6-3.
8-34. The Hewlett-Packard module exchange
program allows you to obtain a fully tested and
guaranteed restored-exchange module at a
reduced price. (The reduced price is contingent
upon return of the defective module to Hewlett-
Packard.) Assemblies available for module
exchange are listed in Table 6-1.
8-35. Replacing YIG Oscillator A1 2 or YO
Driver A6
8-36. Each YIG Oscillator requires a unique
set of six resistors to be installed in YO Driver
A6 for proper YIG coil drive. The value of these
resistors is documented on a label attached to
the side of the 83522A near the RF section. If A6
is replaced, these six resistors (A6R1, A6R3,
A6R38, A6R39, A6R40, and A6R41) must be
removed from the old board and installed on the
new board. Also, if YIG Oscillator A12 is
replaced, the six new resistors shipped with the