176 Chapter4
Assembly Replacement
Introduction
Introduction
This chapter describes the removal and replacement of all major
assemblies. The following replacement procedures are provided:
Page
Access to Internal Assemblies.............................................................
page 177
Cable Color Code..................................................................................page 178
Required Tools......................................................................................page 178
Procedure 1. Spectrum Analyzer Cover................................................page 179
Procedure 2. A1 Front Frame/A18 LCD ................................................page180
Procedure 3. A1A1 Keyboard/Front Panel Keys....................................page 200
Procedure 4. A1A2 RPG.........................................................................page 201
Procedure 5. A2, A3, A4, and A5 Assemblies........................................page 176
Procedure 6. A6PowerSupplyAssembly ............................................... page 209
Procedure 7. A7 through A13 Assemblies .............................................page 220
A7 LO Multiplier/Ampli er (LOMA).................................................page 222
A8 Low Band Mixer...........................................................................page 223
A9 Input Attenuator............................................................................page 224
A10/A12 (RYTHM/SBTX)................................................................page 227
A11 YTO............................................................................................page 228
A13 Second Converter.......................................................................page 230
Procedure 8. A14 and A15 Assemblies .................................................page 231
Procedure 9. B1 Fan ..............................................................................page 237
Procedure 10. BT1 Battery.....................................................................page 238
Procedure 11. Rear Frame/Rear Dress Panel.........................................page 239
Procedure12. EEROM...........................................................................page 254
Procedure 13. A21 OCXO......................................................................page 256
Tools required to perform the procedures are listed in Table 4-1 on
page 178.
The words right and left are used throughout the replacement
procedures to indicate the side of the spectrum analyzer as viewed from
the front panel. See Figure 4-1 on page 179.
Numbers in parentheses are used throughout the replacement
procedures to indicate numerical callouts on the figures.
CAUTION The spectrum analyzer contains static-sensitive components. Read the
section entitled, “Electrostatic Discharge” in Chapter 1 .
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