
5. Assembly Replacement
Introduction ..
..
............... .. .. .. .. .. ....5-1
Assembly and P
art Locations .............
..
..
...... .. 5-7
Major Assembly and Cable Locations ............... .. .. . 5-7
Service Position ..
...............
..
..
..
..
..
...5-7
T
ools . .. ...............
..
..
..
..
.........5-7
Special T
echniques ................. .. .. .........5-9
Safety ................... .. .. ............5-9
F
asteners (Screws and Nuts) ...............
..
..
.....5-9
Cable and Connector Identication .................. .. .5-9
Semi-Rigid Coaxial Cables ................... .. ....5-10
Flexible Coaxial Cables .............
..
..
..........5-11
SMC Connectors ................ .. .. .........5-11
SMA Connectors ..............
..
..
..
.........5-11
SMB Connectors ................ .. .. .........5-11
Multi-wire Cables ................ .. .. .........5-11
Synthesizer Covers ..............
..
..
..
..........5-13
T
oRemove the T
op Cover .......
..
................5-13
T
oRemove the Bottom Cover ........................5-15
P
ower Supply (A11) .............................5-17
T
oDisconnect the P
ower Supply Cables .........
..
..
......5-17
T
oRemove the P
ower Supply ..........
..
..
..
........5-18
Reassembly Tips .........
..
...................5-19
Fuse ............ .......................
. 5-20
T
oRemove (and Replace) the Fuse ....
..
...............5-20
F
an Assembly ..........
......................5-21
T
oDisconnect the F
an Cable ........................5-21
T
oRemove the Fan .........................
...5-22
Reassembly Tips .............................. 5-23
Divider and Modulation Board Assembly (A4) . ................5-23
T
oA
ccess the Service P
osition . ...................... 5-23
T
oRemove the Assembly ..
..
...................... 5-23
Reassembly Tips .......
....................... 5-24
Microprocessor Board Assembly (A3) ..................... 5-26
T
oA
ccess the Service P
osition .................. .. ...5-26
T
o Disconnect the Cables ...................
.......5-26
T
o Remove the Microprocessor Assembly .................. 5-27
Reassembly Tips . ..................... .. .. .. ..5-27
Battery (A3BT1) ............
..
..
..
..
..
..
.......5-29
T
oA
ccess the Service P
osition .......................5-29
To Remove the P
art ....
........................ 5-29
To Reassemble the Instrument .... .. .. .. .. .. .. .. .. .. . 5-30
Crystal Oscillator (Option 1E5) ............ .. .. .. .. .. .. 5-31
To Disconnect the Oscillator Cables .... .. ............... 5-31
To Remove the Oscillator . . . . . . . . . . . . . . . . . ......... 5-31
Reassembly Tips . . . . . . . . . . . . . . . . . . . . . ......... 5-32
ALC Board Assembly (A10) . . . . . . . . . . . . . . . . . . . . ...... 5-33
To Remove the Assembly . . . . . . . . . . . . . . . . . . . . ...... 5-33
Reassembly Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-33
YIG Driver Board Assembly (A9) .. .. .. .. .. .. .. .. .. .. .. . 5-35
ToAccess the Service Position .... .. .. .. .. .. .. .. .. .. . 5-35
To Remove the Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 5-36
YO (YIG Oscillator) Loop/Oset Synthesizer Board Assembly (A7) . . . . . . . . 5-38
To Remove the Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 5-38
Reassembly Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-38
Contents-3