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CAUTION
Be careful when folding back the A9 module not to pullout any
wires which lead to the controls. Also be careful not to damage
the Liquid Crystal Display (LCD) units, or the Fault Indicator
Light Emitting Diode (LED).
19 .. Disconnect three pin connector WIPI from A918 on the A9 module. Refer to Figure 5-3.
20. Working from the top of the A9 module, unsolder the two le'ads on the A9 module which.
are connected to the front panel PHONES jack.
.
21. Unsolder the leads on the A9 module which are connected to the IF Gain Control and to
the AF Gain Control.
5.7.20
A9 Module Installation
5.7.21
'.~
Installation of the A9 module is the reverse of removal with the following notes:
1. Connect leads from front panel controls as shown in diagram in step 19 of A9 module
removal .
.,
Ensure ribbon leads from keypads are fIrmly seated in connectors A912 and A913 before
installing holddoWn screWS and hardware.
3. Tighten tuning shaft assembly retaining nut only finger tight.
CAUTION
. '
- - - .
EnsUre' that the .n.ylon
washeri~·
in place 'betweeri the A9module .'
and the tuning shaft assembly retammg nut; Absence
ciftllis -
washer (insulator) may cause electrical damage to the A9 module.
CAUTION
Do not overtighten the tuning shaft assembly. Use fmger pressure
only. Overtightening may cause damage to A9 module, and will
cause abnormal tightness of the manual tuning shaft.
AlO Module Removal
1.
Perform the Preliminary Procedure as directed
in
Paragraph 5.7.1.
2. Remove the receiver top cover as directed in Paragraph $.7.2.
3. Loosen (counterclockwise) the four (4) Y4 tum fasteners on the AlO module cover.
4. Lift out the AlO module cover.
5. Remove the Bandwidth Filter cover as directed in Paragraph 5.7.25.1.
6. Disengage the locking clips (2 each) on connectors Al 012 and AlOJ3 located on the
outside of the AIO module.
7. Carefully unplug the connectors from Al 012 and AlOJ3.
5-28
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