ACCESS PROCEDURES
Removing the A2 Coarse Loop PCA 5-6.
WARNING
THE SYNTHESIZER MODULE, WHICH MUST BE RAISED TO GAIN
ACCESS TO THE A2 COARSE LOOP PCA, IS HEAVY. WHEN RAISING OR
LOWERING THE MODULE, OBSERVE THE PROCEDURE DESCRIBED
UNDER THE HEADING "INTRODUCTION AND SAFETY" EARLIER IN
SECTION 5.
1. Disconnect RF cables W6, W7, and W15 from the connectors at the rear of the
synthesizer module, and remove the nuts and lockwashers from the connectors.
2. Raise the synthesizer module.
3. Remove the #6 screws holding the bottom synthesizer module cover, and remove
the cover.
4. Remove the plug-in capacitor C1 and resistor R1 which are between the A22 Delay
Cable assembly and the A2 Coarse Loop PCA.
NOTE
When reinstalling Cl, be certain to put it between J1 on the A22 Delay
Cable assembly and J9 on the A2 Coarse Loop. J2 on A22 and J10 on the
A2 PCA are not used.
5. Remove the #6 screws holding the heatsinks on U305 and U310, and remove the
heatsinks.
6. Remove the #6 screws holding the PCA.
7. Carefully remove the A2 Coarse Loop PCA.
Removing the A3 Sub-Synthesizer VCO PCA 5-7.
WARNING
THE SYNTHESIZER MODULE, WHICH MUST BE RAISED TO GAIN
ACCESS TO THE A3 SUB-SYNTHESIZER VCO PCA, IS HEAVY. WHEN
RAISING OR LOWERING THE MODULE, OBSERVE THE PROCEDURE
DESCRIBED UNDER THE HEADING "INTRODUCTION AND SAFETY"
EARLIER IN SECTION 5.
1. Disconnect RF cable W13 from the connector at the front of the synthesizer
module, and remove the nut and lockwasher from the connector.
2. Raise the synthesizer module.
3. Remove the #6 screws holding the bottom synthesizer module cover, and remove
the cover.
4. Remove the #6 screws holding the PCA.
5. Carefully remove the A3 Sub-Synthesizer VCO PCA.
5-4
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