User's Manual

5-47
Figure 5-21 UD-51( ) Power Amplifier Removal and Replacement
DC MON
GND
10.5V DC
PWR ALM
TEMP ALM
DC MON ADJ
PWR ALM ADJ
POWER AMPLIFIER
RF
IN
RF
MON
LMW-7099-SM
04/29/03
FRONT PANEL
INSTALL:
(INSTALL STEPS
ARE PREFIXED BY
LETTER 'I').
I1. INSTALL REPLACE-
MENT PA IN SHELF
AND TIGHTEN
MOUNTING SCREWS
(TORQUE TO 19 IN. LBS).
I2 CONNECT
RF OUT CABLE.
I3. CONNECT
RF IN CABLE
TO XMTR RF OUT
CONNECTOR.
I4. REINSTALL PA FRONT
PANEL AND TIGHTEN
THUMBSCREWS
R2. LOOSEN THUMBSCREWS
AND REMOVE FRONT PANEL
R4. DISCONNECT
RF OUT CABLE.
RF OUT
P/O SHELF
P/O SHELF
REMOVE:
(REMOVE STEPS ARE
PREFIXED BY LETTER 'R').
R3. LOOSEN
MOUNTING
SCREWS AND
SLIDE PA TO-
WARD FRONT OF
CARD CAGE TO
ACCESS RF OUT
CONNECTOR
R5. TILT TOP OF PA
FORWARD APPROX 45
TO CLEAR RF OUT
CONNECTOR.
R6. REMOVE PA FROM
CARD CAGE.
R1. DISCONNECT
CABLE FROM
XMTR RF OUT
CONNECTOR.