M/A-Com 19D902797G1, Руководство по обслуживанию

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PARTS LIST & PRODUCTION CHANGES
PRODUCTION CHANGES
Changes in the equipment to improve or to simplify circuits are identified by a
"Revision Letter", which is stamped after the model number of the unit. The
revision stamped on the unit includes all previous revisions. Refer to the Parts
List for descriptions of parts affected by these revisions.
REV. A - POWER AMPLIFIER 19D902797G1
To improve reliability. Replace C131, C132, C135 & C136 with
19A700006P37. Printed circuit board also changed.
REV. B - POWER AMPLIFIER 19D902797G1
To meet ETSI specs for adjacent channel transient power. Changed
R 2 2 4 f r o m 1 0 K o h m s ( 1 9 B 8 0 0 6 0 7 P 1 0 3 ) t o 2 2 K o h m s
(19B800607P223). Added D211 (19A700025P6) between Q201-C
(cathode) and Q201-E (anode).
REV. A - POWER AMPLIFIER MODULE, 19D902797G1
REV. A - POWER AMPLIFIER BOARD 19D902794G1
To improve reliability.
Changed capacitors C131, C132, & C136.
REV. B - POWER AMPLIFIER BOARD 19D902794G1
To meet ETSI specs for adjacent channel transient power.
Changed resistor R224. Resistor R224 was 19B800607P103, 10k
ohms.
Added Zener diode D211 between transistor Q201-C (cathode) and
Q201-E (anode).
REV. B - POWER AMPLIFIER MODULE 19D902797G1
REV. C - POWER AMPLIFIER BOARD 19D902794G1
To replace transistor Q101, no longer manufactured by vendor and to
improve final PA stability.
Added capacitors C118 and C301-C304.
Added ferrite beads L301-L304.
Deleted resistors R104 and R106. Resistors R104 and R106 were
19B800607P331, 330 ohms.
Changed capacitor C114. Capacitor C114 was 19A705108P19, 18pF.
Changed capacitors C132 and C135. Capacitors C132 and C135 were
19A700006P37, 130pF.
Changed capacitor C141. Capacitor C141 was 19A705108P120,
1000pF.
Changed inductor L106. Inductor L106 was 19A701418P1.
Changed inductors L119 and L120. Inductors L119 and L120 were
19A129569P1.
C h a n g e d r e s i s t o r s R 1 0 5 a n d R 2 1 4 . R e s i s t o r R 1 0 5 w a s
19B800607P100, 10 ohms. Resistor 214 was 19B800607P103, 10k
ohms.
Moved diodes D203, D205, D206, D209 and D210.
Moved connectors J101, J103 and J201.
Changed Printed Wire Board (PWB) from 19D902793P1R5 to
19D902793P1R6.
LBI-38531G
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