M/A-Com 19D902797G10, Maintenance Manual

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PRODUCTION CHANGES
6.0 PRODUCTION CHANGES
Changes in the equipment to improve performance 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 the descriptions of parts affected by these revisions.
REV. A - POWER AMPLIFIER 19D902797G3
REV. A - POWER AMPLIFIER BOARD 19D902794G3
To make unit ETS compliant.
Changed capacitors C17, C44 & C45. Capacitors C17, C44 & C45 were 19A702052P33.
Changed capacitor C50. Capacitor C50 was 0.068 µF (19A702052P24).
Changed capacitor C61. Capacitor C61 was 8.2 pF (19A702061P12).
Changed capacitor C62. Capacitor C62 was 27 pF (19A702061P33).
Changed capacitor C84. Capacitor C84 was 1000 pF (19A705108P40).
Changed diodes D1, D2 & D3. Diodes D1, D2 & D3 were (19A700047P3)
Changed inductors L15 thru L17. Inductors L15 thru L17 were (19A700024P37).
Changed inductor L24. Inductor L24 was 15nH (19A705470P3).
Changed resistor R33. Resistor R33 was 5.6K (19B800607P562).
Changed resistor R34. Resistor R34 was 3.9 ohms composition (19A700113P5).
Changed transistor Q7. Transistor Q7 was 19A701940P1.
Deleted inductors L26 and L27.
Deleted capacitors C48, C49, C63 & C74.
Added capacitors C1, C25 & C26.
Added resistors R37, R51 & R52
Added RT1.
Added VR2.
REV. B - POWER AMPLIFIER 19D902797G3
REV. B - POWER AMPLIFIER BOARD 19D902794G3
To update PWB for new split.
Changed PWB.
Changed capacitor C26. Capacitor C26 was 100 pF (344A3126P38).
Changed capacitor C81. Capacitor C81 was 100 pF (344A3126P38).
Added capacitors C27 thru C29 and C34 and C35.
Changed resistor R36. Resistor R36 was 150 ohms (19B801486P151).
Changed resistors R44 thru R46. Resistors R44 thru R46 were 150 ohm
(19B801486P151).
Changed resistorsR47 and R48. Resistors R47 and R48 were 39 ohm
(19B801486P390).
Added resistors R32 and R35.
REV. C - POWER AMPLIFIER 19D902797G3
REV. C - POWER AMPLIFIER BOARD 19D902794G3
To update PWB for new band splits.
REV. D - POWER AMPLIFIER 19D902797G3
REV. D - POWER AMPLIFIER BOARD 19D902794G3
To update PWB for new band splits and add power monitor circuitry.
Added dual operational amplifier U2.
Added capacitor C48.
Added resistors R54, R53, R55.
REV. A - POWER AMPLIFIER 19D902797G6
To update PWB to new band splits.
LBI-38674L 23