Service manual

REVISION SUMMARY
C-4
April 2001
Part No. 001-9800-203
430-470 MHz 40W PA Board Changes
The following changes have been made to this
board. A new revised schematic is included.
Added a stabilization module, Part No.
023-9800-531, across the base-collector of Q600.
This module contains the following components:
C1 0.01 µF X7R ±10% 50V 510-3606-103)
R1 33 ohm ±5% 1W smd 569-0175-330
R2 33 ohm ±5% 1W smd 569-0175-330
Changed:
C617 from 43 to 47 pF (510-0019-470)
C637 from 15 to 18 pF (510-0019-180)
C657 from 7.5 to 15 pF (510-3663-150)
L607 from 9T to 7T (542-0030-007)
R606 from 68k to 100k (569-0105-104)
R607 from 100k to 75k (569-0105-753)
R612 from 51 to 330 (569-0175-331)
Added across L601:
R614, 330 ohm (569-0175-331)
R615, 330 ohm (569-0175-331)
R616, 330 ohm (569-0175-331)
470-512 MHz 40W PA Board Changes
The following changes have been made to this
board.
Changed C615 from 56 to 47 pF (510-0019-470)
Added across C644, C658, 4.7 pF (510-3601-479)
800/900 RF Board Changes
The following changes have been made to this
board.
On the schematic, the part number under “Q508”
(left center) was incorrect. Changed “1300” to
“3612”.
With 800 MHz versions only, C202 has changed
from 11 to 12 pF (510-3615-120).
900 MHz 15W and 30W PA Board Changes
The following changes have been made to these
boards.
With 30W models, the last three digits of the part
number for Stabilization Board A533 have changed
from -533 to -531.
Added across C603/C604, C640, 2.2 µF
(510-2245-229).
Added RF shield 537-5001-008 on bottom of PC
board near C604/C605.
800 MHz 30W PA Board Changes
The following changes have been made to this
board.
Changed C633 from 12 to 56 pF (510-3653-560)
Changed R601 from 0.015 to 0.030 ohm
(569-2019-307)
Added across base-emitter of Q651, R614, 100 ohm
(569-0175-101)
Added across L602, R615, 330 ohm (569-0175-331)
Audio/Logic Board Changes
The following change is being made to the
receive data circuit of these boards located on pages
9-14 to 9-17 of the -200 manual.
Changed CR301 to separate diodes CR301/CR302
(523-1504-012).
Changed R308 from 100k to 150k (569-0105-154).
Added in series with R308, 10k-ohm thermistor
RT301 (569-3013-007).
APPENDIX B CHANGES
On page A-6 of Appendix A, in Table A-2 the
following functions have been added to the Option 1,
In, Low Tier box: Data ARQ, Data PTT Revert, PTT.