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.