Board Adjustment; Pa Board Adjustment (Fs-1575, -2575, And -5075) - Furuno FS-1575 Service Manual

5.7 Board Adjustment

5.7.1 PA Board Adjustment (FS-1575, -2575, and -5075)

Type of
Model
PA Board
FS-5075 05P0867A
FS-2575 05P0867B
FS-1575 05P0868
PA2
PA1
DRV
FS-5075 PA Board Arrangement
CONFIDENTIAL (internal use only)
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It is strictly prohibited to reproduce the document in whole or in part without prior written permission of FURUNO.
Table 5.7.1 List of Adjustment Points on PA Board
Adjustment
VR
R41 PA IC indicator adjustment
R51 PA bias adjustment
R47 PA Vc indicator adjustment
Ditto Same as above
R79 PA(Q4-Q5) bias adjustment
PRE-DRIV (Q1) bias
R80
adjustment
R81 DRIV (Q3-Q4) bias adjustment
R82 PA IC indicator adjustment
R85 PA Vc indicator adjustment
DRV
PA
FS-2575 PA Board Arrangement
Fig. 5.7.1 PA Board Arrangement
5-33
5.7 Board Adjustment
Function
400 mA at 42V
Same as above
400 mA at 24V
75 mV at R11/87
40 mV at R23
PA
FS-1575 PA Board Arrangement
Adjusted Value