Drv Board: 05P0866B (Fs-2575) - Furuno FS-1575 Service Manual

8. DRV board: 05P0866B (FS-2575)

J3: RF OUT
CONFIDENTIAL (internal use only)
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Q4, 5 (SD1407)
R79: PA BIAS ADJ.
(24Vcc -> 500mA)
Fig. 2.5.15 DRV board (05P0866B) A-side
Fig. 2.5.16 DRV board (05P0866B) B-side
2-33
Q2, 3 (RD16HHF1) Q1 (RD16HHF1)
TP2-3: Q2, 3
BIAS Check (100mV)
05P0866A:
R85, 80 not mounted, R39=10k, R4=18
05P0866B:
J4, T5, R50, 52, 53 not mounted
R39=6.8k, R4=47
2.5 Board
J2: RF IN
R77:Q1
BIAS ADJ.
R78: Q2, 3
BIAS ADJ.
TP1-2: Q1
BIAS Check (75mV)