Furuno CH-270 Service Manual page 30

TP4
(GND)
TP5
(Audio)
R103
(AUD VOL)
SPEAKER
J7
WIDE/NARROW
TRX Board
(06P0241)
Figure 4.6 Transceiver Unit (CH-273)
Q15 Q13 Q12
J1
TP8 (
TR1)
CR15 (
TP6 (
TR2)
Figure 4.7 TRX Board (06P0241)
CPU Board
(06P0258)
PRA Board (06P0259)
Q10 Q9 Q7
GND
J6
R70 (
TR)
TP9 (
TP3 (
SIG OUT)
27
PWR Board
(06P0242)
Q6 Q4
TP2 (IF)
J3
Min Gain)
R38 (
AGC)
CR1
(VTX)
J4
TP10 (
VG)
R57
Max Gain
)
GAIN