Kenwood TM-281A Service Manual page 43

450kHz
W : –84.5dBm
N : –84.5dBm
CF501 W/N
/CF502
0.54Vrms
IC501 IC709
9
11
vel meter.
12dB SINAD.)
To make measurements in the AF section, connect the AC level meter.
(ANT input : –53dBm, 1kHz FM, 3kHz DEV (Wide)/1.5kHz DEV (Narrow))
The AF output level is adjusted for a 0.64V/8Ω by the front panel AF VOL control.
TX-RX Unit (VCO)
3.5dBm
Q6
Q9
C60 C62
To make measurements in the RF section, connect the RF Wattmeter (50Ω).
LEVEL DIAGRAM
W/N W/N
0.45Vrms 0.42Vrms
IC709 IC709
12 14
8 3 1
TX-RX Unit
–10dBm –3.7dBm
IC2
Q10
2
7
C67
Audio Frequency
W/N W/N
0.45Vrms 0.47Vrms
IC709
Q706
13
5 7
4.0dBm
Q303
D
D9
G S
C72
D10
TM-281A
W/N W/N W/N
10mVrms 0.70Vrms 0.64Vrms
IC705 IC715
1
15 10
J1
Power
Module
TX-RX Unit
65W: K,M2,M3
17dBm 25W: M4
IC302
D306/
D307
1
4 ANT
43