Kenwood TM-D700A Service Manual

TM-D700A/E
CIRCUIT DESCRIPTION
6. AF Signal System
6-1. Beep circuit and mute circuit
A beep sound is generated by the CPU (C604) and goes to The signals output from the electronic volume (IC804) are
cross point switch (IC702). input to the speaker switching circuit and go through the audio
This signal is switched by the cross point switch (IC702) and mute circuit (Q804 and Q805). Then it is input to the power amp
are input to the electronic volume (IC804). While the beep (1C806).
signal is output from the microprocessor, audio signals for each
band are muted by the cross point switch (IC702) with the serial
data from the microprocessor (IC604).
ELECTRONIC
VOLUME
CROSS POINT SW MUTE POWER AMP
IC806
IC 702 A014 IC 804 R857 R874 13 B J802
RAV >— LAM, vy gos >4+ yy
IC 808
7
1 eo
Z a pad
A00 R858 7 3 MUTE CN80)
RAU >— Wyo |g | 875 1 6
oO WA Q805
IC 807 5 g
eo
a J801
ise)
&
a}; D803 z fond
wl s
Wi 5 CPU 1q—q— ;
IC 604
<4 <=
o=>
fom <=
ae
Fig.15 Beep circuit and mute circuit
13

Kenwood TM-D700A Specifications

General

Brand	Kenwood
Model	TM-D700A
Category	Transceiver
Language	English