Kenwood TM-321A Service Manual page 14
220mhz fm transceiver
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Also See for TM-321A:
- Instruction manual (60 pages) ,
- Instruction manual (30 pages) ,
- Instruction manual (39 pages)
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TM-32
DESCRIPTION OF ELEMENTS
SQL (X59-3150-00)
Element
Function
Description
Qi
Noise amplifier
Q2
Squelch switching
ON when
squeltch is
on,
Q3,04
DC amplifier
OFF
when squelch
is
on,
Q5
Low-frequency amptitier
For
RD
terminal.
06
Low-frequency amplifier
OFF
when squelch
is
on.
D1
Squelch
noise
rectifier
D2
Base bias
setting
MIC
(X59-3160-00)
Element
Function
Description
1C1(1/2)
Low-frequency amplifier
@
Output,
@
Input.
1C1(2/2)
Low-frequency amplifier
For
microphone check.
©
Input
@
Output.
1C2(1/2)
Limiting amplifier
@
Output
@
Input.
1C2(2/2)
LPF
©,@
Output.
VOL
(X59-3170-00)
Element
Function
Description
®
Output,
Electronic
volume control
@
Input.
(16 steps, initialized to the
®
Initialize input
:
''L''
>
step 6.
IC1
6th step from the
®
Increase
(''L''
input
raises
the volume
1
step).
bottom)
Decrease
(''L''
input lowers the volume
1
step)
"H''
while operating.
@
controlled by
®
®
controlled by
®
Ic2
Bidirectional switch (4 circuits)
controlled by
®
controlled by
@
Qi
Bidirectional switch enable
ON to enable electronic volume
control.
Q2
Switching
ON
to
decrease
by
1
step.
Q3
Switching
ON to
increase
by
1
step.
D1
Voltage
drop
15
TM-32
DESCRIPTION OF ELEMENTS
SQL (X59-3150-00)
Element
Function
Description
Qi
Noise amplifier
Q2
Squelch switching
ON when
squeltch is
on,
Q3,04
DC amplifier
OFF
when squelch
is
on,
Q5
Low-frequency amptitier
For
RD
terminal.
06
Low-frequency amplifier
OFF
when squelch
is
on.
D1
Squelch
noise
rectifier
D2
Base bias
setting
MIC
(X59-3160-00)
Element
Function
Description
1C1(1/2)
Low-frequency amplifier
@
Output,
@
Input.
1C1(2/2)
Low-frequency amplifier
For
microphone check.
©
Input
@
Output.
1C2(1/2)
Limiting amplifier
@
Output
@
Input.
1C2(2/2)
LPF
©,@
Output.
VOL
(X59-3170-00)
Element
Function
Description
®
Output,
Electronic
volume control
@
Input.
(16 steps, initialized to the
®
Initialize input
:
''L''
>
step 6.
IC1
6th step from the
®
Increase
(''L''
input
raises
the volume
1
step).
bottom)
Decrease
(''L''
input lowers the volume
1
step)
"H''
while operating.
@
controlled by
®
®
controlled by
®
Ic2
Bidirectional switch (4 circuits)
controlled by
®
controlled by
@
Qi
Bidirectional switch enable
ON to enable electronic volume
control.
Q2
Switching
ON
to
decrease
by
1
step.
Q3
Switching
ON to
increase
by
1
step.
D1
Voltage
drop
15
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