Kenwood TM-631A Service Manual page 18

TM-631A
DESCRIPTION
OF
ELEMENTS
Final Unit (X45-3350-10)
Components
Use/Function
Operation/Condition/Compatibility
Q1
Power amplifier 144 MHz
S-AV17:52 W
or more (with
APC
set OFF)
Q2 Transmitter driver 144 MHz
D02 pin:0.12 W, Q2's
collector:0.40
W
(with
APC OFF
for
M57726)
Q3 144 MHz protection, APC control Power control with
VR2,
Protection adjustment with VR3
06
Low Power switch
Turns OFF when operating with 144 MHz Low Power
Q50 Power amplifier 220 MHz
M57774:42 W
or more (with
APC
OFF)
Q51 Drive
stage
+
B
control
D1 Q2 idling
Anode voltage:0.6 V
(in
transmission)
D2,
3
Transmission/Reception select D2:
UM9401, D3:
MI308
for
144 MHz
D4
144 MHz
APC,
RF meter detection RF
meter adjustment with VR1,
APC adjustment
with
VR2,
144 MHz
144 MHz reflected wave detection
D5 Adjust with VR3, 15
W:ANT
is
open
D50
Power supply reverse connection protection
220
MHz
APC,
RF meter detection D51: MI407, D54: MI308 D51, 54
D52
220
MHz
APC, RF meter detection
Adjust with
VR
-7
on
220
MHz
TX-RX
unit,
Adjust with
VR
5 on
220 MHz
TX-RX
unit
D53 220 MHz reflected wave detection
Adjust
VR4
on
220 MHz
TX-RX
unit
Control Unit (X53-3250-10)
Components
Use/Function
Operation/Condition/Compatibility
IC1
Electronic volume (IC5) select
In normal operation
®
goes
''L''
evel
Between @) and @ turns
OFF
Remote operated condition with
RC-10
@ goes ''H"'
level.
AS Between @) and @ turns
ON
yy
TT,
CTCSS
MAIN/SUB select
CTCSS
MAIN/SUB select
MAIN:
@
goes
''L''
level. Between @ and (5 turns ON.
SUB
:
10 goes
''H''
level. Between
1
and
@
turns ON.
IC2 Electronic volume (IC5) select
In
normal operation
9
@,
1
goes
''L''
level.
6
Between @) and @ turns ON. between @) and @) turns
OFF
1 Between
@
and @ turns ON. between
@
and
15
turns
OFF
Between @
and @ turns
OFF.
AS
Remote operated condition with
RC-10
>8
@, @, @
goes
''H''
level.
Between
and
@
turns ON.
between
@ and (8) turns OFF
Between
@) and @ turns ON.
between @
and
@
turns ON.
Between
12
and
14
turns
OFF.
17
TM-631A
DESCRIPTION
OF
ELEMENTS
Final Unit (X45-3350-10)
Components
Use/Function
Operation/Condition/Compatibility
Q1
Power amplifier 144 MHz
S-AV17:52 W
or more (with
APC
set OFF)
Q2 Transmitter driver 144 MHz
D02 pin:0.12 W, Q2's
collector:0.40
W
(with
APC OFF
for
M57726)
Q3 144 MHz protection, APC control Power control with
VR2,
Protection adjustment with VR3
06
Low Power switch
Turns OFF when operating with 144 MHz Low Power
Q50 Power amplifier 220 MHz
M57774:42 W
or more (with
APC
OFF)
Q51 Drive
stage
+
B
control
D1 Q2 idling
Anode voltage:0.6 V
(in
transmission)
D2,
3
Transmission/Reception select D2:
UM9401, D3:
MI308
for
144 MHz
D4
144 MHz
APC,
RF meter detection RF
meter adjustment with VR1,
APC adjustment
with
VR2,
144 MHz
144 MHz reflected wave detection
D5 Adjust with VR3, 15
W:ANT
is
open
D50
Power supply reverse connection protection
220
MHz
APC,
RF meter detection D51: MI407, D54: MI308 D51, 54
D52
220
MHz
APC, RF meter detection
Adjust with
VR
-7
on
220
MHz
TX-RX
unit,
Adjust with
VR
5 on
220 MHz
TX-RX
unit
D53 220 MHz reflected wave detection
Adjust
VR4
on
220 MHz
TX-RX
unit
Control Unit (X53-3250-10)
Components
Use/Function
Operation/Condition/Compatibility
IC1
Electronic volume (IC5) select
In normal operation
®
goes
''L''
evel
Between @) and @ turns
OFF
Remote operated condition with
RC-10
@ goes ''H"'
level.
AS Between @) and @ turns
ON
yy
TT,
CTCSS
MAIN/SUB select
CTCSS
MAIN/SUB select
MAIN:
@
goes
''L''
level. Between @ and (5 turns ON.
SUB
:
10 goes
''H''
level. Between
1
and
@
turns ON.
IC2 Electronic volume (IC5) select
In
normal operation
9
@,
1
goes
''L''
level.
6
Between @) and @ turns ON. between @) and @) turns
OFF
1 Between
@
and @ turns ON. between
@
and
15
turns
OFF
Between @
and @ turns
OFF.
AS
Remote operated condition with
RC-10
>8
@, @, @
goes
''H''
level.
Between
and
@
turns ON.
between
@ and (8) turns OFF
Between
@) and @ turns ON.
between @
and
@
turns ON.
Between
12
and
14
turns
OFF.
17