Kenwood TS-590SG Service Manual page 25

Ref. No. Use / Function
Power supply control of RX circuit
Q921,922 Switching
(ON during reception)
Power supply control of FM circuit
Q924 Switching
(ON when TX FM mode is selected)
RX power supply control
Q925 Switching
(ON during transmission)
TX IF amplifi er (73.095MHz)
Q952 Amplifi er Gain is controlled according to
the ALC voltage
D11,12 Clipper External modulation input
Reverse current
D13 External standby
prevention
D14 Surge protection ACC2 connector (5-pin SQC)
D15 Surge protection ACC2 connector (9-pin PKS)
Reverse current
D17 Linear amplifi er control signal
prevention
D18 Surge absorption Relay (K11)
Reverse current
D19 Linear amplifi er control signal
prevention
Reverse current
D20~23 Paddle/key control line
prevention
D24 Surge protection ACC2 connector (2-pin RTTY)
Reverse current
D25 Linear amplifi er control signal
prevention
D101 Surge absorption External RX antenna terminal
D102 Surge absorption Relay (K101)
D103 Surge absorption Relay (K102)
D104~107 Surge absorption Internal circuit protection
RX/TX changeover, ON during
D108 Switching
reception
ON when receiving over
D109,110 Switching
1.705MHz is selected
D111 Surge protection Receiver RF signal input
ON when BPF of 522kHz~
D131 Switching
1.705MHz is selected
ON when BPF of 13.9~14.5MHz
D132 Switching
is selected
ON when BPF of 49~54MHz is
D133 Switching
selected (TX only)
ON when BPF of 6.9~7.5MHz is
D134 Switching
selected
ON when BPF of 30~522kHz is
D135 Switching
selected
ON when BPF of 1.705~2.5MHz
D136 Switching
is selected
ON when BPF of 2.5~4.1MHz is
D137 Switching
selected
ON when BPF of 4.1~6.9MHz is
D138 Switching
selected
ON when BPF of 7.5~10.5MHz is
D139 Switching
selected
COMPONENTS DESCRIPTION
Operation / Condition / Compatibility Ref. No. Use / Function
D140 Switching
D141 Switching
D142 Switching
D143 Switching
D144 Switching
D145 Switching
D146 Switching
D147 Switching
D148 Switching
D149 Switching
D150 Switching
D151 Switching
D152 Switching
D153 Switching
D154 Switching
D155 Switching
D156 Switching
D200 Surge absorption
D231 Switching
D232 Switching
D233 Switching
D234 Switching
Reverse current
D235
prevention
D261,281 Switching
D301 Switching
D302 Switching
D321 Switching
D323 Switching
TS-590SG
Operation / Condition / Compatibility
ON when BPF of 10.5~13.9MHz
is selected
ON when BPF of 14.5~21.5MHz
is selected
ON when BPF of 21.5~30MHz is
selected
ON when BPF of 30~60MHz are
selected
ON when BPF of 522kHz~
1.705MHz is selected
ON when BPF of 30~522kHz is
selected
ON when BPF of 1.705~2.5MHz
is selected
ON when BPF of 2.5~4.1MHz is
selected
ON when BPF of 4.1~6.9MHz is
selected
ON when BPF of 6.9~7.5MHz is
selected
ON when BPF of 7.5~10.5MHz is
selected
ON when BPF of 10.5~13.9MHz
is selected
ON when BPF of 14.5~21.5MHz
is selected
ON when BPF of 21.5~30MHz is
selected
ON when BPF of 30~60MHz are
selected
ON when BPF of 13.9~14.5MHz
is selected
ON when BPF of 49~54MHz is
selected (TX only)
Relay (K103)
ON when receiving preamplifi er
is OFF
ON when receiving preamplifi er
is ON
ON when receiving preamplifi er
is OFF
ON when receiving preamplifi er
is ON
1/2: Receiving ON at 21.5~30MHz
2/2: Receiving ON at 30~60MHz
ON when RX 1st IF of 11.374MHz
is selected
ON when RX 1st IF of 11.374MHz
(NB1 function OFF) is selected
ON when RX 1st IF of 11.374MHz
(NB1 function ON) is selected
ON when RX 1st IF of 73.095MHz
is selected
RX/TX changeover, ON during
reception
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