Kenwood TS-590SG, Service Manual

Page: 25 / 155

TS-590SG
25
Ref. No. Use / Function Operation / Condition / Compatibility
Q921,922 Switching
Power supply control of RX circuit
(ON during reception)
Q924 Switching
Power supply control of FM circuit
(ON when TX FM mode is selected)
Q925 Switching
RX power supply control
(ON during transmission)
Q952 Amplifi er
TX IF amplifi er (73.095MHz)
Gain is controlled according to
the ALC voltage
D11,12 Clipper External modulation input
D13
Reverse current
prevention
External standby
D14 Surge protection ACC2 connector (5-pin SQC)
D15 Surge protection ACC2 connector (9-pin PKS)
D17
Reverse current
prevention
Linear amplifi er control signal
D18 Surge absorption Relay (K11)
D19
Reverse current
prevention
Linear amplifi er control signal
D20~23
Reverse current
prevention
Paddle/key control line
D24 Surge protection ACC2 connector (2-pin RTTY)
D25
Reverse current
prevention
Linear amplifi er control signal
D101 Surge absorption External RX antenna terminal
D102 Surge absorption Relay (K101)
D103 Surge absorption Relay (K102)
D104~107 Surge absorption Internal circuit protection
D108 Switching
RX/TX changeover, ON during
reception
D109,110 Switching
ON when receiving over
1.705MHz is selected
D111 Surge protection Receiver RF signal input
D131 Switching
ON when BPF of 522kHz~
1.705MHz is selected
D132 Switching
ON when BPF of 13.9~14.5MHz
is selected
D133 Switching
ON when BPF of 49~54MHz is
selected (TX only)
D134 Switching
ON when BPF of 6.9~7.5MHz is
selected
D135 Switching
ON when BPF of 30~522kHz is
selected
D136 Switching
ON when BPF of 1.705~2.5MHz
is selected
D137 Switching
ON when BPF of 2.5~4.1MHz is
selected
D138 Switching
ON when BPF of 4.1~6.9MHz is
selected
D139 Switching
ON when BPF of 7.5~10.5MHz is
selected
Ref. No. Use / Function Operation / Condition / Compatibility
D140 Switching
ON when BPF of 10.5~13.9MHz
is selected
D141 Switching
ON when BPF of 14.5~21.5MHz
is selected
D142 Switching
ON when BPF of 21.5~30MHz is
selected
D143 Switching
ON when BPF of 30~60MHz are
selected
D144 Switching
ON when BPF of 522kHz~
1.705MHz is selected
D145 Switching
ON when BPF of 30~522kHz is
selected
D146 Switching
ON when BPF of 1.705~2.5MHz
is selected
D147 Switching
ON when BPF of 2.5~4.1MHz is
selected
D148 Switching
ON when BPF of 4.1~6.9MHz is
selected
D149 Switching
ON when BPF of 6.9~7.5MHz is
selected
D150 Switching
ON when BPF of 7.5~10.5MHz is
selected
D151 Switching
ON when BPF of 10.5~13.9MHz
is selected
D152 Switching
ON when BPF of 14.5~21.5MHz
is selected
D153 Switching
ON when BPF of 21.5~30MHz is
selected
D154 Switching
ON when BPF of 30~60MHz are
selected
D155 Switching
ON when BPF of 13.9~14.5MHz
is selected
D156 Switching
ON when BPF of 49~54MHz is
selected (TX only)
D200 Surge absorption Relay (K103)
D231 Switching
ON when receiving preamplifi er
is OFF
D232 Switching
ON when receiving preamplifi er
is ON
D233 Switching
ON when receiving preamplifi er
is OFF
D234 Switching
ON when receiving preamplifi er
is ON
D235
Reverse current
prevention 1/2: Receiving ON at 21.5~30MHz
2/2: Receiving ON at 30~60MHz
D261,281 Switching
ON when RX 1st IF of 11.374MHz
is selected
D301 Switching
ON when RX 1st IF of 11.374MHz
(NB1 function OFF) is selected
D302 Switching
ON when RX 1st IF of 11.374MHz
(NB1 function ON) is selected
D321 Switching
ON when RX 1st IF of 73.095MHz
is selected
D323 Switching
RX/TX changeover, ON during
reception
COMPONENTS DESCRIPTION