Kenwood TK-782 Service Manual page 34

Schematic diagram
Name I/O Function
CODE3 - Not used.
CODE4 - Not used.
SQ O Squelch signal output. Signal
logic type can select "Carrier
operate relay" or "Tone operate
relay". Active logic level or type
can select in the KPG-77D.
TXD1 O Serial data output 1
RXD1 I Serial data input 1
TXD2 O Serial data output 2
RXD2 I Serial data input 2
RSSI O Receive signal strength indication. RSSI
PTT I PTT
MPTT I MIC PTT
FSW I Foot switch input.
LOK
SB
TX-RX unit (A/2)
Foil side view
INSTALLATION /
PC board view
Name Unit
C3 TX-RX (A/2)
C4 TX-RX (A/2)
SQ TX-RX (A/2)
TD1 TX-RX (A/2)
RD1 TX-RX (A/2)
TD2 TX-RX (A/2)
RD2 TX-RX (A/2)
TX-RX (A/2)
PTT TX-RX (B/2)
MPTT TX-RX (B/2)
FW TX-RX (A/2)
E
DEO RD2 5C C4 C3
TD2 RD1
SQ OP
TD1 FW C2 C1
RSSI
Fig. 4 /
TX-RX unit (B/2) : Control section
Foil side view
MPTT
PTT
TK-782
TXAI
TXAO
RXAI
RXAO
33