Kenwood TK-782 Service Manual page 33

TK-782
Connector Pin Pin I/O
No. No. name
CN4 1 LOK O TX logic signal output. Active logic
2 RXD
3 TXD O Serial data output 1. "Com1" port
CN6 1 SP O Output for internal/external speaker.
2 E
3. Optional Board Terminal
Terminal is for mounting the option board are provided at
the TX-RX unit (A/2) and TX-RX unit (B/2); Control section.
The table below shows the correspondence between the
board and terminals. Disconnect R529 and R571 in control
unit when the scrambler board is attached.
The table below shown the differences between the sche-
matic terminals and the PC board terminals.
Schematic diagram
Name I/O
SB O Switched B+ (13.6V, 0.75A)
5C O 5C
GND - Earth
DEO O Detect signal output (Output
level : 250mVrms; standard
modulation)
RXAI I RX audio input
RXAO O RX audio output
TXAI I TX audio input
TXAO O TX audio output
LOK O TX logic signal output.
Active type can be selectable
in the KPG-77D.
OPT - Auxiliary B output.
(EMG)
CODE1 O PLL unlock signal output.
Active type can be selectable
in the KPG-77D.
CODE2 O MIC hook logic signal output.
Active type can be selectable
in the KPG-77D.
32
INSTALLATION /
Function
level is low. Active type can be
selectable in the KPG-77D.
I Serial data input 1. "Com1" port
must be select "DATA"/"GPS"
function in the KPG-77D.
must be select "DATA"/"GPS"
function in the KPG-77D.
- Earth.
PC board view
Function Name
SB TX-RX (A/2)
5C TX-RX (A/2)
E TX-RX (A/2)
DEO TX-RX (A/2)
RXAI TX-RX (B/2)
RXAO TX-RX (B/2)
TXAI TX-RX (B/2)
TXAO TX-RX (B/2)
LOK TX-RX (A/2)
OP TX-RX (A/2)
C1 TX-RX (A/2)
C2 TX-RX (A/2)
Unit