TM-800 UHF SERVICE MANUAL
149
Terminal Function
1. Display Unit
Pin No.
Name
Description
J501 (To MIC Jack)
1
MBL
MIC backlight control signal output. “H”: On, “L”:Off.
2
PSB
Power outputs after power switch (13.6V
+
15%).
3 GND
Ground.
4
PTT/TXD
PTT signal input/ Serial data output.
5 ME
MIC
ground.
6
MIC
MIC signal input.
7
HOOK/RXD
Hook signal input/ Serial data input.
8
CM
Serial data input for keypad MIC.
J503(To DISPLAY UNIT)
1 VCC
+5V.
2 E
Ground.
3
LCDCK
Clock output for LCD driver.
4
LCDW
LCD data write.
5
LCDR
LCD data read.
6
LCDCS
LCD control signal output.
7 LCD
LCD
display
contrast.
8
LAMP
Power for backlight.
J504 (To DISPLAY UNIT)
1 ME
MIC
ground.
2
MIC
MIC signal output.
3 E
Ground.
4
REST
Reset signal input.
5
TXD2
Serial data output.
6
RXD2
Serial data input.
7 E
Ground.
8
PSW
Power switch control signal output.
9
SB
Power input after power switch (13.6V+15%).
10
SP1
BTL input for remote speaker output.
11
SP2
BTL input for remote speaker output...
J505 (To Speaker)
1
SP1
BTL input for remote speaker output.
2
SP2
BTL input for remote speaker output.
