Specifications

RMU800A SERVICE MANUAL
－ 137 －
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.