Electronics; Explanation And Connection Of Main Pcb - KERN 573xxNM Service Manual

8 Electronics

8.1 Explanation and Connection of Main PCB

Pin 1: Power supply (-)
Pin 2: Power supply (+)
Pin 3: RS 232 (TXD)
Pin 4: RS 232 (RXD)
Pin 5: RS 232 (GND)
Load cell
+IN (+EX)
- IN (-EX)
Shield
+OUT (+SIG)
-OUT (-SIG)
10
Connection of
keyboard overlay
1 2 3 4 5
Series resistor
for backlight
(min. 50 ohm)
If required set solder bridge
to switch on the scale
automatically after plug in
the mains adapter (without
pressing the ON/OFF key)
Bottom Side
JTAG
Connection of
LCD display
Top Side
Resistor for
charging circuit
Connection
of LCD-
display
572-SH-e-0951