Thermo Scientific 146i Instruction Manual page 176

Troubleshooting
Connector Pin Descriptions
6-14 Model 146i Instruction Manual
Table 6-3. Motherboard Connector Pin Descriptions, continued
Connector Reference
Label Designator
RS232/RS485:A P1:A
Pin Signal
Description
8 LD4 – LCD Signal
9 LD0 – LCD Signal
10 LD5 – LCD Signal
11 LD1 – LCD Signal
12 LD6 – LCD Signal
13 LD2 – LCD Signal
14 LD7 – LCD Signal
15 LD3 – LCD Signal
16 LCD Bias Voltage
17 +5V
18 Ground
19 Ground
20 LCD_ONOFF – LCD Signal
21 Keypad Row 2 Input
22 Keypad Row 1 Input
23 Keypad Row 4 Input
24 Keypad Row 3 Input
25 Keypad Col 2 Select
26 Keypad Col 1 Select
27 Keypad Col 4 Select
28 Keypad Col 3 Select
29 Ground
30 Ground
31 Ground
32 Ground
33 +24V
34 +24V
1 NC
2 Serial Port 1 RX (-RS485 IN)
3 Serial Port 1 TX (-RS485 OUT)
4 NC
5 Ground
6 NC
Thermo Fisher Scientific