Amptec Research 630ES, Operation & Maintenance Manual

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A
B
G
F
C E
D
D.P.
SEGMENT PIN
A . . . . . . . . 1
B . . . . . . . . 13
C . . . . . . . . 10
D . . . . . . . . 8
E . . . . . . . . 7
F . . . . . . . . 2
G . . . . . . . . 11
D.P. . . . . . . . . 6
Common . . . . 14
PIN
1
2
3
4
5
6
7
PIN
14
13
12
11
10
9
8
Figure E-4. LED Display Pin Functions
E-8. Relay Board General Operation
The internal 630ES PCB labeled “620-relay
board” replaces the range switch S1 on the main
board. IC-1 is actually a ribbon cable header
that goes to the top panel and connects to the
range push buttons (covered by silicone rubber
boots) and their corresponding panel mount
LEDS. IC-2 is a latch that will latch its output to
the corresponding range push button input. Its
output turns on the front panel LED (acts as an
range mode indicator LED) and a corresponding
relay that connects to the main PCB to select the
range. RL1 is for the 20-Ohm range, RL2 is for
the 200-Ohm range, RL3 is for the 2K Ohm
range, and RL4 is for the 200K Ohm range.
A
B
G
F
C E
D
D.P.
SEGMENT PIN
A . . . . . . . . 1
B . . . . . . . . 13
C . . . . . . . . 10
D . . . . . . . . 8
E . . . . . . . . 7
F . . . . . . . . 2
G . . . . . . . . 11
D.P. . . . . . . . . 6
Common . . . . 14
PIN
1
2
3
4
5
6
7
PIN
14
13
12
11
10
9
8
Figure E-4. LED Display Pin Functions
E-8. Relay Board General Operation
The internal 630ES PCB labeled “620-relay
board” replaces the range switch S1 on the main
board. IC-1 is actually a ribbon cable header
that goes to the top panel and connects to the
range push buttons (covered by silicone rubber
boots) and their corresponding panel mount
LEDS. IC-2 is a latch that will latch its output to
the corresponding range push button input. Its
output turns on the front panel LED (acts as an
range mode indicator LED) and a corresponding
relay that connects to the main PCB to select the
range. RL1 is for the 20-Ohm range, RL2 is for
the 200-Ohm range, RL3 is for the 2K Ohm
range, and RL4 is for the 200K Ohm range.