IBM V03 Maintenance Information page 134

Attention: Allow the printhead to cool before taking resistance measurements.
To measure the resistance of the coil for print wire 1A, measure between pins 1 and 2 of the 22-pin cable connector.
18-Wire printhead resistance checks
22-Pin printhead connector
Pin Name
1 Wire 1A coil
3 Column A shifter coil
5 Wire 2A coil
7 Wire 3A coil
9 Wire 4A coil
11 Wire 5A coil
13 Wire 6A coil
15 Wire 7A coil
17 Wire 8A coil
19 Wire 9A coil
21 Wire 9B coil
Pin Name
2 Wire 1A coil
4 Column B shifter coil
6 Wire 2A coil
8 Wire 3A coil
10 Wire 4A coil
12 Wire 5A coil
14 Wire 6A coil
16 Wire 7A coil
18 Wire 8A coil
20 Wire 9A coil
22 Wire 9B coil
26-Pin printhead connector
Pin Name
1 To encoder connector
pin 1
3 To encoder connector
pin 3
5 Thermal sensor ground
7 Wire 2B coil
9 Wire 3B coil
11 Wire 4B coil
13 Wire 8B coil
15 Wire 7B coil
17 Wire 6B coil
19 Wire 5B coil
21 Wire 1B coil
23 To ribbon lift connector
pin 2
25 To ribbon lift connector
pin 1
Pin Name
2 To encoder connector
pin 2
4 To encoder connector
pin 4
6 Thermal sensor
8 Wire 2B coil
10 Wire 3B coil
12 Wire 4B coil
14 Wire 8B coil
16 Wire 7B coil
18 Wire 6B coil
20 Wire 5B coil
22 Wire 1B coil
24 To ribbon lift connector
pin 3
26 To ribbon lift connector
pin 4
Chapter 3. Wiring diagrams
134