APPENDIX 4 SYSTEM MODE EO1-33032
A4.8 Additional Information
A4-23
A4.8.1 Self-Diagnostic Test Result Sample and Descriptions (Cont.) Print Head Resistance Rank Table
Rank Average resistance (ohm) Rank Average resistance (ohm)
0 1409 to 1454 4 1219 to 1265
1 1361 to 1408 5 1171 to 1218
2 1314 to 1360 6 1124 to 1170
3 1266 to 1313 7 1076 to 1123
(8) DIP Switch Status
DIP SW 1: ON 2: OFF 3: OFF
(9) Expansion I/O Interface Check
EXP.I/O OK
(10) DIN Connector for the Keyboard (KB-80) Check
KEY BRD OK
Loopback test
OK: The circuit has no problem.
NG: The circuit has a problem or loopback jig is not attached.
Expansion I/O PC board
OK: The connector has no problem.
NG: The connector has a problem or loopback jig is not attached.
DIN Connector for the KB-80 keyboard
Connector: FCN-781P024-G/P
• • • • • • • • • •
• • •
300Ω×5
300Ω Vcc
GND
1 2 3 4 5 7 8 9 10 11
12 15 21
DIN Connector: TCS7588-01-201
Pin 3 and Pin 4 are short-circuited.
Pin 5 and Pin 6 are short-circuited.
1
2
3
4
5
6
7
8