TEC B-470 SERIES Maintenance Manual page 48

6. DIAG. TEST OPERATION
8
DIP SW Check
DIP SW
NOTE: The DIP switch 1-7 is to be set to 0 (OFF : OPEN) regardless of setting item.
9
EXP. I/O Check
EXP. I/O
For the loopback test, connect a jig as shown below and check HIGH output / HIGH input and LOW output
/ LOW input.
8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1
0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0
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
DIP Switch 2
0: OFF (OPEN)
1: ON (SHORT)
DIP Switch 1
0: OFF (OPEN)
1: ON (SHORT)
Connector: FCN-781P024-G/P
GND
Vcc
6-11
(Revision Date: Jan. 13, '95)
6.2 SELF TEST MODE
Pin No.
Status
EM18-33011
Fig. 6-3