TEC B-670 Series Maintenance Manual page 40

6. DIAG. TEST OPERATION
DIP SW Check
DIP SW
NOTE: The DIP switch 1-7 is to be set to 0 (OFF:OPEN) regardless of setting item.
EXP. I/O Check
EXP. I/O
For the loopback test, connect jig as shown below and check HIGH output / HIGH input and LOW
output / LOW input.
1 2 3 4 5
8 7 6 5 4 3 2 1
0 0 0 0 0 0 0 0
OK
Loopback test
Expansion I/O PC board
300Ω x 5
7 8 9 10 11
12 15
300Ω
Vcc
8 7 6 5 4 3 2 1
1 0 0 0 1 0 1 0
DIP Switch 2
DIP Switch 1
0: OFF (OPEN)
1: ON (SHORT)
OK: The circuit has no problem.
NG: The circuit has a problem or loopback jig
is not attached.
Connecter: FCN-781P024-G/P
21
GND
6-11
Pin No.
Status
0: OFF (OPEN)
1: ON (SHORT)
Fig. 6-3
EM18-33017
6.2 SELF TEST MODE