Johnson T7000 PRO, Service Manual, Page: 34 / 56

34
No display on console
Possible causes:
1. Breaker is damaged.
2. ON/OFF switch is damaged.
3. MCB is damaged
4. Digital communication cable is damaged
5. PCB is damaged
Fix:
1. Inspect the circuit breaker to see if it has tripped off.
(If it is tripped off….like diagram B , reset the breaker. And check
which part is short-circuited. Then replace the short-circuited part.)
A B
2. The switch is turned to the "ON" position.
( If the switch light isn't lit, replace the switch.)
2-1 Verify wire connection
N
&
L
on the MCB
.
(Please refer the” MCB WIRING” ……page 17)
3. Verify the MCB whether supply the +12VDC for console.
4. Replace digital communication cable .
5. Replace PCB