TM 5-3810-307-24-1-2
4. NO DISPLAY - continued
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Measure voltage on main board in central unit between X1:1 (+24V)
and X1:3 (ground). Refer to Drawing 1, 3, 8 in Section 10.
Correct?
NO
Faulty wiring or connections between connection board
and main board in central unit. Check wiring connections.
YES
Measure voltage on connection board in central unit between X1:30 (+24V) and
X1:33 (ground). Refer to Drawing 1, 3 in Section 10.
Defective power supply on main board. Replace main
Correct?
NO
board and reset pressure channels.
Refer to Drawing 3 in Section 10 and Procedures 3, 4.
in Section 11.
YES
Measure voltage on heater control board in display console
between X2:1 (+24V) and X2:2 (ground).
Refer to Drawing 2, 9 in Section 10.
Correct?
NO
Fault between connection board in central unit
and heater control board in display console.
Check wiring. Refer to Drawing 2 in Section 10.
YES
Measure voltage on console connection board in display console between
X1:1 (+24V) and X1:2 (ground). Refer to Drawing 2 in Section 10.
YES
NO
Replace display console.
Replace heater control board in display console.
Refer to Drawing 2, 5 in Section 10.
Refer to Drawing 2, 5 in Section 10.
END
Change-1 G-11
