Single Door Power Supply; 12 Volt Check At Q2 Emitter; 12 Volt Check At Q2 Base - Norcold 600 Repair Manual

9. Check that the Humidity/Stor-
age switch (Figure 11.20) (2
door models only) is set to
NORMAL or HIGH HUMIDITY.
10. For the single door models,
check that the two blue wires,
terminals J10 & J12, are con-
nected together as shown by
Figure 11.25.
11. With the volt-ohm-meter set
to measure 12 volts DC,
check for 12 volts at the emit-
ter of transistor Q2 as shown
in Figure 11.26.
A. If you do not have 11-12
volts as shown, connect
J10 and J12 together as
shown in Figure 11.25 (two-
door models only).
B. If you now have 11-12 volts
at the emitter of Q2 there is
an open circuit in the har-
ness to the NORMAL STOR-
AGE HIGH HUMIDITY switch
and it must be repaired.
(See wiring pictorial at the
back of this section.)
12. Set the Mode Selector switch to
AUTO (on 3-Way models set to
DC OFF). The AC light on the
Eyebrow should be illuminated.
13. If the AC light is not illuminated,
you must do some more testing
to find the problem.
14. With Mode Selector at AUTO
and 12 Volt present at the
emitter of Q2, check for 10
volts DC at the base of tran-
sistor Q2 on the Power Sup-
ply as shown by Figure 11.27.
If you do not have 10 volts
the Power Supply is defective
and must be replaced.
Figure 11.25

Single Door Power Supply

AC and DC power con-
nected but not shown
Figure 11.26

12 Volt Check at Q2 Emitter

AC and DC power con-
nected but not shown
Figure 11.27

12 Volt Check at Q2 Base

40
J10, J12 Jumper
Connection
AC and DC power con-
nected but not shown