All voltage measurements are made with the machine in MANUAL MODE with all options
which might impede the operation of the machine shut off.
All measurements are made with these settings unless specified otherwise. All inputs that are
listed as current sinking can be grounded to force the circuit on.
Note: Component saver timers should be turned to the highest setting prior to testing voltages to
ensure accuracy of readings.
Caution: If this method of trouble shooting is used, care should be taken to insure all personnel
and other equipment are clear of the machine since all safeties would be overridden.
TERM. MEASURE VOLTAGE DESCRIPTION
Open thermocouple alarm input to PLC. 0
volts equals normal operation. 24 V. D.C.
indicates open thermocouple.
0 V. D.C.J1-3,4J2-4
Negative J-thermocouple input (red wire)
direct to thermocouple IC. See above for
voltages.
-.01 to -.09
V. D.C.
J2-2J2-3
Positive J-thermocouple input (white wire)
referenced through 10 ohms to ground.
Approximately .015 V. D.C. at 75 degrees F
and .085 V D.C. at 400 degrees F. If no
voltage check for open thermocouple
indicator E13.
.01 to .09 V.
D.C.
J2-3J2-2
D.C. square wave proportional to the
temperature. Approximately 240 Hz. at room
temperature, 75 degrees F., and 2060 Hz. at
400 degrees F. (Volt meters without a
frequency scale will frequently average the
50% duty cycle on the D.C. Scale and display
any frequency as 12V. D.C.) If no output,
check open thermocouple indicator E13.
24 V. Square
Wave
(1Hz-5K
Hz.)
J1-3,4J2-1
Regulated Power Supply for valves and
control circuits. (If missing, and 35V. D.C.
is present, open jaw to disconnect valves and
control circuits to see if external short is
shutting it down.)
24 V. D.C.
Regulated
J1-3,4J1-7
Regulated Power Supply for PLC & Touch
Screen. (If missing and 35V. D.C. is present,
first unplug PLC, then Touch Screen to see if
external short is shutting it down.)
24 V. D.C.
Regulated
J1-3,4J1-6
Unregulated D.C. for Low Voltage Power
Supplies. (If missing and 28V. A.C. is
present, check F1 Power Supply fuse.)
35 V. D.C.J1-3,4J1-5
D.C. Ground0 V. D.C.J1-4
D.C. Ground0 V. D.C.J1-3
Low voltage A.C. for power supplies28 V. A.C.J1-1J1-2
Low voltage A.C. for power supplies28 V. A.C.J1-2J1-1
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