HP 5890 Series II User Manual

SVC 6-3
Heated Zone Troubleshooting
Problem Probable Cause Corrective Action
1. One heated zone tempera-
ture runs away.
a. Heater partially shorted to
chassis (grounded).
1. Replace heater and sensor.
b. Faulty main PCB. 1. Replace main PCB (refer to
Section 9).
2. One heated zone will not
heat.
a. Heater partially shorted to
chassis (grounded).
1. Replace heater and sensor.
b. Faulty main PCB. 1. Replace main PCB (refer to
Section 9).
3. None of the heated zones
will heat, but the oven is
ok.
a. Faulty F3 fuse on main
PCB.
1. Check main PCB fuse F3;
replace if required.
b. Faulty main PCB. 1. Replace main PCB (refer to
Section 9).
4. None of the heated zones
will heat, and the oven will
not heat.
a. Faulty main PCB. 1. Replace main PCB (refer to
Section 9).
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HP 5890 Series II Specifications

General

Brand	HP
Model	5890 Series II
Category	Measuring Instruments
Language	English