PGC5000
PGC5000 Series Service Instructions
6 Component repair
SI/PGC5000-EN, rev B
44
6.6.4 Removing a sensor pcb
The Zones are arranged in the EPC Control Assembly enclosure with Zone 1 on the left and Zone 5 on the right (see Figure 6.8).
Proportional
Valve
Sensor PCB
Heater
Control PCB
Fig. 6.8. EPC Control Assembly Components
1. Perform the “Preparation” procedure.
2. Remove the four screws holding the top panel on the front of the oven.
3. Remove the ten screws holding the EPC Control Assembly cover and remove the cover; retain the screws for later use.
4. Unplug the large ribbon cable from the Control PCB and fold it back to your left and out of the way (see Figure 6.9).
AC Power Cable from
Backplane PCB J44
Sensor PCB Cable,
Zone 1
Sensor PCB Cable,
Zone 2
Sensor PCB Cable,
Zone 3
Sensor PCB Cable,
Zone 4
Sensor PCB Cable,
Zone 5
Large Ribbon Cable
from EPC
Multibus PCB
Heater Cable
Valve Cable, Zone 5
Valve Cable, Zone 4
Valve Cable, Zone 3
Valve Cable, Zone 2
Valve Cable, Zone 1
Fig. 6.9. EPC Control PCB Cabling
5. Locate the Sensor PCB to be replaced.
If more than one zone is being replaced, they must be replaced starting with the highest numbered zone
(right side) and proceeding to the lowest numbered zone (left side).
6. Unplug the Sensor PCB from the Controller PCB.
7. Using a 1.5 mm hex socket wrench, loosen the screws that retain the Sensor PCB.
8. Slide the Sensor PCB out from under the mounting plate and remove it from the EPC Controller Assembly.
