PRESS C71HC Warm up Failure

[inutel42]

Good Day,

I have this issue which is new to me. Here's what happen.
Client was printing multiple sets JOB C71HC, Electrical Fluctuations happen.
Then this happen to the unit:
1. Last output was unfused.
2. Keeps warming up for 30 minutes onward with out error.

Now the client decided to shut down the machine and call tech for help. F day, tech arrive turned on the machine.
here what he had encounter.
1. Lower Fuser Lamp - Not heating. Not turning on.
2. Error C3511 - Related to TH2 which was replace few weeks ago along with sensors and lamp. Btw Upper fuser heater was turning on.

As further checking, AVR was rated only at 184V output (220v country). All fuser lamps Upper and Lower have continuity. All Thermostat have continuity. So in normal operation, Lower Fuser Lamp should Lit on. But it did not. I/O check was done and confirmed that lower fuser lamp was not turning on and not heating. But what troubles the tech was the error which not even related to the lower fuser temperature.

Looked down to board level on PRCB, all ICP (IC protection) was intact and non cut off.

If you guys have encountered it, i might need some comments and suggestion. Will start to focus on PRCB and DCPU\1 which might get hit with that fluctuation.
Comments and suggestions are very welcomed.

Thank you.

[qkaqlenfrl]

Check the lamp with a multimeter. Then check the thermostat.
If it is normal, both should be connected and a beep should sound.

The upper fusing lamp has a 2-pin connector on one side and a 3-pin connector on the other side, so the number of connectors is different. 2 pins of the 3-pin connector are connected to 1 pin of the 2-pin connector on the other side, so you can check the connection with a multimeter.

[inutel42]

Check the lamp with a multimeter. Then check the thermostat.
If it is normal, both should be connected and a beep should sound.

The upper fusing lamp has a 2-pin connector on one side and a 3-pin connector on the other side, so the number of connectors is different. 2 pins of the 3-pin connector are connected to 1 pin of the 2-pin connector on the other side, so you can check the connection with a multimeter.

Good day. Thanks for the heads up. but as already stated on the original post, all lamps were tested and checked for continuity. All including the thermostat have continuity on multi tester.

[romario]

Good Day,

I have this issue which is new to me. Here's what happen.
Client was printing multiple sets JOB C71HC, Electrical Fluctuations happen.
Then this happen to the unit:
1. Last output was unfused.
2. Keeps warming up for 30 minutes onward with out error.

Now the client decided to shut down the machine and call tech for help. F day, tech arrive turned on the machine.
here what he had encounter.
1. Lower Fuser Lamp - Not heating. Not turning on.
2. Error C3511 - Related to TH2 which was replace few weeks ago along with sensors and lamp. Btw Upper fuser heater was turning on.

As further checking, AVR was rated only at 184V output (220v country). All fuser lamps Upper and Lower have continuity. All Thermostat have continuity. So in normal operation, Lower Fuser Lamp should Lit on. But it did not. I/O check was done and confirmed that lower fuser lamp was not turning on and not heating. But what troubles the tech was the error which not even related to the lower fuser temperature.

Looked down to board level on PRCB, all ICP (IC protection) was intact and non cut off.

If you guys have encountered it, i might need some comments and suggestion. Will start to focus on PRCB and DCPU\1 which might get hit with that fluctuation.
Comments and suggestions are very welcomed.

Thank you.

Good morning, something similar happened to me on a c1060 and after checking everything, the last option I had was to have these 2 Power Supply boards / 1 and DC Power source /2 checked, to be honest I don't remember which of the 2 was damaged but I know Once the problem was solved, I sent them to an email
dataurl584430.png