[Electrical] TA 4052ci with C6220 problems

[Larhal]

Hi All,

Well in short I am back working part time.

Was asked to do maintenance kit A and B on a TA4052ci. Counters were 400129 colour and 886092 B&W (1,2886,221 total). Firmware was up to date. When I get there the unit had a C6220 code. Edge thermistor high temperature error. Ok So I was changing the Fuser anyway. Powered down the machine, unplugged from wall and proceeded to do the installation. When Finished I powered up the unit and it came back with the C6220 code. Ok so I pulled the fuser and checked the pins in on the unit, all ok. Looked at the socket in the unit and did not note any issues. Reset fuser powered up and still pulled the code. I next opened the back of the unit and checked the YC22 connector. ok and then re seated it also the feed image PWB to Engine PWB connections. Same problem.
Went back to the shop and grabbed a known good fuser and tested the new fuser, it was ok. Returned to the customer and installed. Same code comes up. I checked the continuity from the drawer connector on the fuser station to the connector YC22 No issues or breaks. Did the same with the connectors between the feed image PCB and the engine PCB with no issues or breaks.

I called the shop and the boss was sending out a loaner to hold them while we dig deeper into this at the shop.

Last possibility are engine pwb, feed pwb and fuser IH unit.

Has anyone have any experiences with this problem?

[blackcat4866]

Re: TA 4052ci with C6220 problems

I've had the Feed PWB cause this error. =^..^=

[Larhal]

Re: TA 4052ci with C6220 problems

As always BC your there in a pinch with your experience. Thank you. I will see if we have a known good one to test with.

[blackcat4866]

Re: TA 4052ci with C6220 problems

The Feed PWB is mainly a relay PWB routing the various signals to the engine board. It seems to be a weak link in the chain.

It sounds like you were quite thorough in your investigation. Yes, most times these fuser codes come back to the rust generating Iris fusers. =^..^=

[Larhal]

Re: TA 4052ci with C6220 problems

The Feed PWB is mainly a relay PWB routing the various signals to the engine board. It seems to be a weak link in the chain.

It sounds like you were quite thorough in your investigation. Yes, most times these fuser codes come back to the rust generating Iris fusers. =^..^=

BC I am old school, not a parts changer. Love to tackle issues methodically and with the service manual at hand.
.

[Larhal]

Re: TA 4052ci with C6220 problems SOLVED

When I went back to the shop today, I pulled the Feed PWB and replaced it with a known good one. No Codes after that. Finished the setting for the maintenance kits and she is good to go back to the customer.

This is what I found on the back of the PCB. Looks like water ingress and there are dried deposits on the board. Searched everywhere to see if I could find out where it came from but no tell tail signs.

Feed PWB.jpg

[BillyCarpenter]

Re: TA 4052ci with C6220 problems SOLVED

When I went back to the shop today, I pulled the Feed PWB and replaced it with a known good one. No Codes after that. Finished the setting for the maintenance kits and she is good to go back to the customer.

This is what I found on the back of the PCB. Looks like water ingress and there are dried deposits on the board. Searched everywhere to see if I could find out where it came from but no tell tail signs.

[ATTACH=CONFIG]54452[/ATTACH]

blackcat is undefeated.

[blackcat4866]

Re: TA 4052ci with C6220 problems

Nice catch! The mineral deposits indicate that the PWB definitely got wet at some time or another. And it can cause very strange inexplicable symptoms.

Congratulations on your success. =^..^=

[Larhal]

Re: TA 4052ci with C6220 problems

Nice catch! The mineral deposits indicate that the PWB definitely got wet at some time or another. And it can cause very strange inexplicable symptoms.

Congratulations on your success. =^..^=

Thank you BC.

I did a little experiment last night on that bad Feed PWB. Since the mineral deposits were only on the back side, I cleaned the back of the board with demineralized water and used a toothbrush, new, and scrubbed it well. Looking at the board after drying with a loop I could see the mineral deposits were under the SMC's so I soaked the back of the board in a shallow pan of DM water for 30 minutes. Rescrubbed the board targeting the areas where I had noticed the mineral deposits, dried it with a air gun and the used IPA to rinse the whole board again using a air gun to blow it dry.

OK this morning I reinstalled the board into a known good machine and it worked!!!

Here is the cleaned board.

Feed PWB 2.jpg

[Larhal]

Re: TA 4052ci with C6220 problems Fuser

The Feed PWB is mainly a relay PWB routing the various signals to the engine board. It seems to be a weak link in the chain.

It sounds like you were quite thorough in your investigation. Yes, most times these fuser codes come back to the rust generating Iris fusers. =^..^=

Ok I know I have too much time on my hands.

The Rust had intrigued me. So I took apart an old Iris fuser that had thrown C6220 codes in another machine. What I found was not rust, Looks like it but not. It was part of the heater lubricant strip that had frayed. the frayed material can also be seen on the edge thermistor causing the code. Interesting?

Iris Fuser Rust.jpg

[copiertec]

Re: TA 4052ci with C6220 problems Fuser

Ok I know I have too much time on my hands.

The Rust had intrigued me. So I took apart an old Iris fuser that had thrown C6220 codes in another machine. What I found was not rust, Looks like it but not. It was part of the heater lubricant strip that had frayed. the frayed material can also be seen on the edge thermistor causing the code. Interesting?

[ATTACH=CONFIG]54466[/ATTACH]

What is the count on that fuser?

[Larhal]

Re: TA 4052ci with C6220 problems Fuser

What is the count on that fuser?

The fuser count was 286449, as stated on the warranty sheet. Way below life. Don't know the way they used it as I do not have any maintenance reports from that machine.

[BillyCarpenter]

Re: TA 4052ci with C6220 problems Fuser

Ok I know I have too much time on my hands.

The Rust had intrigued me. So I took apart an old Iris fuser that had thrown C6220 codes in another machine. What I found was not rust, Looks like it but not. It was part of the heater lubricant strip that had frayed. the frayed material can also be seen on the edge thermistor causing the code. Interesting?

[ATTACH=CONFIG]54466[/ATTACH]

It's that kind of curisoity and dedication that take a copier tech to a higher level. Keep up the good work.

[blackcat4866]

Re: TA 4052ci with C6220 problems

That's a great discovery. That same (or similar) teflon fabric is used on various other film fuser units.

On low speed Kyocera fusers that fabric can dry out, leaving it unlubricated. The fuser becomes more difficult to turn, and you can get some combination of jams, noises, and drive errors. Knowing it doesn't help much though, since individual parts are not available for that fuser, and as you found out, it's not so easy to disassemble.

On Toshiba fusers of this type the lubrication gradually diminishes. The teflon fabric rips, and wraps around the core, causing wrinkles in the fixing film. Kudos to Toshiba for making it easier to service.

I think it all comes down to over-promising. These fusers just don't last anywhere near as long as they are promised to.

=^..^=