KM-255c misfeeds J4211

**blackcat4866** · 08-05-2015

This Hanabi will feed fine for an hour, then when it's ready it will jam every page for a while. It's always J4211 which is ES (eject sensor).

I changed the photointerrupter from scrap, which worked fine for about an hour. Then I though perhaps the two part flag linkage to the sensor was disengaging, because perhaps the gate was opening during feeding. So I used paper shims to shim that gate tightly closed. It worked nicely ... for about an hour. It did seem to primarily affect prints and internal reports, but that may be a coincidence. The main user had the wrong driver, and I thought I really had something ... for about an hour.

Firmware is up to date. I haven't yet removed the bridge unit, and examined the bridge switches/sensors. There are always three pages remaining: one most of the way into the bridge, one page 25mm into the fuser, and one page at the lip of tray #1. I do not suspect the tray #1 feed unit, and the feed unit itself has been replaced prior to my visit. I do not suspect the fuser drive.

Has anybody seen these J4211 jams? =^..^=

**copymech** · 08-05-2015

Remove and reinstall your bridge unit. you may find a faulty connection

**B0265** · 08-05-2015

You might find the solution in the attached file.

**blackcat4866** · 08-05-2015

Originally Posted by B0265

You might find the solution in the attached file.

Nice thought. That fuser is similar but does not have that spring/lever combination. =^..^=

**blackcat4866** · 08-05-2015

Originally Posted by copymech

Remove and reinstall your bridge unit. you may find a faulty connection

Does three times count? The bridge unit checks out visually. I'm leaning towards a heat issue affecting ES.

The machine jams without the bridge. I quoted a fuser. =^..^=

**jmaister** · 08-12-2015

theres a qa on this.

the cause is due to the main spring in the fuser drive pack binding.

the tip digs into the gear, and the other end catch on the metal plate so its tension kept building up to the point its strong enough to trip speed detection.(slowed)

the fix is to have two shims on each side of the spring so that the spring spins with the gear and the tension never increases. as well, bend the tips inward, or order new stock.

just lubing byitself is only good for 900 print... i tried that, but for permanent solution the shims are needed

**blackcat4866** · 08-12-2015

Originally Posted by jmaister

theres a qa on this.

the cause is due to the main spring in the fuser drive pack binding.

the tip digs into the gear, and the other end catch on the metal plate so its tension kept building up to the point its strong enough to trip speed detection.(slowed)

the fix is to have two shims on each side of the spring so that the spring spins with the gear and the tension never increases. as well, bend the tips inward, or order new stock.

just lubing byitself is only good for 900 print... i tried that, but for permanent solution the shims are needed

Terrific! Thanks jmaister. Do you recall the shaft size, so that I can have the right shims/spacers on-hand?

**jmaister** · 08-13-2015

Originally Posted by blackcat4866

Terrific! Thanks jmaister. Do you recall the shaft size, so that I can have the right shims/spacers on-hand?

QA_E044_2NP_0005_SB_rev.1.pdf

That's the QA.

there are 2 polislider washer, and I think Kyocera went screwy on one of the part No.

Washer A: diameter 20mm, thickness 0.5mm

Washer B: diameter 18mm, thickness 0.25mm

What's interesting about washer B is the actual part No. By this QA maybe they wanted to simplify it to be BC134840, but end up being 7BC06062J025C01<--- we ordered with this.

KDA has 1 case also point to the fuser itself, to cover all basis.

**blackcat4866** · 08-13-2015

Perfect, thanks.

**tmaged** · 08-13-2015

Originally Posted by jmaister

theres a qa on this.

the cause is due to the main spring in the fuser drive pack binding.

the tip digs into the gear, and the other end catch on the metal plate so its tension kept building up to the point its strong enough to trip speed detection.(slowed)

the fix is to have two shims on each side of the spring so that the spring spins with the gear and the tension never increases. as well, bend the tips inward, or order new stock.

just lubing byitself is only good for 900 print... i tried that, but for permanent solution the shims are needed

I tried searching the wonderful database for the QA, but nothing. Do you have the number or can you post the QA ?