Konica Minolta Bizhub 658 - jams from tray 1, 2 and bypass

[Rad01]

Hey Gents...

I've inherited this issue on a BH658. Hence why i hate doing private/non contract chargeable jobs)

Client called me up and got me to checkout their machine as they've had numerous techs work on device but couldn't resolve.

I was asked to get the device running as they were instructed by a few techs that they need to replace the main pcb assy.

The client sourced a board from someone upcountry and the last tech came to fit but wasn't able to get device running after fitting the board.

I arrived there to find the device stripped and all parts/screws in a box next to device.
With no history on the device at all i went ahead assembled whats needed to get device started up. Obviously all sorts of errors appeared on screen after i eventually managed to get it powered up.

Their initial problem was that the device would jam in tray 1 (jam 1102), jam in tray 2 (jam 1201), jam in tray 3 (jam 1601) bypass not operational at all as it errors out when trying to use it.

The replacement board came from a secure government environment which had hdd encryption and all sorts of restrictions enabled. Original main pcb gone with tech who last worked on the device.

Long story short eventually got around all errors and restrictions and upped firmware to GC2-X4 and managed to get tray 3 to print but still have the issue of T1, T2 jamming and bypass inoperable.

I've heard about the drive assy that has the one ways that seize and gears that damage and in my research found it here but after finally getting hold of one of the many techs that worked on this device he advised that the drive assy was swapped with 3 different units all giving same issue but when tested in another machine it worked 100%. I've been doing this long enough to know that i shouldn't trust that the next tech actually did what they say and that i should take their findings with a pinch of salt but this guy is a KM certified tech working on his own doing out of warranty/contract type jobs so should know a thing or two...

I'm hoping someone else had maybe come accross something like this. I couldn't remove the drive assy as the client was so happy to have their device printing after 8 months of being down... They've asked for a few days of usage before i start pulling parts again.

[blackcat4866]

Re: Konica Minolta Bizhub 658 - jams from tray 1, 2 and bypass

Firstly, congratulations on getting a used board with government encryption to work at all.

The J1102 is the typical code you'd see with flat spotted separation rollers, or other feed unit related issues. You might make sure that the page separation is near the default, or try some variations on the setting.

Same with J1201. Typically flat spotted separation rollers or one-way bearings.

If it were me, after a thorough look-over, if there wasn't something obvious I'd start with two sets of rollers and one-way bearings. Then run a sh*t-load of copies to see what exactly is happening.

In those situations that I find myself chasing my own tail, it's because I paid too much attention to what the previous tech(s) told me, and didn't use my own noggin. =^..^=

[allan]

Re: Konica Minolta Bizhub 658 - jams from tray 1, 2 and bypass

There is a set of one way bearings that gum up and fail that forms part of the paper feed drive. The result is that tray 2 and the bypass will jam if not replaced.
Worth inspecting and not to hard to get to.

[Rad01]

Re: Konica Minolta Bizhub 658 - jams from tray 1, 2 and bypass

Firstly, congratulations on getting a used board with government encryption to work at all.

The J1102 is the typical code you'd see with flat spotted separation rollers, or other feed unit related issues. You might make sure that the page separation is near the default, or try some variations on the setting.

Same with J1201. Typically flat spotted separation rollers or one-way bearings.

If it were me, after a thorough look-over, if there wasn't something obvious I'd start with two sets of rollers and one-way bearings. Then run a sh*t-load of copies to see what exactly is happening.

In those situations that I find myself chasing my own tail, it's because I paid too much attention to what the previous tech(s) told me, and didn't use my own noggin. =^..^=

Hi
Blackcat... Yeah was my suspicion when i got things running. Post was rather long n tried to get as much info but i neglected to mention was that the rollers were all new/pretty new-ish. initially scuffed the one ways on feed rails, tested and got same result. Tested again n could see the feed rollers barely move. Which then made me think along the lines of drive assembly.
I tend not to listen to what other techs say they did coz usually they'll tell you what you want to hear instead of just being honest and saying "hey bro, i didn't try checking that" or "sorry, i don't know how to do that" etc... I'll swing by there next week sometime when client's not too busy.
I've only heard/read about those drive assembly issues but never had one fail on me before. Other thing I haven't mentioned is that the meter is just under 300k so also odd that I'd have a failed drive assembly...

[Rad01]

Re: Konica Minolta Bizhub 658 - jams from tray 1, 2 and bypass

There is a set of one way bearings that gum up and fail that forms part of the paper feed drive. The result is that tray 2 and the bypass will jam if not replaced.
Worth inspecting and not to hard to get to.

Hey Allan... Yeah I've come accross this searching the site its something im going to check once back at client and didn't bother checking as itbwas said that 3 x drive assemblies were fitted and didn't resolve and those same assemblies worked in another devices but wouldn't work on this particular model.