Recent content by bengi3

the wiper blades after 20/30 years harden and no longer wipe the drum. all cartridges have bad wipers and even the replacement wipers are bad. and yes are coming to an end

It seems that all sources of wiper blades for the toner cartridges are old stock and it is impossible to fix. Also toner cartridges are old stock. Have all b/w laser Apple printers come to the end of their lifespan? Shall I get rid of my 12/640 and NTR?

Cannot get to print to this e260dn from Mac OS 9, while it is correctly seen by the same Mac when running OS X. In this specific case the Mac is a PowerBook G3. I installed the OS 9 printer software from the Lexmark site.

I am taking it apart, but to get into the rollers system is a nightmare

unfortunately with manual feed the sheet stops a mere 1 inch after, basically the same thing. The pickup roller works, it stall afterwards, will post a video tomorrow

This PLW12/640 receives the print queue, green led blinks regularly, gets the sheet but then stalls as if a second series of rollers isn’t activated. The sheet is indeed only partially picked up from the tray. Any suggestions ?

My last fix was for a PowerBook 180c: https://68kmla.org/bb/index.php?threads/powerbook-180c-a-very-aggressive-mold.35541/ polarizers film from alibaba. for the 9” PB180c I could use the sheet in diagonal, but for the bigger SVGA display of the PB5300ce I need to source the 45° sheets or bigger

When I discovered this defect on two of the best PowerBook in my basement I was shocked… Then, slowly I am fixing it. Here some pictures and some hints: https://www.ispezioneperugia.it/mac/start/lcd-vinegar-syndrome-fix/

Thank you, in the meanwhile I'll check the bunch of busted PB100 lcds, from vinegar to dead pixels…

no way, I tried to fix other two LCDs with the same defect (bottom half dead) and I can see that the driver connections are bad, so I guess its game over

Incidentally, what is the continuity scheme? 1-row1 to 1-row2 to 1-row3 to 1-row4 2-row1 to 2-row2 to 2-row3 to 2-row4 Etc… I noticed that pin 6-7-8 are continuous

I have several known good logic boards and use one of these for testing. I recapped lcd with tantalium caps, cleaned everything with isopropanol and passed the solder over the 12 row 4 pins. Result, half screen stil dead AND now blue screen of death… 👹

Ok, I can see that the mess is exactly on the other side of the PCB where the 8 caps are leaking. there’s still continuity between each pin of rows 1-2-3-4 and the corresponding pin. i.e. each row has 12 pins so I tested pin 1 of row 1 with pin 1 of row 2, then 3 and 4 etc... will recapping and...

ok, so I have to desolder and resolder all 4 row drivers? or just the last one? quite a challenge though. I have many busted lcd from PB100 so I can make some practice, but its really a challenge for me…

It’s a new purchase (a whole bunch of busted stuff) so I know nothing.