Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > Troubleshooting Power Supplies and Power Supply Design
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 01-09-2022, 01:25 PM   #21
sam_sam_sam
Badcaps Veteran
 
Join Date: Jul 2011
City & State: Some times Sunny Jacksonville FL
My Country: USA
Line Voltage: 120 Volts 60 HZ
I'm a: Knowledge Seeker
Posts: 3,656
Default Re: Need some help with Epson Printer Power Supply C655 MAIN

Quote:
Originally Posted by UglyBetty View Post
Just for the heck of it, I ordered some transistors to see if I can screw up this board even more! This should be fun! Stay tuned....
Oh now you want to see factory smoke come out of the device this should be fun to watch or hear about

Just in case things go horribly wrong can you still get a new switching power supply for this printer or do you have to buy a new printer
__________________
9 PC LCD Monitor
6 LCD Flat Screen TV
30 Desk Top Switching Power Supply
10 Battery Charger Switching Power Supply for Power Tool
6 18v Lithium Battery Power Boards for Tool Battery Packs
1 XBox 360 Switching Power Supply and M Board
25 Servo Drives 220/460 3 Phase
6 De-soldering Station Switching Power Supply 1 Power Supply
1 Dell Mother Board
15 Computer Power Supply
1 HP Printer Supply & Control Board * lighting finished it *


These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
2 Hem Saw Computer Stack Board

All of these had CAPs POOF
All of the mosfet that are taken out by bad caps
sam_sam_sam is offline   Reply With Quote
Old 01-09-2022, 04:11 PM   #22
CapLeaker
Leaking Member
 
CapLeaker's Avatar
 
Join Date: Dec 2014
City & State: Atlantic Canada
My Country: Canada
Line Voltage: Ground, 0Hz
I'm a: Hobbyist Tech
Posts: 5,219
Default Re: Need some help with Epson Printer Power Supply C655 MAIN

Check your printer head first for a short.
CapLeaker is offline   Reply With Quote
Old 01-09-2022, 04:37 PM   #23
UglyBetty
Member
 
Join Date: Jan 2022
City & State: Edmond, Oklahom
My Country: USA
I'm a: Knowledge Seeker
Posts: 20
Default Re: Need some help with Epson Printer Power Supply C655 MAIN

CapLeaker,
I traced the schematic back from the +42v connection to the printhead. I was not able to find a schematic for the printhead itself, but did determine which connection was the input for the +42v. I ohmed from that point to the remaining pins and did not find anything close to a short. Again, I'm wondering if the printhead was not still wet from the cleaning process when it stopped working. Now the head has time to dry out completely. All I can do it try it. Ya know?

Sam_sam_sam

The problem ended up not being in the power supply (the best I can tell). I'm not going to give up on this printer yet. Parts seem to be pretty cheap if your willing to wait for them from China, Japan or Taiwan. I have ordered a used, but good, main board and used but good printhead from a reputable dealer on ebay.

I also ordered two sets of transistors from another China seller on there. All of these parts cost me right at $100 shipped. To replace this printer would be $800-1,000 so I'm hedging my bets I can get it working.
There are several reasons. One I absolutely love this printer. It prints better than my fathers $5,000 Canon. Two, I have about $500 worth of genuine ink cartridges for this printer that I do not want to go to waste. IF it can be repaired, it's one less item to go into the land fill.
If I learn enough, I may buy up some other "non working" printers like this, repair them and make back the money I spent on this one.
Besides, I love to tinker. I am always working on something. It's just something I like to do.
UglyBetty is offline   Reply With Quote
Old 01-12-2022, 07:11 PM   #24
UglyBetty
Member
 
Join Date: Jan 2022
City & State: Edmond, Oklahom
My Country: USA
I'm a: Knowledge Seeker
Posts: 20
Default Re: Need some help with Epson Printer Power Supply C655 MAIN

Waiting on parts. When I get them, I'll update this thread more.
Estimated delivery date 1/21 - 2/4........

UglyBetty is offline   Reply With Quote
Old 03-21-2022, 04:44 AM   #25
netsecrets00
New Member
 
Join Date: Oct 2014
City & State: Pune
My Country: India
Line Voltage: 250V 50hZ
I'm a: Knowledge Seeker
Posts: 6
Default Re: Need some help with Epson Printer Power Supply C655 MAIN

Quote:
Originally Posted by UglyBetty View Post
Waiting on parts. When I get them, I'll update this thread more.
Estimated delivery date 1/21 - 2/4........

Any Updates ??
netsecrets00 is offline   Reply With Quote
Old 03-21-2022, 02:13 PM   #26
sam_sam_sam
Badcaps Veteran
 
Join Date: Jul 2011
City & State: Some times Sunny Jacksonville FL
My Country: USA
Line Voltage: 120 Volts 60 HZ
I'm a: Knowledge Seeker
Posts: 3,656
Default Re: Need some help with Epson Printer Power Supply C655 MAIN

I second this any updates
sam_sam_sam is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums 2003 - 2022
Powered by vBulletin ®
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 12:59 PM.
Did you find this forum helpful?