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This Epson RX520, RX530, CX7700, CX7800, PMA750 Service Manual abd Parts List describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of the printer.

This manual consists of 6 chapters and Appendix.

CHAPTER 1. PRODUCT DESCRIPTIONS
Provides a general overview and specifications of the product.

CHAPTER 2. OPERATION PRINCIPLES
Describes the theory of electrical and mechanical operations of the product.

CHAPTER 3. TROUBLESHOOTING
Describes the step-by-step procedures for the troubleshooting.

CHAPTER 4. DISASSEMBLY / ASSEMBLY
Describes the step-by-step procedures for disassembling and assembling the product.

CHAPTER 5. ADJUSTMENT
Provides Epson-approved methods for adjustment.

CHAPTER 6. MAINTENANCE
Provides preventive maintenance procedures and the lists of Epson-approved lubricants and adhesives required for servicing the product.

APPENDIX Provides the following additional information for reference:
• Electrical circuit boards schematics
• Parts List

FORMAT: High resolution PDF document!

Zip archive: 13 684 kB PdF document 15 308 kB

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We are in business since 2002 and do our best to give our customers perfect service!

Our customers reviews:

Mary Jon Mary Jon	2009-08-07 14:55:10
thanks for your help, i have got the manual now, its is a great service you offer

alejandro carrillo	2009-05-08 21:22:35
me pueden ayudar con el reset de CX7700, CX7800 Service

reza reza	2007-10-16 07:09:47
i am reza im luck have program printer epson cx3900 thans

Kristal Serna	2024-09-16 20:30:45
It's really easy to use and has saved me tons of money over buying new printers. I've reset my current printers several times and have used them for over 5 years thanks to these reset keys.

Alan Perelman	2010-09-03 12:48:07
I am well pleased with your product and will recommend it to as many as possible...

GENNA SHOES	2025-06-14 11:16:01
ho ordinato 1 codice online, il codice è arrivato subito tramite mail, l'ho applicato alla mia epson et-4700, ho spento e riacceso la stampante ed ora il contatore segna 0%, ottimo!!! Grazie!!!

ann weston

2022-09-01 07:15:35

I bought one reset key and it hasn't even been a month yet and my printer is already telling me that the ink pad needs service. All of these good reviews that I have read on here is the reason i took a chance and purchased a reset key. I have not been able to use my printer at all. I am highly pissed off that not even a month after purchasing the one reset key and my printer is back at it again. I want a refund or to be able to try another reset code. this is a bunch of B.S. REPLY: Waste counters doesn't have any relation to how much time did user used the printer. Waste counters increase when printhead cleaning is performed. One printhead cleaning takes about 3-4% of waste counter. So if user make 25-30 printhead cleanings - the waste ink counters will reach 100% and overflow. Doesn't depend on time you will make this cleanings - in 1 month or in 1 year or in 1 day or in 3 years. Usually when printer is new and using Epson original inks - -there will be no need to make printhead cleanings. After Epson inks finish - users often buy third party inks - they have not so good quality as Epson and may clog printhead more often. So after Epson inks finish - users make printhead cleanings more often - as a result - after 20-30 printhead cleanings - counters overflow. So - try to make printhead cleanings less often. Only ONE thing what does Reset Key - it resets waste ink pads counters to ZERO. Doesn't matter counters will be reset by yourself using Reset key ($9.99) or by Epson Service Center engineer ($50) - the result will be the same - counters will become 0% Conclusion: use high quality inks!

Graham Simpson	2011-10-01 11:31:16
I have three Epson R290 Printers and this is the second one i have had to reset. Your system is the best by far and for $9.99 you can't say no. Yes i was able to purchase the waste pads from a place for only $5.00 so now I should be able to keep on printing. Thanks again guys well done.

safuan samad

2018-07-17 20:59:31

Your printers are pieces of shit, I'm sure that HP will be happy to know they have even more customers. The firmware is a piece of shit, the software isn't good either. And as for the support team, well lets just say that their not even worth anything, as any complications I have had(and others) haven't had any help from them. So you can thank yourselves for the loss, and give a big round of applause to any companies your in competition with.

Jhazmin Raya

2020-08-18 20:35:17

I have modified the firmware of an Epson wf3620 with the firmware key to make the printer run with chipless ink cartridges. The instructions were clear but must be followed exactly in order for the process to be successful. I am very happy with the result as I have the freedom to use oem ink or not depending on my needs. No oem cartridges now work perfectly well. Well done wic utility people. regds, Peter.