A960 Error 502
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Error Code 502 on a Dell™ A940 All-In-One Printer - KB Article - 120324 Article Summary: This article provides information on "Reposition the Encoder Strip on the A940 All-In-One Printer". Table of 502 bad gateway nginx Contents: Reposition the Encoder Strip on the A940 All-In-One Printer Issue
502 Bad Gateway Meaning
1. Reposition the Encoder Strip on the A940 All-In-One Printer To reposition the encoder strip, perform the 502 bad gateway fix following steps: Remove the power cord from the unit. Lift the lid of the unit, just below the scanner portion of the All-In-One, to expose the inside of
Please Explain This 502 Bad Gateway Error
the unit where the printer cartridges are located. Gently slide the ink cartridge carrier to the middle of the printer. Figure 1: Out-of-position encoder strip Gently move the top part of the printer belt to the right. Using your index finger, gently push encoder strip down and then back up to get it back into the slot 504 bad gateway located on the back of the ink cartridge carrier. Note: There is a small slot that the encoder strip fits into, which is located on the back of the ink cartridge carrier. While working with the encoder strip, check it for dust or any unclean spots. If any detected, try to clean the strip by wiping it gently with clean cloth. Gently press the strip first to the rear and then forward to ensure that it is seated correctly. Manually move the ink cartridge carrier to the left, then to the right to check the positioning of the encoder strip. Figure 2: Correctly seated encoder strip Note: If the encoder strip moves at all, it has NOT been repositioned correctly. Once the encoder strip has been re-seated, close the lid to the unit. Re-connect the power supply to the All-In-One. Press the Power button. If the encoder strip was re-seated correctly, the Hardware Error: 502 code will not appear. Quick Tips content is self-published by the Dell Support
This server received an invalid response from an upstream server it accessed to fulfil the request. This usually does not mean that the upstream server is down (no response to the gateway/proxy), but rather that the upstream server and the gateway/proxy do not
502 Proxy Error
agree on the protocol for exchanging data. Given that Internet protocols are quite clear, it often
502 Police Code
means that one or both machines have been incorrectly or incompletely programmed. Fixing 502 errors - general This problem is due to poor IP communication between 502 bad gateway nginx/1.4.6 (ubuntu) back-end computers, possibly including the Web server at the site you are trying to visit. Before analysing this problem, you should clear your browser cache completely. If you are surfing the Web and see this problem for all Web sites you try http://www.dell.com/support/article/us/en/19/SLN52269 to visit, then either 1) your ISP has a major equipment failure/overload or 2) there is something wrong with your internal Internet connection e.g. your firewall is not functioning correctly. In the first case, only your ISP can help you. In the second case, you need to fix whatever it is that is preventing you reaching the Internet. If you get this problem for only some of the Web sites you try to visit then it is likely to be a problem at those sites http://www.checkupdown.com/status/E502.html i.e. one of their pieces of equipment is failing/overloaded. Contact the people at those sites. Fixing 502 errors - CheckUpDown Our service monitors your site for HTTP errors like 502. Use of proxies and caching is increasing on the Web. Our CheckUpDown robot will always try to "drill through" to the real computer that actually hosts the Web site, but we do not have complete control over where our HTTP request actually ends up. If only one link in the chain of computers dealing with our HTTP request is broken, then an error such as 502 can easily occur. Please contact us (email preferred) whenever you encounter 502 errors - there is nothing you can do to sort them out. We then have to liaise with your ISP and the vendor of the Web server software so that they can review the flow of IP data traffic between various computers under their control. 502 errors in the HTTP cycle Any client (e.g. your Web browser or our CheckUpDown robot) goes through the following cycle when it communicates with the Web server: Obtain an IP address from the IP name of the site (the site URL without the leading 'http://'). This lookup (conversion of IP name to IP address) is provided by domain name servers (DNSs). Open an IP socket connection to that IP address. Write an HTTP data stream through that socket. Receive an HTTP data stream back from the Web server in response. This data stream contains status codes whose
Owner's manual Dell A960 Owner's Manual Page 79 Dell printer owner's manual. Hide thumbs Also See for A960 Specification - 4 pages 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 http://www.manualslib.com/manual/36987/Dell-A960.html?page=79 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 bad gateway 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 Hardware Error: 0402 The printer has a paper jam in the ADF. See "Document Misfeeds or Jams" on page 77 to clear the jam. Hardware Error: 401 The printer scanner is stalled. Press Power to turn your printer off. 1 Unplug your printer. 2 Make sure the scanner is unlocked. 3 Plug in your printer. 4 Press Power to turn your printer on. 502 bad gateway 5 Cartridge Error: 50C Your ink cartridge has a short. Press Power to turn your printer off. 1 Unplug your printer. 2 Plug in your printer. 3 Turn your printer on. 4 Uninstall and reinstall the cartridges. 5 NOTE: If this does not resolve the problem, see "More Troubleshooting Options" on page 82 or replace your cartridges. Hardware Error: 502 The printer is stalled. Press Power to turn your printer off. 1 Unplug your printer. 2 Check for paper jams. 3 Plug in your printer. 4 Press Power to turn your printer on. 5 79 Troubleshooting Previous page Next page 1...757677787980818283 Also See for Dell A960 Dell Printer A920 Specification 4 pages Related Manuals for Dell A960 All in One Printer Dell A960 All In One Personal Printer Notice User's guide (96 pages) Printer Dell 3000cn Color Laser Printer User Manual Color laser printer (195 pages) Printer Dell 3100cn Owner's Manual Dell inc. owner manual laser printer 3100cn (90 pages) Related Products for Dell A960 Dell Vostro A90 Dell AY511 This manual also for: A960 all in one personal printer Comments to this Manuals Your Name Enter your comment: Symbols: 0 Enter text from picture: Write a comment Latest comments: × Bookmark × Please, turn your attention By pressing 'print' button you will print only current page. To print the manual completely, please, download it. Don't show me this message again. Got it, continue to print 201