my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Digital Cinema Forum   » USL JSD-100 stuck in bypass

Author Topic: USL JSD-100 stuck in bypass Magnus Eriksson Expert Film Handler Posts: 121 From: Stockholm, Hägersten, Sweden Registered: Jan 2011 posted 06-30-2018 02:34 PM                     After replacing some power amps and rewiring the rack a bad thing happened. I powered everything up. First JSD-100 and then the amps one by one. Then generating pink noise from JSD-100 and gently turn up the amps, all channels sounded OK. A quick walk around the auditorium with nothing playing to listen for hum and other inaccuracies (this was a mix of old balanced and unbalanced amps), nothing from the speakers that caught my ear. When preparing my D2 a loud speaker pop came from the autitorium. No good. After carefully yanking all cables and connections more noise occured when I reached the wiring around the JSD-100. The power cord in the JSD-100 wasn't properly seated! Sloppy work, but no one to blame but me. OK, good, let´s go to work I thought. But no. Pink noise from JSD-100 now sounded garbeled and distorted. After a cold restart of the JSD-100 it was stuck in bypass. I tried to replace the power supply (i had a ECI-60 in my car, same supply) but no luck. Any ideas here? /M.E.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 06-30-2018 03:40 PM                     Have had zero failures of any JSD-100's and over 250 installed. The remainder were JSD-60 of which I have had one failure. Mark  |  IP: Logged Harold Hallikainen Jedi Master Film Handler Posts: 906 From: Denver, CO, USA Registered: Aug 2009 posted 06-30-2018 03:45 PM                        Sorry to hear about the issue! The JSD-100 powers up in bypass, then switches out of bypass when hardware initialization is complete. If that does not complete, the unit stays in bypass. I'm assuming you see an indication of bypass on the front panel (flashing bypass LED). It's possible that the momentary power interruption resulted in corrupted flash memory in the microcontroller. The firmware has to go through a fairly complex sequence to write to flash, so it SHOULD not happen by accident. But, accidents happen. I suggest seeing if you can restore the factory firmware. Do this by turning off the power, then holding down the Digital 16 and User 2 buttons. Keep holding the buttons down, and turn on the power. The front panel LEDs should start flashing. Release the buttons once the LEDs are flashing. When the LEDs stop flashing, the microntroller should reset and start operating with the original firmware. If that works, you should be able to connect to the unit and, if needed, update to the current firmware. See the restore instructions at http://ftp.uslinc.com/ftp/Products/JSD-100/Manual/JSD-100Manual120510.pdf#page=58 . The latest firmware is at http://ftp.uslinc.com/?dir=ftp/Products/JSD-100/Software/Firmware/CurrentRelease/Jsd100ECO5767 . Good luck! Harold  |  IP: Logged Magnus Eriksson Expert Film Handler Posts: 121 From: Stockholm, Hägersten, Sweden Registered: Jan 2011 posted 06-30-2018 03:55 PM                     quote: Mark Gulbrandsen Have had zero failures of any JSD-100's I can trade you a faulty one. Just give me one of the 250 and we are even @Harold: thanks for the advice, I will try that tomorrow. And this was not an ordinary job at some boring shopping mall multiplex. It was me just trying to be a nice guy helping an art house cinema out for free on my spare time. /M.E. Sitting with a CP65/ECI-60 on the kitchen table a saturday night  |  IP: Logged Kenneth Wuepper Phenomenal Film Handler Posts: 1026 From: Saginaw, MI, USA Registered: Feb 2002 posted 06-30-2018 04:03 PM                     As we all know, "No good deed goes unpunished!"  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 06-30-2018 04:15 PM                     quote: Mark Gulbrandsen Have had zero failures of any JSD-100's and over 250 installed. The remainder were JSD-60 of which I have had one failure. Talk about completely worthless information (true or not). The man had a problem and you offer NOTHING to help.  |  IP: Logged Magnus Eriksson Expert Film Handler Posts: 121 From: Stockholm, Hägersten, Sweden Registered: Jan 2011 posted 07-01-2018 06:16 AM                     No luck I'm afraid. The bypass LED starts flashing 1-2 seconds after powerup. Holding buttons 4 + 6 doesn't change that behaviour. CP65 until further notice then :-( At least there are no PIC:s or hex files in that unit. Only dead flies. /M.E.  |  IP: Logged Harold Hallikainen Jedi Master Film Handler Posts: 906 From: Denver, CO, USA Registered: Aug 2009 posted 07-01-2018 11:30 AM                        Sorry to hear that did not work! Sounds like a hardware failure. You can contact tech support at CinemaTechSupport@qsc.com . Harold  |  IP: Logged Magnus Eriksson Expert Film Handler Posts: 121 From: Stockholm, Hägersten, Sweden Registered: Jan 2011 posted 07-03-2018 06:26 PM                     Well, this is how it looks for now. Let's hope the JSD-100 gets back after treatment at Harold's place. At least I can repair this old friend with my bare hands if it breaks down. Or get another one from the attic. /M.E.  |  IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.