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Other diagnosis methods for a head unit
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<blockquote data-quote="Lasherž" data-source="post: 8709578" data-attributes="member: 679555"><p>Just curious before I give a friend of a friend some bad news about their head unit.</p><p></p><p>It's a Dual head unit that's dual dimm (Model XDVD269BT). I took it home so it's not hooked up to a car, but they said a previous technician said it wasn't getting ignition. I soldered and shrinkwrapped all of the connections and then hooked it up to a variable DC power supply. + to bat+ and ignition and - to ground. This unit doesn't have any fancy ECU turn on like some volkswagens. When it powers up (12.8v) it goes from .015A to .4A and makes a sound presumably to check if there's a disk inside, but no display. The Bluetooth is working, but no display no matter what I do. I can try to get it to play music, but there's no point if there's no display. What do you installers do when you don't get a display but the unit is pulling operating voltage and current? Is there another wire I need to short to positive like illumination?</p><p></p><p>Feel like it's pretty obvious but I'd like to be sure before I agree with the other technician who left it in bad shape and tell them they've wasted a week chasing the issue.</p></blockquote><p></p>
[QUOTE="Lasherž, post: 8709578, member: 679555"] Just curious before I give a friend of a friend some bad news about their head unit. It's a Dual head unit that's dual dimm (Model XDVD269BT). I took it home so it's not hooked up to a car, but they said a previous technician said it wasn't getting ignition. I soldered and shrinkwrapped all of the connections and then hooked it up to a variable DC power supply. + to bat+ and ignition and - to ground. This unit doesn't have any fancy ECU turn on like some volkswagens. When it powers up (12.8v) it goes from .015A to .4A and makes a sound presumably to check if there's a disk inside, but no display. The Bluetooth is working, but no display no matter what I do. I can try to get it to play music, but there's no point if there's no display. What do you installers do when you don't get a display but the unit is pulling operating voltage and current? Is there another wire I need to short to positive like illumination? Feel like it's pretty obvious but I'd like to be sure before I agree with the other technician who left it in bad shape and tell them they've wasted a week chasing the issue. [/QUOTE]
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Other diagnosis methods for a head unit
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