xti 4000 faultyxti 4000
Posted 25 April 2014 - 02:00 PM
Posted 25 April 2014 - 04:10 PM
The first XTI seems to have hanged right in the middle of booting up!
Open the top cover and locate what we call the 'heartbeat' monitor LED (E1). It is located just next to U1 and above Y1 (the oscillator). Disconnect the display board from the main board. Now, power up : The heartbeat monitor should light up, you can now hear a few realys clicking and after a few more seconds the led monitor should now start to blink at a 1 Hz rate. When it starts blinking, the display board should be normal.
To determine if the display board is at fault, another test that you can do is to swap the display module from the other problematic amp and see how it responds.
As for the other XTI4000,go back and follow a few of my postings in regards to XTI repairs. You'll find enough information there to evaluate quite comfortably the issue with the amp!
If you need further information, I'll be there to help you out.
Have a great week-end!
Posted 03 May 2014 - 05:41 PM
Posted 04 May 2014 - 11:11 AM
Posted 07 May 2014 - 12:05 PM
Posted 07 May 2014 - 03:38 PM
Posted 07 May 2014 - 05:37 PM
Posted 08 May 2014 - 04:21 PM
Posted 09 May 2014 - 10:55 AM
I would suggest to investigate, locate and remove any faulty or probable cause component. Don't install any new component now!
Verify and replace any faulty Tracker module : I suggest to purchase the Tracker module; Don't attempt to repair them : The Silpad is not available. The Tracker is not that expensive;
Verify and replace any faulty output device with heatsink; You could try to replace individual defective devices : Though, the two part heatsink is difficult to put back together;
Verify and replace any faulty driver;
Verify and replace any faulty diode string : Re-install new diodes now;
Verify and replace any faulty bias transistor Reinstall new bias trans. now;
Verify and replace open R146 or 246 : Re-install now;
Install new components;
Verify the left hand cover screw : If the screw aligns and makes contact with the Ch2 heatsink, I would recommend to replace the current screw by a shorter screw.
Power up. It should power up normally. If not, verify the SMPS.
Hope this helps!
Posted 09 May 2014 - 03:10 PM
Posted 09 May 2014 - 03:56 PM