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joust

Member Since 02 Dec 2004
Offline Last Active Jul 02 2015 09:08 AM
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Posts I've Made

In Topic: Strange Fault On A Crown K1.

02 July 2015 - 09:11 AM

Depending on the age of the amp, it may need a full refurbishment. Yes, the ULOL adjustment should be verified and readjusted. Also, remove the output modules [by a qualified technician] and re-solder all suspicious connections. Remove the display board and also re-solder all connections. Basically, disassemble the amp and redo all suspicious connections!
Note : Looks like the amp is in Bridge mode; If the amp is in Bridge mode, the Ch2 volume knob will not work (review the manual). In Dual mode, both channel controls should work.

In Topic: Crown XTI 2000 not booting

26 June 2015 - 11:19 AM

The SMPS has only one [AC] reference : TP21. Beware! This is not a referenced Ground! This is considered the 'reference' to all SMPS primary voltages. In the Secondary section, the reference is 'ground'. DO NOT ground any electrical equipment TO THIS

Note : Across C201, there should be around 60K; If you have only 1,8K :
- Remove and measure C201 : If low, replace (.1uF, 50V); Re-install and power up; If booting up, finished!

If it doesn't power up :
- Remove R375 (1K); This will decouple the regulator circuit and re-measure across C201; If resistance is high : Issue with regulators;
- Power up and measure 16V; If voltage is low, verify U16 and FAULT circuit;

I hope this helps!

A

In Topic: Upgrading XTI 2000 to 4000

26 June 2015 - 09:54 AM

I don't think so. You may have to replace the power transformer and other devices to maker them compatible. It is possible that the controller may be different.
I wouldn't attempt it.

A.

In Topic: Crown XTI 2000 not booting

18 June 2015 - 11:42 AM

I doubt a software issue; However, as PL mentions, it could be firmware. As the unit powers up, the micro-controller should come alive and tries to enable the Soft Start and Doubler relays. If one of these two signals is not present, the unit won't complete the boot-up and may hang.

A.

In Topic: Crown XTI 2000 not booting

08 June 2015 - 07:43 AM

Check the small .1uF smt (C210, 198, etc) caps in the SMPS section, I've seen instances where the cap is out of tolerance.
Also verify (again!) the two relay circuits; If they don't enable, you won't have the correct bulk voltage and the smps won't engage properly.

A.