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Post by mmartell on Jan 19, 2022 13:45:09 GMT -5
The FLAGS0 line is switching too fast for my meter. I only see pulses of up to about 0.8v most of them less.
Edit: That's on TP1, the DSP side of R7923
Edit2: I'm in stereo, not Direct or Pure Direct mode.
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Post by mmartell on Jan 19, 2022 13:59:59 GMT -5
I'm seeing the exact same thing at pin73 of the mcu (FLAGS0).
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Post by mmartell on Jan 19, 2022 14:08:51 GMT -5
Same for the DSP_RST line at pin72 of the mcu. It goes high (3.3v) after power on and seems to pulse lower several times by milivolts before becoming rock steady after around 10 seconds.
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Post by mmartell on Jan 19, 2022 14:14:25 GMT -5
Inconclusive. Will try with my scope but might need help with that.
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Post by mastertech on Jan 19, 2022 14:21:01 GMT -5
Same for the DSP_RST line at pin72 of the mcu. It goes high (3.3v) after power on and seems to pulse lower several times by milivolts before becoming rock steady after around 10 seconds. What is the steady voltage, 3.3v? |
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Post by mmartell on Jan 19, 2022 14:36:41 GMT -5
Yes 3.3v
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Post by mastertech on Jan 19, 2022 14:57:25 GMT -5
I am going to give you a couple things now to speed this along.
Have you verified the 1.1v and 3.3v lines to the DSP?
Remove R7923 and retest voltage on startup at FLAG0 pins of CPU and DSP.
Leave resistor out and run diagnostics to see if error changed.
Test for 3.3v at TP2.
Remove R7954 and run diagnostics again.
Remove R7922 and run diagnostics again.
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Post by mmartell on Jan 19, 2022 15:15:24 GMT -5
Well that should keep me busy since many of those are under the board I believe  Thanks for the suggestions and will report back. |
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Post by mmartell on Jan 19, 2022 16:27:22 GMT -5
Here's what I have so far... 1.1v and 3.3v verified at the DSP. With R7923 removed I now have 0v at the mcu in standby and on. At TP1 I have 1.35v in standby and 3.3v when powered on. (  ?) Diagnostics now indicate FIRM ERROR with ^DSP 00.00 and ALSO ^GUI 00.00 ! ( ?) Have not yet removed the other resistors let me know first if you think this indicates something as I have a few things to take care of before I can get back to this. |
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Post by mastertech on Jan 19, 2022 16:45:08 GMT -5
Ok, before removing the other resistors, with receiver unplugged, do an ohm test on the DSP ic between pins 133, 134 and 135 and see what you get.
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Post by mastertech on Jan 19, 2022 16:54:11 GMT -5
Which X1000 version is you unit, E1c, E2 or E3?
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Post by mmartell on Jan 19, 2022 17:27:54 GMT -5
Which X1000 version is you unit, E1c, E2 or E3? E3 |
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Post by mmartell on Jan 19, 2022 18:12:33 GMT -5
Ok, before removing the other resistors, with receiver unplugged, do an ohm test on the DSP ic between pins 133, 134 and 135 and see what you get. Pin 133-134, 10mega ohm Pin 133-135, 18k ohm
Pin 134-135, 10mega ohm
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Post by mastertech on Jan 19, 2022 18:16:06 GMT -5
Now on MCU, ohm test between pins 73, 74 and 76.
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Post by mmartell on Jan 19, 2022 19:23:37 GMT -5
Now on MCU, ohm test between pins 73, 74 and 76. Pin 73-74, 244k ohm Pin 73-76, 10k ohm Pin 74-76, 205k ohm The first and last readings started high, went low then rose until they settled roughly where indicated. |
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Thanks for the suggestions and will report back. 
?)
