Re: No trace
Posted: Sat Feb 04, 2017 7:41 am
Done, many times.
JYE Tech Forum
No trace
Page 2 of 4
Re: No trace
Posted: Sun Feb 05, 2017 6:27 pm
Did not help. No changes.
Re: No trace
Posted: Wed Feb 08, 2017 10:43 pm
In manual, Step 1 "Check the main board" ( switch on without Analog Board ). Be careful - power supply must be good ( Vin filter capacitor 100 uF on analog board now disconnected, so I burned my device 
). Must be a noise on the screen. If still a line - problem in processor board. Check shorts from signal line to GND and 3.3V ... If the CPU or ( and ) 1117 is heating, or 3.3V less than 3.3V - a bad sign...
). Must be a noise on the screen. If still a line - problem in processor board. Check shorts from signal line to GND and 3.3V ... If the CPU or ( and ) 1117 is heating, or 3.3V less than 3.3V - a bad sign...Re: No trace
Posted: Thu Feb 09, 2017 3:48 pm
CPU And 1117 not much heat.
U+: 3.24
Re: No trace
Posted: Thu Feb 09, 2017 4:20 pm
I can follow the signals from input all way to cpu. So it must be the logic board that i bad.
Re: No trace
Posted: Fri Feb 10, 2017 4:03 am
when you do VPos alignment please make sure analog board is connected and couple switch is set to GND. It won't make sense if VPos alignment is done without the analog board attached.
Re: No trace
Posted: Fri Feb 10, 2017 4:05 pm
You should read the post first 
the shell does not respond to the ADC switch.
the shell does not respond to the ADC switch.Re: No trace
Posted: Fri Feb 10, 2017 6:17 pm
That's right. ADC switch does not respond.
Re: No trace
Posted: Sat Feb 11, 2017 1:34 am
try to check resistance on the analogue bord between the 2 points in the picture (disconnected from the main bord, multimeter on 200k).
supposed to be: 1k-11k-21k when you change the adc switch.
if not then check R23, R24, R25 (on the Analogue Bord).
supposed to be: 1k-11k-21k when you change the adc switch.
if not then check R23, R24, R25 (on the Analogue Bord).
Re: No trace
Posted: Sat Feb 11, 2017 5:08 am
Sorry I'm a little confused. Let's clarify.
1 ) By "ADC switch" it actually means the couple switch, right? This switch select AC, DC, or GND.
2 ) By not response did you mean you didn't see the couple display change when you move the switch? or the display changed but no effect to signal.
3 ) Did swed's board and DanilinSA's board behave the same in the issue?
1 ) By "ADC switch" it actually means the couple switch, right? This switch select AC, DC, or GND.
2 ) By not response did you mean you didn't see the couple display change when you move the switch? or the display changed but no effect to signal.
3 ) Did swed's board and DanilinSA's board behave the same in the issue?