sound equipment does not turn on
Check if the source is delivering 3.3V
I sent you the diagram in case you don't have it
SA-AKX12 Diagram
making measurements, I made a short why I forgot to discard the filter. I had found the resistor R5720 of 22ohm open and I went to measure voltage in the diode D5731 And unintentionally made contact between that point and that of the C5713 and a burning smell came out that I feel bad for that childish error, before I had 10v on the pin 4 of the str now there are none .... what could have been burned?
no affection, I still have the 160v in the main filter, I measured continuity between pin 4 and 2 of the str and there is a short one, I took it out and it was fine, I measured the track and short mark ... I measured the D5732 and that is in short, I took it out and measured on the track and c was the short one .. now what data is that diode?
making measurements, I made a short why I forgot to discard the filter. I had found the resistor R5720 of 22ohm open and I went to measure voltage in the diode D5731 And unintentionally made contact between that point and that of the C5713 and a burning smell came out that I feel bad for that childish error, before I had 10v on the pin 4 of the str now there are none .... that could have been burned
Friend Lima to the tips of the captin, check the diode D5732 may be short and it may be that the STR is not damaged. The previous fault is at the source.
Ok now check that it is not short between the pin 4 of the STR and the negative pin of the C5724 (if there is short then the STR is damaged) but then place a 35v zener diode in D5732, and with Czech care.
Quiet friend you just solved the perch that you had. Disconnect pin 10 of connector CN5802 and see if the equipment turns on, do not connect the speakers and check what voltage is on pin 23 dl IC2003?
Good morning friend Evelio. I did the recommended thing and nothing that turns on on pin 23 there is 0.3 v ... friend a question do you know that I measure continuity of the katodo from the d5731 to the resistance 5722, does it mark continuity that the zener 5721 or that transistor q5720 are damaged?
Friend there should be no continuity (according to plan) check the elements D5721, Q5720 (CE) and DD722 and D5723. When disconnecting pin 10 of the CN5802 connector, did you do it with the source connected to the equipment or outside?
I mean 50 on the screen of the tester, take out the Q5720 and measure only between pin 1 and pin 2 .. I understand that it is a collector and base emitter, bone measures only between emitter and collector, measured D5721 and measures open. ... if when I disconnected pin 10 it was n with the board outside and without power, I had left it disconnected since yesterday and downloaded it
Friend connects the elements again and places the source in the equipment and takes the voltages with pin 10 disconnected and comments.
Friend the source without the pulse of power (micro) will not work for you. You only have the standby voltage 3.3v.
Connect the source to the equipment with pin 10 of the Cn5802 disconnected connector and power it, he says.
ok connect the source with the 10 pin desoldered, pin 23 measures 0.7v ... I turn it on and nothing ... why not turn on the stamby if it has 3.3v?
and according to the service manual the transistors that should have that voltage in stamby, there are stamby and ON voltages, check page 68 of the manual
Friend while they do not find the 3.3v on pin 23 as there are on pin 22 of IC2003 will not turn on the equipment. Friend places the jumper W5034 (bridge) on the card where the IC2003 goes, disconnects one of its sides and comments if the voltage rises on pin 23 of IC 2003.
Friend connects the display board should turn on the computer and comment to continue.
Quiet friend I've been busy in some homes. I check the diagram and see what to do.
good night friend evelio, excuse me that I had not responded is that I was in poor health, I commented that I made the measurements and they are the following
1. -35v * 2. -35v * 3. 0 * 4. 0 * 5. 35v * 6. 35v * 7. 2.1v * 8. 3.3v * 9. 0v * 10. 0v * 11. 0v * 12. 0v * 13. 16v * 14. 3.3v. checking I found that the card that goes to the display marked short in between its pins ... there I accommodated it and the radio turned on. I did all this with the W5034 (bridge) disconnected from one leg and pin 10 of the disconnected source board ... would it be that I connected everything again to see if it was the feeling that the fountain was knocking me out? Thanks in advance
I told you that the radio turned on all perfect friend Evelio, so in conclusion the fault was the R5720 of 22ohm and the flet that made bad contact ... of a true friend very grateful for your advice and patience, a pleasure to have worked with you, I hope you answer to close post
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