|
|
Post by 24century on Jun 23, 2016 19:48:53 GMT -5
R502, R511, R512 all open, bought those from local store today and soldiered on, but still not turn on like a rock, double checked SMPS Assy that still has the 5.6 output, damn
|
|
|
|
Post by mastertech on Jun 23, 2016 20:11:46 GMT -5
No sure what procedure you are using but try this. Plug in receiver and press and hold the "tune down arrow" and "multi-zone on/off" buttons at the same time and hold them for at least 5 seconds and see if it comes on while holding.
|
|
|
|
Post by 24century on Jun 23, 2016 20:20:46 GMT -5
no reaction, at all.
That was the action I did 1st time when refuse to power on, I did those buttons and it comes out with a light smoke, I might destroyed some other related components from 2 weeks ago, any other checkpoint?
|
|
|
|
Post by mastertech on Jun 23, 2016 20:27:33 GMT -5
It smoked just now when you tried it?
|
|
|
|
Post by 24century on Jun 23, 2016 21:01:40 GMT -5
no, it didn't, died like a rock with no reaction, smoke happened 2 weeks ago, was follow forum repairalmostanything.com/thread/55/pioneer-1122-dead-turn-fixed
|
|
|
|
Post by mastertech on Jun 23, 2016 21:40:12 GMT -5
You said you still have 5.6v standby voltage from power supply. I'm guessing you are checking that at connector CX101 on the power supply. Check it again and if it is still there then test pin 1 of that connector also and see if there is any voltage on it. Try pressing the power button also when testing that pin.
|
|
|
|
Post by 24century on Jun 23, 2016 22:05:14 GMT -5
You said you still have 5.6v standby voltage from power supply. I'm guessing you are checking that at connector CX101 on the power supply. Check it again and if it is still there then test pin 1 of that connector also and see if there is any voltage on it. Try pressing the power button also when testing that pin. getting dark, will try Sat morning |
|
|
|
Post by 24century on Jun 24, 2016 9:15:40 GMT -5
got up early today, CX101 is the one, Pin 1 doesn't has any voltage output, that's causing no power, what's the troubleshoot step I should take from here?
|
|
|
|
Post by mastertech on Jun 24, 2016 9:49:27 GMT -5
Are you able to do testing on the front board, on ic3004 with the unit powered? You would probably have to remove the front of the unit but keep it connected. Hopefully ic3004 is on the side facing out.
|
|
|
|
Post by 24century on Jun 24, 2016 18:26:08 GMT -5
  Per disassembly guide from the sm, it looks assessable, will double confirm when get home, what pins am I looking at? |
|
|
|
Post by mastertech on Jun 24, 2016 19:42:55 GMT -5
First let me suggest a few things. If you have a power strip with an on/off switch you may want to use it. This way you can get your probe where you want it and then turn on the power, get your reading and then turn it off. Less chance of your probe slipping and shorting something out.
Also, make sure your probe tip is nice and sharp pointed, even if you have to file it. Again,less chance of slippage.
When you are ready, test pin 58 for +5v. If you have the +5v, hold your probe there and push the power button and see if the voltage drops to near zero while holding the button down. Let me know what you get.
|
|
|
|
Post by 24century on Jun 25, 2016 18:21:25 GMT -5
Did bypass the SMPS board, start with a little clipping sound, hard to clear reach Pin 58.
Went ahead start the unit, a light smoke comes around SBL and SBR area from AMP board, looks like there are still issues with the AMP board, will disassemble it again and do those points you as center channel, does that logic sound right?
|
|
|
|
Post by 24century on Jun 25, 2016 20:05:42 GMT -5
I mean bypass the relay per previous post, SMPS is still on
|
|
|
|
Post by mastertech on Jun 27, 2016 10:19:31 GMT -5
No reason not to investigate smoke.
|
|
|
|
Post by 24century on Jul 11, 2016 13:04:24 GMT -5
Surround Right is where the smoke came from, finally get some time start to work on the unit again, and find the burned resisters, as well as the transistors, haven't get time reassemble it back, will post back the result once dome   |
|
