|
|
Post by mastertech on Aug 30, 2013 19:41:52 GMT -5
Where were you testing S12 and MG? On the back of the board with the fuse on it?
|
|
|
|
Post by Michael on Aug 30, 2013 19:43:41 GMT -5
Yes!
|
|
|
|
Post by Michael on Aug 30, 2013 19:47:59 GMT -5
MG to S12 on the upper board and on the back of the lower board, I get 16.87 V.
|
|
|
|
Post by mastertech on Aug 30, 2013 19:48:50 GMT -5
Is that what you are getting now?
|
|
|
|
Post by Michael on Aug 30, 2013 19:49:48 GMT -5
Yes.
|
|
|
|
Post by mastertech on Aug 30, 2013 19:51:53 GMT -5
Oh, Well then it's ok. There was a point a while back where you said you did not have the voltage.
Try this then. Plug it in and hit the power button and see if the display lights up.
|
|
|
|
Post by Michael on Aug 30, 2013 19:54:47 GMT -5
Yeaaaah!!! Display lights up for a second and goes out!!!
|
|
|
|
Post by mastertech on Aug 30, 2013 19:59:46 GMT -5
Well partly good. I would think it should of stayed on. Disconnect that red and blue wire from the amp board but make sure no ends touch anything. Tape if necessary. The try plugging in and hitting power button again and see if it stays on.
|
|
|
|
Post by Michael on Aug 30, 2013 20:01:57 GMT -5
It's the same... With or without them connected.
|
|
|
|
Post by mastertech on Aug 30, 2013 20:16:58 GMT -5
When you hit the power button do you hear the speaker relays click after about 4 seconds? How many seconds after the display lights before it then goes off?
|
|
|
|
Post by Michael on Aug 30, 2013 20:18:53 GMT -5
No click anywhere... After less than a second it goes off.
|
|
|
|
Post by mastertech on Aug 30, 2013 20:22:19 GMT -5
So it just lights up and then goes right off.
|
|
|
|
Post by Michael on Aug 30, 2013 20:24:08 GMT -5
Yes.
|
|
|
|
Post by mastertech on Aug 30, 2013 20:37:06 GMT -5
Ok. I'm going to give you 1 more test to do for tonight cause I have to go. So do this test and I'll check your results tomorrow.
This test you have to do very carefully because the receiver will be plugged in while your testing. DMM will be on DC voltage.
Take your negative probe of your DMM and clip it to the chassis (metal frame) somewhere, probably on the back panel somewhere. All your testing will now be with the positive probe.
Go to the regulator board and notice the pins on the back of the board where that non solder connector wire harness is. There are 9 pins. With the receiver plugged in you are going to test for voltage on the pins I tell you to. This is where you have to be very careful. If you slip with your probe you can blow out parts. Rest you hand on the top of the front panel and gently touch the tip of each pin. TAKE YOUR TIME!
Facing the front of the receiver from left to right I am going to give you the pin number and what the voltage should be. You should have voltage even if it turns itself off, as long as it is plugged in.
Ok, here is the pin and voltage list. Any pin number I don't give means it's a ground so don't bother testing it.
Pin 1= +12v
Pin 3= -12v
Pin 4= +1.3v
Pin 5,6,7= +5v
Pin 9= -5v
|
|
|
|
Post by Michael on Aug 30, 2013 21:03:37 GMT -5
Here is my readings;
Pin 1= - 0.638 V
Pin 3= - 11.96 V
Pin 4= 0.508 B
Pin 5, 6,7 = 5.05 V - 5.07 V
Pin 9 = - 4.90 V
I'm sure of these readings since I did it couple of times. Also sure of the PIN numbers since PIN number 1 I s marked on the back of the board at CB 353.
We will continue tomorrow. Thank you and enjoy your Friday evening...
|
|
