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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Wed Dec 17, 2014 11:42 pm Post subject: |
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You can use a free hosing site to upload to and then put link here. Photo bucket or image shack works well.
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Dec 18, 2014 1:18 am Post subject: |
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Dec 18, 2014 1:18 am Post subject: |
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Give me a little time to work this up.
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Thu Dec 18, 2014 1:29 am Post subject: |
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sure
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Dec 18, 2014 2:28 am Post subject: |
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Ok. Below is your main board which is the bottom one in your receiver. Remember, now, when you plug in your receiver, everything is powered up so be careful when you are probing for voltages. If anything in this picture is unclear, let me know and I can give you a blown up one. I did it this way so you can find the connectors more easily.
Don't use chassis for ground. Use the gnd in each connector you are testing for the neg probe. Set DMM on DC voltage and plug in receiver.
CN3, pins 2 and 8, using 8 for neg, should be @ +45 to +65
CN3, pins 5 and 8, using 8 for neg, should be @-45 to -65
CN5, pins 1 and 4, see board for neg, should be +12v
CN6, pins 1 and 4, see board for neg, should be +12v
CP9, 3rd pin in is neg, 2nd pin in should be +5v, 1st pin should be -5v.
CP17, 6th pin in is neg, 7th pin in is -12v, 5th pin in is +12v.
Let see how you make out.
Last edited by macgyver655 on Thu Dec 18, 2014 3:22 am; edited 1 time in total
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Thu Dec 18, 2014 3:15 am Post subject: |
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what about the jumper across C304? I have not plugged in the receiver since I unplugged it to solder the jumper across C304.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Dec 18, 2014 3:23 am Post subject: |
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I had the CP17 pins wrong. I changed it. The following pic may help.
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Thu Dec 18, 2014 3:29 am Post subject: |
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okay i see the change...what about the jumper across C304? I have not plugged in the receiver since I unplugged it to solder the jumper across C304.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Dec 18, 2014 3:48 am Post subject: |
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Yes, this is what the jumper is for. You would not be able to test for these voltages without it. So just plug in the receiver and start the testing.
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Thu Dec 18, 2014 3:49 am Post subject: |
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okay, got it
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Thu Dec 18, 2014 5:20 am Post subject: |
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CN3 2 and 8 56.7V
CN3 5 and 8 113.2V
CN5 1 and 4 14.8
CN6 1 and 4 13.9V
CP9 0V
CP17 0V
I am not very confident about CP9 and CP17 mac. I was not able to get very good contact with my negative probe on the pins. I did not see any meter fluctuation at all like when your probe tip slips on and off. I will get a micro clip tomorrow and see if I can get a more certain reading.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Dec 18, 2014 5:52 am Post subject: |
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Well something is wrong with CN3, 5 and 8 but we will get back to that.
Forget about test CP9 and CP17 on the connectors. You can test right on the jumpers that are out in the open. Look over this pic. and do the tests.
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Thu Dec 18, 2014 6:09 am Post subject: |
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ov on J146 and J148
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Thu Dec 18, 2014 6:25 am Post subject: |
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I have 0v on and J146, J148, J107, J106
using J147 and J159 jumpers as gound
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Thu Dec 18, 2014 1:28 pm Post subject: |
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gound was typo. meant to type ground. I also checked using chassis ground with same readings
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Dec 18, 2014 3:52 pm Post subject: |
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Right next to connector CP3 there are 2 fuse resistors, R41 and R42. Put your DMM on continuity and test them. They should both read dead short, not open.
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Thu Dec 18, 2014 4:06 pm Post subject: |
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okay mac, I made another error...I accidently unplugged CP3 at some point before the last measurements and I just now discovered it when I went to test the 2 fuse resistors.
So, correction J146 & J148 12v J106 & J107 5v
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu Dec 18, 2014 4:32 pm Post subject: |
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| jgrice53 wrote: | okay mac, I made another error...I accidently unplugged CP3 at some point before the last measurements and I just now discovered it when I went to test the 2 fuse resistors.
So, correction J146 & J148 12v J106 & J107 5v |
I am assuming you mean:
J146 is -12v
J106 is -5v
Is my assumption correct?
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jgrice53
Joined: 10 Dec 2014
Posts: 165
Location: marion, sc 29571
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| Posted: Thu Dec 18, 2014 4:39 pm Post subject: |
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yes
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