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Post by jbmeyer13 on Apr 23, 2015 9:45:56 GMT -5
On tues night my PJ went dark; just like it went it stand-by mode. I swapped out VIM's and determined that it's my 03. I tested continuity on C84 and beep went the meter so I'm thinking there's a short somewhere in the 5 volt line. I'm not sure how to proceed with this. I looked at the 03 schematic posted on this site but I can't make out the letter/numbers and even if I could I wouldn't understand it anyway. How should I proceed in diagnosing this? |
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Post by mastertech on Apr 23, 2015 10:00:44 GMT -5
Is fuse F1 or F2 blown?
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nashou
Unmoderated Off Topic
Tech in Training.....
Posts: 1,239 
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Post by nashou on Apr 23, 2015 10:39:39 GMT -5
Download the schematics. Just enlarging then on the site will not give a clear font. Downloading it you can zoom in as much as you want and the fonts are nice and clear.
Nashou
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Post by jbmeyer13 on Apr 23, 2015 10:45:41 GMT -5
where are they visually located on the VIM? |
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Post by jbmeyer13 on Apr 23, 2015 11:08:52 GMT -5
Beep goes the meter...neither are blown |
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Post by mastertech on Apr 23, 2015 11:23:57 GMT -5
You said your meter beeped when testing C84. We cannot rely on the beep for now. So set your DMM to diode scale and retest C84 and give me the reading.
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Post by jbmeyer13 on Apr 23, 2015 11:49:51 GMT -5
You said your meter beeped when testing C84. We cannot rely on the beep for now. So set your DMM to diode scale and retest C84 and give me the reading. I'm not sure which end is the + and which is the -. Based on looking at some of the surrounding locations it looks like the - is closer to the BNC inputs and the + is closer to the rear of the module. If that is in fact the orientation for C84 and I apply the probes accordingly it does not beep when testing continuity. If I set to diode scale and apply the probes in the same manner the value passes .710 and then moves up very slowly in .001 increments.
If I test the continuity and reverse the probe orientation then it beeps.
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Post by mastertech on Apr 23, 2015 12:07:18 GMT -5
Are F1 and F2 snap in fuses or are they soldered in?
Can you find caps C5,C9,C3 and C6? They should be near those 2 fuses.
I don't have a board layout picture so you will have to hunt for them.
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Post by jbmeyer13 on Apr 23, 2015 12:09:59 GMT -5
Are F1 and F2 snap in fuses or are they soldered in? Can you find caps C5,C9,C3 and C6? They should be near those 2 fuses. I don't have a board layout picture so you will have to hunt for them. F1 and F2 are soldered in and yes I see those caps. |
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Post by mastertech on Apr 23, 2015 12:19:37 GMT -5
Ok, I wont have you unsolder them just yet. Test across C5 and C9 with your dmm on diode scale. Reverse leeds and test them again. Give me the 4 readings you get.
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Post by jbmeyer13 on Apr 23, 2015 17:12:34 GMT -5
Ok, I wont have you unsolder them just yet. Test across C5 and C9 with your dmm on diode scale. Reverse leeds and test them again. Give me the 4 readings you get. C5 is .427 in one direction and when reversed the reading just keeps climbing C9 is .166 in both directions
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Post by mastertech on Apr 23, 2015 18:33:26 GMT -5
This is telling me there is a problem on the -5v side. However, C84 is on the +5v side. Can you do the diode test on C84 both ways again to verify it reads the same as C5?
Also diode test C6 both ways for similarities.
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Post by jbmeyer13 on Apr 23, 2015 19:26:50 GMT -5
This is telling me there is a problem on the -5v side. However, C84 is on the +5v side. Can you do the diode test on C84 both ways again to verify it reads the same as C5? Also diode test C6 both ways for similarities. I did diode test on C84 and it reads .432 one direction and after flipping the probes it steadily increases .001 increments. Same thing on C5. C6 reads .166 in both directions. |
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Post by mastertech on Apr 23, 2015 19:30:57 GMT -5
Ok, that verifies problem is on -5v line. Give me a few minutes to look over the schematics. Do you have a 5,6 or 7 volt wall wart power supply?
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Post by jbmeyer13 on Apr 23, 2015 19:50:21 GMT -5
Wouldnt that be a laptop power adapter used to recharge it?
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