|
|
Post by mastertech on Dec 20, 2016 13:31:08 GMT -5
I have to run out for a couple hours so if F1 and CR10 both test ok then you will next have to check a couple voltages so the projector will have to be running.
Set DMM to DC voltage and clip neg probe to ground.
On the neckboard, test both sides of F1 for +185v.
On the neckboard locate IC1. Should be on the heat sink. Does not matter if you know which leg is what, just test each leg with your pos probe.
1 leg should be +20vdc
1 leg should be +12vdc and
1 leg should be zero.
i will check in when I get back.
|
|
lbdk
Junior Member
Posts: 25 
|
Post by lbdk on Dec 20, 2016 13:37:53 GMT -5
CR10 and F1 ok.. CR10 read 501 to 513
|
|
|
|
Post by mastertech on Dec 20, 2016 13:38:58 GMT -5
Ok, see my post above. On my way out now.
|
|
lbdk
Junior Member
Posts: 25
|
Post by lbdk on Dec 20, 2016 14:07:07 GMT -5
there is no F1 fuse on my neckboard... Got to measure 1 leg to +19vdc. Then shorted 2 legs with probe and blew a fuse on SMPS. Try again tomorrow. Thankyou for now:-)
|
|
|
|
Post by mastertech on Dec 20, 2016 16:23:51 GMT -5
What is at the location circled in blue on your neckboard?  |
|
lbdk
Junior Member
Posts: 25
|
Post by lbdk on Dec 20, 2016 23:21:38 GMT -5
|
|
|
|
Post by mastertech on Dec 20, 2016 23:48:02 GMT -5
On that neckboard it is right here:  |
|
|
|
Post by mastertech on Dec 20, 2016 23:52:32 GMT -5
It is night here and I got to go. Take your time and check those voltages carefully. Be aware of where your hands are at all times when the projector is running and you are testing.
To avoid your probe slipping, file the tip nice and sharp pointed. Wont slip then.
|
|
lbdk
Junior Member
Posts: 25
|
Post by lbdk on Dec 21, 2016 0:06:39 GMT -5
I will be carefull, thankyou. Here its 5 in the morning. Till later:)
|
|
lbdk
Junior Member
Posts: 25
|
Post by lbdk on Dec 21, 2016 3:48:46 GMT -5
IC1 seems to be ok. F1 is 16v one side, 218v other side. on blue 218 & 0
|
|
|
|
Post by gjaky on Dec 21, 2016 6:05:53 GMT -5
So F1 is blown on both boards.
|
|
lbdk
Junior Member
Posts: 25
|
Post by lbdk on Dec 21, 2016 6:29:31 GMT -5
All three of them:)
|
|
|
|
Post by gjaky on Dec 21, 2016 6:38:42 GMT -5
So this is why you get the full bright picture. Replace that fuse temporarily on the green card with a 10-20 Ohm 0.5w resistor and see if it is blowing up or remains moderateliy warm, also check the screen. Only green card, all the needed connections should be done.
|
|
|
|
Post by stridsvognen on Dec 21, 2016 9:43:34 GMT -5
And when you finish the 3600, you can put together the 4200 i gave you.. And you will be the one in europe with the most working Ampro projectors.. ;-)
|
|
lbdk
Junior Member
Posts: 25
|
Post by lbdk on Dec 21, 2016 9:48:55 GMT -5
Ahh stridsvognen... Waiting for something Much better :-)
|
|
