Motorola R2001d horizontal problem... plz help

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Naim555
New User
Posts: 2
Joined: Tue Oct 27, 2015 9:24 am

Motorola R2001d horizontal problem... plz help

Post by Naim555 »

when i plug my motorola r2001d i watch just a vertical trace (see picture ) when i select 'scope AC' i have just a spot in screene , i can move this spot in vertical position but no horizontal move when i move horizontal botton .

i test the point TP1 TP4 TP5 TP6 for A2 modul :
TP1 : nice signal (see pic)
tp4 , tp5 : no signal (see pic )
tp6 : nice signal (see pic)
thaks and excuse for my bad english
[img]
http://www.noelshack.com/2015-45-144668 ... 214015.jpg
http://www.noelshack.com/2015-45-144668 ... 223130.jpg
http://www.noelshack.com/2015-45-144668 ... 223318.jpg
http://www.noelshack.com/2015-45-144668 ... 223400.jpg
[/img]
jry
Posts: 481
Joined: Fri Feb 06, 2004 3:14 pm

Re: Motorola R2001d horizontal problem... plz help

Post by jry »

think you already narrowed it down to the horizontal output amp. Maybe early in the amp since the input TP6 is good.

Not sure how you have the scope hooked up but TP4 and TP5 should just be inverted in comparison to each other .

last time I saw this it was the CA3183 IC which is about four indendent transistors ...put a good socket in if you replace this 16 pin DIP device.
If you get desperate you can just select and solder discreet transistors to a DIP header but the CA3183 's are still out there.
DJP126
Posts: 873
Joined: Wed Jun 18, 2003 6:41 am
What radios do you own?: What's a radio?

Re: Motorola R2001d horizontal problem... plz help

Post by DJP126 »

Check the transistors that the heat sinks are mounted to. These are your final deflection amps for vertical and horizontal deflection.
Dave
Naim555
New User
Posts: 2
Joined: Tue Oct 27, 2015 9:24 am

Re: Motorola R2001d horizontal problem... plz help

Post by Naim555 »

jry wrote:think you already narrowed it down to the horizontal output amp. Maybe early in the amp since the input TP6 is good.

Not sure how you have the scope hooked up but TP4 and TP5 should just be inverted in comparison to each other .

last time I saw this it was the CA3183 IC which is about four indendent transistors ...put a good socket in if you replace this 16 pin DIP device.
If you get desperate you can just select and solder discreet transistors to a DIP header but the CA3183 's are still out there.

successssssssssssss 100000000 thanks for you friend jry
i show you my work and the nice result by picture :
my work :
[img]
http://image.noelshack.com/fichiers/201 ... 183141.jpg
[/img]
the result :
[img]
http://image.noelshack.com/fichiers/201 ... 183246.jpg
[/img]
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