UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Specific Vintage Equipment > Vintage Amateur and Military Radio

Notices

Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment.

Closed Thread
 
Thread Tools
Old 1st Nov 2013, 11:56 pm   #1
PETERg0rsq
Heptode
 
PETERg0rsq's Avatar
 
Join Date: Jun 2009
Location: St Helens, Lancashire, UK.
Posts: 641
Default Jill SX-200

I am having some problems with A JIL SX-200 scanner.

Unfortunatly the only schematic I can find is of quite poor quality, making components difficult to locate. (It is part of a 3.3Mb service manual).

Is there a higher resolution schematic available, or a good copy of the schematic available that I could scan.

What is available is certainly better than nothing, but a better schematic will be very helpful.

Thanks
Peter
__________________
SPECIALIST.....Knows everything about nothing
EXPERT..........Knows nothing about everything
PETERg0rsq is offline  
Old 2nd Nov 2013, 2:27 am   #2
Andrew2
Nonode
 
Andrew2's Avatar
 
Join Date: Mar 2010
Location: Dukinfield, Cheshire, UK.
Posts: 2,033
Default Re: Jill SX-200

No circuit or layouts here, but I have repaired a handful of these venerable receivers. What's the fault?
__________________
Andy G1HBE.
Andrew2 is online now  
Old 2nd Nov 2013, 11:13 am   #3
Restoration73
Nonode
 
Restoration73's Avatar
 
Join Date: Jun 2013
Location: Surbiton, SW London, UK.
Posts: 2,801
Default Re: Jill SX-200

The display the pll chip will be hard to obtain now.
There is quite a good manual here
http://www.rigpix.com/miscrx/jil_sx200_service.pdf
Restoration73 is offline  
Old 3rd Nov 2013, 6:23 pm   #4
PETERg0rsq
Heptode
 
PETERg0rsq's Avatar
 
Join Date: Jun 2009
Location: St Helens, Lancashire, UK.
Posts: 641
Default Re: Jill SX-200

Ive only just made a preliminary check on it.

I have no audio output. I seem to have audio going into the control PCB, but nothing coming out!

The control PCB looks like it is for squelch, muting, and possible some audio amplification.

The scanner may have been reverse connected, as the electrolytic on the input have exploded. The reverse protection diode looks OK though!

Biggest problem I have is cross referencing components on PCB with schematic, as schematic is very low resolution (I have to zoom in 300% to read it, then the numbers are fuzzy).

Plenty of useful information in service manual, so I will set about tracing the audio more methodically tonight.

Peter
__________________
SPECIALIST.....Knows everything about nothing
EXPERT..........Knows nothing about everything
PETERg0rsq is offline  
Old 3rd Nov 2013, 9:48 pm   #5
Paul Adams
Retired Dormant Member
 
Join Date: Apr 2011
Location: Wolverhampton, West Midlands, UK.
Posts: 253
Default Re: Jill SX-200

There's some more info here that may be of interest.

Also this may be the manual that you have already.

HTH

Paul.
Paul Adams is offline  
Old 3rd Nov 2013, 11:27 pm   #6
PETERg0rsq
Heptode
 
PETERg0rsq's Avatar
 
Join Date: Jun 2009
Location: St Helens, Lancashire, UK.
Posts: 641
Default Re: Jill SX-200

Paul

Thanks

Already aware of that thread, and ...alas,... that is the manual I already have.

Made more progress now, The CPU was sending out an output to Q202 to mute the audio for some reason. Disconnected the output and now traced audio to the volume pot.

Dismantled pot and found fingers had broken away from the slider, so now in process gluing these back (lost my epoxy so need to buy some more )

Hopefully that will restore audio.

Get a nice AM tone, but a ragged FM tone, at the volume pot, so may need some more work in the FM side.

Peter
__________________
SPECIALIST.....Knows everything about nothing
EXPERT..........Knows nothing about everything
PETERg0rsq is offline  
Old 4th Nov 2013, 12:30 am   #7
Julesomega
Nonode
 
Julesomega's Avatar
 
Join Date: Dec 2012
Location: Stockport, Greater Manchester, UK.
Posts: 2,085
Default Re: Jill SX-200

Ah, the JIL SX-200, intermod in a box ;-) (at least mine is) but nice to use
I should have legible schematics if you can wait while I find them. Had to get a new µproc from Garex but that was a long time ago and I've not used it since TETRA came in...
Julesomega is offline  
Old 4th Nov 2013, 10:10 am   #8
Andrew2
Nonode
 
Andrew2's Avatar
 
Join Date: Mar 2010
Location: Dukinfield, Cheshire, UK.
Posts: 2,033
Default Re: Jill SX-200

Peter, I have a (rather poor) block diagram which may help put things in perspective. If you want a copy, PM me with your e-mail address.
__________________
Andy G1HBE.
Andrew2 is online now  
Old 4th Nov 2013, 7:14 pm   #9
PETERg0rsq
Heptode
 
PETERg0rsq's Avatar
 
Join Date: Jun 2009
Location: St Helens, Lancashire, UK.
Posts: 641
Default Re: Jill SX-200

Thanks for the offers of help.

The service manual does contain a useful block diagram which is quite readable, so no problems there, thanks.

Happy to wait for the possibility of some decent schematics, though hopefully this should be working this evening, if my repairs to the volume pot hold out.

Not sure what else I will find wrong with it though!

peter
__________________
SPECIALIST.....Knows everything about nothing
EXPERT..........Knows nothing about everything
PETERg0rsq is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 10:59 am.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.