Circuit, please, for Saisho CT142RX - UK Vintage Radio Repair and Restoration Discussion Forum

Mike Phelan · 3rd Dec 2009, 5:56 pm

I think it's a really a Matsui 1440A - not on Paul's database.

Thanks in advance.

Darren-UK · 4th Dec 2009, 1:37 am

Available from here, in Matsui guise, if you don't mind digging into your pocket.

Mike Phelan · 4th Dec 2009, 10:06 am

Thanks, Darren, if nobody comes up with one here, I'll have to put some money in my pocket to replace the fluff.

Nickthedentist · 4th Dec 2009, 10:12 am

Or try the U-View books in your local main library.

Isn't this the one with the avalanche diode across the HT line that tends to go s/c for no apparent reason?

What's the fault? Might be worth a Google?

Nick.

Mike Phelan · 4th Dec 2009, 12:57 pm

Thanks, Nick; not a place I visit very often so didn't know about U-View.

Fault is lack of width & height (probably low HT) and it's not electrolytics.
If I can get a circuit I'll sort it, so no worries there.

ben · 4th Dec 2009, 1:24 pm

I believe this is an ONWA.
search here there are a couple. download and compare.

post a pic of the pcb if poss.

MALC SCOTT · 4th Dec 2009, 2:27 pm

Orion chassis. I must have repaired thousands of these good little sets over the years. These were Currys/Dixons best selling portable for years.
Check the ht rail. i seem to think it is around the 100v.
If that is down then the STR50103 reg ic is suspect.
Diss the ht feed to the loptx and put a 40w light bulb across the ht smoothing cap and measure it.
The psu is self osc and will run ok with a dummy load.
PM me if you get any problems. Cheers, Malc.

Nickthedentist · 4th Dec 2009, 2:55 pm

Quote:

Originally Posted by Mike Phelan

... didn't know about U-View.

They were/are a series of annual books containing circuit diagrams of the year's TVs and VCRs. They carried on roughly where Molloy & Poole left off.

Nick.

Mike Phelan · 4th Dec 2009, 3:58 pm

Thanks, folks.

Ben, I'll take a pic when I've a moment.
Malc, I'll try what you said, but if it needs more than a component from my junkbox, it will land here as "offered" as it does work.

I'll close the thread and start a new one if I need help, but if anyone has a circuit to hand, please PM me.

3rd Dec 2009, 5:56 pm	#1
Mike Phelan Dekatron Join Date: Nov 2003 Location: Near Leeds, West Yorkshire, UK Posts: 4,609	Circuit, please, for Saisho CT142RX I think it's a really a Matsui 1440A - not on Paul's database. Thanks in advance. __________________ Mike.

4th Dec 2009, 1:37 am	#2
Darren-UK Retired Dormant Member Join Date: Apr 2003 Location: Blackpool, Lancashire, UK. Posts: 4,061	Re: Circuit, please, for Saisho CT142RX Available from here, in Matsui guise, if you don't mind digging into your pocket.

4th Dec 2009, 10:06 am	#3
Mike Phelan Dekatron Join Date: Nov 2003 Location: Near Leeds, West Yorkshire, UK Posts: 4,609	Re: Circuit, please, for Saisho CT142RX Thanks, Darren, if nobody comes up with one here, I'll have to put some money in my pocket to replace the fluff. __________________ Mike.

4th Dec 2009, 10:12 am	#4
Nickthedentist Dekatron Join Date: Jan 2005 Location: Oxford, UK. Posts: 17,838	Re: Circuit, please, for Saisho CT142RX Or try the U-View books in your local main library. Isn't this the one with the avalanche diode across the HT line that tends to go s/c for no apparent reason? What's the fault? Might be worth a Google? Nick.

4th Dec 2009, 12:57 pm	#5
Mike Phelan Dekatron Join Date: Nov 2003 Location: Near Leeds, West Yorkshire, UK Posts: 4,609	Re: Circuit, please, for Saisho CT142RX Thanks, Nick; not a place I visit very often so didn't know about U-View. Fault is lack of width & height (probably low HT) and it's not electrolytics. If I can get a circuit I'll sort it, so no worries there. __________________ Mike. Last edited by Mike Phelan; 4th Dec 2009 at 12:58 pm. Reason: Missing apo.

4th Dec 2009, 1:24 pm	#6
ben Dekatron Join Date: Aug 2006 Location: Madrid, Spain / Wirral, UK Posts: 7,498	Re: Circuit, please, for Saisho CT142RX I believe this is an ONWA. search here there are a couple. download and compare. post a pic of the pcb if poss. __________________ Regards, Ben.

4th Dec 2009, 2:27 pm	#7
MALC SCOTT Octode Join Date: Aug 2006 Location: Willington, County Durham, UK. Posts: 1,499	Re: Circuit, please, for Saisho CT142RX Orion chassis. I must have repaired thousands of these good little sets over the years. These were Currys/Dixons best selling portable for years. Check the ht rail. i seem to think it is around the 100v. If that is down then the STR50103 reg ic is suspect. Diss the ht feed to the loptx and put a 40w light bulb across the ht smoothing cap and measure it. The psu is self osc and will run ok with a dummy load. PM me if you get any problems. Cheers, Malc. __________________ Malc Scott Last edited by MALC SCOTT; 4th Dec 2009 at 2:34 pm.

4th Dec 2009, 3:58 pm	#9
Mike Phelan Dekatron Join Date: Nov 2003 Location: Near Leeds, West Yorkshire, UK Posts: 4,609	Re: Circuit, please, for Saisho CT142RX Thanks, folks. Ben, I'll take a pic when I've a moment. Malc, I'll try what you said, but if it needs more than a component from my junkbox, it will land here as "offered" as it does work. I'll close the thread and start a new one if I need help, but if anyone has a circuit to hand, please PM me. __________________ Mike.