Restored Roberts RIC1 - UK Vintage Radio Repair and Restoration Discussion Forum

Andrew c · 11th Nov 2005, 8:49 pm

Hi All I have a Roberts RIC1 and have been at it all day the fault is low sound output I found some dry joints and checked the output transisters and these appear to be ok so would be grateful for any help thanks

Andy

howard · 13th Nov 2005, 10:28 am

Hello Andy,

If you cant sort out the volume problem with your RIC1 cos it turns out to be a fault in the IC module, which it may well be, I know someone who has a load of scap Roberts chassis and IC modules and I should be able to get you one.

Regards......Howard

Andrew c · 13th Nov 2005, 7:48 pm

Hi All I've still not managed to crack this one I have looked at the service manual and the IC voltage table does not give a voltage for pins 1/10 /12/14 just a hyhpen please can someone assist me by providing a second oppinion on this the voltages on my chip are as follows
pin1 has 1.4 volts
pin10 has 2.1 volts
pin12 has 7.4 volts
pin14 has 7.1 volts

I suspect the IC to be the cause but I would be very grateful for infomation given as this is a real stinker thanks

Andy

ukcol · 13th Nov 2005, 11:02 pm

Hi Andy

The voltages you have on pins 1, 10, 12 and 14 of the TAD100 are about right I would say.

Can you tell us any more about the fault? Do you get plenty of stations on both wavebands but just low volume? Or is the set insensitive. If there are plenty of stations that suggests the low volume is an audio fault. On the other hand if you can only receive a couple of strong local stations, then the fault is more likely to be in the RF or IF circuits.

What test equipment do you have? And have you replaced any capacitors yet?

Andrew c · 14th Nov 2005, 12:07 am

Hi All I finaly cracked it this radio was purchased from ebay for £2.60 and had low volume and was rather grubby however the low volume was cured by replacing C17 this was rated at 32 mfd the replacment was 22mfd and the radio sounds very nice the case was scrubbed and polished and the rexine was repaired this one has really turned out nice this one was a real challenge for me it took me three days to sort out

Andy

Andrew c · 14th Nov 2005, 10:53 pm

Hi Chaps I appoligize for not explaining the cure to my fault in the correct place I just diden't see the need to explain it twice.

Andy

mikelect · 14th Nov 2005, 11:02 pm

You only need to explain it once in the correct place

Mike

howard · 15th Nov 2005, 6:03 pm

Hiya Andy,

Thats a brilliant RIC1 for just £2.60, mine cost a lot more than that and looks no better .....

Howard

JoshWard · 11th Dec 2005, 7:19 pm

I myself have an RIC1. I have done some fault tracing and it looks like I have a faulty IC. I have got a replacement, it justs needs fitting.

11th Nov 2005, 8:49 pm	#1
Andrew c Tetrode Join Date: Sep 2005 Location: Stockport, Cheshire, UK. Posts: 72	Roberts RIC1 Hi All I have a Roberts RIC1 and have been at it all day the fault is low sound output I found some dry joints and checked the output transisters and these appear to be ok so would be grateful for any help thanks Andy

13th Nov 2005, 10:28 am	#2
howard Nonode Join Date: May 2005 Location: Godalming, Surrey, UK. Posts: 2,593	Re: Roberts RIC1 Hello Andy, If you cant sort out the volume problem with your RIC1 cos it turns out to be a fault in the IC module, which it may well be, I know someone who has a load of scap Roberts chassis and IC modules and I should be able to get you one. Regards......Howard

13th Nov 2005, 7:48 pm	#3
Andrew c Tetrode Join Date: Sep 2005 Location: Stockport, Cheshire, UK. Posts: 72	Re: Roberts RIC1 Hi All I've still not managed to crack this one I have looked at the service manual and the IC voltage table does not give a voltage for pins 1/10 /12/14 just a hyhpen please can someone assist me by providing a second oppinion on this the voltages on my chip are as follows pin1 has 1.4 volts pin10 has 2.1 volts pin12 has 7.4 volts pin14 has 7.1 volts I suspect the IC to be the cause but I would be very grateful for infomation given as this is a real stinker thanks Andy

13th Nov 2005, 11:02 pm	#4
ukcol Rest in Peace Join Date: May 2003 Location: Harlaxton, Lincolnshire, UK. Posts: 3,944	Re: Roberts RIC1 Hi Andy The voltages you have on pins 1, 10, 12 and 14 of the TAD100 are about right I would say. Can you tell us any more about the fault? Do you get plenty of stations on both wavebands but just low volume? Or is the set insensitive. If there are plenty of stations that suggests the low volume is an audio fault. On the other hand if you can only receive a couple of strong local stations, then the fault is more likely to be in the RF or IF circuits. What test equipment do you have? And have you replaced any capacitors yet?

14th Nov 2005, 12:07 am	#5
Andrew c Tetrode Join Date: Sep 2005 Location: Stockport, Cheshire, UK. Posts: 72	Restored Roberts RIC1 Hi All I finaly cracked it this radio was purchased from ebay for £2.60 and had low volume and was rather grubby however the low volume was cured by replacing C17 this was rated at 32 mfd the replacment was 22mfd and the radio sounds very nice the case was scrubbed and polished and the rexine was repaired this one has really turned out nice this one was a real challenge for me it took me three days to sort out Andy Attached Thumbnails

14th Nov 2005, 10:53 pm	#6
Andrew c Tetrode Join Date: Sep 2005 Location: Stockport, Cheshire, UK. Posts: 72	Re: Restored Roberts RIC1 Hi Chaps I appoligize for not explaining the cure to my fault in the correct place I just diden't see the need to explain it twice. Andy

14th Nov 2005, 11:02 pm	#7
mikelect Retired Dormant Member Join Date: Sep 2003 Location: Wrexham, North Wales, UK. Posts: 799	Re: Restored Roberts RIC1 You only need to explain it once in the correct place Mike

15th Nov 2005, 6:03 pm	#8
howard Nonode Join Date: May 2005 Location: Godalming, Surrey, UK. Posts: 2,593	Re: Restored Roberts RIC1 Hiya Andy, Thats a brilliant RIC1 for just £2.60, mine cost a lot more than that and looks no better ..... Howard

11th Dec 2005, 7:19 pm	#9
JoshWard Octode Join Date: Dec 2005 Location: Near Stowmarket, Suffolk, UK. Posts: 1,962	Re: Restored Roberts RIC1 I myself have an RIC1. I have done some fault tracing and it looks like I have a faulty IC. I have got a replacement, it justs needs fitting.