No Radio Pick Up Solved In PHILIPS 2-In-1 Model 15DR437/00
This was brought to me with the complaint that there was no radio pick-up. The cassette side was not being used and need not be rectified was the instruction from him. When I applied power in front of the customer, it was getting on with no radio output; i.e., amp side was working and the hissing noise was also heard on changing the bands.
I opened the set and cleaned it thoroughly. Then dismantled it. Checked and marked the AC output in secondary for future service by anyone. It was reading 11.72V without any load.
The condition of the capacitors aroused my thrill to replace all of them:
I replaced all the electrolytic capacitors on both the boards. Then retouched every solder point, cleaned the boards thoroughly using IPA. The TRA (Telescopic Rod Antenna) was broken and in bad shape. I replaced it too. Then lubricated all the controls and switches using Armstrong Switch Cleaning Oil.
After that, when I interconnected the boards and speakers and applied power, it was working very well. The Radio was superb and it worked very well on all bands. I allowed it to run for several hours before putting the boards back and closing the back cover. I used the Radio tuning it to my favorite stations and listened to the powerful and wonderful voice emanating from it.
Good quality sound output was experienced. It was using a TDA2822 as its power amp, which is a good one, an 8 PIN IC needing very few external components. Mission accomplished easily and resultant satisfaction got collected to the bag!
This article was prepared for you by Parasuraman Subramanian from India. He is 74 years old and has more than 30 years’ experience in handling antique equipment like Valve Radio, Amps, Reel Tape Recorders and currently studying latest tech-classes conducted by Kerala State Electronics Technicians’ Association. He has done graduation in BBA degree, private diploma in Radio Engineering and retired as MD of a USA company. Presently working as Consultant to Hospital and other institutions.
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Waleed Rishmawi
April 27, 2024 at 4:47 pm
Love the easy and quick repair adding to it the joy of replacing capacitors, good job my friend. Have a blessed day.
Parasuraman S
April 27, 2024 at 9:40 pm
Many thanks for your encouraging comments, dear friend!
Yogesh Panchal
April 27, 2024 at 6:02 pm
Good Job!Sir
Parasuraman S
April 27, 2024 at 9:40 pm
Many thanks!
Albert van Bemmelen
April 27, 2024 at 9:58 pm
A tedious cleaning and cap replacing job! I guess that out of aged time perspective you just decided to replace all of them like you always do without measuring all of them.
Let us hope that FM Radio stations still exist in the near future because DAB radio will render all our old FM receivers to useless devices by then.
Parasuraman S
April 29, 2024 at 5:28 pm
Yes, true; that's what I did. Yes, there is a threat. But it's way off! Many thanks for your expert opinions!
Wesley
April 28, 2024 at 5:21 am
Very nice work...educational.
Parasuraman S
April 29, 2024 at 5:28 pm
Many thanks!
Imoudu.O
April 29, 2024 at 4:48 am
Good at dealing with old stuff!!!, thanks sir.
Parasuraman S
April 29, 2024 at 5:29 pm
Many thanks, dear!
Jayakumar P
April 30, 2024 at 6:08 pm
Very good work sir.
Thanks
Parasuraman S
May 1, 2024 at 8:08 pm
Many thanks dear Jayakumar!