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TDA2658 IC Replaced in Philips Color Monitor

By on October 8, 2016
how-to-repair-crt-monitor

 

 

 

 

 

 

 

More than two months ago I ordered a TV transmitter from China (the PAT 550) so I could watch television in my other rooms were I had no reception. After all those years not been able to. And when it gets cold in wintertime it is nice to be able to watch television from a warm bed without having to stand up. (I only use central heating in my Living room, so my Bedrooms stay very cold in winter. And I do not want to waste energy in these very bad isolated Rooms).
I used to have a four channel adjustable 2.4GHz Transmitter but it had so much interference from 2.4GHz Internet Routers in my apartment now that I was unable to watch the TV signal without fierce Router disturbances .




With the new Transmitter I am now also perfectly able to switch the channels with my IR transmitter. Because the Transmitter supports 2 channels at the same time. One channel at 5.8GHz for transmitting the perfect HD Video signal to my bedroom(s). And another channel at 433 Mhz for the IR control signal back to the receiver. And it really works superb! And the Video quality is so much better than I first expected. Just as the great working IR control.
Only drawback is that the Transmitter with one supporting receiver only supports Scart Input and Output signals. Which is no problem with any older TV or Monitor and my Dreambox Satellite receiver that also still supports one Scart Output port and also one HDMi Output connection.
Because I had some older Color Commodore 64/128 Monitors that also have Scart input I used one to test my new TV Transmitter. But while receiving the signal on a CM8833 Philips Monitor it broke down. The internal Vertical TDA2658 deflection IC had given up while locking on to the very high quality signal. And my Monitor only gave a bright horizontal white line on screen after that. After opening the Monitor I couldn’t find any other problem than the Vertical deflection IC itself.
So I ordered on 27 July five of them for only about 4 US Dollar free Shipping. And today at 19 September 2016 they finally arrived after almost 2 months of waiting. And this article is about repairing the defect CM8833 Philips Color Monitor (with green screen button for Word Processing when needed). Below the now from the Monitor Board removed defective Vertical Deflection IC.

philips-crt-monitor-repair

crt-monitor-repair

fix-crt-monitor

repairing-monitor

heatsink-in-crt-monitor

On previous photos it shows that removing the Mainboard out of the Monitor Housing, after all
Connectors and a couple of Ground wires are removed, is easily done.
And both Component top and Bottom Solder sides of this IC302 are shown before soldering the new
replacement.

tda2658-ic

Above Photos show the new replacement TDA2658 I received after almost 2 months of waiting. Just
before soldering it into the Board. Because of the white (Cooling Paste?) it looks kind of if they are
already used before. And that was why I was afraid that it would not going to work. But as it turned
out, the Chip was okay and maybe removed out of an old Board but still working great!
Before I could remove the old TDA2658 and replace it by a new IC, I had to partly remove the Metal
Bottom Shield Plate. And resolder it back to the Mainboard as can be seen on the Photo below.

mainboard-crt-monitor

Next Photo shows the Scart Back panel with the temporary from the tube removed CRT
Board.

circuit-board-for-monitor

And the Photos following show the result. Only one component replaced, at almost no cost as often
is the case, and a completely like new working Monitor again!

crt-monitor-repaired

crt-monitor-repairing

It is funny that these old CRT color Monitors still are of use in these era of HDMi connected signals and High Definition Television days. Who would ever have thought that it would go so fast. A well known expression is “seeing is believing” while looking back on another successful repair.
And knowing that there were millions of Commodore 64 and maybe also Amiga Computers made , they still all work perfectly on these “ancient” CRT Monitors. That is also the reason why the CM8833, this repair was about, has an integrated Sound Amplifier. The SID Chip in the C64/128 and the Amiga Music Chip composed great Music (MOD files). Long before MP3 was the widely accepted File Format. Until another repair.

albert1
Albert van Bemmelen, Weert, The Netherlands



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Note: You can read his previous repair article in the below link:

https://jestineyong.com/16-channel-digital-video-recorder-repair/

 

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20 Comments

  1. Yogesh Panchal

    October 8, 2016 at 4:58 pm

    Good job! Albert.

    Likes(1)Dislikes(0)
    • Albert van Bemmelen

      October 8, 2016 at 5:13 pm

      Thanks Yogesh.

      Likes(0)Dislikes(0)
  2. Robert Calk

    October 8, 2016 at 5:31 pm

    Good job, Albert. It is always nice to see devices saved from the junk yard.

    Likes(1)Dislikes(0)
  3. Parasuraman

    October 8, 2016 at 5:40 pm

    Excellent!

    Likes(1)Dislikes(0)
  4. Bulent NUR

    October 8, 2016 at 6:05 pm

    Good job, thanks Sir, I never seen before scart in monitor.

    Likes(0)Dislikes(0)
    • Albert van Bemmelen

      October 9, 2016 at 2:59 am

      It is introduced in Europe around 1981. And the name SCART is a French name and was designed to connect audio and videosignals by using just one plug. It is disapearing slowly though in favour of HDMi.

      Likes(1)Dislikes(0)
  5. Ross Wedding

    October 8, 2016 at 6:39 pm

    Excellent work Albert

    Likes(1)Dislikes(0)
  6. beh

    October 8, 2016 at 10:16 pm

    HI ALBERT
    thanks for this more or less nostalgic article about this old monitor yes the electronic technologies is growing faster than we imagine and for repairer there are more problem in future .
    regards
    beh

    Likes(0)Dislikes(0)
  7. Joop

    October 8, 2016 at 10:20 pm

    Hello Albert,
    Where do you buy the TDA2658? All I see much higher prices on ebay.
    Incidentally, thanks for all your items. I learn a lot from there.
    Joop.

    Likes(0)Dislikes(0)
    • Albert van Bemmelen

      October 9, 2016 at 3:09 am

      I will have a look back who sold them to me and see if it still exist as item. And I will post my reply here later. But possibly it was a one time sell like often is the case with on-line products.

      Likes(0)Dislikes(0)
      • Albert van Bemmelen

        October 9, 2016 at 3:19 am

        Hi Joop. Look here: https://nl.aliexpress.com/item/TDA2658-5pcs-lot/32468081534.html?spm=2114.13010608.0.0.tgOnf9

        They are still available as you can see at my previous Seller.
        Good luck. (it may take some time before you'll recieve them).

        Likes(1)Dislikes(0)
  8. Andre Gopee

    October 8, 2016 at 10:42 pm

    Great Job Albert.

    Likes(1)Dislikes(0)
  9. Anthony

    October 9, 2016 at 9:23 am

    Well done again Albert !

    Kind Regards

    Likes(1)Dislikes(0)
  10. Lynn Blakely

    October 10, 2016 at 3:35 am

    Great Job Albert. I owned a magnavox monitor one of the first to display 80 characters on a horizontal line. We used it on a commodore 64 and 128.
    after selling the commodore's I used it on my test bench to compare with color tracking, on tv's. It had the best crt color tracking of any set we compared it with. You could turn the color off and it would display black and white. Then turn the brightness up or down and it would render black and white all through the range.

    Likes(0)Dislikes(0)
  11. Albert van Bemmelen

    October 10, 2016 at 1:15 pm

    Thanks Lynn. Yes they still work great and present a clear bright picture because of the glass crt tube. Like now only the LCD monitors, and television sets, with the glass plates on front show the same clear bright pictures too!

    Likes(0)Dislikes(0)
  12. Humberto

    October 13, 2016 at 12:02 am

    Hi Albert, nice repair as usual. Congratulations.

    Likes(0)Dislikes(0)
    • Albert van Bemmelen

      October 13, 2016 at 5:17 am

      Thanks Humberto. I hope to see another article from you like the interesting Line Protector repair you did. But maybe complete with schematic (only a LM324 used and a lot of passive components and a relay) or part list. Or decent resolution photos would be nice to be able to tell the component values. We do not have these devices in our country but it could be useful in case we get an occasional power surge. It could help to protect my valuable Tektronix Oscilloscopes and/or other devices. But then maybe enhanced with an upgrade to a larger relay too.

      Likes(0)Dislikes(0)
  13. Abdur-Rab

    October 13, 2016 at 7:20 pm

    Dear Jestineyong!!

    Very Good Day!

    Many many thanks for your e-mails with different important & useful links.

    Though I am / was working with Electronics for the last forty-five years. Worked with Navy for more than twelve years. Later worked with British Firm Marconi International Marine Co. (M.I.M.C.O.) as Radio Technician & Radio Service Engineer for more than seven years. Later worked onboard Merchant Navy Vessels as Radio Officer & whenever I was on leave, worked as Free Lancer Technician / Radio Surveyor with different Companies. Presently working with a Company dealing with Electronic Navigation / Communication Equipment. I am not directly involved in repairing of Electronic Equipment at component level, but am much intrested in learning the latest techniques etc. Whenever I get time, I go through your articles and enjoy all.

    Thanks again. Will keep in touch.

    Best Regards
    Abdur-Rab

    Likes(1)Dislikes(0)
    • Jestine Yong

      October 14, 2016 at 2:36 pm

      Hi Abdur-Rab,

      You are welcome.

      Jestine

      Likes(0)Dislikes(0)
  14. Gaspar Mendonça

    November 25, 2017 at 10:02 am

    Hi Albert,

    I found your repair guide about replacing the TDA2658 IC in Philips Color Monitor because i was looking for help to repair my CM 8833.

    When i turn it on I got no power led but i can hear an high pitch whining effect like if it was still generating EHT voltage at the anode. i also got no picture...

    I was using it with my Amiga for 2 hours and then when i connected my supergun for my neogeo mvs that i bought from retroelctronik he failed about 10min later...

    http://retroelectronik.com/fr/arcade-supergun/145-arcade-supergun-pro-gamer-autofire-et-voltmetre-integres-5674864654514.html

    I apreciate any help you can give me.

    Thank You

    Gaspar Mendonça

    From: Porto - Portugal

    Likes(0)Dislikes(0)

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