REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Tuesday, 19 March 2019

TOKAI LT-VHS36 - T6608FJ [CHINA] - SCHEMATIC DIAGRAMS - POWER SMPS USING 2SK2647 FET AS POWER SWITCHING, H/V SCAN OUTPUT - CRT BASE CARD SCHEMATIC & MECHANICAL ALIGNMENTS TO VCR

TOKAI LT-VHS36 - T6608FJ [CHINA] - SCHEMATIC DIAGRAMS - POWER SMPS USING 2SK2647 FET AS POWER SWITCHING, H/V SCAN OUTPUT - CRT BASE CARD SCHEMATIC & MECHANICAL ALIGNMENTS TO VCR


POWER SUPPLY SCHEMATIC
HORIZONTAL & VERTICAL SCAN OUT
CRT BASE CARD CBA SCHEMATIC
{Click on pictures to Magnify}
MECHANICAL ALIGNMENTS
  • Disconnect the AC plug.
  • Remove the Top Case and Front Assembly.
  • Insert a cassette tape. Though the tape will not be automatically loaded, make sure that the cassette tape is all the way in at the inlet of the Cassette Holder. To confirm this, lightly push the cassette tape further in and see if the tape comes back out, by a spring motion, just as much as you have pushed in.
  • Turn the LDG Belt in the appropriate direction shown in Fig for a minute or two to complete this task.
To unload a cassette tape manually:
  • Disconnect the AC plug.
  • Remove the Top Case and Front Assembly.
  • Make sure that the Moving guide preparations are in the Eject Position.
  • Turn the LDG Belt in the appropriate direction shown in Fig until the Moving guide preparations come to the Eject Position. Stop turning when the preparations begin clicking or cannot be moved further. However, the tape will be left wound around the cylinder.
  • Turn the LDG Belt in the appropriate direction continuously, and the cassette tape will be ejected.  Allow a minute or two to complete this task.
Symptom of Misalignment:
  • If the tape path is unstable during reversing, the tape will be damaged.
  • Note: Do not use an Alignment Tape for this procedure. If the unit is not correctly aligned, the tape may be damaged.
  • Insert a black cassette tape into the tray and set the unit to REV. Then confirm if the tape has been curled up or bent at the Take-up Guide Post[4] or REV Post[5].
  • When the tape has been curled up or bent, turn the alignment screw to adjust the height of REV Post.