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!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Saturday, 23 February 2019

DURABAND - T6609BK REPAIR HELP TV-VCR COMBINATION

  TO SETUP SERVICE MODE   DURABAND - T6609BK REPAIR HELP TV-VCR COMBINATION

  1. Turn the Power ON, by the front panel Power ON | OFF switch on the set.
  2. Press [Standby => 2 => 7 => 1 => Mute] buttons on the remote in sequence, within [5] seconds.
  3. To Exit from service mode, press [Standby | On] button on the remote control.
TO SETUP OPTION CODE.
  • Enter the service mode.
  • Press "Status" button on the remote control unit.  The option code appears on the display.
  • If needed, input the option code (0128), using number buttons on the remote control.
  • To reset the Software, press "Pause" and (5) buttons on the remote control.  The option code is changed.
TO INITIALIZE THE SET
  1. Turn the Power On, by using the front panel Power ON | OFF switch.
  2. To enter service mode, press [Standby / On => 2 => 7 => 1 => Mute] buttons on the remote control, in that order within [5] seconds.
  3. To cancel the Service Mode, press "Standby | On] button on the remote control.
  4. Press [sleep] button on the remote control unit to start initialization.  During initialization OSD indication (digits) on the four corners of the TV screen blinks to white.  After initialization, OSD indication lights to Red.
  5. Turn the Power Off, by pressing Main Power button on the TV unit, and 'unplug' the AC cord from AC outlet.
MECHANICAL TROUBLE INDICATIONS

  • If the monitor is turned On right after the Mechanical Malfunction ocurs on POWER/SAFETY/X-RAY is turned On, display the following character to show malfunction after the Eject display.


  1. Reel Malfunction   =>  R
  2. Drum Malfunction   => D
  3. Cassette Loading Malfunction  => C
  4. Tape Loading Malfunction  => T
  5. P-Safety-1  => 1
  6. P-Safety-2  => 2
  7. X-Ray  => X

DURABAND - T6609BK REPAIR HELP TV-VCR COMBINATION




MALFUNCTION EVALUATION METHODS

X-RAY PROTECT

If X-Ray port becomes continuously 2.5V or more for 120ms, the unit shall immediately turn off the Power/Monitor and will switch over to the mechanical malfunction mode with Power Off.  To turn from this mode shall become possible only by Power key, as the case of the Mechanical Malfunction.

MECHANICAL MALFUNCTION DETERMINATION

Reel Malfunction Detection.

Countermeasure for Reel and Capstan motor rotation malfunction; except cassette loading mechanism.  After the malfunction detection with Reel of Capstan sensor the unit shall switch over to 'stop', and be reel Mechanical Malfunction.

If the T-Reel pulse is not impressed after a lapse of 7 seconds at SP, 14 seconds at LP or more in reel rotation mode like Play/record, FS, RS Mode, and the T-Reel or S-Reel pulse is not impressed after a lapse of 4 seconds or more in Reel Rotation mode of FF/REW, it shall be assumed to 'Stop' and the unit be Reel Mechanical Malfunction.

If the C-FG pulse is not impressed for a lapse of 1 second or more during the Capstan Motor rotation , it shall be Motor Rotation Malfunction.

Drum Malfunction Detection.

If the variation of D-FG input level is not detected for a lapse of 1 second, or more, when D-Cont is "H"it shall be assumed to be Rotation Malfunction and be Drum Malfunction.  When detect Drum Malfunction, Power shall be turned Off after the unit switches over to 'Stop' B mode.

TAPE LOADING MALFUNCTION


  • If LD-SW does not go to the established position after a lapse of 7 seconds or more from Tape Loading or Tape Unloading start, the loading function shall immediately be stopped and power be turned Off, and inform the timer about the Loading Mechanical Malfunction.
  • LD Switch position Malfunction at each mode, even if the LD-SW position changes from the established one in its mode, it keeps the function according to its mode.
COUNTERMEASURE FOR CASSETTE LOADING MALFUNCTION.
  • If LD-SW does not go to SB position after a lapse of 5 seconds, or more from the cassette insertion start, the unit start the cassette out operation.  After switch over to cassette out operation and then a lapse of 5 seconds or more from the Cassette Out operation start, if LD-SW does not go to the EJ position, or if the start sensor and end sensor does not turn On at the EJ position, the unit starts again to insert cassette.  
CASSETTE OUT OPERATION MALFUNCTION
  • After a lapse of 5 seconds or more from Cassette Out operation start, if LD Sw does not go to  the EJ position or if the Start Sensor and end sensor does not turn On at EJ position, the unit starts to insert cassette.    When the unit switches over to cassette insertion at cassette in or cassette out Malfunction, if the LD-SW does not go to the SB position after a lapse of 5 seconds or more from Cassette insertion start, the function shall immediately  stopped, and power be turned Off, and the unit be Cassette Loading Malfunction.  When Power is turned On, if the CL position or GC position cannot be detected after 5 seconds LD-REV operation and LD-FWD operation, the function shall immediately stopped and power be turned Off, and the unit be Cassette Loading Malfunction.  When the power is turned On without cassette EJ position, and LD-SW is monitored all the time if the CL or GC position is detected continuously for 1 second or more, the power shall be turned off, and the unit be Cassette Loading Malfunction.
COUNTERMEASURE FOR MECHANICAL MALFUNCTION
  • If the unit detects Mechanical Malfunction, turn the Power Off.  If the unit is Mechanical Malfunction, key input, except Power key shall be disabled, and cassette insertion disabled. When the Power Key is entered, the Power is turned On, and the unit switches over the Eject Mode.