Hello.
A Teac VRDS-25X CD player (from Japan, 100 volts) was mistakenly plugged into a 220 volt outlet.
After plugging into the outlet, there were clicks of switching on, the same as when turning on any other Japanese equipment (through a transformer, of course).
After that, no manipulations with the player were made. The power button did not turn on.
After the subsequent switching on through the transformer 100 to 220 volts, the player does not show signs of life. The power button does not turn on the player.
(The power button on this model is not fixed when pressed).
There are no visible traces of burnt or damaged parts inside. Fuses are intact (visually).
Tell me, please, how to check where the malfunction is and what breakdown options can be?
I would be grateful for any advice.
The Teac VRDS-25X schematic is on this site:
https://ia601000.us.archive.org/32/items/manual_VRDS25X_SM_TEAC/VRDS25X_...
https://elektrotanya.com/teac_vrds-25x_sm.pdf/download.html
Hello!
What type of ballast transformer did you use? Phase splitter or autotransformer? Can you measure the outputs of the device's transformer? If you don't measure AC voltages there, the thermal fuse in the transformer is probably broken. Unfortunately, there are unstabilized voltages from the power supply. If these were given a double multiplier, it could destroy the circuits.
Gábor
0
/media/ko/4/cd/elekrotanya/11.png
0
Hello Gábor.
Thank you very much for your response!
I don't know what type of transformer (100 to 220 volts) was used when connecting the CD player. There is a photo of the transformer panel (sorry, poor quality photo).
This transformer has always been successfully used to connect Japanese techniсs (100 volts).
We measured the voltage at the outputs of the power transformer of the CD player with the mains power turned on. There is no voltage at the output (the tester showed a voltage of about 100 volts at the input).
Unwrapped the transformer. Inside it is completely filled with epoxy, so there is no way to get to the thermal fuse.
Its technical parameters are not indicated on the transformer, and the marking is probably clear only to its manufacturer (I attach a photo).
The Japanese corporation Teac replied to my letter that they do not provide technical information and cannot help with components for old models of CD players that are no longer in production.
Repairmen in Japan say that in situations like this, they take parts from a broken model of the same CD player.
But Teac VRDS-25X, even in a faulty state, are sold expensively in Japan.
It is possible that similar transformers are used on cheaper versions of the VRDS series players. But how do it know? The Teac VRDS-25X wiring diagram does not pointed the characteristics of the transformer.
I would be grateful for any help.
Julia
0
Hi!
Unfortunately, I cannot view the picture, the link is not live.
I recalculated the secondary AC voltages from the schematic diagram. You need a transformer that has 2x11V, 2x7V, 2x3V and 1x29V AC output. If you manage to find something similar, it could be used to repair the device. But the 2x3V output still needs to be handled with care. A series resistor must be inserted in one of the wires and the correct heating voltage must be set with it. Otherwise, the VFD will be destroyed.
I don't know if similar TEAC players have a similar transformer. You can always determine whether it is good or not from the circuit diagram of the given type or from the specific measurement.
Good luck!
Gábor
0
Hello Julia,
However it is completely filled with epoxy, I would try remove it,and as a reverse engineering count the wounds.
If you're lucky,maybe the thermal fuse is visible.There are many secondary coils.One for the VFD display filament AC voltage around 3V,30 V for VFD anode,2*5V for digital circuits,2*10 V for audio circuits.Possibly old Hifi VCR' s has this kind of transformer,with same voltages.But its more elegant to wind the coils,remanufacturing the transformer.
Good luck to repair.
TJ
1