I need an output transformer for a Blaupunkt 627727 car radio. A build drawing would help me wind one. This is an old radio

Switch faulty maybe. Do some cjecks.

Hello, I need help to unlock an old car radio Blaupunkt cambridge sqm 39. Does anyone know how to get the code?

CODE 6781

This is an old radio that cannot be decoded by Serial Number

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If they cannot help then try your Main Dealer or a Radio Decoding Service

Doing a resistance test on a transformer will not give the information you require as you will read very little, if any resistance. What you need to do is an impedance check and that gets involved. If it is a normally wound transformer, not an auto transformer, you can isolate which is the primary and the secondary windings. Unless the transformer is a multi voltage input unit, the primary side will have continuity through only two terminals. The secondary could be more than two if it is a multi output voltage one. If the transformer is a step down, the primary windings will be the thinner wired windings and vice-versa. To actually test the transformer, get hold of a transformer with about a 20 vac output and try it across the two terminals you have identified as the primary windings, you should ge a proportional voltage of the actual output. eg. with 20 vac input and a 2 vac reading at the secondary, the actual output would be 11 vac if your mains voltage is 110 volts. Take care that you are using the transformer at the voltage it is designed for, otherwise it will overheat and burn out.

blaupunkt doesn't supply parts after ten years on their decks. you can try salvage yards.

It is 9v and 4.25v, measured from a working transformer in the clock radio

If you can check ohms,you can also read volts. Open the radio again and look for DC volts on the rectifiers capacitors.They look like :cans", normally the color is blue. Check for positive dc v. against chassis ground. If no + tension,your rectifier or your secondary are open.

please my name is dele i have this BOSE radio/cd system model number is AWRC2G which transformer burnt out rightly, that the input is 240volts which output is the problem and in nigria. please i just want to know the output on each coloured wire of the secondary that has 8 wires output from the secondary (2 purple - brn = volt, 2 blue = volts, and 2 black - gray = volts. so that similar that i can use to work it.
thank you

bad transformers try radio shop hi end shops for parts ok