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ARCHIVED FORUM -- April 2007 to March 2012
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This is the first Archived Forum which was active between 17th April 2007 and
1st March February 2012
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Hi I would start by cleaning the tone control pots. Take them apart and clean the carbon track very gently, clean the contact track from any oxidation and clean the "fingers" that touch the tracks from oxidation. Then put some contact cleaner on the tracks to protect them. Reassemble. /Fredrik
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Hi To attach a picture - select reply, on top of "the old message" select the options tag and select Add/Update. There is a limit of file size at 100kB. /Fredrik
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Hi Do you get sound with the 4pin speaker link? /Fredrik
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The idle current of the output amplifier is 50mA or 22mV across the resistors R143,R144 (Rch) and R243,244 (Lch) /Fredrik
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Hi It's normal that the motor is running (and the capstan shaft in your picture) when not in stand-by mode. /Fredrik
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Hi Mathieu Nice work - it's starting to wake up I'm curious of what had happened to the output amplifier. Please tell me when you find out. Maybe some photos of the damage? /Fredrik
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Hi Nice that it's working again. Good luck!!! /Fredrik
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Hi Sorry to say, but you might have damaged the lens. Just clean lenses with a dry cotton tip, never use alcoholics or any strong solutions. This can damage the plastic lens beyond repair. Take a look at your lens at a close distance to see if it's still glass clear. /Fredrik
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Hi Check that you have all the voltages on module 16. On my unit the 6.5v was out of spec and it's controlled by the trimmer R4. Also check the uC-supply on module 6 - it will feed the microcontroller with 5v at pin 40 (ic4 on mod 2). This auxillary supply is fed from the 15v of mod16. You will not get any 5v p-p on collector of tr4 mod16 if the
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Great thread Martin!!! It's interesting to see the how the work progress in this thread. Keep it up!!! /Fredrik