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ARCHIVED FORUM -- March 2012 to February 2022
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This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022

 

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  • Re: BeoLab 8000 - Loose RCA jack

    [quote user="dbfrancis1943"] Anyone know how I can attach a photo? [/quote] Hi, see the Wiki where Soren Mexico did two entries about uploading pics and using them in a post: Uploading Pics Posting Pics Hope that helps
    Posted to The Workbench (Forum) by RaMaBo on Sat, Feb 19 2022
  • Re: Bang Olufsen Century not turning on

    If IC1 doesn't get 5V at Pin 16 you could check the fuse F6 at the 6.2V zener diode (both position 6D) for continuity (zero ohms). If this fuse is blown the µP doesn't get the standby 5V but then there's something else which caused the blown fuse.
    Posted to The Workbench (Forum) by RaMaBo on Sat, Feb 19 2022
  • Re: Bang Olufsen Century not turning on

    You are looking at the wrong place. This place is active when the century is switched on but for the standby supply you have to look around IC3! At P9-2 and P9-2 you should always get an AC voltage of around 14V! This will be rectified with the 4 diodes and the resulting DC voltage will be smoothed with C42. This is the raw supply voltage for IC3 at PIN 8. IC3 should be active in standby, controlled via PIN2. If the IC3 is functioning _and_ active you should get the 5V Standby at R37 (47 Ohms). The
    Posted to The Workbench (Forum) by RaMaBo on Sat, Feb 19 2022
  • Re: BeoLab 8000 - Loose RCA jack

    [quote user="dbfrancis1943"] Anyone know how I can attach a photo? [/quote] Hi, see the Wiki where Soren Mexico did two entries about uploading pics and using them in a post: Uploading Pics Posting Pics Hope that helps
    Posted to The Workbench (Forum) by RaMaBo on Sat, Feb 19 2022
  • Re: Bang Olufsen Century not turning on

    If IC1 doesn't get 5V at Pin 16 you could check the fuse F6 at the 6.2V zener diode (both position 6D) for continuity (zero ohms). If this fuse is blown the µP doesn't get the standby 5V but then there's something else which caused the blown fuse.
    Posted to The Workbench (Forum) by RaMaBo on Sat, Feb 19 2022
  • Re: Bang Olufsen Century not turning on

    You are looking at the wrong place. This place is active when the century is switched on but for the standby supply you have to look around IC3! At P9-2 and P9-2 you should always get an AC voltage of around 14V! This will be rectified with the 4 diodes and the resulting DC voltage will be smoothed with C42. This is the raw supply voltage for IC3 at PIN 8. IC3 should be active in standby, controlled via PIN2. If the IC3 is functioning _and_ active you should get the 5V Standby at R37 (47 Ohms). The
    Posted to The Workbench (Forum) by RaMaBo on Sat, Feb 19 2022
  • Re: BeoGram CD 6500 datalink issue ??

    What Alf says is: connecting the BG CD Datalink to BM TP1 Pin 7 he can control the BG CD. At least what i can see from the circuit diagramm. The datalink bus 1 for TP1 / CD is connected to Pin 6 _and_ 7 for CD and to Pin 7 for TP2. The same applies for datalink bus 2 and TP2 / PHONO. But it doesn't help to locate the error, ecept when the BG CD can not be controlled via beolink remote when the DIN connector is properly wired. Then there's a problem with the CD socket of the BM. The PHONO
    Posted to The Workbench (Forum) by RaMaBo on Tue, Feb 15 2022
  • Re: Bang Olufsen Century not turning on

    Hi, you should check if there's the Standby Supply of 5V. This voltage is used by the microprocessor to scan the keyboard and sitsching the relay on or off. So check across the 1000 µF capacitor (position 3B) if you get ~5V. The negativ connection of the capacitor is connected also to the middle pin of P3 which is ground for all the voltages. Also on P4 you should measure around 5V. The IC3 is the standby voltage regulator giving the 5V standby voltage. The relais is always connected to
    Posted to The Workbench (Forum) by RaMaBo on Tue, Feb 15 2022
  • Re: BeoGram CD 6500 datalink issue ??

    What Alf says is: connecting the BG CD Datalink to BM TP1 Pin 7 he can control the BG CD. At least what i can see from the circuit diagramm. The datalink bus 1 for TP1 / CD is connected to Pin 6 _and_ 7 for CD and to Pin 7 for TP2. The same applies for datalink bus 2 and TP2 / PHONO. But it doesn't help to locate the error, ecept when the BG CD can not be controlled via beolink remote when the DIN connector is properly wired. Then there's a problem with the CD socket of the BM. The PHONO
    Posted to The Workbench (Forum) by RaMaBo on Tue, Feb 15 2022
  • Re: Bang Olufsen Century not turning on

    Hi, you should check if there's the Standby Supply of 5V. This voltage is used by the microprocessor to scan the keyboard and sitsching the relay on or off. So check across the 1000 µF capacitor (position 3B) if you get ~5V. The negativ connection of the capacitor is connected also to the middle pin of P3 which is ground for all the voltages. Also on P4 you should measure around 5V. The IC3 is the standby voltage regulator giving the 5V standby voltage. The relais is always connected to
    Posted to The Workbench (Forum) by RaMaBo on Tue, Feb 15 2022
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