Posts by PWH (archived)
50 total posts44 results
Beogram failing to "see" records
in BeoGram · Apr 5, 2009 06:08Diode replaced, problem solved. Lets hope it stays that way. Thank you everyone!😁
Beogram failing to "see" records
in BeoGram · Apr 4, 2009 07:21I have now received the diode from Yachadem, Thanks. To be certain, before I replace, The black stripe is the cathode? and goes to the collector of the transistor? in the circuit snippet above.
Beogram failing to "see" records
in BeoGram · Mar 22, 2009 08:59Hi Menahem, I have plenty of 4148's but not the other type. Assuming they are cheap to post can I buy 2 from you? please send a PM with a price. Thanks
Beogram failing to "see" records
in BeoGram · Mar 22, 2009 06:32Thanks everyone. On the power transformer it says GR4002 type 5514. Attached is a picture of the underside. You can see the hole where the chassis screw went and broke the diode! Again the biro points to the position of …
Beogram failing to "see" records
in BeoGram · Mar 21, 2009 16:05Hi Its the one pointed to by the biro. The symbol on the underside is for a Zener
Beogram failing to "see" records
in BeoGram · Mar 21, 2009 13:07OK - I have now dismantled the deck and diode D 17 is physically broken. It was bent over the power transistor (presumably from manufacture) and moving the deck must have caused an impact! It is a BZX79 15V Zener 5%. The…
Beogram failing to "see" records
in BeoGram · Mar 6, 2009 10:03OK the sensor is producing an output back to the board under the deck. I notice the manual raise/lower switch will not lower the arm either. Where do I look next? Thanks
Beogram failing to "see" records
in BeoGram · Feb 18, 2009 14:57just to bump this up, does anyone know which wires to test for an output from the detector arm? Thanks
Beogram failing to "see" records
in BeoGram · Jan 31, 2009 04:39Well the problem has returned.There seem to be 4 wires coming out of the detector arm. The manual is not clear which provide the signal. could you advise which colour wires to test between and what sort of voltage to exp…
Beogram failing to "see" records
in BeoGram · Jan 24, 2009 08:55Problem was a bad connection to the solenoid. Re-soldering seems to have cured the problem
Repairs to a classic
in The Workbench · Jan 15, 2009 13:44Nearly there- Check the AGC line for resistors gone high- they usually do and leaky capacitors - even a tiny leak may kill the AGC - I haven't got the circuit so can't be sure, but if its the original capacitor it will p…
Beogram failing to "see" records
in BeoGram · Jan 11, 2009 15:48My 4002 which was working perfectly will no longer 'see' a record it just goes to the end (changing speed 1/2 way) then returns. I can clearly see the light on the sensor arm shining on the record and the B&O logo is ill…
Repairs to a classic
in The Workbench · Dec 7, 2008 04:38Off to the car boot sales then (if you have them in Denmark😁) Philips Radios used CBL1's a lot so they will have a matching transformer provided it is the right physical size. If you have no luck let me know and i'll se…
Repairs to a classic
in The Workbench · Dec 6, 2008 11:50I have never had a problem with these yet provided they are the correct rating for the job. They are available in various voltage ratings notably 160V & 400V they are all marked -160 is too low! Measure the DC voltage be…
Repairs to a classic
in The Workbench · Dec 6, 2008 07:10Hi Dillen, That 'little fellow' is renowned for frying transformers leaving the primary open circuit and destroying output valves for the reason you mention. I always replace it with at least 2x max voltage working of th…
Repairs to a classic
in The Workbench · Dec 5, 2008 15:03Hi Dillen can you check the output transformer? -does the circuit data sheet give ohmic values. sometimes the primaries burn out through layers but are still intact. does it get warm? Is there an old capacitor 'leaking' …
Repairs to a classic
in The Workbench · Oct 23, 2008 13:44I would attach at least 4m of aerial wire and a signal earth. have you missed any of the wax/electrolytic caps? sometimes they are in the IF cans Try moving the valves in their sockets, could be dirt . Check coils/wavech…
4002 will not advance on the record
in BeoGram · Sept 20, 2008 12:19Bulb replaced, diapragm adjusted, its very critical, and it no works perfectly. Thank you all for your help.
4002 will not advance on the record
in BeoGram · Sept 20, 2008 06:16Hi The lamp is blown, the manual is not very helpful describing 'housing with lamp' what is the voltage rating of the lamp? will one from the speed indicators do the job?
4002 will not advance on the record
in BeoGram · Sept 19, 2008 13:19I have now checked this deck out and all functions work, I have cleaned, lubricated the dropping mechanism cylinder and cleaned the running rails which were squeaky. Everything works except, the record gets stuck, (I hav…