Home › Forums › Product Discussion & Questions › BeoCord › Beocord 5000 Type 49xx no sound
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9 May 2023 at 07:48 #46503BRONZE Member
Tape mechanism works but record/play relay fails to pick when play pressed, so no sound.
Location: Perth Western Australia10 May 2023 at 00:50 #46504TJames1901
BRONZE MemberHave you opened the player up?
10 May 2023 at 06:29 #46505Dillen
ModeratorThe record/playback relay should only draw when record is pressed.
Do the VU-meters react while playing a tape?Martin
11 May 2023 at 07:34 #46506BRONZE MemberThanks, Dillen.
From the circuit I thought RL101 needs to pick for play.ย No, nil display on VU’s when recordedย tape running.
Location: Perth Western Australia11 May 2023 at 07:38 #46507BRONZE MemberThanks, TJames for your reply.ย Yes, opened and replaced a number of darlingtons in circuit around RL101.ย No VU’s on recorded tape.ย No change on micro pin 36 !REC.
Location: Perth Western Australia11 May 2023 at 18:48 #46508Dillen
ModeratorCheck the supply voltages to the Dolby ICs.
Particularly the Vref (a dead C2 wouldn’t be a first).Martin
16 May 2023 at 11:08 #46509BRONZE MemberThanks,ย this deep electronics is daunting for an old bloke!ย ย But B&O have made any servicing a delight!
I will check voltages around the Dolby ICs.
And your suggestion of Vref will be done, too.
davidross
Location: Perth Western Australia22 May 2023 at 13:58 #46510BRONZE MemberSorry for delay in answering, Martin!ย Thanks for the leads.
Checked all voltages including 14a around Dolby board.ย All present.ย But worst possible result for fault – after reassembly it works perfectly!!ย Tested now with many tapes both in playback and record.
Guess I just wait for something to show up some day … sigh
Location: Perth Western Australia22 May 2023 at 14:11 #46511BRONZE MemberNew thread:ย what is best solvent to remove the gunk left by perished belts in tape drive??
Location: Perth Western Australia22 May 2023 at 21:40 #46512Dillen
ModeratorNew thread: what is best solvent to remove the gunk left by perished belts in tape drive??
IPA.
(Isopropanol alcohol, that is. – Not the beer).Martin
24 May 2023 at 01:49 #46513BRONZE MemberThanks, martin.ย But I need to buy some gloves first, because NOTHING gets the awful stuff off your skin!
David
Location: Perth Western Australia -
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