Service manuals, schematics, eproms for electrical technicians
TEXAS INSTRUMENTS INTEGRATED CIRCUITS 1967
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16.1 MB
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375
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TEXAS INTEGRATED CIRCUITS 1967
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Relevant OTHER forum topics:
There is no service manual of the Yamaha KX-250, anyone? I have fixed the mechanism of this unit, replaced the capstan motor (bad quality shreeking one with a better one), replaced the belts and works perfectly fine. Perfect audio, everything works great. However after testing it many times I reassembled the unit and did another test. Some tick noise is present in the audio.
The tick noise is present when executing a function, for example REW (most worse of all), FF or PLAY (only a few spikes randomly), also when using the remote. It is not a problem of the mechanism (motor) or a ground issue or something like that, disconnected it and problem still exists. Maybe it has something to do with static electricity because I have used the unit without HEAD cables attached to the mainboard (head input pins floating) however the pre-amplification circuit is working fine except of the noise. There are two IC's in this circuit, UPC1330HA head selector and a LA3161 pre-amplifier.
The LA3161 is a 2-channel preamplifier that has a circuit to reject ripple. Is it possible this IC is damaged (because of a (static) spike) and because of that the ripple rejection is no longer working? When I replace this IC the problem is solved?
Any ideas or do have some people any experience with this or recognize the sound behaviour discription? Anyone who can point me into the right direction?
Many thanks for any reply.
The tick noise is present when executing a function, for example REW (most worse of all), FF or PLAY (only a few spikes randomly), also when using the remote. It is not a problem of the mechanism (motor) or a ground issue or something like that, disconnected it and problem still exists. Maybe it has something to do with static electricity because I have used the unit without HEAD cables attached to the mainboard (head input pins floating) however the pre-amplification circuit is working fine except of the noise. There are two IC's in this circuit, UPC1330HA head selector and a LA3161 pre-amplifier.
The LA3161 is a 2-channel preamplifier that has a circuit to reject ripple. Is it possible this IC is damaged (because of a (static) spike) and because of that the ripple rejection is no longer working? When I replace this IC the problem is solved?
Any ideas or do have some people any experience with this or recognize the sound behaviour discription? Anyone who can point me into the right direction?
Many thanks for any reply.
A hiba a képen látható, mi tévő legyek?A trafótól kezdve megsült a panel alkatrészek durrantak, javítható vagy csere?
Jól esne egy rajz mert a felismerhetetlenségig roncsolódtak az alkatrészek. Kérném a segítségeteket!
üdv.
üdv.az elektrotanya tagjainak .Érdeklődnék kaptam egy korg pa 60-as szintetizátort minden müködik ( kijelző a gombok is),de hangot nem ad ki . az erősitő része müködik .megköszönném ,ha valaki valami tippet adni.Köszönön
Sziasztok,
Midea MS9AU 09HRDN1-QRC8W beltéri egységének panelján a klíma táp IC-je ledobta a kalapját, beazonosításában kérnék segítséget.
Tippem van, talán TNY264 vagy TNY266, a kapcsolásból úgy néz ki.
Kérlek erősítsetek meg vagy cáfoljátok.
Köszönöm,
Üdv,
Gábor