Service manuals, schematics, eproms for electrical technicians
YAMAHA YST-SW800 PSU SCH
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POWER-SUPPLY
SERVICE MANUAL
POWER-SUPPLY
SERVICE MANUAL
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YAMAHA YSTSW-800 YSTSW800 PSU YSTSW 800 YST SW800 YST-SW800
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Relevant POWER-SUPPLY 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.
Jo reggelt a Tanyasoknak. Egy ismerosom hozta a cimbeli elektromos zongorat azzal, hogy meghalt. A kulso tapja mukodik. Kismillio csavar kicsavarasa utan a tap-panelen tudtam merni, a 12v tapfesz eljut a FT101 source labara, es.... ennyi. Rovidzar nincs, bizti jo. Nemigazan ertem ennek a tapnak a mukodeset, egy sima atereszto stabilizatorra hajaz, de a TR101 honnan kap delejt, hogy a FT101 gate labat testre huzza? SM a Tanyan. Koszonom az oktato hozzaszolasokat.
Bonjour
Je possède un Electone MC-600 sur lequel je constate
depuis hier que la section "Arpèges"ne fonctionne plus,
quel que soit le rythme sélectionné, et malgré les touches
"Arpegio Chord" et "Ensemble" activées, le volume des
arpèges étant également au maximum.
Auriez-vous une idée pour remédier à ce problème?
Peut-on effectuer un "Reset" sur cet orgue?
Merci d'avance pour votre aide....
Cordialement
Mecaso
**************************************************************************************
Hello
I own an Electone MC-600 on which I notice since yesterday
the "Arpeggios" section no longer works, regardless of the
rhythm selected, and despite the keys "Arpegio Chord" and
"Ensemble" activated, the volume of the arpeggios also being
at maximum .
Do you have an idea to fix this problem?
Can we perform a "Reset" on this organ?
Thank you in advance for your help....
Cordially
Mecaso
Je possède un Electone MC-600 sur lequel je constate
depuis hier que la section "Arpèges"ne fonctionne plus,
quel que soit le rythme sélectionné, et malgré les touches
"Arpegio Chord" et "Ensemble" activées, le volume des
arpèges étant également au maximum.
Auriez-vous une idée pour remédier à ce problème?
Peut-on effectuer un "Reset" sur cet orgue?
Merci d'avance pour votre aide....
Cordialement
Mecaso
**************************************************************************************
Hello
I own an Electone MC-600 on which I notice since yesterday
the "Arpeggios" section no longer works, regardless of the
rhythm selected, and despite the keys "Arpegio Chord" and
"Ensemble" activated, the volume of the arpeggios also being
at maximum .
Do you have an idea to fix this problem?
Can we perform a "Reset" on this organ?
Thank you in advance for your help....
Cordially
Mecaso
Sziasztok!
Yamaha PSR 210/310 billentyűzet alatti nyomtatott kontakt fólia kellene nekem.
Hozzám került egy PSR 210, valaki korábban megtépte a fólát, mint a képen is létható,
majd ezt követően egy primitív javítási móddal próbálkozott.
Feltételezem, hogy csak elkoszolódott a billentyűzet, esetleg belefolyt valami, innen indulhatott a javítási kisérlet.
A hangszernek a DEMO dalai szólnak, azt gondolom, hogy ezenkívűl max még a bill. vezérlő procival lehet esetleg gond.
Szeretnék mindenképp a végére járni a dolognak, de a Yamaha szerviz olyan áron tudná szállítani az alkatrészt, hogy annyit már a
működő hangszer sem ér. Ha tudtok valakit akinek bontásból használt lenne nagyon megköszönném.
A fólia a szerviz manualban "60" számú alkatrész cikkszáma: VQ 003600 2003 gyártású 61 billentésérzékeny billentyű.
üdv: lkyamaha
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