Service manuals, schematics, eproms for electrical technicians
RECEIVER EUROMAX EM777HD MAIN V1-3 20140910 S1506C 2018D2 SPI 25Q32 DUMP
Type: 
(RAR)
(RAR)Size
3.4 MB
3.4 MB
Page
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Category
OTHER
EPROM
OTHER
EPROM
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Good luck to the repair!
Please do not offer the downloaded file for sell only use it for personal usage!
Looking for similar receiver manual?
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RECEIVER EUROMAX EM-777HD MAIN V-13 EM777HD V13 20140910 S1506C 2018D2 SPI 25Q32 EM 777 HD 13 1506 2018 25 32 V1 V1-3
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Relevant OTHER forum topics:
Szervusztok!
Kis gondom akadt egy Veszprém adóvevővel. Nevezetesen az, hogy a zajzár sajnos nem akar működni. Az ominózus panelen (XE401-25) ahol a zajzár is található már az összes tranzisztort (nem kis gond árán miután germánium tranyók )és elkót kicseréltem, de a ZZ továbbra sem működik. Adás és vétel is van kifogástalanul, a vezérlőpanelen a kapcsoló is tökéletesen teszi a dolgát. Kérem, hogy aki behatóbban ismeri ennek a rádiónak a nem egyszerű lelki világát segítsen a probléma megoldásában.
Köszönöm.
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.
Sziasztok,üdv itt lesz egy pár kínai töltő elektromos járműhöz biciklihez
Aztat értem hogy áram, de mi hajcsa?
valami noname cd-rádió egyik oldala torzan szólt, szétkaptam , akkor elhalgatott. végfok IC CD2025, már majdnem kiszedtem, de gondoltam megnézem a csatoló kondikat. No egyiket megtaláltam a másik sehol (a helyén gyári átkötés), de az az oldal szólt!
Így már önnyű volt, kivettem a másik kondit (szóval azt az egyet)rövidzár berak,tökéletes tiszta hangzás, jobb mint újkorában.
Nem vagyok egy professzor, de talán Ti értitek hogy hogy is van ez.
Szép napot mindenkinek!