Service manuals, schematics, eproms for electrical technicians
BRAUN CD3 SERVICE MANUAL
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(ZIP)
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6.6 MB
6.6 MB
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Category
AUDIO
SERVICE MANUAL
AUDIO
SERVICE MANUAL
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Good luck to the repair!
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Relevant AUDIO forum topics:
Hi All,
I have a Rotel RA-980BX amp with a blown channel. I have sourced most of the transistors, but am struggling to find the other 4.
Part numbers as follow:
2SC3478
2SC4381
2SA1376
2SA1667
What would be suggested equivalents / suitable replacements?
Also, some advice, I suspect the bias pot to be bad. Based on the circuit, would you think that the bad bias pot would cause the drivers and outputs to blow? Any suggestion on modification to prevent this re-occurring?
Thanks
Regards,
Werner
I have a Rotel RA-980BX amp with a blown channel. I have sourced most of the transistors, but am struggling to find the other 4.
Part numbers as follow:
2SC3478
2SC4381
2SA1376
2SA1667
What would be suggested equivalents / suitable replacements?
Also, some advice, I suspect the bias pot to be bad. Based on the circuit, would you think that the bad bias pot would cause the drivers and outputs to blow? Any suggestion on modification to prevent this re-occurring?
Thanks
Regards,
Werner
Sziasztok,
Adott acímben szereplő házimozi erősítő amiben tönkre ment egy pár alkatrész.Ezek közül a 2sb1369-et nem kapok a hq elektronikánál (onnan szoktam rendelni). Abban kérem a helpet hogy ezt honnan tudnám beszerezni (nem horror áron), vagy ha van helyettesítője akkor annak típusát megköszönném. Találtam egy 2sb1370-et. Az adatok szerint ez is jó lehet...vagy nem?
Üdv.
Kicseréltem a meghatókat az MJE340/MJE350 párosra, a véget 2SC5200/2SA1943 párosra és még 2db 10A-es bizti aztán indult is. Mindenkinek nagyon köszönöm a segítséget!
Szép napot!
Adott acímben szereplő házimozi erősítő amiben tönkre ment egy pár alkatrész.Ezek közül a 2sb1369-et nem kapok a hq elektronikánál (onnan szoktam rendelni). Abban kérem a helpet hogy ezt honnan tudnám beszerezni (nem horror áron), vagy ha van helyettesítője akkor annak típusát megköszönném. Találtam egy 2sb1370-et. Az adatok szerint ez is jó lehet...vagy nem?
Üdv.
Kicseréltem a meghatókat az MJE340/MJE350 párosra, a véget 2SC5200/2SA1943 párosra és még 2db 10A-es bizti aztán indult is. Mindenkinek nagyon köszönöm a segítséget!
Szép napot!
DELTA W-400 MUSIC CENTERHEZ KERESEK KAPCSOLÁSI RAJZOT.
KÖSZÖNÖM.
Hello, I am in the process of repairing the Mackie ProFX12 V2 mixer for a client, and am running into the unavailability of schematics. Does anyone have a copy they could share? I have already reached out to Mackie directly but am still waiting for a reply.
Additionally, I am having trouble identifying the failure mode for the two channels that have failed: one produces loud static (indicating bad op-amp or feedback resistor perhaps?) and the other has the right channel producing a 60hz hum, the other is functional. (see board photos, with the two failed channels being marked with "F". The browned area is residual flux from having replaced two opamps, and having reflowed other components around them)
Any help on either of these fronts would be invaluable. I have mainly worked in laptop and computer repair, and am just getting started with my first scope and first set of board level repairs.
Additionally, I am having trouble identifying the failure mode for the two channels that have failed: one produces loud static (indicating bad op-amp or feedback resistor perhaps?) and the other has the right channel producing a 60hz hum, the other is functional. (see board photos, with the two failed channels being marked with "F". The browned area is residual flux from having replaced two opamps, and having reflowed other components around them)
Any help on either of these fronts would be invaluable. I have mainly worked in laptop and computer repair, and am just getting started with my first scope and first set of board level repairs.
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