Service manuals, schematics, eproms for electrical technicians
QSC DCA3022 SCH
AUDIO - SERVICE MANUAL
Type: (PDF)
Size
1.1 MB
Page
5
Category
AUDIO
SERVICE MANUAL
If you get stuck in repairing a defective appliance download this repair information for help. See below.
Good luck to the repair!

Please do not offer the downloaded file for sell only use it for personal usage!

Looking for other manual?
Document preview
QSC DCA3022 SCH service manual (1st page)
Preview of QSC DCA3022 SCH [1st page]
Click on the link for free download!
Document preview
QSC DCA3022 SCH service manual (2nd page)
Preview of QSC DCA3022 SCH [2nd page]
Click on the link for free download!
Please tick the box below to get download link:
  • If you have any question about repairing write your question to the Message board. For this no need registration.
  • Please take a look at the below related repair forum topics. May be help you to repair.
Warning!
If you are not familiar with electronics, do not attempt to repair!
You could suffer a fatal electrical shock! Instead, contact your nearest service center!


Note! To open downloaded files you need acrobat reader or similar pdf reader program. In addition, some files are archived,
so you need WinZip or WinRar to open that files. Also some files are djvu so you need djvu viewer to open them.
These free programs can be found on this page: needed progs
If you use opera you have to disable opera turbo function to download file!
If you cannot download this file, try it with CHROME or FIREFOX browser.
Translate this page:
Relevant AUDIO forum topics:
Torz Bartók rádió
Sziasztok! Nem régiben kaptam egy hibás harman/kardon tunert (TU912) rosszan, ha tudom csináljam meg magamnak. Úgy néz ki, hogy alapvetően működik a gépezet, de azt vettem észre, hogy a Bartók rádió torzan szól ha hangosabb zene szól éppen (de összehasonlítva nem hangosabb, mint más adó), a többi adónál nem észleltem a problémát sem előtte, sem utána a "skálán", ha monóra váltom a tunert akkor valamit javul a helyzet, de nem szűnik meg a torzítás így sem. Elsőre úgy tűnik mintha az adóval lenne a gond, de nem hinném, hogy akkor én lennék az egyedüli akinek ez feltűnik, egyébként Budapesten hallgatózok (105,3 MHz) és szabványos felépítésű 300Ohmos T-antennát használok. Mi lehet a gond?
Ford CD-132 fejegység bekötése
Sziasztok! A képeken látható készüléket kellene megjavítanom, de már a bekötésnél elakadtam. Adtam tápot a felső rész 4x4-es csati két érintkezőjére, de ez még kevés. A navi modul (középső rész) is kap tápot a két vastag érintkezőn. Amikor rákapcsolom a tápot van kb. 1A-es áramfelvétele, rendezgeti a CD mechanikát majd kikapcsol. Bekapcsolni nem tudom. Szóval még valahová várja a tápot vagy az ACC jelet. Ebben kérnék segítséget. Üdv.
ION Archive LP Turntable

This is a compact design to I guess transfer the vinyl into MP3 format.
Complaint was when the arm was moved the tt dont spin, confirmed that as
theres a leaf switch to sense arm movement,
and its fed to a main pcb with all the IC's that I guess handle all the
stuff. The switch is ok, and I remember seeing 14V or so on the motor pins
frm the PCB, so I figured perhaps theres anough current to spin the motor and
focused on testing the motor.

Manufacturer does not supply the mainboard that feeds the motor but
the motor can be taken apart and after I opened it and
disconnected the small pcb fron the motor terminals and apply power
directly, it spins w 12v. theres a small electrolytic cap on the pcb 25V / 22uF and an
AN6652 4 pin T0-220 type case IC that I guess is some kind of speed control
circuitry.

The drive Motor is an EG-530-SD-3F, main board is stamped K-13007.
Gonna check the cap, but after searching this IC and its
applications with the motor, I see its popular and some drawings show how its used to regulate the 78,33
and 45 rpm speeds.

This drawing looks pretty much what I see in there:
https://tectronelectronics.eu/images/thumbnails/465/465/detailed/31/eg530.jpg
 

I have replaced the IC and the cap, but the motor still does not turn. The main pcb

is proprietary and cant be purchased, and I think it is giving the op-amp IC a reference signal.

Is there a way to bypass that signal or fool the IC to believing its on to test it out?

Photo showing the motor pcb :
http://www.mediafire.com/view/s79blgku1503mtg/HPIM0643.JPG/file
Photo of motor under test:

http://www.mediafire.com/view/thhgvcwac8al7gu/HPIM0635.jpg/file

 

 

 

Philips FR-732/00 fluoreszcens kijelző
'comment-129308')); } ?>
Similar manuals:
If you want to join us and get repairing help please sign in or sign up by completing a simple electrical test
or write your question to the Message board without registration.
You can write in English language into the forum (not only in Hungarian)!

E-Waste Recycling