Service manuals, schematics, eproms for electrical technicians
BOSS OD-1 OD-2 GUITAR EFFECT PEDAL SCH
Type: 
(PDF)
(PDF)Size
4.2 MB
4.2 MB
Page
22
22
Category
AUDIO
SERVICE MANUAL
AUDIO
SERVICE MANUAL
If you get stuck in repairing a defective appliance download this repair information for help. See below.
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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 boss manual?
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- Also known:
BOSS OD-1 EFFECT PEDAL OD1 OD2 GUITAR OD OD-2
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Relevant AUDIO forum topics:
Keresem panasonic sa-he75 házimozi erősítő rajzát
Segítséget előre is köszönöm.
Sziasztok!
A tuner szépen fog minden FM állomást maximális jelszinttel, de nem jelzi ki a displayen hogy STEREO, ezert az automatikus kereséskor nem talál semmit, vagy a beprogramozott adok scanjénél se áll meg sehol sem mert az a sztereo jelzesre áll meg.
Van egy NULL mérô tesztpont ott 0V-ra állítottam be a T21-es tekerccsel.Vettem már sajnos KF IC-t is (LM1851N) bele de nem az a hibás, a tápja (B+) 13.7V ez egy 83ohmos ellenallason megy az IC pin3-ra (Vcc) az pedig 11.3V helyett csak 9V. Elkók mérve jók.NYAK szakadas nincs.
Az AM-en egyáltalán nem fog semmit, de ugyemlékszem a gazdája azt mondta már olyan is volt elotte.FM-et pedig halgatta majd kiment a szobabol es mire visszajott nem volt sztereo vétel. Muszerezettsegem nincs rádiókra, csak oszciloszkópom van.
Sziasztok,
Harman kardon soundsticks III került hozzám. Végfok hibával. A végfok TDA8561Q.
Sajnos rajzom nincs hozzá.
A problémám hogy nem tudom szólalásra bírni.
A végfok IC-t kiforrasztvan a végfok IC 14 es láván 0V-ot mérek ami azt jelenti ha jól tudom, hogy készenléti állapotban van.
A végfok csere után kimenetein nincs fesz a 14 es láb kivételével minden jónak tűnik.
Ha berakom az IC/t akkor is ez a helyzet.
Tápok rendben, az IC lábain mérem a bemenő jeleket ha adok rá.
A 14 es láb feszültségét egy tranzisztor húzza le földre. A tranzisztor jó. Bázisán 0,66V.
A panelen nem lehet látni mi mivel van összekötve csak pár alkatrészt.
Ha valaki találkozott már ezzel a csodával, vagy van ötlete esetleg rajza azt megköszönném.
Üdv.:
Gy
I have and found most of the voltages as indicated on the circuit diagram, till op amp M 5218P; are near those specifed. The output on the centre of the two power transistors of both the channels are also alright.
While looking at the voltages on test points as mentioned on the page 7 for setting up quiscent current, these cannot be set.
Bit of history, the amplifier was lying unused for long time. Nothing in it has burnt. It was never opened earlier than this time, couple of days back.
While looking at the voltages on test points as mentioned on the page 7 for setting up quiscent current, these cannot be set.
Bit of history, the amplifier was lying unused for long time. Nothing in it has burnt. It was never opened earlier than this time, couple of days back.
While I was probing for voltages with DMM, with probe on collector of TR413 one of the fuses blew up. Later same thing happened on the other channel as well.
With the above as background can a Good Samaritan figure out feasibility of repair.
i am unable to upload service manual as file size is 7.3 mb
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