Service manuals, schematics, eproms for electrical technicians
JVC KD-75A CASSETTE DECK
Type: 
(PDF)
(PDF)Size
6.0 MB
6.0 MB
Page
36
36
Category
AUDIO
SERVICE MANUAL
AUDIO
SERVICE MANUAL
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- Also known:
JVC KD-75A CASSETTE DECK KD75A KD 75 75A
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Relevant AUDIO forum topics:
Szervusztok!
A CD-játszó alaplapjáról hiányzik az R702 és a D704 poz. számú alkatrész. Az ellenállás 2,2Ohm, az már rendben, de a diódát nem tudom milyen volt. Próbáltam hasonlatosságot keresni a DX-MX70 torony lejátszójával. Abban van egy dióda ami a rajzolat (szitanyomás)szerint normál dióda, ám az alkatrész listán 5v1 zenerként szerepeltetik. Valami 2B felirat van rajta -nem forrasztottam ki- azonosítani nem tudom. Adnék egy esélyt ennek a szerkezetnek, mert maga a drive átépítve hibátlanul működik. Ebben kérem segítségetek.
Köszönettel: Bencsik
Given:
Victor TT-71, neon lamp does not light, speed is lower than normal. This is subsequent some short circuit the owner does inside the device. No further details.
I found out the VICTOR QL7 have the same motor driver amd I downloaded the service manual that I attached here in case this manual is not already uploaded.
Looking at the diagrams I found out that at TP3 (same with pin5 of IC803) instead if that rectangular signal, I have nothing but 5VDC and a negative or positive short spike whenever I'm starting or stopping the motor and
Under the circumstances I suspect IC803 is defective. The bad thing, IC803 is NPC SC8043. Also I wonder if the crystal is fine (except that I wonder what can be wrong with a crystal after some short circuit).
Does anybody have any more suggestion?
Also, where can NPC SC4043 be sourced? Also, a crystal 9.054MHz?
Thanks in advance,
Corneliu
Victor TT-71, neon lamp does not light, speed is lower than normal. This is subsequent some short circuit the owner does inside the device. No further details.
I found out the VICTOR QL7 have the same motor driver amd I downloaded the service manual that I attached here in case this manual is not already uploaded.
Looking at the diagrams I found out that at TP3 (same with pin5 of IC803) instead if that rectangular signal, I have nothing but 5VDC and a negative or positive short spike whenever I'm starting or stopping the motor and
Under the circumstances I suspect IC803 is defective. The bad thing, IC803 is NPC SC8043. Also I wonder if the crystal is fine (except that I wonder what can be wrong with a crystal after some short circuit).
Does anybody have any more suggestion?
Also, where can NPC SC4043 be sourced? Also, a crystal 9.054MHz?
Thanks in advance,
Corneliu
Üdv !
CD-k belvilágában jártas kollégák segítségét kérem !
A tárgybani készülék kb.3 évig nem volt bekapcsolva,a CD kivételével minden funkciója tökéletesen működik ,pupos kondit nem találtam.
CD -t behelyezve 1-et forgat a motor és " no disc " üzenettel leáll . Optikát tisztítottam ,fejkábelt megmozgattam,de azt hiszem nem itt kell keresni a hibát !
Köszönöm a segítséget !
Tisztelettel : Balta István
CD-k belvilágában jártas kollégák segítségét kérem !
A tárgybani készülék kb.3 évig nem volt bekapcsolva,a CD kivételével minden funkciója tökéletesen működik ,pupos kondit nem találtam.
CD -t behelyezve 1-et forgat a motor és " no disc " üzenettel leáll . Optikát tisztítottam ,fejkábelt megmozgattam,de azt hiszem nem itt kell keresni a hibát !
Köszönöm a segítséget !
Tisztelettel : Balta István
JVC SP-PWA9 tipusú erősítőhöz keresek kapcsolási rajzot, a hiba jelenség: nem szól!
Az erősítő bonyolultsága miatt elég nehézkes lenne javítani rajz nélkül, ha netán valakinek megvan és át tudná küldeni , megköszönném! Az erősítőhöz tartozik egy DVD lejátszó is, tipusa:XV-THA9R
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