Service manuals, schematics, eproms for electrical technicians
JVC RX-7042S
Type: 
(PDF)
(PDF)Size
4.9 MB
4.9 MB
Page
57
57
Category
AUDIO
SERVICE MANUAL
AUDIO
SERVICE MANUAL
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- Also known:
JVC RX-7042S RX7042S RX 7042 7042S
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Relevant AUDIO forum topics:
Se trata de fallo localizado en placa E1205777-005 los elementos c1041 c1042 c1043 c1044 de valor 47 mF 25V los cuatro en mal estado y IC 612 e IC611 corroidos por acido de los condensadores electroliticos, me es imposible leer los valores de los mismos ; Y en el diagrama no figura la placa del receptor RX- 1010 JVC. Codigo placa según diagrama
E 12057-005
Alguien podria por favor ayudar a localizar los valores de estos transistores.
E 12057-005
Alguien podria por favor ayudar a localizar los valores de estos transistores.
Jó ebédet az étvágyhoz:
Keresem ennek a készüléknek a rajzát, eddig csak fizetőst találtam.
Holnap hozzák, CD el sem indul.
Bálint
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
Szervusztok!
A címbeli egység hűtésével bajlódom. Pontosabban helyre kellene állítani a ventilátor vezérlését. Az alaplap ENH-213 jelű és a rajta lévő rommá égett R720 poz.számú ellenállás értékére, vmint a D720 poz.számú zener típusára lenne szükségem. Ez utóbbi láthatóan cserélt, a panel alján - bizonnyal egy "ügyes kezű pákász" által - vele párhuzamba kötött 20Ohm, 1/8W-os ellenállás volt. Ezért a ventilátor a bekapcsolást követő második perctől teljes fordulaton jár.
Az általam elért CA-MXG7BK SM. éppen csak ezt az egységet nem tartalmazza.
Segítő szándékotok megköszönném.
bencsik
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