Service manuals, schematics, eproms for electrical technicians
NATIONAL RF680L 1966 SCH
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AUDIO
SERVICE MANUAL
AUDIO
SERVICE MANUAL
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Looking for similar national manual?
Good luck to the repair!
Please do not offer the downloaded file for sell only use it for personal usage!
Looking for similar national manual?
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NATIONAL RF-680L RF680L 1966 RF 680
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Relevant AUDIO forum topics:
Netán valami középsugárzót mi jó bele?
Szép napot mindenkinek.
Szép napot mindenkinek.
Vettem egy Onkyo erősítőt. Hibája, hogy amikor a hálózatra kapcsolom nincs készenléti üzeme, nem lehet bekapcsolni. A segédpanel(stand-by) kimeneti feszültségei a 10és 12v meg vannak. Ahogy tovább mentem, a HDMI panelra pl. a D183 dióda után már nincs meg a 12v. Még a Q702, Q703 szabályzókat még nem mértem, de ha ezek is hibásak, akkor ezeket milyen tipussal lehet helyettesíteni? További segítséget, tippeket kérnék a javításhoz.
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
Tiszteletem!
Jófogáson vettem egy Kenwood KRF-V4060D rádiós 5.1 erősítőt.
Sajnos nincs hozzá magyar használati utasítás. Ha valakinek megvolna és feltöltené azt megköszönném?
Üdv,Sándor.
Köszönöm a segítséget! Google fordítóval lefordítottam ami nem volt érthető számomra.
Jófogáson vettem egy Kenwood KRF-V4060D rádiós 5.1 erősítőt.
Sajnos nincs hozzá magyar használati utasítás. Ha valakinek megvolna és feltöltené azt megköszönném?
Üdv,Sándor.
Köszönöm a segítséget! Google fordítóval lefordítottam ami nem volt érthető számomra.
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