Service manuals, schematics, eproms for electrical technicians
BELMONT RADIO CORP. 5D118 SCH
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(PDF)
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104.2 KB
104.2 KB
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3
3
Category
AUDIO
SERVICE MANUAL
AUDIO
SERVICE MANUAL
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Relevant AUDIO forum topics:
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
Jó napot tanyalakók!
A címben említett aparátussal lenne gondom.
Nagy alapzúgást generál bekapcsolás után. Hol keressem a bajt?(az audio téren nem vagyok annyira otthon)
Előre is köszönöm a válaszokat!
A címben említett aparátussal lenne gondom.
Nagy alapzúgást generál bekapcsolás után. Hol keressem a bajt?(az audio téren nem vagyok annyira otthon)
Előre is köszönöm a válaszokat!
Tisztelt kollégák!
Thomson AM1460 hifitorony (vagy hozzá nagyon hasonló készülék) használati utasítására lenne szükségem.
Akinek van,vagy tud bármilyen módon segíteni kérem küldje el vagy írjon a frkec@freemail.hu -ra.
Köszönöm szépen és jó estét mindenkinek.
Sziasztok.
Van 2db Dewalt DWST1-81078-QW rádióm. Mind a 2db csak logózik és újra indul.
Van rajta 2db SPI flas, az egyik EN25QH16 ez a bluetooth modulé szerintem, mellette van (TSTAK_Main_V10 panelen)
Van egy EN25QH64 ez van a STM32F032 mellett, ezen lehet a fő program (TSTAK_DPLY_V9, LCD panelen)
Van még egy 24C08 eeprom is rajta, ha jól emlékszem a típusra. Ennek hiányában sem indul. (TSTAK_DPLY_V9, LCD panelen)
Ezeknek kellene a mentése agy működőből.
Azt már megfyigyeltem hogy sima 25q64 és 25q16 használata az nem jó, nem tetszik neki a típus.
Van 2db Dewalt DWST1-81078-QW rádióm. Mind a 2db csak logózik és újra indul.
Van rajta 2db SPI flas, az egyik EN25QH16 ez a bluetooth modulé szerintem, mellette van (TSTAK_Main_V10 panelen)
Van egy EN25QH64 ez van a STM32F032 mellett, ezen lehet a fő program (TSTAK_DPLY_V9, LCD panelen)
Van még egy 24C08 eeprom is rajta, ha jól emlékszem a típusra. Ennek hiányában sem indul. (TSTAK_DPLY_V9, LCD panelen)
Ezeknek kellene a mentése agy működőből.
Azt már megfyigyeltem hogy sima 25q64 és 25q16 használata az nem jó, nem tetszik neki a típus.
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