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Panasonic nv-hs 1000 ecp videomagnó nem fog bekapcsolni

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gianluca

Helló mindenkinek,miután próbáltam bekapcsolni a teszt üzemmódot, (a szerviz üzemmódban) a videomagnó kikapcsol, és nem fog bekapcsolni.
Megpróbáltam rázni a tápegységet, így a szabályozatlan áramlás jelen van, de semmi sem történik. Mit tudok tenni?Köszönöm a segítsége :Boldog:

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Edmundson
Edmundson's picture

Hi gianluca!

Sorry, but I don't understand the right issue.
So when you started the repair process the unit switched on normally, but when yo entered in the service or test mode the unit switched off and since then does not switch on. Is it right?

If you have under voltage on the non switched pins of the SMPS disconnect it from the main board and measure them without load. If the issue persist you have to repair the SMPS first. Check the rectifier diodes on the secondary side and the electrolytic caps. The caps made in Japan has no visible signs on the top, so you must remove them and check the ESR, but is better to change them. When the SMPS works fine (the output voltages are correct) connect it back to the unit and measure the voltages again. If the voltages are ok, you can continue to repair the original issue. If the voltages drops down again probably there is an overload on the non switched line.

I was wondering, what should happened if you shorted the +5V to the GND. In that case the IC1504 may be internally destroyed. That IC’s input is routed to the line where the 5V regulator of the NON SW +5V is routed too. So the issue can cause by the broken IC1504 too.

Br.

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gianluca

ok i try to explay better, so i try to switch test mode and service mode, together (short pin tp6010 to tp6011 and short the cut jumper wire near ic6001, like in image that i've upload) but the vcr power off with no led/light indication.
I think the combination of bot makes the short of 5v. I've check the voltage in the collector (6,3v) and base (6,1v), in the power supply and is ok. Can you tell me where is IC1504?
many thanks for your fast reply.

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Edmundson
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Hi,

IC1504 is a linear voltage regulator located on the top of your schematic. I'm not sure that the position number is correct, because is not clearly readable.

" I've check the voltage in the collector (6,3v) and base (6,1v), in the power supply and is ok."
This is interesting. In that case the emitter voltage must be 5,4V. If there is 1,5V only than the transistor is damaged.

BR.

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gianluca

yes, now it works, after complet recap of power supply, and replace the transistor that i found burnt. Thank you again, especially for your patient.
Best regards, and don't try to engaged test+ service mode ;)

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Edmundson
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Hi!

You're welcome and gongratulation!

BR

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gianluca

i upload the schematic of this power supply, it's the same for panasonic nv-hs800/ ag-4700/nv-hs1000

File csatolás: 

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gianluca

ok so i write in english, i hope you understand me. I have check all the voltage of the power supply, the pin 11-12 gives 1,5v instead of 5,3v. i have uploaded the voltage chart.
This videorecorder, don't have opto-electic sensor, because i keep the case open when it was working.
I don't want to change forum, because i like elektrotanya, and is the best on the internet.

File csatolás: 

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Edmundson
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Hi,

"This videorecorder, don't have opto-electic sensor, because i keep the case open when it was working."

All VCRs has opto-sensors to determine the begin and the end of the tape, the position of the cassette holder (in some WCRs there is a push button), rpm of the reels, ect. These sensors are sensitive to the normal ambient light too. If all of the sensors receive light at the same time the unit goes off one's head. To prevent this you have to work in the semi dark environment. The service or the test mode may disable the tape ends limit opto’s and you can work in the strong light too.

BR

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Jaca
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Hi,

There is non switched (continous) 5,3V, looks like it is the main problem. May be short circuit or over current. Find a hot IC. Or may be the power supply side failure, check (and write here) Q1102 voltages on PSU board (in schematics, left from the connector).
Regards,
Jácint

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gianluca

hi, the collector-base voltage chart is right from service manual. i think that i make a short when i try to engage together service/test mode.(see in detail the images attached)

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city217

Sziasztok.
Jól mondod a Q1102 kell mérni, annak is a bázisát.
De olyan jól megvannak adva a feszültségek, el se lehet tévedni.
Bocs Jaca. Fordítsd már le emberünknek, mert én értem és beszélem az angolt, de még írni nem tanultam meg. :)
Üdv.

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Jaca
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Szia City!

Leírtam, mérje meg, és írja is meg, miket mért. Remélhetőleg kapunk 3 feszültségértéket. De úgy nézem, a magyart angolra fordítani egyértelműbb, mint visszafelé.

Üdv: Jácint

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Jaca
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Hi,
Please write in Your language too. May be the translation sometimes funny..

Regards,
Jácint

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gianluca

sajnálom, ellenőrizem a tápegységet, és a szabályozatlan feszültség rendben van.
Megcsinálom ezt a műveletet megvilágított szobában
K mechanizmussal rendelkezik

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Malibu
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First steps...check the power supply and front panel caps and replace if have high esr,
check suspect solder joints, remove every ribbon cable to clean the contacts...

Malibu

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city217

Háj.
Én értem hogy nem tudod jól kifejezni magad, de mi az a "szabályozatlan feszültség"? Netán az AC, ha igen akkor ugorj rá a DC-re.
De mint mondtam tedd rá a tetőt, mert addig szórakozik veled. Ha ai opto-t fény éri akkor behülyül.
Üdv.

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Malibu
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Ilyen stílusú fordításokon negyon el lehet szórakozni, főleg ha adok-veszek oldalokon kínált termékek gugli fordítását tartalmazza egy az egyben ... :-)

Üdv.

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DINO54
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Heló !
A helyzet az hogy a panaszos Böske néniék nyelvén írogat. Nem szittyaföldön tanulta a nyelvet. Ha azt a francos gugli forditót el tudná felejteni, mindenki többet értene a szövegéből. Vagy keressen egy olyan fórumot ahol nyelvi nehézségei nincsenek.
Laci

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Tropfehérke
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Szia!

Csak általános ötletem van.
A system controll proci RST lábát kéne feltenni tápra, majd GND-re, vagy kondenzátorral az órajelkvarcot megállítani 10-30 másodpercre.

üdv.
Tropfehérke

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gianluca

can tou explay me better?

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zoltan35
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Szia!
:jajj: "Megpróbáltam rázni a tápegységet" hidd el, fordítva rosszabb lenne!
Üdv,Z.

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Jaca
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Szia!

Kölcsön kenyér visszajár!

Üdv: Jácint

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city217

Szia.
Ez nagyon jó, de ha ezt sötétben csinálná, talán még működne is. A Panasonic nem szereti a fényt.
Üdv.

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Janos.ro

Khmmmm... ezt csinálja sötétben? Nem biztos, hogy jó lenne...
"Megpróbáltam rázni a tápegységet"
Na jó, értem én amit írsz, de ez elég mulatságosan hangzik :-)

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