Service manuals, schematics, eproms for electrical technicians

NATIONAL PANASONIC RQ-443 DS SCH.

AUDIO - SERVICE MANUAL
Type: (DJVU)
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73.2 KB
Page
2
Category
AUDIO
SERVICE MANUAL
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    NATIONAL PANASONIC RQ-443 SCH. RQ443 DS RQ 443
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
Harman Kardon Avr151 230 táp hiba
Hello!
A fenti erősítő tápja megadta magát, 
kicserltem mindent ami rossz volt,
már csak egy smd 6 lábu meghajtó
tipusára lennék kiváncsi ic92 pocicio számu.
Köszi!
May be useful - Harman Kardon information
For your information to repair Harman KArdon HD710 Player uses a KSS210B Pickup (as spare, original unknown) can be changed without any other servicing Harman Kardon Receivers; Series AVR 2000,3000... "Looses memory issue"- gold cap at the front pcb defective. May be changed to a 1µ cap but you have to solder 3 other elko´s to the other side. Keeps memory for a longer time. "Hum noise for the first 5min, warm up" - right lower side at the main pcb: elko 7800µ dead- you can see it at the "cap of it". Replace both (7800µ and 2200µ) to new versions above 25V. "Fuse burnt voltage selection; no green led´s flash, no sound"- cap 2200µ make a short circuit (next to 7800µ). Change these elkos! If you want to make it better... change the 7x 10µ caps for the regulators too. Resolder all points there. "volume changes self to max. or min." change the two resistors at the front pcb close to the volume encounter. be sure that there are both sides 5V! "everything is functional but no sound; but sound from the 6.1ch in" TC9273N-07 is dead (shorted). Have a look at the two caps and the security resistors beneath this chip! My be dead too. Replace this chip only by the -007 version. others will not function. Be careful with the bigger stripe cable! the contact lines are loosen from the plastics. You can help yourself with a "second glue" under these contacts. So i hope i can help you... cheers SG.
KENWOOD KA660D csak "phone" bemenetről van a kimeneten hang.
Sziasztok! 
Hozzám került javításra ez a készülék. 
A hiba jelenség a következő: akár milyen forrást választok nincs hang a kimeneten.
Kivéve csak direct source vagy source, phone forrás az ami megy. Tape 1, Tape 2, CD, AUX stb teljesen néma.
A választó kapcsoló gyanítom hibásnak. 
Szkóppal mértem jelet de valahogy el vesztem a mérendő jelet, s nem tudok ki igazodni már rajta. 
Ezért kérdem tőletek hogy találkozott e valaki hasonló hibával, mert nem tudok rá jönni a hibára.
Lehet én bonyolítom túl a dolgot. 
De szeretnék pontot tenni a dolognak a végére. 
Kérem aki tud az osztja meg velem a tapasztalatát. 
Előre is köszönöm! 
Üdv Istvan78! 
Keresek ESM 231N típusú IC-t
Phuilips N4420 orsós magnóba keresek 2db  ESM 231N végfok IC-t, vagy komplett panelt.
 Akinek van és eladó, kérem jelezze.
Köszönöm
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