Service manuals, schematics, eproms for electrical technicians

SONY WM-EX20.

AUDIO - SERVICE MANUAL
Type: (DJVU)
Size
499.9 KB
Page
20
Category
AUDIO
SERVICE MANUAL
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  • Also known:
    SONY WMEX-20. WMEX20. WMEX 20 WM EX20. WM-EX20.
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
Sony COMPACT DISC RECEIVER HCD-MX500i/MX550i
A STDBY-LED a bekapcsolás kb. 3 mp után kialszik.A STDBY-LED-R bekapcsolás után a 0 V feszültség ugyan annyi idő alatt 3,3 V ra ugrik, akkor a Q623 RT1P441C-TP-1 led drive nem tud működni. Az EVER+3.3V és az EVER 4V mindig mérhető. A készülék szervíz kézikönyve elérhető a Fórum oldalain. I found that VC1 0n IC11 is missing. After checking I found C25(330u 35V) s/c i.e. defect. The problem solved.
Sony STR DH130 protection mode
Friends Sony STR DH130 goes into protection mode soon after turning on.  It works for a second then can hear loud pops from speakers.
I've tried the suggested methods to fix but nothing works.  Correct impedance speakers.  Speakers wired correct.  Good ventilation.
I've tested the output transistors in circuit and I don't see anything unusual.  I may pull them to test but will wait for advice here.  I also measure
about 57 volts on the emitter resistors.  Seems high to me.  Anyone?
Sony RM-SC 50 távvezérlő
Sziasztok! A SONY MHC-EC55 tipusú hifihez keresem a következő távvezérlőt: SONY RM -SC50. Űdv.József
 Sony STR-DN1080 infra vevő keresés-helyettesítés
Sziasztok!

A címben említett erősítőben megállt az infra vevő, rajzon ez a tipus szerepel: PNA4823M03S0, a tokon ezek találhatók: H28 U93 07C sajnos ezekről semmit nem találtam sehol. Mivel van itt egy kisebb széria végfok hibával nálam, abból próbára átraktam az infra vevőt és megy tökéletesen, szóval bitos, hogy a vevő a hibás.

HQ-nál van ez a nevű: TSOP4838 infra vevő, ezzel ki lehetne váltani?

Esetleg ha lenne valakinek bontott infra vevője, az is érdekelne.

Üdv.: Viktor

 
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