Service manuals, schematics, eproms for electrical technicians

HEATHKIT W-5M HIFI AMPLIFIER SCH

AUDIO - SERVICE MANUAL
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AUDIO
SERVICE MANUAL
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    HEATHKIT W-5M HIFI AMPLIFIER W5M 5M
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
Grundig R301
Kedves Fórumozók ! A fent említett Grundig R301 receiver kapcsolási rajzát keresném, a kezelőegység processzora IC402 pozícióban: M34200M4-3585P Itt a Tanyán nem találtam....:-( Segítségeteket előre is köszönöm ! NZs
Turntable Victor/JVC TT-71
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
[BEAMER/PROJECTOR] SONY VPL-SERIES POWER UNIT RPS9522M-02 / 1-474-223-11 SCHEMATIC DIAGRAM RUBYCON COOPERATION

hi i am looking for the schematic diagram of a sony power unit.

Sony VPL-fx35/fh31/fhz55/f420hz/f425hzl  power unit RPS9522M-02
or from part number 1-474-223-11 

i hope somebody can help me out or if you have it partly from reverse enginering please upload or let me know.

Chrysler rádio USA FM
Sziasztok! Lenne egy régebbi Chrysler rádió USA FM-el A tuner Temic 1890 DFC 3X5 562. Hogy lehetne ezt EU-ra állítani? Köszi
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