Technics SA 104 Service Manual
This is the 22 pages manual for Technics SA 104 Service Manual.
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Extracted text from Technics SA 104 Service Manual (Ocr-read)
Page 3
AM WW"? WMa' AM levnxabal _ Mam speakev mnninals
antenna coil
FM amanm- AC Bullet (Unswitchadl
terminals
I ' Vohage selecwr
® 9 9 Q) (on (he bonomview!
Ll-l-l-Remote speaker tuminal:
' The power suppv for this unn varies depending upon the areas.
Also, the pans used for power supply are different So. refer m
the cimml diagram and the replacement parts lisx.
' [XA] area ls prowdm with voltage selector and Ac ouUet.
Phono inpm capacnance is about 150p}?
Ground
Phnno input
Aux mpu!
Iec nut
Tana-l
olavback
Rec/play (DIN) socku
Voltage amp. 8: Dower amp. IC- FM IF amp. 5. FM dewuor circa
Tuning gang
Power supply civcuit
Equalizer cucuu
Tone circuix
FM MPX circuit
I BEFORE REPAIR AND ADJUSTMENT
Turn of! (he power supply and shortrcnrcun both ends of power suppw condensers [C701,C702,4700uF}at
resistance (about 10!), SW) m order to dxscharge the chargéd votage Avoid short-civcun wilh a screwdriver or (he like,
otherwise the lransismrs or diodes may break down
Before wining on [he pewer supply ailev comulexion oi yepair, sowv apply [he pnmary vallage by using a voltage
regulator to make sure that the currem consumed us free of abnbrmalfty The current consumed at 60Hz/SOH2 m no-
signal mode is 1 10V (120 ~ SOOmA), 120V: (100 ~ 24DmA)1220V [50 " IEOmA). ZAOV (40 ~ I20mA).