Technics RS-M250 Service Manual

3S-M250 -
CONTENTS
ITEM PAGE
LOCATION OF CONTROLS AND COMPONENTS ccce-sscssseeeseecteeceeceesuescsurecereserseevens 1
DISASSEMBLY INSTRUCTIONS siaciveesissecacsessceves eure saud cvavcisesvare gions daaet dasgeaeepes 2
MEASUREMENT AND ADJUSTMENT METHODS -ecee-+ssccecssseeseeeccssceeesesessucecssnneeceeeas 3
MN1400RS: TERMINATION BOTTOM VIEW<-::::cccccvccssecesceccccscntececuesesntseeeeceseaeeeeas 7
MN1400RS:
EACH
TERMINAL
FUNCTION
AND
WAVEFORM.
+:--.-:0:eesseseeeeeseeeeeseeeees
8
TROUBEESHOOTING ws csseseecaseedesitand nase ovate eGes loctu de sstioges eagesnadaes yevaaede odes adden tended 12
EV ECTRICAL PARTS LOCATION taticccchveetee aioe Aine ik seeeseuelvpeaaunandel yee ves os 13
SCHEMATIC DIAGRAM (MAIN AMP SECTION) -..-----ccceeeeeeeeerceetceeeentseeeeceteeteceeeeseens 15
CIRCUIT
BOARDS
(MAIN
AMP
CIRCUIT
BOARD,
FL
METER
CIRCUIT
BOARD)
«+--+
16
SCHEMATIC DIAGRAM (MAIN CONTROL SECTION, DIGITAL TAPE COUNTER
DRIVE GEG DION esos rice bons pe eons ainead acco pan wad Geena pec esaaneand wae 17
CIRCUIT BOARDS (MAIN CONTROL CIRCUIT BOARD, DIGITAL TAPE COUNTER
DRIVE
CIRCUIT
BOARD,
CONTROL
KEY
SWITCH
CIRCUIT
BOARD).------::0sceeeeeeee
eee
18
MECHANISM
EXPLODED
VIEWS
--ccessccccscceseccccceceucecsscuscccusceusecenececaesencenesenecenetens
19
WIRING CONNECTION
DIAGRAM
-ecesecccseccecceesetceesetccvecsceuccesscescsceaaucsststavertneeaescs
20
MECHANISM
PARTS
[OCATION:
65sieot
250
scene
etacd
otacenareusee
oie va
vac pncielacbney
cod
etn dalewias 21
BINE
PPAR Gs
eae
thet
oleate
aA
tela
pawtasds
rth
aee
cate
mated
ee
etbave
hen
kee.
21
LOCATION OF CONTROLS
AND COMPONENTS
@) @ Power switch [power (push on)]
@ Eject button (eject)
@® Cassette holder
@ Remaining tape display light
© Head light
Timer start switch [ (Q timer (rec- off-play)]
@ Memory switch [memory (stop -off- play: repeat)]
Reset button (counter reset)
Digital tape counter (tape counter)
FL (fluorescent level) meters
@ Microphone jacks [mic (left-right)]
@ Input level controls [input level (L --R)]
@ Dolby noise reduction switch
[Dolby NR ( # out. min)j}
Tape selector
[tape select (nor-Fe-Cr-CrO2-Metal)]
@® Multiplex filter switch [MPX filter (@ out- m in)]
Output level control (output level)
@ Input selector [input select (mg line-.m mic) (DIN)]
@ Record-muting button (rec mute)
@ Fast forward button (p> p> ff)
@ Stop button (M stop)
@ Remote-control connector (remote)
@ Play button/Playback-indication lamp ( [> play)
@ Rewind button (qq rew)
@ Pause button/Pause-indication lamp (© pause)
@ Record button/Record-indication lamp (© rec)
@ Headphones jack (phones)
@ Line output jacks (LINE OUT) (R, L)
@ Record/Playback connection socket (REC/PB)
@ Line input jacks (LINE IN) (R, L)
@ Voltage selector (VOLTAGE SELECTOR)

Technics RS-M250 Specifications

General

Brand	Technics
Model	RS-M250
Category	Cassette Player
Language	English