Technics SL 1900 Service Manual

Page 1

Service Manual

Direct Drive Automatic Turntable System

SL-l 900 (M, MC)

0 The modal $L-1900 (Mi is «out». in America only.
. The model SL-1900 (MC) iii-aim in Can: only.

Specifications Specifications are subject to change without notice for funner improvement,
Weights and dimensions shown are aODroximate.
General
Pm sum ....... AC 120 V. 50 or 60 Hz Rumbh ............ ~73 (18 (cm 455398}
F Pm Commotion . . 6W -50 dB (DIN 45539A)
Dimsions ......... 13.7 x 43.0 x 33.4 cm
(H x w x Di {5-3/8 x 16-15/16 x 13-1/8 inches) Tonnrm section
Weight ............. 7.2 kg {15.9 lbs.) Typo .............. Universal tubular arm. static-
balanced type
Tummle section Effectiv- longth ..... 230 mm (94116")
Typo .............. DireCt Drive Automatic Turntable Overhang ........... 15 mm (9/12)
System. Automatic start, Auto- Friction ............ Within -7 mg [horizontally and
matic return, Automatic shut-off, vertically]
Repeat play with convenient Traok'mg m angi- . . Within +3° at the point of 145
memonpeat knob and Manual mm (545164") from
play 6 the center
l Drive mound ....... Dirac: Drive Within +1 at the point of 55 mm
Mom ............. Back Electrometive Force Fre- (23/16") from the
quency Generator servo DC motor center
empioying one chip lC Offs angle ......... 215°
Turntable platter ..... Aluminum die-cast. 31 cm (12-1/8") Adjustable :1th procure
Turntable spends. .. . . 33-1/3 and 45 r.p.m. range ............. 0 to 3 9 (mm: pressure direct
Pitch cannot: ....... individuat adiustment controls, reading time)
10% aiusrment range Cartridg- mignt noon. 5 to 10 9
Wow and flutter . . . . 0.03% W.Fl.M.$. (JiS C552 Heath-ll raid" ..... 9.5 9
30.04296 Weighted zero to peak
lDiN 45507)
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I PARTS IDENTIFICATIONS

AC power plug

Hinge

Turntable base

Turntable mat

Motor shaft

Strobe illuminant/pilot lamp

Strobe dots

Turntable matter

Output terminus

Ground wire [EIGNDJ

45 r.p.m. adaptor
Balance weight

Stylus pressure ring

Anti-skating control knob

Arm rest

Cueing lover
Arm stamp

Memorepelt knob

Tubular arm

Record stze selector

Startlttop lave:

Locking nut

Speed selector Pitch control Image
Hudshen
. Fin-1
I TO REMOVE CABlNET AND BOTTOM COVER
1. Remove the cartridge. 7. Take 0 8 vis-screws from the bouom cover. (Fig. 3}
2. FIX the tone arm to the arm rest. 8. Place the player set face upward hclztzng it with both
3. Remove the turntable. . hands so that the body is not separated from the main
4. Remove the operation cover. body.
5. Remove the speed seleCtor knob and the pitch control 9, For separation of the body from the bottom cover. turn
knobs (Fig. 2) the cueing lever upward, move the tens-arm to board
6, Turn the player set upside down with good care not to direction, then lift up the bodv. iFig. 4}

damage the acryl cover.

Fig. 3