Technics SL-1200-M-3-D Service manual

SL-1200M3D

Schematic Diagram

Notes:

The voltage value and waveforms are the reference voltage of this measured by DC electronic voltmeter (high impedance) and oscilloscope on the basis of chasssis. Accordingly, there may arise some errors in the voltage values and waveforms depending upon the internal impedance of the tester or the measuring unit. Important safety notice:

Components identified by use only manufacture’s specified parts.

NO MARK: Voltage when at a stop ( ) : Voltage during rotation

•S201 :

•S202 :

•S203 :

•S301 :

•S302 :

•S401 :

•S601 :

•VR201 :

•VR301 :

•VR302 :

•VR303 :

SPEED SELECTOR (33 rpm) switch. SPEED SELECTOR (45 rpm) switch. START/STOP switch. PITCH CONTROL RESET switch in “OFF” position. (Interlocked with VR303) PITCH RESET switch in “OFF” position. STYLUS ILLUMINATOR switch in “ON” position. POWER switch in “ON” position. BRAKE ADJUSTMENT VR. PITCH CONTROL ± 0% ADJUSTMENT VR. PITCH CONTROL GAIN ADJUSTMENT VR. PITCH CONTROL ADJUSTMENT VR. (Interlocked wwith S301)

mark have special characteristics important for safety. When replacing any of these components,

: +B Line

Type Illustration of IC’s, Transistors and Diodes

. 17 .