9 Schematic Diagram NotesNote:S201: Laser ON/OFF switch in “ON” position.(It turns “ON” with CD Lid.)S202: Rest switch in “OFF” position.(It turns “ON” when optical pickupcomes to innermost periphery.)S310: Hold (HOLD) switch in “OFF” position.S821: Program play/ Digital Re-master/ Anti-skip mode selection (MEMO) switch.S822: Play mode/ Album mode selection(MODE) switch.S823: Sound quality selection (EQ) switch.S824: Play/pause ( ) switch.S825: Stop/Turn off ( ) switch.S826, 827: Skip/search/ Album skip ( ,) switch.S828, 829: Volume control (VOL+,VOL -) switch.· Components identified by mark have specialcharacteristics important for safety.· When replacing any of components, be sure to use onlymanufacture’s specified parts shown in the parts list.· The supply part number is described alone in thereplacement parts.· Signal line· : Positive voltage line.· : Playback signal line.· The voltage value and waveforms are the referencevoltage of this measured by DC electronic voltmeter(high impedance) and oscilloscope on the basis of GNDterminal (DC IN Jack). Circuit voltage and waveformdescribed herein shall be regarded as referenceinformation when probing defect point, because it maydiffer from an actual measuring value due to differenceof Measuring instrument and its measuring conditionand product itself.Measurement conditions:*( ).......CD playback mode (Test disc 1kHz, L+R, 0dB)*No mark.......CD stop modeCaution!!· IC and LSI are sensitive to static electricity.· Secondary trouble can be prevented by taking careduring repair.· Cover the parts boxes made of plastics with aluminumfoil.· Ground the soldering iron.· Put a conductive mat on the work table.· Do not touch the pins of IC or LSI with fingers directly.16SL-SX450EB / SL-SX450EE / SL-SX450EG / SL-SX450GC / SL-SX450GN