Panasonic SL-SX450EB, Service Manual

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9 Schematic Diagram Notes
Note:
●
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 pickup
comes 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 special
characteristics important for safety.
·
When replacing any of components, be sure to use only
manufacture’s specified parts shown in the parts list.
· The supply part number is described alone in the
replacement parts.
· Signal line
· : Positive voltage line.
· : Playback signal line.
·
The voltage value and waveforms are the reference
voltage of this measured by DC electronic voltmeter
(high impedance) and oscilloscope on the basis of GND
terminal (DC IN Jack). Circuit voltage and waveform
described herein shall be regarded as reference
information when probing defect point, because it may
differ from an actual measuring value due to difference
of Measuring instrument and its measuring condition
and product itself.
Measurement conditions:
*( ).......CD playback mode (Test disc 1kHz, L+R, 0dB)
*No mark.......CD stop mode
Caution!!
· IC and LSI are sensitive to static electricity.
· Secondary trouble can be prevented by taking care
during repair.
·
Cover the parts boxes made of plastics with aluminum
foil.
·
Ground the soldering iron.
·
Put a conductive mat on the work table.
· Do not touch the pins of IC or LSI with fingers directly.
16
SL-SX450EB / SL-SX450EE / SL-SX450EG / SL-SX450GC / SL-SX450GN