SONY CDPXB920/E
Service Manual

SECTION 6 DIAGRAMS
6-1. CIRCUIT BOARDS LOCATION THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this necessary note is printed in each block.)
For schematic diagrams. Note:
� All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. � All resistors are in � and 1 /4 W or less unless otherwise specified. � % : indicates tolerance. � ¢ : internal component. � 2 : nonflammable resistor. � 1 : fusible resistor. � C : panel designation. Note: The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. � � � � � U : B+ Line. V : B� Line. H : adjustment for repair. Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. Voltages are taken with a VOM (Input impedance 10 M�). Voltage variations may be noted due to normal production tolerances. Waveforms are taken with a oscilloscope. Circled numbers refer to waveforms. Signal path. J : CD c : DIGITAL OUT
45MHz 16.9344MHz (PLAY)

� Waveform

1

TP1 (RF)

1.5Vp-p

KEY board POWER SW board SERVO board

2

CN304 !¡

2.7Vp-p

3

IC301%¢ (128FSO)

4.0Vp-p

HP board

5.6448MHz (128Fs)

ROTARY SW board MAIN board DISP board
� � �

4

IC301@� (XOUT)

4.8Vp-p

For printed wiring boards. Note:
� X : parts extracted from the component side. � ® : Through hole. � ¢ : internal component. � b : Pattern from the side which enables seeing.

5

IC801#ª (EXTAL)

POWER board

4.0Vp-p

TRANS board

8MHz

LOADING board

SLED board SPINDLE board LD IN SW board

� 13 �

� 14 �