SONY DE301NC
Manual de Servicio

r

SCHEMATIC DIAGRAM

D-E300AN/E301/E305/E307CK/E307CKT
r WAVEFORMS

1

SERVICE MODE during TRK servo OFF

5
2.6 Vp-p

3.9 Vp-p

4.32MHz

16.9 MHz
VOLT/DIV : 1 V AC TIME/DIV : 0.1msec

IC502 &ª

IC301 !§

VOLT/DIV : 1 V AC TIME/DIV : 50nsec

2
2.9 Vp-p

6
3.0 Vp-p

4.19MHz 136 µsec

ESP : OFF
VOLT/DIV : 1 V AC TIME/DIV : 50µsec

IC502 ^¢

IC801 @º

VOLT/DIV : 1 V AC TIME/DIV : 0.2msec

3
2.9 Vp-p

7

1.0 ± 0.2 Vp-p

22.7 µsec

ESP : OFF
VOLT/DIV : 1 V AC TIME/DIV : 10msec

IC502 ^�

IC501 @£

VOLT/DIV : 0.2 V AC TIME/DIV : 0.5msec

4
3.0 Vp-p

0.47 µsec

ESP : OFF
VOLT/DIV : 1 V AC TIME/DIV : 0.2msec

IC502 &º

Note :
� All capacitors are in µF unless otherwise noted. pF: µµF 50WV or less are not indicated except for electrolytics and tantalums. � All resistors are in and 1/4 W or less unless otherwise specified. � ¢ : internal component. Note : The components identified by mark ! or dotted line with mark !are critical for safety. Replace only with part number specified. � � Note : Les composants identifiés par une marque !sont critiques pour la sécurité. Ne les remplacer que par une pièce portant le numéro spécifié. � Power voltage is dc 4.5 V and fed with regulated dc power supply from external power voltage jack (J401). � Voltage and waveforms are dc with respect to ground under no-signal conditions. no mark : STOP ( ) : PLAY � Voltages are taken with a VOM ( Input impedance 10M ). Voltage variations may be noted due to normal production tolerances. � Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. � Circled numbers refer to waveforms. � Signal path. : CD

B+

: B+ Line : adjustment for repair.