SONY CDX4180
Service Manual

4-2. CIRCUIT BOARDS LOCATION

� Waveforms

(MODE:PLAY)

1
0V

DISC IN SW board

SUB board
Approx. 620mVp-p

tuner unit LIMIT SW board

IC2

1

(FEO)

2
1.2Vp-p

IC2

#¡

(RFO)

3
0V Approx. 200mVp-p

IC2

$�

(TEO)

4
2.6Vp-p

DISPLAY board

MAIN board

7.6µsec

IC1
LOAD SW board SERVO board

3

(MDP)

5
5.8Vp-p 22.7µsec

IC1

@º

(LRCK)

6
5.7Vp-p 474nsec

Note on Schematic Diagram: � 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. Note: The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. � U : B+ Line. � H : adjustment for repair. � Power voltage is dc 14.4V and fed with regulated dc power supply from ACC and BATT cords. � Voltage and waveforms are dc with respect to ground under no-signal conditions. no mark : CD PLAY � : Impossible to measure � 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. Voltage variations may be noted due to normal production tolerances. � Circled numbers refer to waveforms. � Signal path. J : CD

IC1

@�

(BCK)

7
3.2Vp-p 16.89MHz

IC1

#¢

(XTAI)

� 21 �

� 22 �