6-4. SCHEMATIC DIAGRAM � Refer to page 25 for IC Block Diagrams. � Waveforms
MINIDISC OPTICAL PICK-UP BLOCK
(MODE:PLAY)
1
* : The electrical components differ according to the version of the system control IC (IC801). When replacing the IC801, check its model name and add or remove D1001 and/or R1001 as shown below. RU6815MF-0004 (Ver 3.0) .... Add D1001 and R1001 RU6815MF-0005 (Ver 3.2) and later .... Remove D1001 and R1001
800mVp-p
IC501 @� TIME/DIV : 5 µsec
VOLT/DIV : 200mV AC
2
2.7Vp-p
23 µsec
IC601 #ª TIME/DIV : 10 µsec
VOLT/DIV : 1V AC
3
2.6Vp-p
482nsec
IC601 $¡ TIME/DIV : 200nsec
VOLT/DIV : 500mV AC
4
2.0 Vp-p
16.9344 MHz
IC601 $ª TIME/DIV : 20nsec
VOLT/DIV : 500mV AC
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. Note: The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. � A : B+ Line. � Power voltage is dc 3 V and fed with regulated dc power supply from battery terminal. � Voltage and waveforms are dc with respect to ground under no-signal conditions. no mark : MD PLAY � 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. � Signal path. J : MD
