Sony MZ-R70 Service Manual - Page 28

MZ-R70 6-4. PRINTED WIRING BOARD - MAIN BOARD - 1 2 3 4 5 6 7 8 9 10 11 Common note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF A 50 WV or less are not indicated except for electrolytics and tantalums. • All resistors are in Ω and 1/4 W or less unless otherwise specified. • % : indicates tolerance. • f : internal component. • C : panel designation. B Note: Note: The components identi- Les composants identifiés par fied by mark 0 or dotted une marque 0 sont critiques line with mark 0 are criti- pour la sécurité. cal for safety. Ne les remplacer que par une Replace only with part piéce portant le numéro number specified. spécifié. C • A : B+ Line. • Power voltage is dc 3V and fed with regulated dc power supply from external power voltage jack. • Voltages and waveforms are dc with respect to ground in playback mode. no mark : REC ( ) : PB ∗ : Impossible to measure D • Voltages are taken with a VOM (Input impedance 10 MΩ). Voltage variations may be noted due to normal produc- tion tolerances. • Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal produc- tion tolerances. • Circled numbers refer to waveforms. E • Signal path. J : CD F Common note on Printed Wiring Boards: • Y : parts extracted from the conductor side. • f : internal component. • : Pattern from the side which enables seeing. Caution: G Pattern face side: Parts on the pattern face side seen from the (Side B) pattern face are indicated. Parts face side: Parts on the parts face side seen from the (Side A) parts face are indicated. • Main board is four-layer printed board. However, the patterns of layers 2 and 3 have not been in- H cluded in this diagrams. * IC502, IC801 is not replaceable • Lead Layouts surface I Lead layout of conventional IC CSP (chip size package) MAIN BOARD (SIDE A) S801 (OPEN/CLOSE) S802 (OPEN) C624 OPTICAL PICK-UP 04 TP904 IC504 85 14 C510 IC505 85 14 FB601 C638 C629 R524 R525 R636 C534 C536 C535 AP530 X501 C640 25 20 15 C514 10 30 IC601 5 35 40 45 481 C616 C631 R520 C527 C528 FB505 L604 RB603 RB602 TP344 TP315 TP343 TP333 C623 C625 C621 L601 C632 R619 AP5101 TP5112 CN501 1 L501 C304 C303 L301 R307 R321 R302 TP332 C220 C222 R204 R104 C113 TP331 TP334 TP341 TP335 TP342 R201 C120 C618 C617 R325 R528 R526 R522 R638 TP5105 TP5118 R809 AP5119 C525 AP5102 10 TP5120 L902 20 C925 C524 C917 C913 L901 C308 R202 C122 R102 C307 TP348 R301 TP347 D905 C333 R322 TP903 C106 R101 C202 C103 C334 C102 TP336 TP346 TP345 C203 TP337 TP338 D101 D201 R814 R812 R802 R803 R805 R840 R806 R808 R815 R811 R834 R835 C915 L903 D907 C930 TP816 AP909 AP910 R801 C810 R807 AP808 TP9001 R838 TP801 TP828 R813 TP914 TP915 R936 R923 R921 C929 C910 R937 R924 R913 C918 R929 C922 C933 C932 C926 R934 R912 R919 D906 L905 C206 R203 R208 R223 C201 TP905 R209 TP317 TP906 TP311 TH901 LF901 R938 C921 R931 R928 C934 R927 C923 S803 T.MARK C605 L606 TP601 C612 R637 R611 R614 D602 R612 R639 R942 D601 C935 R930 L904 TP823 R907 Q905 R908 C905 C902 TP316 TP312 TP313 TP314 R613 1 8 L603 J301 (1/2) LINE IN (OPTICAL) J304 (1/2) i 1 (LINE OUT) C602 C601 C600 C613 Q603 R903 C614 C615 4 5 D600 1-677-124- 11 - 31 - - 32 -