Sony MDS-JE770 For schematic diagrams, For printed wiring boards, WAVEFORMS -BD Board, MAIN Board

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.

(In addition to this, the necessary note is printed in each block.)

For schematic diagrams.

Note:

•All capacitors are in ∝F unless otherwise noted. pF: ∝∝F 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.

•f : internal component.

•C: panel designation.

Note:

The components identi- fied by mark 0or dotted line with mark 0are criti- cal for safety.

Replace only with part number specified.

•A: B+ Line.

•B: B– Line.

•H: adjustment for repair.

•Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions.

no mark : STOP

( ) : PLAY

<> : REC

∗: Impossible to measure

•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.

•Signal path.

E : PB

j : REC

p : PB (DIGITAL OUT)

l: REC (DIGITAL IN)

•Abbreviation

SP : Singapore model

For printed wiring boards.

Note:

•X: parts extracted from the component side.

•Y: parts extracted from the conductor side.

•a : Through hole.

•b: Pattern from the side which enables seeing. (The other layers' patterns are not indicated.)

Caution:

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.

B C E

These are omitted.

B C E

These are omitted.

C

Q These are omitted.

B E

•WAVEFORMS

–BD Board –

1 IC101 ek (RF)

1.3Vp-p

2 IC101 ef (FE) (Play mode)

0.2Vp-p

3 IC101 wh (TE) (Play mode)

1.6Vp-p

4 IC151 qh (OSCI)

3.1Vp-p

22 nesc

5 IC151 wj (LRCK)

3.2Vp-p

22.6 ∝sec

6 IC151 wk (XBCK)

3.8Vp-p

354 nsec

7 IC151 o; (FS4)

3.2Vp-p

5.67 ∝sec

8 IC171 3

1.0Vp-p

22 nsec

37 37

MDS-JE770

– MAIN Board –

1 IC1 qd (XOUT)

2.7Vp-p

100 nsec

2 IC550 qs

2.6Vp-p

22nsec

–DISPLAY Board –

1 IC760 yh (OSCO)

3.2Vp-p

0.4 ∝sec