SONY STRDE985
Service Manual

STR-DE885/DE985

4-2. CIRCUIT BOARDS LOCATION

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.)

AC SELECT board STANDBY board POWER board S-VIDEO board HEADPHONE board VIDEO board DIGITAL board SPEAKER board

for 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. � f : internal component. � 2 : nonflammable resistor. � 5 : fusible resistor. � C : panel designation. Note: The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. � A : B+ Line. � B : B� Line. Note: Les composants identifiés par une marque 0 sont critiques pour la sécurité. Ne les remplacer que par une piéce por tant le numéro spécifié.

for printed wiring boards: � X : parts extracted from the component side. � f : internal component. � : Pattern from the side which enables seeing. Caution: Pattern face side: (Side B) Parts face side: (Side A) C Q BE These are omitted. Parts on the pattern face side seen from the pattern face are indicated. Parts on the parts face side seen from the parts face are indicated.

Q BC Q BC E E These are omitted.

OPT3 board

VIDEO3 board JOG board DISPLAY board MAIN board COMPONENT board

� Voltage and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM � 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. F : TUNER (FM/AM) L : VIDEO (AUDIO) I : VIDEO J : CD (ANALOG) c : CD (DIGITAL) � Abbreviation CND : Canadian model. E23 : AC 120/220/240V area in E model. MX : Mexican model.

� Abbreviation CND : Canadian model. E23 : AC 120/220/240V are in E model. MX : Mexican model.

� Waveforms (DIGITAL Board)

� Waveform (DISPLAY Board)
1V/DIV 50nsec/DIV 3.2Vp-p 13.5MHz 0.48µsec

1

1V/DIV 50nsec/DIV 3.6Vp-p 80nsec

4

1

1V/DIV 0.2µsec/DIV 3.5Vp-p

IC1301

ws

(XIN)

IC1551

<zc.

(MCLK2)

IC101

e;

(CLK)

2

1V/DIV 20nsec/DIV 3.6Vp-p

5

1V/DIV 20nsec/DIV 4.0Vp-p

24.576MHz

40nsec

IC1306 2

IC1551

0

(SCKOUT)

� Waveform (VIDEO Board)

3

1V/DIV 50nsec/DIV 3.2Vp-p 13.59MHz

6

1V/DIV 20nsec/DIV 3.2Vp-p 16.5MHz

1

1V/DIV 20nsec/DIV 4.2Vp-p 14.31818MHz

IC1501

qs

(MCLK2)

IC1101

tj

(X1)

IC252

9

(XS)

21

21