STR-VX700 - Sony Audio Service Manual (repair manual)

E Model

MICROFILM

This set is the tuner and amplifier
section in MHC-VX700AV.

The following measured at AC 120, 220, 240V 50/60 Hz
DIN power output (Rated) (FRONT)

120 + 120W (6 

Ω

 at 1kHz DIN)

Continuous RMS power output (Reference)

FRONT SPEAKER: 150 + 150W
(6 

Ω

 at 1kHz, 10% THD)

CENTER SPEAKER: 60W
(8 

Ω

 at 1kHz, 10% THD)

REAR SPEAKER: 40 + 40W
(8 

Ω

 at 1kHz, 10% THD)

Inputs

MD/VIDEO 1 IN (phono jacks): voltage
450/250mV, impedance 47k

Ω

AV INPUT AUDIO (phono jacks): voltage
250mV, impedance 47k

Ω

MIX MIC 1/2 (phone jack): sensitivity 1mV,
impedance 10k

Ω

Output

MD/VIDEO 1 OUT (phono jacks): voltage
450/250mV, impedance 1k

Ω

PHONES (stereo phone jack): accepts
headphones of 8

Ω

 or more.

FRONT SPEAKER:
accepts impedance of 6 to 16

Ω

CENTER SPEAKER:
accepts impedance of 8 to 16

Ω

REAR SPEAKER:
accepts impedance of 8 to 16

Ω

SUPER WOOFER:
Voltage 1V, impedance 1k

Ω

FM stereo, FM/AM superheterodyne tuner

Tuning range

87.5 – 108.0MHz

Antenna terminals

75

Ω

 unbalanced

Intermediate frequency

10.7MHz

Tuning range
Thai models:

531 – 1,602kHz (with the AM tuning
interval set at 9kHz)
530 – 1,710kHz (with the AM tuning
interval set at 10kHz)

Other models:

MW: 531 – 1,602kHz (with the MW tuning
interval set at 9kHz)
530 – 1,710kHz (with the MW tuning
interval set at 10kHz)
SW: 5.95 – 17.90MHz (with the SW tuning
interval set at 5kHz)

Intermediate frequency

450kHz

Antenna

AM loop antenna External antenna terminal

Power requirements
Thai models:

220V AC, 50/60Hz

Other models:

120V, 220V or 230 – 240V AC, 50/60Hz
Adjustable with voltage selector

Power consumption

340W

Dimensions (w/h/d)

Approx. 288 

×

 205 

×

 375mm

Mass

Approx. 8.7kg

Design and specifications are subject to change without notice.

2

!

!

·········································································· 3

2-1.

Sliding Panel Assembly ······················································ 5

2-2.

Level Slider ········································································ 5

······························································ 6

4-1.

Circuit Boards Location ····················································· 9

4-2.

Block Diagrams
• Main Section ·································································· 10
• Power Section ································································ 11

4-3.

Printed Wiring Board  Main Section ································ 13

4-4.

Schematic Diagram  Main (1/2) Section ·························· 14

4-5.

Schematic Diagram  Main (2/2) Section ·························· 15

4-6.

Schematic Diagram  Power Amp Section ························ 16

4-7.

Printed Wiring Board  Power Amp Section ······················ 17

4-8.

Schematic Diagram  Display Section ······························· 18

4-9.

Printed Wiring Board  Display Section ···························· 19

4-10. Schematic Diagram  Sliding Panel Section ······················ 20
4-11. Printed Wiring Board  Sliding Panel Section ··················· 21
4-12. Schematic Diagram  Surround Amp Section ···················· 22
4-13. Printed Wiring Board  Surround Amp Section ················· 23
4-14. Printed Wiring Board  Trans Section ································ 24
4-15. Schematic Diagram  Trans Section ·································· 25
4-16. Schematic Diagram  AV/Mic Section ······························· 26
4-17. Printed Wiring Board  AV/Mic Section ···························· 27
4-18. IC Block Diagrams ··························································· 28
4-19. IC Pin Function ································································ 31

5-1.

Case and Sliding Panel Section ········································ 34

5-2.

Front Panel Section ·························································· 35

5-3.

Slide Mechanism Section ················································· 36

5-4.

Circuit Boards and Back Panel Section ···························· 37

········································· 38

3

1

 MOVIE button

2

 MUSIC button

3

 GAME button

4

 PLACE button

5

 P FILE button

6

 EFFECT ON/OFF button

7

 OPEN/CLOSE button

8

 TUNER BAND button

9

 STEREO/MONO button

q;

 MEMORY button

qa

 KARAOKE PON/MIX button

qs

 MIC LEVEL/ECHO VOL dial

qd

 MIX MIC1 jack

qf

 GROOVE button

qg

 VOLUME dial

qh

  

M

 + button

qj

 ENTER/NEXT button

qk

 MULTI JOG STATION dial

ql

 

m

 – button

w;

 NON-STOP button

wa

 EDIT button

ws

 FLASH button

wd

 PLAY MODE button

wf

 REPEAT button

wg

 PHONES jack

wh

 LOOP button

wj

 CLOCK/TIMER SET button

wk

 TIMER SELECT button

wl

 FUNCTION button

e;

 PROLOGIC button

ea

 DSP button

es

 DBFB button

ed

 DISPLAY/DEMO button

ef

 I/

1

 (POWER) button

eg

 MIX MIC2 jack

eh

 KEY CONTROL (

#

)

ej

 KEY CONTROL (

2

)

1

2

3

4

5

6

7

8

9

q;

qa

qs

qd

qf

eg

qg

qj qh

wg

wh

wj

wk

wl

ed

ef

e;

ej

eh

qk

ql

wa

wd

wf

w;

ea

es

ws

4

1

 SYSTEM CONTROL jack

2

 ANTENNA terminal

3

 CENTER SPEAKER terminal

4

 REAR SPEAKER terminal

5

 MONITOR OUT jack

6

 FRONT SPEAKER terminal

7

 MD/VIDEO 1 jack

2

4

5

3

1

6

7