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E Model

Chinese Model

MICROFILM

This set is the tuner and amplifier
section in MHC-V5550/V7770AV.

The following measured at AC 230V 50/60 Hz
DIN power output (Rated) (FRONT)

95 + 95W (6 

Ω

 at 1kHz DIN)

Continuous RMS power output (Reference)

FRONT SPEAKER: 110 + 110W
(6 

Ω

 at 1kHz, 10% THD)

CENTER SPEAKER: 55W
(8 

Ω

 at 1kHz, 10% THD) (V7770)

REAR SPEAKER: 35 + 35W
(8 

Ω

 at 1kHz, 10% THD) (V7770)

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

100 + 100W (6 

Ω

 at 1kHz DIN)

Continuous RMS power output (Reference)

FRONT SPEAKER: 120 + 120 W
(6 

Ω

 at 1kHz, 10% THD)

CENTER SPEAKER: 60W
(8 

Ω

 at 1kHz, 10% THD) (V7770)

REAR SPEAKER: 40 + 40W
(8 

Ω

 at 1kHz 10% THD) (V7770)

Peak music power output 2400W (V7770)

2000W (V5550)

Inputs

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

Ω

AV INPUT AUDIO (phone 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

 (V7770)

REAR SPEAKER:
accepts impedance of 8 to 16

Ω

SUPER WOOFER:
Voltage 1V, impedance 1k

Ω

Photo : STR-V7770

FM stereo, FM/AM superheterodyne tuner

Tuning range

87.5 – 108.0MHz

Aerial

FM lead aerial

Aerial 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
Chinese, Thai models:

220V AC, 50/60Hz

Other models:

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

Power consumption

300W

Dimensions (w/h/d)

Approx. 288 

×

 205 

×

 375mm

Mass

Approx. 8.8kg

Design and specifications are subject to change without notice.

— 2 —

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

2-1.

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

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

4-1.

Circuit Boards Location ··················································· 10

4-2.

Block Diagrams
• Main Section ·································································· 11
• Power Section ································································ 13

4-3.

Printed Wiring Board – Main Section – ··························· 17

4-4.

Schematic Diagram
– Main (1/2) Section (V5550 Model) – ···························· 19

4-5.

Schematic Diagram
– Main (1/2) Section (V7770 Model) – ···························· 21

4-6.

Schematic Diagram – Main (2/2) Section – ····················· 23

4-7.

Schematic Diagram – Power Amp Section – ··················· 25

4-8.

Printed Wiring Board – Power Amp Section – ················· 27

4-9.

Schematic Diagram – Display Section – ·························· 29

4-10. Printed Wiring Board – Display Section – ······················· 31
4-11. Schematic Diagram – Sliding Panel Section – ················· 33
4-12. Printed Wiring Board – Sliding Panel Section – ·············· 35
4-13. Schematic Diagram – Surround Amp Section – ··············· 37
4-14. Printed Wiring Board – Surround Amp Section – ············ 39
4-15. Printed Wiring Board – Trans Section – ··························· 41
4-16. Schematic Diagram – Trans Section – ····························· 43
4-17. Schematic Diagram – AV/Mic Section – ·························· 44
4-18. Printed Wiring Board – AV/Mic Section – ······················· 45
4-19. IC Block Diagrams ··························································· 46
4-20. IC Pin Function ································································ 49

5-1.

Case and Sliding Panel Section ········································ 52

5-2.

Front Panel Section ·························································· 53

5-3.

Slide Mechanism Section ················································· 54

5-4.

Circuit Boards and Back Panel Section ···························· 55

········································· 56

!

!

V5550: Hong Kong, Malaysia, Singapore,

Indonesia

4-900-848-5π

V7770: Hong Kong, Malaysia, Singapore

4-900-848-6π

V7770: Thai, Chinese

4-900-848-7π

V5550: Chinese

4-900-848-8π

MODEL

PART No.

LABEL MODEL NUMBER

No.

— 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

!º

 MEMORY button

!¡

 KARAOKE PON/MIX button

!™

 MIC LEVEL/ECHO VOL dial

!£

 MIX MIC1 jack

!¢

 GROOVE button

!∞

 VOLUME dial

!§

  

)

 + button

!¶

 ENTER/NEXT button

!•

 MULTI JOG STATION dial

!ª

 

0

 – button

@º

 NON-STOP button

@¡

 EDIT button

@™

 FLASH button

@£

 PLAY MODE button

@¢

 REPEAT button

@∞

 PHONES jack

@§

 LOOP button

@¶

 CLOCK/TIMER SET button

@•

 TIMER SELECT button

@ª

 FUNCTION button

#º

 PROLOGIC button

#¡

 DSP button

#™

 DBFB button

#£

 DISPLAY/DEMO button

#¢

 I/

u

 (POWER) button

#∞

 MIX MIC2 jack

#§

 KEY CONTROL (

n

)

#¶

 KEY CONTROL (

˜

)

1

2

3

4

5

6

7

8

9

!º

!¡

!™

!£

!¢

#∞

!∞

!¶ !§

@∞

@§

@¶

@•

@ª

#£

#¢

#º

#¶

#§

!•

!ª

@¡

@£

@¢

@º

#¡

#™

@™

Photo : STR-V7770

— 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

Photo : STR-V7770 (Chinese model)