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Sony HCD-vx550 Service Manual
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Sony HCD-vx550 Service Manual

Sony HCD-vx550 Service Manual

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SERVICE MANUAL
HCD-VX550 is the Amplifier, Video
CD player, Tape Deck and Tuner
section in MHC-VX550.
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
"DOLBY" and the double-D symbol a are trade-
marks of Dolby Laboratories Licensing Corporation.
Amplifier section
The following measured at AC 120, 220, 240 V 50/60
Hz
DIN power output (rated)110 + 110 W
(8 Ω at 1 kHz, DIN)
Continuous RMS power output (reference)
140 + 140 W
(8 Ω at 1 kHz, 10% THD)
Inputs
MD IN:
voltage 450 mV,
(phono jacks)
impedance 47 kΩ
VIDEO (AUDIO) IN:
voltage 250 mV,
(phono jacks)
impedance 47 kΩ
MIC 1/2 (phone jack):
sensitivity 1 mV, impedance
10 kΩ
MICROFILM
HCD-VX550
Model Name Using Similar Mechanism
CD Mechanism Type
CD
Section
Base Unit Name
Optical Pick-up Name
Model Name Using Similar Mechanism
Tape deck
Section
Tape Transport Mechanism Type
SPECIFICATIONS
Outputs
MD OUT (phono jacks): voltage 250 mV
impedance 1 kΩ
VIDEO OUT (phono jack):
max,output level
1Vp-p, unbalanced, Sync
negative, load impedance
75 Ω
S-VIDEO OUT (4-pin/ mini-DIN jack):
Y: 1Vp-p, unbalanced,
Sync negative,
C: 0.286Vp-p,
load impedance 75 Ω
PHONES (stereo phone jack):
accepts headphones of 8 Ω
or more
SPEAKER:
accepts impedance of 8 to
16 Ω
SUPER WOOFER
Voltage 1 V, impedance
Ω
k
MINI Hi-Fi COMPONENT SYSTEM
Chinese Model
SUPER VIDEO CD/VIDEO CD
/CD player section
System
Compact disc and digital
audio and video system
Laser
Semiconductor laser
(λ=780nm)
Emission duration:
continuous
Laser output
Max. 44.6 µW*
*This output is the value
measured at distance of 200
mm from the objective lens
surface on the Optical Pick-up
Block with 7 mm aperture.
Frequency response
2 Hz - 20 kHz (±0.5 dB)
Wavelength
780 -790 nm
Signal-to-noise ratio
More than 90 dB
Dynamic range
More than 90 dB
1
Video color system format
NTSC, PAL
Continued on next page
NEW
CDM38LH-5BD36L
BU-26BD36L
KSS-213D/Q-RP
HTC-V5550
TCM-230AWR2

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  • Page 1 HCD-VX550 SERVICE MANUAL Chinese Model HCD-VX550 is the Amplifier, Video CD player, Tape Deck and Tuner section in MHC-VX550. Dolby noise reduction manufactured under license Model Name Using Similar Mechanism from Dolby Laboratories Licensing Corporation. CD Mechanism Type CDM38LH-5BD36L “DOLBY” and the double-D symbol a are trade- marks of Dolby Laboratories Licensing Corporation.

  • Page 2: Schematic Diagram

    HCD-VX550 7-4. SCHEMATIC DIAGRAM BD BOARD • Refer to page 29 for Waveforms. • Refer to page 45, 46 for IC Block Diagrams. (Page 26) • Voltages and waveforms are dc with respect to ground under no-signal conditions. no mark : CD STOP...
  • Page 3 HCD-VX550 7-5. SCHEMATIC DIAGRAM VIDEO (1/2) BOARD • Refer to page 29 for Waveforms. • Refer to page 52 for IC Pin Function Description. • Refer to page 28 for Printed Wiring Board. (Page 25) (Page 36) • Voltages and waveforms are dc with respect to ground under no-signal conditions.
  • Page 4 HCD-VX550 7-6. SCHEMATIC DIAGRAM VIDEO (2/2) BOARD • Refer to page 29 for Waveforms. • Refer to page 54 for IC Pin Function Description. • Refer to page 47 for IC Block Diagram. • Refer to page 28 for Printed Wiring Board.

  • Page 5: Cd Motor Section

    HCD-VX550 7-9. SCHEMATIC DIAGRAM CD MOTOR SECTION • Refer to page 46 for IC Block Diagrams. DISC TRAY ADDRESS DETECT DISC TRAY SLIDE CLOSE OPEN (Page 36) (DISC TRAY SLIDE) DISC TRAY TURN DISC IN DETECT DISC TRAY SENSOR SENSOR...
  • Page 6 HCD-VX550 7-11. SCHEMATIC DIAGRAM AUDIO BOARD • Refer to page 48 for IC Block Diagram. PB EQ AMP (PLAYBACK) (DECK A) PB LEVEL (L) (DECK A) PB LEVEL (R) (DECK A) PB EQ AMP (DECK B) PB LEVEL (L) (DECK B)

  • Page 7: Printed Wiring Board

    HCD-VX550 7-12. PRINTED WIRING BOARD LEAF SW BOARD • Refer to page 23 for Circuit Boards Location. • Semiconductor Location Ref. No. Location Ref. No. Location DECK B DECK A PLUNGER PLUNGER D141 E-10 Q111 D-10 D191 D-12 Q112 D-10...
  • Page 8 HCD-VX550 7-15. SCHEMATIC DIAGRAM MAIN (1/4) BOARD • Refer to page 35 for Printed Wiring Board. (Page 44) (Page 37) (Page 26) (Page 31) (Page 39) • Voltages are dc with respect to ground under no-signal (detuned) conditions. (Page 31)
  • Page 9 HCD-VX550 7-16. SCHEMATIC DIAGRAM MAIN (2/4) BOARD • Refer to page 35 for Printed Wiring Board. D3001 D3002 11ES2 11ES2 (Page 36) (Page 43) (Page 38) The components identified by (Page 39) mark ! or dotted line with mark • Voltages are dc with respect to ground under no-signal ! are critical for safety.
  • Page 10 HCD-VX550 7-17. SCHEMATIC DIAGRAM MAIN (3/4) BOARD • Refer to page 35 for Printed Wiring Board. (Page 36) (Page 37) (Page 39) (Page 43) CN371 (Page 41) (Page 39) (Page 33) • Voltages are dc with respect to ground under no-signal (Page 34) conditions.
  • Page 11 HCD-VX550 7-18. SCHEMATIC DIAGRAM MAIN (4/4) BOARD • Refer to page 35 for Printed Wiring Board. • Refer to page 49 for IC Pin Function Description. (Page 37) (Page 36) (Page 38) D+5V CD POWER (Page 42) (Page 38) • Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions.
  • Page 12 HCD-VX550 7-20. SCHEMATIC DIAGRAM PANEL BOARD • Refer to page 48 for IC Block Diagrams. • Refer to page 58 for IC Pin Function Description. (Page 42) (Page 38) • Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions.
  • Page 13 HCD-VX550 7-21. PRINTED WIRING BOARD CD SW/5V POWER BOARD 7-22. SCHEMATIC DIAGRAM CD SW/5V POWER BOARD • Refer to page 23 for Circuit Boards Location. (Page 41) (Page 40) (Page 35) 4.7 7.3 (Page 39)

  • Page 14: Transformer Board

    HCD-VX550 7-23. PRINTED WIRING BOARD TRANSFORMER BOARD • Refer to page 23 for Circuit Boards Location. • Semiconductor Location Ref. No. Location D971 D972 D973 (Page 35) Q971 (Page 35) 7-24. SCHEMATIC DIAGRAM TRANSFORMER BOARD (Page 37) • Voltages are dc with respect to ground under no-signal (Page 38) (detuned) conditions.
  • Page 15 HCD-VX550 7-25. PRINTED WIRING BOARD SURROUND BOARD 7-26. SCHEMATIC DIAGRAM SURROUND BOARD • Refer to page 47 for IC Block Diagrams. • Refer to page 23 for Circuit Boards Location. (Page 36) • Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions.

  • Page 16: Ic Block Diagrams

    7-27. IC BLOCK DIAGRAMS BD Board IC101 CXD3008Q 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 DVDD2 ASYE DIGITAL ASYMMETRY CORRECTOR DIGITAL DOUT LRCK D/A DIGITAL PCMD INTERFACE DEMODULATOR TES1 TEST1 ERROR...

  • Page 17: Motor (Turn) Board

    IC103 CXA2568M-T6 HOLD APC PD AMP LC/PD APC LD AMP – LD ON – – – HOLD SW AGC CONT AGC VTH 50µA RF BOT – – – – RFTC RF SUMMING AMP RF EQ AMP RF I RF O –...

  • Page 18: Video Board

    VIDEO BOARD IC509 PCM1727E-2/T2 384fs CLOCK MANAGER • DUAL PLL DGND PGND POWER SUPPLY SCKO1 SCKO2 NCKO LRCK AUDIO SCKO3 DATA INPUT DATA INTERFACE MODE CONTROL RSTB ZERO OPEN 8 TIME OVER SAMPLING DIGITAL FILTER • FUNCTION CONTROL 14 VOUTL MULTI LEVEL MULTI LEVEL ∆Σ...

  • Page 19: Audio Board

    AUDIO BOARD IC602 µPC1330HA INVERTER COMPARATER SW P1 CONT GND SW R1 GND SW P2 GND SW R2 PANEL BOARD IC604 NJU3716M-T2 IC603 BA3830F RESET RESET 18 17 16 15 14 13 REFERENCE CURRENT REFERENCE CURRENT CONTROL LINE NF CIRCUIT LINE IN BAND –...

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