Sony HCD-VX222 User manual

HCD-VX222
E Model SERVICE MANUAL
MINI HI-FI COMPONENT SYSTEM
— Continued on next page —
SPECIFICATIONS
• HCD-VX222 is the tuner, deck, CD
and amplifier section in MHC-
VX222.
Ver 1.2 2001.09
9-873-210-03
2001I0200-1
© 2001. 9
Sony Corporation
Home Audio Company
Shinagawa Tec Service Manual Production Group
Model Name Using Similar Mechanism NEW
CD CD Mechanism Type CDM58B-K6BD37A
Section Base Unit Name BU-K6BD37A
Optical Pick-up Name KSM-213DCP/Z-NP
Tape deck Model Name Using Similar Mechanism HCD-DX20/RG30
Section
Amplifier section
The following measured at AC 120, 220, 240 V
50/60 Hz
DIN power output (rated) 50 + 50 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
60 + 60 watts (6 ohms at
1 kHz, 10% THD)
Inputs
MD/VIDEO (AUDIO) IN (phono jacks):
voltage 450/250 mV,
impedance 47 kilohms
GAME (AUDIO) IN (phono jack):
voltage 450 mV,
impedance 47 kilohms
MIC 1/2 (mini jack): sensitivity 1 mV,
impedance 10 kilohms
Outputs
MD/VIDEO (AUDIO) OUT (phono jacks):
voltage 250 mV
impedance 1 kilohms
VIDEO OUT (phono jack):
max. output level
1Vp-p, unbalanced, Sync
negative, load impedance
75 ohms
S-VIDEO OUT (4-pin/mini-DIN jack):
Y: 1Vp-p, unbalanced,
Sync negative,
C: 0.286Vp-p,
load impedance 75 ohms
PHONES (stereo mini jack):
accepts headphones of
8 ohms or more
SPEAKER: accepts impedance of 6 to
16 ohms

2
HCD-VX222
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of soldering iron around 270˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE WITH
MARK 0ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
General
Power requirements
Thai model: 220 V AC, 50/60 Hz
Other models: 120 V, 220 V or
230 – 240 V AC,
50/60 Hz
Adjustable with voltage
selector
Power consumption 120 watts
Dimensions (w/h/d)
Approx. 280 x325 x421 mm
Mass Approx. 9.0 kg
Design and specifications are subject to change
without notice.
CD/VIDEO CD player section
System Compact disc and digital
audio and video system
Laser Semiconductor laser
( =780 nm)
Emission duration:
continuous
Wavelength 780 – 790 nm
Frequency response 2 Hz – 20 kHz (±0.5 dB)
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
Video color system format
NTSC, PAL
CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)
Wavelength 660 nm
Output Level –18 dBm
Tape deck section
Recording system 4-track 2-channel stereo
Frequency response 40 – 13,000 Hz (±3 dB),
using Sony TYPE I
cassette
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
Tourist model: 76.0 – 108.0 MHz
Other models: 87.5 – 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 ohm unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
Middle Eastern and Philippine models:
531 – 1,602 kHz (with the
interval set at 9 kHz)
Other models: 531 – 1,602 kHz (with the
interval set at 9 kHz)
530 – 1,710 kHz (with the
interval set at 10 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz

3
HCD-VX222
TABLE OF CONTENTS
1. SERVICE NOTE .............................................................. 4
2. GENERAL ......................................................................... 5
3. DISASSEMBY ................................................................. 7
4. TEST MODE................................................................... 13
5. ELECTRICAL ADJUSTMENTS .............................. 17
6. DIAGRAMS
6-1.Circuit Board Location .................................................. 21
6-2.Block Diagrams –Tuner Section–................................. 22
Block Diagrams –Main Section–................................. 23
Block Diagrams –Video Section–................................ 24
6-3.Printed Wiring Board –Driver Section–........................ 25
6-4.Schematic Diagram –Driver Section–.......................... 25
6-5.Printed Wiring Board –BD Section–............................ 26
6-6.Schematic Diagram –BD Section –.............................. 27
6-7.Printed Wiring Board –Main Section–.......................... 28
6-8.Schematic Diagram –Main Section (1/5) –................... 29
6-9.Schematic Diagram –Main Section (2/5) –................... 30
6-10. Schematic Diagram –Main Section (3/5) –................ 31
6-11. Schematic Diagram –Main Section (4/5) –................ 32
6-12. Schematic Diagram –Main Section (5/5) –................ 33
6-13. Printed Wiring Board –Power AMP Section–........... 34
6-14. Schematic Diagram –Power AMP Section–.............. 35
6-15. Printed Wiring Board –Panel Section–...................... 36
6-16. Schematic Diagram –Panel Section–......................... 37
6-17. Printed Wiring Board –Trans Section–...................... 38
6-18. Schematic Diagram –Trans Section–......................... 39
6-19. Printed Wiring Board –Video CD Section–............... 40
6-20. Schematic Diagram –Video CD Section (1/2) –........ 41
6-21. Schematic Diagram –Video CD Section (2/2) –........ 42
6-22. IC Pin Function Description ....................................... 43
6-23. IC Block Diagrams ..................................................... 48
7. EXPLODED VIEWS
7-1.Main Section .................................................................. 52
7-2.Front Panel Section ........................................................ 53
7-3.Chassis Section .............................................................. 54
7-4.CD Mechanism Deck Section ........................................ 55
8. ELECTRICAL PARTS LIST ...................................... 56

4
HCD-VX222 SECTION 1
SERVICE NOTE
1 Connector
13p (CN712)
2 Cut the seven melted-connection points
with a cutting plier.
4 Cut the six melted-connection points
with a cutting plier.
3 Panel board
5 Key boar
d
Panel board
(ten screw holes)
Key board
(eight screw holes)
Screw hole
In order to re-install the panel board and the key board,
fix them by using the screws (+BVTP 2.6
× 8 ) respectively.
Screw in to the respective screw holes.
Do not tighten the screws excessively.
* The panel board and the key board only are connected to the front panel
by means of hot-melting the plastics.
Note for installing the panel board and the key board
REMOVING THE PANEL BOARD AND THE KEY BOARD
Hot melt

5
HCD-VX222
This section is extracted from
instruction manual.
SECTION 2
GENERAL

6
HCD-VX222
Setting the time
1 Turn on the system.
2 Press CLOCK/TIMER SET on the
remote.
Proceed to step 5 when “CLOCK” appears
in the display.
3 Press vor V
vV
V
repeatedly to select “SET
CLOCK”.
4 Press ENTER.
5 Press or
v
repeatedly to set the hour.
6 Press .
The minute indication flashes.
7 Press or repeatedly to set the
minute.
8 Press ENTER.
Tip
If you made a mistake or want to change the time,
start over from step 2.
Note
The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.
B

7
HCD-VX222
SECTION 3
DISASSEMBLY
3-1. CASE (SIDE-R, SIDE-L, TOP)
Note : Disassemble the unit in the order as shown below.
Note : Follow the disassembly procedure in the numerical order given.
Driver board, Moter board, Address sensor board
Chassis section
Case (Side-R, Side-L, Top)
CD door
Front panel section
CD mechanism deck
(CDM58B)
Key boardPanel boardTape mechanism deck
Sub trans board, Video out board, Back panel, Power transformer
(Trans board)
Main board, Power amp board
Video board, Base unit, BD board
Set
Case (Side-R)
Case (Side-L)
5
qd
qs
qs
q;
Case (Top)
6 Two screws (Case 3 TP2)
8 Screw
(+BVTP 3
× 10)
3 Screw
(+BVTP 3
× 10
)
9 Screw
(+BVTT 3
× 8)
4 Screw
(+BVTT 3
× 8)
1 Two screws
(Case 3 TP2)
qa Two screws (+BVTP 3 × 12)
7 Screw (Case 3 TP2)
2 Screw (Case 3 TP2)

8
HCD-VX222
3-2. CD DDOR
3-3. CD MECHANISM DECK (CDM58B), FRONT PANEL SECTION, CHASSIS SECTION
2 Pull-out the disc tray.
1 Turn the pulley to the direction of arrow.
pulley
CD door
Front panel side
CD mechanism deck (CDM58B)
3
qg
qf
7
CD mechanism deck (CDM58B)
Front panel section
qs Connector (B Deck)
qa Connector (A Deck)
9 Connector
(CN714)
4 Screw
(+BVTP3X10
)
8 Wire (flat type)(CN2)
1 Wire (flat type)
(CN102)
2 Connector
(CN701)
3 Connector
(CN301)
qd Three screws (+BVTP 3 × 6 )
q; Screw
(+BVTP 3
× 10)
5 Screw
(+BVTP 3
× 10)
6 Screw (+BVTP 3 × 10)
Chassis section

9
HCD-VX222
3-4. TAPE MECHANISM DECK
3-5. PANEL BOARD
1 Six screws
(+BVTP 2.6
× 8
)
2 Tape mechanism deck
1 Volume knob
2 Vol knob ring
4 Connector
(CN712)
Note: When attching the panel board,
refer to "Service Note" on page 4.
6 Panel board
3
5 Cut the seven melted-connection points with a cutting plier.

10
HCD-VX222
3-6. KEY BOARD
3-7. SUB TRANS BOARD, VIDEO OUT BOARD, BACK PANEL, POWER TRANSFORMER (TRANS BOARD)
Note: When attching the Key board,
refer to "Service Note" on page 4.
2 Key board
1 Cut the six melted-connection points with a cutting plier.
qf Two screws
(+BVTT 4
× 6)
qa Five screws
(+BVTP 3
× 10
)
q; Two screws
(+BVTT 3
× 6)
qs
1 Two screws
(+BVTP 3
× 10)
8 Screw (+BVTP 3 × 10)
Back panel
qg Two screws
(+BVTT 4
× 6)
qh Power transformer
(T911)
qd Connector (CN915)
3 Connector (CN2)
5 Connector
(CN903)
4 Connector
(CN901)
2 Cover (Duct)
9 Video out board
7 Sub trans
board
Trans board
6 Two screws
(+BVTP 3
× 10)