Sony HCD-VX550 User manual
HCD-VX550
Chinese Model
SERVICE MANUAL
MINI Hi-Fi COMPONENT SYSTEM
MICROFILM
HCD-VX550 is the Amplifier, Video
CD player, Tape Deck and Tuner
section in MHC-VX550.
Continued on next page
SPECIFICATIONS
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol aare trade-
marks of Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM38LH-5BD36L
Base Unit Name BU-26BD36L
Optical Pick-up Name KSS-213D/Q-RP
Model Name Using Similar Mechanism HTC-V5550
Tape Transport Mechanism Type TCM-230AWR2
CD
Section
Tape deck
Section
Amplifier section
The following measured atAC 120, 220, 240 V 50/60
Hz
DIN power output (rated)110 + 110 W
(8 Ωat 1 kHz, DIN)
Continuous RMS power output (reference)
140 + 140 W
(8 Ωat 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
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, impedance1
kΩ
SUPERVIDEO 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
Video color system format
NTSC, PAL
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TEL 13942296513 QQ 376315150 892498299
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2
CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)
Wavelength 660 nm
Output Level –18 dBm
Tape player section
Recording system 4-track 2-channel stereo
Frequency response 40 - 13,000 Hz (±3 dB),
(DOLBY NR OFF) using Sony TYPE I cassette
40-14,000 Hz (± 3 dB),
using Sony TYPE II cassette
Tuner section
Fm stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5-108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 Ω unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
2 Band type: 531-1,602 kHz
(with the interval set at 9 kHz)
530-1,710 kHz
(with the interval set at 10 kHz)
3 Band type:
MW: 531-1,602 kHz
(with the interval set at 9 kHz)
530-1,710 kHz
(with the interval set at 10 kHz)
SW: 5.95-17.90 MHz
(with the interval set at 5 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements 220 V AC, 50/ 60 Hz
Power consumption: 160 W
Dimensions (w/h/d) Approx. 280 ×340 ×395 mm
Mass: Approx. 10.0 kg
Design and specifications are subject to change without notice.
TABLE OF CONTENTS
1. SERVICING NOTES·················································3
2. GENERAL .......................................................................... 5
3. DISASSEMBLY ................................................................ 8
4. TEST MODE................................................................... 11
5. MECHANICAL ADJUSTMENTS ............................ 14
6. ELECTRICAL ADJUSTMENTS
DECK Section .................................................................. 14
CD Section ....................................................................... 17
VIDEO Section................................................................. 17
7. DIAGRAMS
7-1. Block Diagram
CD SERVO Section .......................................................... 18
AUDIO/VIDEO CD Section ............................................ 19
TAPE DECK Section ....................................................... 20
MAIN Section .................................................................. 21
DISPLAY/KEY CONTROL/
POWER SUPPLY Section················································ 22
7-2. Circuit Board Location ····················································· 23
7-3. Printed Wiring Board BD Board .................................... 24
7-4. Schematic Diagram BD Board ....................................... 25
7-5. Schematic Diagram VIDEO Board (1/2)........................ 26
7-6. Schematic Diagram VIDEO Board (2/2)........................ 27
7-7. Printed Wiring Board VIDEO Board.............................. 28
7-8. Printed Wiring Boards CD MOTOR Section ................. 30
7-9. Schematic Diagram CD MOTOR Section...................... 31
7-10. Printed Wiring Board AUDIO Board ............................. 32
7-11. Schematic Diagram AUDIO Board ................................ 33
7-12. Printed Wiring Board LEAF SW Board ......................... 34
7-13. Schematic Diagram LEAF SW Board............................34
7-14. Printed Wiring Board MAIN Board ............................... 35
7-15. Schematic Diagram MAIN Board (1/4) ......................... 36
7-16. Schematic Diagram MAIN Board (2/4) ......................... 37
7-17. Schematic Diagram MAIN Board (3/4) ......................... 38
7-18. Schematic Diagram MAIN Board (4/4) ......................... 39
7-19. Printed Wiring Board PANEL Board ............................. 40
7-20. Schematic Diagram PANEL Board ................................ 41
7-21. Printed Wiring Board CD SW/5V POWER Board ........ 42
7-22. Schematic Diagram CD SW/5V POWER Board ........... 42
7-23. Printed Wiring Board TRANSFORMER Board ............ 43
7-24. Schematic Diagram TRANSFORMER Board ............... 43
7-25. Printed Wiring Board SURROUND Board .................... 44
7-26. Schematic Diagram SURROUND Board....................... 44
7-27. IC Block Diagrams ........................................................... 45
7-28. IC Pin Function Description............................................. 49
8. EXPLODED VIEWS..................................................... 60
9. ELECTRICAL PARTS LIST..................................... 68
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3
SECTION 1
SERVICING NOTES
SELF-DIAGNOSIS
This unit is equipped with a self-diagnosis function.
The function is used for diagnosing the conditions of the circuits of
the VIDEO board.
The circuits can be determined if normal or abnormal by the lighting
of D502 of the VIDEO board.
Lighting of D502
When lit : Operates normally
Blinks repeatedly : The circuit may be faulty.
VIDEO Board (SIDE B)
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.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-
ing 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
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
SAFETY-RELATED COMPONENTWARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINEWITH
MARK !ON THE SCHEMATIC DIAGRAMS AND INTHE 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.
IC505
CN501
CN502
SL501
SL50
3
100
81
1
30
31
50 51 80
SL502
D502
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NOTE FOR INSTALLATION (ROTARY ENCODER)
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS’ OFF.
1
Remove the Case.
3
Pull-out the disc tray.
2
Turn the cam to the
direction of arrow.
BU cam
Groove Section A
Note:When attaching the Base unit, Insert th
e
section A into the groove of BU cam.
Note:When attaching the BU cam,
engage the Rotary encoder
switch as shown in the figure.
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TEL 13942296513 QQ 376315150 892498299
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5
SECTION 2
GENERAL
• LOCATION OF CONTENTS
Front View
11/u button
29TAPE A button and indicator
3(STANDBY) DEMO button
4(TAPE A button and indicator
5DISC 1 button
69TAPE B button and indicator
7DISC 2 button
8(TAPE B button and indicator
9DISC 3 button
0pbutton
qa DISC SKIP, EX-CHANGE button
qs ^CD button and indicator
qd §button
qf SVCD/VCD indicator
qg PBC indicator
qh PBC OFF indicator
qj TUNER/BAND button
13 5 7 9 qa
qs08642
qd
qf
qh
qj
qk
ql
w;
wa
wswdwfwgwhwj
wk
wl
e;
ea
es
ed
ef qg
qk REC PAUSE/START button and indicator
ql HI-DUB button
w; CD SYNC button
wa PHONE jack
ws VOLUME knob
wd + )button and indicator
wf JOG dial and indicator
wg – 0button and indicator
wh CD FLASH button
wj CD LOOP button
wk MIC 2 jack
wl MIC 1 jack
e; MIC LEVEL knob
ea ECHO LEVEL knob
es FUNCTION button
ed SYNC EQ indicator
ef EFFECT indicator
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6
eg EDIT/DIRECTION
TUNER MEMORY button
eh PLAY MODE, DOLBY NR button
ej REPEAT STEREO/MONO button
ek FILE SELECT button
el SELECT button
r; RETURN button
ra PREV button
rs NEXT button
rd CD NON-STOP button and indicator
rf KARAOKE PON/MPX button
rg SYNC BASS H indicator
eg eh ej ek el r; ra rs rd rf
rg
rh
rj
rk
rlt;tatstdtftgth
rh SYNC BASS L indicator
rj SYNC EQ button
rk SYNC BASS button
rl CINEMA SPACE/SURROUND button
t; DBFB button
ta ENTER/NEXT button and indicator
ts GROOVE button and indicator
td SPECTRUM ANALYZER button
tf TIMER SELECT button and indicator
tg CLOCK/TIMER SET button
th DISPLAY button
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TEL 13942296513 QQ 376315150 892498299
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8
SECTION 3
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
3-1. COVER
3-2. LOADING PANEL ASS’Y
3
two screws
(case 3TP2) (3
×
8)
2
screw
(case 3TP2) (3
×
12)
1
three screws
(BVTP3
×
8)
6
cover
2
screw
(case 3TP2) (3
×
12)
3
two screws
(case 3TP2) (3
×
8)
5
4
4
3
loading panel ass’y
2
Pull-out
the disc tray.
1
Turn the cam-in the
direction of the arrow
A
.
A
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9
3-3. FRONT PANEL SECTION
3-4. VIDEO BOARD, CD MECHANISM DECK SECTION (CDM38LH-5BD36L)
2
screw
(BVTT3
×
6
)
2
screw
(BVTT3
×
6)
4
screw
(BVTT3
×
10)
6
front panel section
4
screw
(BVTP3
×
10)
5
two screws
(BVTT3
×
6)
3
lug
3
two lugs
1
wire (flat type)
(15 core) (32 cm) (CN303)
1
wire (flat type) (17 core)
(CN304)
1
wire (flat type)
(23 core) (23 cm) (CN501)
6
screw
(BVTP3
×
10)
7
two screws
(BVTP3
×
8)
5
chassis
4
screw
(BVTP3
×
8)
9
two connectors
(CN392, 393)
2
two screws
(BVTP3
×
8)
6
screw
(BVTP3
×
10)
8
Remove the CD mechanism
deck (CDM38LH-5BD36L)
in the direction of arrows
A
–
B
.
B
A1
wire (flat type)
(15 core) (17 cm) (CN502)
1
wire (flat type)
(25 core) (18 cm)
(CN501)
2
screw
(BVTP3
×
8)
3
VIDEO
board
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10
3-5. TAPE MECHANISM DECK SECTION (TCM-230AWR2)
3-6. MAIN BOARD
1
Push the cassette lid.
4
tape mechanism deck section
(TCM-230AWR2)
1
Push the cassette lid.
2
Open two
cassette lids.
3
two screws
(BVTP2.6
×
8)
3
three screws
(BVTP2.6
×
8)
5
five screws
(BVTP3
×
8
)
4
two screws
(BVTP3
×
8)
7
connector
(CN403)
3
two screws
(BVTP3
×
8)
2
connector
(CN953)
2
connector
(CN952)
6
Remove the MAIN board
in the direction of the arrow.
1
wire (flat type)
(15 core)(15 cm)(CN371)
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11
SECTION 4
TEST MODE
[MC Cold Reset]
• The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. Turn the power ON or set to the DEMO mode.
2. Press three buttons of p, ENTER/NEXT , and 1/u
simultaneously.
3. The set is reset, and displays “COLD RESET”, then becomes
DEMO mode.
[MC Hot Reset]
• This mode resets the set with the preset data kept stored in the
memory. The hot reset mode functions same as if the power
cord is plugged in and out.
Procedure:
1. Turn the power ON or set to the DEMO mode.
2. Press three buttons of p, ENTER/NEXT , and DISC1
simultaneously.
3. The set is reset, and becomes standby state.
[Change-over the AMTuning Interval]
(EXCEPT Saudi Arabia model)
• The AM tuning interval can be changed over 9 kHz or 10 kHz.
Procedure:
1. Press the 1/ubutton to turn the power ON.
2. Select the function “TUNER”, and press the TUNER/BAND
button to select the BAND “AM (MW)”.
3. Press the 1/ubutton to turn the power OFF.
4. Press the ENTER/NEXT and 1/ubuttonssimultaneously, and
the display on the fluorescent indicator tube changes to “AM 9
k STEP” or “AM 10 k STEP”, and thus the tuning interval is
changed over.
[CD Delivery Mode]
• This mode moves the optical pick-up to the position durable to
vibration. Use this mode when returning the set to the customer
after repair.
Procedure:
1. Press the 1/ubutton to turn the power ON.
2. Press the CD LOOP and 1/ubuttons simultaneously.
3. A message “LOCK” is displayed on the fluorescent indicator
tube, and the CD delivery mode is set.
[LED and Fluorescent Indicator Tube All Lit, Key Check
Mode]
Procedure:
1. Press three buttons of p, ENTER/NEXT , and DISC1
simultaneously.
2. LEDs and fluorescent indicator tube are all turned on.
Press the DISC1 button, and the key check mode is activated.
3. In the key check mode, the fluorescent indicator tube displays
“K 0 J0V0”. Each time a button is pressed, “K” value increases.
However, once a button is pressed, it is no longer taken into
account.
“J” value increases like 1, 2, 3 ... if turn the JOG dial clockwise,
or it decreases like 0, 9, 8 ... if turn the JOG dial
counterclockwise.
“V” value increases like 1, 2, 3 ... if turn the VOLUME dial
clockwise, or it decreases like 0, 9, 8 ... if turn the JOG dial
counterclockwise.
4. To exit from this mode, press three buttons in the same manner
as step 1, or disconnect the power cord.
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TEL 13942296513 QQ 376315150 892498299
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12
[Aging Mode]
This mode can be used for operation check of tape deck section.
Tape deck section work in parallel.
• If an error occurred:
The aging operation stops and display then status.
• If no error occurs:
The aging operation continues repeatedly.
Procedure:
1. Load the tapes into the decks A and B respectively.
2. Press the FUNCTION button to select the function “CD”.
3. Press the PLAY MODE button to set the “ALL DISCS” mode,
and press the REPEAT button to “REPEAT” off.
4. Press three buttons of p, ENTER/NEXT , and DISC SKIP/
EX-CHANGE simultaneously.
5. The aging mode is activated, if the indicator of disc tray number
on the fluorescent indicator tube is blinking.
6. To exit from the aging mode, press the 1/ubutton to turn the
power OFF and operate the cold reset. (Refer to the “MC Cold
Reset”)
1. Display at the Aging Mode
• Display operating state of tape deck section alternately.
• If an error occurred, stop display.
2. Tape Deck Section
• The sequence during the aging mode is following as below.
• If an error occurred, stop display that step.
Aging mode sequence (Tape deck section) :
Rewind the tape A and B
“TAPE A AG-1”
Shut off
FWD play the tape A
“TAPE A AG-2”
2 minutes
Fast forward the tape A
“TAPE A AG-3”
Shut off or 20 seconds
REV play the tape A
“TAPE A AG-4”
2 minutes
Rewind the tape A
“TAPE A AG-5”
Shut off
FWD play the tape B
“TAPE B AG-2”
2 minutes
Fast forward the tape B
“TAPE B AG-3”
Shut off or 20 seconds
REV play the tape B
“TAPE A AG-4”
2 minutes
Rewind the tape B
“TAPE B AG-5”
Shut off
Note: “TAPE *AG-*” is display of each step.
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13
[VIDEO CD Color-bars Mode]
On this mode, the data of the color-bars signal as a picture signal
and the 1 kHz sine wave signal as a sound signal are output by the
mechanismcontroller (IC505) forthe videoCD signal check. When
measurement of the voltage and waveform on the VIDEO board,
perform it in this mode.
Forreference, the color-bars signalcan be observedatJ502 (VIDEO
OUT) and the sound signal can be observed at J101 (VIDEO/MD
(AUDIO) OUT) using an oscilloscope.
Procedure:
1. Short the both ends of the land of SL503 of the VIDEO board.
2. Turn the power on. Press the FUNCTION button to select CD.
3. The color-bars appears when the CD is in stop status, and it
disappears when the CD goes in play status.
4. After measuring, remove the lead wire connected.
VIDEO board (SIDE B)
IC505
CN501
CN502
SL501
SL503
10081 1
30
3150
51
80
SL502
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14
SECTION 5
MECHANICAL ADJUSTMENTS SECTION 6
ELECTRICAL ADJUSTMENTS
1. Demagnetize the record/playback head with a head
demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
parts adjust.
4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
5. The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)
6. The adjustments should be performed for both L-CH and R-
CH.
7. Switches and controls should be set as follows unless otherwise
specified.
8. Set to the DOLBY NR OFF.
9. Set to the test mode.
(1) Press the 1/ubutton to turn the power ON.
(2) Select the function “TAPE A or B”.
(3) Press the button of p, ENTER/NEXT , and DISC3
simultaneously, to set the tape deck test mode and blink
theindicator of disctraynumber on thefluorescentindicator
tube.
(4) To exit from the test mode, press the 1/ubutton.
• Test Tape
Record/Playback Head Azimuth Adjustment
Note: Perform this adjustments for both decks
Procedure:
1. Mode: Playback (FWD)
Tape Signal Used for
P-4-A100 10 kHz, -10 dB Azimuth Adjustment
WS-48B 3 kHz, 0 dB Tape Speed Adjustment
P-4-L300 315 Hz, 0 dB Level Adjustment
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads pinch rollers
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head
demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Measurement
0 dB = 0.775 V
DECK SECTION
DECK A DECK B
set
MAIN board
MD OUT jack (J101)
L-CH, R-CH
+
–
level mete
r
test tape
P-4-A100
(10 kHz, – 10 dB)
31 to 71 g • cm
(0.43 - 0.98 oz • inch)
2 to 6 g • cm
(0.03 - 0.08 oz • inch)
31 to 71 g • cm
(0.43 - 0.98 oz • inch)
2 to 6 g • cm
(0.03 - 0.08 oz • inch)
71 to 143 g • cm
(0.99 - 1.99 oz • inch)
100 g or more
(3.53 oz or more)
100 g or more
(3.53 oz or more)
Mode
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Torque meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Meter reading
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15
2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw so
that outputs match within 1dB of peak.
3. Mode: Playback
4. Repeat step 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
Screw
position
L-CH
peak
within
1dB
Output
level
L-CH
peak R-CH
peak
within
1dB
Screw
position
R-CH
peak
set
test tape
P-4-A100
(10 kHz, – 10 dB)
R-CH
oscilloscope
L-CH
R-CH
VH
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good wrong
MAIN board
MD OUT jack (J101)
L-CH
Tape Speed Adjustment DECK B
Mode: Playback
1. Insert the WS-48B into the deck B.
2. Press the (button on the deck B.
3. Press the HI-DUB button in playback mode.
Then at HIGH speed mode.
4. Adjust RV1001 on the LEAF SW board do that frequency
counter reads 6,000 ± 180 Hz.
5. Press the HI-DUB button.
Then back to NORMAL speed mode.
6. Adjust RV1002 on the LEAF SW board so that frequency
counter reads 3,000 ± 90 Hz.
Adjustment Location: LEAF SW board
Sample value of Wow and Flutter: 0.3% or less W.RMS (JIS)
(WS-48B)
Playback level Adjustment DECK A DECK B
Procedure:
Mode: Playback
Deck A is RV311 (L-CH) and RV411 (R-CH), Deck B is RV301
(L-CH) and RV401 (R-CH) so that adjustment within specification
values as follows.
Specification Values:
J101 PB level: 301.5 to 338.3 mV (-8.2 to -7.2 dB) level
difference between the channels: within ± 0.5 dB
Adjustment Location: AUDIO board
forward
reverse
+
–
set
test tape
WS-48B
(3 kHz, 0 dB)
MAIN board
MD OUT jack (J101)
L-CH, R-CH
frequency counter
+
–
set
test tape
P-4-L300
(315 Hz, 0 dB)
MAIN board
MD OUT jack (J101)
L-CH, R-CH
level mete
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16
REC Bias Adjustment DECK B
Procedure:
1. Mode: Record
FUNCTION: VIDEO
2. Mode: Playback
3. Confirm playback the signal recorded in step 1 become
specification values as follows.
If these values are out of specification values, adjust the RV341
(L-CH) and RV441 (R-CH) on theAUDIO board to repeat steps
1and 2.
Specification values: Playback output of 315 Hz to playback
output of 10 kHz: ± 0.5 dB
Adjustment Location: AUDIO board
REC Level Adjustment DECK B
Procedure:
1. Mode: Record
FUNCTION: VIDEO
2. Mode: Playback
3. Confirm playback the signal recorded in step 1 become
specification values as follows.
If these values are out of specification values, adjust the RV301
(L-CH) and RV351 (R-CH) on the MAIN board to repeat steps
1 and 2.
Specification values:
J101 PB level: 47.2 to 53.0 mV (- 24.3 to - 23.3 dB)
Adjustment Location: MAIN board
MAIN BOARD (Conductor Side)
AUDIO BOARD (Component Side)
LEAF SW BOARD (Component Side)
attenuator
set
MAIN board
VIDEO (AUDIO) IN jack (J101)
L-CH, R-CH
1) 315 Hz
2) 10 kHz 50 mV (– 23.8 dB)
600
Ω
blank tape
CN-123
AF OSC
+
–
set
recorded
portion
MAIN board
MD OUT jack (J101)
L-CH, R-CH
level mete
r
set
MAIN board
VIDEO (AUDIO) IN jack (J101)
L-CH, R-CH
315 Hz, 50 mV (– 23.8 dB) blank tape
CS-123
600
Ω
attenuator
AF OSC
+
–
set
recorded
portion
MAIN board
MD OUT jack (J101)
L-CH, R-CH
level mete
r
RV301
L
RV351
R
IC301 REC LEVEL
J101
VIDEO (AUDIO) IN
(L/R)
MD OUT
(L/R)
RV401
RV301 RV341 RV311 RV411
IC602 CN601
LRRL
RV441
PB LEVEL
– DECK B –
REC BIAS
LR
PB LEVEL
– DECK A –
TAPE SPEED
RV1002 RV1001
(NORMAL) (HIGH)
CN1001
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1717
Note:
1. CD Block is basically designed to operate without adjustment. There-
fore, check each item in order given.
2. UseYEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10 MΩimpedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
S-Curve Check
Procedure:
1. Connect oscilloscope to TP (FE).
2. Connect between TP (FE1) and TP (VC) by lead wire.
3. Connect between TP (AGCCON) and TP (GND) by lead wire.
4. Turn the power ON.
5. Load a disc (YEDS-18) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focus
search)
6. Cofirmthat theoscilloscope waveform(S-curve)is symmetrical
between A and B. And confirm peak to peak level within
4 ± 1 Vp-p.
S-curve waveform
7. After check, remove the lead wire connected in step 2 and 3.
Note: • Try to measure several times to make sure than the ratio ofA : B
or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the brightness
to obtain best waveform.
RF Level Check
Procedure:
1. Connect oscilloscope to TP (RF).
2. Connect between TP (AGCCON) and TP (GND) by lead wire.
3. Turn the power ON.
4. Load a disc (YEDS-18) and press the ^button to play.
5. Confirm that the oscilloscope waveform is clear and check RF
signal level is correct or not.
6. After check, remove the lead wire connected in step 2.
Note: Clear RF signal waveform means that the shape “≈” can be clearly
distinguished at the center of the waveform.
CD SECTION
+
–
BD board
TP (FE)
TP (VC)
oscilloscope
A
B
symmetry
within 4
±
1 Vp-p
+
–
BD board
TP (RF)
TP (VC)
oscilloscope
VOLT/DIV: 200 m
V
TIME/DIV: 500 ns
level:
1.45
±
0.3 Vp-p
E-F Balance (1Track Jump) Check
Procedure :
1. Connect oscilloscpe to TP (TE) and TP (VC).
2. Turn the power ON.
3. Load a disc (YEDS-18) and playback the number five track.
4. Press the ^(CD) button. (Becomes the 1 track jump mode)
5. Confirm that the level B andA (DC voltage) on the oscilloscope
waveform.
1 track jump waveform
Specified level: ×100 = less than ± 22%
6. After check, remove the lead wire connected in step 1.
Checking Location:
BD BOARD (Side B)
A
B
+
–
BD board
TP (TE)
TP (VC)
oscilloscope
A (DC voltage
)
center of
waveform
B
0V
level = 1.3
±
0.6 Vp-p symmetry
TP (AGCCON)
TP (RF) TP (GND)
TP (FE)
IC103
IC102
IC101
TP (FE1)
TP (VC)
TP (TE)
VIDEO SECTION
Frequency Adjustment
Connection:
Procedure:
1. Connect the frequency counter to check point of the VIDEO
board.
2. Turned power switch on.
3. Press the FUNCTION button to select the CD.
4. Adjust CT503 ontheVIDEOboard so thatthe frequency counter
reading 27.0 MHz ± 80 Hz at stop status.
Adjustment Location:
VIDEO Board (SIDE B)
+
–
(27 MHz)
VIDEO board frequency counter
IC505
CN501
CN502
SL501
SL503
100
81
1
30
31
50 51 80
SL502
D502
Check point
(27 MHz)
(GND)
CT503
VIDEO
Frequency
Adjustment
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TEL 13942296513 QQ 376315150 892498299
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HCD-VX550
1818
SECTION 7
DIAGRAMS
7-1. BLOCK DIAGRAM
CD SERVO SECTION
CD MECHANISM CONTROLLER
IC505 (1/2)
A/D
CONVERTER
5
4
7
2
1
5
10
6
6
7
8
16
14
13
10
11
22
4
3
27
23
26
5
6
2
3
15
16
17
18
A
E
B
C
D
A
A+5V
D+5V
F
DETECTOR
A
B
C
D
RF
SUMMING
AMP
FOCUS
ERROR AMP
RF EQ
AMP
TRACKING
ERROR AMP
RFO
FE
RF AMP,
FOCUS/TRACKING ERROR AMP
IC103
TE
E
FF I-V AMP
E I-V AMP
LD. DRIVER
Q101
OPTICAL
TRANSCEIVER
IC381
CD DIGITAL OUT
OPTICAL
APC LD
AMP APC PD
AMP
LD
LD
PD
LASER DIODE
RFAC
ASYO
ASYI
LPH
FILTER
FILO
PCO
CLTV
FILI
DIGITAL PLL
ASYMMETRY
CORRECTOR EFM
DEMODULATOR
DIGITAL SIGNAL PROCESSOR
IC101 (1/2)
MDP
DIGITAL
CLV
PROCESSOR
32K
RAM
ERROR
CORRECTOR
INTERNAL BUS
SQCK
SQSO
MUTE
EXCK
PCMD ADATA
BCLK
LRCK
C2PO
C4M
XTSL
XTAO
XTAI
BCK
LRCK
WDCK
C2PO
CTL1
LPH
MD2
DOUT
DIGITAL
OUT
D/A
DIGITAL
INTERFACE
CLOCK
GENERATOR
SUBCODE
PROCESSOR
SCOR
WFCK
XUGF
GFS
EMPH
SENSE
DATA
CLOK
XLAT
SBSO
SENSE CLK
SENSE
DSP CLK
DSP DATA
DSP LATCH
SE
TE
FE
RFDC
FOCUS/
TRACKING/SLED
SERVO DSP
FOCUS/TRACKING/SLED
PWM GENERATOR
SFDR
OPIN3(–)
OPIN4(+)
OPIN4(–)
VO3(+)
VO3(–)
VO4(+)
VO4(–)
VO2(+)
VO2(–)
VO1(+)
VO1(–)
OPIN2(+)
OPIN2(–)
OPIN1(+)
OPIN1(–)
209 STBY2STBY1
SRDR
TFDR
TRDR
FFDR
FRDR
SSTP
COUT
S101
(LIMIT)
A+5V
MIRR,
DFCT, FOK
DETECTOR
SERVO AUTO
SEQUENCER
SERVO
INTERFACE
CPU INTERFACE
SCLK
TO CPU INTERFACE
FOK
MIRR
DFCT
M101
(SPINDLE) MOTOR
DRIVE
XRST
LDON
DSP MUTE
MOTOR
DRIVE
COIL
DRIVE
COIL
DRIVE
M
M
M102
(SLED)
16
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC102
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
DIGITAL SERVO
PROCESSOR
IC101 (2/2)
OPTICAL PICK-UP
(KSS-213D/Q-NP)
LDON
21
HOLD SW
PD
(Page 19)
•SIGNAL PATH
: CD PLAY
: DIGITAL OUT
I-V AMP
12
11
13
14
CTRL1
CTRL2
CTL1
LPH
SUBQ DATA
SUBQ CLK
SCOR
MCLK
33.8MHz
B
(Page 19)
DATA, BCK,
LRCK, C2PO
C
(Page 19)
IC104
TBL-L
TBL-R
M
DISC TRAY TURN MOTOR DRIVE
IC701
OUT1
OUT2
IN1
IN2 M701
(DISC TRAY TURN)
SYSTEM CONTROLLER
IC501 (1/4)
LEVEL SHIFT
Q701
DISC IN DETECT
SENSOR
IC703
DISC TRAY
SENSOR
IC702 ROTARY
ENCODER
S811
DISC-SENS
OUT-OPEN
S801
(OPEN/CLOSE DET)
ENC1
ENC2
ENC3
T-SENS
CLOSE
OPEN
LOAD-OUT
LOAD-IN
M
MOTOR
DRIVE
MOTOR
DRIVE
DISC TRAY SLIDE MOTOR DRIVE
IC801
OUT1
OUT2
FIN
RIN M801
(DISC TRAY SLIDE)
RESET
DEVICE RESET
XRESET
33
31
32
29
30
34
19
8
40 41 39 43
22
20
21
26
TO SERVO AUTO
SEQUENCER
50
53 55
XPCK
12
52 54
49
48
25 76 77
66
71
16 69
72
67
65
17
64
63
2
14
79 801574 6 5 10 11 13 68 3
XRST
3 5 4 1 18 36 37 10
28 2
12
77
19
11
60 61 71 70 69 68 59
423
65 63 67
10
2
3
6
7
4
7
2
66
DISC TRAY
ADDRESS DETECT
+
+
T+
T–
F+
F–
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HCD-VX550
1919
AUDIO/VIDEO CD SECTION
PROGRAM ROM
IC508
16
• SIGNAL PATH
: CD PLAY (AUDIO)
: CD PLAY (VIDEO)
D/A
CONVERTER
INPUT
INTERFACE
CIRCUIT
OSC
BUFFER
IC510
LOW-PASS
FILER
IC515
LOW-PASS
FILER
MODE
CONTROL
TIMING CONTROL/
CLOCK GENERATOR
VIDEO FREQUENCY
(27MHz)
DIGITAL FILTER,
D/A CONVERTER
IC509
MPEG VIDEO/AUDIO DECODER,
VIDEO SIGNAL PROCESSOR
IC506
CD MECHANISM CONTROLLER
IC505 (2/2)
14
11
VOUTL
VOUTR R-CH
10
RSTB
17
18
19
20
4
21
9 724 1
DATA
BCK
LRCK
CD-ROM
INTERFACE
CIRCUIT
MPEG
SYSTEM
DECODER MPEG
VIDEO
DECODER
VIDEO
PROCESS
CIRCUIT
CPU INTERFACE
AUDIO
INTERFACE
CIRCUIT
MPEG
AUDIO
DECODER
D-RAM/ROM INTERFACE
CD-DATA
C2PO
DATA
BCK
LRCK
DATA, BCK,
LRCK, C2PO CD-BCK
CD-LRCK
CD-C2PO
MA0 – MA10
VDATA0 – 7
VD0 – VD7 YUV0 – 7
MD0 – MD15
D0 – D15
D0 – D15
A0 – A18
A0 – A10
A11
384FSO
768FSO
MCKO
X503
27MHz
CT503
MD
XT2
XT1
17 1516
19
82 86 85
22
20
33
31
24
13 16
161
180
184
182
128
185
167
178
169
166
177
157
158
DA-XCLK
SYS CLK
VCK-IN
DA-DATA
DA-BCK
DA-LRCK
ML
8
MC
LEVEL
SHIFT
IC501
B
(Page 18)
DATA, CLK
D
(Page 22)
MCLK 33.8MHz
A
(Page 18) CD-L
E
(Page 21)
C
(Page 18)
C
Y
DIGITAL
FILTER,
NOISE
SHAPER
CIRCUIT
21 – 24, 27 – 32,20
A0 – A10
12 – 5, 27, 26, 23
A11–A17
A11 – A17
25, 4, 28, 29, 3, 2, 30
D0 – D7
O0 – O7
A0 – A10
DQ0 – DQ15
ADDRESS BUS
DATA BUS
D-RAM
IC507
A0 – A10 BA 13 – 15, 17 – 21
2,3,5,6,8,9,11,12,39,
40,42,43,45,46,48,49
54,58,60,64,68,72,74,78,
76,73,70,66,62,59,56,53
142,143,145,148,
150,152,154,155
WE
22
CE
RAS
CAS
18
CS
90
RESET
INT
8830 RESET
CL680 HINT
93 NT/PAL
TEST LED
CLK1
DATA1O
DATA
CLK
DF LATCH
NT/PAL OUT
29
30
I2C CLK
I2C DATA I2C/RX
I2C/TX
SD-RAS
SD-CAS
SD-CSO
MWE
MCE
RESET
1
2
3
4
J301
S VIDEO OUT
J302
VIDEO OUT
XOUT
XIN
X501
10MHz
NTSC
AUTO
PAL
S501
SYSTEM SELECT
D502
(SELF DIAGNOSIS)
73
1315
VSYNC
HSYNC
VSYNC
HSYNC
DATA
PCL
37
45
39
22
28
27
51
COUT
YOUT
VOUT
D/A
OSD
TIMING
CONTROL
Y/C
FILTER
317
18
16
4
20
19
1D/A
CLK
ROSD
GOSD
BOSD
V-B
V-G
V-R
21
64 157
NTB
27MHz
HSY
VSY
VCLK
2
8
–
,
10
DIGITAL RGB ENCORDER
IC514
D/A CONVERTER
IC511
104,110,112,111,108,105,102,99,96,
100,98,114,116,118,120,121,122,124
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3
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3
7
6
3
1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
HCD-VX550
2020
TAPE DECK SECTION
PB EQ AMP
(DECK A)
IC611
PB LEVEL (L)
(DECK A)
REC-L
PB-L
CAPSTAN MOTOR
CONTROL SWITCH
Q1001
CAPSTAN
MOTOR DRIVE
Q336 – 343
1
F
(Page 21)
(Page 21)
L-CH
R-CH R-CH
HP101
(PLAYBACK)
PB EQ AMP
(DECK B)
IC601
L-CH
R-CH R-CH
16
R-CH
R-CH
HRPE101 (1/2)
(RECORD/PLAYBACK)
ALC REC
EQ AMP
AMS
CIRCUIT
DOLBY NR
AMP
CIRCUIT
BIAS
CONTROL
CIRCUIT
DOLBY PASS
R-CH
L.P.F.
BUFFER
Q335
M
M1
(CAPSTAN)
HRPE101 (2/2)
(ERASE)
BIAS OSC
T621
B+
(A+7V)
R-CH
3
46
28 43
36
40
35 34 39
26
77
19 15 16 18 20 22 23 24 2517
85 84 83 82 81 80 79 78
31
33
32
+
48
4
2
RV311
PB LEVEL (L)
(DECK B)
RV301
TAPE SPEED
(NORMAL)
RV1002
TAPE SPEED
(HIGH)
RV1001
REC LEVEL (L)
(DECK B)
RV301
REC BIAS (R)
(DECK B)
RV441
REC BIAS (L)
(DECK B)
BIAS OSC
Q621, 622
REC BIAS
SWITCH
Q623
ROTATION
DETECT SENSOR
(DECK A)
IC1001
RV341
BIAS
TRAP
C331, L331
REC/PB SWITCHING
IC602
SYSTEM CONTROLLER
IC501 (2/4)
DECK PROCESS
DECK A/B SELECT, PB/REC EQ AMP,
DOLBY NR AMP, ALC, AMS
IC301
AIN (L)
BIN (L)
MAOUT
PB OUT (L)
EQ OUT
(L)
MSIN
MSOUT
BIAS ON/OFF
70
120
BIAS (N)
BIAS (C)
BIAS (M)
S1004
A 120/70
B NORM/CROM
ALC ON/OFF
PB A/B
NORM/HIGH
NR ON/OFF
RM ON/OFF
REC/PB/PASS
LM ON/OFF
(DECK A 120/70)
88
S1003
(DECK A HALF)
S1001
(DECK A PLAY) S1002
(DECK B PLAY)
S1008
(DECK B 120/70)
27
REC OUT (L)
ROUT (L)
RIN (L)
ALC (L)
EQ IN (L)
ALC
IN (L)
44 38
100
AMS-IN
91
A-SHUT
ROTATION
DETECT SENSOR
(DECK B)
IC1002
90
B-SHUT
TRIGGER
PLUNGER DRIVE
(DECK A)
Q333, 334
73
A-TRG
TC-MUTE
R/P-PASS
NR-ON/OFF
REC-MUTE
BIAS
EQ-H/N
PB-A/B
ALC-ON/OFF
TC-RELAY
A-PLAY-SW
B-PLAY-SW
A-HALF
89
S1006
(DECK B HALF)
S1009
(DECK B REC)
S1005
(DECK A REC)
B-HALF
TRIGGER PLUNGER
DECK A
TRIGGER
PLUNGER DRIVE
(DECK B)
Q331, 332
72
B-TRG
76
74
75
CAP-M-H/L
CAPM-CNT2
CAPM-CNT1
TRIGGER PLUNGER
DECK B
87 86
G
• SIGNAL PATH
: PLAYBACK (DECK A)
: PLAYBACK (DECK B)
: RECORD
D+5V
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3
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3
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6
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1
5
1
5
0
9
9
2
8
9
4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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