Sony HCDEX-200 Service manual
HCD-EX200
SERVICE MANUAL
Ver 1.0 2001.09
HCD-EX200 is the amplifier, CD
and tuner section in CMT-EX200.
Model Name Using Similar Mechanism HCD-EX100
Mechanism Type CDM-60B
Base Unit Type KSM-770ACA/Z-NP
Optical Pick-up Type KSS-770A/Z-N1
SPECIFICATIONS
Amplifier section
For the U.S.model
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
With 4 ohms loads,both channels driven,from
120 – 10,000 Hz;rated 12 watts per channel
minimum RMS power,with no more than 10%total
harmonic distortion from 250 milli watts to rated
output.
Canadian model:
Continuous RMS power output (Reference):
15 +15 watts
(4 ohms at 1 kHz, 10%THD)
Inputs
PC/TAPE IN: voltage 250 mV,
impedance 47 kilohms
Outputs
PC/TAPE OUT: voltage 250 mV,
impedance 1 kilohms
CD DIGITAL OUT: Optical
PHONES (stereo mini jack):
accepts headphones of
8 ohms or more
CD player section
System Compact disc and digital
audio system
Laser Semiconductor laser
(λ =780 nm)
Emission duration:
continuous
Frequency response 20 Hz – 20,000 Hz
US Model
Canadian Model
Tuner section
FM stereo,FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz
(100 kHz step)
Antenna FM wire antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range 530 – 1,710 kHz
(with the interval set at 10 kHz)
531 – 1,710 kHz
(with the interval set at 9 kHz)
Antenna AM loop antenna
External antenna terminals
Intermediate frequency 450 kHz
General
Power requirements 120 V AC,60 Hz
Power consumption 40 watts
1.8 watts (in standby mode)
Dimensions 175 x 222 x 201 mm
(w/h/d,incl.projecting parts and controls)
Mass Approx.3.2 kg
Supplied accessories Remote commander with
battery (1)
AM loop antenna (1)
FM wire antenna (1)
Speaker cords (4)
9-873-265-01
2001I0200-1
© 2001.9
MICRO HI-FI COMPONENT SYSTEM
Sony Corporation
Home Audio Company
Shinagawa Tec Service Manual Production Group
HCD-EX200
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.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth Ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microampers). Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low-voltage scale.
The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are suitable. (See Fig. A)
To Exposed Metal
Parts on Set
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE
WITH MARK ! ON 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.
0.15µF
1.5kΩ
Earth Ground
AC
voltmeter
(0.75V)
Fig. A. Using an AC voltmeter to check AC leakage.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE ! SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE
FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS
QUE PAR DES PIÈCES SONY DONT LES NUMÉROS
SONT DONNÉS DANS CE MANUEL OU DANS LES
SUPPLÉMENTS PUBLIÉS PAR SONY.
2
HCD-EX200
TABLE OF CONTENTS
1. SERVICING NOTE .......................................................... 4
2. GENERAL .......................................................................... 7
3. DISASSEMBLY
3-1. Rear Cover, Bottom Plate, Case and Eject Board ................. 9
3-2. Panel Board and Stabilizer .................................................. 10
3-3. AMP Block ......................................................................... 10
3-4. CD Block ............................................................................ 11
3-5. Motor Assy (Loading Board), CAM and SW Board .......... 11
3-6. Base Unit and Pick Up Assy ............................................... 12
3-7. Main Board (Loading Board),
REG Board and Power Board ............................................. 12
4. ELECTRICAL ADJUSTMENT ................................... 13
5. DIAGRAMS
5-1. Circuit Boards Location ...................................................... 14
5-2. Block diagrams – Tuner/CD Section – ............................... 16
Block diagrams – AMP Section – ....................................... 17
5-3. Printed Wiring Board – Main Section – .............................. 18
5-4. Schematic Diagram – Main (1/3) Section – ........................ 19
5-5. Schematic Diagram – Main (2/3) Section – ........................ 20
5-6. Schematic Diagram – Main (3/3) Section – ........................ 21
5-7. Printed Wiring Board – LED/Loading/SW/AMP Section – 22
5-8. Schematic Diagram
– LED/Loading/SW/AMP Section Section –...................... 23
5-9. Printed Wiring Board – Panel/Eject Section – .................... 24
5-10. Schematic Diagram – Panel/Eject Section – ..................... 25
5-11. Printed Wiring Board – REG Section –............................ 26
5-12. Schematic Diagram – REG Section – .............................. 27
5-13. Printed Wiring Board – Power Section – ......................... 28
5-14. Printed Wiring Board – Power Section – ......................... 29
5-15. IC Pin Functions ............................................................... 30
5-16. IC Block Diagrams ........................................................... 33
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 pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output four times.
6. EXPLODED VIEWS
6-1. Front and Case Section ....................................................... 36
6-2. Chassis Section ................................................................... 37
6-3. Mechanism Section ............................................................. 38
7. ELECTRICAL PARTS LIST ................................. 39
3
HCD-EX200
)
ADJUSTMENT OF CAM PHASE
Cam
Boss
SECTION 1
SERVICING NOTE
Absorber Absorber
Cam
SW lever
Insert the cam so that the boss touches the SW lever
at the left shown in the figure.
Note : Set the slider (1) in this location
before inserting the cam.
With the phase adjusted, attach the parts using the following procedure.
STEP1
Insert the boss of the slider (3) in the groove of
the cam.
Boss
Slider (3)
Cam
STEP3
Insert the boss of the lever (1) in the hole of the
slider (3) and attach.
Lever (1)
SW lever
Rotate the cam in the arrow direction, and adjust the
phase until the boss touches the SW lever shown in
the figure.
Boss
Boss
Lever (1)
Boss
Screw
(PTTWH2.6x8)
STEP2
Set the mecha cover to the groove
on the slider (3) and attach.
Cover, mechanical
Groove of slider (3)
4
Screw
(BVTP2.6x8)
Screw
(BVTP2.6x8)
Hole of slider (3)
STEP4
While bending the slider (2) slightly in the arrow
direction, insert it in the groove of the guides (L)
and (R) and attach.
Slider (2)
Guide (R)
Boss (Four point
Guide (L)
HCD-EX200
Shipment Mode
• Mode for setting the state of the unit to the state at shipment. When returning the unit to the customer after completing servicing, set to the
shipment mode.
Procedure :
Connect the power plug to the outlet while pressing the 1/u button.
Change-over of AM tuner Step between 9kHz and 10kHz.
• A step of AM channels can be changed over between 9kHz and 10kHz.
Procedure:
1. Press the 1/u button to turn on the set ON.
2. Select the function “TUNER”, and press the TUNER/BAND button to select the BAND “AM”.
3. Press the 1/u button to turn on the set OFF.
4. Press the 1/u button while pressing the )+/TUNING + button, and the display of liquid crystal indicator tube changes to “AM 9k
STEP” or “AM 10k STEP”, and thus the channel step is changed over.
Switching the TAPE IN input level attenuate function ON/OFF
• The attenuate function of the line input level (TAPE IN) of this unit can be turned ON/OFF.
Procedure:
1. Press the 1/u button to turn ON the power.
2. Press the FUNCTION button and set the function to “TAPE”.
3. Press the 1/u button to turn OFF the power.
4. While pressing the p button, press the 1/u button to turn ON the power.
5. After “POWER ON” is displayed, “ATT ON” and “ATT OFF” are displayed, and the attenuate function can be switched ON/OFF.
LCD All Lit and Key Check Mode
Procedure:
1. While pressing the FUNCTION button and ^ button, connect the power plug to the outlet.
2. When the test mode is set, the characters “STEP” are displayed on the LCD.
3. While pressing the DISPLAY button (See page 6), press the ^ button. The whole LCD lights up.
4. Each time the FUNCTION button is pressed, the display switches between all lit n partial lighting 1 n partial lighting 2 n all lit.
5. When the p button is pressed, “KEY 0” is displayed and the key check mode is set.
6. Each time the button is pressed, the counter counts up. Buttons once pressed will not be counted when pressed again.
When all buttons have been pressed, “KEY OK” is displayed.
7. To end, press the 1/u button to turn OFF the power, and disconnect the power plug from the outlet.
Note:
Pressing buttons other than those specified in steps 4 and 5 displays modes not used in servicing. In such cases, press the 1/u button to exit
the mode, and repeat from step 3 again.
All lit
Partial lighting 1
Partial lighting 2
5
HCD-EX200
Displaying the CD Text
• This unit is equipped with a simple CD text display function.
The text is displayed only for the first 20 songs. As it will not be displayed from the 21st song, do not suspect a fault.
In some cases, special characters may not be displayed or may be substituted by other characters. This is not a fault.
Aging Mode
• The aging mode automatically repeats the operations of the CD.
When an error occurs:
Aging stops
When no error occurs:
Aging is performed repeatedly.
Procedure:
1. Set any CD. (One with a short playback time of the final track is recommended.)
2. While pressing the FUNCTION button and the ^ button, connect the power plug to the outlet.
3. When the test mode is set, the characters “STEP” is displayed on the LCD.
4. When the ^ button is pressed while pressing the DISPLAY button, “AGING” will be displayed, and aging is performed in the
following sequence. While aging is performed, “REP” will be displayed blinking.
5. Pressing the DISPLAY button during aging displays the cycle number (@ CY where @ is the number of agings).
6. To end aging, press the 1/u button, turn OFF the power, and disconnect the power plug from the outlet.
Sequence during aging
Reads the TOC
Pauses
Accesses first track
Accesses last track
Plays last track
Eject disc (“OPEN” displayed)
Load disc (“CLOSE” displayed)
Displays number of cycles
Power OFF
Power ON
DISPLAY button
DISPLAY button
Note : Press DISPLAY button
with a thing a fine point
from the bottom of front panel.
6
SECTION 2
GENERAL
Parts Identification
The items are arranged in alphabetical order.
Main unit
HCD-EX200
This section is extracted from
instruction manual.
Display window
FUNCTION 7 (11, 17)
OPEN/CLOSE Z 1 (11)
Remote sensor 9
TUNER/BAND 6 (13)
TUNING +/– 3 (13)
VOL +/– 2
0
BUTTON DESCRIPTION
m/M 3
./> 3
x 4
NX 5
?/1 8
7
HCD-EX200
Remote Control
BASS +/– qg (15)
CD N qk (11)
CLOCK/TIMER SELECT 6
(17)
CLOCK/TIMER SET 7 (10, 16)
DISPLAY 5 (10, 13)
DSG qd (15)
ENTER 8 (10, 12, 13, 16)
FM MODE 3 (14)
FUNCTION ws (11, 17)
MEMORY 9 (13)
12
ws
wa
w;
ql
qk
qj
qh
qg
Number buttons w; (12)
OPEN/CLOSE Z 1 (11)
PC/TAPE q; (17)
PLAY MODE wa (11, 12)
REPEAT 3 (12)
SLEEP 2 (16)
SURROUND qh (15)
TREBLE +/– qf (15)
TUNER BAND qj (13)
TUNING MODE wa (13)
VOL +/– qs
34
5
6
7
8
9
0
qa
qs
qd
qf
BUTTON DESCRIPTIONS
@/1 4
+/– qa
. qa
> qa
X qk
x qk
m ql
M ql
Setting the time
1
Turn on the system.
2
Press CLOCK/TIMER SET on the
remote.
Proceed to step 4 when you set the clock for
the first time.
3
Press . or >
“CLOCK SET”, then press ENTER on
the remote.
The day indication flashes.
4
Press or repeatedly to set the
.>
day, then press ENTER on the remote.
The hour indication flashes.
5
Press or repeatedly to set the
.>
hour, then press ENTER on the remote.
The minute indication flashes.
6
Press or repeatedly to set the
.>
minute, then press ENTER on the
remote.
The clock starts working.
Tip
If you made a mistake or want to change the time,
start over from step 1.
Turning off the clock display
in standby mode
Press DISPLAY on the remote while the
system is off.
To turn on the clock display, press DISPLAY
on the remote again.
Notes
• When the Daily Timer is set, you cannot turn off the
clock display.
• The clock display will appear when you set the
Daily Timer during turning off the display.
repeatedly to select
8
Note: Disassemble the unit in the order as shown below.
r
HCD-EX200
SECTION 3
DISASSEMBLY
Set
Rear cover, Bottom plate, Case and Eject board
Panel board and Stabilizer
Amp block
CD block Motor assy, Cam and SW board Base unit and Pick up assy
Main board,REG board, Power board
Note: Follow the disassembly procedure in the numerical order given.
3-1. REAR COVER, BOTTOM PLATE, CASE AND EJECT BOARD
9
Case with cover (top) assy
Washer
qs
qa
Eject board
0
Screw (2X5)
6
5
Three screws
(+BVTT3X5)
8
Connector
(from CN602
on Panel board)
B
B
7
A
A
6
5
Three screws
(+BVTT3X5)
Rear cove
2
1
Two claws
4
Bottom plate
3
Four screws
(+BVT3X5)
9
HCD-EX200
3-2. PANEL BOARD AND STABILIZER
Stabilizer claw
Stabilizer
Turn the stabilizer claw in the direction
Stabilizer
of the arrow to remove it from the notch
on the stabiholder.
6
Panel board
2
Claw
Two screws
5
(+BVTT2.6X8)
7
Flat type wire
(CN601)
4
Remove the Earth clip
3-3. AMP BLOCK
Connector
2
AMP board: CN801
Connector
3
AMP board: CN810
3
Front panel assy
1
Two screws (+BVTT3X5)
Three screws
5
(+BVTT2.6X8)
AMP block
5
4
Connector
AMP board: CN802
10
Two screw (BVTT3x5)
1
Screw (BVTT3x5)
1
3-4. CD BLOCK
)
)
Connector
7
MAIN board: CN351
Flat type wire (CN301)
6
Connector
5
MAIN board: CN302
4
Two screws (BVTT3x5)
CD block
8
2
Screw (BVTT3x5)
1
Screw (BVTT3x5)
HCD-EX200
3-5. MOTOR ASSY (LOADING BOARD), CAM AND SW BOARD
Note: The phase adjustment is required in assembly.
Refer to"Section 1. Servicing Note" for details.
4
Two screws (M2.6)
Disc holder
6
Slider (2)
8
5
Two screws (M2.6)
Slider (3)
!£
3
Two screws (BVTT3x5
Two screws (BVTP2.6x8)
0
Lever (1)
9
Two screws (BVTP2.6x8)
!¡
Mecha cover
!™
7
Screws (PTPWH2.6
SW board
!§
1
Two screws (BVTP2.6x8)
!¢
Cam
!∞
Screws (BTP2.6x8)
2
Two screws (BVTP2.6x8)
Loading board
3
Motor assy
11
HCD-EX200
)
Warning
After repairs are completed and it has been assembled, be sure to carry out the following checks.
1. Make sure the disc opens and closes smoothly.
2. Make sure the disc does not rub on anything when it is played.
3-6. BASE UNIT AND PICK UP ASSY
1
Two screws (BVTP2.6x8)
9
Two screws
Coil spring
8
(PTPWH2.6)
2
Guide (L)
5
Slider (4)
7
0
Coil spring
Two screws (PTPWH2.6)
!¡
!™
BU holder
!£
Screws (PTPWH2.6)
!¢
6
Slider (4)
Slider (1)
Two screws (PTPWH2.6)
3
Two screws
(BVTP2.6x8)
4
Guide (R)
Pick up assy
!∞
3-7. MAIN BOARD (LED BOARD), REG BOARD AND POWER BOARD
5
4
Flat type wire (CN701)
Main board
6
7
Two screws
(BVTT3x5)
LED board
3
Flat type wire
(CN702)
Screw (PTPWH2.6)
8
Two screws
(BVTT3x5)
qh
Back panel
1
Screw (BVTT3x5)
qd
Two screws (BVTP3x8
2
Two screws
(BVTP3x8)
0
Screw (BVTT3x5)
qg
Three screws
(BVTT3x5)
9
Screw (BVTT3x5)
qa
Shield case
Power cord
ql
qj
Screw (BVTT3x5)
Power board
w;
Two screws
qk
(BVTT3x5)
12
qf
REG board
qs
Connector
POWER board: CN903
SECTION 4
TP
(VC)
TP
(FEI)
TP
(RF)
TP
(FE)
TP
(TE)
IC303
IC301
ELECTRICAL ADJUSTMENT
HCD-EX200
Note:
1. CD Block is basically constructed to operate without adjustment.
Therefore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MΩ impedance.
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
oscilloscope
MAIN board
TP (FE)
TP (VC)
+
–
Procedure :
1. Connect the oscilloscope to test points TP (FE) and TP (VC).
2. Connect TP (FEI) and TP (VC) of the MAIN board with lead
wires.
3. Press the 1/u button to turn the set ON.
4. Press the ^ button, load and eject the disc (YEDS-18) to
perform focus search.
5. Check the symmetry and peak to peak level of the oscilloscope
waveform (S curve) at this time.
S-curve waveform
symmetry
Note: Clear RF signal waveform means that the shape “◊” can be
clearly distinguished at the center of the waveform.
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.2 ± 0.2 Vp-p
Checking Location : MAIN board
E-F Balance (1 Track Jump) check
oscilloscope
MAIN board
TP (TE)
TP (VC)
+
–
Procedure:
1. Connect oscilloscope to test point TP (TE) and TP (VC) on MAIN
board.
2. Press the 1/u button to turn the unit ON.
3. Put disc (YEDS-18) in and playback No.5track.
4. Press the ^ button, to pause.
5. Check the level (B) of the oscilloscope's waveform and the DC
voltage (A) of the center of the Traverse waveform.
Confirm the following:
A
Within 3.8 ± 1 Vp-p
B
6. After check, remove the lead wire connected in step 2.
Note: • Try to measure several times to make sure than the ratio of
A : 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.
Checking Location : MAIN board
RF Level Check
oscilloscope
MAIN board
TP (RF)
TP (VC)
+
–
Procedure :
1. Connect oscilloscope to test point TP (RF) and TP (VC) on MAIN
board.
2. Press the 1/u button to turn the set ON.
3. Put disc (YEDS-18) in and playback No.5track.
4. Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.
• A/B x 100 = less then ± 22 (%)
• B = 1.3 ± Vp-p
1 track jump waveform
0V
+0.6
–0.7
level : 1.3 ± Vp-p
+0.6
–0.7
Checking Location : MAIN board
[ MAIN BOARD ] — SIDE A —
Center of the waveform
B
A (DC voitage)
Symmetry
13
HCD-EX200
D
5-1. CIRCUIT BOARDS LOCATION
EJECT BOARD
LED BOARD
SECTION 5
DIAGRAMS
MAIN BOARD
AMP BOARD
PANEL BOARD
REG BOAR
SW BOARD
POWER BOARD
LOADING BOARD
14
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