Sony HCD-CPX1 User manual

SERVICE MANUAL
CD
Section
Tape deck
Section
Amplifier section
DIN power output (rated): 55 + 55 W
(4 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
70 + 70 W
(4 ohms at 1 kHz, 10%
THD)
Inputs
MD (VIDEO) IN (phono jacks):
Sensitivity 450/250 mV,
impedance 47 kilohms
Outputs
CD DIGITAL OUT: Optical Wavelength:
660 nm
PHONES: accepts headphones with
an impedance of 8 ohms or
more
SPEAKER: accepts impedance of
4ohms
CD player section
Laser Semiconductor laser
(CD: λ=780 nm)
Emission duration:
continuous
Frequency response CD: 2 Hz – 20 kHz
Wavelength 780 – 790 nm
Tape deck section
Recording system 4-track 2-channel stereo
Frequency response 50 – 13,000 Hz (±3 dB),
using Sony TYPE I
cassettes
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz (50 kHz
step)
Antenna FM wire antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range 531 – 1,602 kHz
(with the tuning interval
set at 9 kHz)
Antenna AM loop antenna, external
antenna terminal
Intermediate frequency 450 kHz
General
Power requirements 230 V AC, 50/60 Hz
Power consumption 50 W
0.3 W (in Power Saving
mode)
Dimensions (w/h/d) Approx. 174 ×240.5 ×291
mm
Mass Approx. 4.3 kg
Design and specifications are subject to change
without notice.
COMPACT DISC DECK RECEIVER
AEP Model
UK Model
SPECIFICATIONS
HCD-CPX1
Ver 1.0 2003.02
HCD-CPX1 is the Amplifier, CD
player, Tape Deck andTuner section
in CMT-CPX1.
Model Name Using Similar Mechanism NEW
CD Mechanism Type CDM55C-K6BD44S
Base Unit Name BU-K6BD44S
Optical Block Name KSM-213DCP
Optical Pick-up Name KSS-213D
Model Name Using Similar Mechanism NEW
9-877-059-01 Sony Corporation
2003B0500-1 Home Audio Company
C2003.02 Published by Sony Engineering Corporation

2
HCD-CPX1
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
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.
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 PUB-
LISHED BY SONY.
TABLE OF CONTENTS
1. SERVICING NOTES ............................................... 3
2. GENERAL
Location of Controls ....................................................... 7
Setting the Clock ............................................................. 8
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 9
3-2. Case ................................................................................. 10
3-3. Front Panel Section ......................................................... 10
3-4. TC Board, Mechanical Deck .......................................... 11
3-5. MAIN Board ................................................................... 11
3-6. Tuner Unit ....................................................................... 12
3-7. CD Mechanism Deck (CDM55C-K6BD44S) ................ 12
3-8. Loading Board................................................................. 13
3-9. Cam (CDM55) ................................................................ 13
3-10. Base Unit (BU-K6BD44S) ............................................. 14
4. TEST MODE.............................................................. 15
5. ELECTRICAL ADJUSTMENTS
Deck Section ................................................................... 17
CD Section ...................................................................... 18
6. DIAGRAMS
6-1. Block Diagram – CD Servo Section –........................... 19
6-2. Block Diagram – TUNER/TAPE DECK Section – ...... 20
6-3. Block Diagram – MAIN Section – ................................ 21
6-4. Block Diagram
– DISPLAY/POWER SUPPLY Section – ...................... 22
6-5. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 23
6-6. Printed Wiring Board – BD Board – ............................. 24
6-7. Schematic Diagram – BD Board – ................................ 25
6-8. Printed Wiring Board – TC Board –.............................. 26
6-9. Schematic Diagram – TC Board –................................. 27
6-10. Printed Wiring Boards
– LOADING/MAIN Boards – ....................................... 29
6-11. Schematic Diagram – MAIN Board (1/2) – .................. 30
6-12. Schematic Diagram
– LOADING/MAIN (2/2) Boards – ............................... 31
6-13. Printed Wiring Board – AMP Board – .......................... 32
6-14. Schematic Diagram – AMP Board – ............................. 33
6-15. Printed Wiring Boards
– BACK LIGHT/LCD/SWITCH Boards – .................... 34
6-16. Schematic Diagram
– BACK LIGHT/LCD/SWITCH Boards – ................... 35
6-17. Printed Wiring Board
– HP/ SP OUT/POWER Boards – ................................. 36
6-18. Schematic Diagram
– HP/ SP OUT/POWER Boards – ................................ 37
6-19. IC Pin Function Description ........................................... 42
7. EXPLODED VIEWS
7-1. Case Section .................................................................... 45
7-2. Front Panel Section-1...................................................... 46
7-3. Front Panel Section-2...................................................... 47
7-4. Lid (TC) Section ............................................................. 48
7-5. Chassis Section-1 ............................................................ 49
7-6. Chassis Section-2 ............................................................ 50
7-7. Chassis Section-3 ............................................................ 51
7-8. CD Mechanism Deck Section
(CDM55C-K6BD44S) .................................................... 52
7-9. Base Unit (BU-K6BD44S) ............................................. 53
8. ELECTRICAL PARTS LIST ............................... 54
This appliance is
classified as a CLASS 1
LASER product. This
label is located on the
rear exterior.

3
HCD-CPX1
SECTION 1
SERVICING NOTES
The laser diode in the optical pick-up block may suffer electro-
static 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 emis-
sion, observe from more than 30 cm away from the objective lens.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
NOTE ON INSTALLING AND REMOVING THE TAPE MECHANICAL DECK
To prevent four screws of +BVTP 3 ×8 TYPE 2 TT (B), that fix the mechanical deck to the front panel, from being magnetized, must not
use a magnetic screwdriver.
screw +BVTP 3 × 8 TYPE 2 TT (B
)
screw +BVTP 3 × 8 TYPE 2 TT (B)
non-magnetic screwdriver

4
HCD-CPX1
TAPE MECHANICAL DECK SERVICE POSITION
Set up the service position with putting an insulator under the mechanical deck as the figure shown below.
tape mechanical deck
insulator
CD MECHANISM DECK SERVICE POSITION
Set up the service position for the CD mechanism deck with disassembling the entire set as the figure shown below.
AMP section
CD mechanism deck
main board
front pane
l

5
HCD-CPX1
NOTE ON LEADING THE WIRE (FLAT TYPE) (9 CORE)
Lead the wire (flat type) (9 core) properly to prevent the wire from coming out from the right side of the guides on the sub panel or sagging
inside of the lid.
NOTE ON INSTALLING THE HP BOARD
Note: Follow the assembly procedure in the numerical order given.
lid (TC)
guides
wire (flat type) (9 core)
sub panel
3 three screws
(BVTP2.6
× 8)
1 Lead the cable trough out
the ditch of the HP board
to prevent the cable from
contacting with the CD
mechanism deck.
2 HP board
ditch cable
HP board

6
HCD-CPX1
CLINCHING THE WIRE (FLAT TYPE) (21 CORE)
HANDLING TWO CABLES FROM THE SUB POWER AND THE SWITCHING REGULATOR TO THE MAIN BOARD
heat sink
AMP board
Clinch the wire (flat type) (21 core)
to prevent the wire from contacting with
the heat sink of the AMP board.
cable from the switching
regulator to the main board
lead pin
cable from the sub power
to the main board
fabric no woven (10 – 20)
Note: Do not reuse the current fabri
c
because it may fall off.
Note: Fix two cables with the lead pin and the fabric non woven (10 – 20),
or they may sag and contact with the CD mechanism deck.

7
HCD-CPX1
SECTION 2
GENERAL
•LOCATION OF CONTROLS
– FrontView –
This section is extracted from
instruction manual.
BASS +/– wa
CD SYNCHRO qa
Disc tray ql
DISPLAY wf
Display window 3
DSG ws
FM MODE qs
FUNCTION 0
PHONES jack qk
PLAY MODE/DIRECTION wd
Remote sensor 2
REPEAT qs
TREBLE +/– w;
TUNER/BAND 9
TUNING MODE wd
TUNING +/– qd
VOLUME +/– qf
?/1 (power) 1
TAPE Z(eject) 4
TAPE nN (play) 5
TAPE x(stop) 6
TAPE X(pause) 7
TAPE zREC (record) 8
lm/ML (rewind/fast
forward, go back/go forward)
qd
CD NX (play pause) qg
CD x(stop) qh
CD Z(eject) qj
ALPHABETICAL ORDER
A – Q R – Z
BUTTON DESCRIPTIONS
1
qa
qs
0
5
6
7
8
9
qg
qd
qh
qj
234
qf
w;
ql
qk
wa
ws
wd
wf

8
HCD-CPX1
– Remote Control –
CD ws
CLEAR w;
CLOCK/TIMER SELECT 2
CLOCK/TIMER SET 3
DISPLAY 6
ENTER qd
EQ qh
EQ + qg
EQ – ql
FUNCTION wg
PLAY MODE wa
REPEAT qs
SLEEP 1
TAPE wf
TUNER/BAND wd
TUNER MEMORY 5
TUNING MODE wa
TUNING +/– 9
VOL +/– qk
?/1 (power) 4
TAPE nN (play) 7
TAPE x(stop) 8
CD NX (play pause) 0
CD x(stop) qa
./> (go back/go forward)
qf
m/M (rewind/fast forward)
qj
ALPHABETICAL ORDER
A – E F – Z
BUTTON DESCRIPTIONS
2 3
6
8
5
w;
wa
qk
14
7
9
qa
0
ws
wd
wf
wg
ql
qd
qg
qs
qf
qh
qj
1Press ?/1 to turn on the system.
2Press CLOCK/TIMER SET.
3Press .or >repeatedly to set the
hour.
4Press ENTER.
5Press .or >repeatedly to set the
minute.
6Press ENTER.
The clock starts working.
To adjust the clock
1Press CLOCK/TIMER SET.
2Press .or >until “CLOCK” appears,
then press ENTER.
3Do the same procedures as step 3 to 6
above.
Note
The clock is not displayed in Power Saving Mode.
Setting the clock

HCD-CPX1
9
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY
Set
3-4. TC BOARD,
MECHANICAL DECK
(Page 11)
3-3. FRONT PANEL SECTION
(Page 10)
3-2. CASE
(Page 10)
3-7. CD MECHANISM DECK
(CDM55C-K6BD44S)
(Page 12)
3-6. TUNER UNIT
(Page 12)
3-8. LOADING BOARD
(Page 13)
3-9. CAM (CDM55)
(Page 13)
3-10. BASE UNIT
(BU-K6BD44S)
(Page 14)
3-5. MAIN BOARD
(Page 11)

HCD-CPX1
10
3-3. FRONT PANEL SECTION
Note: Follow the disassembly procedure in the numerical order given.
3-2. CASE
1 two case screws
3
3
4 case
2 three screws
(BVTP3
× 6)
1 two case screws
1 screw
(BVTP3
× 6)
2 ground wire lead
6 front panel section
5 four screws
(BVTP3
× 6)
4 connector
(CN102)
3 wire (flat type) (19 core)
(CN402)
3 wire (flat type) (9 core
)
(CN403)
3 wire (flat type) (19 core)
(CN221)

HCD-CPX1
11
1 screw
(BVTP3
× 6)
2 screw
(BVTP3
× 8)
1 two screws (BVTP3 × 6)
1 three screws (BVTP3 × 6
)
2 screw (BVTP3 × 8)
8 main board
4 two screws (BVTP3 × 6)
5
6 wire (flat type)
(15 core)
(CN211)
6 wire (flat type)
(21 core)
(CN202)
7 connector
(CN201)
6 wire (flat type) (21 core)
(CN101)
7 two connectors
(CN301, CN401)
3 back panel
3-4. TC BOARD, MECHANICAL DECK
3-5. MAIN BOARD
2 wire (flat type) (8 core)
(CN602)
1 wire (flat type) (19 core)
(CN603)
4 three screw
s
(PTPWH 2)
5 TC board
3 connector
8 mechanical deck
6 four screws
(BVTP3
× 8)
Note: Must not use a magnetic
screwdriver to prevent the screws
from being magnetized.
7 ground wire lead

HCD-CPX1
12
3-6. TUNER UNIT
3-7. CD MECHANISM DECK (CDM55C-K6BD44S)
2 two screws
(BVTP3
× 6)
3 bracket
5 two screws
(BVTP3
× 6)
1 connector
(CN990)
2 two screws
(BVTP3
× 6)
6 tuner unit
4 wire (flat type) (15 core
)
3 screw
4 two bosses
8 wire (flat type) (21 core
)
(CN1101)
7
5
6 two claws
9 CD mechanism deck
(CDM55C-K6BD44S)
2 CD lid
1 two claws

HCD-CPX1
13
3-8. LOADING BOARD
3-9. CAM (CDM55)
2 belt (CDM55)
B
3 Pull the tray (CDM55D) pushing B .
4 two screws
(BTP2.6
× 8)
5 loading board
1 Rotate the gear(A) in
the direction of arrow
A .
A
2 lever (SW)
1 torsion spring
6 gear (A)
3 spacer (55)
4 pulley (LDG)
5 gear (B)
7 roller
8 cam (CDM55
)

HCD-CPX1
14
3-10. BASE UNIT (BU-K6BD44S)
1 two floating screws
(PTPWHM2.6)
5 two insulators
4
5 two insulators
6 base unit
(BU-K6BD44S)
3 two stoppers (BU)
2 two screws
(BTTP M2.6)

15
HCD-CPX1
[CMN (MC)TEST MODE]
•This mode is used to check operations of Amplifier.
Procedure:
1. Press the ?/1key to turn the power ON.
2. Press three keys of [DSG], [REPEAT] and [DISPLAY]
simultaneously.
3. When the CMN (MC) test mode is activated, “s” blinks on
the liquid crystal display.
4. Turn the [BASS] knob counterclockwise, “TONE MIN” is
displayed on the liquid crystal display. Turn the [BASS] knob
clockwise, “TONE MAX” is displayed on the liquid crystal
display.
Turn the [TREBLE] knob clockwise or counterclockwise,
“TONEFLAT” is displayed on the liquid crystal display.
Turn the [VOLUME] knob counterclockwise, “VOL MIN” is
displayed on the liquid crystal display. Turn the [VOLUME]
knob clockwise, “VOL MAX” is displayed on the liquid crystal
display.
5. To release this mode, press the ?/1key.
[PANEL (GC)TEST MODE]
•This mode is used to check the liquid crystal display, LED,
model, destination, software version and key.
Procedure:
1. Press the ?/1key to turn the power ON.
2. Press threekeys of [DSG], [PLAY MODE] and [DISPLAY]
simultaneously.
3. Liquid crystal display and LEDs are all turned on.
4. When you want to enter the model, destination and version
display mode, press the [REPEAT] key. The model and
destinationare displayed alternately ontheliquid crystal display.
5. Eachtime[REPEAT] key ispressed, the displaychanges starting
from MD version, MC version, GC version, CD version, CDD
version, CDMA version, CDMB version, BDA version, BDB
version, ST version, TA version, TM version, and TC version
this order, and returns to the MD version display on the liquid
crystal display.
6. When [FUNCTION] key is pressed while the version numbers
are being displayed except model and destination, year, month
and day of the software creation display. When [FUNCTION]
key is pressed again, the display returns to the software version
display.When [REPEAT] key is pressed while year,month and
dayofthe software creationare being displayed, theyear, month
and day of creation of the software versions are displayed on
the liquid crystal display in the same order of version display.
7. Press the [PLAY MODE] key, the key check mode is activated.
8. In the key check mode, the liquid crystal display displays “K0”
on the liquid crystal display. Each time a key is pressed, “K”
value increases. However, once a key is pressed, it is no longer
taken into account.
9. To release this mode, press three keys in the same manner as
step 2, or disconnect the power cord.
[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. Press the ?/1key to turn the power ON.
2. Pressthreekeys of ?/1,x(CD)and x(TAPE)simultaneously.
3. The liquid crystal display becomes blank instantaneously, and
the set is reset.
[SHIP MODE (NO MEMORY CLEAR) ]
•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 ?/1key to turn the power ON.
2. Press the [FUNCTION] key to select “CD”.
3. Press three keys of Z(CD), x(CD) and [DISPLAY]
simultaneously.
4. After the “STANDBY” display blinks, “LOCK” is displayed
on the liquid crystal display, and the ship mode is set.
[SHIP MODE (MEMORY CLEAR) ]
•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 ?/1key to turn the power ON.
2. Press the [FUNCTION] key to select “CD”.
3. Press three keys of Z(CD), CD NX and [DISPLAY]
simultaneously.
4. After the “STANDBY” display blinks, “LOCK” is displayed
on the liquid crystal display, and the ship mode is set.
[CDTRAY LOCK MODE]
•This mode is used to unable to take sample disc out of tray in
the shop.
Procedure:
1. Press the ?/1key to turn the power ON.
2. Press the [FUNCTION] key to select “CD”.
3. While pressing the Z(CD) key, press the x(CD) key for 5
seconds.
4. The message “LOCKED” is displayed on the liquid crystal
display and the tray is locked. (Even if pressing the Z(CD)
key, the message “LOCKED” is displayed on the liquid crystal
display and the tray is locked)
5. To release from this mode, pressing the Z(CD) key, press the
x(CD) key for 5 seconds.
6. The message “UNLOCKED” is displayed on the liquid crystal
display and the tray is unlocked.
[CD SERVICE MODE]
•This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the optical pick-up.
Procedure:
1. Press ?/1key to turn the power ON.
2. Press the [FUNCTION] key to select “CD”.
3. Press three keys of [DSG] , [REPEAT] and x(TAPE) simul-
taneously.
4. Press MLkeyto movethe opticalpick-up to outsidetrack,
or press lmkey to inside track.
5. To release this mode, press the ?/1key.
SECTION 4
TEST MODE

16
HCD-CPX1
[AGING MODE]
•This mode can be used for operation check of CD section and
tape deck section.
CD section and tape deck section work in parallel.
If an error occurred:
The aging operation stops only an error occurred sections and
display then status.
If no error occurs:
The aging operation continues repeatedly.
Procedure:
1. Press the ?/1key to turn the power ON.
2. Press the [FUNCTION] key to select “CD”.
3. Set disc on the tray and set tape into the deck.
4. Press the [REPEAT] key to “REPEAT” off.
5. Press three keys of [DSG], [PLAY MODE] and x(TAPE)
simultaneously.
6. Aging operations of CD and tape are started at the same time.
7. To release this mode, press the ?/1key.
1. Display at the Aging Mode
Display operating state of CD section and tape deck section
alternately.
If an error occurred, stop display which that section.
2. CD Section
The sequence during the aging mode is following as below.
Display at the aging mode is the same as the normal operation.
Aging mode sequence (CD section) :
Start
Disc chucking
TOC read
Play first track for 2 seconds
Play last track for 2 seconds
Open the disc tray
Close the disc tray
3. Tape Deck Section
The sequence during the aging mode is following as below.
If an error occurred, stop display that step.
Display at the aging mode is “TAPE AG—”.
Aging mode sequence (Tape deck section) :
Start
Rewind the tape
Shut off
FWD play the tape
2 minutes
Fast forward the tape
Shut off or 20 seconds
REV play the tape
2 minutes
[CD ERROR CODE MODE]
•This mode can be used for error display of CD section.
Procedure:
1. Press the ?/1key to turn the power ON.
2. Press the [FUNCTION] key to select “CD”.
3. Press three keys of [DSG], [REPEAT] and Xsimultaneously.
Note: Error code is not displayed on the liquid crystal display.
[CD SERVOTEST MODE]
•This mode used to ckeck operation of optical pick-up.
Procedure:
1. Press the ?/1key to turn the power ON.
2. Press the [FUNCTION] key to select “CD”.
3. Pressthree keysof[DSG],[PLAY MODE] and Xsimultaneously.
4. WhentheCD servotest mode isactivated,opticalpick-up moves.
[5 REPEAT OFF MODE]
•Number of repeat for CD playback is 5 times when the repeat
mode is “REPEAT”. This mode is used to enables CD to repeat
playback for limitless times.
Procedure:
1. Press the ?/1key to turn the power on.
2. Press the [FUNCTION] key to select “CD”.
3. Press three keys of [DSG], MLand x(TAPE)
simultaneously.
4. When the 5 repeat off mode is activated, “LIMIT OF” is
displayed on the liquid crystal display.
[CHANGE-OVER FUNCTION OF EXTERNAL INPUT]
•This mode is used to enable function of external input to change
over between MD and VIDEO.
Procedure:
1. Set to standby state.
2. Press two keys of ?/1and [FUNCTION] simultaneously.
3. The function of external input changes over to MD orVIDEO.

17
HCD-CPX1
Note: Confirm each contents of this section first of all. If the results are
not satisfied, do the adjustment.
1. The adjustments should be performed with the rated power supply
voltage unless otherwise noted.
2. The adjustments should be performed in the order given in this service
manual.
3. The adjustments should be performed for both L-CH and R-CH.
REC BIAS ADJUSTMENT
Procedure:
1. Press the [FUNCTION] key to select “MD” or “VIDEO”.
2. Set the tape into the deck.
3. After pressing zREC key, press X(TAPE) key to start
recording.
4. Mode: Record
5. Mode: Playback
6. Confirm the playback signal recorded in step 3 becomes
adjustable level as follows.
If these levels are out of specified values, adjust the RV653 (L-
CH) and RV603 (R-CH) on the TC board to repeat steps 4 and
5.
Specified values: Playback output of 315 Hz to playback
output of 10 kHz: ±2.0 dB
Adjustment Location: TC board
attenuator
set
MAIN board
MD (VIDEO) IN jack (J101)
L-CH, R-CH
1) 315 Hz
2) 10 kHz 34.6 mV (– 27 dB)



600 Ω
blank tape
CN-123
AF OSC
+
–
set
recorded
portion
SP OUT board
SPEAKER terminals (J701)
L-CH, R-CH
level meter
0 dB=0.775 V
DECK SECTION REC LEVEL ADJUSTMENT
Procedure:
1. Press the [FUNCTION] key to select “MD” or “VIDEO”.
2. Set the tape into the deck.
3. After pressing zREC key, press X(TAPE) key to start
recording.
4. Mode: Record
5. Mode: Playback
6. Confirm the play back signal recorded in step 3 becomes
adjustable level as follows.
If these levels are out of specified values, adjust the RV652 (L-
CH) and RV602 (R-CH) on the TC board to repeat steps 4 and
5.
Specified values: Playback level 30.8 to 38.8 mV (–28 to –26 dB)
Adjustment Location: TC board
set
MAIN board
MD (VIDEO) IN (J101)
315 Hz, 34.6 mV (–27 dB) blank tape
CS-123
600
Ω
attenuator
AF OSC
+
–
set
recorded
portion
SP OUT board
SPEAKER terminals (J701)
L-CH, R-CH
level meter
SECTION 5
ELECTRICAL ADJUSTMENTS
(R-CH)
(L-CH)
RV603
(R-CH)
RV602
(L-CH)
RV652
RV653





– TC BOARD (Component Side) –
REC Level Adjustment
REC Bias
Adjustment

18
HCD-CPX1
CD SECTION
Note:
1. CD Block is basically constructed to operate without
adjustment.
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.
5. Check the focus bias check when optical pick -up block is
replaced.
FOCUS BIAS CHECK
Procedure :
1. Connect oscilloscope to TP (RFAC) and TP (VC) on the BD
board.
2. Press the ?/1button to turn the power ON, and press the Z
(CD) button to open the CD disc tray.
3. Set disc (YEDS-18) on the tray and press the CDNX button
to playback.
4. Confirm that oscilloscope waveform is as shown in the figure
below. (eye pattern)
A good eye pattern means that the diamond shape ( ) in the
center of the waveform can be clearly distinguished.
s
Checking Location:
+
–
BD board
TP (RFAC)
TP (VC)
oscilloscope
(DC range)
VOLT/DIV: 200 m
V
TIME/DIV: 500 ns
level:
0.9
± 0.4 Vp-p
TP
(RFAC)
TP
(VC)
– BD BOARD (Conductor Side) –
IC103
IC102
IC101

HCD-CPX1
1919
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM – CD SERVO Section –
SQSO SQCK
A/D
CONVERTER
6
7
8
9
16
18
11
10
12
2
1
51
49
48
43
24
41
40 39
64 15
28
29
30
31
32
33
23
24
22
6
7
4
5
17
18
16
15
A+3.3V
DETECTOR
A
B
C
D
RFAC
SUMMING
AMP
FOCUS
ERROR AMP
TRACKING
ERROR AMP
RFAC
FE
RF AMP,
FOCUS/TRACKING ERROR AMP
IC103
TE
E
FF I-V AMP
E I-V AMP
AUTOMATIC
POWER
CONTROL
Q101
APC LD
AMP
LD
LD
PD
LASER DIODE
RFAC
ASYO
ASYI
ASYMMETRY
CORRECTION
DIGITAL
PLL
DIGITAL SIGNAL PROCESSOR,
DIGITAL FILTER, D/A CONVERTER
IC101 (1/2)
DATA
XLAT
CLOK
1456
MDP
26 7 8
XLON
3
XRST
DIGITAL
CLV
D/A
INTERFACE
SE
TE
FE
RFDC
FOCUS/TRACKING/SLED
SERVO DSP
FOCUS/TRACKING/SLED
PWM GENERATOR
SFDR
20
MUTE
SRDR
TFDR
TRDR
FFDR
FRDR
EMPH
WFCK GFS
MIRR/DFCT/
FOK
DETECTOR
SERVO AUTO
SEQUENCER
SERVO
INTERFACE
CPU INTERFACE
18
63
62
61
19
SENS
20
36
37
35
56 19
SCOR
CD SQSO
CD SQCLK
CD XLT
CD CLK
CD DATA
CD SENS
CD SCOR
1 2
32 33
SCLK
COUT
921
SSTP
27
FOK
22
23
MIRR
DFCT
TO SERVO INTERFACE
M101
(SPINDLE)
MOTOR
DRIVE
MOTOR
DRIVE
M
M
M102
(SLED)
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC102
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
DIGITAL SERVO
PROCESSOR
IC101 (2/2)
OPTICAL PICK-UP
BLOCK
(KSM-213DCP)
SW
PD
11
12
13
14
54 56 53 55
FILTER
FILO
PCO
CLTV
FILI
EFM
DEMODULATOR
SERIAL
IN
INTERFACE
DIGITAL
FILTER,
NOISE SHAPER
PWM
&
INTEGRATOR
BUFFER
CLOCK
GENERATOR
TIMING
LOGIC
DIGITAL
OUT
INTERNAL BUS
16K
RAM
ERROR
CORRECTOR
SUBCODE
PROCESSOR
60
60 CD XRST
AIN1
AIN2
AOUT1
AOUT2
TO MIRR/DFCT/
FOK DETECTOR
PCMD
BCK
LRCK
C2PO
DOUT
70
77
LOUT1
LOUT2 R-CH
72
75
71
76
A
(Page 21)
EQ
IN 15
3
4EQ
AC
SUM
17
FEI
RFDC
AMP 28
RFDCO
29
RFDCI
19
TE BAL
COIL
DRIVE
COIL
DRIVE
24
26
28
CD PWM3
CD PWM2
CD PWM1
PWM1
PWM3
PWM2
PWM3
PWM2
PWM1
XLAT
CLOK
DATA
54 CD LD-ON
78CD MUTE
CDM IN-SW 70
CDM OUT-SW 69
IN
OUT
S1
LOADING IN/OUT
DETECT
CDM LOAD-IN 68
CDM LOAD-OUT 67 9
7RIN
FIN MOTOR
DRIVE 4
2
OUT1
OUT2
LOADING MOTOR
DRIVER
IC201
M201
(LOADING)
M
SYSTEM CONTROLLER
(CD MECHANISM CONTROL)
IC401 (1/4)
• SIGNAL PATH
: CD PLAY (ANALOG)
: CD PLAY (DIGITAL OUT)
• R-ch is omitted due to same as L-ch.
OPTICAL
TRANSCEIVER
IC202
CD DIGITAL OUT
OPTICAL
CD
L-CH
RFAC
VCA
When the optical
pick-up is inner
position
ON :
MUTING
Q201
MUTING CONTROL
SWITCH
Q203, 204
R-CH
67 66
XTAO XTAI
X101
16.9344MHz
A+3.3V
S101
(LIMIT)
D+3.3V

HCD-CPX1
2020
6-2. BLOCK DIAGRAM – TUNER/TAPE DECK Section –
REC BIAS
(R)
RV603
REC BIAS
(L)
RV653
R-CH
8
7 9
4
FM 75Ω
COAXIAL
FM ANT
ANT GND
AM ANT
ANT GND ST DIN
ST CLK
ST CE
ST MUTE
TUNED
STEREO
L-CH
R-CH
ST DOUT
TUNER UNIT
AM
R-CH
25
ST DATA IN
23
ST DATA OUT
27
ST CLK
22
ST CE
21
ST MUTE
DI
DO
CLK
CE
MUTING
57
ST TUNED
34
ST STEREO
TUNED
STEREO
L-CH
R-CH
ERASE
R-CH
HRPE901
(REC/PB/ERASE)
REC/PB SWITCHING
IC602
R-CH
BIAS OSC
T601
BIAS
TRAP
REC BIAS
SWITCH
Q639 – 641
A+9V
BIAS OSC
Q642, 643
39
37
AIN (R)
BIN (R)
15
14
3 4
EQOUT (R)
5
PB OUT (R)
TAI (R) MUTE
REC/PB EQ AMP, ALC
IC601
8
REC-
OUT (R) REC-IN (R)
ALC (R)
10
R-CH
R-CH
C
(Page 21)
PB
L-CH
B
(Page 21)
TUNER
L-CH
D
(Page 21)
REC
L-CH
42 TC BIAS-ON
SYSTEM CONTROLLER
(CD MECHANISM CONTROL)
IC401 (2/4)
• SIGNAL PATH
• R-ch is omitted due to same as L-ch.
: TUNER (FM/AM)
: TAPE PLAY
: REC
DO
CE
MUTING
TUNED
STEREO
RDS DATA
RDS INT
DATA
INT
DI
CLK
MUTE ON/OFF
REC MUTE ON/OFF
40 41
TC REC/MUTE
TC LINE MUTE
EQ
ALC
RV652
43
TC PB/REC
2
RDS DATA
18
RDS CLK
DATA
INT
7
ANTENNA
80
TC ALC
11
ALC ON/OFF
REC/PB
SWITCHING
Q680, 681
REC LEVEL
(L)
59
CAPSTAN/REEL
MOTOR DRIVE
Q692, 694
58
90
38
91
TRIGGER
PLUNGER DRIVE
Q691, 693
MM
(TAPE DECK BLOCK)
(CAPSTAN/REEL)
TC CAPM-CONT
TC TRG
TC END SW
TC PLAY SW
TC HALF/REC/SW