Sony HCD-CP2A User manual

SERVICE MANUAL
CD player section
System Compact disc and digital audio
system
Laser Semiconductor laser
(λ= 780 nm)
Emission duration: continuous
Laser output MAX 44.6
µ W*
* This output is the value
measured at a distance of
200 mm from the objective
lens surface on the Optical
Pick-up Block with 7 mm
aperture.
Wavelength 780 - 790 nm
Frequency response 20 Hz - 20 kHz (±0.5 dB)
Tape player section
Recording system 4-track 2-channel stereo
Frequency response (DOLBY NR OFF)
50 - 13,000 Hz (±3 dB), using a
Sony TYPE I cassette
50 - 14,000 Hz (±3 dB),
using a Sony TYPE II cassette
Amplifier section
European and Australian models:
DIN power output (rated): 30 + 30 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
35 + 35 W
(6 ohms at 1 kHz, 10% THD)
Music power output (reference):
130 W
Other models:
The following measured at 230 V AC, 60 Hz
DIN power output (rated): 30 + 30 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
35 + 35 W
(6 ohms at 1 kHz, 10% THD)
The following measured at 220 V AC, 60 Hz
DIN power output (rated): 28 + 28 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
33 + 33 W
(6 ohms at 1 kHz, 10% THD)
Inputs
MD IN (phono jacks): Sensitivity 500 mV, impedance
47 kilohms
VIDEO IN (phono jacks): Sensitivity 250 mV, impedance
47 kilohms
Outputs
LINE OUT (phono jacks): Sensitivity 250 mV, impedance
1 kilohm
OPTICAL DIGITAL OUT CD:
Optical
PHONES (stereo phone jack):
Accepts headphones with an
impedance of 8 ohms or more
SPEAKER: Active speaker system, 6 ohms
COMPACT DISC DECK RECEIVER
SPECIFICATIONS
HCD-CP2A
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol ;are trade-
marks of Dolby Laboratories Licensing Corporation.
AEP Model
UK Model
E Model
Australian Model
HCD-CP2A is the Amplifier, CD player,
Tape Deck and Tuner section in
CMT-CP2WA.
– Continued on next page –
Model Name Using Similar Mechanism NEW
CD CD Mechanism Type CDM55D-K5BD41
Section Base Unit Name BU-K5BD41
Optical Pick-up Name KSM-213CKP/K1N
TAPE Model Name Using Similar Mechanism NEW
Section Tape Transport Mechanism Type CMBL6Z112

2
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 ....................................................... 4
Setting the Time .............................................................. 5
Parts Identification for the Remote................................. 5
3. DISASSEMBLY ......................................................... 6
4. TEST MODE.............................................................. 10
5. MECHANICAL ADJUSTMENTS ....................... 11
6. ELECTRICAL ADJUSTMENTS
Tape Deck Section .......................................................... 11
CD Section ...................................................................... 14
7. DIAGRAMS
7-1. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 15
7-2. Printed Wiring Board – CD Board – .............................. 16
7-3. Schematic Diagram – CD Section – ............................... 17
7-4. Printed Wiring Board – TC Board – ............................... 18
7-5. Schematic Diagram – TC Section – ............................... 19
7-6. Schematic Diagram – MAIN Section (1/3) –................. 20
7-7. Schematic Diagram – MAIN Section (2/3) –................. 21
7-8. Schematic Diagram – MAIN Section (3/3) –................. 22
7-9. Printed Wiring Board – MAIN Board – ......................... 23
7-10. Printed Wiring Board – LOADING Board –.................. 24
7-11. Printed Wiring Board – LCD Board – ............................ 24
7-12. Printed Wiring Boards
– AMP/HEADPHONE Boards – .................................... 24
7-13. Schematic Diagram – AMP Section – ............................ 25
7-14. Printed Wiring Board – CONTROL Board – ................. 26
7-15. Schematic Diagram – CONTROL Section –.................. 27
7-16. Printed Wiring Board – POWER Board – ...................... 28
7-17. Schematic Diagram – POWER Section – ...................... 28
7-18. IC Pin Function Description ........................................... 35
8. EXPLODED VIEWS................................................ 38
9. ELECTRICAL PARTS LIST ............................... 43
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 ohm unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
European and Australian models:531 - 1,602 kHz
(with the tuning interval set at
9 kHz)
Other models: 530 - 1,710 kHz
(with the tuning interval set at
10 kHz)
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
European and Australian models:230 V AC, 50/60 Hz
Other models: 110 - 120 V or 220 - 240 V AC ,
50/60 Hz
Adjustable with voltage selector
Power consumption 70 W
Dimensions (w/h/d) Approx. 225 ×273 ×337 mm
(8
7
/ 8 ×10
3
/ 4 ×13
3
/ 8 in) incl.
projecting parts and controls
Mass Approx. 6.7 kg
(14 lb 12 oz)
Design and specifications are subject to change
without notice.

3
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
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation 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.
The following caution label is located inside the unit.
CAUTION : INVISIBLE LASER RADIATION WHEN OPEN AND
INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
ADVARSEL : USYNLIG LASERSTRÅLING VED ÅBNING NÅR
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGÅ UDSAETTELSE
FOR STRÅLING.
VORSICHT : UNSICHTBARE LASERSTRAHLUNG, WENN
ABDECKUNG GEÖFFNET UND SICHEREITSVERRIEGELUNG
ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN.
VARO!: AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALT-
TIINA NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.
VARNING : OSYNLING LASERSTRÅLING NÄR DENNA DEL ÄR ÖPPNAD
OCH SPÄRREN ÄR URKOPPLAD.BETRAKTA EJ STRÅLEN.
ADVERSEL : USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG
SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.
VIGYAZAT!: A BURKOLAT NYITÁSAKOR LÁTHATATLAN LÉZERSU-
GÁRVESZÉLY!KERÜLJE A BESUGÁRZÁST!
• MODEL IDENTIFICATION
– Rear Panel –
Model Power Voltage Indication
AEP, UK,
North European and AC: 230 V -50/60 Hz 70 W
Australian models
Saudi Arabia AC: 110 – 120/220 – 240 V
-50/60 Hz 70 W
Power Voltage Indication
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.

4
b B x
mM
b B x
mM
x
.>
Xz
u
+
–
Z
mM
123
4
5
6
7
8
9
q;
qa
qs
qd
w;ql
qk
qj
qh
qg
qf
b B x
mM
b B x
mM
x
.>
Xz
u
+
–
Z
mM
wa ws wd wfwg
wh
wj
wk
wl
e;
ea
es
ed
ekejehegef
SECTION 2
GENERAL
• LOCATION OF CONTROLS
– FrontView –
1TAPE A deck
2TAPE B deck
3Liquid crystal display
4TAPE B Ybutton
5TAPE B xbutton
6TAPE B Mbutton
7TAPE B mbutton
8VOLUME knob
9TREBLE knob
0BASS knob
qa CD EJECT Zbutton
qs CD REPEAT button
qd CD PLAY MODE button
qf TAPE A xbutton
qg TAPE A Ybutton
qh TAPE A mbutton
qj TAPE A Mbutton
qk Remote control sensor
ql PHONES jack
w; CD disc tray
wa HI-SPEED DUBBING AtB button and indicator
ws DSG button and indicator
wd Xbutton (TAPE A/B)
wf CD SYNC button and indicator
wg REC button
wh TUNING MODE button
wj TUNER BAND button
wk TUNING +/– buttons
wl CD ubutton
e; CD xbutton
ea >Mbutton
es .mbutton
ed I/1button and indicator
ef VIDEO button and indicator
eg MD button and indicator
eh TAPE button and indicator
ej CD button and indicator
ek TUNER button and indicator

5
This section is extracted from
instruction manual.
6
Step 2: Setting the time
Before you can use the system’s timer functions,
set the internal clock.
The clock uses a 24-hour system on the European
model, and a 12-hour system on other models.
The 24-hour system is used here for illustration
purposes.
3,5
1
2,4
1
Press TIMER SET.
The hour indication flashes.
000
2
Press l/L repeatedly to set the
hour.
1300
3
Press ENTER.
The minute indication flashes.
1300
4
Press l/L repeatedly to set the
minute.
1310
5
Press ENTER.
The clock starts working.
To reset the system clock
You can reset the system clock when the system is
on.
1Press TIMER SET.
2Press l/L repeatedly until
“SET CLOCK”appears, then press ENTER.
3Repeat step 2 to 5 in “Step 2: Setting the time”.
Tip
If you make a mistake, start over from step 1.
33
Additional Information
Parts identification for
the remote
You can also operate the system with the supplied
remote.
Buttons marked with “*”are provided only on the
remote.
TUNER
Remote
Button(s) Function
TUNER/BAND Selects FM or AM.
CD
Remote
Button(s) Function
CD H
sStops playback.
SPauses playback.
l/L Selects a track (AMS: Automatic
Music Sensor).
j/J Locates a desired point in a
track.
CD REPEAT Repeats playback.
TAPE
Remote
Button(s) For operating
the Function
TAPE A (or B)
nN Deck A or B Starts playback.
Each time you
press this button,
the tape reverses
direction.
sDeck A or B Stops playback.
SDeck A or B Pauses playback.
j/J Deck A or B Fast-forwards or
rewinds.
zREC Deck B Records to tapes.
Remote
Button(s) Function
?/1 Turns on or off the system.
VOL +/–Adjusts the volume.
FUNCTION Selects the source.
TUNING MODE Selects “AUTO”, “PRESET”or
“MANUAL”.
MEMORY* Presets a station.
STEREO/MONO* Selects “STEREO”or “MONO”.
l/L Selects a preset number.
j/J Scans for a station or selects a
preset station.
Starts playback.
PLAY MODE Selects Shuffle, Program or
Normal Play.
DISPLAY* Changes the front panel display.
DIR MODE* Deck A or B Selects “”,
“”or “R”.
DOLBY NR* Deck A or B Turns on or off the
Dolby NR system.
TIMER
Remote
Button(s) Function
SLEEP* Selects a sleep time.
TIMER SET* Sets the time, Daily Timer or
REC Timer.
TIMER SELECT* Checks the settings and turns on
or off the timer.
OTHERS
DSG Generates a more dynamic
sound.

6
2two connectors
(CN805, 808)
2connector
(CN311)
1wire (flat type)(17 core)(22 cm)
1wire (flat type)(14 core)
(CN401)
6front panel ass’y
4screw
(KTP3 ×6)
5two bosses
3two screws
(BTP3 ×8) 4screw
(KTP3 ×6)
1wire (flat type)(23 core)
(CN806)
1wire (flat type)(21 core)
(CN803)
1wire (flat type)(FFC)(17 core)
(23 cm)(CN801)
COVER (UPPER)
FRONT PANEL ASS’Y
Note: Follow the disassembly procedure in the numerical order given.
SECTION 3
DISASSEMBLY
2six screws
(BTP3 ×8)
3cover (upper)
1two case screws
1two case screw
s

7
TAPE MECHANISM DECK SECTION
CD MECHANISM DECK (CDM55D-K5BD41)
1six screws
(BTP3 ×8
)
2Push these buttons.
3tape mechanism deck section
2connector
(CN304)
3screw
(BTP3 ×8)
1wire (flat type)(19 core)
(CN301)
4CD mechanism deck
(CDM55D-K5BD41)

8
BASE UNIT (BU-K5BD41)
TRAY, LOADING BOARD
1floating screw
(PTPWHM2.6)
2base unit
(BU-K5BD41)
2belt (CDM55)
B
3Pull the tray pushing B.
4two screws
(BTP2.6 ×6)
5LOADING board
1Rotate the gear(B) in
the direction of arrow A.
A

9
CAM (CDM55)
2lever (SW)
1torsion spring
6gear (B)
3spacer (55)
4pulley (LDG)
5gear (A)
7roller
8cam (CDM55)

10
[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. While pressing the I/1and x(TAPEA) button, connect the
power cord.
2. The set is reset.
[Liquid Crystal Display All Lit Check Mode]
Procedure:
1. Set to standby state.
2. Press three buttons of x(TAPE B), x(CD), and [VIDEO]
(function) simultaneously.
3. Liquid crystal display are all turned on.
4. To release from this mode, press the I/1button to turn the
power OFF.
[ROM Version Display Mode]
Procedure:
1. Set to standby state.
2. Press three buttons of x(TAPE B), x(CD), and [DSG] si-
multaneously.
3. The ROM version is displayed.
[CD Aging Mode]
This mode can be used for operation check of CD section.
Procedure:
1. Load a CD disc.
2. Set to standby state.
3. Press three buttons of x(TAPE B), x(CD), and [TUNER]
(function) simultaneously.
4. The aging is executed in bellow sequence.
5. To release from the aging mode, press the I/1button to turn
the power OFF.
Aging mode sequence:
SECTION 4
TEST MODE
Start
REC pause for 3 seconds
FWD REC
REV play for 1 minute
FWD Play Shut off
Shut off
1 minute
3 minutes
Rewind for 10 seconds
REV play for 3 minutes
FWD play for 2 minutes *1
REC pause for 3 seconds
REV REC for 3 minutes
Fast forward for
20 seconds or till shut off
Fast forward for
20 seconds or till shut off
Rewind for 30 seconds
or till shut off
TAPE A
TAPE B
*1) When it shuts off within 2 minutes, it
REV plays rest of the time then goes
to the next step.
[Tape Deck Aging Mode]
This mode can be used for operation check of tape deck section.
Procedure:
1. Set tapes in the tape deck-A and B.
2. Set to standby state.
3. Press three buttons of x(TAPE B), x(CD), and [TAPE]
(function) simultaneously.
4. The aging is executed in bellow sequence.
5. To release from the aging mode, press the I/1button to turn
the power OFF.
Aging mode sequence:
Start
Open the disc tray
Close the disc tray
Play the last track

11
0 dB=0.775 VTAPE DECK SECTION
SECTION 6
ELECTRICAL ADJUSTMENTS
1. Demagnetize the record/playback head with a head demagne-
tizer. (Do not bring the head demagnetizer close to the erase
head)
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 ad-
justment 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 other-
wise specified.
•TestTape
Record/ Playback Head Azimuth Adjustment
DECK A DECK B
Note: Perform this adjustments for both decks
Procedure:
set
MAIN board
IC306
Pin r; (L-CH)
Pin 3(R-CH)
MAIN board
IC306
Pin rl
+
–
level meter
test tape
P-4-A100
(10 kHz, –10 dB)
Tape Signal Used for
P-4-A100 10 kHz, –10 dB Azimuth Adjustment
WS-48B 3 kHz, 0 dB Tape Speed Check
P-4-L300 315 Hz, 0 dB Level Adjustment
Mode Torque Meter Meter Reading
3.53 ~ 5.98 mN•m
Forward CQ-102C 36 to 61 g•cm
(0.50 – 0.84 oz•inch)
Forward 0.20 ~ 0.58 mN•m
Back Tension CQ-102C 2 to 6 g•cm
(0.026 – 0.082 oz•inch)
3.53 ~ 5.98 mN•m
Reverse CQ-102RC 36 to 61 g•cm
(0.50 – 0.84 oz•inch)
Reverse 0.20 ~ 0.58 mN•m
Back Tension CQ-102RC 2 to 6 g•cm
(0.026 – 0.082 oz•inch)
5.99 ~ 14.02 mN•m
FF, REW CQ-201B 61 to 143 g•cm
(0.85 – 1.98 oz•inch)
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 demagne-
tizer.
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
• Tape Tension Measurement
•Torque Measurement
•Tape Tension Measurement
Mode Tension Meter Meter Reading
Forward CQ-403A more than 9.8 N
more than 100 g (3.52 oz)
Reverse CQ-403R more than 9.8 N
more than 100 g (3.52 oz)
SECTION 5
MECHANICAL ADJUSTMENTS

12
Tape Speed Check
Procedure:
Mode: Playback (FWD)
1. Insert the WS-48B into the deck A and the blank tape into the
deck B.
2. Press the [HI-SPEED DUBBING] button and Xbutton.
Then at HIGH speed dubbing.
3. Check that frequency counter reads 6,000 ± 180 Hz.
4. Press the x(TAPE A or B) button to stop the HIGH speed
dubbing.
5. Press the [REC ],Xand Ybutton.
Then at NORMAL speed dubbing.
6. Check that frequency counter reads 3,000 ± 90 Hz.
7. Press the x(TAPE A or B) button to stop the NORMAL speed
dubbing.
8. Frequency difference between deck A and deck B the begin-
ning of the tape should be within ± 1.5%.
Checking Location: MAIN board
Sample Value of Wow and flutter: 0.3% or less W. RMS (JIS)
(WS-48B)
Playback level Adjustment
Procedure:
Mode: Playback (FWD)
Deck A is RV401 (L-CH) and RV421 (R-CH), Deck B is RV402
(L-CH) and RV422 (R-CH) on the TC board so that adjustment
within adjustment level as follows.
Adjustment Level:
IC306 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: TC and MAIN boards
+
–
set
test tape
WS-48B
(3 kHz, 0 dB)
MAIN board
IC306(Pin r; : L-CH)
(
Pin 3: R-CH
)
frequency counter
+
–
set
test tape
P-4-L300
(315 Hz, 0 dB)
MAIN board
IC306 (Pin r; : L-CH)
(
Pin 3: R-CH
)
level meter
1. Mode: Playback (FWD)
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 (FWD)
4. Repeat steps 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location: Record/Playback Head (Deck A and B)
and MAIN board.
Screw
position
L-CH
peak
within
1dB
output
level
L-CH
peak
R-CH
peak
within
1dB
Screw
position
R-CH
peak
MAIN
board
IC401
set
test tape
P-4-A100
(10 kHz, –10 dB)
pin 3
oscilloscope
L-CH
R-CH
VH
waveform of oscilloscope
in phase 45 °90 °135 °180 °
good
wrong
pin rl
pin r;
L
R
revers
e
forward
DECK A DECK B
z
DECK A DECK B

13
Record Level (L)
Record Level (R)
RV101
RV201 IC306
40
49
3
Record bias Current Adjustment
Procedure:
1. Mode: Record
2. Mode: Playback
Confirm playback the signal recorded in step 1 become adjustable
limits as follows.
If these levels do not adjustable limits, adjustment the RV403 (L-
CH) and RV423 (R-CH) on the TC board to repeat steps 1 and 2.
Adjustable limits: Playback output of 315 Hz to playback output
of 10 kHz: 0 ± 0.5 dB
Adjustment Location: TC and MAIN boards
Record Level Adjustment
Procedure:
1. Mode: Record
2. Mode: Playback
Confirm playback the signal recorded in step 1 become adjustable
limits as follows.
If these levels do not adjustable limits, adjustment the RV101 (L-
CH) and RV201 (R-CH) on the MAIN board to repeat steps 1 and
2.
Adjustable limits:
IC306 PB level: 36.7 to 41.1 mV (–26.5 to –25.5 dB)
Adjustment Location: MAIN board
DECK B
attenuator
set
Pin rd (L-CH) of IC306 on the MAIN board.
Pin th (R-CH) of IC306 on the MAIN board.
1) 315 Hz
2) 10 kHz 50 mV (–23.8 dB)



Pin rl (GND) of IC306 on the MAIN
board.
600 Ω
blank tape
CN-123
AF OSC
+
–
set
recorded
portion
IC306 (Pin r; : L-CH)
(
Pin 3: R-CH
)
level meter
DECK B
set
Pin rd (L-CH) of IC306 on the MAIN board.
Pin th (R-CH) of IC306 on the MAIN board.
315 Hz, 50 mV (–23.8 dB)
blank tape
CS-123
Pin rl (GND) of IC306 on the MAIN board.
600 Ω
attenuator
AF OSC
+
–
set
recorded
portion
IC306 (Pin r; : L-CH)
(
Pin 3: R-CH
)
level meter
Adjustment and Checking Location:
– MAIN BOARD (Conductor Side) –
–TC BOARD (Component Side) –
RV401 RV421 RV402 RV422
RV403
RV423
LL LRR R
Playback Level
(Deck-A)
Playback Level
(Deck-B)
Record Bias
Current

14
IC103
TP (RF)
TP (VC)
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 block is replaced.
Focus Bias Check
Procedure :
1. Connect oscilloscopetoTP(RF) andTP (VC) onthe CD board.
2. Press the I/1button to turn the power on, and press the Z
(CD) button to open the CD disc tray.
3. Put disc (YEDS-18) in and press the u(CD) button to play-
back.
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.
Checking Location:
+
–
BD board
TP (RF)
TP (VC)
oscilloscope
(DC range)
VOLT/DIV: 200 m
V
TIME/DIV: 500 ns
level:
1.2 ±0.1 Vp-p
s
– CD BOARD (Conductor Side) –

1515
HCD-CP2A
SECTION 7
DIAGRAMS
7-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Boards:
•X: parts extracted from the component side.
•Y: parts extracted from the conductor side.
•W: indicates side identified with part number.
•b: Pattern from the side which enables seeing.
• Abbreviation
AUS : Australian model
EA : Saudi Arabia model
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
•f: internal component.
•C: panel designation.
•U: B+ Line.
•V: B– Line.
•H: adjustment for repair.
• Voltages aretakenwithaVOM (Inputimpedance10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F:TUNER
E:TAPE PLAY (DECK A)
d:TAPE PLAY (DECK B)
G:TAPE REC
J: CD PLAY (ANALOG)
c: CD PLAY (DIGITAL)
• Abbreviation
AUS : Australian model
EA : Saudi Arabia model
Note: The components identified by mark 0or dotted line
with mark 0are critical for safety.
Replace only with part number specified.
• Circuit Boards Location
POWER board
LCD board
TC board
CONTROL board
HEADPHONE board
LOADING board
CD board
MAIN board
AMP board
TUNER PACK (TCB-020)(AEP, UK, Australian)
TUNER PACK (TCB-020N)(Saudi Arabia)

1616
HCD-CP2A
IC101 C-2
IC102 B-3
IC103 C-2
Q101 B-1
7-2. PRINTED WIRING BOARD – CD Board – • See page 15 for Circuit Boards Location.
• Semiconductor
Location
Ref. No. Location
(Page 23)

1717
HCD-CP2A
7-3. SCHEMATIC DIAGRAM – CD Section – • See page 29 forWaveforms. •See page 31 for IC Block Diagrams.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD PLAY
∗: Impossible to measure
The components identified by mark 0or dotted
line with mark 0are critical for safety.
Replaceonlywith part numberspecified.
(Page 21)

1818
HCD-CP2A
7-4. PRINTED WIRING BOARD –TC Board – • See page 15 for Circuit Boards Location.
• Semiconductor
Location
Ref. No. Location
IC401 B-6
IC402 B-2
IC403 B-2
Q401 B-2
Q402 B-1
Q403 A-2
Q404 A-2
(Page 23)

1919
HCD-CP2A
7-5. SCHEMATIC DIAGRAM –TC Section – • See page 29 for Waveforms.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark :TAPE PLAY
〈〈 〉〉 :TAPE REC
(Page 20)

2020
HCD-CP2A
7-6. SCHEMATIC DIAGRAM – MAIN Section (1/3) –
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : CD PLAY
[ ] :TAPE PLAY
〈〈 〉〉 :TAPE REC
(Page 19)
(Page 22)
(Page 21)