Sony HCD-CP2A Service manual

HCD-CP2A

SERVICE MANUAL

AEP Model

UK Model

E Model

Australian Model

HCD-CP2A is the Amplifier, CD player, Tape Deck and Tuner section in CMT-CP2WA.

Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation.

“DOLBY” and the double-D symbol; are trademarks of Dolby Laboratories Licensing Corporation.

		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

SPECIFICATIONS

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

CD player section

System	Compact disc and digital audio
	system
Laser	Semiconductor laser
	(λ = 780 nm)
	Emission duration: continuous
Laser output	MAX 44.6 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

– Continued on next page –

COMPACT DISC DECK RECEIVER

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.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 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.

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

2

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 the 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.

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.

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 LÁTH ATATLAN LÉZERSU-

GÁRVESZÉLY ! KERÜLJE A BESUGÁRZÁST !

SECTION 1

SERVICING NOTES

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body.

During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts.

The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

• MODEL IDENTIFICATION

– Rear Panel –

Power Voltage Indication

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

3

SECTION 2 GENERAL

• LOCATION OF CONTROLS

– Front View –

		1		2 3
							4
qf							5
qg	bB	x			bB	x
							6
	m	M	X	z	m	M
qh							7
qj						+	8
						–
qk							9
							q;
					Z
					u x		qa
					. >
					m	M
							qs
							qd
	ql	w;

wa ws wd wfwg

bB	x
m	M			X	z
ed
ef	eg	eh	ej	ek

bB x

wh

mM

wj

+

– wk

		wl
Z
u	x	e;

.	>
m	M
	ea
	es

1 TAPE A deck

2 TAPE B deck

3 Liquid crystal display

4 TAPE B Ybutton

5 TAPE B xbutton

6 TAPE B Mbutton

7 TAPE B mbutton

8 VOLUME knob

9 TREBLE knob

0 BASS 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

4

This section is extracted from instruction manual.

Additional

Information

TAPE

Remote Foroperating Function

Button(s) the

TAPEA(orB)DeckAorB Startsplayback.

nN Eachtimeyou

pressthisbutton,

thetapereverses

direction.

s DeckAorB Stopsplayback.

S DeckAorB Pausesplayback.

j/J DeckAorB Fast-forwardsor rewinds.

zREC DeckB Recordstotapes.

DIRMODE* DeckAorB Selects“ ”,

“ ”or“R”.

DOLBYNR* DeckAorB Turnsonoroffthe

DolbyNRsystem.

TIMER

Remote Function

Button(s)

SLEEP* Selectsasleeptime.

TIMERSET* Setsthetime,DailyTimeror

RECTimer.

TIMERSELECT* Checksthesettingsandturnson

oroffthetimer.

OTHERS

Remote Function Button(s)

?/1 Turnsonoroffthesystem.

VOL+/– Adjuststhevolume.

FUNCTION Selectsthesource.

DSG Generatesamoredynamic

sound.

Partsidentificationfor

theremote

Youcanalsooperatethesystemwiththesupplied

remote. Buttonsmarkedwith“*”areprovidedonlyonthe

remote.

TUNER

Remote Function Button(s)

TUNER/BAND SelectsFMorAM.

TUNINGMODE Selects“AUTO”,“PRESET”or “MANUAL”.

MEMORY* Presetsastation.

STEREO/MONO* Selects“STEREO”or“MONO”.

l/L Selectsapresetnumber.

j/J Scansforastationorselectsa

presetstation.

CD

Remote Function

Button(s)

CDH Startsplayback.

s Stopsplayback.

S Pausesplayback.

l/L Selectsatrack(AMS:Automatic MusicSensor).

j/J Locatesadesiredpointina

track.

CDREPEAT Repeatsplayback.

PLAYMODE SelectsShuffle,Programor

NormalPlay.

DISPLAY* Changesthefrontpaneldisplay.

3PressENTER.

Theminuteindicationflashes.

1300

4l/LPressrepeatedlytosetthe

minute.

1310

5PressENTER.

Theclockstartsworking.

Toreset the system clock

Youcanresetthesystemclockwhenthesystemis

on.

1PressTIMERSET.

2Pressl/Lrepeatedlyuntil

“SETCLOCK”appears,thenpressENTER.

3Repeatstep2to5in“Step2:Settingthetime”.

Tip

Ifyoumakeamistake,startoverfromstep1.

Step2:Settingthetime

Beforeyoucanusethesystem’stimerfunctions,

Theclockusesa24-hoursystemontheEuropean

model,anda12-hoursystemonothermodels.

The24-hoursystemisusedhereforillustration

2,4

Thehourindicationflashes.

000

2l/LPressrepeatedlytosetthe

1300

settheinternalclock.

1PressTIMERSET.

purposes.

1

3,5

hour.

33

6

5

SECTION 3

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

COVER (UPPER)

3 cover (upper)

1 two case screws

2 six screws (BTP3 × 8)

1 two case screws

FRONT PANEL ASS’Y

2 two connectors (CN805, 808)

1 wire (flat type)(17 core)(22 cm)

2connector (CN311)

1wire (flat type)(14 core) (CN401)

6 front panel ass’y

4 screw (KTP3 × 6)

1 wire (flat type)(FFC)(17 core)

(23 cm)(CN801)

5 two bosses	1 wire (flat type)(21 core)
	(CN803)
	1 wire (flat type)(23 core)
	(CN806)
3 two screws
(BTP3 × 8)	4 screw
	(KTP3 × 6)

6

TAPE MECHANISM DECK SECTION

2 Push these buttons.

1 six screws (BTP3 × 8)

3 tape mechanism deck section

CD MECHANISM DECK (CDM55D-K5BD41)

2 connector (CN304)

3 screw (BTP3 × 8)

1 wire (flat type)(19 core) (CN301)

4 CD mechanism deck (CDM55D-K5BD41)

7

BASE UNIT (BU-K5BD41)

1 floating screw (PTPWHM2.6)

2 base unit (BU-K5BD41)

TRAY, LOADING BOARD

2 belt (CDM55)

B

A

1 Rotate the gear(B) in the direction of arrow A.

3 Pull the tray pushing B.

5 LOADING board

4two screws

(BTP2.6 × 6)

8

CAM (CDM55)

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

9

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.While pressing the I/1 and x (TAPE A) 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/1 button 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] simultaneously.

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/1 button to turn the power OFF.

Aging mode sequence:

Start

Open the disc tray

Close the disc tray

Play the last track

[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/1 button to turn the power OFF.

Aging mode sequence:

Start

FWD play for 2 minutes *1

Fast forward for

20 seconds or till shut off

TAPE A

REV play for 3 minutes

Rewind for 10 seconds

Shut off

FWD Play

1 minute

REC pause for 3 seconds

Shut off

FWD REC

3 minutes

Fast forward for

20 seconds or till shut off

TAPE B

REV play for 1 minute

REC pause for 3 seconds

REV REC for 3 minutes

Rewind for 30 seconds or till shut off

*1) When it shuts off within 2 minutes, it

REV plays rest of the time then goes to the next step.

10

SECTION 5

MECHANICAL ADJUSTMENTS

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

•Tape Tension Measurement

•Torque Measurement

	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
		CQ-102C	2 to 6 g•cm
	Back Tension
			(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
		CQ-102RC	2 to 6 g•cm
	Back Tension
			(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)

• 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 6

ELECTRICAL ADJUSTMENTS

TAPE DECK SECTION 0 dB=0.775 V

1.Demagnetize the record/playback head with a head demagnetizer. (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 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.

• Test Tape

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

Record/ Playback Head Azimuth Adjustment

DECK A DECK B

Note: Perform this adjustments for both decks

Procedure:

test tape P-4-A100

(10 kHz, –10 dB)

MAIN board IC306

Pin r; (L-CH)

Pin 3 (R-CH) level meter

set

+

–

MAIN board IC306

Pin rl

11

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.

	within
L-CH	1dB
			within
peak	output
			1dB
	level
	R-CH
Screw	peak		Screw
position	L-CH	R-CH	position
	peak	peak

3. Mode: Playback (FWD)

	test tape
	P-4-A100		oscilloscope
	(10 kHz, –10 dB)	pin r;
	L-CH
	MAIN	pin rl
		L	V	H
	board
	IC401	R
	set

R-CH

pin 3

waveform of oscilloscope

in phase 45 ° 90 ° 135 ° 180 °

good wrong

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.

reverse

forward

Tape Speed Check DECK A DECK B

Procedure:

Mode: Playback (FWD)

test tape

WS-48B frequency counter (3 kHz, 0 dB)

	set	+
		–

MAIN board IC306(Pin r; : L-CH)

(Pin 3: R-CH)

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 X button. 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 [RECz], X and Y button. 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 beginning 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 DECK A DECK B

Procedure:

Mode: Playback (FWD)

	test tape
	P-4-L300	level meter
	(315 Hz, 0 dB)
	set	+
		–
	MAIN board
	IC306	(Pin r; : L-CH)
		(Pin 3 : R-CH)

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

12

Record bias Current Adjustment DECK B

Procedure:

1. Mode: Record

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)

	AF OSC	blank tape
	600 Ω
		CN-123
	attenuator
		set

Pin rl (GND) of IC306 on the MAIN board.

2. Mode: Playback

Adjustment and Checking Location:

– MAIN BOARD (Conductor Side) –

Record Level (L)

RV101 49 40

recorded		level meter
portion
	set	+
		–

RV201

3

IC306

Record Level (R)

IC306 (Pin r; : L-CH) (Pin 3 : R-CH)

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 DECK B

Procedure:

1. Mode: Record

– TC BOARD (Component Side) –

Playback Level		Playback Level	Record Bias
(Deck-A)		(Deck-B)	Current
L	R	L R	L R
			RV403
RV401	RV421	RV402 RV422	RV423

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)
	AF OSC	blank tape
	600 Ω
		CS-123
	attenuator
	set

Pin rl (GND) of IC306 on the MAIN board.

2. Mode: Playback

	recorded	level meter
	portion
	set	+
		–
	IC306	(Pin r; : L-CH)
		(Pin 3 : R-CH)

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

13

CD SECTION

Note:

1.CD Block is basically constructed to operate without adjustment.

2.Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10 MΩ 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.

5.Check the focus bias check when optical block is replaced.

Focus Bias Check

oscilloscope (DC range)

BD board

TP (RF) +

TP (VC) –

Procedure :

1.Connect oscilloscope to TP (RF) and TP (VC) on the CD board.

2.Press the I/1 button 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 playback.

4.Confirm that oscilloscope waveform is as shown in the figure below. (eye pattern)

A good eye pattern means that the diamond shape (s) in the center of the waveform can be clearly distinguished.

VOLT/DIV: 200 mV

TIME/DIV: 500 ns

level:

1.2 ± 0.1 Vp-p

– CD BOARD (Conductor Side) –

IC103

TP (RF)

TP (VC)

Checking Location:

14

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 Ω and 1/4 W or less unless otherwise specified.

•f : internal component.

•C: panel designation.

Note: The components identified by mark 0or dotted line with mark 0are critical for safety.

Replace only with part number specified.

•U : B+ Line.

•V : B– Line.

•H: adjustment for repair.

•Voltages are taken with a VOM (Input impedance 10 MΩ ). Voltage variations may be noted due to normal production tolerances.

•Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal production 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

HCD-CP2A

• Circuit Boards Location

POWER board

TUNER PACK (TCB-020)(AEP, UK, Australian)

TUNER PACK (TCB-020N)(Saudi Arabia)

LCD board

TC board

CONTROL board

AMP board

HEADPHONE board

MAIN board

LOADING board

CD board

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HCD-CP2A

7-2. PRINTED WIRING BOARD – CD Board – • See page 15 for Circuit Boards Location.

• Semiconductor

Location

Ref. No.

Location

IC101

C-2

IC102

B-3

IC103

C-2

Q101

B-1

(Page 23)

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HCD-CP2A

7-3. SCHEMATIC DIAGRAM – CD Section – • See page 29 for Waveforms. • See page 31 for IC Block Diagrams.

(Page 21)

• 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.

Replace only with part number specified.

17 17