Sony HCD-ZX10 Service manual

HCD-ZX10

SERVICE MANUAL

HCD-ZX10 is the tuner, deck, CD and amplifier section in MHC-ZX10.

US Model

Canadian Model

AEP Model

UK Model

		Model Name Using Similar Mechanism	NEW
	CD
		CD Mechanism Type	CDM53F-K2BD38
	SECTION
		Base Unit Type	BU-K2BD38
		Optical Pick-up Type	KSM-213DAP/Z-NP
	TAPE DECK	Model Name Using Similar Mechanism	NEW
	SECTION
		Tape Transport Mechanism Type	TCM-230AWR12

Amplifier section

AUDIO POWER SPECIFICATIONS: (US model only)

POWER OUTPUT AND TOTAL HARMONIC DISTORTION:

with 8 Ω loads both channels driven, from 120– 10,000 Hz; rates 110 W per channel minimum RMS power, with no more than 10 % total harmonic distortion from 250 mW to rated output.

Total harmonics distortion Less than 0.07%

(8 Ω at 1 kHz, 60 W)

Canadian model:

Continuous RMS power output (reference) 100 + 100 W (8 Ω at 1 kHz, 10% THD)

Total harmonics distortion

Less than 0.07%

(8 Ω at 1 kHz, 60 W)

Expect US, Canadian:

DIN power output (rated) 80 + 80 W

(8 Ω at 1 kHz, DIN) Continuous RMS power output (reference)

100 + 100 W (8 Ω at 1 kHz, 10% THD)

Music power output (reference)

170 + 170 W (8 Ω at 1 kHz, 10% THD)

SPECIFICATIONS

Inputs
VIDEO (AUDIO) IN:	voltage 250 mV,
(phono jacks)	impedance 47 kΩ
MD IN:	voltage 450 mV,
(phono jacks)	impedance 47 kΩ
Outputs
MD OUT:	voltage 250 mV
(phono jacks)	impedance 1 kΩ
PHONES:	accepts headphones of
(stereo mini jack)	8 Ω or more
FRONT SPEAKER:	accepts impedance of 8 to 16 Ω
SURROUND SPEAKER: accepts impedance of 16 Ω
SUPER WOOFER:	Voltage 1 V, impedance 1 kΩ

CD OPTICAL DIGITAL OUT

(Square optical connector jack, rear panel)

Wavelength	660 nm
Output Level	–18 dBm

Tape player section

Recording system	4-track 2-channel stereo
Frequency response	40 – 13,000 Hz (±3 dB),
(DOLBY NR OFF)	using Sony TYPE I cassette
	40 – 14,000 Hz (±3 dB),
	using Sony TYPE II cassette
Wow and flutter	±0.15% W.Peak (IEC)
	0.1% W.RMS (NAB)
	±0.2% W.Peak (DIN)

CD player section

System	Compact disc and digital audio
	system
Laser	Semiconductor laser
	(λ=780nm)
	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	2 Hz – 20 kHz (±0.5 dB)
Signal-to-noise ratio	More than 90 dB
Dynamic range	More than 90 dB

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range
US, Canadian models:	87.5	– 108.0	MHz (100 kHz step)
Other models:	87.5	– 108.0	MHz (50 kHz step)
Antenna	FM lead antenna
Antenna terminals	75 Ω unbalanced
Intermediate frequency	10.7	MHz

— Continued on next page —

MINI Hi-Fi COMPONENT SYSTEM

1

AM tuner section

Tuning range
US, Canadian models:	530 – 1,710 kHz
	(with the interval set at
	10 kHz)
	531 – 1,710 kHz
	(with the interval set at
	9 kHz)
Except US, Canadian models:
	531 – 1,602 kHz
	(with the interval set at
	9 kHz)
Antenna	AM loop antenna
Antenna terminals	External antenna terminal
Intermediate frequency	450 kHz

General

Power requirements

US, Canadian models: 120 V AC, 60 Hz Except US, Canadian models:

230 V AC, 50/60 Hz

Power consumption
US model:	190 W
Canadian model:	195 W
European model:	200 W
Dimensions (w/h/d)	Approx. 250 x 375 x 395 mm
Mass
US, Canadian models:	Approx. 11.5 kg
Except US, Canadian models:
	Approx. 11.0 kg
Supplied accessories:	AM loop antenna (1)
	FM lead antenna (1)
	Remote Commander (1)
	Batteries (2)
	Speaker cords (2)
	Front speaker pads (8)

Design and specifications are subject to change without notice.

SAFETY CHECK-OUT

(US model only)

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

AC

0.15µF 1.5kΩ voltmeter

(0.75V)

Earth Ground

Fig. A. Using an AC voltmeter to check AC leakage.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0OR 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.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LES

DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

2

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 component in this product is capable of emitting radiation exceeding the limit for Class 1.

This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.

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.

MODEL IDENTIFICATION

— BACK PANEL — Parts No.

TABLE OF CONTENTS

1.GENERAL ·········································································· 4

2.DISASSEMBLY

2-1. Case ···················································································· 7

2-2. Front Panel Section ···························································· 7 2-3. Tape Mechanism Deck Section (TCM-230AWR12) ·········· 8 2-4. Back Panel Section ····························································· 8 2-5. Main Board, Front AMP Board ·········································· 9 2-6. CD Base Unit (BU-K2BD38) ············································· 9 2-7. CD Mechanism Deck Section (CDM53F-K2BD38) ········ 10 2-8. Fitting Base (Guide) Assy, Bracket (Chassis) and

Fitting Base (Magnet) Assy ·············································· 10 2-9. Tray (Sub) ········································································· 11 2-10. Chassis (Mold B) Section, Stocker Section and

Slider (Selection) ······························································ 11 2-11. Gears Installation ······························································ 12 2-12. Slider (Selection) Installation ··········································· 12 2-13. Stocker Section Installation ·············································· 13 2-14. Chassis (Mold B) Section Installation ······························ 13

3.TEST MODE ···································································· 14

4.MECHANICAL ADJUSTMENTS ····························· 18

5.ELECTRICAL ADJUSTMENTS ······························· 18

6.DIAGRAMS

6-1. Circuit Board Location ····················································· 23

6-2. Block Diagrams ································································ 24 6-3. Printed Wiring Board – BD Section – ······························ 28 6-4. Schematic Diagram – BD Section – ································· 29 6-5. Printed Wiring Board – Deck Section – ··························· 30 6-6. Schematic Diagram – Deck Section – ······························ 31 6-7. Printed Wiring Board – Main Section – ··························· 32 6-8. Schematic Diagram – Main (1/3) Section – ····················· 33 6-9. Schematic Diagram – Main (2/3) Section – ····················· 34 6-10. Schematic Diagram – Main (3/3) Section – ····················· 35 6-11. Printed Wiring Board – AMP Section – ··························· 36 6-12. Schematic Diagram – AMP Section – ······························ 37 6-13. Printed Wiring Board – Panel Section – ··························· 38 6-14. Schematic Diagram – Panel Section – ····························· 39 6-15. Printed Wiring Board – Switch Section – ······················· 40 6-16. Schematic Diagram – Switch Section – ··························· 41 6-17. Printed Wiring Board – CD Mechanism Section – ·········· 42 6-18. Schematic Diagram – CD Mechanism Section – ············· 43 6-19. Printed Wiring Board – Power Supply Section – ············· 44 6-20. Schematic Diagram – Power Supply Section – ················ 45 6-21. Printed Wiring Board – Leaf SW Section – ····················· 46 6-22. Schematic Diagram – Leaf SW Section – ························ 46 6-23. IC Block Diagrams ··························································· 47 6-24. IC Pin Descriptions ·························································· 50

7. EXPLODED VIEWS

7-1. Back Panel Section ··························································· 54

7-2. Front Panel Section ·························································· 55

7-3. Chassis Section ································································· 56 7-4. CD Mechanism Deck Section-1 (CDM53F-K2BD38) ···· 57 7-5. CD Mechanism Deck Section-2 (CDM53F-K2BD38) ···· 58 7-6. Base Unit Section (BU-K2BD38A) ································· 59 7-7. Tape Mechanism Deck Section (TCM-230AWR12) ········ 60

8. ELECTRICAL PARTS LIST ······································· 61

MODEL	PARTS No.
US model	4-226-747-0s
CND model	4-226-747-1s
AEP, G, AED, UK, CIS models	4-226-747-2s

•Abbreviation

CND : Canadian model

AED : North European model

G : German model

3

SECTION 1 GENERAL

123 45 6 7 89

ws	0
	qa
wa	qs
	qd

w;	qf
	qg	ef
	qh	ed
ql		es

ea

qk qj

wd wf wg wh

wj wk

wl

e;

1	?/1button and indicator	ql	PHONES jack
2	TAPE A hbutton and indicator	w;	FUNCTION button
3	TAPE A Hbutton and indicator	wa	DISPLAY button
4	TAPE B hbutton and indicator	ws	TIMER SELECT indicator
5	TAPE B Hbutton and indicator	wd	. button
6	xbutton	wf	>button
7	CD indicator	wg	mbutton
8	SOUND MODE indicator	wh	Mbutton
9	SET UP MODE indicator	wj	GROOVE EX button
q; CINEMA SPACE button and indicator		wk	GROOVE button
qa V-GROOVE button and indicator		wl TAPE B Z button
qs	MODE SELECT button	e; DISC 1 to DISC 5 indicator
qd PUSH ENTER button/Multi stick		ea	TAPE A Z button
qf	TUNER/BAND button	es	REC PAUSE/START button
qg	ubutton	ed	HI-DUB button
qh	VOLUME knob	ef	CD SYNC button

qj Z1 to Z 5 buttons

qk DISC 1 to DISC 5 buttons

4

3Move the multi stick toward vor V repeatedly to set the hour.

4Move the multi stick toward B.

The minute indication flashes.

5Move the multi stick toward vor V repeatedly to set the minute.

6 Press PUSH ENTER.

To cancel the menu operation

Press MODE SELECT.

Tips

•Refer to the illustration to use the multi stick. Place your finger on the center of the multi stick and move in the direction you want (up/down or left/ right shown v/Vor b/B in this manual).

Up (v)

Left (b)	ENTER	Right (B)
	PUSH

Down (V)

• If you’ve made a mistake, start over from step 1.

5

To change the time

The previous explanation shows you how to set the time while the power is off. To change the time while the power is on, do the following:

	1	Press MODE SELECT repeatedly to select “Set	Getting
		Up Mode”, then press PUSH ENTER.
	2	Move the multi stick toward bor Brepeatedly
		to select “Timer Set Up ?”, then press PUSH
		ENTER.	Started
	3	Move the multi stick toward bor Brepeatedly

to select “Clock Set ?”, then press PUSH ENTER.

4 Perform steps 3 through 6 on the left.

Note

The clock settings are canceled when you disconnect the power cord or if a power failure occurs.

7

Step 1: Hooking up the system (continued)

To attach the front speaker pads

Attach the supplied front speaker pads to the bottom of the speakers to stabilize the speakers and prevent them from slipping.

Inserting two size AA (R6) batteries into the remote

e

E Ee

Step 2: Setting the time

You must set the time before using the timer functions.

The clock is on a 24-hour system for the European model, and on a 12-hour system for other models.

For illustration purposes, the 24-hour system model is used.

	?/1	2,3,4,5,6 1
	(Power)

Tip

With normal use, the batteries should last for about six months. When the remote no longer operates the system, replace both batteries with new ones.

Note

If you do not use the remote for a long period of time, remove the batteries to avoid possible damage from battery leakage.

When carrying this system

Do the following to protect the CD mechanism. Make sure that all discs are removed from the unit.

1Press FUNCTION repeatedly until “CD” appears in the display.

2Hold down V-GROOVE and press ?/1so that “LOCK” appears in the display.

1Press MODE SELECT when the system is turned off.

“Clock Set ?” appears.

When the system is in the Power Saving Mode, “Clock Set ?” will not appear. Either set Power Saving Mode off, or follow the steps on the following page (“To change the time”) after turning the power on.

2Press PUSH ENTER.

The hour indication flashes.

6

from extracted is section This .manual instruction

6

Items in “Sound Mode” and “Set Up Mode”

The numbers in parenthesis denotes the page number for the item.

Sound Mode

Effect OnpOff/OffpOn (33)

File Select (33)

P File Memory (37)

Equalizer Control (36)

*

Cinema Space (35)

Mode End

•To cancel the menu operation, press MODE SELECT.

•The items with asterisk (*) cannot be selected depending on the situation.

•The items in double box are not in the menu. In order to select the doublebox items, press the corresponding buttons on the front panel or on the remote.

•Select “Mode End” to finish the menu operation.

1)Cannot be selected during CD playback.

2)Cannot be selected during CD program playback.

Sony Corporation Printed in Malaysia

Set Up Mode

*

CD Set Up ?

Repeat Set Up ?

(22)

*

Play Mode Set Up ?

(12)

1)

CD Edit Start ?

(30)

2)

Program Set ?

(24, 27)

PGM Check Clear

(25, 29)

*

Mode End

*

TUNER Set Up ?

Stereo Mono ?

(15)

*

PTY Select ?

(38)

TUNER Memory ?

(8)

*

TUNER Erase ?

(9)

Mode End

TAPE Set Up ?

Direction Set Up ?

(13, 16, 18, 20)

DOLBY NR Set Up ?

(14, 17, 19)

Mode End

Timer Set Up ?

Clock Set ?

(6)

*

Timer Set ?

(41, 43)

*

Timer Select ?

(42, 44)

Mode End

Display Set Up ?

Spectrum Set Up ?

(34)

Dimmer Set Up ?

(34)

Mode End

Mode End

SECTION 2

DISASSEMBLY

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

1 three screws

2-1. CASE ×

(BVTT 3 8)

5 Remove the case

in the arrow direction.

4 three screws (case 3 TP2)

2 two screws (BVTT 3 × 8)

3 three screws (case 3 TP2)

2-2. FRONT PANEL SECTION

1 flat type wire (15core)

4 connector

(CN601)

(CN1691)

7 front panel section

5 connector (CN914)

3 flat type wire (11core) (CN503)

2 flat type wire (17core) (CN001)

6 three screws (BVTT 3 × 6)

7

2-3. TAPE MECHANISM DECK SECTION (TCM-230AWR12)

2 two screws (BVTP 3 × 8)

1 two screws (BVTP 3 × 8)

3 tape mechanism deck section (TCM-230AWR12)

2-4. BACK PANEL SECTION

2 connector (CN902)

qa three screws (BVTP 3 × 8)

3 connector (CN903)

4flat type wire (13core) (US) flat type wire (15core) (AEP) (CN502)

	1 connector	qs Remove the back panel section
		in the arrow direction.
	(CN901)
		0 two screws
		(BVTP 3 × 8)
		9 three screws
		(BVTP 3 × 8)
		8 screw
		(BVTP 3 × 8)
		7 four screws
		(BVTP 3 × 8)
		6 five screws
		(BVTP 3 × 8)
		5 screw
		(BVTP 3 × 8)
	claws

qd connector (CN941)

8

2-5. MAIN BOARD, FRONT AMP BOARD	0 two screws
	(BVTP 3 × 8)

8connector (CN801)

	qs two screws
	(BVTP 3 × 8)	qa heat sink
		9 two screws
		(BVTP 3 × 16)
		5 two connectors
		(CN803, CN804)
	qd Remove the FRONT AMP board	6 MAIN board
	in the arrow direction.

7connector (CN913)

3 flat type wire (19core)

	(CN523)
1 connector	4 two screws
	(BVTP 3 × 8)
(CN713)	2 flat type wire (17core)
	(CN522)

2-6. CD BASE UNIT (BU-K2BD38)

7 CD base unit (BU-K2BD38)

4 spring (insulator),

compression

6 spring (insulator),

compression

2 chassis

5 two screws

(PTPWH M 2.6)

3 two screws (PTPWH M 2.6)

1three screws (BVTP 3 × 6)

9

2-7. CD MECHANISM DECK SECTION (CDM53F-K2BD38)

3 chassis, sub

4 four screws (sumitite (B3), +BV)

5 CD mechanism deck section (CDM53F-K2BD38)

2 two screws (BVTT 3 × 6)

1 three screws (BVTT 3 × 6)

2-8. FITTING BASE (GUIDE) ASSY, BRACKET (CHASSIS) AND

FITTING BASE (MAGNET) ASSY

7 four screws (BVTP M2.6)

5 bracket

(chassis)

2 four screws (BVTP M2.6)

4 two screws
(BVTP M2.6)	6 connector

(CN710)

8 base (magnet) assy, fitting

4 three screws (BVTP M2.6)

3 base

(guide) assy, fitting

1two connectors (CN709, 715)

10

2-9. TRAY (SUB)

1 Rotating the pulley (LD), shift the slider (selection) in the arrow A direction.

2 Rotating the pulley (mode) in the arrow direction, adjust the tray (sub) to be removed. 3 Rotating the pulley (LD), shift the slider (selection) in the arrow B direction.

4 Rotating the pulley (mode) in the arrow direction, remove the tray (sub) to be removed.

slider (selection)

pulley (LD)

stocker

section

A

B

pulley (mode)

tray (sub)

2-10. CHASSIS (MOLD B) SECTION, STOCKER SECTION AND SLIDER (SELECTION)

Note : In mounting the parts, refer to page 12 and 13.

6 two screws (PTPWH M2.6)

5 stocker section

pulley (LD)

4 two step screws

7 slider (selection)

8 washer

9compression spring

1three screws (BVTP M2.6)

2 chassis (mold B) section Note: Rotating the pulley (LD),

shift the slider (selection) to the left.

4 two step screws

3 gear (eject)

11

2-11. GEARS INSTALLATION

3 gear (gear B)

portion A

Adjust the gear (gear B) with the portion A as shown.

1Slide the slider (U/D) fully in the arrow direction.

2 gear (U/D slider)

slider (U/D) gear

4 gear (gear A)

gear

linearly

(gear B)

Adjust the gear so that it meshes with the bottom tooth of slider (U/D)gear, as shown.

Adjust so as to be aligned with gear (B) linearly,as shown.

2-12. SLIDER (SELECTION) INSTALLATION

2 gear (chuking)

rotary encoder

Align with the slot of rotary encoder.

1 rotary encoder

6two screws (PTPWH M2.6)

5 washer

4 compression spring

7 Insert the slider (selection) into the portion A.

portion A

3 convex portion of slider (selection)

gear (chuking)

Insert a convex portion into a groove of gear (chuking).

align marking

12

2-13. STOCKER SECTION INSTALLATION

		2 portion A of tray (sub)
	1 stocker section	Hook the portion A of tray (sub)
		to the slider (selection).

potion A	sticking of
of tray (sub)	slider (selection)

3 two step screws

3 two step screws

2-14. CHASSIS (MOLD B) SECTION INSTALLATION

3 three screws (BVTP M2.6)

2 Insert the gear (eject)		1 Insert the portion A of
under the gear (LD
deceleration).	portion A	chassis (mold B) section
		into the portion B of
		slider (selection).

gear (LD deceleration)

portion B of slider (selection)

13

SECTION 3 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.Press three buttons x, DISPLAY , and DISC 5 simultaneously.

2.The fluorescent indicator tube displays “COLD RESET” and the set is reset.

[CD Ship Mode]

• This mode moves the pickup to the position durable to vibration. Use this mode when returning the set to the customer after repair.

Procedure:

1.Press ?/1 button to turn the set ON.

2.Press V-GROOVE button and ?/1 button simultaneously.

3.After the "STANDBY" display blinks six times, a message “LOCK” is displayed on the fluorescent indicator tube, and the CD ship mode is set.

[MC Hot Reset]

•This mode resets the set with the preset data kept stored in the memory. The hot reset mode functions same as if the power cord is plugged in and out.

Procedure:

1.Press three buttons x, DISPLAY , and DISC 1 simultaneously.

2.The fluorescent indicator tube becomes blank instantaneously, and the set is reset.

[CD Service Mode]

• This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the pickup.

Procedure:

1.Press ?/1 button to turn the set ON.

2.Select the function “CD”.

3.Press three buttons x , DISPLAY , and Z 3 simultaneously.

4.The CD service mode is selected.

5.With the CD in stop status, turn the shuttle knob clockwise to move the pickup to outside track, or turn the shuttle knob counter-clockwise to inside track.

6.To exit from this mode, perform as follows:

1)Move the pickup to the most inside track.

2)Press three buttons in the same manner as step 2.

Note: • Always move the pickup to most inside track when exiting from this mode. Otherwise, a disc will not be unloaded.

•Do not run the sled motor excessively, otherwise the gear can be chipped.

[VACS ON/OFF Mode]

•This mode is used to switch ON and OFF the VACS (Variable Attenuation Control System).

Procedure:

Press the ENTER and x buttons simultaneously. The message “VACS OFF” or “VACS ON” appears.

[Change-over of MW Tuner Step between 9 kHz and 10 kHz]

•A step of MW channels can be changed over between 9 kHz and 10 kHz.

Procedure:

1.Press ?/1 button to turn the set ON.

2.Select the function “TUNER”, and press TUNER/BAND button to select the BAND “MW”.

3.Press ?/1 button to turn the set OFF.

4.Press MODE SELECT and ?/1 buttons simultaneously, and the display of fluorescent indicator tube changes to “MW 9 k STEP” or “MW 10 k STEP”, and thus the channel step is changed over.

[GC Test Mode]

• This mode is used to check the software version, FL tube, LED, keyboard and VACS.

Procedure:

1.Press three buttons x, DISPLAY , and DISC 2 simultaneously.

2.LEDs and fluorescent indicator tube are all turned on.

3.When you want to enter the software version display mode, press DISC 1 . The model number and destination are displayed.

4.Each time DISC 1 is pressed, the display changes starting from MC version, GC version, VC version, CD version, CDM version, ST version, TC version, TA version, TM version and BR version in this order, and returns to the model number and destination display.

5.When DISC 3 is pressed while the version numbers are being displayed except model number and destination, year, month and day of the software creation appear. When DISC 3 is pressed again, the display returns to the software version display. When DISC 1 is pressed while year, month and day of the software creation are being displayed, the year, month and day of creation of the software versions are displayed in the same order of version display.

6.Press DISC 2 button, and the key check mode is activated.

7.In the key check mode, the fluorescent indicator tube displays “K 0 VO 0 STICK N”. Each time a button is pressed, “K 0” value increases. However, once a button is pressed, it is no longer taken into account.

“VO 0” value increases like 1, 2, 3 ... if rotating VOLUME knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “–” direction.

Moving the stick changes the “STICK N” display.

When moved up	: “STICK R”
When moved down	: “STICK r”
When moved to the left	: “STICK T”

When moved to the right : “STICK t”

8.Also when DISC 3 is pressed after lighting of all LEDs and FL tubes, value of VACS appears.

9.To exit from this mode, press three buttons in the same manner as step 1, or disconnect the power cord.

14

[MC Test Mode]

• This mode is used to check operations of the respective sections of Amplifier, Tuner, CD and Tape.

Procedure:

1.Press the ?/1 button to turn on the set.

2.Press the three buttons of x , DISPLAY and DISC 3 simultaneously.

3.A message “TEST MODE” appears on the FL display tube. 4 When f (STIC UP) button is pressed, GEQ increases to its

maximum and a message “GEQ MAX” appears.

5.When F (STIC DOWN) button is pressed, GEQ decreases to its minimum and a message “GEQ MIN” appears.

6.When g(STIC LEFT) or G(STIC RIGHT) button is pressed, GEQ is set to flat and a message “GEQ FLAT” appears.

7.When the VOLUME control knob is turned clockwise even slightly, the sound volume increases to its maximum and a message “VOLUME MAX” appears for two seconds, then the display returns to the original display.

8.When the VOLUME control knob is turned counter-clockwise even slightly, the sound volume decreases to its minimum and a message “VOLUME MIN” appears for two seconds, then the display returns to the original display.

9.In the test mode, the default-preset channel is called even when the TUNER is selected and an attempt is made to call the preset channel that has been stored in memory, by operating the Shuttle knob. (It means that the memory is cleared.)

10.When CD is selected and press MODE SELECT , and press ENTER when “Set up Mode” is displayed.

Press ENTER when “CD Set up?” is displayed.

Move the stick left and right to display “CD Edit Start?”, and press ENTER , the disc that is being chucked at this moment becomes the default setting. It means that the default disc only is accessed when any other discs are selected even though the display indication changes accordingly. At the same time, the Z1 to Z5 cannot be accepted. (It means that the tray motor and the turntable motor are disabled of their operation.)

11.When a tape is inserted in Deck B and recording is started, the input source function selects VIDEO automatically.

12.When x button is pressed to stop recording, the Tape (Deck) B is selected and tape is rewound using the j button, tape is rewound, tape is stops at around the record-starting position and playback of the recorded portion of the tape is started. If PAUSE is inserted even once during recording, tape is rewound to the position around the PAUSE position and is played back.

13.When the HI-DUB Button is press during playback of Deck B, either normal speed or high speed can be selected by this button.

14.Select the desired loop by pressing MODE SELECT , and press ENTER when “Set up Mode” is displayed.

Press ENTER when “CD Set up?” is displayed.

Move the stick left and right to display “Tape Set Up?”, and press ENTER .

Press ENTER when “Direction Set Up?” is displayed. Move the stick left and right to display “Cycle?”, and press ENTER .

Insert a test tape AMS-110A or AMS-RO to Deck A.

15.Press the CD SYNC button to enter the AMS test mode.

16.After a tape is rewound first, the FF AMS is checked, and the mechanism is shut off after detecting the AMS signal twice.

17.Then the REW AMS is checked and the mechanism is shut off after detecting the AMS signal twice.

18.When the check is complete, a message of either OK or NG appears.

19.When you want to exit this mode, press the ?/1 button twice. The cold reset is enforced at the same time.

15

[Aging Mode]

This mode can be used for operation check of CD section and tape deck section.

•If an error occurred:

The aging operation stops and display status.

•If no error occurs:

The aging operation continues repeatedly.

1. Operating method of Aging Mode

Turn on the main power and select “CD” of the function.

1)Set a disc in DISC1 tray. Select ALL DISC CONTINUE, and REPEAT OFF.

2)Load the tapes recording use into the decks A and B respectively.

3)	Press three buttons x ,	DISPLAY	, and	DISC 4	simultaneously.
4)	Aging operations of CD and tape are started at the same time.

• Tape Deck

1.The tape in deck A is rewound. “TAPE A AG-1” is displayed.

2.The FWD side of deck A is played for two minutes. “TAPE A AG-2” is displayed.

3.The tape in deck A is fast forwarded. “TAPE A AG-3” is displayed. Fast forward is carried out for 20 seconds or to the tape end.

4.The RVS side of deck A is played for two minutes. “TAPE A AG-4” is displayed.

5.The tape in deck A is rewound. “TAPE A AG-5” is displayed.

6.The FWD side of deck B is played for two minutes. “TAPE B AG-2” is displayed.

7.The tape in deck B is fast forwarded. “TAPE B AG-3” is displayed. Fast forward is carried out for 20 seconds or to the tape end.

8.The RVS side of deck B is played for two minutes. “TAPE B AG-4” is displayed.

9.The tape in deck A is rewound. “TAPE A AG-5” is displayed.

10.Repeated from step 2.

• CD

1.The tray rotates.

2.DISC 5 is chucked.

3.The TOC is read.

4.The first track is played for 3 seconds.

5.The last track is played for 3 seconds.

6.DISC 1 is open.

7.DISC 1 is close.

8.Repeated from step 2.

16

2. Correction of Errors [When due to tape deck]

Stopped while tape aging operation with the “ ” displayed state.

[When due to CD]

Press x , DISPLAY , and Z together to display the error code.

• Display of number of mechanism errors

Move the stick to the left and right to display “CDM Err Count *”.

*is the number of mechanism errors.

•Display of mechanism error

Move the stick to the left and right to display “CDM E**D##$$%%!!”.

Move the stick up and down to send the error number.

**: Error number 00 is the latest error.

The larger the number, the older will the error be. (Maximum 9)

##: FF is the mechanism error after mechanism initialization ends.

$$ : Judge from the first digit of the error number. (Don’t care the second digit.)

When the error number is 1 or 2, it indicates mechanism error in tray loading between the stocker position and behind it.

%% : Judge from the first digit of the error number. (Don’t care the second digit.)

When the error number is 2, it indicates mechanism error in the up/down movements of the stocker.

!!: Judge from the first digit of the error number. (Don’t care the second digit.)

When the error number is 2, it indicates mechanism error during switching of the clamper and mode.

• No DISC error display

Move the stick left and right to display “No Disc Count *”.

*means the number of no discs.

•No DISC error display

Move the stick left and right to display “No E**D##$$%%00”.

Move the stick up and down to send the error number.

**: Error number 01 is the latest error.

The larger the number, the older will the error be. (Maximum 3)

##: 01 .... FOCUS ERROR 02 .... GFS ERROR 03 .... SET UP ERROR

$$ : 00 .... Judged as No DISC without attempting chucking retry

02 .... Judged as No DISC after chucking retry

%%: Judged with the first digit of the error number in the state where No DISC has been determined. (Don’t care the second digit.)

1 ...... STOP

2 ...... SET UP

3 ...... TOC Read

4 ...... Access

5 ...... PLAY

6 ...... PAUSE

7 ...... Manual Search (during PLAY)

8 ...... Manual Search (during PAUSE)

3.Ending the Aging Mode

1)End the Aging Mode with the power off.

2)To reset the CD error history, be sure to perform cold reset.

17

SECTION 4

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

	Mode	Torque meter	Meter reading
			3.04 – 6.96 N • m
	FWD	CQ-102C	(31 to 71 g • cm)
			(0.43 – 0.98 oz • inch)
	FWD		0.20 – 0.58 N • m
		CQ-102C	(2 to 6 g • cm)
	back tension
			(0.02 – 0.08 oz • inch)
			3.04 – 6.96 N • m
	REV	CQ-102RC	(31 to 71 g • cm)
			(0.43 – 0.98 oz • inch)
	REV		0.20 – 0.58 N • m
		CQ-102RC	(2 to 6 g • cm)
	back tension
			(0.02 – 0.08 oz • inch)
			6.97 – 14.02 N • m
	FF/REW	CQ-201B	(71 to 143 g • cm)
			(0.98 – 1.99 oz • inch)
			0.98 N • m or more
	FWD tension	CQ-403A	(100 g or more)
			(3.53 oz or more)
			0.98 N • m or more
	REV tension	CQ-403R	(100 g or more)
			(3.53 oz or more)

SECTION 5

ELECTRICAL ADJUSTMENTS

DECK SECTION		0 dB=0.775V

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

2.Do not use a magnetized screwdriver for the adjustments.

3.After the adjustments, apply suitable locking compound to the parts adjusted.

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.

Tape	Signal	Used for
P-4-A100	10 kHz, –10 dB	Azimuth Adjustment
WS-48B	3 kHz, 0 dB	Tape Speed Adjustment
P-4-L300	315 Hz, 0 dB	Level Adjustment

Record/Playback Head Azimuth Adjustment

(Deck A, Deck B)

Note: Perform this adjustments for both decks.

Procedure:

1. Mode : Playback

test tape
P-4-A100	main board
(10kHz, –10dB)	CN301		level meter
	Pin 1	(R-ch)
	Pin 3	(L-ch)
set			+
			–

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 1 dB of peak.

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

18

3. Mode: Playback

test tape P-4-A100 (10kHz, –10dB)

main board
CN301
Pin 3 (L-ch)	oscilloscope
Pin 2 (GND)
L
set
R
Pin 1 (R-ch)

Waveform of oscilloscope

in phase	45°	90°	135°	180°
	good			wrong

4.After the adjustments, apply suitable locking compound to the parts adjusted.

Adjustment Location: Playback Head (Deck A)

Record/Playback/Erase Head (Deck B)

Reverse Foward

Tape Speed Adjustment (Deck A)

Note: Set the test mode using the following method and begin tape speed adjustment.

In the test mode, the speed will switch to double speed or normal speed each time the HI-SPEED DUB button is pressed.

Procedure:

With the power turned ON, press the x button, DISPLAY button, and DISC 3 button simultaneously.

(The “VOLUME” on the fluorescent display tube will blink while in the test mode.)

To exit the test mode, press the "/1 button.

1.Insert the WS-48B into deck B.

2.Press the H button of deck B.

3.Press the HI-DUB button and play the tape at double speed.

4.Adjust RV1001 of the LEAF SW board so that the reading of the frequency counter becomes 6000 ± 180 Hz.

5.Press the HI-DUB button and play the tape at normal speed.

6.Adjust RV1002 of the LEAF SW board so that the reading of the frequency counter becomes 3000 ± 90 Hz.

Adjustment Location: LEAF SW board

Sample Value of Wow and flutter

W.RMS (JIS) less than 0.3% (test tape: WS-48B)

Playback Level Adjustment (Deck A, Deck B)

Procedure:

Mode: Playback

test tape P-4-L300 (315Hz, 0dB)

level meter

set

main board

CN301

Pin 1 (R-ch)

Pin 3 (L-ch)

Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301 (L-CH) and RV401 (R-CH)

so that adjustment within the following adjustment level.

Adjustment level:

CN301 playback level: 301.5 to 338.3 mV (–8.2 to –7.2 dB) level difference between the channels: within ± 0.5 dB

Adjustment Location: AUDIO board

Adjustment Location

[LEAF SW BOARD]

RV1001(High Speed)

RV1002(Normal Speed)

RV1002 RV1001

19

Record Bias Adjustment (Deck B)

Procedure:

INTRODUCTION

When set to the test mode performed in Tape Speed Adjustment, when the tape is rewound after recording, the “REC memory mode” which rewinds only the recorded portion and playback is set.

This “REC memory mode” is convenient for performing this adjustment. During recording, the input signal FUNCTION will automatically switch to VIDEO.

(After recording, press the m button without stopping will return to the position where recording was started.)

1.Press FUNCTION button to select VIDEO. (This step is not necessary if the above test mode has already been set.)

2.Insert a tape into deck B, press the REC PAUSE/START button, and then press the H button to start recording.

3.Mode: Record

VIDEO (AUDIO) IN

1)315 Hz } 50 mV (–23.8 dB)

2)10 kHz

AF OSC	blank tape
600 Ω	CS-123
attenuator
	set

4. Mode: Playback

recorded	level meter
position

set

main board

CN301

Pin 1 (R-ch)

Pin 3 (L-ch)

5.Confirm playback the signal recorded in step 2 become adjustment level as follows.

If these levels do not adjustment level, adjust the RV341 (L-CH) and RV441 (R-CH) on the AUDIO board to repeat steps 3 and 4.

Adjustment level: The playback output of 10 kHz level difference against 315 Hz reference should be ± 1.0 dB.

Adjustment Location: AUDIO board

Record Level Adjustment (Deck B)

Procedure:

INTRODUCTION

When set to the test mode performed in Tape Speed Adjustment, when the tape is rewound after recording, the “REC memory mode” which rewinds only the recorded portion and playback is set.

This “REC memory mode” is convenient for performing this adjustment. During recording, the input signal FUNCTION will automatically switch to VIDEO.

(After recording, press the m button without stopping will return to the position where recording was started.)

1.Press FUNCTION button to select VIDEO. (This step is not necessary if the above test mode has already been set.)

2.Insert a tape into deck B, press the REC PAUSE/START button, and then press the H button to start recording.

3.Mode: Record

VIDEO (AUDIO) IN 315Hz 50 mV (–23.8 dB)

AF OSC	blank tape
600 Ω	CS-123
attenuator
	set

4. Mode: Playback

recorded		level meter
position
	set
	main board
	CN301
	Pin 1	(R-ch)
	Pin 3	(L-ch)

5.Confirm playback the signal recorded in step 2 become adjustment level as follows.

If these levels do not adjustment level, adjust the RV301 (L-CH) and RV351 (R-CH) on the MAIN board to repeat steps 3 and 4.

Adjustment level:

CN301 playback level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)

Adjustment Location: MAIN board

	Adjustment Location:			[MAIN BOARD]
	[AUDIO BOARD]				RV301
				CN301 3
					1
					Record Level (L ch)
	RV341(Lch),RV441(Rch)	RV311(Lch),RV411(Rch)		RV351	IC301
	Record Bias	Playback Level (Deck A)
				Record Level (R ch)
	RV301 RV401
	RV441 RV341	RV311	RV411

RV301(Lch),RV401(Rch)

Playback Level (Deck B)

20

CD SECTION

Note :

1.CD Block is basically designed 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

BD board

TP(FEO)

TP(VC)

Procedure :

1.Connect oscilloscope to TP (FEO).

2.Connect between TP (FEI) and TP (VC) by lead wire.

3.Connect between TP (AGCCON) and TP (GND) by lead wire.

4.Turn Power switch on.

5.Load a disc (YEDS-18) and actuate the focus search. (In consequence of open and close the disc tray, actuate the focus search)

6.Confirm that the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 4 ±1 Vp-p.

S-curve waveform

symmetry

A

within 4 ±1Vp-p

B

7. After check, remove the lead wire connected in step 2 and 3.

Note : • Try to measure several times to make sure than the ratio 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.

RF Level Check

oscilloscope

BD board

TP(RF)

TP(VC)

Procedure :

1.Connect oscilloscope to TP (RF).

2.Connect between TP (AGCCON) and TP (GND) by lead wire.

3.Turned Power switch on.

4.Load a disc (YEDS-18) and playback.

5.Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.

6.After check, remove the lead wire connected in step 2.

Note: Clear RF signal waveform means that the shape “◊” can be clearly distinguished at the center of the waveform.

RF signal waveform

VOLT/DIV : 200mV

TIME/DIV : 500ns

level : 1.45 ± 0.3Vp-p

E-F Balance (1 Track jump) Check

	oscilloscope
BD board
TP (TEO)	+
TP (VC)	–

Procedure:

1. Connect oscilloscope to TP (TEO) and TP (VC) board. 2. Turned Power switch on.

3. Load a disc (YEDS-18) and playback the number five track. 4. Press the u button. (Becomes the 1track jump mode.)

5. Confirm that the level B and A (DC voltage) on the oscilloscope waveform.

1 track jump waveform

Center of waveform

	B
0V	A (DC voltage)
level=1.3±0.6Vp-p	Symmetry

Specification level: AB x 100=less than ±22%

6. After check, remove the lead wire connected in step 1.

RF PLL Free-run Frequency

Procedure :

1. Connect frequency counter to test point (XPCK) with lead wire.

BD board	frequency counter
TP (XPCK)	+
	–

2.Turned Power switch on.

3.Put the disc (YEDS-18) in to play the number five track. Confirm that reading on frequency counter is 4.3218MHz.

21

Adjustment Location:

[BD BOARD] (Conductor Side)

		TP		TP
				(XPCK)
		(AGCCON)
12
		1	21	20
TP
	IC103
(TEO)		24
				1
TP		40
			IC101
(FEO)		41		80
		TP
TP		(FEI)	60	61
(VC)
	TP
	(RF)			TP
			(DGND)

22

SECTION 6 DIAGRAMS

6-1. CIRCUIT BOARDS LOCATION

TRANS board

PANEL board

SUB PANEL board

HP board

LEAF SW board

CD SW board

SUB TRANS board

CLAMP MOTOR board

SENSOR 2 board

SENSOR board

OUT SW board

INT/COUNT SW board

MAIN board

FRONT AMP board

AUDIO board

TUNER UNIT

BD board

IN SW board

CONNECTOR board

LOAD MOTOR board

HCD-ZX10

THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.

(In addition to this, the necessary note is printed in each block.)

For schematic diagrams.

Note:

•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.

•2: nonflammable resistor.

•1: fusible resistor.

•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 and waveforms are dc with respect to ground under no-signal (detuned) conditions.

•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 : FM

g : VIDEO/MD (AUDIO) E : PB (DECK A)

d : PB (DECK B)

G : REC (DECK B) m : CHROMA n : Y

o: VIDEO J : CD

c : digital out

I : PHONO

•Abbreviation

CND : Canadian model.

For printed wiring boards.

Note:

•X: parts extracted from the component side.

•Y: parts extracted from the conductor side.

•a : Through hole.

•b: Pattern from the side which enables seeing.

(The other layers' patterns are not indicated.)

Caution:

Pattern face side: Parts on the pattern face side seen from the (Side B) pattern face are indicated.

Parts face side: Parts on the parts face side seen from the (Side A) parts face are indicated.

• Indication of transistor

B C E

These are omitted.

B C E

These are omitted.

C

			Q							These are omitted.

B E

23 23