Sony HCDZX-6 Service manual

HCD-ZX6/ZX8

SERVICE MANUAL

Ver. 1.3 2005. 09

• HCD-ZX6/ZX8 are the tuner, deck, CD and amplifier section in FST-ZX6/ZX8, LBT-ZX6/ZX8.

AUDIO POWER SPECIFICATION (US model only)

POWER OUTPUT AND TOTAL HARMONIC DISTORTION: With 4-ohm loads, both channels driven, from 120 Hz – 10 kHz; rates 270 watts per channel (HCDZX6) or 140 watts par channel (HCD-ZX8) minimum RMS power, with no more than 10 % total harmonic distortion from 250 milliwatts to rated output.

(Photo: HCD-ZX8)

CD CD Mechanism Type CDM79B-F1BD81 Section Base Unit Name BU-F1BD81A

TAPE Model Name Using Similar Machanism HCD-GN880 Section Tape Mechanism T ype CWM43RR35

US Model

E Model

Model Name Using Similar Mechanism NEW

Optical Pick-up Name KSM-215DCP/C2RP

(HCD-ZX8: US model only)

Continuous RMS power output (reference):

180 × 2 + 180 × 2 watts (6 ohms at 1 kHz, 10% THD)

Amplifier section

HCD-ZX8 Mexican models:

The following measured at AC 127 V, 60 Hz DIN power output (rated):

140 × 2 + 140 × 2 watts (6 ohms at 1 kHz, DIN)

Continuous RMS power output (reference):

180 × 2 + 180 × 2 watts (6 ohms at 1 kHz, 10% THD)

Other models:

The following measured at AC 120, 220, 240 V, 50/60 Hz DIN power output (rated):

140 × 2 + 140 × 2 watts (6 ohms at 1 kHz, DIN)

Continuous RMS power output (reference):

180 × 2 + 180 × 2 watts (6 ohms at 1 kHz, 10% THD)

SPECIFICATIONS

HCD-ZX6 Mexican models:

The following measured at AC 127 V, 60 Hz DIN power output (rated):

220 + 220 watts (4 ohms at 1 kHz, DIN)

Continuous RMS power output (reference):

280 + 280 watts (4 ohms at 1 kHz, 10% THD)

Other models:

The following measured at AC 120, 220, 240 V, 50/60 Hz DIN power output (rated):

220 + 220 watts (4 ohms at 1 kHz, DIN)

Continuous RMS power output (reference):

280 + 280 watts (4 ohms at 1 kHz, 10% THD)

– Continued on next page –

9-879-083-04

COMPONENT Hi-Fi STEREO SYSTEM

Sony Corporation

Audio Group Published by Sony Engineering Corporation

HCD-ZX6/ZX8

Ver. 1.3

Inputs PHONO IN (phono jack):

sensitivity 3 mV, impedance 47 kOhms

MIC (phone jack): sensitivity 1 mV,

impedance 10 kOhms

GAME INPUT AUDIO L/R (phono jacks):

sensitivity 250 mV, impedance 47 kOhms

GAME INPUT VIDEO (phono jack):

1 Vp-p, 75ohms

VIDEO/MD IN L/R (phono jacks):

sensitivity 250 mV/450 mV,

impedance 47 kOhms Outputs PHONES (stereo phone jack):

accepts headphones of

8 ohms or more VIDEO/MD OUT L/R (phono jacks):

voltage 250 mV,

impedance 1 kOhm VIDEO OUT (phono jack):

max. output level 1 Vp-p,

load impedance 75 ohms FRONT SPEAKER: HCD-ZX8: FRONT L/R Use only the supplied

speaker SS-ZX8 SURROUND L/R Use only the supplied

speaker SS-ZX8 HCD-ZX6/LBT-ZX6: FRONT L/R Use only the supplied

speaker SS-ZX6

CD/MP3 player section

System Compact disc and digital

audio system Laser Semiconductor laser

(λ=780 nm)

Emission duration:

continuous Laser Output Max. 44.6 µW*

* 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. Frequency response 2 Hz – 20 kHz (±0.5 dB) Wave length 780 – 790 nm Signal-to-noise-ratio More than 90 dB Dynamic range More than 90 dB OPTICAL CD DIGITAL OUT (Square optical connector jack, rear panel) Wave length 660 nm Output level –18 dBm

General

Power requirements US model: 120 V AC, 60 Hz Mexican models: 127 V, 60 Hz Other models: 120 V, 220 V or

230 – 240 V AC, 50/60 Hz Adjustable with voltage selector

Power consumption HCD-ZX8: 330 watts HCD-ZX6: 240 watts Dimensions (w/h/d) (Main Unit)

Approx. 362 × 437 × 465 mm

Mass (Main Unit) HCD-ZX8: Approx. 19.0 kg HCD-ZX6: Approx. 18.0 kg

Supplied accessories: AM loop antenna (1)

FM lead antenna (1) Remote Commander (1) Batteries (2) Speaker cords:

• HCD-ZX6 only 2m (2)

• HCD-ZX8 only –grey (10m) (2) –white (3m) (2)

Speaker pads:

• HCD-ZX6 only (8)

• HCD-ZX8 only (16)

Design and specifications are subject to change without notice.

Tape deck section

Recording system 4-track 2-channel, stereo Frequency response 50 – 13,000 Hz (±3 dB),

using Sony TYPE I tapes

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range 87.5 – 108.0 MHz

(50 kHz step) Antenna FM lead antenna Antenna terminals 75 ohms unbalanced Intermediate frequency 10.7 MHz

AM tuner section

Tuning range Latin American models: 530 – 1,710 kHz

(with the tuning interval

set at 10 kHz)

531 – 1,710 kHz

(with the tuning interval

set at 9 kHz) Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz

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 P ARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

HCD-ZX6/ZX8

Ver. 1.2

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 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.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the lead free mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher than

ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350 °C. Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscou-s (sticky , less prone to flo w) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder.

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

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

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 claassified as a CLASS 1 LASER product. This label is located on the rear exterior.

SAFETY CHECK-OUT (US MODEL)

After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for A C leakage. Check leakage as described below.

LEAKAGE TEST

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 microamperes). 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 V OM or battery-operated A C v oltmeter. 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

The laser diode in the optical pick-up block may suffer electrostatic breakdown 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.

0.15µF

1.5k

Ω

Earth Ground

AC voltmeter (0.75V)

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

HCD-ZX6/ZX8

Ver. 1.3

MODEL IDENTIFICATION

– BACK PANEL –

Part No.

MODEL PARTS No.

ZX8: MX 2-023-457-3s ZX6: US 2-649-004-0s ZX8: US 2-649-004-1s ZX6: E2 4-252-689-0s ZX8: E51 4-252-689-1s ZX6: E51 4-252-689-2s ZX8: E2 4-252-689-3s

PLAYABLE DISC

You can playback the following discs on this system. The other discs cannot be played back.

List of playable discs

Format of discs

Audio CDs Audio

CD-R/CD-RW Audio (Audio CDs)

CD-R/CD-RW Audio (Discs with MP3 audio tracks)

Disc logo Contents

• Abbreviation E2 : 120 V AC area in E model E51 : 220 V AC area in E model MX : Mexican model

HCD-ZX6/ZX8

1. SERVICE NOTE

1-1. Service Position of CD BU Block....................................... 6

1-2. Service Position of TC Mechanism, Panel Board ............... 7

1-3. Service Position of Power Board ........................................ 8

1-4. Service Position of CD Changer ......................................... 8

2. GENERAL

List of Button Locations and Reference Pages........................ 9

3. DISASSEMBLY

3-1. Case ................................................................................... 13

3-2. Loading Panel.................................................................... 13

3-3. Front Panel Section ...........................................................14

3-4. Tape Mechanism ............................................................... 14

3-5. Game-in/hp Board, Mic Board.......................................... 15

3-6. Back Panel Section............................................................ 15

3-7. CD Mechanism Section..................................................... 16

3-8. Main Board ....................................................................... 17

3-9. Table Assy ......................................................................... 17

3-10. SE-130 Board .................................................................... 18

3-11. TD Belt .............................................................................. 18

3-12. DC Motor (M901) ............................................................. 19

3-13. Optical Pick-up ................................................................. 19

3-14. BD81A Board ................................................................... 20

4. TEST MODE .....................................................................21

5. MECHANICAL ADJUSTMENTS............................... 25

6. ELECTRICAL ADJUSTMENTS................................. 25

7. DIAGRAMS

7-1. Circuit Boards Location .................................................... 29

7-2. Note for Printed Wiring Boards

and Schematic Diagrams .................................................. 29

7-3. Waveforms......................................................................... 29

7-4. Printed Wiring Board –BD Section– ................................. 30

7-5. Schematic Diagram –BD Section–.................................... 31

7-6. Printed Wiring Boards –Loading Section– ....................... 32

7-7. Schematic Diagram –Loading Section–............................33

7-8. Schematic Diagram –Main Section (1/4)– ........................ 34

7-9. Schematic Diagram –Main Section (2/4)– ........................ 35

7-10. Schematic Diagram –Main Section (3/4)– ........................ 36

7-11. Schematic Diagram –Main Section (4/4)– ........................ 37

7-12. Printed Wiring Board –Main Section– .............................. 38

7-13. Printed Wiring Boards –Power Section–........................... 39

7-14. Schematic Diagram –Power Section (1/2)– ...................... 40

7-15. Schematic Diagram –Power Section (2/2)– ...................... 41

7-16. Printed Wiring Board –Panel Section–.............................. 42

7-17. Schematic Diagram –Panel Section– ................................43

7-18. Printed Wiring Boards –Volume Section– ........................ 44

7-19. Printed Wiring Board –Mic Section– ................................ 45

7-20. Schematic Diagram –Volume, Mic Section– ....................46

7-21. Schematic Diagram –Switch Section– .............................. 47

7-22. Printed Wiring Boards –Switch Section (1/2)–................. 48

7-23. Printed Wiring Boards –Switch Section (2/2)–................. 49

7-24. Printed Wiring Boards –Jack Section–..............................50

7-25. Schematic Diagram –Jack Section– .................................. 51

7-26. Printed Wiring Board –Surround Section– ....................... 52

7-27. Schematic Diagram –Surround Section– ..........................53

7-28. Printed Wiring Boards –Transformer Section– ................. 54

7-29. Schematic Diagram –Transformer Section– ..................... 55

7-30. IC Block Diagrams............................................................ 56

7-31. IC Pin Descriptions ...........................................................57

8. EXPLODED VIEWS

8-1. Back Panel Section............................................................ 65

8-2. Front Panel Section (1)...................................................... 66

8-3. Front Panel Section (2)...................................................... 67

8-4. Chassis Section ................................................................. 68

8-5. CD Mechanism Section (1) ............................................... 69

8-6. CD Mechanism Section (2) ............................................... 70

9. ELECTRICAL PARTS LIST ........................................71

HCD-ZX6/ZX8

1-1. SERVICE POSITION OF CD BU BLOCK

SECTION 1

SERVICE NOTE

chassis

CD block

1-2. SERVICE POSITION OF TC MECHANISM, PANEL BOARD

gear (shaft)

loading panel

HCD-ZX6/ZX8

Turn the gear (shaft) in the

direction of the arrow.

PANEL board

tape mechanism bloc

HCD-ZX6/ZX8

1-3. SERVICE POSITION OF POWER BOARD

front panel assy CD mechanism bloc

POWER board

1-4. SERVICE POSITION OF CD CHANGER

CD mechanism block

SECTION 2

GENERAL

HCD-ZX6/ZX8

This section is extracted from instruction manual.

HCD-ZX6/ZX8

Note : Disassemble the unit in the order as shown below.

SET

SECTION 3

DISASSEMBLY

3-1. CASE

(Page 13)

3-2. LOADING PANEL

(Page 13)

3-3. FRONT PANEL SECTION

(Page 14)

3-6. BACK PANEL SECTION

(Page 15)

3-7. CD MECHANISM SECTION

(Page 16)

3-9. TABLE ASSY

(Page 17)

3-13. OPTICAL PICK-UP

(Page 19)

3-14. BD81A BOARD

(Page 20)

3-4. TAPE MECHANISM

(Page 14)

3-8. MAIN BOARD

(Page 17)

3-5. GAME-IN/HP BOARD,

MIC BOARD (Page 15)

3-10. SE-130 BOARD

(Page 18)

3-11. TD BELT

(Page 18)

3-12. DC MOTOR (M901)

(Page 19)

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

3-1. CASE

HCD-ZX6/ZX8

case

three

(case 3 TP2)

case (top)

screws

three claws

four

three

(case 3 TP2)

three

screws

BVTP3 x 8

screws

BVTP3 x 8

screws

)

3-2. LOADING PANEL

gear (shaft)

loading panel

Turn the gear (shaft) in the

direction of the arrow.

HCD-ZX6/ZX8

3-3. FRONT PANEL SECTION

CN920 (3P)

front panel section

connector (3P)

CN507 (21P)

CN104 (13P)

screw (+

lug

BVTP3 x 8

)

MAIN board

two hooks

three

screws

BVTP3 x 8

3-4. TAPE MECHANISM

)

two

screws

BVTP3 x 8

dust sheet

two holes

CN801 (4P)

CN803 (3P)

CN802 (2P)

connector (6P)

three

screws

BVTP3 x 8

)

tape mechanism

three

BVTP2.6 x 8

screws

)

two

screws

BVTP2.6 x 8

)

lid (TC)

lug

3-5. GAME-IN/HP BOARD, MIC BOARD

)

two clips

knob (MIC)

bracket (MIC)

bracket (game)

four

screws

BVTP2.6 x 8

MIC board

screw (+

BVTP2.6 x 8

HCD-ZX6/ZX8

)

two

screws

BVTP2.6 x 8

GAME-IN/HP board

)

clip

)

four

screws

BVTP2.6 x 8

)

3-6. BACK PANEL SECTION

CN1004 (4P)

CN1000 (3P)

two

screws

BVTP3 x 8

two

screws

BVTP2.6 x 8

two

two lugs

screws

BVTP3 x 8

two

BVTP3 x 8

two

screws

BVTP3 x 8

three

four

two

BVTP3 x 8

three

BVTP3 x 8

)

screws

BVTP3 x 8

screws

BVTP3 x 8

screws

)

bracket (center)

CN1002 (2P)

CN504 (11P)

)

CN513 (3P)

back panel section

HCD-ZX6/ZX8

3-7. CD MECHANISM SECTION

three

screws

BVTP3 x 8

CN509 (11P)

)

CN501 (27P)

two

BVTP3 x 8

chassis section

screws

)

two

screws

BVTP3 x 8

two

screws

BVTP3 x 8

two

screws

BVTP3 x 8

)

CD mechanism sectio

3-8. MAIN BOARD

)

CN502 (4P)

CN602

CN601

two

HCD-ZX6/ZX8

MAIN boar

screws

BVTP3 x 8

)

3-9. TABLE ASSY

table assy

CN509 (11P)

floating screw (+PTPWH M2.6)

screw

BTP2.6 x 8

tray

)

CN501 (27P)

CN002 (6P

two

screws

BTP2.6 x 8

bracket

claw

screw

BTP2.6 x 8

)

plate (guide)

HCD-ZX6/ZX8

3-10. SE-130 BOARD

CN102 (2P)

SE-130 board

two

screws

BTP2.6 x 8

)

CN101 (6P)

cla

3-11. TD BELT

two

P3 x 3

screws

)

TD unit assy

TD belt

two

screws

BTP2.6 x 8

claw

)

TD motor assy

table assy

3-12. DC MOTOR (M901)

CN004 (2P)

DC motor (M901)

HCD-ZX6/ZX8

3-13. OPTICAL PICK-UP

two

P2.6 x 4

screws

belt (loading)

gear (loading A)

)

screw

PTPWH M2.6

)

holder (BU) assy

two coil spring (insulating)

two

stopper (BU)

two

BVTP2.6 x 8

screws

)

CN201 (27P)

chassis plate

two

BVTP3 x 8

optical pick-up

two coil spring (insulating)

two floating

PTPWHM2.6)

screws

)

HCD-ZX6/ZX8

)

3-14. BD81A BOARD

BD81A board

CN101 (16P

gap tube

Remove soldering from the four points.

screw

BVTP2.6 x 8

)

SECTION 4

TEST MODE

HCD-ZX6/ZX8

[GC TEST MODE]

• This mode is used to check the fluorescent indicator tube, LED,

model, destination, software version, volume, ke y , jog and VACS level.

Procedure:

1. Press x (TAPE B) button, [TUNER ENTER] button and [DISC

2] button simultaneously.

2. All LEDs and segments in fluorescent indicator tube are lighted

up.

3. When you want to enter the software version display mode,

press [DISC 1] button. The model and destination are displayed.

4. Each time [DISC 1] button is pressed, the display changes from

MC version, GC version, CD version, CDDM version, CDMA version, CDMB version, BDA version, BDB version, ST version, TC version, T A v ersion, TM version in this order , and returns to the MC version display.

5. When [DISC 3] button is pressed while the version numbers are

being displayed except model and destination, the date of the software creation appear. When [DISC 3] button is pressed again, the display returns to the software version display . When [DISC 1] button is pressed while the date of the software creation is being displayed, the date of the software creation is displayed in the same order of software version display.

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

7. In the key check mode, the fluorescent indicator tube displays

“K0 J0 V0”. Each time a button is pressed , “K” value increases. However, once a button has been pressed, it is no longer taken into account. “J” value increases in the manner of 0, 1, 2, 3 ... if [JOG] is turned clockwise, or it decreases in the manner of 0, 9, 8, 7 ... if [JOG] knob is turned counter-clockwise. (only for HCD-ZX8) “V” value increases in the manner of 0, 1, 2, 3 ... if [VOLUME] knob is turned clockwise, or it decreases in the manner of 0, 9, 8, 7 ... if [VOLUME] knob is turned counter-clockwise.

8. When [DISC 3] button is pressed after all LEDs and se gments in

fluorescent indicator tube light up, the fluorescent indicator tube displays “VACS A APBB”. A is VACS lev el which is trigger by signal level while BB is VACS level which is trigger by APVACS (Abuse Protection VACS).

9. When [EX-CHANGE] button is pressed after all LEDs and

segments in fluorescent indicator tube light up, alternate segments in fluorescent indicator tube would light up. If you press [EX-CHANGE] button again, another half of altemate segments in fluorescent indicator tube would light up. Pressing [EX-CHANGE] button ag ain would cause all segments lights up.

10. To release from this mode, press three buttons in the same

manner as step 1, or disconnect the power cord.

[MC TEST MODE]

•This mode is used to check operations of the respective sections

of Amplifier, Tuner , and Tape.

3. When b button or B button is pressed, GEQ is set to flat and a message “GEQ FLAT” appears on the fluorescent indicator tube.

4. When the [VOLUME] knob is turned clockwise even slightly, the sound volume increases to its maximum and a message “VOLUME MAX” appears on the fluorescent indicator tube.

5. When the [VOLUME] knob is turned counter-clockwise even slightly, the sound volume decreases to its minimum and a message “VOLUME MIN” appears on the fluorescent indicator tube.

•Tape function

1. When a tape is inserted in Deck B and recording is started, the function is changed to VIDEO automatically . When [CD SYNC] button is pressed during recording in function, ALC (Automatic Logic Control) is turned on.

2. During recording, press . m (TAPE B) button will stop the recording and the function is changed to T APE B and re wind the tape in Deck B until the recording start position and playback of the tape B is started. If the [REC PAUSE/START] button is pressed for a pause and pressed again to resume recording during recording time, when the tape is rewind, the tape will be rewind until the position where the pause is applied.

• AMS Test Mode

1. Select the function “TAPE A” or “TAPE B”.

2. Select Loop or Relay direction mode by pressing the [DIRECTION] button. Insert a test tape AMS-110A or AMS-120 to selected tape deck.

3. Press the [AMP MENU] button to enter the AMS test mode.

4. After the test tape is rewind to the beginning of the tape, the AMS+ is checked, and the mechanism is shut off after detecting the AMS signal twice.

5. Then the AMS– is checked and the mechanism is shut of f after detecting the AMS signal twice.

6. When the check is complete, a message of either OK or NG appears on the fluorescent indicator tube.

•To release from MC Test mode

1. To release from this mode, press ?/1 button.

2. The cold reset is enforced at the same time.

[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 x (TAPE B) button, [TUNER ENTER] button, and ?/1 button simultaneously.

2. The fluorescent indicator tube becomes blank for a while, and the set is reset.

Procedure:

•To enter MC Test Mode

1. Press x (TAPE B) button, [TUNER ENTER] button and [DISC 3] button simultaneously.

2. The 4 speaker symbols and CD ring indicators flash on the fluorescent indicator tube. The function is changed to VIDEO.

• Check of Amplifier

1. When v button is pressed, GEQ increases to its maximum and a message “GEQ MAX” appears on the fluorescent indicator tube.

2. When V button is pressed, GEQ decreases to its minimum and a message “GEQ MIN” appears on the fluorescent indicator tube.

[VACS ON/OFF]

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

Procedure:

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

2. Press [PLAY MODE] button and ?/1 button simultaneously.

The message “VACS OFF” or “VACS ON” appears on the fluorescent indicator tube.

HCD-ZX6/ZX8

START

(from Disc 1)

TOC Reading

Play first track for 2

seconds

Play last track for 2

seconds

EX-CHANGE open/

Open the disc tray

Disc skip

Close the disc tray

Change the next disc

Disc Chucking

[TUNER STEP CHANGE]

•The step interval of AM channels can be toggled between 9 kHz and 10 kHz.

Procedure:

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

2. Press [TUNER BAND] button to select the “AM”.

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

4. Press [TUNER ENTER] button and ?/1 button simultaneously.

The system will turn ON automatically. The message “AM 9k STEP” or “AM 10k STEP” appears on the fluorescent indicator tube and thus the channel step is changed.

[CD SERVICE MODE]

•This mode let you move the CD sled motor freely . Use this mode when you want to clean the optical pick-up.

Procedure:

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

2. Select CD function.

3. Press x (T APE B) button, [TUNER ENTER] button, and [DISC

5] button simultaneously.

4. The CD service mode is activated. The message “SERVICE

MODE” appears on the fluorescent indicator tube.

5. With the CD in stop status, press M (CD) b utton to move the

optical pick-up to outside track, or press m (CD) button to move to inside track. The message “SLED OUT” or “SLED IN” appears on the fluorescent indicator tube.

6. To turn on or off the laser, press [PLAY MODE] button. The

message “LASER ON” or “LASER OFF” appears on the fluorescent indicator tube.

7. To release from this mode, press ?/1 button.

Aging mode sequence:

[AGING MODE]

• This mode can be used for operation check of CD section. If an error occurs, the aging operation would stops and the status is displayed. If there were no error occurs, the aging operation would continue repeatedly.

Procedure:

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

2. Select CD function.

3. Load five discs on the disc tray.

4. Press [PLAY MODE] button to select the “ALL DISCS” mode,

and press the [REPEAT] button to select “REPEA T OFF” mode.

5. Press x (T APE B) button, [TUNER ENTER] button, and [DISC

4] button simultaneously.

6. Aging operation is started.

7. T o release from this mode, press ?/1 button or disconnect the

power cord to turn the power OFF.

HCD-ZX6/ZX8

• Display when an error occurred (CD Error Code Mode)

Procedure:

1. Press x (TAPE B) button, [TUNER ENTER] button and [DISC SKIP] button simultaneously to enter the error code display

mode.

2. The fluorescent indicator tube displays the number of total error.

3. Each time M (CD) button or m (CD) button is pressed, display change as below.

Display of Total Error

FF button

AMS (+)

button

FF button

AMS (+)

button

FR button

Display of

Mechanical

Error

FR button

Display of

No Disc

Error

AMS (–)

button

AMS (_)

button

• Display of no disc errors

D*$$%%&&##00

D*: The number of no disc error (“00” is latest one) (Press > (CD) button or . (CD) button to display next error) $$: Error type

01: Focus error 02: GFS error

03: Setup error %%: Not used &&:

00: No disc judgment without chucking retry.

01: No disc judgment after chucking retry. ##: The state when judged as no disc

01: Stop

02: Setup

03: TOC reading

04: Access

05: Playback

06: Pause

07: Manual search (Play)

08: Manual search (Pause)

[CD REPEAT 5 LIMIT OFF MODE]

• The number of repeat for CD playback is 5 times when the repeat mode is “REPEAT ALL”. This mode enables CD to repeat playback for limitless times.

4. To clear the error record, operate the cold reset. (Refer to the “MC COLD RESET”)

5. T o release from this mode, press the ?/1 button or disconnect the power plug to turn the power OFF.

• Display of total error

Em **Ed**

Em**: The number of mechanical errors. Ed**: The number of no disc errors after chucking the disc.

• Display of mechanical errors

M*$$%%&&##00

M*: The number of mechanical error (“00” is latest one) (Press > (CD) button or . (CD) button to display next error) $$: Not used %%: Loading related error (Second figure is not used)

D: Stop by the problem other than mechanical problem

while closing.

E: Stop by the problem other than mechanical problem

while opening.

C: Stop by the problem other than mechanical problem

while chucking up.

F: Stop by the problem other than mechanical problem

while chucking down.

&&: Emerging error

01: Stop while chucking up. 02: Stop while chucking up. 03: Time-out of EX-CHANGE open. 05: Time-out of EX-CHANGE close.

##: Not used

Procedure:

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

2. Select CD function.

3. Press x (TAPE B) button, [TUNER ENTER] button and [REPEAT] button simultaneously to enter the CD repeat 5 limit off mode and the fluorescent indicator tube displays “LIMIT OFF”.

•To release from this mode, operate the cold reset. (Refer to the

“MC COLD RESET”)

[CD SHIP MODE (WITH MEMORY CLEAR)]

•This mode moves the optical pick-up to the position durable to

vibration and clears all data including preset data stored in the RAM to initial conditions. Use this mode when returning the set to the customer after repair.

Procedure:

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

2. Select CD function.

3. Press [EXCHANGE] button and ?/1 button simultaneously. The set will power off automatically.

4. After the “STANDBY” blinking display finish, a message “LOCK” is displayed on the fluorescent indicator tube and the CD ship mode is set.

HCD-ZX6/ZX8

[CD SHIP MODE (WITHOUT MEMORY CLEAR)]

•This mode moves the optical pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.

Procedure:

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

2. Select CD function.

3. Press [REPEAT] button and ?/1 button simultaneously. The

set will power off automatically.

4. After the “STANDBY” blinking display finish, a message

“LOCK” is displayed on the fluorescent indicator tube and the CD ship mode is set.

[CD POWER MANAGE]

•This mode let you switch on or off power supply to the BU during TUNER function.

•When CD POWER is set to OFF, the power supply to the BU is cut off during TUNER function. It will increase the time taken to access CD when function change from TUNER to CD but it will improve tuner reception.

•When CD POWER is set to ON, the power supply to the BU is not cut off during TUNER function. It will reduce the time taken to access CD when function change from TUNER to CD but it will decrease tuner reception performance.

Procedure:

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

2. Select CD function.

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

4. Press x (CD) button and ?/1 button simultaneously. The set

will power on automatically.

5. The message “CD POWER ON” or “CD POWER OFF” will

be displayed on the fluorescent indicator tube.

[CD TRAY LOCK MODE]

•This mode let you lock the disc tray. When this mode is activated, the disc tray will not open when [OPEN/CLOSE] button or [EX-CHANGE] button is pressed. The message “LOCKED” will be displayed in on the fluorescent indicator tube.

Procedure:

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

2. Select CD function.

3. Press x (CD) b utton and [OPEN/CLOSE] button simultaneously

and hold down until “LOCKED” or “UNLOCKED” displayed on the fluorescent indicator tube (around 5 seconds).

[VIDEO/MD SWITCHING]

•This mode let you switch from VIDEO to MD and vice-versa.

Procedure:

1. During Power Off, press [FUNCTION] button and ?/1 button

simultaneously. The set power on automatically and the function will changed to MD. Do the same procedures again to change from MD to VIDEO.

SECTION 5

MECHANICAL ADJUSTMENTS

HCD-ZX6/ZX8

SECTION 6

ELECTRICAL 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

2.9 – 6.9 mN • m

FWD (30 to 70 g • cm)

CQ-102C (0.42 – 0.97 oz • inch)

FWD back tension

FF/REW CQ-201B (80 to 170 g • cm)

0.19 – 0.59 mN • m (2 to 6 g • cm)

(0.03 – 0.08 oz • inch)

7.8 – 16.7 mN • m

(1.11 – 2.36 oz • inch)

DECK SECTION

Precaution

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 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 RCH.

7. Switches and controls should be set as follows unless otherwise specified.

8. Set to the test mode. (1) Press the ?/1 button to turn the power ON. (2) Select the function “TAPE A or B”. (3) Press the button of x (TC-B) , [TUNER ENTER], and [DISC

3] simultaneously, to set the tape deck test mode and displays “TEST MODE” on the fluorescent indicator tube.

(4) To release from the test mode, press the ?/1 button.

•Test Tape

Tape Signal Used for

P-4-A100 10 kHz, –10 dB Azimuth Adjustment

WS-48B 3 kHz, 0 dB Tape Speed Adjustment

0 dB=0.775 V

HCD-ZX6/ZX8

)

Record/Playback Head Azimuth Adjustment

DECK A DECK B

Note: Perform this adjustments for both decks

Procedure:

1. Mode: Playback (FWD)

test tape P-4-A100 (10 kHz, – 10 dB)

2. Turn the adjustment scre w 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.

L-CH peak

Output level

MAIN board VIDEO/MD OUT jack (J701) L-CH, R-CH

level meter

set

within 1dB

Adjustment Location: Playback Head (Deck A).

Record/Playback/Erase Head (Deck B).

forward

reverse

R-CH

Screw position

peak

L-CH peak

R-CH peak

Screw position

3. Mode: Playback

test tape P-4-A100 (10 kHz, – 10 dB)

L-CH

set

R-CH

in phase 45°90°135°180

4. Repeat step 1 to 3 in playback (REV) mode.

MAIN board

VIDEO/MD

L-CH

R-CH

waveform of oscilloscope

good

OUT jack (J701

oscilloscope

wrong

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

HCD-ZX6/ZX8

CD SECTION

Note:

1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given.

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

3. Use an oscilloscope with more than 10M 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

BD81A board TP0102(FE1)

TP117(VC)

Procedure:

1. Connect oscilloscope to TP102 (FE1) and TP117 (VC).

2. Press the ?/1 button to turn the power ON.

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

4. Confirm that the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak lev el within 3 ±0.5 Vp-p.

S-curve waveform

symmetry

Note: Clear RF signal waveform means that the shape “◊” can be

clearly distinguished at the center of the waveform.

VOLT/DIV : 200mV TIME/DIV : 500ns

level : 1.3

0.3Vp-

Checking Location:

TP117 (VC)

TP0102 (FE1)

IC101

within 3

0.5Vp-

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

BD81A board

TP124(RFACO) TP117(VC)

Procedure:

1. Connect oscilloscope to TP124 (RFACO) and TP117 (VC).

2. Press the ?/1 button to turn the power ON.

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

4. Confirm that oscilloscope waveform is clear and check RFAC signal level is correct or not.

TP124 (RFACO)

HCD-ZX6/ZX8

7-1. CIRCUIT BOARDS LOCATION

SECTION 7

DIAGRAMS

PANEL board

POWER SWITCH board

TC-A board

MIC board

CD-L board

JOG board

CD-R board

VOL board

VOLTAGE SELECTOR board

POWER SWITCHING

FUNCTION SW boar

TC-B board

GAME-IN/HP board

CURSOR board

SURROUND board

POWER board

SE-130 board

TRANS board

SENSOR board

MAIN board

BD81A boar

MD-94 board

HCD-ZX6/ZX8

Ver 1.1

7-2. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

Note on Printed Wiring Board:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

• : Pattern from the side which enables seeing.

(The other layer’s patterns are not indicated.)

Caution: Pattern face side: Parts on the pattern face side seen from (Conductor Side) the pattern face are indicated. Parts face side: Parts on the parts face side seen from (Component Side) the parts face are indicated.

• Indication of transistor.

C Q

• Abbreviation E2 : 120 V AC area in E model E51 : Chilean and Peruvian model MX : Mexican model

UNLEADED SOLDER

These are omitted.

Boards requiring use of unleaded solder are printed with the lead free mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

Note on Schematic Diagram:

• All capacitors are in µF unless otherwise noted. (p: pF) 50 WV or less are not indicated except for electrolytics and tantalums.

• All resistors are in Ω and 1/ specified.

• 2 : nonflammable resistor.

• C : panel designation.

Note: The components identified by mark 0 or dotted line

with mark 0 are critical for safety. Replace only with part number specified.

• A : B+ Line.

• B : B– Line.

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

no mark : FM <>: CD PLAY

•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 : AUDIO f : TUNER E : TAPE PLAY (DECK A) d : TAPE PLAY (DECK B) G : TAPE REC (DECK B) J : CD PLAY

• Abbreviation

E2 : 120 V AC area in E model E51 : Chilean and Peruvian model MX : Mexican model

: Impossible to measure

∗

W or less unless otherwise

7-3. WAVEFORMS

— MAIN Board —

32.768kHz

IC401 qa (XC-OUT)

16MHz

IC401

(X-OUT)

2.8Vp-p

0.5Vp-p

— PANEL Board —

2.6Vp-p

4MHz

IC901 is (XOUT)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350 °C. Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful!

• Strong viscosity Unleaded solder is more viscou-s (sticky , less prone to flo w) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.

• Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder.

HCD-ZX6/ZX8

29 29

+ 67 hidden pages

Sony HCDZX-6 Service manual

TABLE OF CONTENTS

SERVICE NOTE

GENERAL

DISASSEMBLY

case

loading panel

front panel section

tape mechanism

back panel section

table assy

SE-130 board

TD belt

DC motor (M901)

optical pick-up

BD81A board

TEST MODE

MECHANICAL ADJUSTMENTS

ELECTRICAL ADJUSTMENTS

DIAGRAMS