Sony DV-8000 Service manual

D-V8000

SERVICE MANUAL

Ver 1.2 1998. 12 With SUPPLEMENT 1 (9-923-273-81) With SUPPLEMENT 2 (9-923-273-83)

SPECIFICATIONS

System

Compact disc digital audio/video system

Laser diode properties

Material: GaAlAs Wavelength: λ=780 nm Emission duration: Continuous Laser output power: Less than 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.

Error correction

Sony Super Strategy Cross Interleave Reed Solomon Code

D-A conversion

1-bit

Channel number

2 channels

Frequency response

20 - 20,000 Hz dB (measured by EIAJ CP-307)

Output (at 6 V input level)

Headphones (stereo minijack) 10 mW + 10 mW at 16 ohms Line output (stereo minijack) Output level 0.7 V rms at 47 kilohms Recommended load impedance over 10 kilohms Video output (minijack) Output level 1 Vp-p at 75 ohms Recommended load impedance over 75 ohms

+1 –2

E Model

Chinese Model

Tourist Model

Model Name Using Similar Mechanism D-223 CD Mechanism Type KSM-331CAN (S) Optical Pick-Up Name KSS-331C

General Power requirements

Player:

• Four LR6 (size AA) batteries: 6 V DC

• AC power adaptor (DC IN 6 V jack): 120 V, 60 Hz 220 - 230 V, 50/60 Hz 100 - 240 V, 50/60 Hz (AC power required differs depending on where you purchased the player.)

Remote control:

• Two LR6 (size AA) batteries 3 V DC

Dimensions (w/h/d) (incl. projecting parts and controls)

Approx. 140.5 × 30.5 × 144.2 mm (7 × 13/8 × 53/4 in.)

Mass (excl. rechargeable batteries)

Approx. 330 g (14 oz) Approx. 440 g (1 lb 2 oz) (incl. alkaline batteries and a CD)

Operating temperature

5˚C - 35˚C (41˚F - 95˚F)

Supplied accessories

AC power adaptor (1) AV monitor cord (1) Remote control (1)

Design and specifications are subject to change without notice.

MICROFILM

PORTABLE VIDEO CD PLAYER

1. GENERAL ................................................................... 3

2. SERVICING NOTES ............................................... 16

3. DISASSEMBLY ......................................................... 18

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.

4. SERVICE MODE (TEST MODE)...................... 20

5. ELECTRICAL ADJUSTMENTS......................... 21

6. DIAGRAMS

6-1. IC Pin Function Description ........................................... 24

6-2. Block Diagram ................................................................ 33

6-3. Printed Wiring Board – MAIN Board – ........................ 38

6-4. Schematic Diagram – MAIN Board (1/2) – ................... 41

6-5. Schematic Diagram – MAIN Board (2/2) – ................... 46

6-6. Schematic Diagram – LCD Board –............................... 49

6-7. Printed Wiring Board – LCD Board –........................... 51

7. EXPLODED VIEWS ................................................ 62

8. ELECTRICAL PARTS LIST ............................... 65

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.

CAUTION

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

SAFETY-RELATED COMPONENT WARNING!!

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

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SECTION 1

GENERAL

This section is extracted from instruction manual.

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SECTION 2

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 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 breakdown 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 objecti ve lens.

Before Replacing the Optical Pick-Up Block

Please be sure to check thoroughly the parameters as par the “Optical Pick-Up Block Checking Procedures” (Part No.: 9-960-027-

11) issued separately before replacing the optical pick-up block. Note and specifications required to check are given below.

• FOK output: IC601 (£ pin (FOK) When checking FOK, remove the lead wire to disc motor.

• S curve P-to-P value: 2.0 Vp-p IC501 !§ pin When checking S curve P-to-P value, remove the lead wire to disc motor.

• RF signal P-to-P value: 0.8-1.2 Vp-p

• Traverse signal P-to-P value: 0.7-1.7 Vp-p

• The repairing grating holder is impossible.

Precautions for Checking Emission of Laser Diode

Laser light of the equipment is focused by the object lens in the optical pick-up so that the light focuses on the reflection surface of the disc. Therefore, be sure to keep your eyes more than 30 cm apart from the object lens when you check the emission of laser diode.

Laser Diode Checking Methods

During normal operation of the equipment, emission of the laser diode is prohibited unless the upper lid is closed while turning ON the S401 (push switch type). The following two checking methods for the laser diode are operable.

• Method-1 (In the service mode or normal operation): Emission of the laser diode is visually checked.

1. Open the upper lid.

2. Push the S401 as shown in Fig. 1.

3. Press the ﬂ key

4. Check the object lens for confirming normal emission of the

laser diode. If not emitting, there is a trouble in the automatic power control circuit or the optical pick-up. During normal operation, the laser diode is turned ON about

2.5 seconds for focus searching.

S401

Fig. 1 Method to push the S401

– 16 –

• Method-2 (In service mode or normal operation): Check the value of current flowing in the laser diode.

1. Remove the upper cabinet.

2. Read the current printed on the label attached on the rear side

of the optical pick-up.

(Label stuck outside of the optical pick-up)

KSS-331C

24Y59

day

action number year

month

SA350

Indicates current value. (In this case, 35.0 mA)

A current value will vary depending on the set.

3. Connect a digital voltmeter as shown in Fig. 2.

4. Press the ﬂ key.

5. Calculate current value by the reading of the digital voltmeter .

Reading of the digital voltmeter (V) ÷ 4.7 (Ω) = current value (A) (Example) Reading of the digital voltmeter of 0.1645 V:

0.1645 V ÷ 4.7 Ω = 0.035 (A) = 35 mA

6. Check that the current value is within the following range.

• Current value of the label mA (25˚C) Variation by temperature: 0.4 mA/˚C Current increases with temperature increased. Current decreases with temperature decreased.

If the current is more than the range above, there is a trouble in the automatic power control circuit or the laser diode is in deterioration. If less than the range, a trouble exists in the automatic power control circuit or the optical pick-up.

+5 –11

– MAIN Board – (Side B)

IC601

Q501

IC501

IC502

Fig. 2 Digital voltmeter connecting location

– 17 –

digital voltmeter

+ –

SECTION 3

DISASSEMBLY

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

3-1. CABINET (UPPER) ASS’Y

2

two claws

2

claw

3

cabinet (upper) ass’y

2

claw

1

two screws (2

1

three screws

2

claw

– 18 –

3-2. UPPER LID BLOCK ASS’Y

1

spring (lock)

2

spring (open)

5

4

Open the upper li block ass’y.

shaft

3

Push the open button.

7

Pull up the upper lid block ass’y to direction of arrow

8

Remove the upper lid block ass’

to direction of arrow C.

6

Close the upper lid block ass’y to direction of arrow

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SECTION 4

SERVICE MODE (TEST MODE)

• In this set, there are two test modes; CD-DA Test Mode and VIDEO CD Test Mode.

4-1. How to Enter the Test Mode

1. Disconnect external power (no current is applied to the set).

2. Bridge the SOL701 (TEST) on the MAIN Board with a sol-

der. (IC701 (∞ (TEST) pin is shorted to the ground.)

3. Connect the external power.

4. The CD-DA Test Mode is activated. (LCD display v aries in 5-

ways, and its 5-way display is repeated.)

5. Before connecting external power in step 3, if π (POWER

OFF) key was pressed, the mode is switched to VIDEO CD Test Mode. (On the LCD, all segments are displayed, and the TV monitor becomes 100% white.)

4-2. How to Release the Test Mode

1. Always disconnect external power , and break the solder bridge

of SOL701 (TEST) on the MAIN Board.

2. Thus, the set become ready for normal operation.

4-3. Each key Function in Test Mode

1. CD-DA Test Mode

Switches Description

(POWER OFF)

ﬂ

(PLAY/PAUSE)

g Repeat once more the processing currently

SELECT selected with ﬂ (PLAY/PAUSE) key.

(NEXT)

≠

(PREV)

(RETURN)

ESP

REPEAT/

ENTER

MENU Raise K23** by one step after Tracking

–

MENU Lower K23** by one step after Tracking

* Coefficient of Focus Gain ** Coefficient of Tracking Gain

Stop processing

Press once: Initialize, Average Correct Press twice: Auto Focus Press 3 times: Focus Auto Gain Press 4 times: Tracking Auto Gain Press 5 times: All Servo ON, Mute OFF

Move optical pick-up toward outside track

Move optical pick-up toward inside track

Turn off the Mute

Turn on/off the ESP (f ast speed play, when ON)

Tracking Gain up/normal switching

Raise K13* by one step after Focus Auto Gain

Auto Gain Lower K13* by one step after Focus Auto

Gain

Auto Gain

2. VIDEO CD Test Mode Switches Description

(POWER OFF)

SELECT

– MAIN Board – (Side A)

TV monitor

Go to CD-DA Test Mode

Video system reset (return to 100% white screen)

Monitor IN Video OUT

J901

CN501

CN701

SOL701

(TEST)

Fig. 1 Test terminal location and connecting position

– 20 –

SECTION 5

0 V

1.2

0.5 Vp-p

A=B A=B

Note: Take long sweep time

for easy monitoring.

ELECTRICAL ADJUSTMENTS

5-1. Precautions for Adjustment

1. Before beginning adjustment, set the equipment to service mode. After the completion of adjustment, be sure to reset the service mode. For more information, see “Service Mode (Test Mode)” on page 20.

2. Perform adjustments in the order given.

3. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise indi- cated.

4. Power supply voltage requirement: DC6 V HOLD switch : OFF VOLUME control : Minimum RESUME switch : OFF

5-2. Before Beginning Adjustment

Set the equipment to service mode (See page 20) and check the following. If there is an error, repair the equipment.

• Checking of the sled motor

1. Open the upper lid.

2. Press the ﬂ key once.

3. Press the ± and ≠ keys and check that the optical pickup can move smoothly without sluggishness or abnormal noise in innermost periphery → outermost periphery → innermost periphery.

± : The optical pick-up moves outwardly. ≠ : The optical pick-up moves inwardly.

5-3. Tracking Balance Check

Condition:

• Hold the set in horizontal state.

Connection:

MAIN board TP524 (TE)

TP534 (VC)

(see page 23)

oscilloscope

(DC range)

+ –

Checking Method:

1. Connect the oscilloscope to TP524 (TE) and TP534 (VC) on the MAIN board.

2. Set the equipment to service mode stop state. (See page

20.)

3. Press the ﬂ key once.

4. Move the optical pick-up to the center by pressing the ± and ≠ keys.

5. Put the disc (YEDS-18).

6. Press the ﬂ key twice.

From focus searching, focus is turned ON while entering CLV drawing-in mode. Tracking and sled are turned OFF.

7. Confirm that a waveform on the oscilloscope is vertically symmetric against 0 V.

• Checking of focus searching

1. Open the upper lid.

2. Press the ﬂ key thrice. (Focus searching operation is activated continuously.)

3. Check the object lens of the optical pick-up for smooth up/ down motion without sluggishness or abnormal noise.

4. Press the π key. Check that focus searching operation is deactivated. If not, again press the π key slightly longer.

8. Stop removing of the disc motor by pressing the π key.

9. After the completion of check, reset service mode. (See page 20.)

Connection Location: MAIN board (See page 23.)

– 21 –

5-4. Focus Bias Check

Condition:

• Hold the set in horizontal state.

Connection:

oscilloscope

(AC range)

MAIN board

TP535 (RFO) TP534 (VC) (see page 23)

2 k

Ω

+ –

Checking Method:

1. Connect the oscilloscope to TP535 (RFO) and TP534 (VC) on the MAIN board.

2. Set the equipment to service mode stop state. (See page

20.)

3. Press the ﬂ key once.

4. Move the optical pick-up to the center by pressing the ± and ≠ keys.

5. Put the disc (YEDS-18).

6. Press the ﬂ key four times.

From focus searching, focus is turned ON while entering CL V dra wing-in mode. Both tracking and sled are turned ON.

7. Check the oscilloscope waveform is as shown below. A good eye pattern means that the diamond shape (≈) in the center of the waveform can be clearly distinguished.

RF SIGNAL REFERENCE WAVEFORM (EYE PATTERN) VOLT/DIV : 200 mV (With the 10:1 probe in use)

TIME/DIV: 500 ns

RF level

0.7 ± 0.2 Vp-p

To watch the eye pattern, set the oscilloscope to AC range

and increase the vertical sensitivity of the oscilloscope for easy watching.

8. Stop revolving of the disc motor by pressing the π key.

9. After the completion of check, reset service mode. (See page 20.)

Connection Location: MAIN board (See page 23.)

– 22 –

Connection Location

– MAIN Board – (Side A)

CN501

CN701

TP534

(VC)

TP524

(TE)

TP535 (RFO)

– 23 –

SECTION 6

DIAGRAMS

6-1. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD (1/2) IC601 CXD2545Q (DIGITAL SIGNAL PROCESSOR, FOCUS/TRACKING/SLED SERVO, EFM COMPARATOR)

Pin No. Pin Name I/O Function

1 SRON O Sled servo drive PWM signal output terminal Not used (open) 2 SRDR O 3 SFON O 4 TFDR O 5 TRON O 6 TRDR O 7 TFON O 8 FFDR O

9 FRON O 10 FRDR O Focus servo drive PWM signal (–) output to the MPC17A38ZVMEL (IC502) 11 12 13 VCOI I Oscillator circuit input terminal for analog PLL of the playback EFM 14 TEST I Input terminal for the test (fixed at “L”) 15 DVSS — 16 TES2 I Input terminal for the test (fixed at “L”) 17 TES3 I Input terminal for the test (fixed at “L”) 18 PDO O 19 VPCO O PLL charge-pump output terminal for the variable pitch Not used (open) 20 VCKI I Master clock signal (16.9344 MHz) input from the D/A converter (IC320) for the variable pitch 21 22 23 24 25 26 27 TE I 28 SE I Sled error signal input from the CXA1791N (IC501) 29 30 31 32 33 34 35 36 37 38 39 40 AVD1 — Power supply terminal (+3.3V) (analog system) 41 DVDD — Power supply terminal (+3.3V) (digital system) 42 ASYE I Playback EFM asymmetry circuit on/off selection input terminal (fixed at “H”) 43 PSSL I Audio data output mode selection input terminal (fixed at “L”) 44 WDCK O Word clock signal (88.2 kHz) output terminal Not used (open)

FFON O Focus servo drive PWM signal output terminal Not used (open)

VCOO O Oscillator circuit output terminal for analog PLL of the playback EFM

AVD2 — Power supply terminal (+3.3V) (analog system)

IGEN I Power supply terminal (+3.3V) (for operational amplifier) AVS2 — Ground terminal (analog system) ADIO I Input terminal for the A/D converter Not used (open)

RFC O Output terminal of the operational amplifier Not used (open)

RFDC I RF signal (DC level) input terminal for the digital servo process

FE I Focus error signal input from the CXA1791N (IC501)

VC I Middle point voltage (+1.65V) input from the CXA1791N (IC501)

FILO O Filter output terminal for master clock of the playback master PLL

FILI I Filter input terminal for master clock of the playback master PLL

PCO O Phase comparison output terminal for master clock of the playback EFM master PLL CLTV I Internal VCO control voltage input of the playback master PLL AVS1 — Ground terminal (analog system) RFAC I RF signal (AC level) input terminal for the EFM demodulator

BIAS I Constant current input terminal of the playback EFM asymmetry circuit ASYI I Playback EFM asymmetry comparator voltage input terminal

ASYO O

Sled servo drive PWM signal (–) output to the MPC17A38ZVMEL (IC502) Sled servo drive PWM signal output terminal Not used (open) Tracking servo drive PWM signal (–) output to the MPC17A38ZVMEL (IC502) Tracking servo drive PWM signal output terminal Not used (open) Tracking servo drive PWM signal (+) output to the MPC17A38ZVMEL (IC502) Tracking servo drive PWM signal output terminal Not used (open) Focus servo drive PWM signal (+) output to the MPC17A38ZVMEL (IC502) Focus servo drive PWM signal output terminal Not used (open)

Ground terminal (digital system)

Charge-pump output terminal for analog PLL of the playback EFM Not used (open)

Tracking error signal input from the CXA1791N (IC501)

Playback EFM full-swing output terminal

– 24 –

Pin No. Pin Name I/O Function

45 LRCK O

L/R sampling clock signal (44.1 kHz) output to the D-RAM controller (IC680) and MPEG

46 DATA O

47 BCLK O 48 64 DATA O

49 64 BCLK O

50 64 LRCK O

51 GTOP O

52 XUGF O

53 XPLCK O

54 GFS O

55 RFCK O

56 C2PO O 57 XRAOF O

58 MNT3 O

59 MNT2 O

60 MNT1 O

61 MNT0 O 62 XTAI I Master clock signal (16.9344 MHz) input from the D/A converter (IC320)

63 XTAO O Master clock output terminal (16.9344 MHz) Not used (open)

64 XTSL I Master clock selection input terminal (fixed at “L”)

65 DVSS — Ground terminal (digital system)

66 FSTI I 2/3 divider input terminal of pins ^™ (XATI) and ^£ (XTAO)

67 FSTO O 2/3 divider output terminal of pins ^™ (XATI) and ^£ (XTAO)

68 C4M O 4.2336 MHz clock signal output terminal Not used (open)

69 C16M O 16.9344 MHz clock signal output terminal Not used (open)

70 MD2 I Digital out on/off control signal input terminal Fixed at “H” in this set

71 DOUT O Digital signal (for coaxial out and optical out) output terminal Not used (open)

72 EMPH O Emphasis control signal output terminal Not used (open)

73 WFCK O Write frame clock signal output terminal Not used (open)

audio/video decoder (IC901) DA16 output when PSSL=“H”, 48-bit slot serial data output when PSSL=“L”

(PSSL (pin $£)=fixed at “L”) Serial data output to the D-RAM controller (IC680) and MPEG audio/video decoder (IC901)

DA15 output when PSSL=“H”, 48-bit slot bit clock signal output when PSSL=“L” (PSSL (pin $£)=fixed at “L”) Bit clock signal (2.8224 MHz) output to the D-RAM controller (IC680) and MPEG audio/video decoder (IC901)

DA14 output when PSSL=“H”, 64-bit slot serial data output when PSSL=“L” (PSSL (pin $£)=fixed at “L”) Not used (open)

DA13 output when PSSL=“H”, 64-bit slot bit clock signal output when PSSL=“L” (PSSL (pin $£)=fixed at “L”) Not used (open)

DA12 output when PSSL=“H”, 64-bit slot L/R sampling clock signal output when PSSL=“L” (PSSL (pin $£)=fixed at “L”) Not used (open)

DA11 output when PSSL=“H”, GTOP signal output when PSSL=“L” (PSSL (pin $£)=fixed at “L”) Not used (open)

DA10 output when PSSL=“H”, XUGF signal output when PSSL=“L” (PSSL (pin $£)=fixed at “L”) Not used (open)

DA09 output when PSSL=“H”, XPLCK signal output when PSSL=“L” (PSSL (pin $£)=fixed at “L”) Not used (open)

DA08 output when PSSL=“H”, GFS (guard frame sync) signal output when PSSL=“L” (PSSL (pin $£)=fixed at “L”) Not used (open)

DA07 output when PSSL=“H”, RFCK (read frame clock) signal output when PSSL=“L” (PSSL (pin $£)=fixed at “L”) Read frame clock signal output to the D-RAM controller (IC680)

DA06 output when PSSL=“H”, C2PO signal output when PSSL=“L” (PSSL (pin $£)=fixed at “L”) C2PO signal output to the D-RAM controller (IC680) and MPEG audio/video decoder (IC901)

DA05 output when PSSL=“H”, XRAOF (RAM over flow) signal output when PSSL=“L” (PSSL (pin $£)=fixed at “L”) Not used (open)

DA04 output when PSSL=“H”, MNT3 (monitor 3) signal output when PSSL=“L” (PSSL (pin $£)=fixed at “L”) Not used (open)

DA03 output when PSSL=“H”, MNT2 (monitor 2) signal output when PSSL=“L” (PSSL (pin $£)=fixed at “L”) Not used (open)

DA02 output when PSSL=“H”, MNT1 (monitor 1) signal output when PSSL=“L” (PSSL (pin $£)=fixed at “L”) Not used (open)

DA01 output when PSSL=“H”, MNT0 (monitor 0) signal output when PSSL=“L” (PSSL (pin $£)=fixed at “L”) Not used (open)

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+ 57 hidden pages

Sony DV-8000 Service manual

TABLE OF CONTENTS

GENERAL

SERVICING NOTES

DISASSEMBLY

SERVICE MODE (TEST MODE)

ELECTRICAL ADJUSTMENTS

DIAGRAMS