Jvc XL-SV205-GD Service Manual

SERVICE MANUAL

XL-SV205GD

VIDEO CD PLAYER

XL-SV205GD

POWER ON / OFF

1 – MIC VOLUME – 2 ECHO

MIN MAX MIN MAX MIN MAX

1 — MIC — 2

OPEN/CLOSE

RETURN

1 2 3 4 5

+10 6 7 8 9 10/0

VCD / CD 10 KEY

10/0

1 2

7 8 9

10+

654

P/N

IMPORTANT

PLEASE TAKE NOTE BEFORE ORDERING

1. Order all service parts through JVC ASIA PTE LTD.-Customer Satisfaction Dept.

2. Two order are availiable: Initial order and last order (Before End of Line).

3. Minimum order quantity: 100pcs

4. Delivery term: Minimum 2 months upon confirmation of order.

Contents

Safety precautions ------------------------------------------------- 1-2 Preventing static electricity ------------------------------------- 1-3 Disassembly ---------------------------------------------------------- 1-4 Description of major IC ----------------------------------------- 1-5

No:28206 Jun. 2001

XL-SV205GD

Safety precautions

1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorised in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.

2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturer’s warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.

3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, the Parts List of Service Manual. Electrical components having such features are identified by shading on the

schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards.

4. The leads in the products are routed and dressed with ties, clamps, tubing’s, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.

5. Leakage current check (Electrical Shock hazard testing) After re-assembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. Do not use a line isolation transformer during this check.

• Plug the AC line cord directly into the AC outlet. Using a “Leakage Current Tester”, measure the

leakage current from each exposed metal parts of the cabinet, particularly and exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.)

• Alternate check method

Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a

0.15µF AC-type capacitor between an exposed metal part and a known good earth ground. Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed

metal part, particularly any exposed metal part

having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. voltage measured Any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).

0.15µF AC TYPE

1500 10W

AC Voltmeter (Having 1000 ohms/volts, or more sensitivity

Place this probe on each exposed metal part.

Good earth ground

Warning

1. This equipment has been designed and manufactured to meet international safety standards.

2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.

3. Repairs must be made in accordance with the relevant safety standards.

4. It is essential that safety critical components are replaced by approved parts.

5. If mains voltage selector is provided, check setting for local voltage.

1-2

XL-SV205GD

Preventing static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

1.1. Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players. Be careful to use proper grounding in the area where repairs are being performed.

1.1.1. Ground the workbench

1. Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it.

1.1.2. Ground yourself

1. Use an anti-static wrist strap to release any static electricity built up in your body.

(caption) Anti-static wrist strap

Conductive material (conductive sheet) or iron plate

1.1.3. Handling the optical pickup

1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.)

2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester’s internal

power source can easily destroy the laser diode.

1.2. Handling the traverse unit (optical pickup)

1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.

2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For spe-

cific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector.

3. Handle the flexible cable carefully as it may break when subjected to strong force.

4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.

1-3

XL-SV205GD

Disassembly

Procedure of disassembly

No. Description QTY. Action Remark

1 Main part 1 Place 2 Plane tray 1 Remove Turn on VCD, open the plane tray

then take up the CD door. 3 Self screw 1 Loosen screw Loose the screw, remove from the upper cover. 4 ¢4.0 Self screw 4 Loosen screw 5 Upper cover 1 Remove Loose screws then remove the upper cover

from the main part. 6 Self screw 5 Loosen screw 7 Self screw 1 Loosen screw 8 Front panel block 1 Remove Remove the front panel block from the main part.

1-4

IC lead identification, internal diagram and description

IC301: HT16512 (VFD DRIVER)

Block diagram

XL-SV205GD

Pin configuration (Top view)

1-5

XL-SV205GD

Pin description

Symbol Pin Name Pin No. Description

IN Data input 6 Inputs serial data at the rising edge of the shift clock, starting from

the low order bit.

OUT Data output 5 Output serial data at the falling edge of the shift clock, starting from

the low order bit. This is the N-ch open-drain output pin.

STB Strobe 9 Initializes the serial interface at the rising or falling edge of the µPD16512.

It then waits for reception of a command. Data input after STB has fallen is processed as a command. While command data is processed, current

processing is stopped, and the serial interface is initialized. While STB is

high, CLK is ignored. CLK Clock input 8 Reads serial data at the rising edge, and outputs data at the falling edge. OSC Oscillator pin 44 Connect a resistor to this pin to determine the oscillation frequency to this

pin. Seg1/KS1 to High-voltage 15 to 20 Segment output pins (Dual function as key source) Seg6/KS6 output Seg7 to seg11 High-voltage 21 to 25 Segment output pins

output (segments)

Grid1 to Grid6 High-voltage 37 to 32 Grid output pins

output (grid) Seg12/Grid11 to High-voltage 26,28 to 31 These pins are selectable for segment or grid driving. Seg16/Grid7 output

(segment/grid) Led to Led Led output 42 to 39 CMOS output. +20 mA max. Key1 to Key4 Key data input 10 to 13 Data input to these pins is latched at the end of the display cycle. SW1 to SW4 Switch input 1 to 4 These pins constitute a 4-bit general-purpose input port. VDD Logic power 14, 38 5V ± 10% Vss Logic ground 7, 43 Connect this pin to system GND. V

EE Pull-down level 27 VDD-35 V max.

IC203: PT2399 (ECHO PROCESSOR)

Block diagram

1-6

Pin configuration

Pin description

Pin No. Pin Name I/O Description

1 VCC - Analog supply voltage input 2 REF - Analog reference voltage (=1/2Vcc) 3 AGND - Analog ground 4 DGND - Digital ground 5 CLK_O O System clock output pin 6 VCO I Frequency adjustment pin 7 CC1 - Current control 1 8 CC0 - Current control 0 9 OP1-OUT O OP amplifier 1 output

This pin can be used as modulated integrator by connecting capacitor.

10 OP1-IN I OP amplifier 1 input

This pin can be used as demodulated integrator by connecting capacitor.

11 OP2-IN I OP amplifier 2 input

This pin can be used as demodulated integrator by connecting capacitor.

12 OP2-OUT O OP amplifier 2 output

This pin can be used as modulated integrator by connecting capacitor. 13 LPF2-IN I Low pass filter 2 input pin 14 LPF2-OUT O Low pass filter 2 output pin 15 LPF1-OUT O Low pass filter 1 output 16 LPF1-IN I Low pass filter 1 input

XL-SV205GD

IC201/IC202,U5/U6: BA4558 (OP-AMP)

Pin configuration

Pin description

Pin Function

1 A Output 2 A-Input 3 A+Input 4 V5 B+Input 6 B-Input 7 B Output 8 V+

1-7

XL-SV205GD

IC101: 7805 (REGULATOR)

Block diagram

Pin configuration

U1: CL680 (MPEG-1 DECODER)

Block diagram

1-8

Pin configuration

XL-SV205GD

Pin description (Maximum voltage)

Signal Input Output

Global Interface VDDMAX-IN RESET CLK_SEL(0:2) VDDMAX-IN Host Interface HCK VDDMAX-IN HD-IN VDDMAX-IN HD-OUT VDDMAX-IN HRDY - VDDMAX-OUT HSEL VDDMAX-IN HINT VDDMAX-IN CD Interface Signals CD-BCK VDDMAX-IN CD-DATA VDDMAX-IN CD-LRCK VDDMAX-IN CD-C2PO VDDMAX-IN CDG-SCK VDDMAX-IN VDDMAX-OUT CDG-SDATA VDDMAX-IN CDG-VFSY VDDMAX-IN CDG-SOS1 VDDMAX-IN DRAM Interface MD(15: 0) VDDMAX-IN VDD3 MA(10: 0) - VDD3

VDDMAX-OUT

Signal Input Output

RAS(0) - VDD3 RAS(1) - VDD3 CAS - VDD3 MWE - VDD3 MCE - VDD3 Video Interface PGIO0 VDDMAX-IN VDD3 PGIO1 VDDMAX-IN VDD3 PGIO2 VDDMAX-IN VDD3 PGIO3 VDDMAX-IN VDD3 VCK-IN VDDMAX-IN VREF Analog RREF Analog Y-OUT - AVDD C-OUT - AVDD COMPOS-OUT - AVDD Audio Interface DA-DATA VDDMAX-OUT DA-LRCK VDDMAX-OUT DA-BCK VDDMAX-OUT DA-XCK VDDMAX-IN DA-EMP - VDDMAX-OUT

1-9

XL-SV205GD

U2: C16256 (4MB DRAM)

Block diagram

Pin configuration

Pin description

Pin No. Pin Name Type Description

16~19,22~26 A0-A8 Input Address input 14 RAS Input Row address

strobe

28 CASH Input Column address

strobe/Upper byte control

29 CASL Input Column address

strobe/lower

byte control 13 WE Input Write enable 27 OE Input Output enable 2~5,6~10, I/O1 - I/O16 Input/Output Data input/ 31~34,36~39 output 1,6,20 Vcc Supply Power, 5V 21, 35, 40 Vss Ground Ground 11,12,15,30 NC - No connect

1-10

U3: 27C010 (1MB EEPROM)

Block diagram

XL-SV205GD

Pin configuration

U4: CS4338 (AUDIO DAC)

Block diagram

Pin description

I/O Pin Name Pin No. Description

- Vpp 1 Voltage input for program erase operations

I A16,A15,A12 2,3,4 Address input pins I A7-A0 5-12 Address input pins I/O D0-D2 13-15 Input/Output pins

- GND 16 Ground

I/O D3-D7 17-21 Input/Output pins I CE 22 Chip enable (Active low) I A10 23 Address input pins I OE 24 Output enable (Active low) I A11,A9,A8 25,26,27 Address input pins I A13,A14,A17 28,29,30 Address input pins I WE 31 Write enable bar (Active low)

- VCC 32 Power supply for device operation (5V ± 10%)

1-11

XL-SV205GD

Pin description

U7: CXD3068Q (CD DSP)

Block diagram

1-12

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