JVC XL-SV205GD User manual

SERVICE MANUAL
VIDEO CD PLAYER
XL-SV205GD
Contents
Safety precautions ------------------------------------------------- 1-2
Preventing static electricity ------------------------------------- 1-3
Disassembly ---------------------------------------------------------- 1-4
Description of major IC ----------------------------------------- 1-5
XL-SV205GD
POWER 1 – MIC VOLUME – 2 ECHO OPEN/CLOSE
RETURN
1—MIC—2
12345
[phone]/0
ON / OFF
MIN MAX MIN MAX MIN MAX
10/0
1 2 3
654
789
VCD / CD 10 KEY
10+
P/N
No:28206
Jun. 2001
COPYRIGHT2000VICTORCOMPANYOFJAPAN LTD.
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.

1-2
XL-SV205GD
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 1,50010W resistor paralleled by a
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.
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.).
Safety precautions
0.15µF AC TYPE
1500 10W
Place this
probe on
each exposed
metal part.
Good earth ground
AC Voltmeter
(Having 1000
ohms/volts,
or more sensitivity

1-3
XL-SV205GD
Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is dis-
charged, 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.
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.
Conductive material
(conductive sheet) or
iron plate
(caption)
Anti-static wrist strap

1-4
XL-SV205GD
Disassembly
Procedure of disassembly
No. Description QTY. Action Remark
1Main part 1Place
2Plane tray 1Remove Turn on VCD, open the plane tray
then take up the CD door.
3Self screw 1Loosen screw Loose the screw, remove from the upper cover.
4¢4.0 Self screw 4Loosen screw
5Upper cover 1Remove Loose screws then remove the upper cover
from the main part.
6Self screw 5Loosen screw
7Self screw 1Loosen screw
8Front panel block 1Remove Remove the front panel block from the main part.

1-5
XL-SV205GD
IC lead identification, internal diagram and description
IC301: HT16512 (VFD DRIVER)
Block diagram
Pin configuration (Top view)

1-6
XL-SV205GD
Pin description
Symbol Pin Name Pin No. Description
DIN Datainput 6Inputs serial data at the rising edge of the shift clock, starting from
the low order bit.
DOUT Data output 5Output 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 9Initializes 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 Clockinput 8Reads 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.
VEE Pull-down level 27 VDD-35 V max.
IC203: PT2399 (ECHO PROCESSOR)
Block diagram

1-7
XL-SV205GD
Pin configuration
IC201/IC202,U5/U6: BA4558 (OP-AMP)
Pin configuration Pin description
Pin Function
1A Output
2A-Input
3A+Input
4V-
5B+Input
6B-Input
7B Output
8V+
Pin description
Pin No. Pin Name I/O Description
1VCC -Analog supply voltage input
2REF -Analog reference voltage (=1/2Vcc)
3AGND -Analog ground
4DGND -Digitalground
5CLK_O OSystem clock output pin
6VCO IFrequency adjustment pin
7CC1 -Current control 1
8CC0 -Current control 0
9OP1-OUT OOP amplifier 1 output
This pin can be used as modulated integrator by connecting capacitor.
10 OP1-IN IOP amplifier 1 input
This pin can be used as demodulated integrator by connecting capacitor.
11 OP2-IN IOP amplifier 2 input
This pin can be used as demodulated integrator by connecting capacitor.
12 OP2-OUT OOP amplifier 2 output
This pin can be used as modulated integrator by connecting capacitor.
13 LPF2-IN ILow pass filter 2 input pin
14 LPF2-OUT OLow pass filter 2 output pin
15 LPF1-OUT OLow pass filter 1 output
16 LPF1-IN ILow pass filter 1 input

1-8
XL-SV205GD
U1: CL680 (MPEG-1 DECODER)
Block diagram
Pin configuration
IC101: 7805 (REGULATOR)
Block diagram

1-9
XL-SV205GD
Pin configuration
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-IN1VDDMAX-OUT
HRDY -VDDMAX-OUT
HSEL VDDMAX-IN -
HINT VDDMAX-IN2VDDMAX-OUT
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
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

1-10
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 Datainput/
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

1-11
XL-SV205GD
U3: 27C010 (1MB EEPROM)
Block diagram
Pin configuration Pin description
I/O Pin Name Pin No. Description
-Vpp 1Voltage input for program erase
operations
IA16,A15,A12 2,3,4 Address input pins
IA7-A0 5-12 Address input pins
I/O D0-D2 13-15 Input/Outputpins
-GND 16 Ground
I/O D3-D7 17-21 Input/Outputpins
ICE 22 Chip enable (Active low)
IA10 23 Address input pins
IOE 24 Output enable (Active low)
IA11,A9,A8 25,26,27 Address input pins
IA13,A14,A17 28,29,30 Address input pins
IWE 31 Write enable bar (Active low)
-VCC 32 Power supply for device
operation (5V ± 10%)
U4: CS4338 (AUDIO DAC)
Block diagram

1-12
XL-SV205GD
U7: CXD3068Q (CD DSP)
Block diagram
Pin description

1-13
XL-SV205GD
Pin configuration
Pin description
Pin No. Pin Name I/O Description
1DVDD0-Digital power supply
2XRST ISystem reset. Reset when low.
3MUTE IMute input (Low: off, high : on)
4DATA ISerial data input from CPU
5XLAT ILatch input from CPU. Serial data is latched at the falling edge.
6CLOK ISerial data transfer clock input from CPU.
7SENS O1,0 SENSoutputtoCPU.
8SCLK ISENS serial data readout clock input.
9ATSK I/O 1,0 Anti-shock input/output
10 WFCK O1,0 WFCKoutput
11 XUGF O1,0 XUGF output. MNT0 or RFCK is output by switching with the command.
12 XPCK O1,0 XPCK output. MNT1 is output by switching with the command.
13 GFS O1,0 GFS output. MNT2 or XROF is output by switching with the command.
14 C2PO O1,0 G2PO output. MNT3 or GTOP is output by switching with the command.
15 SCOR O1,0 Outputs a high signal when either subcode sync S0 or S1 is detected.
16 C4M O1,0 4.2336MHz output. 1/4 frequency division output for V16M in CAV-W mode or variable
pitch mode.
17 WDCK O1,0 Word clock output. f=2Fs. GRSCOR is output by the command switching.
18 DVss0 - - DigitalGND.
19 COUT I/O 1,0 Track count signal I/O
20 MIRR I/O 1,0 Mirror signal I/O
21 DFCT I/O 1,0 Detect signal I/O
22 FOK I/O 1,0 Focus OK signal I/O
23 PWMI ISpindle motor external control input.
24 LOCK I/O 1,0 GFS is sampled at 460Hz; when GFC is high, this pin outputs a high signal. If GFS is low
eight consecutive samples, this pin outputs low. Input when LKIN=1.
25 MDP O1,Z,0 Spindle motor servo control output.
26 SSTP IDisc innermost track detection signal input.
27 FSTO O1,0 2/3 frequency division output for XTAI pin.
28 DVDD1- - Digital power supply.
29 SFDR O1,0 Sled drive output.
30 SRDR O1,0 Sled drive output.
31 TFDR O1,0 Tracking drive output.
32 TRDR O1,0 Tracking drive output.
33 FFDR O1,0 Focus drive output.

1-14
XL-SV205GD
Pin No. Pin Name I/O Description
34 FRDR O1,0 Focus drive output.
35 DVss1 - - DigitalGND.
36 TEST ITestnormally, GND
37 TES1 ITestnormally, GND
38 VC ICenter voltage input
39 FE IFocus error signal input
40 SE ISled error signal input
41 TE ITracking error signal input
42 CE ICenter servo analog input
43 RFDC IRF signal input
44 ADIO OAnalog Test No. connected
45 AVss0 - - AnalogGND
46 IGEN IConstant current input for operational amplifier
47 AVDD0- - Analog power supply
48 ASYO O1,0 EFM full-swing output. (low=Vss, high=VDD)
49 ASYI IAsymmetry comparator voltage input
50 RFAC IEFMsignal input
51 AVss1 - - AnalogGND
52 CLTV IMultiplier VCO1 control voltage input
53 FILO OAnalog Master PLL filter output (slave=digital PLL)
54 FILI IMaster PLL filter input
55 PCO O1,Z,0 Master PLL charge pump output
56 AVDD1- - Analog power supply
57 BIAS IAsymmetry circuit constant current input
58 VCTL IWide-band EFM PLL VCO2 control voltage input
59 V16M I/O 1,0 Wide-band EFM PLL VCO2 oscillation output. Serves as wide-band EFM PLL clock
input by switching with the command.
60 VPCO O1,Z,0 Wide-band EFM PLL change pump output
61 DVDD2- - Digital power supply
62 ASYE IAsymmetry circuit on/off (low=off, high=on)
63 MD2 IDigital Out on/off control (low=off, high=on)
64 DOUT O1,0 Digital Out output
65 LRCK O1,0 D/A interface. LR clock output. f=Fs
66 PCMD O1,0 D/A interface. Serial data output (two’s complement, MSB first)
67 BCK O1,0 D/A interface. Bit clock output
68 EMPH O1,0 Outputs a high signal when the playback disc has emphasis, and a low signal when
there is no emphasis.
69 XTSL ICrystal selection input. Low when the crystal is 16.9344MHz; high when it is
33.8688MHz.
70 DVss2 - - DigitalGND
71 XTAI ICrystal oscillation circuit input. When the master clock is input externally, input it from
this pin.
72 XTAO OCrystal oscillation circuit output.
73 SOUT O1,0 Serial data output in servo block.
74 SOCK O1,0 Serial data readout clock output in servo block.
75 XOLT O1,0 Serial data latch output in servo block.
76 SQCO O1,0 Sub-Q 80-bit, PCM peak or level data outputs. CD TEXT data output.
77 SQCK ISQCO readout clock input.
78 SCSY IGRSCOR resynchronization input.
79 SBSO O1,0 Sub-Q P to W serial output.
80 EXCK ISBSO readout clock input.

1-15
XL-SV205GD
Pin description
Pin No. Pin Name I/O Description
1AGCVTH -Reference level variable pin for RF level control. The reference level can be varied by the
external resistor.
2LD OAPC amplifier output pin.
3PD IAPC amplifier input pin.
4PD1 IInversion input pin for RF I-V amplifiers.
5PD2 IConnect these pins to the photodiodes A + C and B + D respectively. The current is supplied.
6VEE -//VEE pin
7FIInversion input pin for F and E I-V amplifiers
8EIConnect these pins to the photodiodes F and E respectively. The current is supplied.
9EI -Gain adjustment pin for I-V amplifier.
10 VC ODC voltage output pin of (Vcc + VEE)/2. Connect to GND for ±1.75 power supply; connect a
smoothing capacitor for single +3.5V Power supply.
11 TE OTracking error amplifier output pin. E-F signal is output.
12 FE_BIAS IBias adjustment pin for inverted side of focus error amplifier.
13 FE OFocus error amplifier output pin.
14 FRM IRF amplifier inverted side input pin. RF amplifier gain is determined by the resistor connected
between this pin and RFO pin.
15 RFOORF amplifier output pin.
16 RFIIThe RF amplifier output RFO is input with its capacitance coupled.
17 RFTC -External time-constant pin for RF level control.
18 AGCCONT IRF level control ON (limit level of 50%/30%)/OFF switching pin. OFF for Vcc, 30% for open or Vc
and 50% for VEE.
19 LD_ON IAPC amplifier ON/OFF switching pin. OFF for Vcc and ON for VEE.
20 Vcc Vcc pin
Pin configuration
U8: CXA2550N (RF AMPLIFIER)
Block diagram

1-16
XL-SV205GD
U10: 74HCU04 (HEX INVERTER)
Pin configuration
Pin description
Pin No. Pin Name Description
1BIASIN Input for Bias-amplifier
2OPIN1(+) Non inverting input for CH1 OP-AMP
3OPIN1(-) Inverting input for CH1 OP-AMP
4OPOUT1 Output for CH1 OP-AMP
5OPIN2(+) Non inverting input for CH2 OP-AMP
6OPIN1(-) Non inverting input for CH2 OP-AMP
7OPOUT2 inverting input for CH2 OP-AMP
8GND Substrate ground
9STBY1 Input for CH1/2/3 stand by control
10 PowVcc1 Vcc for CH1/2 power block
11 VO2(-) Inverted output of CH2
12 VO2(+) Non inverted output of CH2
13 VO1(-) Inverted output of CH1
14 VO1(+) Non inverted output of CH1
15 VO4(+) Non inverted output of CH4
16 VO4(-) Inverted output of CH4
17 VO3(+) Non inverted output of CH3
18 VO3(-) Inverted output of CH3
19 PowVcc2 Vcc for CH3/4 power block
20 STBY2 Input for CH4 stand by control
21 GND Substrate ground
22 OPOUT3 Output for CH3 OP-AMP
23 OPIN3(-) Inverting input for CH3 OP-AMP
24 OPIN3(+) Non inverting input for CH3 OP-AMP
25 OPOUT4 Output for CH4 OP-AMP
26 OPOUT4(-) Inverting input for CH4 OP-AMP
27 OPOUT4(+) Non inverting input for CH4 OP-AMP
28 PreVcc Vcc for pre block
U9: BA5983FM (BTL DRIVER)
Block diagram

JVC Asia Pte Ltd
101 Thomson Road, #28-04 United Squares, Singapore 307591
No (28206)
Printed in Japan
XL-SV205GD
200102(L)

3-1
XL-SV205GD
PARTS LIST
[XL-SV205GD]
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-
Exploded view diagram --------------------------------------- 3-2
Mechanical parts list ------------------------------------------- 3-3
Electrical parts list ---------------------------------------------- 3-4
Packing list --------------------------------------------------------- 3-8
Parts ordering form ---------------------------------------------3-9

3-2
XL-SV205GD
Exploded view diagram
Main unit exploded view diagram

3-3
XL-SV205GD
Mechanical parts list
Ref. Parts Number Description QTY.
1 620-300606-70 S-TAP.SCREWP-B3X6 A BZN +H 29
2 620-300610-70 S-TAP.SCREW P-B 3X10 A BZN +H 2
3 E4101-023001 SWITCHPOW KDC-A09 1
4 322-SV2001-01Y CUSHIONFOOTFRONT 2
5 207-323911-01R CABINETFOOTFRONT SV20 R 2
6 E3701-00L010C PCB AC SW 1
7 612-300212-10 S-TAP.SCREW WHR 3X12 A NIP+H 2
8 E3701-00L020-1 PCBMIC AMP SV205GD 65X50 HB 1
9 273-SV2001-01S KNOBECHO 3
10 E3701-00L010A PCB POWER SUPPLY 168X68 V0 1
11 E2301-237001 ICL7805CV 1
12 E5102-114001 TRANSFORMERPOWT57-0123008-10 EI57 1
13 620-400606-70 S-TAPSCREWP-B 4X6 8
14 459-SV2001-01 HOLDERMECH(1) 1
15 E4103-020001 SWITCH SLIDE LZ1-22A2 4410206199 1
16 459-SV2002-01 HOLDERMECH(2) 1
17 E7701-005001 MECHANISMVCDKSS-213V 1
18 211-SV2001-02S PANEL TRAY W/SILK SV20 S 1
19 402-SV2001-01 PANELREAR 1
20 E7801-006001 PCB ASSY HY-24AVER1.6 1
21 322-SV2002-01Y CUSHIONFOOTBACK 2
22 403-SV2001-01 CHASSISBOTTOM 1
23 610-260108-00 S-TAP.SCREW RND 2.6X8 B BZN +H 12
24 620-400605-90 S-TAPSCREWP-B 4X5 4
25 372-SV2001-01Y SPACERFLD10X10X4 2
26 E6201-019001 DISPLAYFLD 20U39118BAN 1
27 279-SV2002-01S BUTTONSPATIALIZER 1
28 279-SV2003-01S BUTTONPLAY 1
29 260-SV2001-01K WINDOWLENFLD 1
30 200-SV2001-01R PANELFRONT 1
31 286-SV2001-01S NAMEPLATE 1
32 279-SV2001-01S BUTTONPOWER 1
33 603-305005-00 MACH.SCREW TRS 3X5 BZN +H 2