REPLACEMENT PARTS LIST . ....................29-42
............................6-21
Page 2
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS
CAUTION: DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY AND
NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT
MANUFACTURER'S APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT
ONLY VOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR
ANY RESULTING PROPERTY DAMAGE OR USER INJURY.
SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE
THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY CHECKS
AND SERVICING GUIDELINES. TO DO OTHERWISE, INCREASES THE RISK OF
POTENTIAL HAZARDS AND INJURY TO THE USER.
WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTECTION
FROM A.C. LINE SHOCK.
SAFETY CHECKS
AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRECTED, A CHECK
SHOULD BE MADE OF THE FOLLOWING.
SUBJECT: FIRE & SHOCK HAZARD
1. BE SURE THAT ALL COMPONENTS ARE POSITIONED IN SUCH A WAY AS
TO AVOID POSSIBILITY OF ADJACENT COMPONENT SHORTS. THIS IS
ESPECIALLY IMPORTANT ON THOSE MODULES WITCH ARE
TRANSPORTED TO AND FROM THE REPAIRSHOP.
2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVE DEVICES SUCH AS
INSULATORS, BARRIERS, COVERS, SHIELDS, STRAIN RELIEFS, POWER
SUPPLY CORDS, AND OTHER HARDWARE HAVE BEEN REINSTALLED PER
ORIGINAL DESIGN. BE SURE THAT THE SAFETY PURPOSE OF THE
POLARIZED LINE PLUG HAS NOT BEEN DEFEATED.
3. SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLE COLD
SOLDER JOINTS, SOLDER SPLASHES OR SHARP SOLDER POINTS. BE
CERTAIN TO REMOVE ALL LOOSE FOREIGN PARTICLES.
4. CHECK FOR PHYSICAL EVIDENCE DF DAMAGE OR DETERIORATION TO
PARTS AND COMPONENTS, FOR FRAYED LEADS AND DAMAGED
INSULATION (INCLUDING A.C. CORD), AND REPLACE IF NECESSARY
FOLLOW ORIGINAL LAYOUT, LEAD LENGTH AND DRESS.
5. NO LEAD OR COMPONENT SHOULD TOUCH A RECEIVING TUBE OR A
RESISTOR RATED AT 1 WATT OR MORE. LEAD TENSION AROUND
PROTRUDING METALSURFACES MUST BE AVOIDED.
6. ALL CRITICAL COMPONENTS SUCH AS FUSES. FLAMEPROOF RESISTORS,
CAPACITORS, ETC. MUST BE REPLACED WITH EXACT FACTORY TYPES,
DO NOT USE REPLACEMENT COMPONENTS OTHER THAN THOSE
SPECIFIED OR MAKE UNRECOMMENDED CIRCUIT MODIFICATIONS.
7. AFTER RE-ASSEMBLY OF THE SET, ALWAYS PERFORM AN A.C. LEAKAGE
TEST ON ALL EXPOSED METALLIC PARTS OF THE CABINET, (THE
CHANNEL SELECTOR KNOB, ANTENNA TERMINALS. HANDLE AND
SCREWS) TO BE SURE THE SET IS SAFE TO OPERATE WITHOUT DANGER
OF ELECTRICAL SHOCK. DO NOT USE A LINE ISOLATION TRANSFORMER
DURING THIS TEST, MAKE SURE TO USE AN A.C. VOLTMETER. HAVING
5000 OHMS PER VOLT OR MORE SENSITIVITY, IN THE FOLLOWING
MANNER; CONNECT A 1500 OHMS 10 WATT RESISTOR, PARALLELED BY
A.15 MFD. 150V A.C. TYPE CAPACITOR BETWEEN A KNOWN GOOD EARTH
GROUND (WATER PIPE, CONDUIT, ETC.) AND THE EXPOSED METALLIC
PARTS, ONE AT A TIME. MEASURE THE A.C. VOLTAGE ACROSS THE
COMBINATION OF 1500 OHM RESISTOR AND 15 MFD CAPACITOR.
REVERSE THE A.C. PLUG AND REPEAT A.C. ANY VOLTAGE
MEASUREMENTS FOR EACH EXPOSED METALLIC PART. VOLTAGE
MEASURED MUST NOT EXCEED 75 VOLTS R.M.S. THIS CORRESPONDS
TO 0.5 MILLIAMP A.C. ANY VALUE EXCEEDING THIS LIMIT CONSTITUTES A
POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY.
GOOD EARTH GROUND
SUCH AS THE WATER
PIPE, CONDUIT, ETC.
PLACE THIS PROBE
ON EACH EXPOSED
METAL PART
SUBJECT GRAPHIC SYMBOLS
THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN
EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE
PERSONNEL TO THE PRESENCE OF UNINSULATED "DANGEROUS
VOLTAGE" THAT MAY BE OF SUFFICIENT MAGNITUDE TO
CONSTITUTE A RISK OF ELECTRIC SHOCK.
THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS
INTENDED TO ALERT THE SERVICE PERSONNEL TO THE
PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE
LITERATURE.
SUBJECT: X-RADIATION
1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PERSONNEL
COVER THE SUBJECT OF
X-RAYS IN CURRENT T.V. RECEIVERS IS THE PICTURE TUBE. HOWEVER,
THIS TUBE DOES NOT EMIT X-RYS WHEN THE HIGH VOLTAGE IS AT THE
FACTORY SPECIFIED LEVEL. THE PROPER VALUE IS GIVEN IN THE
APPLICABLE SCHEMATIC. OPERATION AT HIGHER VOLTAGES MAYCAUSE A
FAILURE OF THE PICTURE TUBE OR HIGH VOLTAGE SUPPLY AND, UNDER
CERTAIN CIRCUMSTANCES, MAY PRODUCE RADIATION IN EXCESS OF
DESIRABLE LEVELS.
2. ONLY FACTORY SPECIFIED C.R.T ANODE CONNECTORS MUST BE USED.
DEGAUSSING SHIELDS ALSO SERVE AS AN X-RAY SHIELD IN COLOR SETS,
ALWAYS RE-INSTALL THEM.
3. IT IS ESSENTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN
ACCURATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRATION OF
THE METER SHOULD BE CHECKED PERIODICALLY AGAINST A
REFERENCE STANDARD, SUCH AS THE ONE AVAILABLE AT YOUR
DISTRIBUTOR.
4. WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLY, THERE IS
NO POSSIBILITY OF AN
CHASSIS IS SERVICED, THE BRIGHTNESS SHOULD BE RUN UP AND DOWN
WHILE MONITORING THE HIGH VOLTAGE WITH A METER TO BE CERTAIN
THAT THE HIGH VOLTAGE DOES NOT EXCEED THE SPECIFIED VALUE AND
THAT IT IS REGULATING CORRECTLY. WE SUGGEST THAT YOU AND YOUR
SERVICE ORGANIZATION REVIEW TEST PROCEDURES SO THAT VOLTAGE
REGULATION IS ALWAYS CHECKED AS A STANDARD SERVICING
PROCEDURE AND THAT THE HIGH VOLTAGE READING BE RECORDED ON
EACH CUSTOMER'S INVOICE.
5. WHEN TROUBLESHOOTING AND MAKING TEST MEASUREMENTS IN A
PRODUCT WITH A PROBLEM OF EXCESSIVE HIGH VOLTAGE AVOID BEING
UNNECESSARILY CLOSE TO THE PICTURE TUBE AND THE HIGH VOLTAGE
SUPPLY DO NOT OPERATE THE PRODUCT LONGER THAN IT IS NECESSARY
TO LOCATETHE CAUSE OF EXCESSIVE VOLTAGE.
6. REFER TO HV. B+ AND SHUTDOWN ADJUSTMENT PROCEDURES
DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS(WHERE
USED).
X-RADIATION. THE ONLY POTENTIAL SOURCE OF
X-RADIATION PROBLEM. EVERY TIME A COLOR
SUBJECT: IMPLOSION
1. ALL DIRECT VIEWED PICTURE TUBES ARE EQUIPPED WITH AN INTEGRAL
IMPLOSION PROTECTION SYSTEM, BUT CARE SHOULD BE TAKEN TO
AVOID DAMAGE DURING INSTALLATION, AVOID SCRATCHING THE TUBE. IF
SCRATCHED REPLACE IT.
2. USE ONLY RECOMMENDED FACTORYREPLACEMENT TUBES.
SUBJECT: TIPS ON PROPER INSTALLATION
1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS. CUBBYHOLE OR
CLOSELY FITTING SHELF SPACE, OVER OR CLOSE TO HEAT DUCT, OR IN
THE PATH OF HEATEDAIR FLOW.
2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIO
INSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIATORS
WHERE STEAM LEAKAGE IS A FACTOR, ETC.
3. AVOID PLACEMENT WHERE DRAPERIES MAY OBSTRUCT REAR VENTING.
THE CUSTOMER SHOULD ALSO AVOID THE USE OF DECORATIVE
SCARVES OR OTHER COVERINGS WHICH MIGHT OBSTRUCT VENTILATION.
4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMERCIAL
MOUNTING KIT, MUST FOLLOW THE FACTORY APPROVED MOUNTING
INSTRUCTIONS. A PRODUCT MOUNTED TO A SHELF OR PLATFORM MUST
RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENTTHICKNESS IN SPACERS)
TO PROVIDE ADEQUATE AIR FLOW ACROSS THE BOTTOM. BOLTS OR
SCREWS USED FOR FASTENERS MUST NOT TOUCH ANY PARTS OR
WIRING. PERFORM LEAKAGE TEST ON CUSTOMIZED INSTALLATIONS.
5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A PRODUCT ON
SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS
PROPERLY SECURED.
6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON ITS
MOUNTING TO THE CART CAUTION THE CUSTOMER ON THE HAZARDS OF
TRYING TO ROLL A CART WITH SMALL CASTERS ACROSS THRESHOLDS
OR DEEP PILE CARPETS.
7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STAND WHICH
HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES, INC. FOR USE
WITH THEIR SPECIFIC MODEL OF TELEVISION RECEIVER OR
GENERICALLY APPROVED FOR USE WITH TV'S OF THE SAME OR LARGER
SCREEN SIZE.
8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS. EXPLAIN
THAT A FOREST OF EXTENSIONS SPROUTING FROM A SINGLE OUTLET
CAN LEAD TO DISASTROUS CONSEQUENCES TO HOME AND FAMILY.
2
Page 3
SERVICING PRECAUTIONS
CAUTION : Before servicing the DVD covered by this
service data and its supplements and ADDENDUMS, read
andfollowthe:if
unforeseen circumstances create conflict between the
following servicing precautions and any of the safety
precautions in this publications, always follow the safety
precautions.
Remember Safety First:
SAFETYPRECAUTIONSNOTE
General Servicing Precautions
1. Always unplug the DVD AC power cord from the AC
power source before:
(1) Removing or reinstalling any component, circuit board,
module, or any other assembly.
(2) Disconnection or reconnecting any internal electrical
plug or other electrical connection.
(3) Connecting a test substitute in parallel with an
electrolytic capacitor
Caution :
polarity installation of electrolytic capacitors may
result in an explosion hazard.
A wrong part substitution or incorrect
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged
easily by static electricity. Such components commonly are
called Electrostatically Sensitive (ES) Devices. Examples of
typical ES devices are integrated circuits and some field
effect transistors and semiconductor chip components.
The following techniques should be used to help reduce the
incidence of component damage caused by static electricity.
1.Immediatelybeforehandlinganysemiconductor
component or semiconductor-equipped assembly, drain
off any electrostatic charge on your body by touching a
known earth ground. Alternatively, obtain and wear a
commercially available discharging wrist strap device,
which should be removed for potential shock reasons
prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface
such as aluminum toil, to prevent electrostatic charge
buildup or exposure of the assembly.
2. Do not spray chemicals on or near this DVD or any of its
assemblies.
3. Unless specified otherwise in this service data, clean
electrical contacts by applying an appropriate contact
cleaning solution to the contacts with a pipe cleaner,
cotton-tipped swab, or comparable soft applicator.
Unlessspecifiedotherwiseinthisservicedata,
lubrication of contacts is not required.
4. Do not defeat any plug/socket B+ voltage interlocks with
witch instruments covered by this service manual might
be equipped.
5. Do not apply AC power to this DVD and/or any of its
electrical assemblies unless all solid-state device heat
sinks are correctly installed.
3. Use only a GROUNDED-tip soldering iron to solder or
unsolder ES devices.
4. Use only an anti-static solder removal device. Some
solder removal devices not classified a "anti-static" can
generate electrical charges sufficient to damage ES
devices.
5. Do not use freon-propelled chemicals. These can
generate electrical charge sufficient to damage ES
devices.
6. Do not remove a replacement ES device from its
protective package until immediately before you are
ready to install it. (Most replacement ES devices are
packaged with leads electrically shorted together by
conductivefoam,aluminumfoil,orcomparable
conductive material.)
6. Always connect test instrument ground lead to the
appropriategroundbeforeconnectionthetest
instrumentpositivelead.Alwaysremovethetest
instrument ground lead last.
Insulation Checking Procedure
Disconnect the attachment plug trom the AC outlet and turn
the power on. Connect an insulation resistance meter(500V)
to the blades of the attachment plug. The insulation
resistance between each blade of the attachment plug and
accessible conductive parts (Note 1) should be more than
1M ohm.
Note 1 :
panels, input terminals, Earphone jacks, etc.
Accessible Conductive Parts including Metal
7.Immediately before removing the protective material
from the leads of a replacement ES device, touch the
protective material to the chassis or circuit assembly
into which the device will be installed.
Caution : Be sure no power is applied to the chassis or
circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged
replacement ES devices. (Normally harmless motion
such as the brushing together of your clothes fabric or the
lifting of your foot from a carpeted floor can generate
static electricity sufficient to damage an ES device.)
3
Page 4
4
Page 5
FM+AM
TFCE1E
115
1
125
A750 KEY ASS'Y
14
11
14
A750 MIC
ASS'Y
XP3
1
25
2
XP2
115
XP10
110
A750 AMP ASS'Y
XP13
125
3
1
1
DSM750
6
DECODER
1
ASS'Y
1
6
25
24
112
XP5
1
12
1
12
7
XP1
1
110
XP404
12
6
XP402
1
AD750
PO WER
ASS'Y
12
XP403
1
4
12
14
8
10
13
12
5
9
124
KHL-232B
1
LOADING
6
ASS'Y
5
Page 6
IC INTRODUCTION
D1890 PIN ASSIGNMENTS
Pin Num bersPIN NAMETypeDescription
QFP100 and LQ FP100
RF Flag Interface
13DEFECTDigital OutputFlag of bad data output status
RF SIO interface
14SLCKDigital InputRF serial clock input
15SDENDigital InputRF serial data enable
16SDATADigital IORF serial data IO
11RSTDigital inputReset (active high)
12XCK16MDigital input16.9M Hz for verification
RF
40DVDAAnalog inputDVD RF signal input A
41DVDBAnalog InputDVD RF signal input B
42DVDCAnalog InputDVD RF signal input C
43DVDDAnalog InputDVD RF signal input D
38DVDRFINAnalog InputDVD RF signal input RFIN
39DVDRFIPA nalog InputDVD RF s ignal input RFIP
53CDAAnalog InputCD RF signal input A
54CDBAnalog InputCD RF signal input B
55CDCAnalog InputCD RF signal input C
56CDDAnalog InputCD RF signal input D
61OSPAnalogO ffset c ancellation capacitor connecting
60OSNAnalogOffset cancellation capacitor c onnecting
86RFOPAnalog outputRF positive output
85RFONAnalog outputRF negative output
59RFGCAnalogRF VGA control
TRACKING ERROR
88DPFNAnalogDPD amplifier negative input
87DPFOAnalogDPD amplifier output
23IRAnalogDPD reference resister connec ting
17DPDMUTEDigital inputDPD m ute control input
83TNIAnalog Input3 beam satellite PD signal input
82TPIA nalog Input3 beam satellite PD signal input
97TEOA nalog O utputTracking error output
FOCUSING ERROR&RF LEVEL&CENTRAL SERVO SIGNAL
64CDFNIAnalog InputCD focus ing error negative input
TSD[3:0]38,37,36,33OAudio transm it s erial data port.
MCLK39I/OAudio m aster clock for audio DAC.
TBCK40I/OAudio transm it bit clock.
SPDIF DOB
41O
M
S/PDIF (IEC958) Format Output.
RSD45IAudio receive serial data.
RWS46IAudio receive frame synch.
RBCK47IAudio receive bit clock.
APLLCAP48IAnalog PLL Capacitor.
XIN49ICrystal input.
XOUT50OCrystal output.
DMA[11:0]66:61,58:53ODRAM address bus .
DCAS#69OColumn address s trobe, ac tive low.
OOutput enable, active low.DOE#
70
DSCK EN
DW E#71ODRAM write enable, active low.
DRAS[2:0]#74:72ORow address strobe, active low.
Clock Enable, ac tive low.
I
14
Page 15
NameNumberI/ODefinition
DB[15:0]96:93,90:85,82:77I/ODRAM data bus.
DCS[1:0]#97,100OSDRAM chip select [1:0], active low
DQM101OData input/output mask.
DSCK102OClock to SDRAM.
DCLK105IClock Input (27 MHz)
YUV[7:0]115:113,110:106O8-bit YUV output.
PCLK2XSC
2X pixel clock.
116I/O
N
PCLKQSCN117I/OPixel clock.
Verticalsynchforscreenvideo
VSYNCH#1 18I/O
interface, programmable for rising or
falling edge, active low.
Horizontalsyncforscreenvideo
HSYNCH#1 19I/O
interface, programmable for rising or
falling edge, active low.
HD[15:0]141:140,137:131,128:122OHost data bus
HCS1FX#152OHost select 1.
HCS3FX#153OHost select 3.
HIOCS16#151IDevice 16-bit data transfer.
HA[2:0]158,155:154I/OHost address bus.
Peripheralprotectionvolt age.See
VPP159I
App Note 2.
Host w rite/DCI Interface Acknowledge
HWR#/DCI_ACK#
149I,O
Signal, active low.
HRD#/DCI_CLK
O,
150
Host read/DCI Interface Clock.
O
HD[15:0]141:140,137:131,128:122I/OHost data bus.
HWRQ#142OHost write request.
HRDQ#143OHost read request.
HIRQ144I/OHost intrrupt.
HRST#145OHost reset.
HIORDY146IHost I/O ready
AUX[7:0]169:165,162:160I/OAuxiliary ports.
LOE#170ODevice output enable, active low.
LCS[3:0]#176:173OChip select [3:0], active low.
LD[15:0]197:194,191:185,182:178I/ODevice data bus.
LWRLL#198ODevice write enable, active low.
LWRHL#199ODevice write enable, active low.
NC37,38,42,203:202No Connect pins. Leave open.
15
Page 16
VS3811 BLOCK DIAGRAM
16
Page 17
CS4955 PIN ASSIGNMENTS
PIN NAMENUMBERTYPEDEFINITION
V[7:0]8,7,6,5,4,3,2,1INDigital video data inputs
CLK29IN27MHz input clock
PADR16INAddress enable line
XTAL-IN15INSub-carrier crystal input
XTAL-OUT14OUTSub-c arrier crystal output
HSYNC/CB10I/OActive low horizontal sync, or composite blank signal
VSYNC11I/OActive low vertical sync
FIELD/CB9OUTVideo field ID. Selectable polarity or composite blank
RD27INHost parallel port read strobe, active low
WR28INHost parallel port write strobe, active low
PDAT[7:0]19,20,21,22,23,24,25,26I/OHost parallel port/general purpose I/O
SDA32I/OI C data
SCL33INI C clock input
CVBS44CURRENTComposite video output
Y48CURRENTLuminance analog output
C47CURRENTChrominance analog output
R39CURRENTRed analog output
G40CURRENTGreen analog output
B43CURRENTBlue analog output
VREF38I/OInternal voltage reference output external reference input
SET37CURRENTDAC current set
TTXDAT30INTeletext data input
TTXRQ31OUTTeletext request output
INT12OUTInterrupt output, active high
RESET34INActive low master RESET
TEST13INTest pin. Ground for normal operation
VAA36,41,46PS+5V or +3.3Vsupply(must be same as VDD)
GNDD18PSGround
VDD17PS+5V or +3.3Vsupply(must be same as VAA)
GNDA35,42,45PSGround
VCP3PWRPLL Power Supply (+5v)
NC4N/ANo connection
MCKO5OUTBuffered clock output of crystal oscillator
ML6INLatch for serial control data
MC7INClock for serial control data
MD8INData for serial control
RSTB9IN
ZERO10OUT
VOUTR11OUTRight Channel Analog Output
AGND12GNDAnalog Ground
VCC13PWRAnalog Power Supply(+5v)
VOUTL14OUTLeft Channel Analog Output
CAP15Common pin for analog output amplifiers
BCKIN16INBit clock for clocking in the audio data
DIN17INSerial audio data input
LRCIN18INLeft/Right Word Clock. Frequency is equal to fs
NC19N/ANo connection
RES20N/AReserved for factory use, do not connect
VDD21PWRAnalog Power Supply(+5v)
DGND22GNDDigital Ground
PGND23GNDPLL Ground
XTO24OUTCrystal oscillator output
Note:(1)Schmitt t riger input with internal pull-up resistors.
(2)Schmitt triger input.
System Clock Out. This output is 256fs or 384fs.System clock generated
by the internal PLL.
Reset input. When this pin is low, the digital filters and modulator are held
in reset
Zero Data Flag. This pin is low when the input data is continuously zero for
more than 65.535 cycles of BCKIN