Prology DVD-555 Service manual

PROLOGY DVD-555

SERVICE MANUAL

V1.0

SPECIFICATION

Power requirement 12V DC car battery

(negative earth)
Operating temperature -10 +65
Strage temperature -20 +70
Operational humidity 10% 80%
Atmosphere pressure 860mbar 1060mbar

TABLE OF CONTENTS CAR DVD PLAYER

1.GENERAL

2.BLOCK DIAGRAM

3.ELECTRICAL TROUBLE SHOOTING GUIDE

4.PRINTED CIRCUIT

5.ELECTRICAL PARTS LIST

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.
NAUTHORIZED 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 REPAIR SHOP.

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 METAL SURFACES 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.

SUBJECT GRAPHIC SYMBOLS

PLACE THIS PROBE
ON EACH EXPOSED
METAL PART

SUBJECT: X-RADIATION

1.BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PERSONNEL COVER THE
SUBJECT OF X-RADIATION. THE ONLY POTENTIAL SOURCE 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 MAY CAUSE 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 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.

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 LOCATE THE CAUSE OF EXCESSIVE VOLTAGE.

6. REFER TO HV. B+ AND SHUTDOWN ADJUSTMENT PROCEDURES DESCRIBED IN THE
APPROPRIATE SCHEMATIC AND DIAGRAMS(WHERE USED).

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 FACTORY REPLACEMENT 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 HEATED AIR
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
EQUIVALENT THICKNESS 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.

The lightening flash with arrowhead symbol, within an equilateral
triangle, is intended to alert the user to the presence of uninsulated
"dangerous voltage" within the product's enclosure that may be of
sufficient magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert
the user to the presence of important operating and maintenance
(servicing) instructions in the literature accompanying the appliance.

2

SERVICING PRECAUTIONS

CAUTION : Before servicing the DVD covered by this service
data and its supplements and ADDENDUMS, read and
follow the SAFETY PRECAUTIONS NOTE : 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:

General Servicing Precautions

1. Always unplug the DVD DC power cord from the DC

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.

Caution : A wrong part substitution or incorrect polarity

installation of electrolytic capacitors may result in an
explosion hazard.

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.
Unless specified otherwise in this service data, lubrication
of contacts is not required.

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. Immediately before handling any emiconductor
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.

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.

4. Do not defeat any plug/socket B+ voltage interlocks with
which 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

.

6. Always connect test instrument ground lead to the
appropriate ground before connection the test
instrument positive lead. Always remove the test
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 : Accessible Conductive Parts including Metal
panels, input terminals, Earphone jacks, etc.

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
conductive foam, aluminum foil, or comparable
conductive material.)

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

DV-100 BLOCK

DIAGRAM

LCD/KEY PCB

LCD

LCD/KEY

DRIVER

UPD16431

16 PIN CON
POWER D8V
MCU
FPSW
REMOTR
ENCODER

TUNER

FAE347

PLL

TC9257

T9V 2CH 100mV

B+ ACC

CDC

A9V A9V A12V

BA3121

2CH 1V

A9V VDD-5V

AUX-IN

BA3121

2CH 1V

A5V

MAIN

PCB

AUDIO D/A

CS4340

2CH 1V

POWER

SUPPLY

B+ ACC

B+ 4CH POWER OUT

AUDIO DSP

TEA6320

PRE AMP

2X4558

4CH 2V 4X25W

POWER AMP

TDA7381

2CH LINE OUT 2V

P5V

MCU

TMP87CM21D

LEVEL

3V3 TO 5V

2CH DIGITALL AUDIO

A9V

AUDIO

SW

A12V

PRE AMP

4558

2CH DVD REAR OUT

2V

SHARP

HPD-50

RF-PREAMP

SP3721

FOCUS TRACK

EPROM

29C011

ALI DSP

SERVO

M5705

SDRAM

16M

DC12V

ATAPI INTERFACE

POWER

SUPPLY

DC1V8
DC3V3

DC5V

CIRRUS MPEG

CS98100

24PIN CON

MCU

DG AUDIO

SW

VIDEO BP

FILTERS

10PIN CON
POWER D12V D5V
LOAD MOTOER

2CH CVBS

MECHA
MOTOR

SLED

LOAD

DRIVER

BA5945

SPINDER MOTOR

DRIVER

BA6849

DVD-C01 SC

8M FLASH

29LV800

SDRAM

64M

EEPROM

AT24C02A

A Power Circuit abnormal (For main board)

Is the inout of Q419 DC 12V?

Is 40pin of U201 VDD-5V?

Is 26pin of U201 DC 12V?

Is the out of Q404 DC 12V?

START

NO

Check the fuse.

YES

NO

Check Q401 ZD402 L401 and peripheral
components.

YES

NO

Check ACC and ACC fuse.
Check ZD401 and peripheral components.

YES

NO

Check Q404，Q408

YES

Is the output of U404 DC 5V?

YES

Is the out of Q402 P12V?

YES

Is the out of U402 DC 8V?

YES

Is 2pin of U406 DC 3.3V?

YES

Is 2pin of U407 DC 1.8V?

NO

NO

NO

NO

NO

Check U404 and peripheral components.

Check Q402 Q406 and peripheral
components.

Check ZD439 and peripheral components.

Check U406 and peripheral components.

Check U407 and peripheral components.

YES

Normal

B Display abnormal (For main board)

START

YES

Does the screen appear?

YES

Is display normal?

YES

Normal

NO

NO

Check if the 14pin voltage of DC8V?
Check if the 16pin voltage of DC5V?
Check the key board according to key schematic.

Check the key board according to key
schematic.

C IN/OUT abnormal (For main board)

The disc can’t be injected

YES

Is 6pin of BA6951 DC 12V?

YES

Is voltage between 5 and 10 pin of BA6951
DC 4.6V after eject-key being pressed?

YES

Is voltage between 11 and 12 pin of J203 at
S&D board DC 4.5V?

NO

NO

NO

Check L2

1.Check CN401 at S&D board,connection between
it and MCU.

2.Check R204,BA6951.

Check connection between main board and S&D
board.

YES

Normal

D Logo display abnormal (For S&D board(Servo and Decoder board))

Is voltage for CN401 normal?

YES

No Logo display?

YES

Having picture,no color or color

disappeared during playback.

YES

Normal

NO

Check connection of main board and S&D
board.

NO

Check S&D board.

NO

Check decoder part and change Y101.

E Read disc abnormal (For S&D board)

DISC IN

Focus on?

YES

Is laser normal?

YES

Does the disc turn?

YES

Can TOC be read?

NO

NO

NO

NO

Refer to Focus abnormal.

Refer to laser abnormal.

Refer to disc turn abnormal.

Refer to TOC abnormal.

YES

Normal

F Video abnormal (For S&D board)

NO

Only Logo display

YES

YES

Having picture,no color or color

disappeared during playback.

NO

YES

Having picture,but picture

disappeared during playback.

Check the connection of U102 and ZR36776.

Check decoder part and change Y101.

Check decoder part and change Y101.

NO

Normal

G Audio abnormal (For main board)

Is the rear channel normal?

NO

Refer to rear out abnormal

YES

Is the front channel and

sbw channel normal?

YES

Is the power amplifier normal?

YES

Normal

NO

NO

Refer to front out abnormal

Check U301 and peripheral components