Panasonic PVD4742 - DVD/VCR DECK User manual

ORDERNO. MKE0201800C1
B3
DVD/VCR DECK
PV-D4742
SPECIFICATIONS
1

2002 Matsushita Kotobuki Electronics Industries Ltd. All rights
reserved. Unauthorized copying and distribution isaviolation of
law.
1. SAFETY PRECAUTIONS
GENERALGUIDELINES
1. IMPORTANTSAFETY NOTICE
There are special components used inthisequipment which are
important for safety. These parts are marked byinthe
SchematicDiagrams, CircuitBoard Layout, Exploded Viewsand
Replacement Parts List. Itisessential that these critical parts
shouldbe replaced with manufacturer’sspecified parts to prevent
shock, fire or other hazards. Donot modifythe original design
without permission of manufacturer.
2. AnIsolation Transformer shouldalwaysbe used during the
2

servicing of DVDVCR whose chassisisnot isolated from the AC
power line. Use atransformer of adequate power rating as this
protects the technician from accidents resulting inpersonal injury
from electrical shocks. Itwill also protect DVDVCR from being
damaged byaccidental shorting that mayoccur during servicing.
3. When servicing, observe the original lead dress. Ifashort circuit
isfound, replace all parts which have been overheated or
damaged bythe short circuit.
4. After servicing, see to itthat all the protective devices such as
insulation barriers, insulation papers shields are properly
installed.
5. After servicing, make the following leakage current checks to
prevent the customer from being exposed to shock hazards.
LEAKAGE CURRENTCOLD CHECK
1. Unplug the AC cord and connect ajumper between the two
prongs on the plug.
2. Measure the resistance value, with an ohmmeter, between the
jumpered AC plug and each exposed metalliccabinet part on the
equipment such as screwheads, connectors, control shafts, etc.
When the exposed metallicpart has areturn path to the chassis,
the reading shouldbe between 1M and 5.2M . When the
exposed metal does not have areturn path to the chassis, the
reading must be infinity.
LEAKAGE CURRENTHOTCHECK
(See figure 1.)
1. Plug the AC cord directlyinto the AC outlet. Donot use an
isolation transformer for thischeck.
2. Connect a1.5k , 10 Wresistor, inparallel with a0.15 F
capacitor, between each exposed metallicpart on the set and a
good earth ground, as showninfigure 1.
3. Use an AC voltmeter, with 1k /Vor more sensitivity, to measure
the potential across the resistor.
4. Check each exposed metallicpart, and measure the voltage at
each point.
3

5. Reverse the AC plug inthe AC outlet and repeat each of the above
measurements.
6. The potential at anypoint shouldnot exceed 0.75 VRMS. A
leakage current tester (Simpson Model 229 or equivalent) maybe
used to make the hot checks. Leakage current must not exceed 1/
2mA. Incase ameasurement isoutside of the limits specified,
there isapossibilityof ashock hazard, and the equipment should
be repaired and rechecked before itisreturned to the customer.
Figure 1
1.1. LASERPRODUCT
CLASS I LASER PRODUCT
-Thisequipment iscertified to complywith DHHSRules 21 CFR
Chapter 1, Subchapter Jineffect as of date of manufacture. (Only
for U.S.A.)
This equipment is classifiedas a Class I (Class 1) level LASER Product and there is no
hazardous LASER radiation withthe safetyprotection.
Caution:
Use of controlsor adjustments or performance of procedures other
than those specified hereinmayresultinhazardous radiation
exposure.
Danger:
The serviceman shouldnot remove the cover of drive unitand
shouldnot service because the drive unitisanon- serviceable
parts. Please check that the labels.
Nevertouchthe internal parts inordertoavoidEXPOSURE TO VISIBLE LASER RADIATION.
Unplug the AC powercordtothe equipment whenopening the top cover.
Whenthe powerswitchis On, do not place youreyes close tothe front panel opening dooror
the otheropenings tolook intothe interiorunit.
LASER Specification
Class I level A LASER Product (Class 1 level A LASER Product)
Wave Length:
647 -677 nm (at DVD)/ 775 -815 nm (at CD)
4

Laser Power:
Nohazardous radiation isemitted with the safetyprotection.
1.2. PRECAUTIONOFLASERDIODE
CAUTION:
Thisunitutilizes aclass III alaser. Visiblelaser radiation isemitted
from the optical pickup lens when the unitisturned on:
1. Donot look directlyinto the pickup lens.
2. Donot use optical instruments to look at the pickup lens.
3. Donot adjust the preset variableresistor on the optical pickup.
4. Donot disassemblethe optical pickup unit.
5. Ifthe optical pickup isreplaced, use the manufactures specified
replacement pickup only.
6. Use of control or adjustment or performance of procedures other
than those specified hereinmayresultinhazardous radiation
exposure.
2. PREVENTION OF ELECTRO-STATIC DISCHARGE
(ESD) TO ELECTROSTATICALLY SENSITIVE (ES)
DEVICES
Some semiconductor(solidstate) devices canbe damagedeasilybystatic electricity. Such
components commonlyare calledElectrostaticallySensitive (ES) Devices. Examples of typical
ES devices are integratedcircuits, some field-effect transistors and semiconductor"chip"
components. The following techniques shouldbe usedtohelpreduce the incidence of
component damage causedbyelectrostatic discharge (ESD).
1. Immediatelybefore handling anysemiconductor component or
semiconductor-equipped assembly, drainoff anyESDon your
bodybytouching aknownearth ground. Alternatively, obtainand
wear acommerciallyavailabledischarging ESDwrist strap, which
shouldremove electrostaticcharge for potential shock reasons
prior to applying power to the unitunder test.
2. After removing an electrical assemblyequipped with ES devices,
place the assemblyon aconductive surface such as aluminum
foil, to prevent electrostaticcharge buildup or exposure of the
assembly.
3. Use onlyagrounded-tipsoldering iron to solder or unsolder ES
5

devices.
4. Use onlyan antistaticsolder removal device. Some solder
removal devices not classified as "antistatic(ESDprotected)" can
generate electrical charge sufficient to damage ES devices.
5. Donot use freon-propelled chemicals. These can generate
electrical charges sufficient to damage ES devices.
6. Donot remove areplacement ES device from its protective
package until immediatelybefore you are readyto install it. (Most
replacement ES devices are packaged with leads electrically
shorted together byconductive foam, aluminum foil or
comparableconductive material).
7. Immediatelybefore removing the protective material from the
leads of areplacement ES device, touch the protective material to
the chassisor circuitassemblyinto which the device will be
installed.
CAUTION:Besure no power isapplied to the chassisor circuit,
and observe all other safetyprecautions.
8. Minimize bodilymotions when handling unpackaged replacement
ES devices. (Otherwise harmless motion such as the brushing
together of your clothes fabricor the lifting of your foot from a
carpeted floor can generate staticelectricity(ESD)sufficient to
damage an ES device).
"NOTE toCATV systeminstaller:
This reminderis providedtocall the CATV systeminstaller’s attention toArticle 820-22 of the
NEC that provides guidelines forpropergrounding and, inparticular, specifies that the cable
ground shall be connectedtothe grounding systemof the building, as close tothe point of
cable entryas practical."
3. OPERATION GUIDE
4. SERVICE NOTES (PLEASE READ)
4.1. SERVICENOTES
4.1.1. SIMPLIFIED FAULT FINDING DATA
SimplifiedSelf-Diagnostic Systemfacilitates finding the cause of the fault. A 3-digit fault code
will be displayedinF.I.P.
The SimplifiedFault finding data is storedinthe MemoryIC (IC6005). This data is clearedafterit
is displayed, and thenthe POWER button is pressedback on.
6

1. With power turned off, press CH DOWNbutton on VCR (for over 3
seconds ifVCR isnot inshut off condition).
Fig. 1-1
2. Faultcode (3-digitnumber) will be displayed inF.I.P. as shown.
Fig. 1-2
Fig. 1-3
Fig. 1-4
7

Fig. 1-5
3. When 1to 4listed inLock code occurs, Lock data will be stored in
the MemoryIC(latest Lock data only).
Note:
1. Lock data will be kept after the AC Cord isunplugged.
2. When 1to 4listed inLock code occurs for the first time, the VCR
does not go into VCR shut-off condition. Ifitoccurs againwithina
minute, the VCR goes into VCR shut-off condition. Then, the VCR
stops and all VCR function buttons except for power become non-
operational.
3. Lock data will be cleared at the first power on operation after Lock
code isdisplayed inFIP.
4.1.2. USAGE SCREEN MODE
Function displayedon the TV monitor:
-the total elapsed "Cylinder rotation" time (inhours)
-the total elapsed "DVDPlay"time (inhours)
1. With power turned and no cassette, press CH DOWNbutton on
VCR and 7keyon remote together.
(The USAGESCREENwill be displayed on the TV Monitor.)
Fig. 2
8

Note:
1. After replacing the Cylinder Unit, press COUNTERRESET button
on remote inthismode. OnlyTotal elapsed "Cylinder rotation"
time (inhours) will be cleared to 0.
2. To release from Usage Screen Mode, press anyoperation button
on VCR or insert acassette tape inthismode. The VCR will return
to normal operation mode.
4.1.3. EEPROM IC (IC6005), MAIN C.B.A. REPLACEMENTNOTE
Afterreplacing EEPROM IC (IC6005) orMainC.B.A., be sure toperform the "PG SHIFTER
ADJUSTMENT" inELECTRICALADJUSTMENTprocedures.
4.1.4. GROUNDING FOR ELECTROSTATIC BREAKDOWN
Prevention
1. Human bodygrounding
Use the antistaticwrist strap to discharge the staticelectricity
from your body.
2. Work tablegrounding
Put aconductive material (sheet) or steel sheet on the area where
the optical pickup isplaced and ground the sheet.
Caution:
The staticelectricityof your clothes will not be grounded through
the wrist strap. So take care not to let your clothes touch the optical
pickup. Fig. 3
4.1.5. DVD DECODER C.B.A. REPLACEMENTNOTE
Afterreplacing the DVD DecoderC.B.A. orEEPROM IC (IC8001), confirm the Firmware version
9

of DVD using Self-Diagnostic function. If the version is different thanthat indicatedon the
Firmware Disc, update it using the Firmware Disc. Referto"HOW TO UPDATE THE FIRMWARE
OF DVD."
4.1.6. METHOD FOR EJECTING THE DVD TRAY MANUALLY
1. Insert aStraightened Paper Clipor similar object into the Eject
hole.
2. Press itgently, and then pull the Trayfullyout.
Fig. 4
4.1.7. SELF-DIAGNOSTIC TESTFUNCTION FOR DVD UNIT
This unit has a Self-Diagnostic function whichdetects a problemormalfunction withinthe unit
and displays its corresponding Errorcode on the TV Screen.
Note:
If, after approx. 30 seconds, aunitset to DVDmode automatically
switches to VCR mode, there islikelyaproblem with the DVD
Decoder C.B.A. (IC8000, IC8100, IC8200, etc.)
HowtoenterDVD Self-Diagnostic mode
1. Connect aTV Monitor.
2. Insert aDVDdisc into the DVDUnit.
3. Set the unitto DVDmode. Then, press STOPbutton to stop
playback.
Note:
Donot let aDVDplayduring DVDSelf-Diagnosticmode.
4. Press and holdSTOPbutton on the VCR and 9keyon the remote
together with no cassette inserted. The unitwill enter the DVDSelf
-Diagnosticmode. Fig. 5-1
10

5. Press "1" keyon the remote control. The DVDSelf-Diagnostic
Test function will start automatically.
Fig. 5-2
6. After afew minutes (approx. 1~5minutes), the check results will
appear on the TV screen.
-Ifno error isdetected, "COMPLETED"will appear as shownin
Fig. 5-3. Besure to press Power OFF to end. Then, press
Power ONagainand remove the DVDdisc from the Tray.
Fig. 5-3
-Ifsome error isdetected, a2-digitfor Error Code will appear
as showninFig. 5-4. Fig. 5-4
Fig. 5-5
11

4.1.8. HOW TO UPDATE THE FIRMWARE OFDVD
It is possible toupdate the firmware version of the DVD Drive and the DVD Decoderusing each
Firmware Disc forDVD Drive and DVD Decoder.
Howtoupdate the firmware of DVD Drive:
1. Confirm the firmware version of DVDDrive. Refer to "SELF-
DIAGNOSTIC TEST FUNCTION FOR DVD UNIT."
2. Set the unitto DVDmode.
3. Press OPEN/CLOSE button to open the tray. Then, place the
Firmware Disc for DVDDrive inthe tray.
4. Close the tray. Updating will beginautomatically.
5. After approx. 1minute, the traywill open automatically.
Note:
Ifthe trayhas still not opened after 3minutes or Error Indication
appears, updating was unsuccessful. Inthiscase, repeat above
steps from step 1.
6. Remove the Firmware Disc from the tray. Then, disconnect the AC
Plug. (The traywill not close.)
7. Connect the AC Plug and turn on the power. Then, reset all VCR
memory. Refer to "HOW TO RESET ALL MEMORY FUNCTIONS."
Howtoupdate the firmware of DVD Decoder:
1. Confirm the firmware version of DVDDecoder. Refer to "SELF-
DIAGNOSTIC TEST FUNCTION FOR DVD UNIT."
2. Set the unitto DVDmode.
3. Press OPEN/CLOSE button to open the tray. Then, place the
Firmware Disc for DVDDecoder inthe tray.
4. Close the tray. Updating will beginautomatically.
5. After approx. 1minute, the traywill open automatically.
Note:
12

Ifthe trayhas still not opened after 3minutes or Error Indication
appears, updating was unsuccessful. Inthiscase, repeat above
steps from step 1.
6. Remove the Firmware Disc from the tray. Then, disconnect the AC
Plug. (The traywill not close.)
7. Connect the AC Plug and turn on the power. Then, reset all VCR
memory. Refer to "HOW TO RESET ALL MEMORY FUNCTIONS."
CAUTION:
1. Donot unplug the AC Cord during updating.
2. Donot press anybuttons during updating.
4.1.9. SERVICE POSITION
4.1.9.1. Service Position
CAUTION:
HOTCIRCUIT(Primarycircuit) exists on the MainC.B.A.
Use extreme care to prevent accidental shock when servicing.
4.1.9.1.1. Service Position (1)
Fig. 7-1
4.1.9.1.2. Service Position (2)
Fig. 7-2-1
13

Note:
1. Itispossiblethat the S-Tab SW. maynot work correctlyinService
Position (2). (Recording can not be done). Inthiscase, short the S-
Tab SW. Pins on the foil side of the MainC.B.A. to turn thisSW.
on. Fig. 7-2-2
2. Place the tape between the Cassette UpAss'yand MainC.B.A. to
get astability.
4.1.9.1.3. Service Position (3)
InService Position (3), the DVD DecoderC.B.A. withExtension Cable (LSUA0034) X3 and
ConnectorCable (IDE Cable) (Not supplied) canbe performed.
Fig. 7-3-1
14

1. Remove the DVDUnitand the DVDDecoder C.B.A.
Note:
Remove the original Connector Cable(IDE) from the DVDUnit.
(The original Connector Cable(IDE) isnot used inthisposition.)
2. Connect the Connector Cable(Power) and the Connector Cable
(IDE) to the DVDUnitfrom the DVDDecoder C.B.A.
3. Connect the 3Extension Cables as follows:
-With Extension Cable(LSUA0034): P8001 on the DVD
Decoder C.B.A. to P1501 on the Power SupplyC.B.A.
-With Extension Cable(LSUA0034): P8002 on the DVD
Decoder C.B.A. to P3001 on the MainC.B.A.
-With Extension Cable(LSUA0034): P8003 on the DVD
Decoder C.B.A. to P6002 on the MainC.B.A.
4. Place the DVDUnitand DVDDecoder C.B.A. as shown.
Fig. 7-3-2
15

4.1.10. HOTCIRCUIT
Primarycircuit exists on the MainC.B.A.
This circuit is identifiedas "HOT" on the C.B.A. and inthe Service Manual. Use extreme care to
prevent accidental shock whenservicing.
4.1.11. SERVICE MODE
Inordertoinhibit detection of the Supply& Takeup PhotoTransistors, Reel Sensor, and
CylinderLock, press and holdFF button and CH DOWN buttons on VCR togetherover5
seconds inpoweroff condition.
Fig. 8-1
The powercomes on and the unit goes intoservice mode.
Inthis mode, Mechanismmovement canbe confirmed. Whenremoving Cassette UpAss’y, it
canbe confirmedwithout a cassette.
To release fromthis mode, press POWER button off ordisconnect AC Plug.
4.1.12. TRACKING CENTER MODE (TRACKING FIX ATCENTER)
Insert the Cassette tape. Set the unit intoService Mode. Playback the Cassette tape. Press
PLAY button inPlayback mode. "TRACKING CENTER" will be displayedon the TV monitor.
Inthis mode, the tracking is fixedat center. (Autotracking and manual tracking functions are
not operational.)
Fig. 8-2
16

To release fromthis mode, press PLAY orSTOP button.
4.1.13. CAUTION FOR INSTALLATION OFFRONTPANELASS’Y
CAUTION:
Opener Lever maybe damaged when Front Panel Ass’yisinstalled,
with Cassette Door-Lidof Front Panel Ass’yand Opener Lever of
Cassette UpAss’yset incorrectly.
Install the Front Panel Ass’yas follows:
1. Swing the Cassette Door-Lidall the wayopen until the Cassette
Door tab clears the Opener Lever.
2. Make sure that all locking tabs are aligned properly. Then, press
the Front Panel straight in.
Fig. 9
4.1.14. METHOD FOR LOADING/UNLOADING OFMECHANISM
4.1.14.1. (Manual Method)
Turnthe Loading Gearclockwise (forloading) orcounterclockwise (forunloading) using
needlenose pliers etc.
Note:
Donot use thismethod ifMechanism isjammed or locked.
17

Fig. 10-1
4.1.14.2. (Electrical Method)
Apply+10.0 V DC PowerSupplytothe Loading Motorterminals.
Loading
DC + toPortion "a," DC - toPortion "b"
Unloading
DC - toPortion "a," DC + toPortion "b"
CAUTION:
Before applying DC Power Supply, be sure to cut the Motor Leads
with acutter, etc.
Otherwise, the Loading Motor Drive IC(IC2501) maybe damaged.
Fig. 10-2
4.1.14.2.1. WHEN LOADING WITHOUTA CASSETTE
Whenloading without a cassette, pushPortion "a" on the HolderUnit of Cassette UpAss’yso
that the Leverclearthe First Taband Second Tab.
Fig. 10-3
18

4.1.15. HOW TO REMOVE A JAMMED TAPE
CAUTION:
Wiper Arm Unitmaybe damaged or its spring maybe out of place
when the jammed tape isremoved byforce.
Remove a jammedtape as follows:
4.1.15.1. Manual Method
Whena tape jamis encountered, check the tape loading condition and use the following
procedure toremove a tape jam.
Fig. 11-1
Method -1:
1. Move the Pinch Roller Unitout byunhooking the Pinof Pinch Arm
Unitso that the Pinch Roller isseparated from the Capstan Rotor
Unitshaft. Fig. 11-2
19

2. Remove the tape from the tape path.
3. Rewind the tape into the cassette byrotating the Center Clutch
Unitcounterclockwise.
4. Unhook Spring (A)of the Drive Rack Arm.
5. Remove Screw (A).
6. Lift the Cassette UpAss’y. Whilepulling the Cassette UpAss’y
out far enough so that itclears the Drive Rack Arm, slide the Drive
Rack Unitas indicated bythe arrow to remove the cassette tape
from the Cassette UpAss’y.
7. Check the cause of mechanical troubleand repair.
Fig. 11-3
Method -2:
1. Rotate Loading Motor counterclockwise with needlenose pliers,
etc. so that the Pinch Roller isseparated from the shaft of the
Capstan Rotor Unit.
2. Perform Step 2through Step 7of Method -1.
Method -3:
20