Panasonic NV-VP23-33 EC Schematic

ORDER NO.MAD0503001CE

DVD Player / Video Cassette Recorder

NV-VP23EG / NV-VP23EC / NV-VP23EP / NV-VP28EG / NV-

VP28EC / NV-VP33EG / NV-VP33EC / NV-VP33EB / NV-

VP33EBL / NV-VP33EP /

R4-MECHANISM

Colour

(K).......................Black Type

(S).......................Silver Type

SPECIFICATIONS

1. INTRODUCTION

This service manual contains technical information which will allow service personnel to understand and service this model. If the circuit is changed or modified, this information will be followed by supplementary service manual to be filed with original service manual.

Note: Adjustment procedures, Disassembly Procedures and Assembly Procedures for VCR Mechanism Chassis are separate volume from this service manual. Please refer to the service manual for R4 Mechanism Chassis for EURO model (MAD0403002C2).

Model No. Indication Mark NV-VP23EG 23EG NV-VP23EC 23EC NV-VP23EP 23EP NV-VP28EG 28EG NV-VP28EC 28EC NV-VP33EG 33EG NV-VP33EC 33EC NV-VP33EB 33EB NV-VP33EBL 33EBL NV-VP33EP 33EP

2. SAFETY PRECAUTIONS

2.1. GENERAL GUIDELINES

1. Be careful during removing metal parts, sharp edges.

2. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.

3. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

4. After servicing, make the following leakage current checks to

prevent the customer from being exposed to shock hazards.

2.1.1. LEAKAGE CURRENT COLD CHECK

1. Unplug the AC cord and connect a jumper between the two prongs on the plug.

2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the chassis, the reading should be between 1M and 5.2M . When the exposed metal does not have a return path to the chassis, the reading must be infinity.

Figure 1

2.1.2. LEAKAGE CURRENT HOT CHECK (See Figure 1)

1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.

2. Connect a 1.5k , 10 watts resistor, in parallel with a 0.15 F capacitor, between each exposed metallic part on the set and a good earth ground such as a water pipe, as shown in Figure 1.

3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor.

4. Check each exposed metallic part, and measure the voltage at each point.

5. Reverse the AC plug in the AC outlet and repeat each of the above measurements.

6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) may be used to make the hot checks, leakage current must not exceed 1/2 milliamp. In case a measurement is outside of the limits specified,

there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to the customer.

3. PREVENTION OF ELECTRO STATIC DISCHARGE

(ESD) TO 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 electro static discharge (ESD).

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap, 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 alminum foil, 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 as "anti-static (ESD protected)" can generate electrical charge sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges 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, aluminium 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.

unsichtbare

Lasereinheit

Strahlung

der

die

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. (Otherwise 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 (ESD) sufficient to damage an ES device).

4. PRECAUTION OF LASER DIODE

CAUTION: ACHTUNG:

This product utilizes a laser diode with the unit turned “on”, invisible laser radiation is emitted from the pickup lens. Wave length: 662 nm/785 nm Maximum output radiation power from pickup: 100

W/VDE. Laser radiation from the pickup lens is on a safety level, if following precautions are followed:

1.Do not disassemble the optical pickup unit,

since radiation from exposed laser diode is dangerous.

2.Do not adjust the variable resistor on the

pickup unit. It was already adjusted.

3.Recommend not to look at pickup lens. 3.Nicht in die Fokussierlinse blicken.

4.Do not look at the focus lens using optical

instruments.

Dieses Produkt enthält eine Laserdiode. Im eingeschalteten Zustand wird Laserstrahlung von der Lasereinheit ausgestrahlt. Wellenlänge: 662 nm/785 nm Maximale Strahlungsleistung der /VDE. Die Strahlung der eingeschalteten ungefährlich, wenn folgende Punkte beachtet werden:

1.Die Lasereinheit nicht zerlegen, da die der freigelegten Laserdiode gefährlich ist.

2.Den werksseitig justierten Einstellregler Lasereinheit nicht verstellen.

4.Auch nicht mit optischen Instrumenten in Fokussierlinse blicken.

4.1. ABOUT LEAD FREE SOLDER (PbF)

This model uses lead free solder (PbF). For repair use only lead free handsolder. Caution:

Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 70~F (30 - 40~C) higher. Please use a high temperature soldering iron. In case of the soldering iron with temperature control, please set it to 700 +/-20~F (370 +/-10~C). Pb free solder will tend to splash when heated too high (about 1100~F/ 600~C). When soldering or unsoldering, please completely remove all of the solder on the pins or solder area and be sure to heat the soldering points with the Pb free solder until it melts enough.

5. PREVENTION OF STATIC ELECTRICITY DISCHARGE

The laser diode in the traverse unit (optical pickup) may brake down due to static electricity of clothes or human body. Use due caution to electrostatic breakdown when servicing and handling the laser diode.

5.1. GROUNDING FOR ELECTROSTATIC BREAKDOWN PREVENTION

Some devices such as the DVD player use the optical pickup (laser diode) and the optical

pickup will be damaged by static electricity in the working environment. Proceed servicing works under the working environment where grounding works is completed.

5.1.1. WORKTABLE GROUNDING

1. Put a conductive material (sheet) or iron sheet on the area where the optical pickup is placed, and ground the sheet.

5.1.2. HUMAN BODY GROUNDING

1. Use the anti-static wrist strap to discharge the static electricity form your body.

5.1.3. HANDLING OF OPTICAL PICKUP

1. To keep the good quality of the optical pickup maintenance parts during transportation and before installation, the both ends of the laser diode are short-circuited. After replacing the parts with new ones, remove the short circuit according to the correct procedure. (See this Technical Guide.)

2. Do not use a tester to check the laser diode for the optical pickup. Failure to do so will damage the laser diode due to the power supply in the tester.

6. GENERAL DESCRIPTION

6.1. OPERATING INSTRUCTIONS

6.2. SERVICE CAUTION

6.2.1. REPLACING IC6002/EEPROM

When the EEPROM: IC6002 is replaced, applicable model code, option code and electrical adjustment data will not be available. Therefore, enter and/or adjust the necessary data after replacing IC6002 by referring following

procedure. STEP1.REPLACE THE IC6002

1. Remove the PCB with Mechanism unit by referring the Disassembly procedure.

2. Disconnect the AC plug and replace the IC6002.

STEP2.INPUT THE MODEL & OPTION CODE

1. Set up the applicable model code and option code by ordering the following table.

PROCEDURE F.I.P. DISPLAY

Turn on the Service Mode

1.Press the FF key and the EJECT key simultaneously for more than 3 seconds.

Activate the Service Mode 2

2.While keep placing FF key, press the EJECT key in twice.

Activate the Entering Mode.

3.Press the EJECT key for more than 3 seconds.

Set the Mode 2.

4.Press the CH UP key in twice.

Display the Setting Code.

5.Press the POWER Button to turn the power on.

(Colon starts

Enter the Model and Option Code.

6.Service Screen is displayed on the monitor.

7.Set the applicable Model and Option code by using REW, PLAY, STOP and FF keys on the Remote Controller. (See Fig.S1 & S2)

Exit from Service Mode.

8.Press the POWER Button to turn the power off.

9. Press FF and EJECT keys simultaneously in 6 times.

(Normal Indication)

flashing)

Fig. S1 Service Screen Sample for NV-VP23EP

Fig. S2 Model Code & Option Code

NOTE: Since all electrical adjustments data is still not available, perform the Electrical Adjustment continuously.

6.2.2. CYLINDER UNIT REPLACEMENT

NOTE:

Replacing only Upper Cylinder unit of R4 Mechanism can not be performed, as securing of RT gap is impossible out of factory, please replace the cylinder by whole Cylinder Unit. The Compatibility Adjustment should be performed after replacement of the DD Cylinder Unit.

1. Remove the Mechanism Unit from Main PCB / Chassis referring to "Disassembly Procedure".

2. Unlock 2 locking tabs on a side to release the Cylinder Flat Cable as shown.

CAUTION:

Handle the Cylinder Flat Cable with care. When it damaged, you should replace whole Cylinder unit.

3. Remove the RED screw and GOLD screw to disassemble the Cylinder Unit.

NOTE:

When reassembling, perform the steps in the reverse order, and perform the COMPATIBILITY ADJUSTMENT certainly after CYLINDER UNIT REPLACEMENT.

6.2.3. ATTENTION FOR REPLAYING THE DD CYLINDER

1. Put the gloves on your hands.

2. Turn the DD Cylinder Unit over.

3. Insert the Flat Cable into the Flat Cable Holder

4. Insert the Flat Cable Holder to the DD Cylinder Unit.

5. The "COMPATIBILITY ADJUSTMENT" should be performed after the replacement of the DD Cylinder Unit.

NOTE:

In case that you have inserted the Flat Cable Holder

(FPC Holder) to the DD Cylinder Unit before inserting the Flat Cable (Flexible card) into the Flat Cable Holder. Pushing stopper portion of the Flat Cable Holder with a small minus screw driver, remove the Flat Cable Holder while paying attention for not to scratch the DD Cylinder and not to break the Head Chip as shown below.

6.2.4. FLAT CARD CABLE INSTALLATION

When installing the Flat Card Cable on the connector, install the Flat Card Cable with the cable contacts facing the connector contacts.

6.3. REMOVAL OF CASSETTE TAPE

When the cassette tape could not be uninstalled from an electrical malfunction, there are two ways to remove a cassette tape.

1. Removal by compulsory unloading. A. Press FF and EJECT button simultaneously for more than 3

seconds and set the Service Mode to 7.

B. Press STOP button in order to unload the mechanism.

(Pay attention to tape slack) Service Mode Indication: 7 0L 00 (STOP) 7 0L A2 (EJECT)

2. Removal by manual operation by rotating the Loading Motor with the batteries. A. Disconnect the AC plug, and remove the Top Panel and the

Front Panel by referring to the Disassembly Procedures.

B. Connect one batterie (9V spec.) to the Loading Motor in series

for supplying 9V to rotate the Loading Motor.

C. Stop unloading just before unloading would be completed.

D. Then the tape becomes slack.

E. Rotate the S-Reel by a small minus screwdriver to remove the

slack tape.

F. Then unload again to remove the cassette tape.

3. Removal by manual operations after uninstalling the mechanism. A. Disconnect the AC plug remove the Top Panel, Front Panel and

the Mechanism by referring to the Disassembly Procedures.

B. Remove the Screw (S1) and remove the Loading Motor both.

C. Rotate the Main Cam Gear counter-clockwise until just before

the unloading would be completed.

D. Rotate the Capstan Motor clockwise to remove the slack tape.

E. Rotate the Main Cam Gear counter-clockwise again to remove

the cassette-tape.

F. Set the Position Switch to EJECT POSITION certainly.

G. Install the Loading Motor and tighten screw (S1).

6.4. SELF-DIAGNOSIS & SERVICE INFORMATION DISPLAY

Refer to the Service Manual for R4 Mechanism Chassis for EURO model (MAD0403002C2).

6.5. INTRODUCTION OF VIDEO / HEAD CLEANING CASSETTE /

(POLISHING TYPE)

1. We are pleased to introduce Panasonic Video Head Cleaning Cassette, VFK0923FT [for service purposes] and VFK0923FSE [ for end users] for all VHS/SVHS VCP and VCR.

2. These cleaning cassettes are exclusive removing the hard and sticky clogging on video heads.

3. These improve the efficiency of video head cleaning service and shortening cleaning time for end users.

VFK0923FT

(For Service usage) Type of Cassette Full VHS Cassette Cleaning Time 10 Seconds/Time Tape Length 20 m Usability in a Path 180 Times

VFK0823FSE

(For end users) Type of Cassette Full VHS Cassette Cleaning Time 10 Seconds/Time Tape Length 3.34 m Usability in a Path 30 Times

Note:

The tape material itself is the same in both types.

7. DISASSEMBLING THE CASING AND CHECKING PCBs

7.1. DISASSEMBLY PROCEDURE

7.2. CASING PARTS AND PCB POSITIONS

7.3. TOP PANEL

1. Unscrew the Screws.

7.4. FRONT PANEL UNIT

1. Unscrew the Screw.

2. Remove the Tabs.

Note:

When attaching Front Panel, in order to hook Cassette Door Opener Lever to Cassette Door, push up cassette door in the direction of arrow and insert a front panel.

7.5. FRONT JACK PCB UNIT

1. Unscrew the Screws.

2. Remove the Tabs.

7.6. FRONT SWITCH PCB UNIT

1. Release the Screws.

2. Remove the Tabs.

7.7. VIDEO MECHANISM UNIT

1. Unscrew the Screws.

2. Disconnect the Cylinder Connector (A).

3. Disconnect the A/C Head Connector (B).

4. Disconnect the Connector (C).

5. Disconnect the Loading Motor Connector (D).

6. Remove the VHS Mechansim Unit.

7.8. DVD MECHANISM UNIT

1. Unscrew the Screws.

2. Lift up the DVD Mechanism Unit.

3. Remove the Cables.

4. Remove the DVD Mechanism Unit.

5. Remove the Protection Foil.

7.9. MAIN PCB UNIT

1. Unscrew the Screws.

2. Release the Connectors.

3. Remove the Main PCB Unit.

7.10. POWER PCB UNIT

1. Unscrew the Screws.

2. Release the Connectors.

3. Remove the Power PCB Unit.

7.11. AV DECODER PCB UNIT

1. Unscrew the Screws.

2. Release the Connectors.

3. Remove the AV Decoder PCB Unit.

7.12. SERVICE POSITION

7.12.1. SERVICE POSITION OF THE AV MAIN PCB

7.12.2. SERVICE POSITION OF THE POWER SUPPLY PCB

7.12.3. SERVICE POSITION OF THE DECODER PCB AND TERMINAL PCB

7.12.4. SERVICE TOOLS AND EQUIPMENT

commercially

Application Name Number

Tilt adjustment DVD test disc DVDT-S15 or DVDT-S01

Hex wrench Available on sales route.

Inspection 1 Extension cable (13pins)

PS1301 (Power PCB) - P1001 (AV Main PCB)

2 Extension cable (19pins)

P8003 (AV Decoder PCB) - PS4301 (AV Main PCB)

3 Extension cable (12pins)

PP4801 (Front Jack PCB) - PS7501 (AV Main PCB)

4 Extension cable (9pins)

P8002 (AV Decoder PCB) - PS1302 (Power PCB)

DVD unit adjustment stand 1 VFK1727

Others Screw lock RZZ0L01

Grease 1 RFKXGAK152 Grease 2 RFKXPG641 Oil (1) RFKXGA1280

Confirmation CD test disc PVCD-K06 or any other

VCD test disc PVCD-K06 or any other

VFK1876

RFKZ0170

RFKZ0215

RFKZ0288

available disc

8. OPTICAL PICKUP SELF-DIAGNOSIS AND /

REPLACEMENT PROCEDURE

8.1. SELF-DIAGNOSIS

The optical pickup self-diagnosis function and tilt adjustment check function have been included in this unit. When repairing, use the following procedure for effective Self-diagnosis and tilt adjustment. Be sure to use the self-diagnosis function before replacing the optical pickup when "NO DISC" is displayed. As a guideline, you should replace the optical pickup when the value of the laser drive current is more than 55.

Note: Press the power button to turn on the power, and check the value within three minutes before the unit warms up. (Otherwise, the result will be incorrect.)

8.2. CAUTIONS TO BE USED BEFORE REPLACING THE OPTICAL PICKUP UNIT AND SPINDLE MOTOR ASSEMBLY

Before replacing the optical pickup unit and spindle motor assembly, check the total using

Display

hours

hours for each of them. The checking method is as follows:

Operating state & Key operation

Using hours of CD laser Press “PAUSE”, “FWD-SKIP” and “5” on the remote

control in this order while the unit is stopped

Using hours of DVD laser Press “PAUSE”, “FWD-SKIP” and “5” on the remote

control in this order while the unit is stopped

Using hours of SP motor

Resetting using hours of CD and DVD lasers (Simultaneous resetting)

Resetting using hours of the motor

Press “PAUSE”, “FWD-SKIP and “6” on the remote control in this order while the unit is stopped

Press “STOP”, “FWD-SKIP” and “5” on the remote control in this order while displaying Timer 1 data

Press “STOP”, “FWD-SKIP” and “6” on the remote control in this order while displaying Timer 2 data

T1_xxxx_yyyy yyyy: total displayed by figures (unit:

T1_xxxx_yyyy xxxx: total displayed by figures (unit:

T2_xxxx xxxx: total displayed by figures (unit:

T1_0000_0000

T2_0000

Cautions to be taken when replacing the optical pickup The optical pickup may break down due to the static electricity of human body. Take proper protection measures against static electricity before repairing the parts around the optical pickup. (See the page describing the PREVENTION OF STATIC ELECTRICITYDISCHARGE.)

1. Do not touch the areas around the laser diode and actuator.

2. Do not judge the laser diode with a tester. (The tester will be damaged easily.)

9. SELF-DIAGNOSIS FUNCTION AND SERVICE

MODES

9.1. SERVICE MODE TABLE 1

The service modes can be activated by pressing various button combination on the player and remote control unit.

Player buttons Remote control unit

Note

Diagnosis

Function

Display).

Optical

Tilt

Adjustment

the

ROM

program.

Optical

Replacement

Procedure.

Initializing

player.

buttons

PLAY (DVD)

OPEN/CLOSE

0 Displaying the UHF display Refer

Application

9.1. Self

PAUSE

SKIP/

SEARCH<<

OPEN/CLOSE

5 Jitter check, tilt adjustment

*Display shows J_xxx_yyy_zz "yyy" and "zz" shown to the right have nothing to do with the jitter value. "yyy" is the error counter, while "zz" is the focusdrive value. Refer to section 11.3. for Optical Pickup Tilt Adjustment Procedure.

6 Checking the region numbers and broadcast

system

7 Checking the program version Check

9 Lighting Confirmation Function of Display Tube

FUNCTIONS Checking the laser drive current Refer

PAUSE Writing the laser drive current value after

replacing the optical pickup (do not use for anything other than optical pickup replacement)

Initializing the DVD player (restoring factory preset settings)

Refer

11.3. Pickup

FLASH

10.8. Pickup

Refer

9.5. DVD

9.2. DVD SELF DIAGNOSTIC FUNCTION-ERROR CODE

Error Code Error Content Additional error explanation

error)

the

error

violation

(

error

occured

incompatible

data

defect

series

U11 Focus error H01 Tray loading error H02 Spindle servo error (Spindle servo, DSC SP motor, CLV servo H03 Traverse servo error H04 Tracking servo error H05 Seek error H06 Power error Cannot switch off the power because of

and system computer communication H07 Spindle motor drive error F103 Illegal highlight Position Big possibility of disc specification

highlight display F498 No communication between Front

Micro Computer and Main Micro Computer after power on

F499 No response from Main Micro

Main Micro Computer hangs up

Computer when key code is sent from Front Micro Computer to Main Micro

Computer F4FF Force initialize failure (time out) F500 DSC error DSC stops in the occurence of servo error

focus error, etc)

F501 DSC not Ready DSC-system computer communication

(Communication failure caused by idling F502 DSC Time out error Similar disposal as F500 F503 DSC communication Failure Communication error (result error

communication command was sent) F505 DSC Attention error Similar disposal as F500 F506 Invalid media Disc is flipped over, TOC unreadable,

disc F600 Access failure to management

information caused by demodulation

Operation stopped because navigation

accessible caused by the demodulation

error

F601 Indeterminate sector ID requested Operation stopped caused by the request

abnormal ID data F602 Access failure to LEAD-IN caused by

LEAD IN data unreadable

demodulation error

F603 Access failure to KEYDET caused by

Access failure to CSS data of disc

demodulation error F610 ODC abnormality No permission for command execution F611 6626 QCODE don’t read Error Access failure to seek address in CD F612 No CRC OK for a specific time Access failure to ID data in DVD series F630 No reply to KEY DET enquiry (for internal use only) F631 CPPM KEY DET is not available till the

FILE terminal

(CPPM file system is unreadable caused scratches)

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