Panasonic DoubleFeature PV-D4734S Manuale utente

ORDER NO. MKE0403002C1

DVD / VCR DECK

PV-D4734S / PV-D4744 / PV-D4744S / PV-D4754S / PV-D4734S-K

/ PV-D4744S-K / PV-D4754S-K

For servicing the R4-Mechanism Chassis for PV-Model, Please refer to

the R4-Mechanism-Chassis-for-PV-Model Service Manual (Order No.

MKE0401000C1).

SPECIFICATIONS

1. SAFETY PRECAUTIONS

GENERAL GUIDELINES

1. IMPORTANT SAFETY NOTICE

There are special components used in this equipment which are

important for safety. These parts are marked by in the Schematic

Diagrams, Circuit Board Layout, Exploded Views and Replacement

Parts List. It is essential that these criticalparts should be replaced

with manufacturerís specified parts to prevent shock, fire or other

hazards. Do not modify the original design without permission of

manufacturer.

2. An Isolation Transformer should always be used during the servicing

of DVD VCR whose chassis is not isolated from the AC power line.

Use a transformer of adequate power rating as this protects the

technician from accidents resulting in personalinjury from electrical

shocks. It will also protect DVD VCR from being damaged by

accidental shorting that may occur during servicing.

3. 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.

4. After servicing, see to it that 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 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 thechassis, the reading

should be between 1 M and 5.2 M . When the exposed metal does

not have a return path to the chassis, the reading must be infinity.

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 1.5 k , 10 W resistor, in parallel with a 0.15 F capacitor,

between each exposed metallic part on the set and a good earth

ground, as shown in Figure 1.

3. Use an AC voltmeter, with 1 k /V 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 V 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

mA. In case a measurement is outside of the limits specified, there is a

possibility of a shock hazard, andthe equipment should be repaired

and rechecked before it is returned to the customer.

Figure 1

1.1. LASER PRODUCT

CLASS I LASER PRODUCT

- This equipment is certified to comply with DHHS Rules 21 CFR Chapter

1, Subchapter J in effect as of date of manufacture. (Only for U.S.A.)

This equipment is classified as a Class I (Class 1) level LASER Product and there is no hazardous

LASER radiation with the safety protection.

Caution:

Use of controls or adjustments or performance of procedures other

than those specified herein may result in hazardous radiation exposure.

Danger:

The serviceman should not remove the cover of drive unit and should not service because the drive

unit is a nonserviceable parts. Please check that the labels.

Never touch the internal parts in order to avoid EXPOSURE TO VISIBLE LASER RADIATION.

Unplug the AC power cord to the equipment when opening the top cover.

When the power switch is On, do not place your eyes close to the front panel opening door or the

other openings to look into the interior unit.

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)

Laser Power: No hazardous radiation is emitted with the safety protection.

1.2. PRECAUTION OF LASER DIODE

CAUTION:

This unit utilizes a class III a laser. Visible laser radiation is emitted from

the optical pickup lens when the unit is turned on:

1. Do not look directly into the pickup lens.

2. Do not use optical instruments to look at the pickup lens.

3. Do not adjust the preset variable resistor on the optical pickup.

4. Do not disassemble the optical pickup unit.

5. If the optical pickup is replaced, use the manufactures specified

replacement pickup only.

6. Use of control or adjustment or performance of procedures other than

those specified herein may result in hazardous radiation exposure.

2. 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, some field-effect transistorsand semiconductor "chip" components.

The following techniques should be used to help reduce the incidence of component damage caused

by electrostatic 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, whichshould

remove electrostatic charge 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 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 antistatic solder removal device. Some solder removal

devices not classified as "antistatic (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, aluminum foil or comparableconductive 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. (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).

“NOTE toCATV system installer:

This reminder is provided to call the CATV system installerís attention to Article 820-40 of the NEC

that provides guidelines for proper grounding and, in particular, specifies that the cable ground shall

be connected to the grounding systemof the building, as close to the point of cable entry as

practical.”

3. ABOUT LEAD FREE SOLDER (PbF)

Distinction of PbF PCB:

PCBs (manufactured) using lead free solder will have a printing on the PCB.

(Please refer to figures.)

CAUTION:

- Pb free solder has a higher melting point than standard solder;

Typically the melting point is 50°F - 70°F (30°C - 40°C) higher.

Please use a soldering iron with temperature control and adjust it to

700°F ± 20°F (370°C ± 10°C).

In case of using high temperature soldering iron, please be carefull not

to heat too long.

- Pb free solder will tend to splash when heated too high (about 1100°F/

600°C).

- All products with the printed circuit board with printing must be

serviced with lead free solder.

When soldering or unsoldering, completely remove all of the solder

from the pins or solder area, and be sure to heat the soldering points

with the lead free solder until it melts sufficiently.

Recommendations

Recommended lead free solder composition is Sn96.5 Ag3.0 Cu0.5.

4. SERVICE NOTES (PLEASE READ)

4.1. SELF-DIAGNOSIS INDICATION DISPLAY

This VCR has a self-diagnosis and display function.

1. Keep pressing CH DOWN Button on VCR for over 3 seconds in Power

off condition, or keep pressing CH DOWN button on VCR in Shut off

condition.

Fig. 1-1

2. Fault code (4-digit number) will be displayed in F.I.P. as shown.

Fig. 1-2

4.1.1. Explanation of I 2 C bus transmission number

The condition of I2C bus transmission befor shut off is displayed.

Fig. 1-3

4.1.2. Explanation of VCR mode code number

The condition of VCR Mode before shut off is displayed.

Fig. 1-4

4.1.3. Explanation of Error code number

The detecting condition and movement of mechanism is displayed.

Fig. 1-5

4.1.3.1. Reason of Ejection

When an error code is 80, the reason of ejection is displayed on the F.I.P. of “TIMER”, “VCR” and

“HiFi”.

Fig. 1-6

Note:

The location of above indications is different for each type of F.I.P..

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