Panasonic Quasar Omnivision PV-V4021-K Bedienungsanleitung

ORDER NO. MKE0101000C1

Video Cassette Recorder

PVQ-V201 / PV-V4021 / PV-V4021-K / VHQ-401 / VHQ-41M / PV-

V4511 / PV-V4521 / PV-V4521A / PV-V4521-K / VHQ-451 / PV-

V4611

SPECIFICATIONS

1. MODEL NUMBER INDICATION

Use Marks shown in the chart below to distinguish the different models included in this Service

Manual.

The Model number is indicated on the Model No. Label which is located on the rear side of the Cabinet.

Differences between PV-V4521 and PV-V4521A are as below.

- Cylinder Unit (Ref. No. 11)

- Grounding Plate Unit (Ref. No. 57)

- Screw (Ref. No. 430)

- Flexible Flat Cable (Ref. No. 718)

- Main C.B.A. (Ref. No. E10)

When ordering these, be sure to confirm the model number printed on the Model No. Label and order

the proper parts according to the replacement parts list.

2. 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 critical parts should be replaced

with manufacturer’s 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 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 personal injury from electrical shocks. It

will also protect 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 the chassis, 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, and the equipment should be repaired and rechecked

before it is returned to the customer.

Figure 1

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, some field-effect transistors and 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, which should

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 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. (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 to CATV system installer:

This reminder is provided to call the CATV system installer’s attention to Article 820-22 of the NEC

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

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

practical."

4. OPERATION GUIDE

5. SERVICE NOTES (PLEASE READ)

5.1. SERVICE NOTES

5.1.1. SIMPLIFIED FAULT FINDING DATA

(With clock model in F.I.P.)

Simplified Self-Diagnostic System facilitates finding the cause of the fault. A 4 digit fault code will be

displayed in F.I.P.

The Simplified Fault finding data is stored in the Memory IC (IC6005). This data is cleared after it is

displayed, and then the POWER button is pressed back on.

1. With power turned off, press VCR/TV button on VCR (for over 3

seconds if VCR is not 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

Fig. 1-3

Fig. 1-4

Fig. 1-5

Fig. 1-6

3. While pressing VCR/TV button on VCR with power turned off, press

any operation button on either VCR, or remote to detect that a key has

been pressed.

The 1st digit changes to "0" only when key is detected.

Fig. 1-7

4. When 1 to 4 listed in Lock code occurs, Lock data will be stored in the

EEPROM IC (Current data, Last Lock data, and the Last Lock data

before last). Lock data displayed in F.I.P. can be changed by pressing

CH DOWN button.

Fig. 1-8

Note:

1. Lock data will be kept after the AC Cord is unplugged.

2. When 1 to 4 listed in Lock code occurs for the first time, the VCR does

not go into VCR shut-off condition. If it occurs again within a minute,

the VCR goes into VCR shut-off condition. Then, the VCR stops and all

VCR function buttons except for power become non-operational.

(Without clock model in F.I.P.)

Simplified Self-Diagnostic System facilitates finding the cause of the fault. LED will light up or flash in

F.I.P.

The Simplified Fault finding data is stored in the Memory IC (IC6005). This data is cleared after it is

displayed, and then the POWER button is pressed back on.

1. With power turned off, press VCR/TV button on VCR (for over 3

seconds if VCR is not in shut off condition).

Fig. 2-1

2. Fault indication will be displayed in F.I.P. as shown.

Fig. 2-2

FIg. 2-3

3. When Lock indication occurs, Lock data will be stored in the EEPROM

IC (Current data, Last Lock data, and the Last Lock data before last).

Lock data displayed in F.I.P. can be changed by pressing CH DOWN

button.

Fig. 2-4

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