Toshiba D-R4SU Bedienungsanleitung

DVD VIDEO RECORDER

SERVICE MANUAL

Mar., 2005

FILE NO. 810-200531

D-R4SU

D-R4SC

D-KR4SU

DIGITAL VIDEO

PREPARATION OF SERVICING

Pickup Head consists of a laser diode that is very susceptible to external static electricity.

Although it operates properly after replacement, if it was subject to electrostatic discharge during replacement,

its life might be shortened. When replacing, use a conductive mat, soldering iron with ground wire, etc. to

protect the laser diode from damage by static electricity.

And also, the SI and IC are same as above.

Ground conductive

wrist strap for body.

Soldering iron

with ground wire

or ceramic type

Conductive mat The ground resistance

between the ground line

and the ground is less than 10

LASER BEAM CAUTION LABEL

When the power supply is being turned on, you may not remove this laser cautions label. If it removes, radiation of a laser

may be received.

·Manufactured under license from Dolby Laboratories. “Dolby” and the double-D symbol are trademarks of Dolby Laboratories.

·“DTS” and “DTS Digital Out” are trademarks of Digital Theater Systems, nc.

·Manufactured under license from QSound Labs, nc. U.S. patent Nos. 5,105,462, 5,208,860 and 5,440,638 and various foreign counterpart. Copyright

SAFETY NOTICE

SAFETY PRECAUTIONS

LEAKAGE CURRENT CHECK

Plug the AC line cord directly into a 12 V AC outlet (do

not use an isolation transformer for this check). Use an

AC voltmeter, having 5 W per volt or more sensitivity.

Connect a 15 W 1 W resistor, paralleled by a .15 mF

15 V AC capacitor between a known good earth ground

(water pipe, conduit, etc.) and all exposed metal parts of

cabinet (antennas, handle bracket, metal cabinet

screwheads, metal overlays, control shafts, etc.).

Measure the AC voltage across the 15 W resistor.

The test must be conducted with the AC switch on and

then repeated with the AC switch off. The AC voltage

indicated by the meter may not exceed .3 V. A reading

exceeding .3 V indicates that a dangerous potential

exists, the fault must be located and corrected.

Repeat the above test with the DVD VIDEO RECORDER

power plug reversed.

NEVER RETURN A DVD VIDEO RECORDER TO

THE CUSTOMER WITHOUT TAKING NECESSARY

CORRECTIVE ACTION.

READING SHOULD NOT EXCEED 0.3V

The lightning 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.

DVD VIDEO RECORDER AC VOLTMETER

(5000

per volt

or more sensitivity)

Good earth ground

such as a water pipe,

conduit, etc.

1500

10 W

0.15

F 150V AC

AC OUTLET

Test all exposed metal.

Voltmeter Hook-up for eakage Current Check

SECTION 2

PART REPLACEMENT AND ADJUSTMENT PROCEDURES

SECTION 3

SERVICING DIAGRAMS

1. CIRCUIT SYMBOLS AND

SUPPLEMENTARY EXPLANATION

1-1. Precau ions for Par Replacemen

1-2. Solid Resis or Indica ion

1-3. Capaci ance Indica ion

1-4. Induc or Indica ion

1-5. Waveform and Vol age Measuremen

1-6. O hers

2. PRINTED WIRING BOARD AND

SCHEMATIC DIAGRAM

3. BLOCK DIAGRAMS

3-1. Overall Block Diagram

4. CIRCUIT DIAGRAMS

4-1. Power Supply Circui Diagram

4-2. Fron Circui Diagram

4-2-1. Fron Jack Circui Diagram

4-2-2. Fron (LED) Circui Diagram

4-2-2. Fron (L) Circui Diagram

4-2-3. Fron (R) Circui Diagram

4-3. Digi al Circui Diagram

4-3-1. Digi al 1 Circui Diagram

4-4. Mo her Circui Diagram

4-4-1. Tuner Circui Diagram

4-4-2. Timer Circui Diagram

4-4-3. Audio Circui Diagram

4-4-4. Video Circui Diagram

4-3. Tuner Uni Circui Diagram

5. PC BOARDS

5-1. Fron Jack PC Board

5-2. Fron (LED) PC Board

5-3. Fron (L) PC Board

5-4. Fron (R) PC Board

5-5. Tuner Uni PC Board

5-6. Digi al PC Board

5-7. Mo her PC Board

CONTENTS

SECTION 1

GENERAL DESCRIPTIONS

1. OPERATING INSTRUCTIONS

1. REPLACEMENT OF MECHANICAL PARTS

1-1. Cabine Replacemen

1-1-1. Top Cover

1-1-2. Fron Panel

1-1-3. RAM Diver

1-1-4. Rear Panel

1-1-5. Fan

1-2. PC Board Replacemen

1-2-1. Tuner Uni PC Board

1-2-2. Digi al PC Board

1-2-3. Mo her PC Board

1-2-4. Power PC Board

1-2-5. Fron (R), Fron (L), Fron (LED), and

Fron Jack PC Board

2. WIRING CONNECTION DIAGRAM

2. LOCATION OF MAIN PARTS

2-1. Loca ion of Main Par s

2-2. Loca ion of PC Boards

SECTION 4

PARTS LIST

SAFETY PRECAUTION

NOTICE

ABBREVIATIONS

1. EXPLODED VIEWS

1-1. Packing Assembly

1-2. Chassis Assembly

2. PARTS LIST

SECTION 1

GENERAL DESCRIPTIONS

1. OPERATING INSTRUCTIONS

Please refer to the owner's manual about the contents.

SECTION 1

GENERAL DESCRIPTIONS

2. LOCATION OF MAIN PARTS

2-1. Location of Main Parts

Fig. 1-2-1

2-2. Location of PC Boards

Fig. 1-2-2

ZG45 FAN

RAM1 RAM DRIVE

EU05 Mother PC board

EU05A Tuner Unit PC board

EU01 Digital PC board

EU02 Power PC board

EU03A Front (R) PC board

EU55 Front Jack PC board

EU03B Front (L)

PC board

EU56 Front (LED)

PC board

1-1. Cabinet Replacement

1-1-1. Top Cover

1. Remove five screws (1), then remove the top cover (2).

Fig. 2-1-1

SECTION 2

PART REPLACEMENT AND

ADJUSTMENT PROCEDURES

Screws (1)

Screw (1)

Top cover (2)

SECTION 2

PART REPLACEMENT AND

ADJUSTMENT PROCEDURES

CAUTIONS BEFORE STARTING PART REPLACEMENT

Electronic parts are susceptible to static electricity and may easily damaged, so do not forget to ground as required.

any screws are used inside the unit. To prevent the screws from missing or dropping, etc. always use a magnetized

screwdriver in servicing. Several kinds of screws are used and some of them need special cautions. That is, take care of

the tapping screws securing molded parts and fine pitch screws used to secure metal parts. If they are used improperly,

the screw holes will be easily damaged and the parts can not be fixed.

1. REPLACEMENT OF MECHANICAL PARTS

1-1-2. Front Panel

1. Remove the top cover. (Refer to item 1-1-1.)

2. Disconnect three connectors (1).

3. Remove one screw (2) and the earth lead.

4. Remove two screws (3) and four claws, then remove the front panel (4).

Fig. 2-1-2

1-1-3. RAM Dr ve

1. Remove the front panel. (Refer to item 1-1-2.)

2. Disconnect the flexible cable (1) and connector (2).

3. Remove three screws (3) and the screw (4), then remove the RA drive (5).

4. Remove the shield cover (6).

Note:

• After replacing, attach the tape (1) to its original position.

Fig. 2-1-3

Connector (1) Connector (1)

Connector (1)

Screws (3)

Screws (2)

Earth

Front panel (4)

Claw

Claws

Flexible

cable (1)

Connector (2)

Screws (3)

Screw (4)

RAM drive (5)

Shield cover (6)

1-1-4. Rear Panel

1. Remove the top cover. (Refer to item 1-1-1.)

2. Remove the screw (1) and seven screws (2).

3. Remove the bush from the rear panel (3).

4. Remove two claws, then remove the rear panel (3).

5. Remove two screws (4), then remove the fan (5).

Fig. 2-1-4

1-1-5. Fan

1. Remove the top cover. (Refer to item 1-1-1.)

2. Peel off the tape (1).

3. Disconnnect two connectors (2).

4. Remove two screws (3), then remove the fan (4).

Fig. 2-1-5

Screw (1)

Screws (2)

Screws (4)

Fan (5)

Rear panel (3)

Claw

Bush

Screws (3)

Connectors (2)

Fan (4)

Tape (1)

Hexagonal

nuts

1-2. PC Board Replacement

1-2-1. Tuner Un t PC Board

1. Remove the top cover. (Refer to item 1-1-1.)

2. Disconnect the flexible cable (1).

3. Remove the screw (2) and the screw (3).

4. Remove the claw, then remove the Tuner Unit PC board (4).

Screw (2)

Tuner Unit

PC board (4)

Screw (3)

Claw

Flexible

cable (1)

1-2-2. D g tal PC Board

1. Remove the top cover. (Refer to item 1-1-1.)

2. Peel off the tape (1).

2. Disconnect the flexible cable (2).

3. Remove four screws (3), then remove the Digital PC board (4).

Note:

• The Digital PC board (4) is connected to the other PC board (5) by three connectors (6). Take notice when removing.

Fig. 2-1-7

Fig. 2-1-6

Screws (3)

Digital PC

board (4)

Flexible

cable (2)

Tape (1)

Flexible

cable (2)

Connector

Claw

Connector (6) Connectors (6)

Mother PC board (5)

Remove the connector claw

in the direction indicated

by the arrows to release the

flexible cable.

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