Kenwood DVF-5020 Bedienungsanleitung

DVD VCD CD PLAYER

DVF-5020

SERVICE MANUAL

70%

In compliance with Federal Regulations, following are repro-

ductions of labels on, or inside the product relating to laser

product safety.

KENWOOD-Crop. certifies this equipment conforms to DHHS

Regulations No. 21 DFR 1040. 10, Chapter 1, Subchapter J.

DANGER : Laser radiation when open and interlock

defeated.

AVOID DIRECT EXPOSURE TO BEAM

Caution : No connection of ground line if disassemble

the unit. Please connect the ground line on

rear panel, PCBs, Chassis and some others.

NOTE : Please use the remote controller

for self-diagnosis and tilt adjust-

ment.

AC IN

AV1

AV2

S VIDEO OUT

VIDEO

OUT

AUDIO OUT

DIGITAL AUDIO OUT

OPTICAL

CENTER FRONT

SURROUND

SUB

WOOFER SURROUND

FRONT R

(PCM/BIT STREAM)

COAXIAL

STANDBY VIRTUAL

SURROUND

OPEN/CLOSE

Tray top

(A29-1093-08) Front panel

(A60-1820-08)

Power button

(K27-2399-08) Front cover

(B10-3573-08) Leg

(J02-1468-08)

Top cover

(A01-3749-08) Pin jack

(E63-1149-08)

AC inlet

(E40-8593-08)

ConnectorX2

(E40-8598-08)

Y/C connector

(E63-1148-08)

Oscillating module

(W02-2735-08) Pin jack

(E63-1151-08) Pin jack

(E63-1150-08)

This manual is available for repair in the Europe markets. In other market, please refer to service

manual (B51-5583-00).

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DVF-5020

CONTENTS / ACCESSORIES

CONTENTS / ACCESSORIES .................................. 2

DISASSEMBLY FOR REPAIR....................................3

BLOCK DIAGRAM....................................................14

CIRCUIT DESCRIPTION..........................................18

ADJUSTMENT..........................................................21

ABBREVIATION........................................................22

VOLTAGE CHART....................................................24

WIRING DIAGRAM...................................................33

PC BOARD .............................................................. 34

SCHEMATIC DIAGRAM.......................................... 39

EXPLODED VIEW ....................................................64

PARTS LIST..............................................................67

SPECIFICATIONS ......................................Back cover

Contents

(A70-1353-08) (E30-2937-08)

(E30-2938-08) (E30-2365-05)

Remote control unit . . . . . . . . . 1 for remote control unit [size "AA"]

Batteries. . . . . . . . . . . . . . . . . . . . 2 AC cord. . . . . . . . . . . . . . . . . . . .. . 1

Video/audio cable. . . . . . . . . . . . 1 Digital cord. . . . . . . . . . . . . . . . . . . 1 (E30-2945-08)

Audio cable. . . . . . . . . . . . . . . . . . . 2

Accessories

Note: There is different part in this manual as compared with a usual one because we use OEM

factory's data.

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DISASSEMBLY FOR REPAIR

1-1 Casing Parts and C.B.A. Positions

1. Assembling and Disassembling the Casing

and Checking C.B.A.s 1-4 Disassembling the Front Panel

1. Release the 3 tabs on the bottom.

2. Release the 2 tabs on the left and right.

3. Release the 2 tabs.

4. Disconnect the 2 flexible cables.

1-5 Disassembling the Loading Base Unit

1. Remove the 4 screws.

2. Pull out the loading base unit vertically.

Note

There is a danger of damaging the connectors.

1-2 Service Positions

Note

To inspect the loading base unit, position the left side

upward (as viewed from the front).

1-3 Disassembling the Tray

1. Turn the lever clockwise.

2. Move the tray in the direction of the arrow until it locks.

3. Release the tab locks on the left and right, then pull out

the tray.

Extension cable (A)

Extension cable (B)x2

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DISASSEMBLY FOR REPAIR

1-6 Checking the Module C.B.A.

1. Remove the 2 screws.

2. Connect the module C.B.A. to the mother C.B.A. with the

extension cables for inspection.

• Extension cable (B)x2

Mother C.B.A. Module C.B.A.

PP24201-PS4201

PP23201-PS3201

Note

Be sure to initialize the player whenever you replace a

C.B.A. (Refer to page21/4-1 Initializing the DVD Player.)

1-7 Disassembling the Rear Panel,

1. Remove all of the screws connected to the rear panel.

(The number of screws varies according to the model).

1-8 Checking the Power Supply C.B.A.

1. Remove the 3 screws.

2. Carefully pull out the power supply C.B.A.

Note

There is a danger of damaging the connectors.

3. Connect the power supply C.B.A. and the mother C.B.A.

with the extension cable for inspection.

• Extension cable(A) (connects the power supply C.B.A.

PS1101 and the mother C.B.A. PP1101)

2. Release the two tabs on the left and right.

Extension cable(A)

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DISASSEMBLY FOR REPAIR

1-9 Checking the Mother C.B.A.

1. Remove the 5 screws.

2. Release the 2 tabs.

2. To preserve the quality of the optical pickup replacement

parts during transport and installation, the terminals of

the laser diode are short-circuited. After replacing the

parts, use the proper procedure to return the laser diode

to its original condition. (Refer to page9/2-12 Assembling

the Optical Pickup.)

3. Testers cannot be used to check the laser diode of the

optical pickup. The power supply inside the tester can

easily damage the laser diode.

4. Take care when handling the flexible cable because

excessive force can cause it to break.

5. You cannot adjust the semifixed resistor for laser power

adjustment. Do not turn it.

2-2 Disassembly Procedure

Use the following procedure to replace major parts.

For the assembly procedure, follow the flow chart in reverse.

3. Checked by connecting the module C.B.A. and the moth-

er C.B.A. with the extension cables.

Extension cable (B)x2

Module C.B.A. Mother C.B.A.

PS3201-PP23201

PS4201-PP24201

Note

Be sure to initialize the player whenever you replace a

C.B.A. (Refer to page21/4-1, Initializing the DVD player.)

2. Assembling and Disassembling the Optical

Pickup (Mechanical Parts)

The optical pickup can be damaged by static electricity from

your body. Be sure to take static electricity countermeasures

when working around the optical pickup.

2-1 Handling the Optical Pickup

The optical pickup can be damaged by static electricity

from your body. Be sure to take static electricity counter-

measures when working around the optical pickup.

1. The optical pickup is an extremely high-precision mecha-

nism. Do not subject it to strong impact.

Extension cable(B)

Extension

cable(B)

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DISASSEMBLY FOR REPAIR

2-3 Lubricating the Loading Base Unit

When replacing parts, lubricate the parts maked “xxx” in the diagram

Part number Service Tool

Grease 410-0013-05 Grease EM-30LG

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DISASSEMBLY FOR REPAIR

2-4 Static Electricity Countermeasures

The laser diode inside the traverse unit (optical pickup) can

be damaged by static electricity from your body. Be sure to

take static electricity countermeasures when working around

the optical pickup.

2-4-1 Static Electricity Countermeasure Methods

1. Ground yourself

Use an anti-static wrist strap to discharge static electrici-

ty from your body.

2. Ground the workbench

Lay a conductive material (sheet) or steel sheet on the

surface where the traverse unit (optical pickup) is to be

placed, then ground the sheet.

2-5 Disassembling the Clamp Base Unit

Remove the 2 screws.

2-6 Disassembling the Clamper Weight, Clamper

Yoke, Magnet and Clamper

1. Release the tab, and pull out the clamper.

2. Release the 3 tabs on the clamper.

2-4-2 Short-circuit the laser diode

Solder the land in the flexible cable of the optical pickup.

Notes

• Be sure to do this befer disconnecting the flexible cable

of the optical pickup from the module C.B.A.

• Use an anti-static soldering iron to short-circuit and

unshort-circuit laser diode.

(Recommended soldering iron: Hakko with ESD counter-

measure)

• After you have finished repairing the laser diode, follow

the correct procedure to remove the solder from the

short-circuit location. (Refer to page5/2. Assembling and

Disassembling the Optical Pickup (Mechanical Parts).)

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DISASSEMBLY FOR REPAIR

2-7 Disassembling the Traverse Unit

1. Remove the 3 screws.

Note

Be sure to take static electricitiy countermeasures befer

disconnecting the flexible cable.(Refer to page7/2-4 Stat-

ic Electricity Countermeasures.)

2. Disconnect the 2 flexible cables.

2-8 Disassembling the Stepping Motor Unit

1. Disconnect the flexible cable.

2. Remove the 2 screws.

Note

Take care when handling the flexible cable because it

can be broken by excessive force.

2-9 Disassembling the Optical Pickup Unit

1. Remove the hook of the FPC holder, then remove the

FPC holder itself.

2. Remove the screw.

3. Release the tab, then remove spring holder 1.

Note

Be sure not to lose the spring.

4. Remove the guide shaft.

Note

Be sure to adjust the optical pickup tilt after replacing the

optical pickup.

(Refer to page10/2-14 Opitcal Pickup Tilt Adjustment.)

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DISASSEMBLY FOR REPAIR

2-10 Disassembling the Nut Unit

1. Remove the screw.

Notes

• The nut unit is not part of the optical pickup.

Before replacing the optical pickup, remove the nut unit

for use with the new optical pickup.

• After installation, use screw lock to lock the screw in posi-

tion.

• When reassembling, use screw lock to lock the screw in

position after attaching it.

2-12 Assembling the Optical Pickup

1. Install the optical pickup.

Note

Take care not ot attach the tilt spring and guide shaft in

the wrong order.

2. Fit the protruding part of the pickup FPC into the convex-

part of the FPC holder to install it.

2-11 Disassembling the Sub-Shaft Preload Spring

1. Remove the screw.

Notes

• Handle the sub-shaft preload spring carefully because the

shape of the tip is easily deformed.

• The sub-shaft preload spring is not part of the optical

pickup. Before replacing the optical pickup, remove the

sub-sahft preload spring for use with the new optical

pickup.

• After installation, use screw lock to lock the screw in posi-

tion.

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DISASSEMBLY FOR REPAIR

3. Insert the pickup FPC into connector FP5201 on the mod-

ule C.B.A. 2-14 Optical Pickup Tilt Adjustment

4. Remove the solder from the pickup FPC's soldered short-

circuit.

5. Adjust the optical pickup tilt after removing the solder.

(Refer to page10/2-14 Optical Pickup Tilt Adjustment.)

2-13 Disassembling the Spindle Motor Unit

1. Remove the three screws.

Note

Be sure to adjust the optical pickup tilt after replacing the

spindle motor unit.

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