Akai Dv-p4799kdmc User manual

SERVICE MANUAL

Model:

DVP4799KDMC

DVD PLAYER

www.akai.ru

1. General Section

1.1 Cautions/Warnings

1.1.1 Product Safety Notice

Parts marked with the symbol in the schematic diagram have critical char-

acteristics.

Use ONLY replacement pares recommended by the manufacturer.

It is recommended that the unit be operated froma suitable DC supply or batter-

ies during initial check out procedures.

1.1.2 Leakage Current Check/Resistance Check

Before returning the unit to the customer, make sure you make either (1) a

leakage current check or (2) a line to insulated resistance check.

If the leakage current exceeds 0.5 milliamps , or if the resistance from chas-

sis to either side of the power cord is less than 240 K ohms, the unit is defec-

tive.

WARNING: DO NOT return the unit to the customer until the problem or loca-

ted and corrected.

1.2. Safe Warnings

1.2.1. Protection of Eyes from Laser Beam

To protect eyes from invisible laser beam during servicing

DO NOT LOOK AT THE LASER BEAM

WARNING HIGH VOLTAGE INSIDE TO PREVENT

ELECTRICAL SHOCK DO NOT REMOVE ANY CO-

VER OR SCREW. REFER ALL SERVICING TO QU-

ALIFIED SERVICE PERSONNEL. DO NOT ALLOW

THIS PRODUCTION BE EXPOSED TO RAIN OR

MOISTURE. DISCONNECT THIS MAINS PLUG

FROM THE SUPPLY SOCKET WHEN NOT IN

USE.

CAUTION

RISK OF ELECTRICSHOCK

DO NOT OPEN

Page 2

1.2.2 Laser Caution

CAUTION

Adjusting the knobs, switches, and controls , ect. Or taking actions not

specified herein may result in a harmful emission of laser beams.

This CD Changer must be adjusted and repaired only by qualified serv ice

personnel.

THIS IS COMPACT DISC PLAYER IS CLASSIFIED AS A CLASS LASER

PRODUCT.

THE LASS 1 LASER PRODUCT LABEL IS LOCATED ON THE REAR EX-

TERIOR.

1.3. Precautions

1.3.1. ESD Precautions in Repairing

1.3.1.1 Do not apply excessive pressure on the mechanical parts (movi-

ng pares), including the Pickup Block, as extremely high mechanical pre-

cision or required in these parts.

1.3.1.2 When soldering the microprocessor and signal processing IC s,

use a ceramic soldering iron or a soldering iron whose metal part is grou-

nded since they are not resistant to static electricity.

1.3.1.3 When removing the solder or soldering the laser shorting lands

for the Pickup Block, use a ceramic soldering iron or a soldering iron wh-

ose metal part is grounded since the laser diode or not resistant to static

electricity.

CAUTION- INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCKS

DEFEATED AVOID EXPOSURE TO BEAM.

VORSICHTI- UNSICHTBARE LASERSTRAHLUNG TRITT AUS. WENN DECKEL

GEOFFNET UND WENN SICHERHEITSVERRIEGELUNG

uBERBRuCKT IST. NICHT DEM STRAHL AUSSETZENI

VARNING- OSYNLIG LASERSTRALNING NAR DENNADEL AR OPPNAD OCH

SPARR AR URKOPPLAD STRALEN AR FARLIG.

ADVARSEL-USYNLIG LASERSTRALING VED ABNING NAR

SIKKERHEADSAFBRYDERE ER UDE AFFUNKTION. UNDGA

UDSAETTELSE FOR STRALING.

CLASS 1 LASER PRODUCT

LUOKAN 1 LASERLAITE

KLASS 1 LASERAPPARAT

Page 3

1.3.2. DVD Loading Unit Precautions When handing the

Mechanism Block

1.3.2.1 Do not loosen any screws in the Pickup Block.

1.3.2.2 Do not adjust any screws in the Mechanism Block except for

Tilt Adjust Screws , as they are adjusted precisely at the factory.

1.3.2.3 Replacement of the Pickup Block is impossible. Always repl-

ace the Traverse Ass s when the Pickup Block needed to be replace .

Do not touch the lens or lens holder of the Pickup Block.

1.3.2.4 The Guide Rails of the Pickup Block are greased. Take care wh-

en handing.

1.3.2.5 When you try to slide the Pickup Block, do not press or pull it

directly, Always turn the dive gears with your fingers.

1.3.2.6 Be sure that the anti-slipping rubber on the turnable or clean.

If there is dust or it is greasy,clean the part with the liquid that contains

50% each of alcohol and water.

1.3.2.7 When removing the Mechanism P.C.B. Ass s, you need to sho-

rt-circuit the laser diode shorting lands beforehand.

1.4. Software Upgrade

You can upgrade DVD player using the software we provide as following step:

The CD-R update is below lists:

First, burn CDR for upgrade. Dummy files are needed minimum 20Mbytes.

The burning software is Nero burning soft:

1. Volume name: MTK

2. Files name and type: MEDIATEK .BIN ( This file must locate Root directory)

3. CD-R burn type(formate): ISO9660

Model 1

ISO1 (level 1)

don t choice Jolient

don t choice loosen ISO strict

Notice: MTK and MEDIATEK .BIN are upper case.

The CD upgrade process:

After the servo read the CD-R data ,Show Message on TV :

Page 4

UPGRADE FILE DETECTED

UPGRADE ?

PRS CHOOSE (1-8Bit 2-16Bit)

Press 1 key , Show Message on TV

UPGRADE FILE DETECTED

UPGRADE ?

File Copy

The tray is automatic to open, take disc away.

UPGRADE FILE DETECTED

UPGRADE ?

Upgrading

At this time, please wait a few minutes, DVD is downloading code to flash, After

Logo will be show on TV again, the update process finish.

Notice: During upgrading , don s turn off power.

Displaying the software Version Number

After opening the tray, press the following keys on the remote control ,

DISPLAY (Up) (Down) (Left) (Right)

then the software version number appears.

Page 5