Hitachi PDV302E Service manual

SERVICE MANUAL MANUEL D'ENTRETIEN WARTUNGSHANDBUCH

CAUTION:

Before servicing this chassis, it is important that the service technician read the “Safety Precautions” and “Product Safety Notices” in this service manual.

SM9100

PDV302 PDV302E

Data contained within this Service manual is subject to alteration for improvement.

ATTENTION:

Avant d’effectuer l’entretien du châassis, le technicien doit lire les «Précautions de sécurité» et les «Notices de sécurité du produit» présentés dans le présent manuel.

VORSICHT:

Vor Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise“ und „Hinweise zur Produktsicherheit“ in diesem Wartungshandbuch zu lesen.

Les données fournies dans le présent manuel d’entretien peuvent faire l’objet de modifications en vue de perfectionner le produit.

Die in diesem Wartungshandbuch enthaltenen Spezifikationen können sich zwecks Verbesserungen ändern.

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

DVD Player

October 2004

PDV302 PORTABLE DVD PLAYER

WITH 7″ TFT DISPLAY

CONTENTS

Page

Specifications..................................................................................................................................................2

Block Diagram ................................................................................................................................................3

Disassembly Instructions ................................................................................................................................4

TFT-LCD Driver Board Alignment ..................................................................................................................5

Troubleshooting ..............................................................................................................................................6

Printed Circuit Boards .....................................................................................................................................7

Wiring Diagram .............................................................................................................................................10

Exploded View ..............................................................................................................................................11

IC Lead Identification and Inte rnal Diag ram ................................................................................... ..............25

Voltage Cha rts ................................................................................................................ ..............................30

Schematic Diagram ......................................................................................................................................35

SPECIFICATIONS

DVD PLAYER SECTION

Laser Type : Semiconductor laser Disc Diameter : 12/8 cm Video Decoding : MPEG-2 Video DAC : 10 Bits Video Formats : 4:3 / 16:9 Video Color System Format : NTSC, PAL Audio DAC : 24 Bits / 96 kHz

Audio section

Item Unit Limit

Output level R/L (ch) mV S/N Ratio (A-Weighted) dB 80 Dynamic range (A-Weighted) dB 80 Channel separation R/L (ch) (A-Weighted) dB 66 Distortion % 0.3 Optical digital output level V --Frequency response @ 20 / 20 kHz R/L (ch) dB

Speaker output

850 ± 100

0 ± 3

Item Unit Limit

10% Output power mW >700 S/N ratio (A-Weighted) dB 60 Channel separation R/L (ch) (A-Weighted) dB 55 Distortion % <1 Frequency response @ 100 / 20 kHz R/L (ch) dB

Headphone output

Item Unit Limit

Output power mW >30 S/N ratio (A-Weighted) dB 60 Channel separation R/L (ch) (A-Weighted) dB 55 Distortion % <1 Frequency response @ 100 / 20 kHz R/L (ch) dB

Headphone output

Item Unit Limit

C-Video output level Vp-p

S-Video output level

Y C Vp-p

Vp-p

0 ± 6

1.0 ± 0.1

0.3 ± 0.1

BATTERY AND

PROTECTED

CIRCUIT

DVD PICK UP

Vcc5V V3.3V

B+

AT1380AP

SWITCHING REGULATOR

CONTROLLER

AT5654

DRIVER

CHARGING AND

-16V

+3V

BATT.

DISCHARGING

CONTROLLER

MT1336 E/C

ANALOG

FRONT END

12 V

SDRAM

AC ADAPTER

CT001

CPU

MCU + DECODING

MBM29LV800BA

MT1379 AE/C

RB5P006AM

VIDEO

PROCESSING

KEY

BOARD

Y3/Y4

CONTROL

CS4340 D/A

CONVERTER

IMPEDANLE

LZ9GJ24

TIMING

NET

DAC-ML

DAC-MR

OPTICAL/AUDIO-JACK

S-VIDEO-JACK

VIDEO-JACK

TFT

DISPLAY

F4558

PRE. AMP

INVERTER

BOARD

PT2257S

VOL.

CONTROL

BLOCK DIAGRAM

LM4863

AMP

PH-JACK

SPK

DISASSEMBLY INSTRUCTIONS

DETACH REAR CABINET FROM FRONT CABINET MUST REMOVE 10 SCREWS.

TFT-LCD DRIVER BOARD ALIGNMENT

OSC FREQUENCY ADJUSTMENT

1. Adjust the voltage of VR-OSC to -1.2 ∼ -1.6 V.

2. Turn off and turn on unit.

3. Measure the frequency between VD716 and R781 with X10 probe. It should be 19.8 ∼ 20 MHz, and the value shoulb be steady comparatively.

VCO CHECK

Measure the frequency between X601 and X602 with X10 probe. at NTSC system, the frequency is

3.579545 MHz (±1 kHz), when change to PAL system by remote, the frequency is 4.433619 MHz (±1 kHz).

IMAGE CENTER POSITION ADJUSTMENT

Playing VCD test disc, make the image locate ceter of TFT panel by adjustment VR-BCK.

DRIVER BOARD FUNCTION CHECK

1. Image reverse check:

press “reverse display” key on key board, the image on TFT panel can be 180º reversed.

2. NTSC / PAL switchover check: switch NTSC / PAL system by remote, there are a abviously color change on TFT panel, but the color change can not be colorless.

TROUBLESHOOTING

Item Symptom Cause and Remedy

1 No power

2 No picture

3 Distorted picture

4 Completely Distorted

picture

5 No color in picture (when

connects to TV)

6 Disc can’t be played

7 No sound

8 No return to start-up screen

when disc is removed

9 The player does not

respond to the remote control

10 No audio at digital output

11 Buttons do not work

12 You have forgotten the

password

• Check if power plug is properly connected.

• Check if there is power at the AC outlet by plugging in another

appliance.

• Check if the TV is connected and switched on.

• Select the correct AV input on the TV.

• Check the video connection.

• Check channel selector is set to AV on the TV (See your TV

manual for instructions).

• Check the disc for fingerprints and clean with soft cloth, wiping from centre to edge.

• Sometimes a small amount of picture distortion may appear. This is not a malfunction.

• The disc is not formatted to the TV-set used (PAL/NTSC).

• Ensure DVD Player is not connected through VCR.

• Ensure the disc is label side up.

• Clean the disc.

• Check if the disc is defective by trying another disc.

• Check audio connections.

• Make sure the sound setup of DVD disc is correct.

• Check to see if the program requires another disc to be loaded.

• Reset by unplugging the player from the power supply, the

connect the power supply again.

• Aim the remote control directly at the sensor on the front of the player.

• Avoid all obstacles which may interfere with the signal path.

• Inspect or replace the batteries.

• Check the digital connections.

• Check the digital out menu to make sure that the digital output is

correctly set.

• Check if the audio format of the selected audio language matches your receiver capabilities.

• Unplug the player from power outlet and reconnect after a few seconds.

• The defaulted password is 6789.

MAIN PCB (Top View)

PRINTED CIRCUIT BOARDS

MAIN PCB (Bottom View)

+ 20 hidden pages