Philco MDV-601 Service manual

SERVICE MANUL

DOLBY

DIGITAL

DVD COMBO PLAYER

DOWN

INTRODUCTION

This service manual contains technical information which will allow service personnels to understand and service this model.

Section 1 presents you with some general information of features and control, enabling you to become familiar with each function.

Section 2 contributes to yours mechanical disassembly and replacement procedures, and electrical adjustment as well. Section 3 contains block diagrams which offers you information for checking and understanding each circuit.

Section 4 - Troubleshooting- give some common symptom and remedy.

SERVICE INFORMATION

1-1. HOW TO CHECK THE CRACKED CHIP PART

1. Apply heat to the soldered portions of chip part using a soldering iron for about 2-3 seconds.

2. If the chip part is faulty, it will be broken or cracked.

2. REMOVAL (transistor, diode, etc...)

2.1 Grasp the chip part with tweezers and melt the solder of one lead.

TWEEZERS

CHIP PART

Caution: Do not leave soldering iron on the PCB too

long as damage may occur to the PCB or the chip parts.

SOLDERED PORTIONS

SOLDERING IRON

CHIP PART

FIG. G1

Note: Regarding intermittent faults

The main causes of these faults are poor soldering and cracked chip parts.

1-2. HOW TO REPLACE THE CHIP PART

1. REMOVAL (RESISTOR, CAPACITOR, etc...)

1.1 Presolder the one side of soldering portion for chip part and grasp the chip part by tweezers.

1.2 Melt the presoldered portion. And then remove the

chip part with a twisting motion while melting the soldering portion of another side quickly.

SOLDERING IRON

FIG. G3

2.2 Lift the side of that lead upward.

TWEEZERS

CHIP PART

SOLDERING IRON

Caution: Do not lift the chip part too high as damage

FIG. G4

may occur to the PCB or the leads that are still soldered on the PCB.

2.3 Simultaneously heat the solder of the two remaining leads and lift part to remove.

SOLDERING IRON

CHIP PART

PRESOLDER

SOLDERING IRON

FIG. G2

TWEEZERS

3. INSTALLATION

FIG. G5

3.1 Presolder the one side of contact point on the circuit board.

PRESOLDER

SOLDERING IRON

FIG. G6

3.2 To install the chip part, hold in position using tweezers, apply heat to the pre-soldered portions using a fine tip soldering iron.

3.3 Solder the other side of the chip part.

3.4 Check you soldering.

(WITH SOLDERING IRON)

1. Using solder braid remove the solder from all pins of the Flat-IC.

When you use the solder flux which is applied to all pins of the Flat-IC, you can remove it easily.

TWEEZERS

CHIP PAR T

SOLDERING IRON

SOLDER

FIG. G7

1-3.HOW TO REMOVE THE FLAT-IC

(WITH HOT-AIR FLAT-IC DESOLDERING MACHINE)

(FOR EXAMPLE)

DE-SOLDER BRAIDS

FLAT-IC

SOLDERING IRON

FIG. G10

2. Lift each lead of the Flat-IC upward one by one

using a sharp pin or non solder wire (iron wire), while heating the pins using a fine tip soldering iron or a hot air blower.

SHARP PIN

SOLDERING IRON

FIG. G8

1. Prepare the HOT-AIR FLAT-IC DESOLDERING MACHINE. And then apply hot air to FLAT-IC about 5~8 seconds.

2. Remove the FLAT-IC with tweezers while applying the hot air.

Caution: Do not supply the hot air to the chip parts

around the FLAT-IC for long time as damage may occur to the chip parts around the FLATIC.

C.B.A.

TWEEZERS

FLAT-IC

FIG. G9

HOT-AIR FLAT-IC DESOLDERING MACHINE

FIG. G11

(WITH IRON WIRE)

1. Affix the wire to workbench or solid mounting point as shown in FIG G12.

2. Pull up wire as the solder melts so as to lift the IC lead

from the PCB contact pad, while heating the pins using a fine tip soldering iron or hot air blower

HOT AIR BLOWER

IRON WIRE

OR SOLDERING IRON

FIG. G12

Note: When using a soldering iron care must be taken to

ensure that the Flat IC is not being held by glue before it is the PCB may be damaged if force is

SECTION 1

1.1 Front View And Back View

262427

8 9

STANDBY indicator - when the unit is power off state

2325

DOWN

10 13

by remote control, the indicator will be on(standby) ,if you power on by remote control, the indicator will be off.

Power button

-press this button to power the player on or off state: This button must be on in order to be able to use the remote control.

Remote Sensor

-receive the signal from the remote

control.

Audio button -Select the sound track Display button -Press Display button continuously

during the playback, the screen will display the elapsed time and remaining time.

Function Switch

slide this button to select a different sound source such as DVD, Radio ..

Cassette

Headphone Jack -connect one headphone

Cassette Record button - can record sound signal from other sound source such as radio and DVD etc. The Cassette Record and Play button should be pressed down at the same time

Cassette Play button press down this button to play the cassette tape.

Cassette Fast Rewind button -rewind the cassette fast by pressing this button

Cassette Fast Forward button- search the desired point forward by pressing the button.

Stop/Eject button - stop the cassette playing or recording by pressing this button once and remove the cassette tape by pressing this button again

Pause button - halt the cassette play.

MIC Mixing Jack -connect the Microphone

MIC Volume Control -adjust the microphone volume Band Switch -select the radio AM or FM band

Repeat 1/all button -repeat one/all chapter(s) or

title(s)or track(s)

Subtitle button -display the different subtitle language on the screen by pressing this button

NTSC/PAL button -press this button to change the TV NTSC system and PAL TV system

Volume Up/Down button- increase/reduce the volume

FM ANT

SPEAKER

R L

AUDIO OUT

AUDIO

AC~

level by pressing this button

Tuning Control- adjust the knob to search the desired

station.

FM Stereo Indicator - the indicator will light when

receiving the stereo FM broadcast

DVD Play/Pause button -play the disc or halt the the

playing temporarily by press this button

DVD Stop button -halt the DVD playing by press the

button

LCD Display - show all information of the DVD playing

DVD Next button -skip to the next chapter (DVD) or

track (for CD)

DVD Previous button -skip to the previous chapter

(for DVD) or track (for CD)

DVD Door -the top cover of DVD player

DVD door PUSH CLOSE button

-close the DVD

player door by pressing this area. If loading a disc, the

player will read the disc immediately after close the

DVD door

DVD door OPEN button

-open the DVD player door

by pressing this button

FM ANTENNA

SPEAKER JACK

AUDIO OUTPUT RCA JACK

COMPOSITE VIDEO OUTPUT RCA JACK

COAXIAL DIGITAL OUTPUT

AC POWER SWITCH(OPTIONAL)

AC CORD

VIDEO OUT

COAXIAL

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