SHARP DV-SL90UM Diagram

SERVICE MANUAL

DV-SL90UM

SERVICE MANUAL

S64U2DV-SL90U

DVD VIDEO PLAYER

SPECIFICATIONS ............................................................................................................................. 1-1-1

MODEL

DV-SL90UM

LASER BEAM SAFETY PRECAUTIONS .......................................................................................... 1-2-1

IMPORTANT SAFEGUARDS AND PRECAUTIONS......................................................................... 1-3-1

STANDARD NOTES FOR SERVICING............................................................................................. 1-4-1

OPERATING CONTROLS AND FUNCTIONS .................................................................................. 1-5-1

CABINET DISASSEMBLY INSTRUCTIONS ..................................................................................... 1-6-1

FIRMWARE RENEWAL MODE .........................................................................................................1-7-1

TROUBLESHOOTING .......................................................................................................................1-8-1

BLOCK DIAGRAMS........................................................................................................................... 1-9-1

SCHEMATIC DIAGRAMS/ CBA’S AND TEST POINTS ..................................................................1-10-1

WAVEFORMS.................................................................................................................................. 1-11-1

WIRING DIAGRAM ..........................................................................................................................1-12-1

SYSTEM CONTROL TIMING CHARTS .......................................................................................... 1-13-1

IC PIN FUNCTION DESCRIPTIONS ...............................................................................................1-14-1

LEAD IDENTIFICATIONS................................................................................................................ 1-15-1

EXPLODED VIEWS .........................................................................................................................1-16-1

MECHANICAL PARTS LIST ............................................................................................................1-17-1

ELECTRICAL PARTS LIST ............................................................................................................. 1-18-1

MODEL

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified be used.

CONTENTS

DV-SL90UM

Page

SHARP CORPORATION

This document has been published to be used for after sales service only. The contents are subject to change without notice.

SPECIFICATIONS

ITEM CONDITIONS UNIT NOMINAL LIMIT 1 Video Output 75 Ω Vpp 1.0 ±0.1 2 Coaxial Digital Out mVpp 500 3 Audio (PCM)

3-1. Output Level 1 kHz 0 dB Vrm 2.0 3-2. S/N dB 120 3-3. Freq. Response

DVD fs=48 kHz 20 ~ 22 kHz dB ±0.5 CD fs=44.1 kHz 20 ~ 22 kHz dB ±0.5

3-4. THD +N

1k Hz 0 dB % 0.0025

1k Hz 0 dB % 0.003 4 Power consumption 14 W (Standby: 2.0 W) 5 Weight 2.9 lbs (1.3kg) 6 Dimension 435 mm X 51 mm X 211 mm

NOTES:

1. All Items are measured without pre-emphasis unless otherwise specified.

2. Power supply : AC 110 V - 240 V 60Hz

3. Load imp. : 100 k ohm

4. Room ambient : 5 °C ~ 40 °C

1-1-1

E5945SP

LASER BEAM SAFETY PRECAUTIONS

This DVD player uses a pickup that emits a laser beam.

Do not look directly at the laser beam coming from the pickup or allow it to strike against your skin.

The laser beam is emitted from the location shown in the figure. When checking the laser diode, be sure to keep your eyes at least 30cm away from the pickup lens when the diode is turned on. Do not look directly at the laser beam.

Caution: Use of controls and adjustments, or doing procedures other than those specified herein, may result in hazardous radiation exposure.

rive Mecha Assembly

Laser Beam Radiation

Laser Pickup

Turntable

1-2-1

DVD_LASER

IMPORTANT SAFEGUARDS AND PRECAUTIONS

T M

1. IMPORTANT SERVICE NOTES

BEFORE RETURNING THE DVD VIDEO PLAYER Before returning the DVD video player to the user,

perform the following safety checks.

1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the DVD video player.

2. Inspect all protective devices such as non-metallic control knobs, insulation materials, cabinet backs, adjustment and compartment covers or shields, isolation resistor/capacitor networks, mechanical insulators etc.

3. To be sure that no shock hazard exists, check for current in the following manner. Plug the AC line cord directly into a 230 volt AC outlet (Do not use an isolation transformer for this test). Using two clip leads, connect a 1.5k ohm, 10 watt resistor paralleled by a 0.15µF capacitor in series with all exposed metal cabinet parts and a known earth ground, such as a water pipe or conduit. Use an DVM or VOM with 1000 ohm per volt, or higher, sensitivity or measure the AC voltage drop across the resistor (See Diagram). Move the resistor connection to earth exposed metal part having a return path to the chassis (metal cabinet, screw heads, knobs and control shafts, etc.) and measure the AC voltage drop across the resistor.

Reverse the AC plug on the set and repeat AC voltage measurements for each exposed part. Any reading of

1.4V rms (this corresponds to 0.7mA rms AC.) or more is excessive and indicates a potential shock hazard which must be corrected before returning the DVD video player to the owner.

SSVM

AC SCALE

1.5k ohms. 10W

0.15

TEST PROBE

O EXPOSED

ETAL PARTS

CONNECT TO KNOWN EARTH GROUNG

1. NOTES DE SERVICE IMPORTANTES

AVANT DE RENDRE LE REPRODUCTOR DE VíDEO DVD

Avant de rendre le reproductor de vídeo DVD à l’utilisateur, effectuer les vérifications de sécurité suivantes.

1. Vérifier toutes les gaines de fil pour être sûr que les fils ne sont pas pincés ou que le matériel n’est pas coincé entre le châssis et les autres pièces métalliques dans le reproductor de vídeo DVD.

2. Vérifier tous les dispositifs de protection tels que les boutons de commande non métalliques, les matériaux d’isolement, le dos du coffret, les couvercles de compartiment et ajustement ou les boucliers, les réseaux de résistance / condensateur d’isolement, Ies isolateurs mécaniques, etc.

3. Pour être sûr qu’il n’y a aucun risque de choc électrique, vérifier le courant de fuite de la maniére suivante. Brancher le cordon d’alimentation secteur directement dans une prise de courant de 230 volts. (Ne pas utiliser de transformateur d’isolement pour cet essai). Utiliser deux fils à pinces et connecter une résistance de 10 watts 1,5 kohm en parallèle avec un condensateur de 0,15 µF en série avec des pièces du coffret métallique exposées et une masse de terre connue telle qu’un tuyau ou un conduit d’eau. Utiliser un DVM ou VOM avec une sensibilité de 1000 ohms par volt ou plus ou mesurer la chute de tension CA entre la résistance (voir diagramme). Déposer la connexion de la résistance à toutes les

pièces métalliques exposées ayant un parcours de retour au châssis (coffret métallique, tétes de vis, boutons et arbres de commande, etc.) et mesurer la chute de tension CA entre la résistance. Inverser la fiche CA (une fiche intermédiaire non polarisée doit être utilisée à seule fin de faire ces vérifications.) sur l’appareil et répéter les mesures de tension CA pour chaque piéce métallique exposée. Toute lecture de 1,4 V rms (ceci correspond à 0,7 mA rms CA) ou plus est excessive et signale un danger de choc qui doit être corrigé avant de rendre le reproductor de vídeo DVD à son utilisateur.

VTVM

AC SCALE

1.5k ohms 10W

0.15 F

TEST PROBE

TO EXPOSED METAL PARTS

CONNECT TO KNOWN EARTH GROUND

1-3-1

E5943IMP

STANDARD NOTES FOR SERVICING

Circuit Board Indications

a. The output pin of the 3 pin Regulator ICs is indicated

as shown.

Top View

Out

b. For other ICs, pin 1 and every fifth pin are indicated

as shown.

< Bottom View >

Input

Bottom View

Pin 1

c. The 1st pin of every male connector is indicated as

shown.

< Bottom View >

Pin 1

Instructions for Connectors

1. When you connect or disconnect the FFC (Flexible Foil Connector) cable, be sure to first disconnect the AC cord.

2. FFC (Flexible Foil Connector) cable should be inserted parallel into the connector, not at an angle.

FFC Cable

Using lead-free wire solder

When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire solder may cause damage or accident due to cracks.

As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40°C, we recommend you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldening bit, contact our service station or service ranch in your area.

Soldering

As the melting point of lead-free solder (Sn-Ag-Cu) is about 220°C which is higher than the conventional lead solder by 40°C, and as it has poor solder wettabillty, you may be apt to keep the soldering bit in contact with the PWB for extended period of time. However, Since the land may be peeled off or the maximum heat-resistance temperature of parts may be excoeded, remove the bit from the PWB as soon as you conurm the steady soldering condition.

Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to tum on and off the power of the bit as required. if a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every use of it.

When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.

Becareful when replacing parts with polarity indication on the PWB silk.

Lead-free wire solder for servicing

Part No. Description Code ZHNDAi123250E J 0.3mm 250g(1roll) BL ZHNDAi126500E J 0.6mm 500g(1roll) BK ZHNDAi12801KE J 1.0mm 1kg(1roll) BM

Connector

CBA

* Be careful to avoid a short circuit.

1-4-1

DVD_NOTE2

How to Remove / Install Flat Pack-IC

Flat Pack-IC

Desoldering Braid

Soldering Iron

Fig. S-1-3

Fine Tip Soldering Iron

Sharp Pin

Fig. S-1-4

With Soldering Iron:

1. Removal

With Hot-Air Flat Pack-IC Desoldering Machine:

(1) Prepare the hot-air flat pack-IC desoldering ma-

(2)Remove the flat pack-IC with tweezers while apply-

(3)Bottom of the flat pack-IC is fixed with glue to the

(4)Release the flat pack-IC from the CBA using twee-

Caution:

1. Do not supply hot air to the chip parts around the flat

2. The flat pack-IC on the CBA is affixed with glue, so

chine, then apply hot air to the Flat Pack-IC (about 5 to 6 seconds). (Fig. S-1-1)

Fig. S-1-1

ing the hot air.

CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)

zers. (Fig. S-1-6)

pack-IC for over 6 seconds because damage to the chip parts may occur. Put masking tape around the flat pack-IC to protect other parts from damage. (Fig. S-1-2)

be careful not to break or damage the foil of each pin or the solder lands under the IC when removing it.

Hot-air Flat Pack-IC Desoldering

CBA

Masking Tape

Tweezers

Machine

Flat Pack-IC

Fig. S-1-2

(1)Using desoldering braid, remove the solder from all

pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig. S-1-3)

(2)Lift each lead of the flat pack-IC upward one by one,

using a sharp pin or wire to which solder will not adhere (iron wire). When heating the pins, use a fine tip soldering iron or a hot air desoldering machine. (Fig. S-1-4)

(3)Bottom of the flat pack-IC is fixed with glue to the

CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)

(4)Release the flat pack-IC from the CBA using twee-

zers. (Fig. S-1-6)

With Iron Wire:

(1)Using desoldering braid, remove the solder from all

pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig. S-1-3)

(2) Affix the wire to a workbench or solid mounting point,

as shown in Fig. S-1-5.

(3)While heating the pins using a fine tip soldering iron

or hot air blower, pull up the wire as the solder melts so as to lift the IC leads from the CBA contact pads as shown in Fig. S-1-5.

1-4-2

DVD_NOTE2

(4)Bottom of the flat pack-IC is fixed with glue to the

Example :

Pin 1 of the Flat Pack-IC is indicated by a " " mark.

Fig. S-1-7

Presolder

CBA

Flat Pack-IC

Fig. S-1-8

CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6)

(5)Release the flat pack-IC from the CBA using twee-

zers. (Fig. S-1-6)

Note:

When using a soldering iron, care must be taken to ensure that the flat pack-IC is not being held by glue. When the flat pack-IC is removed from the CBA, handle it gently because it may be damaged if force is applied.

Hot Air Blower

Iron Wire

2. Installation

(1)Using desoldering braid, remove the solder from the

foil of each pin of the flat pack-IC on the CBA so you can install a replacement flat pack-IC more easily.

(2) The “

(3)Solder all pins of the flat pack-IC. Be sure that none

” mark on the flat pack-IC indicates pin 1. (See Fig. S-1-7.) Be sure this mark matches the 1 on the PCB when positioning for installation. Then presolder the four corners of the flat pack-IC. (See Fig. S1-8.)

of the pins have solder bridges.

To Solid Mounting Point

CBA

Tweezers

Soldering Iron

Fig. S-1-5

Fine Tip Soldeing Iron

Flat Pack-IC

Fig. S-1-6

1-4-3

DVD_NOTE2

Instructions for Handling Semi-conductors

Electrostatic breakdown of the semi-conductors may occur due to a potential difference caused by electrostatic charge during unpacking or repair work.

1. Ground for Human Body

Be sure to wear a grounding band (1MΩ) that is properly grounded to remove any static electricity that may be charged on the body.

2. Ground for Workbench

Be sure to place a conductive sheet or copper plate with proper grounding (1MΩ) on the workbench or other surface, where the semi-conductors are to be placed. Because the static electricity charge on clothing will not escape through the body grounding band, be careful to avoid contacting semi-conductors with your clothing.

< Incorrect >

< Correct >

CBA

Grounding Band

CBA

Conductive Sheet or Copper Plate

1-4-4

DVD_NOTE2

OPERATING CONTROLS AND FUNCTIONS

1-5-1

E592AIB

CABINET DISASSEMBLY INSTRUCTIONS

1. Disassembly Flowchart

This flowchart indicates the disassembly steps to gain access to item(s) to be serviced. When reassembling, follow the steps in reverse order. Bend, route, and dress the cables as they were originally.

[1] T op Case

[2] Front Assembly

[3] Reinforce Plate

[4] DVD Main CBA Unit

[5] DVD Mecha

[6] AV CBA

1 : Identification (location) No. of parts in the figures 2 : Name of the part 3 : Figure Number for reference 4 : Identification of parts to be removed, unhooked,

unlocked, released, unplugged, unclamped, or desoldered. P=Spring, L=Locking Tab, S=Screw, CN=Connector, *=Unhook, Unlock, Release, Unplug, or Desolder e.g.5(S-1) = five Screws (S-1),

2(L-2) = two Locking Tabs (L-2)

5 : Refer to "Reference Notes."

[7] Function CBA

2. Disassembly Method

ID/

LOC.

No.

[1] Top Case 1 3(S-1) [2] Front 2 *4(L-1), *3(L-2), 1

[3]

[4]

[5] DVD 5 4(S-4)

[6] AV CBA 6 (S-5), 5(S-6), *2(L-5) [7]

↑↑↑ ↑ ↑

123 4 5

PART

Assembly *3(L-3), 1-1

Reinforce Plate

DVD

Main 4 (S-3A), (S-3B), 2

CBA Unit *CN201, *CN301, 2-1

Mecha

Function CBA

Fig.

No.

3 3(S-2) -

6 *CN2001 -

REMOVAL

REMOVE/ *UNHOOK/UNLOCK/ RELEASE/UNPLUG/ DESOLDER

*CN401, *CN601 2-2

Note

1-2

About tightening screws

When tightening screws, tighten them with the following torque.

Screws Torque

(S-1), (S-2), (S-3A), (S-4), 0.45 ± 0.05 N•m (S-5), (S-6) (S-3B) 0.38 ± 0.04 N•m

Reference Notes

CAUTION 1: Locking Tabs (L-1), (L-2) and (L-3) are fragile. Be careful not to break them.

1-1. Release four Locking Tabs (L-1). Then, release

three Locking Tabs (L-2).

1-2. Release three Locking Tabs (L-3). Then remove

the Front Assembly.

CAUTION 2: Electrostatic breakdown of the laser diode in the optical system block may occur as a potential difference caused by electrostatic charge accumulated on cloth, human body etc., during unpacking or repair work.

To avoid damage of pickup follow next procedures. 2-1. Short the three short lands (either of two places) of

FPC cable with solder before removing the FFC cable (CN201) from it as shown in “View for A” in Fig. 4. If you disconnect the FFC cable (CN201), the laser diode of pickup will be destroyed. (Fig. 4)

2-2. Disconnect Connectors (CN301), (CN401) and

(CN601). Remove two Screws (S-3A) and (S-3B) and lift the DVD Main CBA Unit. (Fig. 4)

CAUTION 3: When reassembling, confirm the FFC cable (CN201) is connected completely. Then remove the solder from the three short lands of FPC cable. (Fig. 4)

1-6-1

E592ADC

[1] T op Case

(S-1)

CN201

CN301

(S-3B)

(S-3A)

CN601

(L-1)

(L-3)

(L-1)

(L-2)

[2] Front Assembly

Fig. 1

Fig. 2

Short lands

Solder

CN401

[4] DVD Main CBA Unit

Short the three short lands by soldering. (Either of two places.)

FPC Cable

(S-2)

[3] Reinforce Plate

Fig. 3

Solder

(S-4)

View for A

Fig. 4

[5] DVD Mecha

(S-4)

1-6-2

Fig. 5

E592ADC

[7] Function CBA

(S-5)

CN2001

[6] AV CBA

(S-6)

(L-5)

Fig. 6

HOW TO EJECT MANUALLY (Method 1)

1 Remove the Top Case. 2 Remove the Reinforce Plate. 3 Rotate the roulette in the direction of the arrow as shown below.

Rotate this roulette in the direction of the arrow

View for A

1-6-3

E592ADC

HOW TO EJECT MANUALLY (Method 2)

1 Turn the unit over. 2 Insert the shaft less than a diameter of 3 mm (e.g. screwdriver) straightly into the opening

as shown. 3 Turn the shaft along with the opening clockwise. 4 Repeat steps 2 and 3 until the tray will open. 5 Pull the tray slowly with a hand.

View for B

Rear

Turn the shaft along with the opening clockwise.

Shaft (e.g. screwdriver)

Opening

Front

1-6-4

E592ADC

FIRMWARE RENEWAL MODE

FIRMWARE is built-in program to operate DVD player. To get rid of error when playing new software (disc) in the market, FIRMWARE version is updated. Perform the following to update the FIRMWARE version.

1. Turn the power on and remove the disc on the tray.

2. To put the DVD player into version up mode, press [9], [8], [7], [6], and [DIRECT SKIP] buttons on the remote control unit in that order. The tray will open automatically. Fig. a appears on the screen and Fig. b appears on the VFD.

" differ depending on the model

*******

F/W Version Up Mode Model No : *******

Please insert a DISC

for F/W Version Up.

Fig. a Version Up Mode Screen

VERSION : *.**

EXIT: POWER

The appearance shown in (*2) of Fig. c is described as follows:

AppearanceNo. State

Reading... Sending files into the memory

Erasing... Erasing previous version data Programming...

3 Writing new version data

5. After programming is finished, the tray opens automatically. Fig. e appears on the screen and the checksum in (*3) of Fig. e appears on the VFD. (Fig. f)

" differ depending on the model

*******

F/W Version Up Mode

VERSION : E5****_****.ab5 Completed

SUM : 7ABC (*3)

Fig. e Completed Program Mode Screen

Model No : ******* VERSION : *.**

ig. b VFD in Version Up Mod

The DVD player can also enter the version up mode with the tray open. In this case, Fig. a will be shown on the screen while the tray is open.

3. Load the disc for version up.

4. The DVD player enters the F/W version up mode automatically. Fig. c appears on the screen and Fig. d appears on the VFD. If you enter the F/W for different models, "Disc Error" will appear on the screen, then the tray will open automatically.

" differ depending on the model

*******

F/W Version Up Mode Model No : *******

VERSION : E5****_****.ab5 Reading...(*2)

Fig. c Programming Mode Screen

ig. d VFD in Programming Mode (Exampl

VERSION : *.**

ig. f VFD upon Finishing the Programming Mode (Exampl

At this time, no buttons are available.

6. Remove the disc on the tray.

7. Unplug the AC cord from the AC outlet. Then plug it again.

8. Turn the power on by pressing the [OPERATE] button and the tray will close.

9. Press [1], [2], [3], [4], and [ON SCREEN] buttons on the remote control unit in that order. Fig. g appears on the screen.

" differ depending on the model

*******

MODEL : *******

Version Region

: *.**

: *

EXIT: POWEREEPROM CLEAR : CLEAR

Fig. g

10.Press [CLEAR] button on the remote control unit. Fig. h appears on the screen.

1-7-1

E5945TEST

" differ depending on the model

*******

MODEL : *******

Version Region

: *.**

: *

EXIT: POWEREEPROM CLEAR : CLEAR

EEPROM CLEAR : OK

Fig. h

When "OK" appears on the screen, the factory default will be set. Then the firmware renewal mode is complete.

11.To exit this mode, press [OPERATE] button.

1-7-2

E5945TEST

FLOW CHART NO.1

The power cannot be turned on.

TROUBLESHOOTING

Is the fuse normal?

Yes Is normal state restored when once unplugged power cord is plugged again after several seconds?

Yes Is the EV +3.3V line voltage normal?

Yes Check each rectifying circuit of the secondary circuit and service it if defective.

FLOW CHART NO.2

The fuse blows out.

Check the presence that the primary component is leaking or shorted and service it if defective.

After servicing, replace the fuse.

FLOW CHART NO.3

When the output voltage fluctuates.

Does the photo coupler circuit on the secondary side operate normally?

Yes

Check IC1001, D1012, D1024 and their periphery, and service it if defective.

See FLOW CHART No.2 <The fuse blows out.>

Check if there is any leak or short-circuiting on the primary circuit component, and service it if defective (Q1001, Q1003, Q1008, T1001, D1001, D1002, D1004, D1005, D1011, C1003, C1005)

Check the presence that the rectifying diode or circuit is shorted in each rectifying circuit of secondary side, and service it if defective.

Check IC1001, IC1006, D1048 and their periphery, and service it if defective.

FLOW CHART NO.4

When buzz sound can be heard in the vicinity of power circuit.

Check if there is any short-circuit on the rectifying diode and the circuit in each rectifying circuit of the secondary side

, and service it if defective.

FLOW CHART NO.5

-FL is not outputted.

Is approximately -23V voltage supplied to the anode of D1003?

Check if there is any leak or short-circuit on the loaded circuit, and service it if defective.

(D1003, D1006, D1008, D1016, D1030, IC1002, Q1002, Q1004, Q1005, Q1011)

Yes

Check D1003 and periphery circuit, and service it if defective.

1-8-1

E592ATS

FLOW CHART NO.6

P-ON+10V (EV+11V) is not outputted.

Is 11V voltage supplied to the emitter of Q1002?

Yes Is the voltage of base on Q1002 lower than the voltage of emitter on Q1002 when turning the power on?

Yes Replace Q1002.

FLOW CHART NO.7

P-ON+5V is not outputted. (EV+11V is outputted normally.)

Is the "H" signal inputted into the base of Q1004?

Yes Replace Q1004.

FLOW CHART NO.8

P-ON+3.3V is not outputted. (P-ON+10V is outputted normally.)

Is 3.3V voltage supplied to the collector of Q1011?

Yes Replace Q1011 or R1067.

Check D1030, D1048, C1035, C1048, L1007, and the periphery circuit, and service it if defective.

Check Q1016 and PWRCON line and service it if defective.

Check R1068 and D1046, and service it if defective

Check D1008, C1007, C1038, L1007, and the periphery circuit, and service it if defective.

FLOW CHART NO.9

EV+5V is not outputted.

Is EV+11V outputted normally?

Yes Check D1047 and the periphery circuit, and service it if defective.

FLOW CHART NO.10

EV+1.2V is not outputted.

Is 2.5V voltage supplied to Pin(1) of IC1002?

Yes

Replace IC1002.

Refer to "FLOW CHART NO.6" <P-ON+10V (EV+11V) is not outputted.>

Check D1006, C1014, L1008 and the periphery circuit, and service it if defective.

1-8-2

E592ATS

FLOW CHART NO.11

The fluorescent display tube does not light up.

Is 3.3V voltage supplied to Pins(6,24) of IC2001?

Yes

Is the voltage of approximately -20V supplied to Pin(15) of IC2001?

Yes

Is there 500kHz oscillation at Pin(26) of IC2001?

Yes

Are the filament voltage supplied between Pins(1, 2) and Pins(29, 30) of the fluorescent display tube? And the negative voltage applied between these pins and GND?

Yes

Replace the fluorescent display tube.

FLOW CHART NO.12

The key operation is not functioning.

Check the EV+3.3V line and service it if defective.

Check the -FL (-20V) line and service it if defective

Check R2002, IC2001 and their periphery, and service it if defective.

Check D1016, D1017, T1001, and their periphery, and service it if defective.

Is -15V voltage supplied to collector of Q1005?

Yes

Is the "H" signal inputted to base of Q1016?

Check Q1015, Q1016, D1055, and their periphery, and service it if defective.

Yes

Check PWRCON line, and service it if defective.

Are the contact point and the installation state of the key switches (SW2101, SW2104-2108) normal?

Yes

When pressing each switches (SW 2108

), do the voltage of each pin of IC2001 (shown below) increase? SW2104, 2106, 2107: IC2001 3PIN SW2101, 2105, 2108: IC2001 4PIN

Yes

Replace IC2001.

FLOW CHART NO.13

No operation is possible from the remote control unit.

Operation is possible from the DVD, but no operation is possible from the remote control unit.

Is 5V voltage supplied to Pin(3) terminal of the infrared remote control receiver (RM2001)?

Yes Is the "L" pulse sent out Pin(1) terminal of receiver (RM2001) when the infrared remote control is activated?

Yes

Is the "L" pulse supplied to the Pin(22) of CN1001?

Yes

Replace DVD Main CBA.

2101, SW2104-

Re-install the switches ( correctly or replace the poor switch.

Check the switches ( their periphery, and service it if detective.

Check EV+5V line and service it if defective.

Replace the infrared remote control receiver (RM2001) Or replace the remote control unit.

Check the line between Pin(1) terminal of receiver (RM2001) and Pin(22) of CN1001, and service it if defective.

SW2101, SW2104-2108

)

) and

1-8-3

E592ATS

+ 40 hidden pages