Toshiba SD-P1800 Service Manual

SERVICE MANUAL

DOCUMENT CREATED IN JAPAN, SEPT., 2005

PORTABLE DVD PLAYER

SD-P1800

FILE NO. 810-200575

Rev.00

DIGITAL VIDEO

(USA)

Sep., 2005

LASERBEAMCAUTIONLABEL

Whenthepowersupplyisbeingturnedon,youmaynotremovethislasercautionslabel.Ifitremoves,radiationoflaser

maybereceived.

PREPARATIONOFSERVICING

PickupHeadconsistsofalaserdiodethatisverysusceptibletoexternalstaticelectricity.

Althoughitoperatesproperlyafterreplacement,ifitwassubjecttoelectrostaticdischargeduringreplacement,

itslifemightbeshortened.Whenreplacing,useaconductivemat,solderingironwithgroundwire,etc.to

protectthelaserdiode

Andalso,theLSIandICaresameasabove.

fromdamagebystaticelectricity.

Solderingiron
withgroundwire
orceramictype

Conductivemat

Groundconductive
wriststrapforbody.

1M

Thegroundresistance
betweenthegroundline
andthegroundislessthan10

SAFTY NOTICE

LEAKAGE CURRENT CHECK

SAFTY PRECAUTIONS

Plug the AC line cord directly into a 120V AC outlet (do

not use an isolation transformer for this check). Use an

AC voltmeter, having 5000 per volt or more sensitivity.

Connect a 1500 10W resistor,paralleled by a 0.15uF

150V AC capacitor between a known good earth ground

(water pipe, conduit, etc.) and all exposed metal parts of

cabinet (antennas, handle bracket, metal cabinet

screwheads, metal overlays, control shafts, etc.).

READING SHOULD NOT EXCEED 0.3V

DVD VIDEO PLAYER

Measure the AC voltage across the 1500 resistor.

The test must be conducted with the AC switch on and

then repeated with the AC switch off. The AC voltage

indicated by the meter may not exceed 0.3V.A reading

exceeding 0.3V indicates that a dangerous potential

exists, the fault must be located and corrected.

Repeat the above test with the DVD VIDEO PLAYER

power plug reversed.

NEVER RETURN A DVD VIDEO PLAYER TO THE

CUSTOMER WITHOUT TAKING NECESSARY

CORRECTIVE ACTION.

AC VOLTMETER

(5000 per volt
or more sensitivity)

Good earth ground

1500
10W

such as a water pipe,
conduit, etc.

AC OUTLET

0.15uF 150V AC

Test all exposed metal.
Voltmeter Hook-up for Leakage Current Check

The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated "dangerous voltage" within the
product's enclosure that may be of sufficient magnitude to
constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the appliance.

LCD

1

2

1 2 3 4 5 6 7 8 91011121314151617181920212223242526272829

TFT+17VNC3.3V

TFT GND

TFT-13VNCSTV1

V/D

CKV

OEV

OEV

OEV

STV2

VCOMS

TFT GND

VEE

STH2

L/R

CPH1

CPH1

CPH1

MODE

3.3V

OEH

LCD B

LCD G

1

2

1 2 3 4 5 6 7 8 91011121314151617181920212223242526272829

LCD R

VBS

30

STH1

VCOMS

30

BATTERY

123

BATT+TSGND

123

XS102

4

GND

4

XS5

XS6

1 2 3 4 5 6 7 8 9101112131415

HVHVBRIGHT

TFT on/off

GND

GND

SPR+

SPR-

SPL+

SPL-

GND

TFT+17V

GND

TFT-13V

GND

1 2 3 4 5 6 7 8 9101112131415

JS3

XS2

XS1

1 2 3 4 5 6 7 8 910111213141516171819

VCOMS

GND

TFT5V

TFT3.3V

GND

LCD G

LCD B

LCD R

GND

L/R

V/D

STV1

STV2

OEV

CKV

OEH

STH1

STH2

GND

1 2 3 4 5 6 7 8 910111213141516171819

JS5

MAIN PCB

INVERTER PCB

20

CPH1

20

XS1

1 2 3 4 5 6 7 8 91011121314151617181920212223

NC

DVDVCC

V20

GNDFE

CD/DVD SW

RFCDBA

1 2 3 4 5 6 7 8 91011121314151617181920212223

CDMD

DVDMDMDCDLD

GND

DVDLDNCAVCC

FCS-

TRK+

TRK-

24

FCS+

24

XS008

1 2 3 4 5

SP-

SP+

SL+

SL-

1 2 3 4 5

6

GND

LIMIT

6

1234567

KEYIN3

1234567

MECHANISM

KEYIN2

KEYIN1

KEYIN0

XS101

8

KEYOUT0

KEYOUT1

KEYOUT2

KEYOUT3

8

FUNCTION BUTTON PCB

OSCILLATOR

OZ9930

DC 9V

HIGH VOLTAGE ASS'Y

TFT MONITOR

VIDEO OUT

COAXIAL OUT

AUDIO OUT

AUDIO AMP

(AZ4558)

PHONE OUT

SPEAKER LOUT

SPEAKER ROUT

SPEAKER AMP

TPA6011

27MHz

27MHz

27MHz

74HCU04

64M SDRAM

HY57V641620HGT-7

UPD5500

+5V

+3.3V

+1.8V

L

TFT POWER

+3.3V +5V +2.5V +16V -13V

L

R

AUDIO D/A

(PCM1753)

AUDIO +5V

R

AUDIO +/-5V

BATTERY

+5V

(VG202C)

(TPC8207)

(BQ2057C)

8M FlashROM

MX26LV800BTC-55

RF AMP & SERVO & DVD PROCESSOR

MPEG-2 DECODER & VIDEO ENCODER

MT1389SE

TC4W53

DV23(HD80)

OVERALL BLOCK DIAGRAM

PU mechanism

+5V

DRIVER +5V

DRIVER

(BA5888FP)

AC

110~240V

50/60Hz

DC / DC

Adapter

DC IN +9V

1. Troubleshooting

1. No power when turned on.

2. The initial screen is not displayed on the LCD.

3. The DVD drive does not work.

4. The operation of the DVD player stops at initializing display.

5. Image output stops during the operation.

6. No sound or abnormal sound comes out from the speakers in the DVD player.

7. No image or sound comes out from the external output.

8. No sound comes out from the headphones.

9. No image or sound is output by external input.

10. The DVD drive does not operate with the battery.

1.1 No power when turned on.

When the power is turned on, and if the LED on the front panel does not light green, check
the following items and repair the defective parts.

(1) Check the power supply cable

If the cable is not the supplied one, replace it with the supplied cable and turn on the
power again.
If the power supply cable is good, the AC adapter may be defective.
If the LED does not light after replacing, check the following items.

(2) Check the AC adapter

If the AC adapter is not the supplied one, replace it with the supplied AC adapter and
turn on the power.
If the AC adapter is good, the main board may be defective.
If the LED does not light after replacing, check the following items.

(3) Replace the main board

1.2 The initial screen is not displayed on the LCD.

If the initial screen is not displayed on the LCD, check the following items.

(1) Check the LED on the front

If the LED does not light, proceed to 1.1.

(2) Check the backlight

If the backlight does not light up, separate the DVD player into top assembly and
bottom assembly, and check the connector harness, and check the connectors for
defects.

If the connector harness is broken:

Replace the broken harness.

If the connector harness is not broken:

Remove the LCD cover and plate of the LCD unit and check the following:

zCheck the connector of the FL harness, replace the FL inverter or the LCD.
zIf the connectors are good, replace the FL inverter or the LCD.

(3) Check the lighting of LCD

If the LCD does not light, separate the DVD player into the top assembly and bottom
assembly, and check the LCD harness, and check the connectors on the main board.

If the connector is broken:

Replace the LCD harness or the main board.

If the connector is not broken:

Remove the LCD cover and plate of the LCD unit, and check the connection to the

harness of the LCD unit.

zIf a bad connection is found.

Connect the LCD harness to the LCD unit.

zOther than the above

Replace the LCD unit or the main board.