Hisense LCD3203EU Manuale utente

LCD3203EU

SERVICE MANUAL

(V1.0)

January 2005

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CONTENTS

1. SAFETY PRECAUTION……………………………………………………….………3

2. PRODUCT SAFETY NOTICE…………………………………………………………3

3. BLOCK DIAGRAM…………………………………..………………………………..4

4. FUNCTION OF CONJUNCTIONS………………………………………….………. .5

5. SIGNAL DIAGRAM…………………………………..………………………………..9

6. TROUBLESHOOTING………………………………………………………………..10

7. SERVICE MODE MENU………………..……………………………….……………..11

8. PART LIST……………..…………………………..…………………….……………..12

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SAFETY PRECAUTION

WARNING:

Service should not be attempted by anyone unfamiliar with the necessary precaution on

thisreceiver. The following are the necessary precautions to be observed before servicing this

chassis.

1. When replacing a chassis in the cabinet, always be certain that all the protective devices are

put back in place, such as: non-metallic control knobs, insulating covers, shields,

isolation resistor-capacitor network etc.

2. When replacing parts or circuit boards, disconnect the power cord.

3. When replacing a high wattage resistor (oxide metal film resistor) on the circuit board, keep

the resistor 10mm (1/2in) away from circuit board.

4. Connection wires must be kept away from components with high voltage or high temperature.

5. If any fuse in this TV receiver is blown, replace it with the FUSE specified in the chassis parts

list.

PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in the chassis have special safety-related characteristics.

These characteristics are often passed unnoticed by a visual inspection.

Replacement parts which have these special safety characteristics are identified in this manual

and its supplement electrical components having such features are shaded on the schematic

diagram and the parts list.

Before replacing any of these components, read the parts list in this manual carefully. The use of

substitute replacement parts which do not have the same characteristic as specified in the parts

list may create shock, fire or other hazards.

CAUTION: BEFORE SERVICING THE CHASSIS, READ THE “SAFETY

PRECAUTION” “PRODUCT SAFETY NOTICE”ON PAGE 1 OF THIS

MANUAL.

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BLOCK DIAGRAM

12 3

XS001

POWER

BOARD

MAIN

BOARD

XPK01

KEY

BOARD

TUNE

BOARD

(393A)

LCD

000

XP7 XP4 XP6

000

XP608 XP607 XP610

814 12

000

XP609

000 000

XPE005 XPE006

right

left

REMOTE

BOARD(467A)

000

XP606

XP08

4(earphone line)

(530)

(

526

)

(531)

SCART OUTPUT

BOARD(466A)

000000

XP616 XP617 XP612

SP305 SP302 SP303

XP613

SP304

5125

000

XP8

000 000

000

XP611

XP04

XPE004

000 000000

XP15

XP16 XP17

XPE001

XPE003 XPE002 Inverter

line

Inverter

line

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FUNCTION OF CONJUNCTIONS

XPE003---XP16

ITEM NAME FUNCTION

1 +12V Panel power

2 +12V Panel power

3 5V Main board power(no use )

4 5V Main board power(no use )

5 POWER_ON Control POWER to standby

6 GND

7 GND

XPE001---XP15

ITEM NAME FUNCTION

1 +5V_M Main board power

2 +5V_M Main board power

3 GND

4 GND

XPE002---XP17

ITEM NAME FUNCTION

1 BRI Luminance regulation 0V~3.3V

2 PWM PWM Dimming

3 ON\OFF Backlight On~Off 0V~5V

4 GND

5 GND

XP7---XP608

ITEM NAME FUNCTION

1 T_SDA For SDA5550(N605) I2C SDA

2 T_SCL For SDA5550(N605) I2C SCL

3 SW0

Switch of TEXT and SCART2(R、G、B)

4 MUTE Be used to mute

5 SW1 SCART1 identify automatically

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6 SW2 SCART2 identify automatically

7 GND

8 SW3 SDA5550 reset

XP4---XP607

ITEM NAME FUNCTION

1 GND

2 C_IN SCART2 C input

3 GND

4 Y_IN SCART2 Y input

5 GND

6 AV1 SCART1 AV input

7 GND

8 AV2 SCART2 AV input

9 GND

10 TV_IN TV from TUNER

11 GND

12 PR HDTV component input

13 PB HDTV component input

14 Y HDTV component input

XP6---XP610

ITEM NAME FUNCTION

1 VVS To SDA5550

2 VHS

3 GND

4 SDA For MSP3410( N600) I2C SDA

5 SCL For MSP3410( N600) I2C SCL

6 GND

7 R_IN

SCART2(R、G、B) input

8 G_IN

SCART2(R、G、B) input

9 B_IN

SCART2(R、G、B) input

10 FB_IN

11 GND

12 VOUT Video output

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XP12

ITEM NAME FUNCTION

1 GND

2 GND

3 TXA0- LVDS signal

4 TXA0+ LVDS signal

5 GND

6 TXA1- LVDS signal

7 TXA1+ LVDS signal

8 GND

9 TXA2- LVDS signal

10 TXA2+ LVDS signal

11 GND

12 TXAC- LVDS signal

13 TXAC+ LVDS signal

14 GND

15 TXA3- LVDS signal

16 TXA3+ LVDS signal

17 GND

18 GND

19 +12V

20 +12V

21 +12V

22 +12V

23 MODE Mode selection

24 MODE Mode selection

25 GND

26 GND

XPK01---XP8

ITEM NAME FUNCTION

1 +3.3V

2 ADC1 Key code input

3 IR1 Remote code input

4 +5V

5 RED Power indicator light

6 GND

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7 BLU Power indicator light

8 GND

XPE005、XPE006

ITEM NAME FUNCTION

1 Power

Supply+24V

2 Power

Supply+24V

3 Power

Supply+24V

4 Power

Supply+24V

5 Power

Supply+24V

6 GND

7 GND

8 GND

9 GND

10 GND

11 VBR

0V~3.3V Luminance regulation 0V~3.3V

12 On/Off

0V~5V Backlight On~Off 0V~5V

XPE004---XP611

ITEM NAME FUNCTION

1 +15V TDA7266 power

2 +15V TDA7266 power

3 GND

4 GND

5 +12V

6 GND

7 +5V

8 GND

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SIGNAL DIAGRAM

A600

N600

MSP3410

N603

TDA7266B

2SIF

AUDIO

N604

TDA2822

MUTE

V603 V604

CVBS LCD

VPC3230

N605

SDA5550

VIDEO(SCART)

S-VIDEO(SCART2)

LVDS

N601

PI5V330

VGA

DVI

YPbPr

RGB(SCART1)

TUNER

GM1501

PI5V330

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TROUBLESHOOTING

yes yes

no no

red

blue

YES

O PICTURE

is there noise

icture?

Is indicato

light red o

blue?

VGA o

HDTV OK?

Main board is

Tuner board is

Antrnna/cable

ok? tuner board is

Is there

signal ？

Check the Antrnna/cable connection

Check the main board

Check the signal connection

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