Philips 20MF251W-27 Schematic

Published by JH 0664 TV Service Printed in the Netherland Subject to modification EN 3122 785 16372

Copyright 2006 Philips Consumer Electronics B.V. Eindhoven, The Netherlands. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips.

Color Television Chassis

SHA2.0U

Contents Page

1. Technical Specifications, Connections,

and Chassis Overvie

2. Safety instructions, Warnings, and Notes 4

3. Directions for Use 5

4. Mechanical instructions 6

Service Mode, Error Codes, and Faultfinging 10

6. Block Diagrams, Testpoint Overviews, and

Waveforms

Wiring Diagra Block Diagram 20 Testpoint Overview (Top Side) 21 I2C IC Overview 22 Supply Voltage Overvie

Circuit Diagrams and PWB Layout

MB: MSP3420G Audio BTSC (Diagram A1 MB: MM502 MCU (Diagram A2 MB: TVP5147 DECODER (Diagram A3 MB: MST61510A/LF SCALER (Diagram A4 MB: AUDI MB: INTERFAC MB: POWE TV key board / Remote board (Diagram B/C Power boar HV Power boar DVD Main board (Diagram G DVD key boar DVD out boar DVD power boar

O (Diagram A5) 28 31-36

R (Diagram A7) 30 31-36

d (Diagram D) 39 40-41

w 2

m 18

w 23

s Diagram PWB

) 24 31-36 ) 25 31-36 ) 26 31-36 ) 27 31-36

E (Diagram A6) 29 31-36

) 37 38

d (Diagram E) 42 43-44

) 45 46-51

d (Diagram H) 52 53

d (Diagram I) 54 55

d (Diagram J) 56 57

Contents Page

Alignments 58-61

9. Circuit Descriptions 62 Abbreviation Lis

IC Data Sheets 63

. Spare parts List 64

. Revision List 75

t 63

EN 2 SHA2.0U LA1.

Technical Specifications, Connections, and Chassis Overview

1. Technical Specifications, Connections, and Chassis Overview

Index of this chapter:

1.1 Technical Specifications

1.2 Connections

1.3 Chassis Overview

Note: Figures below can deviate slightly from the actual situation, due to the different set executions.

1.1 Technical Specifications

1.1.1 Vision

Display type : TFT LCD Screen size : 20" (50.9 cm), 16:9 Resolution (HxV pixels) Contrast ratio : 600:1 Light output (cd/m

) : 350 Response time (ms) : 8 Viewing angle (LxRxUxD degrees) : 80x80x80x80 Tuning system : Electric tuning system TV color systems : NTSC Supported inputs : VGA (640x480) 60Hz

Channel selections : 181 presets

Aerial input : 75 ohm, Coax

: 1366x768

: VGA (640x480) 70Hz : VGA (640x480) 75Hz : VGA (800x600) 60Hz : VGA (800x600) 70Hz : VGA (800x600) 75Hz : VGA (1024x768) 60Hz : VGA (1024x768) 70Hz : VGA (1024x768) 75Hz : VGA (720x400) DOS

: VHF/UHF

: F-type

1.2 Connections

Note: The following connector color abbreviations are used

(acc. to DIN/IEC 757): Bk= Black, Bu= Blue, Gn= Green, Rd= Red, Wh= White, and Ye= Yellow

1.2.1 Rear I/O Connections

Figure 1-1 Rear connections

Hosiden: SVHS (Input)

1 - Ground Y Gnd 2 - Ground C Gnd 3 - Video Y 1 V 4 - Video C 0.3 V

Cinch (Input)

Ye - Video CVBS 1 V Wh - Audio L 0.5 V Rd - Audio R 0.5 V

Head phone (Output)

Bk - Head phone 10 mW / 32 ohm

VGA: Video 2fH RGB - In

PP/ 75 ohm

RMS/ 10kohm RMS/ 10kohm

3.5mm

1.1.2 Sound

Sound systems : MTS + SAP Maximum power (W

RMS)

: 2 x 3 W

1.1.3 Miscellaneous

Power supply:

- AC Power voltage (V

AC) : 100 - 240

- AC Power frequency (Hz) : 50/60

Ambient conditions:

- Temperature range : +5 to +35

- Maximum humidity : 5%-90% R.H.

Power consumption

- Power consumption (TV) : < 62 W (typ)

- Power consumption (TV with DVD) : < 68 W (typ)

Dimensions (WxHxD inch) With stand : 20" - 20.6x16.5x8.3(inch) Without stand

: 20" - 20.6x16.5x3.6(inch)

Weight : 20.5 Pound

Figure 1-2 VGA Connector

- Video Red 0.7 VPP / 75 ohm

2 - Video Green 0.7 V 3 - Video Blue 0.7 V

PP / 75 ohm PP / 75 ohm

4 - n.c. 5 - Ground Gnd 6 - Ground Red Gnd 7 - Ground

Green Gnd 8 - Ground Blue Gnd 9 - +5V_DC +5V

10 - Gnd Sync Gnd 11 - n.c. 12 - GDDCD

DDC data 13 - H-sync 0 - 5 V 14 - V-sync 0 - 5 V 15 - GDDCC

DDC clock

Audio In: Audio L/R In

Bk - Audio L/R 0.5 V

RMS /10 kohm

Aerial - In

- - F-type Coax, 75 ohm

Technical Specifications, Connections, and Chassis Overview

EN 3SHA2.0U LA 1.

AV1 IN: SVHS Video 1fH Y/C - In

1 - Ground Y Gnd 2 - Ground C Gnd 3 - Video Y 1 V 4 - Video C 0.3 V

AV1 IN: Video 1fH CVBS - In

Ye - Video CVBS 1 V Wh - Audio L 0.5 V Rd - Audio R 0.5 V

1.3 Chassis Overview

POWER BOARD

HV POWER BOARD

PP/ 75 ohm

RMS/ 10kohm RMS/ 10kohm

AV2 Cinch: Video 1fH YPbPr - In, Audio - In

Whh - Audio L 0.5 V Rd - Audio R 0.5 V Bu - Video Pb 0.7 V Rd - Video Pr 0.7 V Gn - Video Y 1 V

RMS / 10 kohm RMS / 10 kohm PP / 75 ohm PP / 75 ohm

PP / 75 ohm

TVK BOARD

MAIN BOARD

RMC BOARD

IF BOARD

DVD POWER BOARD

DVD MIAN BOARD

Figure 1-3 PWB / CBA locations

DVD OUT BOARD

DVD KEY BOARD

Figure 1-4 PWB / CBA locations

EN 4 SHA2.0U LA2.

Safety Instructions, Warnings, and Notes

2. Safety Instructions, Warnings, and Notes

2.1 Safety Instructions

Safety regulations require that during a repair:

Connect the set to the AC Power via an isolation transformer (> 800 VA). Replace safety components, indicated by the symbol , only by components identical to the original ones. Any other component substitution (other than original type) may increase risk of fire or electrical shock hazard.

Safety regulations require that returned in its original condition. Pay in particular attention to the following points:

Route the wire trees correctly and fix them with the mounted cable clamps. Check the insulation of the AC Power lead for external damage. Check the strain relief of the AC Power cord for proper function. Check the electrical DC resistance between the AC Power plug and the secondary side (only for sets which have a AC Power isolated power supply):

1. Unplug the AC Power cord and connect a wire

between the two pins of the AC Power plug.

2. Set the AC Power switch to the "on" position (keep the

AC Power cord unplugged!).

3. Measure the resistance value between the pins of the

AC Power plug and the metal shielding of the tuner or the aerial connection on the set. The reading should be between 4.5 Mohm and 12 Mohm.

Switch "off" the set, and remove the wire between the

two pins of the AC Power plug. Check the cabinet for defects, to avoid touching of any inner parts by the customer.

2.2 Warnings

All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD ). Careless handling during repair can reduce life drastically. Make sure that, during repair, you are connected with the same potential as the mass of the set by a wristband with resistance. Keep components and tools also at thissame potential. Available ESD protection equipment: – Complete kit ESD3 (small tablemat, wristband,

connection box, extension cable and earth cable) 4822

310 10671. – Wristband tester 4822 344 13999. Be careful during measurements in the high voltage section. Never replace modules or other components while the unit is switched "on". When you align the set, use plastic rather than metal tools. This will prevent any short circuits and the danger of a circuit becoming unstable.

2.3 Notes

2.3.1 Lead Free Solder

Philips CE is going to produce lead-free sets (PBF) from

1.1.2005 onwards. Lead-free sets will be indicated by the PHILIPS-lead-free logo on the Printed Wiring Boards (PWB):

after a repair, the set must be

This sign normally has a diameter of 6 mm, but if there is less space on a board also 3 mm is possible.

In case of doubt wether the board is lead-free or not (or with mixed technlogies), you can use the following method:

Always use the highest temperature to solder, when using SAC305 (see also instructions below). indicates 2.2 kohm). De-solder thoroughly (clean solder joints to avoid mix of

two alloys). Caution: For BGA-ICs, you must use the correct temperatureprofile, which is coupled to the 12NC. For an overview of these profiles, visit the website www.atyourservice.ce.philips.com (needs subscription, but is not available for all regions) You will find this and more technical information within the "Magazine", chapter "Workshop information". For additional questions please contact your local repairhelpdesk. Due to lead-free technology some rules have to be respected by the workshop during a repair:

Use only lead-free soldering tin Philips SAC305 with order

code 0622 149 00106. If lead-free solder paste is required,

please contact the manufacturer of your soldering

equipment. In general, use of solder paste within

workshops should be avoided because paste is not easy to

store and to handle.

Use only adquate solder tools applicable for lead-free

sodering tin. The solder tool must be able

– To reach at least a solder-tip temperature of 400˚C.

–

– To exchange solder-tips for different applications.

Adjust your solder tool so that a temperature around 360˚C

- 380˚C is reached and stabilised at the solder joint.

Heating time of the solder-joint should not exceed ~ 4 sec.

Avoid temperatures above 400˚C, otherwise wear-out of

tips will rise drastically and flux-fluid will be destroyed. To

avoid wear-out of tips, switch "off" unused equipment or

reduce heat.

Mix of lead-free soldering tin/parts with leaded soldering

tin/parts is possible but PHILPS recommends strongly to

avoid mixed regimes. If not to avoid, clean carefully the

solder-joint from old tin and re-solder with new tin.

Use only original spare-parts listed in the Service-Manuals.

Not listed standard material (commodities) has to be

purchased at external companies.

Special information for lead-free BGA ICs: these ICs will be

delivered in so-called "dry-packaging" to protect the IC

against moisture. This packaging may only be opened

short before it is used (soldered). Otherwise the body of the

IC gets "wet" inside and during the heating time the

structure of the IC will be destroyed due to high (steam-

)pressure inside the body. If the packaging was opened

before usage, the IC has to be heated up for some hours

(around 90˚C) for drying (think of ESD-protection !).

Do not re-use BGAs at all!

For sets produced before 1.1.2005, containing leaded

soldering tin and components, all needed spare parts will

be available till the end of the service period. For the repair

of such sets nothing changes.

Figure 2-1 Lead-free logo

To stabilise the adjusted temperature at the solder-tip.

2.3.2 Practical Service Precautions

It makes sense to avoid exposure to electrical shock.

While some sources are expected to have a possible dangerous impact, others of quite high potential are of limited current and are sometimes held in less regard. Always respect voltages. While some may not be dangerous in them selves, they can cause unexpected reactions - reactions that are best avoided. Before reaching into a powered TV set, it is best to test the high voltage insulation. It is easy to do, and is a good service precaution.

3. Directions for Use

You can download this information from the following websites:

http://www.philips.com/support

Directions for Use

EN 5SHA2.0U LA 3.

EN 6 SHA2.0U LA4.

Mechanical Instructions

4. Mechanical Instructions

Index of this chapter:

4.1 Cable Dressing

4.2 Service Positions

4.3 Assy/Board Removal

4.4 Set Re-assembly

4.1 Cable Dressing

Notes:

• Figures below can deviate slightly from the actual situation,

due to the different set executions.

• Follow the disassemble instructions in described order.

4.2 Service Positionsrvice Positions

For easy servicing of this set, there are a few possibilities created:

• The buffers from the packaging (see figure "Rear cover").

• Foam bars (created for service).

Figure 4-1 Cable dressing

Figure 4-2 Cable dressing

4.2.1 Foam Bars

The foam bars (order code 3122 785 90580 for two pieces) can be used for all types and sizes of Flat TVs. By laying the TVe face down on the (ESD protective) foam bars, a stable situation is created to perform measurements and alignments. By placing a mirror under the TV, you can monitor the screen.

Figure 4-3 Foam bars

Mechanical Instructions

EN 7SHA2.0U LA 4.

4.3 Assy/Board Removal

4.3.1 DVD Assy

Warning: Disconnect the AC Power cord before you open the set.

1. Place the TV set upside down on a table top, using the

foam bars (see part "Foam Bars"). Caution: do not put pressure on the display, but let the monitor lean on the the Front cover.

2. Remove all screws from the DVD Assy.

3. Then, disconnect the cables from the DVD Assy.

4. Lift the DVD Assy from the set.

4.3.2 Rear Cover

1. Remove the screws that secure the rear cover.

2. Disconnect the cable from the TVK board. Lift the rear

cover from the cabinet.

3. Remove the screws that secure the main board shield cover.

The screws are located at the top, bottom, left and right sides. Make sure that wires are not damaged during removal.

4.3.3 Main Board Figure 4-4 (1)

1. Disconnect the cable from the Main board.

2. Remove the fixation screws.

3. Take out the Main board.

4.3.4 Power Board Figure 4-4 (2)

1. Disconnect the cable from the Main board.

2. Remove the fixation screws.

3. Take out the Power board.

4.3.8 LCD TFT Figure 4-5 (2)

Important: Be sure to work in a dust free environment during

the following activities. In addition, the use of (fabric) hand gloves is advised.

4.3.9 DVD Top Cover Figure 4-6 (1)

Figure 4-5 TV disassembly

1. Remove the screws that secure the DVD top cover.

Make sure that wires and flat foils are not damaged during removal.

2. Disconnect the cable from the DVD key board. Lift the

DVD top cover from the cabinet.

4.3.5 RMC Board Figure 4-4 (3)

1. Disconnect the cable from the RMC board.

2. Remove the fixation screws.

3. Take out the RMC board.

4.3.6 IF Board Figure 4-4 (4)

1. Disconnect the cable from the IF board.

2. Remove the fixation screws.

3. Take out the IF board.

Figure 4-4 TV disassembly

4.3.7 HV Power Board Figure 4-5 (1)

4.3.10 DVD Power Board Figure 4-7 (1)

4.3.11 DVD Out Board Figure 4-7 (2)

4.3.12 DVD Loading Assy Figure 4-7 (3)

Figure 4-6 DVD disassembly

1. Disconnect the cable from the DVD power board.

2. Remove the fixation screws.

3. Take out the DVD power board.

1. Disconnect the cable from the DVD out board.

2. Remove the fixation screws.

3. Take out the DVD out board.

1. Disconnect the cable from the DVD loading Assy.

2. Remove the fixation screws.

3. Take out the DVD loading Assy.

1. Remove the screws that secure the LCD TFT shield cover.

The screws are located at the top, bottom, left and right sides.

2. Disconnect the cable from the LCD TFT. Remove the

screws that secure the HV power board. Lift the HV power board from the LCD TFT shield cover.

EN 8 SHA2.0U LA4.

Mechanical Instructions

Figure 4-7 DVD disassembly

4.3.13 DVD Main Board Figure 4-8 (1)

1. Remove the screws that secure the DVD Main board.

Make sure that wires and flat foils are not damaged during removal.

2. Disconnect the cable from the DVD Main board. Lift the

DVD Main board from the DVD loading Assy.

Figure 4-8 DVD disassembly

4.4 Set Re-assembly

To re-assemble the whole set, execute all processes in reverse order.

Notes:

• While re-assembling, make sure that all cables are placed

and connected in their original position. See figure " Cable dressing".

Mechanical Instructions

EN 9SHA2.0U LA 4.

Exploded View

L K J

66 16 17

18 20

Q P

EN 10 SHA2.0U LA5.

Service Mode, Error Codes, and Faultfinding

5. Service Mode, Error Codes, and Faultfinding

Index of this chapter:

5.1 Service Mode

5.2 Error Codes

5.3 Faultfinding

5.1 Service Mode

ISP Instruction

Please set the unit to VIDEO mode before upgrade. Press " + V + < + > + MENU + OK" on the remote in turn to enter Factory

mode ( Figure 5-1).

PICTURE SOURCE ADC ADJ DIGITAL ADJ SMART PICTURE

COLOR TEMP

EEPROMRW ADDR .

DATA

SAVE

ISP

V-CHIP RESET VERSION : 04 / 15 / 06 17 : 29 : 24

Figure 5-1 Facture mode

Press " " or "V" to select "ISP" items, press ">" to enter "ISP" items ( Figure 5-2).

ISP NOW ...

AV1

000 28

Click "Create Security File" enter next interface as Figure 5-4. Input "7c" ,"4c", "77" in turn, click "OK" to exit the interface.

Figure 5-4 ISP upgrade interface

Select "MTV412M128", click "Load MCU File" to select upgrade file, than confirm read OK. (Figure 5-5)

Figure 5-2 Facture mode

Setup "port95NT_Win2000_XP.zip" driver program and "ISP_ driver _2.5a.zip" upgrade program. Run "ISP_ driver_2.5a" program. (Figure 5-3)

Figure 5-3 ISP upgrade interface

Figure 5-5 ISP upgrade interface

Service Mode, Error Codes, and Faultfinding

EN 11SHA2.0U LA 5.

Select "Enter ISP Mode" and click "RUN" to enter ISP mode, It show: "Enter ISP Mode...OK", If it clue to "Enter ISP Mode... Error", please check the connection of upgrade tongs and repeat currently step, tile It show: "Enter ISP Mode...OK". (Figure 5-6)

Figure 5-6 ISP upgrade interface

If it clue to "Error"(Figure 5-8), please click "RUN" to repeat currently step, tile It show: "OK".(Figure 5-7)

Figure 5-8 ISP upgrade interface

Click "Reset MCU" to exit ISP upgrade program.(Figure 5-9)

Select "Erase Targer" and "Program", click "RUN" to enter upgrade mode, upgrade be start. It show: "Erase Program ... OK""Clear CRC" "Program ... OK""Check CRC ... OK"(Figure 5-6)

Figure 5-7 ISP upgrade interface

Error Codes

5.2

No error codes necessary.

Figure 5-9 ISP upgrade interface

EN 12 SHA2.0U LA5.

5.3 Faultfinding

5.3.1. No work / LED is off

5.3.2. No work / LED is red

5.3.3. No raster / Picture too dim

5.3.4. No Picture / LED is blue

5.3.5. No TV Picture

5.3.6. No CVBS Picture

5.3.7. No HDTV Picture

5.3.8. No VGA / S-audio / CVBS-audio sound

5.3.9. No TV sound

5.3.10. No remote function

5.3.11. Function key poor

5.3.12. DVD driver no work

5.3.1 No work / LED is off

No work / LED is off

Service Mode, Error Codes, and Faultfinding

Check if power connection isnormal

Yes

Check if voltage of Power PCB CZ3, CZ4 is normal

Yes

Check if fuse F1 is normal

Yes

Check if RMC PCB is normal Replace RMC PCB

Yes

Replace power connection

Replace Power PCB

Replace fuse and eliminate short or open situation

Try to replace

N4,LN1

5.3.2 No work / LED is red

No work / LED is red

Service Mode, Error Codes, and Faultfinding

EN 13SHA2.0U LA 5.

Check if RMC PCB is normal

Yes

Check if voltage of N16,N26,N30 is normal

Yes

Replace Main PCB

5.3.3 No raster / Picture too dim

No raster / Picture too dim

Replace RMC PCB

Replace N16 or N26 or N30

Check if connector CN1 of HV power PCB pin1,2,3,4 is 24V

Yes Yes

Replace LCD panel

No No

Check if voltage of HV power PCB IC1 is normal

Replace LCD panel

Replace HV power PCB

EN 14 SHA2.0U LA5.

5.3.4 No Picture / LED is blue

No Picture / LED is blue

Service Mode, Error Codes, and Faultfinding

Check if backlight is normal

Yes

Check if connector of J1 is normal

Yes

Check if signal of LVDS is normal

Yes

Replace LCD panel

No No

Check if voltage of HV power PCB U1,U2 is normal

Yes

Replace HV power PCB

Replace J1

Replace Main PCB

Check the power and control signal of JP20 in main PCB is normal

Yes

Replace Main PCB

5.3.5 No TV Picture

No TV Picture

Check if voltage of N5 pin1 is 5V

Yes

Replace TVF1 HF

Yes

Go to connector 1

Replace N5

Replace Main PCB

5.3.6 No CVBS Picture

No CVBS Picture

Service Mode, Error Codes, and Faultfinding

EN 15SHA2.0U LA 5.

Check if signal of N14 pin2 is normal

Yes

Go to connector 1

Connecor 1

Check if signal of N10 pin54~61 is normal

Yes

Connector 2

5.3.7 No HDTV Picture

Replace Main PCB

No HDTV Picture

Check if signal of N32 pin7,9,12 is normal

Yes

Go to connector 2

Connecor 2

Check if signal of N9 is normal

Yes

Replace Main PCB

Replace N9

Replace Main PCB

EN 16 SHA2.0U LA5.

5.3.8 No VGA / S-audio / CVBS-audio sound

No VGA / S-audio / CVBS-audio sound

Service Mode, Error Codes, and Faultfinding

Check if signal of N1 pin47,48(VGA),pin50,51 (HDTV),pin53,54(S-video),pin56,57 (DVD),pin60,67(TV) is normal

Yes

Check if voltage of N1 pin11~13,65,66,80 is normal

Yes

Check if Z5 is 18.432MHz

Yes

Check if signal of N35 pin1,7 is normal

Replace circumjacent capacitor

Chech power supply

Replace Z5

Replace N35

Yes

Check if signal of N8 pin4,6 is normal

Yes

Replace Speaker

Replace N8

5.3.9 No TV sound

No TV sound

Service Mode, Error Codes, and Faultfinding

EN 17SHA2.0U LA 5.

Check if signal of N1 pin67 is normal

Yes

Go to connector 2

5.3.10 No rempte function

No remote function

Try another remote control

Yes

Check IR receiver

Replace Main PCB

Replace one good remote control

5.3.11 Function key poor

Function key poor

Check circuit around key PCB and cable

5.3.12 No HDTV Picture

DVD driver no work

Replace DVD loading

Block Diagrams, Testpoint Overviews, and Waveforms

6. Block Diagrams, Testpoint Overviews, and Waveforms

Wiring Diagram ( TV )

LCD TFT

EN 18SHA2.0U LA 6.

TV KEY PCB

HV PCB

AC POWER INAC POWER IN

POWER PCB

REMOTE PCB

TV MAIN PCB

TO DVD POWER PCB

TO SPEAKERS

TO DVD OUT PCB

IF PCB

Block Diagrams, Testpoint Overviews, and Waveforms

Wiring Diagram ( DVD )

EN 19SHA2.0U LA 6.

TO LCD MAIN PCB

DVD DECODER PCB

DVD POWER PCB DVD OUT PCB

DVD LOADING MECHANISM

DVD KEY PCB

Block Diagrams, Testpoint Overviews, and Waveforms

Block Diagram

EN 20SHA2.0U LA 6.

LCD TFT

S-VIDEO/CVBS L/R

AZ4558

AUDIO OUTPUT

AUDIO DAC PCM1742

AV Audio

YPbPr Audio

VGA Audio

Tuner

CVBS In

TUNER CVBS

MSP3420G Audio BTSC

TV_SIF

TVP5147 Decoder

I2c BUS

AUDIO DAC NJM4558

TDA1517 Amplifier

I2c BUS

24LC16 NVRAM

MCU MM502

Switch ADG774

8 bit

LCD TFT

LVDS

MST61510A/LF Scaler Processor

Flash ROM 64M bit

TC4W53

HCU04

27MHz

S-Video In

24LC21 NVRAM

27MHz

VGA In

SERVO & TRAY DRIVER

BA5888 & BA6287

SERVO & DVD PROCESSOR MPEG-2 DECODER & VIDEO ENCODER MT1389XE

EEPROM

24C04

16M FLASH

29F160

YPbPr In

YPbPr OUTPUT

64M SDRAM

DVD LCD PCB

Block Diagrams, Testpoint Overviews, and Waveforms

Testpoint Overview (Top Side)

5V5_OUT A_MUTE A_SW1 AV2_C AV2_F AV3_C AV3_V/Y AV4_V

D1 B5 E4 I6 I5 I6 I6 I6

1864109

AVHS AVVS BKLON DVD_B DVD_G DVD_RED HPLG_CTL HSYNC

J6 J6 E2 L4 L5 L4 D4 C3

2 1137 12

KEY-IN0 KEY-IN1 MCU+5V MINT N_C N_C1 P_EN P4_1

EN 21SHA2.0U LA 6.

D4 D4 C2 I5 I6 I5 E2 D4

P6-3 PH_L PH_R PWMOUT RMC-IN RMC_SW RSTN SCL

D3 K7 K8 I1 D4 D4 E6 D6

SCL1 SCL2 SCL3 SCL4 SDA T1 T2 T3

D6 D6 D6 D6 D6 I2 J4 J4

T4 T5 T6 T7 T8 T9 T10 T11

J4 K4 K3 K3 K3 K3 K4 L3

T12 T14 T15 T22 T23 T24 T25 T26

K3 K3 K3 J3 J3 J4 J4 J4

T27 T28 T29 T30 T31 T44 T46 T56

K5 K5 K5 K4 K5 H6 G1 G4

T57 T58 T59 T60 T61 T62 T63 T64 T65 T66 T67 T68 T69 T70 T71 T72 T73 T74 T75 T78 T81 T82 T83 T84 T87 T88 T94 T95 T96 T97 T98 T103 T110 T111 TUNER_AFC TV_AUDIO TV_SIF TV2 VCC_33 VGA/HDMI_SW VIDEO_OUT_SW VLCD VSYNC YUV/DVD_SW

G4 G4 G4 G4 G3 G5 G5 F5 E2 E3 E3 E3 E3 E3 E3 E3 E3 E3 E3 C3 D8 D8 E8 E8 D8 D9 D10 E10 E10 E10 D10 K6 F6 F7 E2 D7 D7 J7 G1 E4 C3 F2 C3 E3

DVD_RED

200mV / div DC

20us / div

1864109

DVD_G

200mV / div DC

2 1137 12

PH_L

20mV / div AC

20us / div

DVD_B

200mV / div DC

20us / div

HSYNC

1V / div DC

20us / div

1ms / div

PH_R

20mV / div AC

1ms / div

SCL

1V / div DC

20us / div

SDA

1V / div DC

20us / div

500mV / div DC

20us / div

500mV / div DC

20us / div

T10

500mV / div DC

20us / div

VSYNC

1V / div DC

5ms / div

5V5_OUT MCU+5V VLCD T1

5V5 5V 5V 1V8

Block Diagrams, Testpoint Overviews, and Waveforms

EN 22SHA2.0U LA 6.

I2C IC Overview

I2C BUS INTERCONNECTION DIAGRAM

INTERFACE

A6 A3 A1 A2

SDA5

SCL5

TVF1

TV TUNER

5V5_OUT

TVP5147 DECODER

29 28

MSP3420G AUDIO BTSC

R81R82

R232R231

MM502 MCU

R38 R39

13 14

DVD MAIN

A,B,C,D,E,F

RF1

XS1

TO DVD LOADING

J1 TO LCD TFT

MST61510A/LF SCALER

CLK+

RX3-

RX3+

JP24

VD25

BA50BC0FP

VD5

5V5_OUT

N14 TVP5147 DECODER

TDUBD[0,7]

D10 MST61510A SCALER

DATA

N13

HY57V643220DTP

SDRAM

ADDRESS

N1 MSP3420G AUDIO BTSC

BUD[0,3] WRZ RDZ BKLON YUV/DVD_SW

N9 MM502 MCU

+MCU5V

SDAE

SCLE

24LC16

EEPROM

N15

MT1389XE

ADDRESS

DATA

SDA

SCL

FM24CL04

EEPROM

ROM

M29LV160

FLASH

ROM

1511

JP24 VGA CONNECTOR

R121 R122

GDDCD

GDDCC

N19

24LC21A

EEPROM

R222

R221

MTXD

MRXD

ADDRESS

DATA

D11

HY57V641620

SDRAM

Block Diagrams, Testpoint Overviews, and Waveforms

EN 23SHA2.0U LA 6.

Supply Voltage Overview

POWER SUPPLY

DB1-4

IC02

CONTROL IC

7 11 14

3,4,5

6 15

TRANSFORMER

4,5

D11

RECTIFIER(5.7V)

D11

RECTIFIER(24V)

D12

RECTIFIER(12V)

LPF

D09

CONTROL A

LPF

D08

CONTROL B

5.7V

24V

POWER_ON

12V

HV board

24V

LN3

LN2

24V

N4 BA50

N16 MP1580

N30 MP1580

AMP_12V (TO N8)

5V7_UV

MAIN BORAD

MCU+5V (TO N9)

N21 AZ1086

5V5_3V3 (TO N14,N10)

LVDS_5V

IC+1V8 (TO N10)

LCD TFT

VLCD (TO LCD TFT)

L1 L2

CZ1

100V - 240V

IC2 IC3

FEED B.

N26 AO4801

5V5_OUT

-5VCCA

LN2

REG(2.5V)

IC03

12V

TO DVD

N35 NJM4580

N1 MSP3420G

N14

5VCCA

V5A1

VCC_1V8

TVP5147

TO TVF1

TV TUNER

U2 TPS60400

N3 BA50BC0

L50

N6 AZ1086

N5 BA50BC0

+ 52 hidden pages