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Hitachi 22LD3750DC, Service Manual

The Hitachi 22LD3750DC is a top-notch product with a user-friendly design and exceptional performance. Enhance your experience with this high-quality device by easily accessing the Instructions For Use Manual. Download it from 88.208.23.73:8080 for free to unlock the full potential of your Hitachi 22LD3750DC.

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A0

A1

A2

GND

SDA

SCL

WP

VCC

S

CA

R

T

R

B

1

ID

TV
IF

DV

D

S

ENSE

DVDCONNECT

OR

SCART CVBS OUT

SOFTWARE UPDATE

PC DDC EEPROM

AUDIO LINE-OUT & SPDIF

PC CONNECTOR

IDTV & TDM CONNECTOR

SCALER A YAKIN OLMALI

BACK AV/SIDE VE YPBPR

PC VE FAV AUDIO IN

1

2

R1

0

3

7

5

R

RX-DATA

TDM_GND0

1

2

S10

2

1

2

S112

DVB_IN_B/C

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

CN122

1

2

R415

75R

SC_R

SIDE_Y1

1

2

R139

100R

SIDE_PB1

SIDE_PR1

1

2

F133

600R

1

2

R211

100R

PCIL

LINE_OUT_L

1

2

F107

600R

1

2

R1

3

7

1

0

k

1

2

R132

10k

+5V

+5V

TDM_Y

TDM_PR

1

2

C103

220n

10V

1

2

C104

220n

10V

TDM_PB

1

2

C105

220n

10V

DVB_IN_G/Y

DVB_IN_R

SILENCE

+3V3

+3V3

AGC_DVB

1

2

S111

VCTI_PROG_EN

1

TP127

SDA_DVB

SCL_DVB

CVBS_IN

1

2

S162

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

S

C

1

0

1

1

2

CN120

DVD_SENSE

DVD_IR_ON/OFF

IRQ

1

TP124

TV_TXD

TV_RXD

DVB_R_IN

DVB_L_IN

VGA_VS

VGA_HS

VGA_R

VGA_G

VGA_B

1

2

R1

14

2

k2

1

2

R1

13

2

k2

1

2

R297

1k2

1

2

R296

1k2

1

2

R202

100R

1

2

R201

100R

1

TP122

1

TP121

LINE_OUT_L

1

2

R136

680R

LINE_OUT_R

1

2

S164

EE_WP

VGA_VS

1

2

D140

C12V

1

TP

10

2

1

2

S163

1

TP

10

3

1

TP

10

4

1

2

S113

SPDIF_OUT

DVD_L_IN

DVD_R_IN

1

2

R506

10k

1

2

R490

10k

DVD_L_IN

1

TP132

1

2

D1

0

1

C1

2

V

1

2

3

D1

2

9

B

A

V

7

0

1

2

C173

100n

16V

1

2

C108
12p
50V

1

2

F135

600R

1

2

C423
4n7
50V

1

2

R3

0

7

1

0

k

1

2

3

Q115

BC848B

1

2

R3

0

4

1

0

k

1

2

3

Q113

BC848B

+3V3

1

2

R209

100R

SC_B

1

2

R107

75R

1

2

R207

100R

1

2

R110

75R

1

2

R208

100R

SC_G

1

2

R111

75R

1

2

C123
27p
50V

1

2

D133

C5V1

1

2

C122
27p
50V

1

2

D135

C5V1

RX-DATA

SC_PIN8

1

2

D104
C12V

1

2

C172
100n
16V

SC_IN_L

1

2

C413
4n7
50V

1

2

F125

600R

1

2

D134

C5V1

TX-CLOCK

1

2

R492

75R

SC_V_OUT

1

2

R1

0

8

7

5

R

1

2

C347
150p
50V

SC_V_IN

1

2

R206

100R

1

2

F126

600R

1

2

C414
4n7
50V

1

2

R133

680R

1

2

C345
150p
50V

SC_L_OUT

1

TP131

DVD_CVBS

DVD_C

1

TP130

1

2

C129
27p
50V

DVD_Y

1

2

C128
27p
50V

1

TP129

1

2

C130
27p
50V

1

2

R215

100R

1

2

R214

100R

+5V

1

2

3

D1

2

4

B

A

V

9

9

1

2

C466
100p
50V

1

2

R310

10k

1

2

R172

4k7

1

2

R173

4k7

1

2

C124
27p
50V

1

2

R412

75R

1

2

3

CN104

1

2

C422

50V

4n7

1

2

3

Q111
BC848B

1

2

R418

75R

1

2

R212

100R

1

2

3

4

5

6

7

8

9

10

11

12

CN121

1

2

R164

3k9

SC_IN_R

1

2

D1

0

2

C1

2

V

1

2

D103

C12V

1

2

C348
150p
50V

1

2

D131

C5V1

1

2

R210

100R

1

2

R109

75R

1

2

D130

C5V1

1

2

C121
27p
50V

1

2

C346
150p
50V

1

2

R134

680R

1

2

C412
4n7
50V

1

2

F128

600R

1

2

R309

10k

1

2

R3

0

5

1

0

k

1

2

3

Q116

BC848B

1

2

3

Q114

BC848B

1

2

R411

75R

1

2

R130

910R

1

2

R2

8

6

8

2

0

R

1

2

R2

7

3

4

7

0

R

1

2

R3

8

0

2

7

k

1

2

R3

0

3

1

0

k

1

2

C458
47p
50V

1

2

C174
100n
16V

1

2

3

Q158

BC858B

1

2

3

Q112
BC848B

1

2

3

D1

2

5

B

A

V

9

9

1

2

C106
12p
50V

1

2

R203

100R

1

2

R1

0

4

7

5

R

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

CN111

1

2

3

D1

2

3

B

A

V

9

9

1

2

R260

220R

1

2

R1

4

9

3

k3

1

2

3

4

5

6

7

8

U691

ST24LC21

1

2

C420
4n7
50V

1

2

C349
150p
50V

1

2

C350
150p
50V

1

2

R135

680R

1

2

C416
4n7
50V

1

2

F129

600R

1

2

F130

600R

1

2

3

JK101

1

2

3

JK109

1

2

3

JK105

1

2

3

JK102

DVD_R_IN

1

TP133

1

TP126

1

TP125

1

TP123

1

TP120

1

TP119

1

TP118

1

TP117

1

2

S114

1

2

R261

220R

1

2

R1

5

1

3

k3

1

2

R1

5

0

3

k3

1

2

C421
4n7
50V

1

2

F136

600R

1

2

3

JK106

1

2

3

JK103

1

2

C417
4n7
50V

1

2

3

JK104

1

2

R416

75R

1

2

R213

100R

IR

1

TP

10

1

1

2

F127

600R

1

2

R205

100R

1

2

R204

100R

VCTI_PROG_EN

1

2

C107
12p
50V

1

2

C127
27p
50V

1

2

C126
27p
50V

1

2

C125
27p
50V

1

2

C415
4n7
50V

1

2

D132

C5V1

SC_FB

+5V

VGA_5V

TX-CLOCK

HWSCL

+5V

HWSDA

+8V

SC_V_OUT

IF_CVBS_OUT

PCIR

DVB_IF2

DVB_IF1

DVB_IN_CVBS

+3V3

PC_SDA

PC_SCL

PC_SCL

PC_SDA

VGA_5V

1

2

R1

0

5

7

5

R

1

2

R1

0

6

7

5

R

VCTI_PROG_EN

1

2

3

D1

2

6

B

A

V

9

9

1

2

3

D1

2

7

B

A

V

9

9

SC_R_OUT

1

2

R3

0

6

1

0

k

1

2

R308

10k

1

2

R413

75R

1

2

R414

75R

1

2

R417

75R

1

2

R174

4k7

1

2

R159

10k

+3V3

1

2

R216

100R

1

2

R491

75R

EE_WP

VCTI_PROG_EN

1

2

R505

10k

1

2

3

Q187
BC848B

1

2

R507

10k

1

2

R520

680R

MUTEPORT

GPIO_2

No. 0249

Input and Output

Summary of Contents for 22LD3750DC

Page 1: ...r die Sicherheitshinweise und Hinweise zur Produktsicherheit in diesem Wartungshandbuch zu lesen SERVICE MANUAL MANUEL D ENTRETIEN WARTUNGSHANDBUCH Data contained within this Service manual is subject to alteration for improvement Les données fournies dans le présent manuel d entretien peuvent faire l objet de modifications en vue de perfectionner le produit Die in diesem Wartungshandbuch enthalte...

Page 2: ... 10 6 1 Microcontoller Video Audio Processor VCT4953G 10 6 2 Scaler De interlacer MST TSUMU38BF 13 6 3 Audio Stage LM358D MP7721 16 6 4 HeadPhone Amplifier TDA1308T 16 6 5 Audio Matrix Switch TEA6422D 19 6 6 HDMI Receiver ANX9021 19 6 7 Video Switch PI5V512 20 6 8 Tuner DTT71306 21 6 9 SAW Filter X6966M 22 6 10 I2C Switch 74HCT4053 22 6 11 Audio DAC CS4334 23 6 12 IC E2PROM 24LC02 2Kbx8 24 6 13 SP...

Page 3: ... 2 GENERAL DESCRIPTION The system is a low to mid end 22 1680 x 1050 TFT TV solution basically for EU market with VCT4913G microcontroller video audio processor chip on a 2 layer PCB Since the target market is EU the first release of the TV will support PAL SECAM B G D K I L L The target panel is 22 W 1680 x 1050 TFT LCD panels A DVD loader is used to read DVD content and a DVB T module card is us...

Page 4: ...er Control SRS TRU Surround OPT SRS TRU Bass OPT BBE WOW OPT Picture Features WIDE PANEL 4 3 16 9 Auto opt Subtitle opt Zoom opt Panoramic opt Picture Modes Bright Standard Soft Media Window Enhancement MWE Backlight brightness setting movie normal bright Multi System Reception PAL SECAM BG DK I I L L NTSC Video Playback WSS 16 9 4 3 Aspect Ratio Auto Switch Channel Type Sorting Favorite Sport Mus...

Page 5: ...or etc The IC also has a teletext decoder with fastext memory The processed video output is sent to MST TSUMU38BF scaler deinterlacer in RGB format together with a composite sync The TV tuner is PLL controlled symmetrical IF output type The IF signal is filtered by a single SAW filter Inter carrier sound demodulation is performed by the system After the SAW filter block IF signal is processed by V...

Page 6: ...The DC voltages required at various parts of the chassis and inverters are provided by a main power supply unit and power interface board IPS generates 12V and 5V DC supply Power stage which is on chasis generates 12V for audio amplifier and 5V stand by voltage and 33V 12V 5V 3 3V and 1 8V supplies for other different parts of the chassis 4 MICROCONTROLLER PORT CONFIGURATION PIN NO PORT NAME SIGNA...

Page 7: ...trol for tuner 27 P22 WP O Write protection control for NVM 28 P23 IR I Infrared input Table 4 1 VCTI port configuration 5 SIDE BOARDS CONNECTORS 5 1 Keyboard A four pin connector is used between 17mb29 and the keyboard KEY signal is sent directly to microcontroller ADC port and depending on the voltage level of KEY signal microcontroller performs one of these actions menu program program volume v...

Page 8: ...wer up the LED board 5 3 DVB T module board DVB T module board TDM1300 is used to receive digital terrestrial broadcast signals Three cables are used to connect 17MB29 and TDM1300 power data and IF 12V 500mA is sent to TDM1300 by power cable Analog RGB YPbPr CVBS stereo audio tuner control SCL SDA AGC and three GPIO port outputs of TDM1300 together with UART ports TV_RXD TV_TXD IRQ are carried by ...

Page 9: ...er of 17MB29 is used for both analogue and digital reception Tuner is controlled by either the 17MB29 microcontroller VCTI or TDM1300 board microcontroller The IF intermediate frequency output of the tuner is sent to TDM1300 board for digital reception ...

Page 10: ...ee cables are used to connect 17MB29 and DVD electronic card power data and sense 12V 500mA is sent to DVD electronic card by power cable Y C and or CVBS video stereo audio outputs and infra red input of DVD module board is carried on data cable When a DVD is inserted into the loader the DVD electronic card sends an interrupt signal DVD_SENSE to the 17MB29 microcontroller ...

Page 11: ...panel LCD module PIN7 signal is a logic 1 or 0 signal depending on the panel type 5 6 IPS Power Card This product include AC DC flyback converter DC DC converter and DC AC half bridge converter There are two option whose total output power are 52W and 55W This system does not have PFC Power Factor Correction coil ...

Page 12: ...10 ...

Page 13: ...PECIFICATIONS 6 1 Microcontroller Video Audio Processor VCT4913G VCTI49xy is composed of microcontroller video proccessor display and deflection processor sound proccessor and IF blocks as shown in figure below ...

Page 14: ...and PMQFP144 PSSDIP88 package is chosen because of its convenience in the soldering process PSSDIP88 package has two versions 1 and 2 PSSDIP88 2 package is the pinning mirrorred version of PSSDIP88 1 and is preferred to be used for layout compatibility ...

Page 15: ...13 ...

Page 16: ...e MST517A M also integrates intelligent power management control capability for green mode requirements and spread spectrum support for EMI management The TSUMU38BF also incorporates a new Dynamic Frame Rate DFR generator for the digital output video to the display panel that preserves the advantages of a fixed output clock rate while eliminating the output end of frame short line MST has a built ...

Page 17: ...FUNCTION 4 PWM0 AN DIG_DIM O Analog or digital dimming control 55 PWM1 BKL_ON OFF O Backlight On Off Control PVCC_ON OFF O Panel Logic Power On Off control 196 PWM2 PC HDMI_SW O Video switching control Table 6 2 1 MST5x7A M port allocation ...

Page 18: ...It is one of MPS second generation fully integrated audio amplifiers which dramatically reduces solution size by integrating the following 250mΩ power MOSFETs Startup Shutdown pop elimination Short circuit protection Mute Standby The MP7721 utilizes a single ended output structure capable of delivering 2 x 10W into 8Ω speakers MPS Class D Audio Amplifiers exhibit the high fidelity of a Class A B a...

Page 19: ...17 ...

Page 20: ...clicks Power supply ripple rejection Low power consumption Short circuit resistance High performance high signal to noise ratio high slew rate low distortion Large output voltage swing 6 5 Audio Matrix Switch TEA6422D TEA6422D is a bus controlled audio matrix switch in an SO28 plastic monopackage The main features of TEA6422 D are 6 stereo inputs 3 stereo outputs Gain control Cascadable 2 differen...

Page 21: ...ecom a nd datacom applications Applying the same advanced techniques in ANX9021 allows displays systems to achieve errorfree HDMI reception over long inexpensive cables up to 20 meters and assure the widest ran ge of interoperability against uncertain qualities of cheap cables from lowcost suppliers as the standard ma tures The ANX9021 can receive and output up to eight digital audio channels at u...

Page 22: ...mute Integrated HDCP decryption engine and pre programmed keys Programmable power management with automatic shutdown for power conservation Supports automated link integrity checking 144 lead TQFP package supporting lead free and green requirements 6 7 Video Switch PI5V512 PI5V512 is a wide bandwidth 5 port 2 1 mux demux video switch with High Z outputs The main features of PI5V512 are High perfor...

Page 23: ...tal terrestrial tuner designed for reception in VHF I VHF III and UHF compliant with the European digital terrestrial standard ETS 300744 and CENELEC standards EN 55013 and EN 55020 It covers all channels from 44 25 MHz to 863 25 MHz The main features of DTT713xx are Integrated tuner for digital and anlog broadcasting Low phase noise high sensitivity performance Small size 50mm x 35mm x 12mm Inter...

Page 24: ...SAW Filter X6966M 6 10 I2C Switch 74HCT4053 74HCT4053 is a triple 2 channel analog mux demux with a common enable input Each multiplexer demultiplexer has two independent inputs outputs nY0 and nY1 a common input output nZ and three digital select inputs S1 to S3 ...

Page 25: ...og lowpass filter This architecture allows for infinite adjustment of sample rate between 2 kHz and 100 kHz simply by changing the master clock frequency The main features of CS4334 are Complete stereo DAC system interpolation D A output analog filtering 24 bit conversion 96dB dynamic range 88dB THD N Low clock jitter sensitivity Single 5V power supply Filtered line level outputs On chip digital d...

Page 26: ...witch controls analog and digital voltages that may vary across the full power supply range from VCC to GND The device has been designed so the ON resistance RON is much lower and more linear over input voltage than RON of typical CMOS analog switches The channel select input structure provides protection when voltages between 0V and 5 5V are applied regardless of the supply voltage This input str...

Page 27: ...25 ESD Performance HBM 2000V MM 200V Chip Complexity 38 FETs ...

Page 28: ...26 ...

Page 29: ...FUNCTION XX782 4 14 8 1 1 17 LD 69 FRONT COVER LCD22784 W H LENS LED 2832 WRF LENS IR 21005 H1 6 H2 5 SCREW P C ZN YSB 3 x 6 5 BUTTON STAND BY1709W SCREW PC ZN YFMB 3x9 5 SPEAKER 16 R 5 W 31x94 mm ROHS BUT FUN 1709W KROM MET KAPLAMA 17 TK 83S 2 1 1 4 1 2 1 1 1 1 1 DISPLAY 22W SCREW PC ZN YFMB 3x9 5 2 COVER FOOT LCD 2293 1 18 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Description No Qty ...

Page 30: ... 1 TP130 1 2 C129 27p 50V DVD_Y 1 2 C128 27p 50V 1 TP129 1 2 C130 27p 50V 1 2 R215 100R 1 2 R214 100R 5V 1 2 3 D 1 24 BAV9 9 1 2 C466 100p 50V 1 2 R310 10k 1 2 R172 4k7 1 2 R173 4k7 1 2 C124 27p 50V 1 2 R412 75R 1 2 3 CN104 1 2 C422 50V 4n7 1 2 3 Q111 BC848B 1 2 R418 75R 1 2 R212 100R 1 2 3 4 5 6 7 8 9 10 11 12 CN121 1 2 R164 3k9 SC_IN_R 1 2 D 1 02 C12V 1 2 D103 C12V 1 2 C348 150p 50V 1 2 D131 C5V...

Page 31: ...V 12 F151 600R 12 F139 600R 12 R222 100R 12 C181 100n 16V 12 C200 100n 16V 12 C452 22p 50V 12 C453 22p 50V 1 2 C179 100n 16V 12 F149 600R 1 2 C182 100n 16V 12 F150 600R 1 2 C180 100n 16V 12 F105 200R 12 F102 330R 1 2 C183 100n 16V 12 F101 330R 12 S116 12 C202 100n 16V 1 2 C426 10n 16V 12 F137 600R 1 2 C164 1n 50V 12 R393 1k 1 2 C177 100n 16V 1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19 20 21 22 23...

Page 32: ...1k HSYNC0 VSYNC0 1 2 C330 220n 10V 2 1 16V 100n C215 12 R190 4k7 PWM0 12 R328 10k 1 2 3 Q134 BC848B 1 2 3 Q133 BC848B 12 R326 10k 12 R327 10k 5V 12 R370 22k 1 2 C224 100n 16V 12 R254 5k6 12 R253 5k6 PWM2 12 R580 2k2 12 R283 470R 12 R439 2k2 1 2 3 Q130 BC848B 12 R399 1k 1 2 C229 100n 16V 1 2 C230 100n 16V 1 2 C228 100n 16V 1 2 C225 100n 16V 1 2 C223 100n 16V 1 2 C218 100n 16V 1 2 C226 100n 16V 1 2 ...

Page 33: ...R478 220R 12 R477 680R 1 2 C261 100n 16V 1 2 C262 100n 16V 1 2 C159 100u 6V3 1 2 C160 100u 6V3 1 2 3 4 U707 LM1117 12 R376 22k 12 R375 22k 1 2 C258 100n 16V 1 2 C142 470u 16V 1 2 C141 470u 16V 1 2 3 4 5 JK107 1 2 CN101 12 R256 5k6 12 C370 8n2 50V 12 R344 10k 12 R382 27k 12 R171 3k9 1 2 C443 22u 16V 1 2 C254 100n 16V 12 L106 22u 12 D122 SS33 1 2 C645 10n 16V 1 2 3 45 6 7 8 U697 MP1593 1 2 C249 100n...

Page 34: ...C169 1n 50V 12 S143 12 C438 10p 50V 12 R238 100R 1 2 3 Q149 BC848B 12 R196 4k7 12 C167 1n 50V 12 R127 150R 12 C376 1u 50V 3V3 12 R156 220k 12 R423 39k 12 F116 60R 12 C170 1n 50V 12 F141 600R 1 2 3 4 5 6 7 8 9 JK108 12 C264 100n 16V 12 R239 100R 12 R301 47k 12 R300 47k 12 D115 1N4148 12 R377 22k 12 S139 1 2 3 Q147 BC848B 1 2 3 Q146 BC848B 5V_HP SDA_5V SCL_5V 12 R284 470R SWITCH_SOUND_R HDMI_R_IN HD...

Page 35: ...7 8 R410 33R 12 R364 10k 1 2 C303 100n 16V 12 R247 100R 12 F145 600R 1 2 C310 100n 16V 1 2 C146 10u 16V 12 R148 47R 12 R287 330R 1 2 C307 100n 16V 12 R245 100R 12 R244 100R HDMI1_HP HDMI0_HP DVDD18 DVDD33 DVDD18 DVDD33 DVDD18 DVDD33 AVDD33 HDMI1_D1N HDMI1_D1P AVDD33 HDMI1_D2N HDMI1_D2P AVDD33 HDMI1_D0N HDMI1_D0P HDMI1_CLKP HDMI1_CLKN AVDD33 AVDD33 HDMI0_D2P HDMI0_D2N AVDD33 AVDD33 HDMI0_D1N HDMI0_...

Page 36: ...M_Y HDMI_PB TDM_PB 12 S204 12 S203 GAIN2 VGA_G RAIN GAIN 12 C586 47n 16V BIN0P RIN0P GIN0P 12 C605 1n 50V 1 2 C653 10p 50V 12 R538 470R 12 R525 47R 12 C583 47n 16V 12 C582 47n 16V 1 2 C652 10p 50V 1 2 C651 10p 50V SOY 12 R524 47R 12 R522 47R 12 S201 5V 1 2 C633 100n 16V 12 F179 600R 12 3 D157 BAV9 9 12 C574 4u7 10V 12 R568 75R 1 2 C650 10p 50V SIDE_PR1 12 F178 600R 5V 1 2 C632 100n 16V 12 F177 600...

Page 37: ...147 Milano Italia ITALY Tel 39 02 487861 Tel 39 02 38073415 Servizio Clienti Fax 39 02 48786381 2 Email customerservice italy hitachi eu com HITACHI Europe AB Box 77 S 164 94 Kista SWEDEN Tel 46 0 8 562 711 00 Fax 46 0 8 562 711 13 Email csgswe hitachi eu com HITACHI EUROPE S A S Lyon Office B P 45 69671 BRON CEDEX FRANCE Tel 33 04 72 14 29 70 Fax 33 04 72 14 29 99 Email france consommateur hitach...

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