TCL T-21E20 Schematic

PCB CRT BD

P501

3 2 1

R505

33 1W

P502

4 3 2 1

REAR AV OUT

SVO

A.OUTSL

A.OUTSR

REAR INPUT

CVBS4/Y4

P901

A.IN4L

A.IN4R

REAR YUV INPUT

P902

S-VHS

P960 SIDE RUDIO INPUT

M66 (FS TUNER) PAL SECAM BG/DK/I AV-NTSC NICAM/TEXT

R516

+5V

C202 3n3

Test1

C236

2.2uF C237

2.2uF

470 1/4W

Q512 BC422

R517

Q513

BC423

R518 470 1/4W

+200V

R526

470 1/4W

15K 2W

Q522 BC422

R527

Q523

BC423

R528

470 1/4W

+200V

R536 470 1/4W

15K 2W

Q532 BC422

R537

Q533 BC423

R538 470 1/4W

AGC

R205

C203

2.2uF C204

2.2nF

R204

AVL

A.IN5L

A.IN5R

A.OUTSL

A.OUTSR

DECSDEM

AUDEEM

GND2

PLLIF

C234

1uF

SIFAGC

IFVEDIO OUT

DVB/FM OUT

VCC8V

AGC2SIF

VP2

SVO

A.IN4L

A.IN4R

CVBS4/Y4

A.IN2L

A.IN2R

CVBS2/Y2

A.IN3L

A.IN3R

CVBS3/Y3

C2/C3

C239

A.OUTL

0.047uF

A.OUTR

0.047uF

C238

A.OUTHL

A.OUTHR

CVBSO

P501

GND

CRT

GNDSCREENFOCUS

150k 1/2W

R900 47K

R901

47K

R918

P961

D906

6V2

C503

4u7 250V

R904

330

R902 100K

R905 330 R903 100K

R921 82

C922

10pF

C923

10pF

R906

D900

P200

6V2

R908A

+200V

Q900 BC847A

R908

R907

4.7K

R909

100 R911

4.7K

100

R920

1.5k 1/2W

R927

100

C926

100pF

R928

100

R926 100

C927 100pF

R924

R540

C902 100pF

C903

100pF

C920 100P

R960 47K

C505

1000P 2KV

8 8

C908

2.2uF

C928 100pF

R962

R961 47K

ETH

R506

R910

75 D901 6V2

D903 6V2

R922

D904 6V2

R923

D905 6V2

D902

6V2

R963

Q901 BC857A

C904 10uF

C905 10uF

R519

1k 1/2W

R529

1k 1/2W

R539

1k 1/2W

C533

10u 250V

D533

IN4001

R541

1M1W

1234567

S501

1234567

R200 68K

C911

1uF

C909

2.2uF

R929

100

47K 1/10W

C200 10uF

C229

+5V(8V)

L204 10uH

+5V

L205

0.1uF/50V

JP2

JP1

JP30JP4

C201 220nF

100nF

C230

4.7nF

10uH

C235 100nF

C231

R216

3.3K R217

3.3K

R201

R203 1K

R202

R214 390

C234A 2.2u/50v

R215 1K

C233

22nF

JP5

JP6

WOOFER

AOUTL

AOUTR

12345

P203

560

R525

560

R535

560

D531

1N4148

680

EHT

AGCOUT

FBISO66SVM

10K

R221

R222 100

SANDCAST

H OUT

R515 15K 2W

D511

1N4148

R523

D521

1N4148

C241

10uF

Q511 BF422

Q521 BF422

270

R533 270

C205 22nF

SIF230SIF1

R223 1K

R513 270

R524 10

GNDIF

+200V

BF422

R534 10

C531 270P/50V

R225

4.7K

Q531

GNDIF

+5V comb69GND comb68HOUT

C242

0.1uF

L206 10uH

2.2K R224

R514 10

C511

270P/50V

C521 270P/50V

39K

R521

R522

10K

R532 10K

R206

IREF

BIN70GIN

R511

R512 10K

C206

R531 47

VSC

150nF

VIFIN225VIFIN1

GND

RIN

P503

R501 1K 1/4W

1nF C207

GND

TU100

5 4 3 2 1

VDRA

100

R207

VDRA

UV1336

AGC1VT2Hi/n.c.3Mi/BS1(SCL)4Lo/BS2(SDA)5V+6i.c.(V+)7i.c.8i.c.(+33V)9IFGND10IF

C100 10uF

R100

R103

68K

39K

+5V

R101 10K

AGC

E-W

VDRB

100

R208

C208

C209

10uF

1nF

C210

22nF

C211

220nF

E-W

VDRB

DECBG

SECPLL

SCART

V1in

R943

VOUT

UOUT75YOUT74YSYNC

R9**

R945

100

GND

GND GND

UOC77

VOUT

INSSW3

C246

220n

C248

100nF

YCb

R942

C247A

0.1uF

C101

100P

100nF

C214

6n8

GND1

ABL

CIRCUIT CONSTANTS AND CIRCUIT ITSELF ARE SUBJECT TO CHANGE WITHOUT NOTICE

C004

R213A 1

Q202

BC327

+3.3VSTB

R033

+3.3VSTB

2K2

R031

10K

R030

10K

D010

R032

5.6K

MUTE

RELAY

IR IN LED KEY

KEY

X-RAY

C027 100P

TV STB

IR IN

+5VSTB

P003

100 R010

1 2 3

10nF

CON4/254 22 1/6W R009

C003 56P

22 1/6W

R011

C005 56P

SCL SDA

RELAY

4 3

R829

5V-ST

10K

STANDBY

+5VSTB

R827 10K

Q804

1815

2SD882

C008 10n

Q806 c1815

R836A

10K

Q805

+3.3V-STB

C010 100uF

C009 10n

D832 5V6

C011

10n

C012

470u 16V

Q001 2SD667A

R825 10 2W

R826 680 1/6W

C013

470uF 16V

1/6W 680

R012 D002

5.6V

107v

D003

3.9V

470u 25v

100u 160V

Q002 2SC1815Y

R013 10

C842

L802 100uH

C827

R015

C848 10n

VDRA

R350

VDRB

X-RAY

SYS

ABL

SANDCASE

R286

+14V

330

X-ray

Q281

c1815

SDA

SCL

H-OUT

LED

+12V

R603

10K

+8V

MUTE

Q280 A1015

R282 0

D280

R283 220

24V

R602 47K

Q600 A1015

C605

100uF/25V

D600

4148

D604 4148

2K2

C300

100u/16V

GND

X-RAY Protect Circuit

D281 1N4148

R285

R284

470

100K

R601

+12V

0.22/2W

GND

Q602

C1815

R605 10K

B G

D001B

LED

R007

VOL-

R025A

390

TV/AV

R024A

K008K007

R023A

300

5VSTB

220

C002 10nF

K006

R027A 680

VOL+

P-

K004

K005

R026A 470

P+ K003

Iom

L101

C102

10uH

10n

D100 IN4148

R104

100

SCL SDA

C217

C212

10uF

C215

2.2uF

R210

12K

10nF

C216

VP1

PH2LF16PH1LF

P909

C103

100uF/10V

R109

C101A

100

100P

L200

+5V

10uH

Z200

10uF

C219

C218

24.576MHz

100nF

D.GND

VG/LED

DECDIG

XTALOUT

L1in

C106

10nF

+33V

D102

C105

+5V

BYV79C33

47uF/50V

+3.3V-STB

100uF/10V

L201

1uH

C222

C223

100nF

XTALIN

vrefP_Sdac

VrefP_Sdac

VrefN_Sdac

R1in

123456789101112131415161718192021

R946

R948

R949

15K

R947

GND

416K

UOC104

GND

B/PbIN380G/YIN379R/PrIN3

C251

C249

100nF

0.1uF

C250

10uF

2SA1015 Q204

33K R227

C253 22uF/16V

L207 10uH

Q232

4.7K

R229

Q231

1K R230

C270

2200P

D204

5.6V

R228

220

BC857A

33K

LOUT

ROUT

VREFAD

VREFAD_NEG89VREFAD_POS

+3.3V analog88BO87GO86RO85BLKIN84BCLIN83LPF82GND3

C256

C255 220nF

220nF

BC857A

L208

C258

10uH

L209

10uH

100nF

BC857A

R231

Q233

R232

R270

R271

12345

18K

+5V

P202

R008 47

47u/16V

C107 10nF

1uH

L202

VrefP_Sdac

TDA12066H TDA12061H TDA12011H TDA12010H TDA12027H

GNDA

C258A

47uF/16V

C001

R115 150

R111 470

L102 1uH

R114

C224 100nF

1.8VC4

3.3VA3

ROTATION P2.2

VDDA2

VDDA1

L210

C260 220nF

10uH

3.3V-STB

IR001

CP1

123

+8v

C108

0.01uF

R116 680

R117 150

+5VSTB

C225

10uF

C226 100nF

GND1GND

GAME L P1.5

GAME R P1.4

GND

MUTE P2.4

GND

KEYB P3.3

X-RAY P3.2

DECV1V8

SCART1 P3.1

SCART2 P3.0

TUNING P2.0

SDA P1.7

SCL P1.6

SDA2 P1.3

SCL2 P0.0 IBO D/A P0.1 IBO STB P0.2

LED P0.3

VSSC2

VDDC2

TV STB P1.1

IRQ P1.0

IR P0.5

VDD96VSS

C261

220nF

D201

C254 100P

P1.2

1.8V P2.5

1.8V

P2.3

P2.1

3.3V

P0.4

1N4148

Q101

C3779

R118

R211A 4K7

Vdd

n.c.

PTC

IC001 24C16

SCL

Vss

SDA

Nicam

Z101

K9453K2966M

+5VSTB

Q201

R213B

BC327

4K7

Q287 BC847A

Z100

C110

10nF

C109 10nF

R213

1/2W

R212

4K7

R211

Q200

4K7

BC847A

C227

L203 10uH

10uF

IC200

128

127 126

L001

+5VSTB

10uH

125 124

C017100nF

123 122

121 120 119 118 117 116

115 114 113 112 111 110

109 108 107

C018

0.01uF

R029

C022 220nF

27K

R017

R218

10K

C019 10uF

BC847A

R024

L003 10uH

BZX79C2V4

47K

R018

Q203

D006 4148

100

D005

C024

4148

47uF

D004

R039

10K

+5VSTB

+3.3V STB

L002 10uH

C023

+5VSTB

3.3K R027

220nF

100 R025

3.3K

100 R026

C026 100P

106 105 104

R036 100

L211

TDA12067H

C262 47uF

D202

C257 100P

103

102

C028

1N4148

220nF

10uH L004

R047

3.3K 1/10W

100

R034

D203

1N4148

C259 100P

101 100 99 98 97

1uH

+5VSTB

R046 3K3

R014

1K 1/6W

C845

1000u 25v

A.GND

C826

10n

C350 1500P

D304

3V9

C431

50V/47uF

C623

1000uF/16V

C600 5600/63v

C606 5600/63v

R607 47K

C607 22uF/16V

C840

220P 500v

R824

R314

+14V

D413

IN4001

R851

33 1W

R850

10K

Q850 C1815

C851

100u 16V

12V

C844

10n

C828

4u7 16V

D830

R836

FR104

HF70HF70

0.22 1W

D824 RU3C

HF70HF70

C830

15K 2W

330P 2kv

C351

2200P

C308

220uF/25V

D300 4148

D306

3V9

R300

C307

1K2

47u/16v

D305 4148

Vertical Protect Circuit

R407 11/2W

Heater

C604

0.1u 50V

IC600 TDA7266

GND

D850

1N4148

K850

Standby Power<3W

R819a

1 2 3 4

C313

R834

A.GND

50V/4.7uF

D309

IN4001

P601 SPEAKER(R)

50PIN

D404

5V6

+107V

100u 160v

Q401 2235

T402

R404

15K/2W

C411

1000P / 500V

D831

FR104

220P 500v

220P 2KV

R316 1K

D307 4148

D308

4148

BF60BF60

C843

120 2W

C839

J401 0

P402

200V

P600 SPEAKER(L)

R835

8.2M 1W

C835A

2n2 AC400V

IC300

STV9302

C325

C323

0.33

R313

100uF/35V

C360

C324

100uF

100uF/25V

C422

R408 10K/1W

5600P/63V

+33V

R403 2A

C414

T401

3300PF/500V

C401

R413

220

R402

4.7 1W

D405

1N4004

D833A 1N4004

12V

M66 CRT

Conversion table

44-14OFLN-IR3A

44-21OFLN-SS1A

21’TF SAMSUNG

（）

L801

BF60X2 0.6uH

R811

15K 1/4W

R810 7K5

VR801

5KB

-14V

25v 470u

+14v

C415

470u 25v

10U 250v

C405 47u 25v

+14V

R420

2.2 2W

D806

FR104

-14V

C408

560P/2KV

C811

C810 22P

VREFVPOUTGNDPOMP UP VCCINPUT

GND

C413

C819

R803

C812

1n 50V PP

R812 56K

4.7M 1/2W

C334 2n2

SK3115

Q801

82K

L803

10n 63V

5 1 3

6 10 12

C850

R841

12K 1/6W

0.1u 50V

R813

C816

47UF/25V

D403

FR104

C403

390P 500V

Heater

D402

FR104

C412 390P 500V

D401 FR104

C409 390P 500V

BSC25-0252R

BSC25-0252S

BSC25-0252T

Prepared by

Reviewd by

Issued on

R808B

1K 1/2W

107V

Q402 2SC5885

T402

91487

IC801

D320 4148

R351 10K

-14V

R409

1 1W FUS

R405 1 1W

R418 1 1W FUS

C406B

0.012uF 1.6KV

R808A

R808

47 1/4W

100 1/4W

D807

1N4148

C808A

560PF

10n 63V

D810 IN4148

TDA16848

C815

0.001U 63V

R804

1.8K

C337

10u 100v C420

D400

1n4002

R410

10K 1w

T402

BSC25-0252S

EC04028(M66)

Jiao jianpeng Zhou songming

2005.01.26

C802A

102 400V

R801

3.3 /5W

C817

R805

4M7 1/2W C814

R806

220n 63V

56K 1/6W

R807 1M 1/2W

C806

C808

150uF/400v

10n/500v

R324 220

2K2

R315

L412

50uH

1000P

R321

1.8

L411 0uH

GND

R411

C421 390n 250v

EHT

C406B

0.011uF/1.6KV

0.012uF/1.6KV

F801 T2A

C801 220n/AC275V

RT801 PTC 20M

RL255 X4

1K2 1W

FOCUS

SCREEN

Serial No.Chassis Name

File No.

Version

Updated on

S801

C802B

102 400V

T801

36-LIF010-A X0

C803

100n/400V

C804

C805

4n7/250V

4n7/250v

D801-D804

P400

1 2 3 4

+14V

R414

7.5K

R415 1K

C410

0.033u 100V

C421

0.33uF/250V

0.39uF/250V

0.33uF/250V

P802

1 2

P801

1 2

1.5OHM 2W

2.2OHM 2W

1 OHM2W

01-000M66-MA1

0.1

2005.04.05

R420

Alignment Procedure

1. GENERAL

1.1 Common Information

1.1.1 Use isolating transformer with low internal resistance.

1.1.2 Mains voltage is 90-260

1.1.3 All voltages and waveforms mentioned are with respect to Ground. Do not use heat-sink as Ground.

1.2 How to enter factory Mode (Service menu, service mode)

1.2.1 Certain alignment procedures need to enter Factory Mode (Service Menu). There

are two ways to access factory mode:

One is : A. Press and hold the VOLUME DOWN key tightly on the unit until minimum level B. Don’t release the VOLUME DOWN key on the unit C. Then press the CAPS key in 3 times on the RC The other is: Press “D-mode

shortcut key if “bit-0” of “mode 1” is at “0”.)

1.2.2 All system data in Factory Mode of “Key 8 & Key 9”

otherwise, the set will work abnormally.

1.2.3 It is suggested to disable the D-Mode key before the set leave the factory.

Navigation:

- Press “Pro+” “Pro -”

- Press “Vol+ ” “Vol-”

- Press “0” “1” “2” “3” “4” “5” “6” “7” “8” “9” to access factory menu.; All change in factory data will be saved in EEPROM automatically

- Press “BUS OPEN” other ICs. This is only valid during automatic adjustment of white balance.

“ Key on the factory RC. (Please noted the “D-mode” key is the invalid

V AC, unless otherwise stated.

are not adjustable when servicing,

key to select option;

key to adjust or select option.

on the RC as the shortcut key

key on factory RC to cut off the I2C control from the CPU to

1.3 A few special modes:

1.3.1 Aging Mode is used before set alignment. It would operate in factory mode;

1.3.2 Vertical Stop mode factory mode and repress “ mute” key to exit.

1.3.3 White balance alignment mode

1.3.4 Factory Mode (Initialization)

In factory mode, press RECALL button to initialize the FACTORY-OUT status.

is used to confirm the accelerating voltage. Press “Mute” key in

Volume: 30, PG password:0000, Favorite channel: ch1/ch2/ch3, channel lock: disable, Picture mode: normal, Color temp: normal, calendar:01-08-2004

2. Alignment procedure:

2.1 B+ voltage adjustment

2.1.1 Apply 110-240V AC (+5V) to mains power input, and Philips standard testing pattern to RF input.

2.1.2 Adjust VR801 in STANDARD mode until voltage at TP2(B+) is 107V+

0.5V.

Alignment Procedure

2.2 RF AGC adjustment

2.2.1 Input 58dB grey scale signal.

2.2.2 Press key “4” to enter RF AGC adjustment.

2.2.3 Press “OK” key to auto adjust RF AGC, also can adjust “RF AGC” key until the

letter change from “INACTIVE” to ”ACTIVE”.

* The others use default value.

2.3 Crystal oscillator frequency adjustment

2.3.1 Crystal oscillator frequency adjustment with NICAM

a. Input audio signal with NICAM. b. Enter factory mode, press “game” key , then press “V+” key to adjust “DCXO

Auto”, until it displays “OKEY”.

2.3.2 Crystal oscillator frequency adjustment without NICAM

a. Input PAL color bar signal.

b. On factory mode, press “0” to adjust “DCXO Auto” until it steady at 128.

2.4 Screen & Focus voltage adjustment

2.4.1 Screen voltage adjustment

a. Input any signal. b. Press “MUTE” key on the remote control and the screen will become a

horizontal line, here horizon stop vibration. Then adjust the “screen” VR on the flyback until the horizontal line can just be seen (minimum visible intensity).

2.4.2 Focus voltage adjustment

a. Input cross hatch pattern signal. b. Adjust the “focus” VR on the flyback until the screen becomes clear.

2.5 White balance adjustment (NORMAL)

2.5.1 Choose Black and White pattern signal (PAL).

2.5.2 On factory mode, press “1” key enter white balance adjustment.

2.5.3 Measure the dark side of the picture with a color analyzer adjust RED and GRN until the data on the analyzer become x=274+

2.5.4 Measure the bright side of the picture. Then adjust WPR, WPG and WPB until

the data on the analyzer become x=274+

2.5.5 Repeat step 1 and 2 until you get right color on both dark and bright side of the

screen.

Remark ：

1. When adjusting, RED、GRN are used to adjust black balance and WPR、 WPB、WPG are used to adjust white balance .

2. On product line, the item which can be auto adjusted by auto test equipment , its data according to auto adjust value.

3. White balance address please meet the fourth part in page 12.

8, y=280+8.

2.6 Adjustment of Sub-brightness

2.6.1 Input grey scale + color bar signal.

2.6.2 Press key “6” enter sub-brightness adjustment.

2.6.3 At standard state, adjust “BRTC” parameter , until the secondary grey just be seen.

* Do not change value “BRTS”.

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