Text preview for : TXM2796HFX-XAA_pt8.pdf part of Samsung TXM2796HFX/XAA 9 file, total of 68 pages for Samsung color television receiver model #'s TXM2796HFX/XAA, TXM2798HFX/XAA, TXM3097WHFXXAA, TXM3296HF6/XAA, TXM3298HFX/XAA, TXM2797HFX/XAA, TXM3096WHFXXAA, TXM3098WHFXXAA & TXM3297HFX/XAA with K55A chassis.



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Troubleshooting

8. Block Diagram
8-1 Voltage / Current Block Diagram

6 .24 V/ 62 5mA(AC)

CP T He ate r 3 3V T une r

S

1 36 V/ 84 5mA

F B

2 14 V/ 41 mA
5 mA 3 7mA

IC5 01 ,2 ,3 7812 (IC402) HDT LA78 45 LM393

1 6.3 5 V/6 97 mA
1 03 mA

T
1 4.9 V/ 12 3mA 1 6.2 V/ 45 5mA

M
7 .7V/2 17 mA 7 .9V/8 35 mA 7 8R0 5 (IC8 02 )

- 1 3.5 V/43 4 mA
4 04 mA 1 9mA

CP T Socke t
5 V/ 1 7 2mA

5 V/2 1 0mA

Main T une r Sound Contr ol IC

7 .8V/6 21 mA

P

7 8R0 5 (IC80 5 )

5 V/ 1 8 3mA

Module Boar d
5 V/ 4 3 1mA

7 8RM33 (IC20 2)

3 .3V/ 4 23 mA

Module Boar d

2 6.7 V/ 17 mA

T DA72 69

No Sound
9 V/ 3 0 mA 9 V/ 2 1 2mA 9 V/ 8 6 mA

1 2.3 6 V/3 46 mA

1 1.2 V/ 21 2mA 7 8R0 9

Main T une r Sound Contr ol IC Module Boar d Mic om (IC9 01 )

S
1 2.2 V/ 13 5mA C2073

6 V/ 1 3 0mA

12.2V/ 10mA

DDR1001A (HIC401)

78RM33 (IC903)

Samsung Electronics

8-1

MEMO

8-2

Samsung Electronics

Block Diagrams

8-3 PCB Layout

Samsung Electronics

8-3

Block Diagrams

8-4 System Block Diagram

MAIN SPEAKER

MAIN Tmblock Tuner/ LAN/IF PIP Tmblock Tuner/LAN/IF

Sound Process MSP34**

MAIN S-AMP TDA7269 Woofer AMP TDA7269

MICOM SDA555*

EEPROM 24W16

RCA Jack Array
CVBS YPbPr YC

Feature Box
SDA9407905) / CXA2151 / CXA2165 BA7657F / UPD64083 / TEA6425 (SRC, D/A, A/D, Def, PIP, Matrix)
RGB DRIVE TDA6111Q*3 V/M CRT

78R09 78R05 AC INPUT POWER SPS 250W 5Q1565F TRANS 78R33 12V 8V 24V 135V

H-Out TR FJL6920 Vertical AMP LA7845 E/W AMP LM393

33V

200V

Double Focus

FBT

8-4

Samsung Electronics

Block Diagrams

8-5 Power Block Diagram

Samsung Electronics

8-5

Block Diagrams

8-6 Video Signal Block Diagram

Feature Box BA7657F S/W CX2165 RGB Matrix Deflection

CRT-DRIVE
Ik

PIP

VS9407 Decoder*2 H/V Scaler DRAM / SRAM

29", 34" TDA6111Q 32" TDA6120Q

R.G.B

CXA2151 Sync Counter Comp. & SW

CATHODE

REF.

UPD64083 3D Comb Main

TEA6425 S/W

DVD

DTV

H-OUT V-OUT

VM

AMP VM-COIL

AFT Main TM Block Micom Jack Array - Rear Jack - Side Jack - Super Jack Sub TM Block ANT

8-6

Samsung Electronics

Block Diagrams

8-7 Sound signal Block Diagram

TM-BLOCK

AUDIO PROCESSOR MSP34XX
47 ANA-IN L-O 25 7 L-I

AUDIO AMP TDA7269
L-O 4

SIF

16

R-O

24

11

R-I

R-O

2

AV-RO AV-LO AV-L3 AV-R3

AV-L2 AV-R2

AV-L1 AV-R1

39

27

28

37

38

39

40

41

42

Mute Timming Control

24V

SIDE-A/V
R L L R L R

49 MUTE

AUDIO OUT

AUDIO IN3

AUDIO IN2 AUDIO IN2
CN702 R R L L

MICOM SDA555

Samsung Electronics

8-7

Block Diagrams

8-8 Deflection Block Diagram

Deflection & Metrix CXA2165
EW-OUT 4 7 3

COMPARATOR KA393
2

1

G

FET

D

S MICOM SAW-TOOTH H-PULSE 19 H-SYNC V-SYNC 20

H-Blank 39 10 H-Drive 40 H-DRIVE DDR1001A HDT H-OUT,TR ABL FBT FUJ29*** COL 16.5V FOCUS DIODE MOD

V-AMP
V P Drive 53 V N Drive 52 V-Blank 35 4 5 INPUT INPUT PUMP UP 7 1 2 16.5VAC DOUBLE FOCUS MODULE OUT

1 V1 DY V2 H2 H1

8

12

LA7845
V-OUT 2 EW CORECTION

1 3

8-8

Samsung Electronics