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