Sanyo LCD-27XL2 Service Manual

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ASSY, PWB, SIGNAL
X121
VIF1

IC101 (TDA9886) IF-PLL DEMODULATOR

ASSY, PWB, SCAL

KLP1 (27") KLP2 (32")

A101 TUNER 1 2 17
TV AV1 VIDEO IN
(SCALER/LVDS)

IF 27":90~99 32":77~86

LCD PANEL (WXGA)
IC4001 (ADE3800)
ANALOG LCD DISPLAY ENGINE 33/34/38/39/43/44 SW3951~ SW3955 K19J K8J POWER KEY IN 146 KEY IN 145

SAW FILTER
VIF2

ASSY,PWB, CONTROL
A3901 RC RECEIVER D3901 LED

AV1 TERMINAL (K1001) 12
IC1224 VIDEO SW AV2 VIDEO IN

COMPISITE VIDEO IN

16

AV2 SCART (K1002) 7
AV3 VIDEO IN 153/154/155 AV4 VIDEO IN SELECTED VIDEO OUT ANALOG PB/B, PR/R, Y/G OUTPUT

COMPISITE VIDEO/Y IN

20

5 IC801 (STV3600)

1

RC-IN 132

19 S-VIDEO-C IN 4 3

VIDEO MONITOR OUT

3

MAIN CPU/CAPTION DECODER 117~124 SCL
5 1 20 6

SDA
R IN (AV2) 1 3 R/CR 16 G IN 14 KD 15 26 CVBS IN C IN Y IN Analog Input Stage 51 52 23 24 G IN 53 B/CB IN I C Interface
2

R/S-VIDEO C IN

15

Chassis Block Diagrams (Video Signal Lines)

-4IC802 MEMORY IC1801 SUB CPU
5 K8D 63 3 2 B IN (AV2) 8 6 B/CB CB IN (AV5) 9 27 14 29 IC1251 RGB SW 12 Input SRC 19 22 18 17 R/CR IN System Clock generation

G IN

11

CR IN (AV5)

IC804 SDRAM

IC803 SDRAM

7

B IN

G/Y IN (AV2)

IC2001 (STV2310) DIGITAL VIDEO DECODER

IC805 FLASH MEMORY

AV3 TERMINAL (K1003)

COMPISITE VIDEO IN

Luma Chroma Separator

Standard Identifier & Chroma Demodulator
PAL/NTSC/SECAM

AV4 TERMINAL (K1004)

COMPISITE VIDEO IN

Soft Mixer RGB Insertion

AV5 TERMINAL (K1006)

Format Converter & Output Scaler
Video Corection

COMPONENT CR IN

COMPONENT CB IN

Synchronization & Monitoring Unit Output FIFO VBI Slicer
Line-locked Output Pixel Clock Pin-19~28

COMPONENT Y IN

DIGITAL Y, CB, CR OUTPUT

X122
SIF1 23 24 8 TV AUDIO OUT SIF2

IC101 (TDA9886) IF-PLL DEMODULATOR

ASSY, PWB, SIGNAL

A101 TUNER SAW FILTER

IF

AV1 TERMINAL (K1001)
9 10 6 19 AUDIO R-OUT 9 29 24 14 15 AUDIO PROCESSOR/ STEREO SOUND DEMODULATOR/ 3D SURROUND HEADPHONE L-OUT AUDIO MONITOR OUT-L 18 29 19 23 L-IN R-IN 24 AUDIO MONITOR OUT-R 31 HEADPHONE R-OUT 2 27 R-OUT 28 1 AUDIO R-OUT 28 AUDIO L-OUT 1 AUDIO L-OUT 13 78

IC3501 (NJM2155) BBE/BASS EXPANDER

IC001 (LA4919N) AUDIO AMP.
KSPL 15/16 L-OUT SP901

AUDIO L-IN

AUDIO R-IN

AV2 SCART (K1002)

6

AUDIO L-IN

KSPR

SP902 24/25 R-OUT

2

AUDIO R-IN

IC3451 (STV8216)

3

AUDIO MONITOR OUT-L

1

AUDIO MONITOR OUT-R

Chassis Block Diagrams (Audio Signal Lines)

-5IC1222 AUDIO SW AV3 L-IN 1 AV4 L-IN 3 L-OUT AV5 L-IN 4 TV -L 11 TV -R AV3 R-IN 13 R-OUT AV4 R-IN 14 AV5 R-IN 15 12 2 KP3 K36P3 TV OUT-L TV OUT-R 5

AUDIO MONITOR OUT (K1005)

HEADPHONE JACK L-OUT K001

AV3 TERMINAL (K1003)

AUDIO L-IN

KIF

AUDIO R-IN

AV4 TERMINAL (K1004)

IC3601 (CXA2104S)
2 1 11

K36IF

AUDIO L-IN

TV AUDIO-IN

AUDIO R-IN

MTS / SAP

AV5 TERMINAL (K1007)

ASSY, PWB, MTS

AUDIO L-IN

AUDIO R-IN

IC Block Diagrams
IC001 < AUDIO AMP. > LA4919N-E
Headphone Block

IC3501 < BBE/Bass Sound Processer > NJM2155M
28 HP OUT1

HP IN1 HP IN2 HP D.C HP Standby AMP Standby D.C DDL ON TIME IN2 PRE GND PRE VCC IN-VREF IN1 POWER GND

1
Ripple filter

VG=6dB

24

Voltage Regulator
VG=6dB

Vcc

IN-L HIL-L HOUT-L LOWIN-L LOWOUT-L

1

IN-R HIN-R HOUT-R LOWIN-R LOWOUT-R OUT-R VREF GIN GOUT LPIN LPOUT GND

2 3 4 5 6 7 8 9 10 11 12 13
Input amplifier

27 HP OUT2
Output A amplifier Nonlinear amplifier
B

23

2

H/P Standby SW

26 POWER GND 25 OUT2-

22

3 4

BBE

BBE

21

AMP. Standby SW Ripple filter

24 OUT2+

20

5

Output amplifier Switching regulator Block H. L. S
Switching Drive

23 SW GND
OUT-L

19

6

22 SWB

18

7

Muting circuit used at power on

A B C D *H. L. S Higher Level Signal Selector

FILTER

21 SWE

17

BBE

8

20 SW OUT
Intput amplifier
Output amplifier stage REF amplifier Output C amplifier

Control

16

Mach3

9

Headphone stage Input amplifier stage Switching regulator stage

19 VCC 18 17 16 OUT1+

PROCESS LO CONTOUR MACH3 Vcc

Bias

15

10

Power TR stage

14

11 12

13

Nonlinear amplifier

D

14
Output amplifier

15 OUT1-

IC101 < IF-PLL Demodulator > TDA9886TSV4P
cVAGC (pos) TOP TAGC VAGC VIF-PLL filter VPLL
External reference signal or 4MHz crystal

REF

AFC

9

14
cAGC(neg)

16
cBL

19

15

21

TUNER AGC

VIF-AGC

RC VCO

DIGITAL VCO CONTROL

AFC DETEVTOR

VIF2 VIF1

2 1

VIF-PLL

SOUND TRAPS 4.5 to 6.5MHz

17

CVBS

Video output: 2Vp-p (1.1vp-p without trap)

SIF2 SIF1

24 23
SUPPLY

SINGLE REFERENCE QSS MIXER INTERCARRIER MIXER AND AM DEMODULATOR MAD OUTPUT PORTS I2C-BUS TRANSCEIVER

AUDIO PROCESSING AND SWITCHES

8 5 6

AUD
Audio output

DEEM
de-emphasis network

cAF cAF

SIF AGC

NARROW-BAND FM-PLL DEMODULATOR

cAGC

20
Vp

18
AGND

13
N.C.

3

22

11
SCL

10
SDA

7

12

4

OP1 OP2

DGND SIOMAD

FM-PLL

FM-PLL filter
Sound intercarrier output and MAD select

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