Sanyo LCD-20CA1Z Manual de usuario

SERVICE MANUAL LCD Television

Specifications

Power Source . . . . Monitor: DC12V

AC Adapter: AC100

240V, 50Hz/60Hz (Output DC 12V)

Screen Size . . . . . . . . . .20 Inch (Measured Diagonally)

Picture Resolution . . . . .640 x 480=307,200 Pixels

Brightness . . . . . . . . . . .500 cd/m2

Colour System . . . . . . . .PAL, SECAM, NTSC4.43, NTSC, PAL-60Hz

Television System . . . . .B/G, DK, K’, I, M/M

Channel Coverage . . . .VHF: E2-E12, R1-R12, K1-K9, A2-A13, J1-J12

0-11, 5A (Australia), 1-11 (New Zealand)

UHF: 21-69, A14-A69, J13-J62

28-69 (Australia)

CATV: S1-S41, X, Y, Z, Z+1, Z+2

Aerial Input Impedance 75Ω

Speaker . . . . . . . . . . 5 cm ✕9 cm ✕ 2 pcs.

Sound Output (RMS). ...2W+2W

Input Terminals

AV1 (Video): Composite video Input

S-Video (Y/C Separate) DIN Jack Input

AV1 (Audio): L/R Stereo Input

AV2 or DVD (Video): Composite/Component Y, CB, CRInput

AV2 or DVD (Audio): L/R Stereo Input

Output Terminals

Video Monitor Output x 1

Audio Monitor Output: L/R x 1

Headphone Jack: Mini Stereo Jack x 1

Dimensions . . . . . . . . . . 480 (W) ✕468 (H) ✕226 (D)mm (Included Stand)

Weight . . . . . . . . . . . . . . approx. 8.0 Kg (Included Stand)

Specifications subject to change without notice

N2KVZ

FILE NO.

Model No. LCD-20CA1Z

(Australia/Middle East/Asia)

Give complete “SERVICE REF. NO.” for parts

order or servicing. It is shown on the rating label

at the cabinet back of the unit.

This T.V. receiver will not work properly in

foreign countries where the television

transmission system and power source dif-

fer from the design specifications. Refer to

the specification table.

Product Code:111372616

REFERENCE NO. SM5110675

Original Version

Chassis Series: UB3-C

Service Ref. No. LCD-20CA1Z-00

Contents

-2-

Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Chassis Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

IC Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

CPU Port Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Service Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8

On-screen Service Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Mechanical Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11

Cabinet Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Chassis Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-21

Safety Notice

Safety Precautions

The following precautions must be observed.

1: Comply with all caution and safety-related notes provided on the cabinet back, cabinet bottom, inside the

cabinet or on the chassis.

2: When replacing a chassis in the cabinet, always be certain that all the protective devices are installed

properly, such as, control knobs, adjustment covers or shields, barriers, etc..

DO NOT OPERATE THIS TELEVISION WITHOUT THE PROTECTIVE SHIELD IN POSITION AND PROPERLY

SECURED.

3: Before replacing the cabinet cover, thoroughly inspect the inside of the cabinet to see that no stray parts or

tools have been left inside.

Before returning any television to the customer, the service personnel must be sure that it is completely safe to

operate without danger of electrical shock.

Product Safety Notice

Product safety should be considered when a component replacement is made in any area of a receiver.

Components indicated by mark in the parts list and the schematic diagram designate components in which

safety can be of special significance. It is particularly recommended that only parts designated on the parts list

in this manual be used for component replacement designated by mark . No deviations from resistance

wattage or voltage ratings may be made for replacement items designated by mark .

-3-

Chassis Block Diagrams (Video Signal Lines)

TU201

TUNER

ASSY, PWB MAIN

IC301

SWITCHING IC

COMP. VIDEO/Y

AV2 INPUT

COMPONENT VIDEO IN

COMPOSITE VIDEO IN

AV1 INPUT

COMPOSITE VIDEO IN

S-VIDEO IN

VIDEO MONITOR

OUT

COMP. VIDEO or

S-VIDEO

IC303

VIDEO SW 7

S-VIDEO

COMP.

VIDEO

TV COMP. VIDEO

IIC BUS

4/5

VIDEO MONITOR OUT

Cb, Cr

IC601

DIGITAL DECODER

WITH Y/C SEPARATON

92/94

Cb, Cr IN

20 C

Y IN

C IN

IIC BUS

13/14

IC701

I/P CONVERTER

SCREEN CONTROLLER

IC702

SDRAM

LCD PANEL

(20V)

LCD PANEL

(15V)

(For 20V)

(For 15V)

IC801

TTL/LVDS

CONVERTER

R/G/B (0-7)

IC201

CPU

IC204

DC/DC

CONVERTER

154 153

OSD_HD OSD_VD

26 27

OSD_CC

22 23 24 25 21

R G B Y I

152 151 150 144 149

R G B Y I

OSD OUT

OSD IN

IIC BUS

Y/C DIGITAL

(0-7)

IIC BUS

ASSY, PWB,

KEY BOARD

KEY INPUT

ASSY, PWB,

LED BOARD

RC INPUT

-4-

Chassis Block Diagrams (Audio Signal Lines)

TU201

TUNER

ASSY, PWB MAIN

IC301

SWITCHING IC

AUDIO R (AV2)

AV2 INPUT

AV2 AUDIO IN

AV1 INPUT

AUDIO MONITOR

OUT

AUDIO

IIC BUS

4/5

AUDIO MONITOR OUT

(RIGHT)

IC302

AUDIO AMP.

IIC BUS

13/14

IC201

CPU

IIC BUS

ASSY, PWB,

KEY BOARD

KEY INPUT

ASSY, PWB,

LED BOARD

RC INPUT

AUDIO MONITOR OUT

(LEFT)

AUDIO L (AV2)

AUDIO L (AV1)

AUDIO R (AV1)

AV1 AUDIO IN

AUDIO R

AUDIO L

SP902

SP901

HEADPHONE

JACK

L-OUT

R-OUT

MUTE

IC Block Diagrams

-5-

IC601 < Digital Decoder with 3D YC.> TC90A92AFG

27 M

10bit ADC

CVBS/Y

Sync Sep.

Clamp

MPX

reference

clock

3D comb

3line

comb

Motion

Det.

ID1

S/N detection

CCD slice

42M

X'tal

Vertical enhance

delay adjust

contrast adust

ACC

color decord

TINT adjust

Color adjust

ITU-R656

encode

IIC-BUS

SCL SDA

656/601

Format

HD/VD

Timing

LTI

Clock

Gene.

D/A

X 8

27M

4fsc

27M

8bit ADC

Digital I/F

DRAM

IC701 < I/P Converter Screen Controller > TC6398AF

IN 2

Video

I/ F

RGB

YCbCr

Color A djust.

H/ V Scaling

IP- Conv.

H/ V Filt er

Outline-

sharpening

YCbCr

RGB

YCbCr

RGB

SDRAM(32 or 64Mbit)

Blending

Positioning

-correct .

-Com

TFT- LCD

Dat a 2 4bit

S D R A M C

LC D

I/ F

I2C- I/ F

VIN2

RGB through mode

Data 16bit

CLK

FI EL D

IN 1

Video

I/ F

Data 24bit

CLK

FI EL D

VIN1

OSD

I/ F

Dat a 8bit

CLK

VIN3

(OSD)

RGB

YCbCr

RGB

CKE

CLK

DQM-4bit

WEN

CASN

RASN

CSN

DQ-32bit

BS-2bit

A-11bit

CLKI

CLKO

ENAB

VO UT_DISP

TC6398AF/ XB

SDA

SCL

Clock Gen.

( P LL )

SYSCLK

AGS

RESETN

-6-

CPU Port Functions

Pin No. Function Name Function IN/OUT

1VSS GND

2BL-BRI FOR PANEL BACK LIGHT BRIGHTNESS OUT

3PWM1 SOUND MUTE OUT

4DISPLAY ON DISPLAY ON OUT

5POWER DOWN POWER DOWN OUT

6STAND-BY POWER ON/OFF OUT

7PANEL ON PANEL ON OUT

SCALER RESET SCALER RESET (RESET=LOW)

OUT

9VDATR RESET VDATR RESET OUT

10 BL-ON PANEL ON OUT

11 SCL1 IIC BUS PRT FOR EEPROM (SCL: CLOCK) I/O

12 SDA1 IIC BUS PRT FOR EEPROM (SDA: DATA) I/O

13 P53 PANEL OPTION (HIGH=15”, LOW=20”) IN

14 P54 BASS OUT

15 AFT AFT INPUT IN

16 SENSOR-IN P-FAIL2 (FAILURE=Less than 4V) IN

17 KEY KEY INPUT IN

18 MODE1 MODE1 OUT

19 MODE2 MODE2 OUT

20 SAW SW SAW SWITCH OUTPUT OUT

21 OSD-I OSD-I OUTPUT OUT

22 OSD-R OSD RED OUTPUT OUT

23 OSD-G OSD GREEN OUTPUT OUT

24 OSD-B OSD BLUE OUTPUT OUT

25 OSD-Y OSD BLANKING OUTPUT OUT

26 P70(HD) H-SYNC. IN IN

27 P71(VD) V-SYNC. IN IN

28 OSC1 CLOCK INPUT FOR OSD IN

29 OSC2 CLOCK OUTPUT FOR OSD OUT

30 TEST TEST PORT IN

31 XIN CLOCK INPUT FOR MAIN IN

32 XOUT CLOCK OUTPUT FOR MAIN OUT

33 RESET RESET PORT (RESET=LOW) IN

34 P-FAIL1 POWER FAILURE (FAILURE=LOW) IN

35 RMT RC INPUT IN

36 BVIREADY BVIREADY IN

37 SCL0 IIC BUS PORT FOR IC I/O

38 SDA0 IIC BUS PORT FOR IC I/O

39 GND GND --

40 FORMAT2 STATUS IN

41 FORMAT2 ACK IN

42 VDD VDD 5V --

Service Adjustments

-7-

General

This set has an On-screen Service Menu system includ-

ed in the CPU thar allows remote operation for most of

the service adjustments.

On-screen Service Menu System

1. Enter the Service Menu

While pressing the MENU button on the televi-

sion, press the Number Key 1on the remote control

unit. The Service Menu now appear.

2. Service Adjustments:

Press the POSITION UP or POSITION DOWN

button on the remote control handset to select the

desired service menu item you want to adjust.

When the POSITION UP is kept pressed, ten steps of

adjustment items will step up at a time.

When the POSITION DOWN is kept pressed, ten

steps of adjustment items will step down at a time.

Use the VOLUME + or

or number button to adjust

the data. The + or

button will increase or decrease

the data sequentially.

3. Exit from the Service Menu

Press the MENU button twice to turn off the Service

Menu display.

The data which is set in the service mode is stored

into the memory IC automatically.

SERVICE

001 PLUG PLAY 00

[ Service Mode Display ]

Title

Item No. Adjustment

Data

[ Entering the Service Menu ]

VOLUME +

VOLUME

POSITION UP

POSITION DOWN

[ Service Adjustment ]

[ Exit from the Service Menu ]

-8-

Important Notice:

Do not attempt to adjust service adjustments not listed

on above otherwise it may cause loss of performance

and for correct operation.

Service Adjustments

White Balance Adjustment

1. Receive a White Pattern.

2. Set the television to following conditions:

Brightness: Normal

Colour: Normal

Contrast: Maximum

3. Enter the Service Menu.

Adjustment Item:

142 WBGREEN

151 WBRED

160 WBBLUE

4. Decide the fixed item which is maximum value

(Example, Item 151 WBRED), select item of other 2

colours (Example, Item 142 WBGREEN or

Item 160 WBBLUE) with the POSITION UP or DOWN

button, and adjust a proper white balance with the

VOLUME + or

button.

After adjustment, confirm white balance again by

normal picture.

Note: Adjusted data is less than the fixed data.

5. Press the MENU button to turn off the Service Menu

display.

The data which is set in the service mode is stored

into the memory IC automatically.

On-screen Service Menu

Item TITLE INITIAL

No. DATA

001 PLUG PLAY 00

002 TUNER SEL 00

003 IF1HSIZEL 00

004 IF1HSIZEH 80

005 IF1VSIZEL 00

006 IF1VSIZEH C0

007 IF1HSTAL 00

008 IF1HSTAH 26

009 IF1VSTAL 01

010 IF1VSTAH 08

011 NT HCUTSTAL 00

012 NT HCUTSTAH 07

013 NT VCUTSTAL 00

014 NT VCUTSTAH 05

015 NT HCUTSIZL 00

016 NT HCUTSIZH A7

017 NT VCUTSIZL 00

018 NT VCUTSIZH 79

019 IF2HSTAL 00

020 IF2HSTAH 00

021 IF2VSTAL 00

022 IF2VSTAH 00

023 IF2HCUTSTAL 00

024 IF2HCUTSTAH 0A

025 IF2VCUTSTAL 00

026 IF2VCUTSTAH 06

027 IF2HCUTSIZL 00

028 IF2HCUTSIZH A1

029 IF2VCUTSIZL 00

030 IF2VCUTSIZH 83

031 OSDHSIZEL 00

032 OSDHSIZEH B6

033 OSDVSIZEL 00

034 OSDVSIZEH 70

035 OSDPISEL 00

036 OSDHOFSTL 00

037 OSDHOFSTH 10

038 OSDVOFSTL 00

039 OSDVOFSTH 09

040 IP2MODEN 02

041 IP2MODE 02

042 FILTERSEL 00

043 FILH2YTAP1 00

044 FILH2YTAP2 00

045 FILH2YTAP3 87

046 FILH2YTAP4 87

047 FILH2YTAP5 5C

048 FILH2CTAP1 00

049 FILH2CTAP2 00

050 FILH2CTAP3 87

051 FILH2CTAP4 87

052 FILH2CTAP5 5C

053 FILV2YTAP1 85

054 FILV2YTAP2 10

055 FILV2YTAP3 2A

056 FILV2CTAP1 85

057 FILV2CTAP2 10

058 FILV2CTAP3 2A

059 FILH2ON 03

060 FILV2ON 03

061 EDG2ON 13

062 EDG2PLM 20

063 EDG2MLM 20

064 EDG2TAP 5A

065 LOHSIZEL 00

066 LOHSIZEH 64

067 LOVSIZEL 00

068 LOVSIZEH 78

069 EDG2LIM 06

070 EDG2BAI 10

071 LO1HSTAH 00

072 LO1VSTAL 00

073 LO1VSTAH 00

074 LO2ON 01

075 LO2HSTAL 00

076 LO2HSTAH 00

077 LO2VSTAL 00

078 LO2VSTAH 00

079 LRFLG1 00

080 LRFLG2 00

081 COLADJ1CONT 1B

082 COLADJ1BRIG 40

083 COLADJ1UFU C0

084 COLADJ1VFU 80

085 COLADJ1UFV 80

086 COLADJ1VFV C0

087 COLADJ2CONT 1B

088 COLADJ2BRIG 40

089 COLADJ2UFU C0

090 COLADJ2VFU 80

091 COLADJ2UFV 80

092 COLADJ2VFV C0

093 NT HSIZEL 00

094 NT HSIZEH 50

095 NT VSIZEL 00

096 NT VSIZEH 78

Item TITLE INITIAL

No. DATA

097 LO2HSIZEL 00

098 LO2HSIZEH 50

099 LO2VSIZEL 00

100 LO2VSIZEH 78

101 EXPMODE1 00

102 EXPMODE2 00

103 EXP1INA 28

104 EXP1INB 28

105 EXP1INC 28

106 EXP1IND 28

107 EXP1INE 28

108 EXP1OUTA 28

109 EXP1OUTB 28

110 EXP1OUTC 28

111 EXP1OUTD 28

112 EXP1OUTE 28

113 EXP2INA 18

114 EXP2INB 1B

115 EXP2INC 1E

116 EXP2IND 21

117 EXP2INE 38

118 EXP2OUTA 24

119 EXP2OUTB 24

120 EXP2OUTC 24

121 EXP2OUTD 24

122 EXP2OUTE 38

123 GAMWS 01

124 IF2CUTEN 01

125 VIDEOS1COL 23

126 VIDEOS1BRI 20

127 VIDEOS1CONT 3F

128 VIDEOS1SHP 16

129 VIDEOS2COL 1E

130 VIDEOS2BRI 24

131 VIDEOS2CONT 36

132 VIDEOS2SHP 08

133 VIDEOS3COL 12

134 VIDEOS3BRI 22

135 VIDEOS3CONT 1B

136 VIDEOS3SHP 03

137 NOR G 00

138 WARM G E8

139 COOL G F8

140 WBGREEN DIF 00

141 WBGREEN S 00

114422WWBBGGRREEEENNFF77

143 BBGREEN 02

144 BBGREEN DIF 00

145 BBGREEN S 00

146 NOR R 00

147 WARM R 00

148 COOL R F0

149 WBRED DIF 00

150 WBRED S 00

115511WWBBRREEDDFF77

152 BBRED 00

153 BBRED DIF 00

154 BBRED S 00

155 NOR B 00

156 WARM B EA

157 COOL B 00

158 WBBLUE DIF 00

159 WBBLUE S 00

116600WWBBBBLLUUEEFF44

161 BBBLUE 02

162 BBBLUE DIF 00

163 BBBLUE S 00

164 GAMMA 0A

165 WSVSTA 0F

166 WSVSIZE E1

167 PERR 00

168 SOUND OPT 00

169 INDONESIA 00

170 YUV COLOR 02

171 YUV TINT 00

Mechanical Disassembly

-9-

Stand Removal

1. Remove a screw and remove a stand cover.

2. Position TV face down on a padded or cushioned

surface to protect the screen and finish.

3. Remove 4 screws to take the stand off.

CAUTION: Hold the stand firmly as you remove the

last screw.

Cabinet Back Removal

1. Remove 4 screws and remove the Cabinet Back.

Note: The cabinet back may still be a little tight due to the

snaps at the other locations.

75 mm

226.2 mm

480 mm

188.3 mm

424 mm

467.9 mm

Screen Center

[ Details of Dimensions ]

Snap

Mechanical Disassembly

-10-

Chassis Removal

Remove the cabinet back and shield cover and can be seen the chassis.

To remove the Shield Cover of Main PWB, remove 11 screws.

To remove the Shield Cover of Inverter PWB, remove 6 screws.

Screw

Shield Cover of

Main PWB

Shield Cover of

Inverter PWB

Screw

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