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Colour Television Service Manual
Model CE27LC3-B
Service Ref. No. CE27LC3-B-00
PRODUCT CODE: 111373418 ORIGINAL VERSION: Chassis No. UB4-B

CE27LC3-B

Please use Schematic Diagram SKP20444 with this Service Manual. Give complete "SERVICE REF. NO." for parts order or servicing, it is shown on the rating sheet on the cabinet back of the TV set. Note This TV receiver will not work properly in foreign countries where the television transmission system and power source differ from the design specifications. Refer to the specifications for the design specifications

Contents Safety precautions/Specifications ..................................................................................................................2 Block diagrams ..............................................................................................................................................3 Cabinet Disassembly ......................................................................................................................................4 Adjustment and Repair Procedures............................................................................................................5~9 CPU Port Functions ......................................................................................................................................10 IC Block Diagrams ..................................................................................................................................11~13 Pin description of semiconductors ................................................................................................................14 Part Description and reading of schematic diagram ....................................................................................15 Cabinet Parts List ........................................................................................................................................16 Electric Parts List ....................................................................................................................................17~26

Part No.

SKSM0721

N2PY

JULY 2004

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SAFETY PRECAUTION
1: An isolation transformer should be connected in the power line between the receiver and the AC line when a service is performed on the primary of the converter transformer of the set. 2: Comply with all caution and safety-related notes provided on the cabinet back, inside the cabinet, on the chassis or the LCD display . 3: 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, isolation resistor-capacitor networks etc. Before returning any television to the customer, the service technician 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 signifigance. 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 ! .

SPECIFICATIONS
Power source Television system Colour system Receiving channel AC 220~240V, 50Hz System I PAL/NTSC4.43 (PAL/NTSC4.43/NTSC3.58 IN AV MODE) UHF: 21~69 VHF: A-J, E2-E12 CATV: X, Y, Z, S1-S41 75ohm CENELEC standard Composite video, RGB and Audio L/R TV-output with composite video and audio L/R CENELEC standard Composite video, RGB, S-VHS and Audio L/R Monitor output with composite video and Audio L/R RCA jacks Composite video and Audio L/R Mini Jack 12 x 2W 702 x 508 x 205mm 19.3 Kg

Aerial input impedance Rear AV terminal AV1: INPUT: OUTPUT: AV2: INPUT: OUTPUT: Front AV terminal AV3: INPUT: Headphone socket Sound output(Music) Dimensions (WxHxD) Weight

-2N2PY

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LCD-TV BLOCK DIAGRAM
AV3-L/R IN AV3/DIG AUD

TC4066
AV2-L/R IN AUDIO DEC. AUDIO AMP SP X 2 AV1-L/R IN

MON-A-OUT

BLOCK DIAGRAM

TU STV8216 LA4919
HP

TDA9886

IF

SUB CPU BA7609F
MON-V-OUT M16C/26

Y/CR/CB:8 VIDEO DEC.

VIDEO DEC. SCALER
RGB : 8bit

THC63 LVDM83R

-3STV2310 STV3550
R/CR,G,B/CB- IN

SD RAM
128 MB 128 MB

SD RAM

FLA SH
16 MB TV

Y/U/V SW

BA7603F VIDEO SW LA7956 AV_1 SCART 1 AV_2 SCART 2 AV_3
V-IN A-L/R-IN AUDIO MONITOR RGB(Y/C) V-I/O A-I/O

This is a diagram for all models and therefore differs slightly from the actual block diagram.

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AV1-TV-OUT

27" PANEL LVDS

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AV1-V- IN

AV2-V- IN

R/G/B

AV3-V- IN

RGB V-I/O A-I/O RC-IN AV-LINK

AV1-RGB

RGB SW

AV2-RGB

TC4053

N2PY

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CABINET DISASSEMBLY
CABINET BACK DISASSEMBLY
1. Remove 22 screws for 27" 2. Pull out the cabinet back.
REMOVE CABINET BACK RETAINING SCREWS

Remove Bracket locating screws (x 4 if fitted)

Remove

Bracket locating screws
L/S

(x 4 if fitted)

R/D

-4N2PY

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OPTION SETTING
[After replacing the Memory IC (IC803)]
The memory IC, IC803, stores the option data of TV set and service adjustments data for each circuit, therefore, when the memory IC is replaced, it should be performed following setting and "SERVICE ADJUSTMENT" on next page.

To enter to the Option Mode
+ Press and hold the F/OK button on the remote control and Pw button on the front panel of the TV. The option window will appear on the screen.

ON-TIMER OFF PLUG AND PLAY ON WELCOME TEXT ON BBE OFF AUTO VOLUME OFF HEADPHONE OFF CRT 16:9 MODE OFF NOISE REDUCTION ON COUNTRY UK/IRE RASTER ROTATION OFF SESA OFF DIGITAL RC OFF LIGHT MONITORING OFF VIDEO MUTE OFF
OPTION MODE FOR CE27LC3-B-00

To set the option mode
+ Highlight the desired option item by using the Pv or Pw button . + To switch the option mode, use the Volume - (LEFT) or Volume + (RIGHT) button. + The data which is set in the option mode is stored into the memory IC automatically. Following table shows the available option items and default setting mode.

Option Mode
ON-TIMER PLUG AND PLAY WELCOME TEXT BBE AUTO VOLUME HEADPHONE CRT 16:9 MODE COUNTRY

Mode
ON or OFF ON or OFF ON or OFF ON or OFF OFF or ON ON or OFF ON or OFF UK, IRE BG/DK / I / LL'

Description & Note
On-timer available, default "OFF" Plug and Play mode, default "ON" Display message when first set up, default "ON" BBE sound mode, default "OFF" Default "OFF" Headphone control , default "OFF" Default "ON" Default "ON" TV system, default "UK/IRE" Default "OFF" Default "OFF" Digital option, default "ON" Ambient light control of LCD brightness, default "ON" Default "OFF"

NOISE REDUCTION ON or OFF

RASTER ROTATION ON or OFF SESA DIGITAL RC VIDEO MUTE ON or OFF ON or OFF ON or OFF

LIGHT MONITORING ON or OFF

Exit from the Service Mode
+ Press the MENU button.

-5N2PY

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SERVICE ADJUSTMENTS
Note: Some items of the service adjustments for this chassis are controlled by the CPU, IC801, and the adjustments are carried out by using the RC handset.

INITIALISATION OF MEMORY IC
To initialise the memory IC (IC803), press and hold the NORMAL button on the remote control, then press the Pw button on the front panel of the TV set and then turn the Mains switch Off and On. The initialisation is now completed. When initialised the memory IC and all of the setting data (option data and service adjustment data) stored in the IC are reset to the default value. It is necessary to set the option settings and readjust the service adjustments listed on page 6 and to re-tune all the channels.

The available adjustment items are as follows; TDA9885 : This can be adjusted for AGC. Video : This can be adjusted for the service adjustment. DO NOT ADJUST OTHER SETTINGS

[After replacing the Memory IC (IC803)]
The memory IC, IC803, stores the service adjustments data for each circuit, therefore, when the memory IC is replaced, it should be programmed by using "OPTION SETTING" on previous page and the following adjustments.

TO ENTER SERVICE ADJUSTMENTS
While pressing the green button on the remote control press the Pw on the cabinet front. The service menu appears.

Service SV Vers 042 Video Sound STV2310 TDA9885 STV8206 Median Filter ON Other Colour Temperature WSS LCD Parameters Fan control
Use the 6or 5 to highlight the service menu you require and press the F/OK button to enter.

TO EXIT SERVICE ADJUSTMENTS
Press the Menu button to navigate ackwards through the service menus until menus disappear.

IMPORTANT NOTICE Do not attempt to adjust service adjustments not listed on the above otherwise it may cause loss of performance and product safety. -6N2PY

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Service menu: Video Enter the service adjustment menu as described on the previous page and select "Video" using the Pw or Pv buttons and then press the F/OK button to enter.

VIDEO G2 Alignment Config. White Point R 41 White Point G 32 White Point B 36 Peak White Limiter 0 Black Level offset R 8 Black Level offset G 8 Gain pre-scale RGB 0 Fast blanking delay 0 Luma/Chroma delay 0 Restore default

Use the Pw or Pv buttons to select the option, then press the F/OK button on the remote control to enter.

Service menu: Sound Enter the service adjustment menu as described on the previous page and select "Sound" using the Pw or Pv buttons and then press the F/OK button to enter.

Audio Menu Audio Type Volume Balance Loudness Spatial effect

3 0 6 13 0

Use the Pw or Pv buttons to select the option, then press the F/OK button on the remote control to enter.

Service menu: TDA9885 Enter the service adjustment menu as described on the previous page and select "TDA9885" using the Pw or Pv buttons and then press the F/OK button to enter

TDA9885 Write 1

70

Use the Pw or Pv buttons to select the option, then press the F/OK button on the remote control to enter.

-7N2PY

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ADJUSTMENTS IMPORTANT NOTICE
Do not attempt to adjust the following service adjustments except when adjustments are required in servicing otherwise it may cause loss of performance and product safety. AGC ADJUSTMENT 1. Select the clearest VHF station 2. Connect a digital voltmeter to test point TP-A and GND 3. Enter service menu : TDA9885 4. With the Pw or Pv buttons select "Write 1" 5. Adjust using the or buttons until the readout from the voltmeter is 3.2 Vdc.

GREY SCALE ADJUSTMENT SCREEN ADJUSTMENT 1. Make sure the set is warm (20 mins) 2. Receive Black and White picture/pattern 3. Enter service menu "Video" 4. Select item "White Point R" or "White Point B" 5. Using the or buttons adjust to make the white, white.

HORIZONTAL ADJUSTMENT HORIZONTAL CENTRING ADJUSTMENT 1. Set wide screen mode to "FULL". 2. Preferably receive a circular pattern 3. Enter service menu "LCD Parameters" 4. Use the Pw or Pv buttons to highlight "H Display start". 5. Press the or buttons to adjust horizontal centre.

VERTICAL ADJUSTMENT VERTICAL CENTRING ADJUSTMENT 1. Set wide screen mode to "FULL". 2. Preferably receive a circular pattern 3. Enter service menu "LCD Parameters" 4. Use the Pw or Pv buttons to highlight "V Display start" 5. Press the or buttons to adjust the vertical centre.

-8N2PY

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CPU PORT FUNCTIONS

IC801
208 207 206 205 204 203 202 201 200 199 198 197 196 195 194 193 192 191 190 189 188 187 186 185 184 183 182 181 180 179 178 177 176 175 174 173 172 171 170 169 168 167 166 165 164 163 162 161 160 159 158 157

P_VID EO5 VDD33 _IO P_VIDEO4 P_VIDEO3

CLK_DFL H100 V100 SHIELD_ADCDAC

VSS_IO VDD18_CORE DE

GND_ADC

VCC33_ADC VDD33_IO

VDD33_IO PORT_D3 PORT_D2

P_VIDEO2 P_VIDEO1 P_VIDEO0

PORT_C7 PORT_D5 VSS_IO VDD33_IO

VDD33_IO

VDD33_IO PORT_A4

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

P_VIDEO6 P_VIDEO7 P_VIDEO8 P_VIDEO9 VSS_IO

PORT_D7 PORT_A1 PORT_D4 PORT_A0 PORT _C0

VSS_IO

PORT_A2 PORT_D6

PORT_D1 PORT_D0 PORT_C4

PORT_C5 PORT_C6

PORT_B0 PORT_B1 PORT_B2

PORT_B3

PORT_B4

PORT_B5

VSS_IO PORT_A3

PORT_A7 PORT_A6

PORT_A5

DCLK

PORT_C1 PORT_C2 PORT_C3 VSS_IO VDD18_CORE VDD33_IO YCRCB7 YCRCB6 YCRCB5 YCRCB4 YCRCB3 YCRCB2 YCRCB1 YCRCB0 CLK_DATA HSYNC VSYNC SHIELD_PLL VDD18_PLL VSS_PLL CLKXTP CLKXTM GND_PLL1 VCC18_PLL1 XTALIN XTALOUT GND_PLL3 VDD18_PLL3 GND_IO VCC18_IO VDD18_CORE VSS_IO VDD33_IO NRESET TRST TDI TDO TCK TMS VDD18_CORE VSS_IO VDD33_IO FLASH_D0 FLASH_D8 FLASH_D1 FLASH_D9 FLASH_D2 FLASH_D10 FLASH_D3

156 155 154 153 152 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105

P_VIDEO10 P_VIDEO11 P_VIDEO12 P_VIDEO13 P_VIDEO14 VDD33_IO P_VIDEO15 P_VIDEO16 P_VIDEO17 P_VIDEO18 P_VIDEO19 VSS_IO P_VIDEO20 P_VIDEO21 P_VIDEO22 P_VIDEO23 P_VIDEO24 VDD18_CORE VSS VDD33_IO P_VIDEO25 P_VIDEO26 P_VIDEO27 P_VIDEO28 P_VIDEO29 VSS_IO VDD33_IO VSS VDD18_CORE SDRAM_D7 SDRAM_D6 SDRAM_D5 SDRAM_D4 SDRAM_D3 SDRAM_D2 SDRAM_D1 SDRAM_D0 VSS_IO VDD33_IO SDRAM_D15 SDRAM_D14 SDRAM_D13 ADDR_15 NOT_CS_SDRAM NOT_RAS NOT_CAS RD_NOTWR NOT_BE0 VDD18_CORE SDRAM_D12 SDRAM_D11 SDRAM_D10 SDRAM_D9 NOT_BE1 ADDR_13 VDD33 _IO NC VSS_IO SDRAM_D8

IC801 STV3550M



VDD33_IO VSS_IO NOT_CS_FLASH

ADDR_12 ADDR_11 ADDR_9 ADDR_8 ADDR_7 ADDR_6 ADDR_5 ADDR_4 CKOUT_SDRAM

VDD18_CORE VSS FLASH_D15

CKIN_SDRAM ADDR_3

FLASH_D14

FLASH_D6 FLASH_D13 FLASH_D5

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

-9N2PY

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NC FLASH_D12 NC FLASH _D4
102 103 104

FLASH_D7

ADDR_2 ADDR_1 ADDR_0 ADDR_10 ADDR_16 VDD33_IO

VDD33_IO

VDD33_IO

FLASH_D11 VDD33_IO VSS_IO

ADDR_17

ADDR_18

ADDR_19

ADDR_14

VSS_IO

VSS

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IC BLOCK DIAGRAMS IC801
STV3550
2D Block Move OSD
YCRCB[7:0] CLK_DATA HSYNC VSYNC

Standard Definition Input (SDIN)
H/V Filter Temporal Noise Reduction Film Mode Detection

Video Display Pipeline
PSI/CTI

Picture Compositor
Cursor Plane Background Plane

Digital Video Output
Gamma Correction Perfect Color Engine

4- to 10-bit RGB Video Outputs

27 MHz CLKXTP CLKXTM Reset

Clock Generator

ST20 32-bit CPU Core
100 MHz, 8 kB SRAM 4 kB I-Cache 4 kB D-Cache Diagnostic Controller Interrupt Controller

RTC, ADC, I Bus, C I/O Ports, 4 Timers, UART, WDT, PWM and Infrared Digital Preprocessor

Timebase Generator

TV Peripherals

External Memory Interface
Flash SDRAM

DCLK DE H100 V100 Output Clock

STV3550
NRESET Build-Up Counter
Video Pipeline YSI CTI OSD Pipeline Picture Compositor Comp. Cursor BG Plane

R Digital Video Output
Gamma Correction Perfect Color Engine

G B

CSA

YCRCB[7:0] CLK_DATA HSYNC VSYNC

8

HV Filter TNR

SDRAM Fast Blanking EMI4 2D Block Move 16/32 Flash Time Base Generator 30 I/Os H100 V100

SDIN Block

ST20 Core

27 MHz Crystal

Clock Generator

TV Peripherals TV Chassis Control

CLKXTM

CLKXTP

CLK_DFL

-10N2PY

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IC BLOCK DIAGRAMS

IC3451 STV8216T

S

Demodulation

udio roein oudeaer udio roein oudeaer Multi-Standard Diital Stereo Demodulator Diital udio Matri Suooer eadone udio roein eadone

Sound

Mono n

nut S

oer Sul Manaement

IC001

LA4919NE