Sanyo CE23LC4-C Schematic

Part No. SKSM0821 N2RL SEPTEMBER 2005

Colour Television Service Manual

Model CE23LC4-C

Service Ref. No. CE23LC4-C-00

PRODUCT CODE: 111374310

ORIGINAL VERSION:Chassis No.UK1-A

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

CE23LC4-C

Contents

Safety precautions/Specifications ..................................................................................................................2

Option settings............................................................................................................................................3~4

IC descriptions............................................................................................................................................5~6

Service Data ..............................................................................................................................................7~8

Block Diagram ................................................................................................................................................9

IC Block Diagrams........................................................................................................................................................................10~14

CPU Functions ........................................................................................................................................15~19

Cabinet Parts List ........................................................................................................................................20

Cabinet Disassembly....................................................................................................................................21

Pin description of semiconductors................................................................................................................22

Part Description and reading of schematic diagram ....................................................................................23

Electric Parts List....................................................................................................................................24~30

Please use Schematic Diagram SKP20552 inserted with this Service Manual.

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N2RL

SAFETY PRECAUTION

X-RADIATION PRECAUTION

The primary source of X-RADIATION in the television receiver is the picture tube. The picture tube is specially constructed to limit X-RADIATION emissions. For continued X-RADIATION protection, the replacement tube must be the same type as the original including suffix letter. Excessive high voltage may produce potentially hazardous X-RADIATION. To avoid such hazards, the high voltage must be maintained within specified limit. Refer to this service manual, high voltage adjustment for specific high voltage limit. If high voltage exceeds specified limits, take necessary corrective action. Carefully follow the instructions for +B1 volt power supply adjustment, and high voltage adjustment to maintain the high voltage within the specified limits.

PRODUCT SAFETY NOTICE

SPECIFICATIONS

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 .

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 picture tube.

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.

Power source AC 220~240V, 50Hz Television system System I Colour system PAL/NTSC4.43 (PAL/NTSC4.43/NTSC3.58 IN AV MODE) Receiving channel UHF: #21~69 Aerial input impedance 75ohm Rear AV terminal

AV1: CENELEC standard

INPUT: Composite video, RGB and Audio L/R

OUTPUT: TV-output with composite video and audio L/R

AV2: CENELEC standard

INPUT: Composite video, RGB, S-VHS and Audio L/R

OUTPUT: Monitor output with composite video and Audio L/R

Front AVterminal

AV3: RCA jacks

INPUT: Composite video and Audio L/R Sound output(Music) 12 x 2 Dimensions (WxHxD) 580 x 480 x 257mm Weight 8.4 Kg

Important recycling information.

Your SANYO product is designed and manufactured with high quality materials and components which can be recycled and reused.

This symbol means that electrical and electronic equipment, at their end-of-life, should be disposed of separately from your household waste.

Please dispose of this equipment at your local community waste collection / recycling centre.

In the European Union there are separate collection systems for used electrical and electronic products.

Please help us to conserve the environment we live in!

Note: This symbol mar k and recycle system are applied only to EU countries and are not applied

to other countries of the world.

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N2RL

OPTION SETTING

To enter to the Option Mode

+ Press and hold the F/OK button on the remote control and P▼ button on the front panel of the TV. The option win-

dow will appear on the screen.

To set the Option Mode

+ Highlight the desired option item by using the P▲ or P▼ 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.

The following table shows the available option items and default setting mode.

Exit from the Option Mode

+ Press the MENU button.

Option Mode Mode Description & Note

OSD H-POS Set value to 6 COUNTRY EU or UK Country default “EU” SORT MODE Sort mode, default “Sorting” PLUG & PLAY ON or OFF Plug & Play mode, default “ON” WELCOME TEXT ON or OFF Welcome Text default “ON” SURROUND ON or OFF Surround sound default “ON” BASS FEATURE Bass Feature default “BBE+Bass Exp” AVL ON or OFF AVL mode, default “OFF” AV3 ON or OFF AV3 mode, default “ON” COLOUR SYSTEM ON or OFF Colour system, default “OFF” AFC ON or OFF AFC mode, default “ON” PROGRAM NAME ON or OFF Program name default “OFF” TEXT NO SIGNAL ON or OFF Disables Text when no signal, default “ON” BLUE BACK ON or OFF Blue Black mode, default “OFF” DIGITAL MODE ON or OFF Digital mode, default “OFF” SCART Set value to 2

OPTION MODE FOR CE23LC4-C-00

Option OSD H-Pos 6  Country  EU Sort Mode SORTING Plug & Play ON Welcome Text ON Surround ON Bass Feature BBE+Bass Exp AVL OFF AV3 ON Colour System OFF AFC OFF Program Name ON Text no signal ON Blue Back OFF  Digital Mode OFF Scart 2

i

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N2RL

OPTION SETTINGS

Analogue Settings for All UK1A N2R* and N2S*

38 38 38 25 25

50 50 50 50 50

30 30 30 33 33

N2RJ N2RK N2RL N2SJ N2SL

PICTURE

Brightness

35 35 35 35 35

Contrast

Colour

Sharpness

47 47 47 30 30

63 63 63 63 63

35 35 35 40 40

40 40 40 40 40

Brightness

Contrast

Colour

Sharpness

31 31 31 25 25

32 32 32 35 35

30 30 30 35 35

32 32 32 35 35

Brightness

Contrast

Colour

Sharpness

00000

Off Off Off Off Off

Dyn skin tone

10 10 10 10 10

Max Max Max Max Max

TXT Brightness

SOUND

Volume

Balance

00000

Off Off Off Off Off

Normal Normal Normal Normal Normal

Bass

Treble

Sound Preset

BBE

Surround

OPTION

OSD H-Pos 66666

Country EU UK EU EU EU

Sort Mode Sorting Sorting Sorting Sorting Sorting

Plug+Play On On On On On

Welcome Txt On On On On On

Surround On On On On On

Bass Feature BBE+Bass Exp BBE+Bass Exp BBE+Bass Exp BBE+Bass Exp BBE+Bass Exp

AVL Off Off Off Off Off

AV3 OnOnOnOnOn

Colour System Off Off Off Off Off

AFC Off Off Off Off Off

Program Name On On On On On

TXT no signal On On On On On

Blue Back Off Off Off Off Off

Digital Mode Off On Off Off Off

Scart 22222

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N2RL

IC Descriptions for UK1A

IC001

This is an LA42052 which is the audio amplifier for the set. It has left and right inputs from the LOC and left and right outputs to the speakers and headphone socket. It also has mute and standby functions which are activated by the

LOC as appropriate.

IC1101 (monitor sets only)

This is a switching IC, NJM2233BM, which allows the sync signal input on monitor sets to be switched between pin 20 of SCART 1 (conventional & ALBOS) and pin 14 of SCART 1 (SIS signal). The IC takes a 5V supply and is switched by the control line SC2_8, which is normally used for SCART 2 pin 8 signalling but is adapted fro the moni-

tor sets.

IC1205

This a ROHM BA7603F triple video switch which allows the RGB input to be switched between SCART 1 and SCART 2. The switch is controlled by the RGB_SW line from the IC.

IC2001

This is a picture improvement chip, Philips TDA9178, which takes a YUV input from the LOC and carries out vector processing of luminance and colour to improve overall picture quality and reduce noise. The IC requires an 8V

power supply and is also connected to the I2C bus.

IC201

This is the Philips LOC 1 chip which is the main system processor. It consists of three ICs encapsulated in one BGA package with 388 balls. The “Cosmic” and “Picasso” chips carry out analogue and digital processing respectively, and together from the UOC III which is used in many other sets. These are complemented by the Lithium IC which carries out digital processing and scaling functions. The IC requires 5V, 3.3V and 1.8V for correct operation – although only 5V and 3.3V are required in “standby”

mode. Full descriptions of all port functions are given elsewhere in this manual.

IC1221(digital only)

This is a ROHM BA7609F triple video switch which allows audio and video from the digital system to be output to the SCART 2 socket for recording. The IC is controlled by the REC_CTL signal from the MCU IC860.

IC4001

This is a SST SST39VF020 CMOS multi-purpose flash with a capacity of 2Mbits. It is connected to the LOC using address lines, data input/output, write enable and control lines. The flash IC is powered by the 3V3 SW supply.

IC4002

This is a ROHM BD5260G open drain voltage detector IC which works in conjunction with the backlight enable line BL_EN. It takes input from the main power and the 5V CPU line.

IC6600

This is a chopper regulator, Sharp PQ1CY series, which provides the power for the LCD panel – 3.3V for 15” and 20”, 5V for 17” and 23”. The regulator is switched on at power up via the control line POWER 1 and transistor

Q6600. The power is switched to the panel, also by POWER 1, via the FET switch Q1600.

IC6602

This is a Sharp PQ1CZ series chopper regulator which provides the 14V supply for the audio IC. It is switched by the control line POWER 1 from the LOC.

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N2RL

IC Descriptions for UK1A (continued)

IC6603(digital only)

This is a Sharp PQ1CZ series chopper regulator which provides the 6V supply for the digital module, hence it is only present on digital sets. The regulator is switched by the POWER 1 control line from the LOC.

IC6604

This is a linear voltage regulator providing in this case 8V to supply the picture improvement IC IC2001. The regulator is switched by the control line POWER 1.

IC6605

This is a chopper regulator, Sharp PQ1CY series, which provides 6V. This voltage is clamped by a diode after the regulator to produce 5V CPU. This voltage is passed to IC 6606.

IC6606

This is a linear voltage regulator, ROHM BA05SFP, which takes the 6V from IC6605 as an input and produces 5V SW. This regulator is controlled by the POWER 1 control line from the LOC.

IC6607

This is a linear voltage regulator which takes the 6V from IC6605 and produces 3V3 STB used by the LOC in standby mode.

IC6608

This is a ROHM BA00BC0WFP linear regulator which converts the 6V from IC6605 to the 1V8 use by the LOC when the set is powered on. This regulator is controlled by the POWER 1 control line.

IC6642

This is also a ROHM linear regulator which takes the 5V SW from IC6606 as an input and produces 3V3 SW used by various parts of the circuit.

IC701 (20” LCD only)

This is a THine THC63LVDF84B LCD panel interface which converts 4 LVDS data streams from the LOC into 28bits of RGB data and a clock to send to the panel. Currently this IC is only required on 20” LCD sets where the panel requires data in RGB form rather than LVDS.

The IC requires a 3V3 power supply on several pins.

IC801

This is the non-volatile memory(NVM) IC which contains data settings for the LOC and stored user data such as picture settings and programs. It also contains data relating to the LCD panel type and data requirements. It is a 24C64 64K EEPROM arranged as 8192 x 8bits. It uses the 3V3 STB power supply and is connected to the LOC via the

12C bus.

IC860(digital only)

This is a Renesas RSF21162SP microprocessor which acts as a controller for the digital module via the I2C bus and the D/A_CTL and REC_CTL line to IC1251 and IC1221. This IC has a small amount of memory which contains the

ICs program, this is programmed separately from the LOC program via the KSUB socket.

IC861(digital only)

This is a ROHM BD4828G CMOS voltage detector which controls the reset line to the IC860 microprocessor.

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N2RL

To enter to the Service Mode

+ Press and hold the GREEN button on the remote control and then press the P▼ button on the cabinet.

To select the service item and change data value

+ To select the adjustment item, use the P▲ or P▼ button. + To change the service data, use the Volume -(LEFT) or Volume + (RIGHT) button.

+ The data which is set in the service mode is stored into the memory IC automatically.

EXAMPLE: 000 GTV 4.0 E4.17

ITEM NO SECTION VALUE

ITEM

Exit from the Service Mode

+ Press the MENU button or turn off the TV set by using the Mains switch.

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N2SL

SERVICE DATA

Software ver E417Model: N2RL NVM file: N2RL_070405_5C4E

items marked have changed from previous NVM data

# item value # item value # item value # item value

0 Soft. Version E417 60 MUS 0 120 9178 CTI-RF 1 180 CHSE 2 1 Init TV 0 61 2 ISP Mode 0 62 CB 0 122 9178 SP-RF 32 182 NUEL 200 3 Sedna version 10601 63 CB PF PAL 0 123 9178 CR-RF 32 183 DSG 1 4 PWT 0 64 CB AV NT 0 124 9178 LW-RF 32 184 FMWS 1

DCXO

5 6 DCXO Auto 0 66 FCO 0 126 PeakFrq-RF 3 186 PA-BA-MU 48 7 WSS 1 67 PeakFreqPAL443 3 127 SCA Lit H Flt-RF 30 187 PA-TR-MU 45 8 WPR 20 68 PeakFreqPALM 3 128 SCA Lit V Flt-RF 27 188 PA-BA-TK 28

9 WPG 20 69 PeakFreqPALN 3 129 9178 CFS-AV 1 189 PA-TR-TK 40 10 WPB 20 70 PeakFreqNTSC443 3 130 9178 VDC-AV 1 190 PA-BA-NR 32 11 BLOR 20 71 PeakFreqNTSCM 3 131 9178 CDS-AV 0 191 PA-TR-NR 32 12 BLOG 20 72 PeakFreqSECAM 3 132 9178 CTI-AV 1 192 BEEP-VOL 35 13 WPR-SECAM 0 73 PeakFreqAV 3 133 9178 PK-AV 35 193 BEEP-FRQ 4 14 WPG-SECAM 0 74 Tint Def 32 134 9178 SP-AV 32 194 AGC Speed 1 15 WPB-SECAM 0 75 Tint NT 0 135 9178 CR-AV 20 195 AGC Take over 27 16 BLOR-SECAM 0 76 Blackstretch 1 136 9178 LW-AV 32 196 OIF 32 17 BLOG-SECAM 0 77 Bluestretch 0 137 UOC COR-AV 3 197 VA 3 18 reserve 32 78 Whitestretch 0 138 UOC PeakFrq-AV 3 198 VAI 0

reserve

RGB Bright

TXT MIN 6 81 BSD 0 141 HPOS50 425 201 BPB 0

21 22

TXT MID 16 82 AAS 0 142 VPOS50 14 202 BPB2 1

23 TXT MAX 31 83 PeakRatioOvShot 0 143 203 TXT-H-POS 10 24 BR RF PN 245 84 RatioPreAftShot 0 144 204 TXT-H-POSA 24 25 BR AV 245 85 CRA0 0 145 SACR 17 205 TXT-H-POSB 6 26 BR RGB 245 86 DL 0 146 SACG 17 206 OSD-H-POS 6 27 BR S 245 87 Tint NTSC 31 147 SACB 17 207 28 CN RF PN 0 88 OSO 0 148 SAGR 31 208 PGR 45 29 CN AV 0 89 FSL 0 149 SAGG 31 209 PGG 45 30 CN RGB 0 90 HP2 0 150 SAGB 31 210 PGB 45 31 CN S 0 91 SoftClipLevel 0 151 reserve 32 211 BackLight 63 32 SH RF PN 0 92 33 SH AV 0 93 34 SH RGB 0 94 AMS 1 154 reserve 58 214 BL PWMFreq 240 35 SH S 0 95 LDH 1 155 reserve 63 215 GAMMA 32 36 CL RF P 0 96 FHS 0 156 OP AUDIO CON 2 216 BRIFE 55 37 CL AVP 0 97 WLB 1 157 OP DUB DBE 0 217 SATBE 35 38 CL N 0 98 DEM 0 158 AVL-LEV 5 218 CONBE 35 39 CL S 0 99 CD2-0 0 159 AVL-WGT 0 219 PANEL 0 40 CL RGB 0 100 OSP 0 160 AVL-MOD 3 220 41 PV-BR-DY 47 101 WPO 0 161 LOUD-NA 3 221 EGL 0 42 PV-CL-DY 35 102 DSK 1 162 LOUD-CH 0 222 RBL 0 43 PV-CT-DY 63 103 ASK 0 163 BBE-CONT 10 223 FILT BW M 0 44 PV-SH-DY 40 104 WSK 0 164 BBE-PROC 10 224 FILT BW 2 45 PV-BR-ST 38 105 SSK 1 165 OP CLIP 0 225 SCAN TIME 6 46 PV-CL-ST 30 106 DGR 1 166 ADC-AV-L 16 226 Phi 1 2 47 PV-CT-ST 50 107 GGR 0 167 DEC-LEV 16 227 reserve 32 48 PV-SH-ST 35 108 WGR 0 168 MONO-LEV 16 228 reserve 0 49 PV-BR-EC 31 109 SGR 1 169 NIC-LEV 16 229 reserve 32 50 PV-CL-EC 30 110 DBL 0 170 SAP-LEV 16 230 reserve 32 51 PV-CT-EC 32 111 GBL 0 171 E2D 0 231 reserve 63 52 PV-SH-EC 32 112 SBL 0 172 FFI 0 232 reserve 41 53 CLO SECAM 0 113 BON 0 173 MR VOL L 63 233 reserve 58 54 DTR SECAM 1 114 BT5-0 0 174 MR VOL H 4 234 reserve 63 55 YSECAM 12 115 NL5-0 0 175 L HI CUT 26 235 POS chg 30 56 YNTSC 0 116 VG5-0 32 176 ASD SC1 THR 16 236 POS chg no sig 40 57 YPAL 4 117 9178 CFS-RF 1 177 AGN 0 237 zoom or txt 30 58 YAV 4 118 9178 VDC-RF 1 178 OVMADAPT 0 238 dcxo swing 96 59 ACL 0 119 9178 CDS-RF 0 179 OVMTHR 0 239

48 65 BPS 0 125 UOC COR-RF 3 185 CV2 0

32 79 GAM 0 139 SCA Lit H Flt-AV 38 199 SVO 0 29 80 PWL 0 140 SCA Lit V Flt-AV 27 200 GD 1

PWLDAC 8 121 9178 PK-RF 35 181 NLEL 100

CL 0

FO Picture booster

0 152 reserve 63 212 BL PWMMin 0 1 153 reserve 41 213 BL PWMMax 255

LPG 1

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N2RL

BLOCK DIAGRAM

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

)

Outline

20"

VGA

LCD panel

XGA / WXGA

XGA/WXGA

15", 17", 23"

Digital i

IC860

sub cpu

RSF21162SP

IC1251

BA7603F

YUV switch

IC801

64K NVM

(digital on

I2C

TTL

IC701

LVDS to TTL

THC63LVDF84B

IC201 LOC1 TDA15521E

Lithium

Cosmic

LVDS

Picasso

control

IC4001

SST39VF020

IC2001

TDA9178

2Mb flash

power regulators

IC6600 - IC6609, IC 6642

Power Input

RGB

SAW

video

sound

IC1205

BA7603

RGB switch

tuner

A101

UHF/VHF

SCART 1 SCART 2

sync

video & aud

IC1101

sync switch

NJM2233BM

(monitor only

IC001

LA42052

audio amplifier

side AV

headphone

audio, video

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N2SL

Power Operation

Mains power on, set in "standby", 5V

3V3 STB are available via IC6605 and

When set powers on a HIGH on control

"power 1" switches on regulators to

other voltages required by set.

Power failure at any of these suppli

to the LOC by either "P_FAIL 1" or "P

depending on which supply has failed.

will force the set back into standby.

Once all the voltages are present th

will be enabled by "power 3" via FET

Q1600.

In digital sets the failure of the di

power from IC6603 will be signaled b

DM" to the LOC

ower swIC6600

anel

Q1600

IC6604

UK1A Power - Block Diagram

power 3

from LOC

ital modul

14V audio

6V di

IC6603

5V CPU

to LOC

digi power f

5V SW

3V3 SW

IC6642

3V3 STB

IC6607

1V8 SW

IC6608

IC6602

power input

IC6605 IC6606

to LOC

power fail

to LOC

power 1

from LOC

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N2RL

IC201

BLOCK DIAGRAMS

FLASH

INTERFACE

µC

SLAVED

SRAM

GPIO

GLOBAL

PANEL

PWM

FONT

CONTROL

PLL

OSD

8k ROM

12k RAM/

MIXER

OVERLAY

SCALER

UP/DOWN

LINE

MEMORY

LUT

OUTPUT

COLOUR

AUTO

UNIT

DITHER

MATRIX

ADJUST

LVDS

(single

or dual

OUTPUT

INTERFACE

INPUT SELECT

pixel)

TEST

IMAGE

ANALOG

INTERFACE

LINE

GENERATOR

C I

(AVI)

PLL

LOC I series

Backend

DDC

PC/HD IN

(RGB H/V sync)

I/Os

LS-OUT

HP-OUT

4 AUDIO IN

1 AUDIO OUT

SSIF

QSSO/AMOUT

REFO

VOLUME

AUDIO CONTROL

A/D

AUDIO

SELECT

SOUND PLL

DEEMPHASIS

AGC

SWITCH

QSS MIXER

QSS SOUND IF

DACs

FEATURES

TREBBLE/BASS

D/A

A/D CONVERTER

MULTI-STANDARD

AM DEMODULATOR

PAL/SECAM/NTSC

STEREO DEC.

PLL DEMOD.

VISION IF/AGC/AFC

256K FLASH

REF

DECODER

BASE-BAND DL

VIDEO AMP.

SOUND TRAP

GROUP DELAY

MAIN µC &

DIGITAL

H/V

BCR

DECODER

TELETEXT

BL R G

2H/4H

COMB FILTER

Y DELAY ADJ.

VIDEO IDENT.

VIDEO SWITCH

VIDEO FILTERS

RGB MATRIX

TEXT INSERT

BLUE STRETCH

RGB CONTROL

INSERT

RGB/YP

H/V SYNC SEP.

BLACK STRETCH

YUV

/ UV DELAY

YUV INTERFACE

PEAKING

SKIN TONE / U/V TINT

VERTICAL

H-OSC. + PLL

COUNTDOWN

Vi Ui

Vo Uo Yo Yi

G/Y

B/P

R/P

RG B

B/P

(Cx)

R/P

G/Y

(CVBSx/Yx)

SWO1 BL

SIFIN/DVBIN

VIFIN

IFVO/SVO/

AGCOUT

DVBO/FMRO

DVBO/IFVO/

FMRO

CVBSI

YSYNC

CVBS3/Y3

C2/C3

CVBS2/Y2

CVBS4/Y4C4CVBSO/

PIP

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N2SL

IC BLOCK DIAGRAMS

IC001 LA42052 <Audio Output>

Vcc

IC1205 BA7603F

STAND BY

5 7

INPUT AMPLIFIER

IN 1

REFERENCE

IN 2

INPUT AMPLIFIER

RIPPLE FILTER

AMPLIFIER

OUTPUT AMPLIFIER

THERMAL PROTECTION CIRCUIT

OUTPUT AMPLIFIER

POP NOISE PREVENTION BLOCK

P.P

OUT 1

POWER

GND

OUT 2

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