Sanyo CE23LC4-C User manual

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.

-2-
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 AV terminal
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 collec-
tion / 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 mark and recycle system are applied only to EU countries and are not applied
to other countries of the world.

-3- 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.
i
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
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
OPTION MODE FOR CE23LC4-C-00

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N2RL
OPTION SETTINGS
N2RJ N2RK N2RL N2SJ N2SL
PICTURE Brightness 38 38 38 25 25 Contrast 50 50 50 50 50 Colour 30 30 30 33 33 Sharpness 35 35 35 35 35 Brightness 47 47 47 30 30 Contrast 63 63 63 63 63 Colour 35 35 35 40 40 Sharpness 40 40 40 40 40 Brightness 31 31 31 25 25 Contrast 32 32 32 35 35 Colour 30 30 30 35 35 Sharpness 32 32 32 35 35 Dyn skin tone Off Off Off Off Off TXT Brightness Max Max Max Max Max SOUND Volume 10 10 10 10 10 Balance 00000 Bass 00000 Treble 00000 Sound Preset Normal Normal Normal Normal Normal BBE Off Off Off Off Off Surround Off Off Off Off Off
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
Analogue Settings for All UK1A N2R* and N2S*

-5- 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 regula-
tor 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 stand-
by 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 pic-
ture 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.

-7- 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.

-8-
N2SL
# 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 PWLDAC 8 121 9178 PK-RF 35 181 NLEL 100
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
5DCXO 48 65 BPS 0 125 UOC COR-RF 3 185 CV2 0
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
19 reserve 32 79 GAM 0 139 SCA Lit H Flt-AV 38 199 SVO 0
20 RGB Bright 29 80 PWL 0 140 SCA Lit V Flt-AV 27 200 GD 1
21 TXT MIN 6 81 BSD 0 141 HPOS50 425 201 BPB 0
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 CL 0
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 FO0 152 reserve 63 212 BL PWMMin 0
33 SH AV 0 93 Picture booster 1 153 reserve 41 213 BL PWMMax 255
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 LPG 1
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
items marked have changed from previous NVM data
Software ver E417Model: N2RL NVM file: N2RL_070405_5C4E
SERVICE DATA

-9- N2RL
BLOCK DIAGRAM
This is a diagram for all models and therefore differs slightly from the actual block diagram.
TTL
side AV
audio, video
headphone
RGB
sync
video & aud
i
IC001
audio amplifier
LA42052
I2C
IC201 LOC1 TDA15521E
LVDS
IC1205
BA7603
RGB switch
Cosmic
Picasso
Lithium
IC701
THC63LVDF84B
LVDS to TTL
IC2001
TDA9178
IC4001
SST39VF020
2Mb flash
IC1101
sync switch
(monitor only
)
NJM2233BM
A101
tuner
UHF/VHF
IC801
64K NVM
IC1251
BA7603F
YUV switch
(digital on
SAW
sound
SAW
video
SCART 1 SCART 2
Power Input
power regulators
IC6600 - IC6609, IC 6642
control
Digital i
n
IC860
RSF21162SP
sub cpu
(digital on
XGA / WXGA
LCD panel
VGA
20"
LCD panel
XGA/WXGA
15", 17", 23"
Outline

-10-
N2SL
UK1A Power - Block Diagram
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
p
other voltages required by set. Power failure at any of these suppli
e
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
e
will be enabled by "power 3" via FET Q1600. In digital sets the failure of the di power from IC6603 will be signaled b
y
DM" to the LOC
power 3
from LOC
power input
power 1
from LOC
power fail
to LOC
Q1600
p
anel
p
ower swIC6600
IC6604
14V audio
IC6608
8V 3V3 SW 3V3 STB 1V8 SW
digi power f
a
to LOC
IC6603
IC6605 IC6606
IC6607
6V di
g
ital modul
e
5V CPU 5V SW
IC6642
power fail
to LOC
IC6602