Sanyo CE27LC4-C Schematic
Part No. SKSM0801 N2WL JUNE 2005
Colour Television
Service Manual
Model CE27LC4-C
Service Ref. No. CE27LC4-C-00
PRODUCT CODE: 111376210
ORIGINAL VERSION: Chassis No. UK2A
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
CE27LC4-C
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
Please use Schematic Diagram SKP20535 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.
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N2WL
SAFETY PRECAUTION
PRODUCT SAFETY NOTICE
SPECIFICATIONS
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.
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
VHF: A-J, E2-E12
CATV: X, Y, Z, S1-S41
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
AV3: INPUT: Composite video and Audio L/R
OUTPUT: No output
Front AVterminal
AV4: RCA jacks
INPUT: Composite video and Audio L/R
Headphone socket Mini Jack
Sound output(Music) 10W x 2
Dimensions (WxHxD) 800 x 470 x 239mm
Weight 14.1 Kg
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 safe-
ty 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 .
!
!
!
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 mark and recycle system are applied only to EU countries and are not applied
to other countries of the world.
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N2WL
BLOCK DIAGRAM
This is a diagram for all models and therefore differs slightly from the actual block diagram.
LCD PANEL
LVDS
THC63
LVDM83R
LCD - TV
LVDS CABLE
10 PAIRS
BLOCK DIAGRAM
This is a diagram for all
models and therefore
differs slightly model by
model
9PIN DIN
SERVICE SOCKET
NVM
12C BUS
12C BUS
IC805
M29W160E
FLASH
IC804
SD RAM128MB
IC803
SD RAM128MB
IC802
M24C64
NVM
(EEPROM) 64KB
16KB
DATA
DATA
DATA
IC2001
IC1CCI
ADD-
RESS
ADD-
RESS
ADD-
RESS
STV2310
VIDEO PROCESSOR
SCALER IC
ADE3800XLM
IC8O1
STV3600
&
VIDEO PROCESSOR
Y/CR/CB
8 LINES
Y/PR/PB
12C BUS
IC1251
OR
RGB
3 LINES
BA7603F
Y/U/V SWITCH
AV RGB
OR
DIGITALY/U/V
IN
IC1801
SUB CPU
M16C/26
IC3451
STV8216
AUDIO PROCESSOR
12C BUS
I2C BUS
L & R
AUDIO
BUS0
(BBE)
BUS1
(MACH-3)
DIGITAL MODULE
CONTROL BUS
IC001
LA4919
AUDIO AMP
L & R AUDIO
FOR HEADPHONES
SPEAKERS
10WX2
L & R
AUDIO
IC3501
NJM2155M
SOUND
ENHANCEMENT
AUDIO PROCESSOR
ADDRESS/DATA/CLOCK
3 LINES
DIGITAL MODULE
CONTROL BUS
ANALOG
ANALOG
VIDEO
AV RGB
IN
DIGITAL
Y/U/V IN
AUDIO
Y/U/V
DIGITAL
VIDEO
L & R
DIGITAL
AUDIO
DIGITAL
AUDIO IN
TC4052
AV AUDIO IN
SWITCH
AUDIO IN
AV4 AUDIO IN
AUDIO
AV2
IC101
X121
IDA9886
VIF SAWF
AV1 AUDIO IN
AV2 AUDIO IN
AV OR DIGITAL
AV4
VIDEO
IN
AV1 AUDIO OUT
IC 1221
AV3 AUDIO IN
TV OUT1
IC1224
BA7626F
TV VIDEO
AV2
VIDEO
IN
SWITCH
AV3
VIDEO IN
IC1205
BA7603F
AV1
VIDEO
IN
RGB SWITCH
IF DETECTOR
12C BUS
SIF SAWF
X121
TV OUT2
12C BUS
AV2 RGB
SCART2-AV2
AV-LINK
RGB
V-I/O
IN
A-I/O
RC-IN
SCART3-AV3
AV-LINK
V - IN
A - IN
AV4
V - IN
A - IN
A - IN
A101
TUNER
SCART1-AV1
RGB
V-I/O
A-I/O
RC-IN
IC1221
BA7609F
DM OUT
AV2
AUDIO OUT
SWITCH
VIDEO
OUT
AUDIO OUT
V - OUT
A - OUT
ANALOG
VIDEO
VIDEO
OUT
DIGITAL
MODULE
DIGITAL
VIDEO
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N2WL
CABINET DISASSEMBLY
CABINET BACK DISASSEMBLY
1. Remove 11 screws marked A for 27”
2. Pull out the cabinet back.
A
A
A
A
A
A
A
A A
A
A
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N2WL
OPTION SETTING
[After replacing the Memory IC (IC802)]
The memory IC, IC802, stores the option data of the TV set and service adjustments data for each circuit, therefore,
when the memory IC is replaced, it should be set up following these settings and “SERVICE ADJUSTMENTS” on
the next page.
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
window 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.
Following table shows the available option items and default setting mode.
Exit from the Service Mode
+ Press the MENU button.
Option Mode Mode Description & Note
ON-TIMER ON or OFF On-timer available, default “OFF”
PLUG AND PLAY ON or OFF Plug and Play mode, default “ON”
WELCOME TEXT ON or OFF Display message when first set up, default “ON”
BBE ON or OFF BBE sound mode, default “ON”
AUTO VOLUME OFF or ON Default “OFF”
HEADPHONE ON or OFF Headphone control , default “OFF”
CRT 16:9 MODE ON or OFF Default “ON”
NOISE REDUCTION ON or OFF Default “ON”
COUNTRY UK, IRE, UK/IRE, EU TV system, default “EU”
RASTER ROTATION ON or OFF Default “OFF”
SESA ON or OFF Default “OFF”
DIGITAL RC ON or OFF Digital option, default “ON”
LIGHT MONITORING ON or OFF Ambient light control of LCD brightness,default “OFF”
VIDEO MUTE ON or OFF Default “OFF”
OPTION MODE FOR CE27LC4-C-00
ON-TIMER OFF
PLUG AND PLAY ON
WELCOME TEXT ON
BBE ON
AUTO VOLUME OFF
HEADPHONE OFF
16:9 MODE ON
NOISE REDUCTION ON
COUNTRY EU
RASTER ROTATION OFF
SESA OFF
DIGITAL RC ON
LIGHT MONITORING OFF
VIDEO MUTE OFF
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N2WL
SERVICE ADJUSTMENTS
INITIALISATION OF MEMORY IC
To initialise the memory IC (IC802), enter the service mode as below, navigate to “EEPROM Reset” and press OK
on the remote control. Turn the mains power off and on - the initialisation is now complete.
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, readjust the service adjustments 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.
Others : ONLY use for greyscale adjustment
DO NOT ADJUST OTHER SETTINGS
[After replacing the Memory IC (IC803)]
The memory IC, IC802, 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.
While pressing the green button on the remote control press the
P▼ on the cabinet front.
The service menu appears.
Use the 6or 5 to highlight the service menu you require and press the F/OK button to enter.
Press the Menu button to navigate backwards through the service menus until menus disappear.
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.
TO ENTER SERVICE ADJUSTMENTS
TO EXIT SERVICE ADJUSTMENTS
Service
SV V ers 042
Sound
Video
Other
STV8206
TDA9885
STV2310
ADE3800
WSS
EEPROM Reset
IMPORTANT NOTICE
Do not attempt to adjust service adjustments not listed on the above otherwise it may cause
loss of performance and product safety.
-7-
N2WL
Service menu: Video
Enter the service adjustment menu as described on the previous page and select “Video” using
the P▼ or P▲ buttons and then press the F/OK button to enter.
Use the
P▼ or P▲ 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 P▼ or P▲ buttons and then press the F/OK button to enter.
Use the
P▼ or P▲ 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
P▼ or P▲ buttons and then press the F/OK button to enter
Use the
P▼ or P▲ buttons to select the option,
then press the
F/OK button on the remote
control to enter.
Audio Menu
¥ VL’ AGC Ads
Prescl Scart
Prescl FM
Prescl Nicam
Reserve sound
0
3
10
10
13
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
TDA9885
Write 1 70
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N2WL
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.
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 P▼ or P▲ buttons select “Write 1”
5. Adjust using the or buttons until the readout from the voltmeter is 3.2 Vdc.
SCREEN ADJUSTMENT
1. Make sure the set is warm (20 mins)
2. Receive Black and White picture/pattern
3. Enter service menu “Others”
4. Use the +P and -P keys to navigate to item no 51
(white bal R) or no. 52 (white bal G)
5. Using the or buttons adjust to make the
white, white.
GREY SCALE ADJUSTMENT
AGC ADJUSTMENT
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N2WL
CPU PORT FUNCTIONS
IC801
36
37
38
39
40
ADDR_9
ADDR_11
ADDR_13
ADDR_12
41
ADDR_8
42
ADDR_7
43
ADDR_6
ADDR_5
44
45
ADDR_4
CKOUT_SDRAM
46
VDD33_IO
47
48
VSS_IO
49
CKIN_SDRAM
ADDR_3
50
ADDR_2
51
ADDR_1
52
ADDR_0
53
ADDR_10
54
ADDR_16
55
ADDR_15
56
NOT_CS_SDRAM
57
NOT_RAS
58
59
NOT_CAS
RD_NOTWR
60
NOT_BE0
61
VDD12_CORE
62
VSS
63
VDD33_IO
64
VSS_IO
65
NOT_CS_FLASH
66
ADDR_17
67
68
ADDR_18
ADDR_19
69
ADDR_14
70
VDD12_CORE
71
VSS
72
FLASH_D15
73
74
FLASH_D7
75
FLASH_D14
FLASH_D6
76
77
FLASH_D13
FLASH_D5
78
79
FLASH_D12
FLASH_D4
80
NOT_BE1
VSS_IO82VDD33_IO83FLASH_D1184FLASH_D385FLASH_D1086FLASH_D287FLASH_D988FLASH_D189FLASH_D890FLASH_D091VSS92VDD12_CORE93TMS94TCK95TDO96TDI97TRST98NRESET99VSS
81
35
VSS_IO
33
34
VDD33_IO
32
SDRAM_D9
SDRAM_D8
30
31
SDRAM_D11
SDRAM_D10
28
29
SDRAM_D13
SDRAM_D12
26
27
SDRAM_D15
SDRAM_D14
24
25
VDD33_IO
VSS_IO
18
19
20
21
22
23
SDRAM_D5
SDRAM_D4
SDRAM_D3
SDRAM_D2
SDRAM_D1
SDRAM_D0
IC801
STV3600BM
VDD12_CORE
VCC12_PLL2
GND_PLL2
VCC12_PLL3
100
101
102
103
16
17
SDRAM_D7
SDRAM_D6
GND_PLL3
XTALIN
104
105
14
15
VSS
VDD12_CORE
XTALOUT
VCC12_IO
106
107
12
13
VDD33_IO
GND_IO
108
VSS_IO
CLKXTM
109
10
11
PORTA3/LCD_BR
PORTA2/PLL_LOCK
CLKXTP
VSS_PLL
110
111
8
9
PORTD3/AV_CTL_B
PORTD6/POWER_FAIL2
VDD12_PLL
SHIELD_PLL
112
113
5
6
7
PORTD2/50/60HZ
PORTD1/LCD_ON
PORTD0/AV_CTL_A
PORTA5/MUTE/FLASH_RXD
VSYNC
HSYNC
CLK_DATA
114
115
116
1
2
3
4
PORTC7/SCL
PORTC6/SDA
PORTC5/SCL_NVM
PORTC4/SDA_NVM
CLK_DFL/PIP_CLK
VCC33_DAC
GND_DAC
PB_B
GND_REXT
REXT
SHIELD_ADCDAC
GND_ADC
VCC33_ADC
PORTD5/POWER1
PORTB0/POWER_SW
PORTB1/KEYBOARD
PORTB2/SC1_8
PORTB3/SC2_8
PORTB4/SC3_8
PORTB5/AGC
VSS_IO
VDD33_IO
PORTA7/STATUS/FAN_CTL
PORTA6/SEL
PORTA4/LED/FLASH_TXD
PORTD7/POWER_INFO
PORTA1/POWER_FAIL1
PORTD4/RC_IN
PORTA0/NRESET_OUT
PORTC0/SDA_ADE3800
PORTC1/SCL_ADE3800
PORTC2/AV_CTL_C
PORTC3/POWER3
VDD12_CORE
YCRCB7
YCRCB6
YCRCB5
YCRCB4
YCRCB0
YCRCB1
YCRCB2
YCRCB3
117
118
119
120
H100
V100
Y_G
PR_R
VSS
160
159
158
157
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
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N2WL
IC801
IC BLOCK DIAGRAMS
NRESET
YCRCB[7:0]
CLK_DATA
HSYNC
VSYNC
YCRCB[7:0]
27 MHz
Crystal
Build-Up
Counter
HV Filter
8
TNR
SDIN
Block
8
PIPIN
H/V Filter
Clock
Generator
CLKXTP
CLKXTM
CLK_DFL
Video
Pipeline
YSI/CTI
Saturation
OSD
Pipeline
ST20 Core
TV Peripherals
TV Chassis Control
Compositor
Picture
Comp.
Cursor
BG
Plane
Fast Blanking
CSA
2D
Block Move
30
I/Os
Triple
DAC
EMI4
Time Base
Generator
PR_R
Y_G
PB_B
SDRAM
16/32
Flash
H100
V100
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N2WL
IC001 LA4919NE <Audio Output>
IC BLOCK DIAGRAMS
IC3451 STV8216T <NICAM & Stereo Sound Decoder>
S
Sound
Monon
nutS
Demodulation
Multi-Standard
DiitalStereo
Demodulator
Diital
udio
Matri
udioMatriin
udioroein
oudeaerudioroein
eadoneudioroein
oerSulManaement
oudeaer
Suooer
eadone
ututSart
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