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 volt-
age 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 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.
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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
THC63
LVDM83R
LVDS
IC1CCI
ADE3800XLM
SCALER IC
LVDS CABLE
10 PAIRS
Y/PR/PB
OR
RGB
3 LINES
IC1801
SUB CPU
M16C/26
I2C BUS
LCD - TV
BLOCK DIAGRAM
This is a diagram for all
models and therefore
differs slightly model by
model
DIGITAL MODULE
CONTROL BUS
IC001
LA4919
AUDIO AMP
SPEAKERS
10WX2
IC8O1
STV3600
&
VIDEO PROCESSOR
IC3501
NJM2155M
SOUND
ENHANCEMENT
AUDIO PROCESSOR
IC1221
BA7609F
DM OUT
SWITCH
DIGITAL
MODULE
V - OUT
A - OUT
A - IN
V - IN
A - IN
IC 1221
TC4052
AV AUDIO IN
SWITCH
IC3451
STV8216
AUDIO PROCESSOR
IC1251
BA7603F
Y/U/V SWITCH
IC1205
BA7603F
RGB SWITCH
IC1224
BA7626F
TV VIDEO
SWITCH
IC805
M29W160E
FLASH
16KB
IC802
M24C64
NVM
(EEPROM)
64KB
IC803
SD RAM
128MB
IC804
SD RAM
128MB
IC2001
STV2310
VIDEO PROCESSOR
A101
TUNER
IC101
IDA9886
IF DETECTOR
X121
VIF SAWF
X121
SIF SAWF
V - IN
A - IN
RGB
V-I/O
A-I/O
RC-IN
AV-LINK
RGB
V-I/O
A-I/O
RC-IN
AV-LINK
9PIN DIN
SERVICE SOCKET
12C BUS
NVM
12C BUS
DATA
DATA
DATA
ADD-
RESS
ADD-
RESS
ADD-
RESS
12C BUS
12C BUS
SCART1-AV1
SCART2-AV2
SCART3-AV3
ANALOG
VIDEO
AV RGB
IN
TV OUT1
TV OUT2
AV1
VIDEO
IN
AV2
VIDEO
IN
AV4
VIDEO
IN
AV2 RGB
IN
AV3
VIDEO IN
AV1 AUDIO IN
AV2 AUDIO IN
AV1 AUDIO OUT
DIGITAL
Y/U/V IN
AV4 AUDIO IN
AUDIO IN
AV OR DIGITAL
AUDIO IN
DIGITAL
AUDIO
AV4
AUDIO OUT
AV2
AUDIO OUT
AV2
VIDEO
OUT
VIDEO
OUT
ANALOG
VIDEO
ANALOG
AUDIO
DIGITAL
VIDEO
Y/U/V
DIGITAL
VIDEO
DIGITAL MODULE
CONTROL BUS
L & R
DIGITAL
AUDIO
L & R
AUDIO
L & R AUDIO
FOR HEADPHONES
Y/CR/CB
8 LINES
12C BUS
12C BUS
L & R
AUDIO
BUS0
(BBE)
BUS1
(MACH-3)
ADDRESS/DATA/CLOCK
3 LINES
AV RGB
OR
DIGITALY/U/V
IN
AV3 AUDIO IN
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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”
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
OPTION MODE FOR CE27LC4-C-00
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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.
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
Audio Menu
¥ VL’ AGC Ads
Prescl Scart
Prescl FM
Prescl Nicam
Reserve sound
0
3
10
10
13
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 read-
out 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
STV3600BM
IC801
2
PORTC6/SDA
3
PORTC5/SCL_NVM
4
PORTC4/SDA_NVM
5
PORTD0/AV_CTL_A
6
PORTD1/LCD_ON
7
PORTD2/50/60HZ
8
PORTD3/AV_CTL_B
9
PORTD6/POWER_FAIL2
10
PORTA2/PLL_LOCK
11
PORTA3/LCD_BR
12
VSS_IO
13
VDD33_IO
14
VSS
15
VDD12_CORE
16
SDRAM_D7
17
SDRAM_D6
18
SDRAM_D5
19
SDRAM_D4
20
SDRAM_D3
21
SDRAM_D2
22
SDRAM_D1
23
SDRAM_D0
24
VSS_IO
25
VDD33_IO
26
SDRAM_D15
27
SDRAM_D14
28
SDRAM_D13
29
SDRAM_D12
30
SDRAM_D11
31
SDRAM_D10
32
SDRAM_D9
33
SDRAM_D8
34
VDD33_IO
35
VSS_IO
36
ADDR_13
37
NOT_BE1
38
ADDR_12
39
ADDR_11
40
ADDR_9
41
ADDR_8
42
ADDR_7
43
ADDR_6
44
ADDR_5
45
ADDR_4
46
CKOUT_SDRAM
47
VDD33_IO
48
VSS_IO
49
CKIN_SDRAM
50
ADDR_3
51
ADDR_2
52
ADDR_1
53
ADDR_0
54
ADDR_10
55
ADDR_16
56
ADDR_15
57
NOT_CS_SDRAM
58
NOT_RAS
59
NOT_CAS
60
RD_NOTWR
61
NOT_BE0
62
VDD12_CORE
63
VSS
64
VDD33_IO
65
VSS_IO
66
NOT_CS_FLASH
67
ADDR_17
68
ADDR_18
69
ADDR_19
70
ADDR_14
71
VDD12_CORE
72
VSS
73
FLASH_D15
74
FLASH_D7
75
FLASH_D14
76
FLASH_D6
77
FLASH_D13
78
FLASH_D5
79
FLASH_D12
80
FLASH_D4
81
VSS_IO
82
VDD33_IO
83
FLASH_D11
84
FLASH_D3
85
FLASH_D10
86
FLASH_D2
87
FLASH_D9
88
FLASH_D1
89
FLASH_D8
90
FLASH_D0
91
VSS
92
VDD12_CORE
93
TMS
94
TCK
95
TDO
96
TDI
97
TRST
98
NRESET
99
VSS
100
VDD12_CORE
101
VCC12_PLL2
102
GND_PLL2
103
VCC12_PLL3
104
GND_PLL3
105
XTALIN
106
XTALOUT
107
VCC12_IO
108
GND_IO
109
CLKXTM
110
CLKXTP
111
VSS_PLL
112
VDD12_PLL
113
SHIELD_PLL
114
VSYNC
115
HSYNC
116
CLK_DATA
117
YCRCB0
118
YCRCB1
119
YCRCB2
120
YCRCB3
121
YCRCB4
122
YCRCB5
123
YCRCB6
124
YCRCB7
125
VDD12_CORE
126
VSS
127
PORTC3/POWER3
128
PORTC2/AV_CTL_C
129
PORTC1/SCL_ADE3800
130
PORTC0/SDA_ADE3800
131
PORTA0/NRESET_OUT
132
PORTD4/RC_IN
133
PORTA1/POWER_FAIL1
134
PORTD7/POWER_INFO
135
PORTA4/LED/FLASH_TXD
136
PORTA5/MUTE/FLASH_RXD
137
PORTA6/SEL
138
PORTA7/STATUS/FAN_CTL
139
VDD33_IO
140
VSS_IO
141
PORTB5/AGC
142
PORTB4/SC3_8
143
PORTB3/SC2_8
144
PORTB2/SC1_8
145
PORTB1/KEYBOARD
146
PORTB0/POWER_SW
147
PORTD5/POWER1
148
VCC33_ADC
149
GND_ADC
150
SHIELD_ADCDAC
151
REXT
152
GND_REXT
153
PB_B
154
PR_R
155
Y_G
156
GND_DAC
157
VCC33_DAC
158
V100
159
H100
160
CLK_DFL/PIP_CLK
1
PORTC7/SCL
IC801
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N2WL
IC801
IC BLOCK DIAGRAMS
Build-Up
YSI/CTI
Video
ST20 Core
H100
PR_R
Y_G
PB_B
SDRAM
SDIN
TNR
HV Filter
8
YCRCB[7:0]
CLK_DATA
Saturation
HSYNC
VSYNC
16/32
TV Peripherals
30
I/Os
Flash
Counter
NRESET
CLKXTM
Triple
Clock
Generator
2D
Block Move
OSD
Pipeline
Pipeline
Block
Time Base
Generator
TV Chassis Control
CSA
Picture
Comp.
Cursor
BG
Plane
Fast Blanking
EMI4
CLKXTP
Compositor
DAC
V100
CLK_DFL
27 MHz
Crystal
PIPIN
H/V Filter
8
YCRCB[7:0]
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N2WL
IC001 LA4919NE <Audio Output>
Multi-Standard
Demodulator
Diital
udio
Matri
oudeaerudioroein
eadoneudioroein
udioMatriin
udioroein
Demodulation
oerSulManaement
nutS
Sound
ututSart
eadone
Suooer
oudeaer
Monon
S
DiitalStereo
IC BLOCK DIAGRAMS
IC3451 STV8216T <NICAM & Stereo Sound Decoder>
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