Sanyo CE15LM5, CE20LM5 Schematic

Part No. 1KA6P2P0068-- N4FB AUG 2008

Colour Monitor
Service Manual

Model CE20LM5

Service Ref. No. CE20LM5-00

PRODUCT CODE: 113002801

ORIGINAL VERSION:

Chassis No.UK6-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

CE20LM5

Contents

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

Service menu access......................................................................................................................................3

Hotel and Option Menus ................................................................................................................................4

Others Menu and ADC calibration..................................................................................................................5

Colour Temperature adjustment and Picture Mode setting ............................................................................6

Teletext brightness and Factory reset ......................................................................................................................................7

Options and settings ......................................................................................................................................8

Signal block diagram ....................................................................................................................................10

Power Flow diagram ....................................................................................................................................11

Cabinet Parts List ........................................................................................................................................12

Cabinet Disassembly ....................................................................................................................................13

Pin description of semiconductors ................................................................................................................14

Part description and reading of schematic diagram ....................................................................................15

Electrical Parts List ................................................................................................................................16, 17

Schematic Diagram is included in this Service

Manual.

SM5111106-00



2

SAFETY PRECAUTION

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 LCD panel.

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 monitors 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

SCART: CENELEC standard
INPUT: Composite video, RGB and Audio L/R

OUTPUT: TV-output with composite video and audio L/R
Sound output(Music) N/A
Contrast ratio 600:1
Display resolution 640 x 480 (VGA)
Dimensions (WxHxD) 486 x 383 x 83 mm
Weight 5.2 Kg

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!

!

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 seprately.

RoHS

!

.This product does not contain any hazardous substances prohibited by the RoHS Directive.

(You will find “R” or “Z” at the last digit of the serial number or an “RSF” label near the rating plate on
the RoHS compliant product.)

WARNING

!

.You are requested to use RoHS compliant parts for maintenance or repair.
.You are requested to use lead-free solder .

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

Service Menu

Procedure for accessing the service menu:

MENU, 3, 6, 0, 9

Factory Menu

Source SCART shows the current input mode

ADC ADJ to access the ADC auto calibration menu

Picture Mode to access the picture preset adjustment menu

Colour Temp to access the white balance adjustment menu

TTX Brightness to access the text brightness preset level adjustment menu

Other to access other availible adjustment options

Model B/S to select the model characteristics (betting shop or CCTV)

Factory Reset to perform a memory reset to restore default values

Version : 1.01 indicates the current software version loaded

05 / 07 / 08 indicates the issue date of the software version

Model Option:

B/S (Betting shop) For models fitted with SCART & TUNER

CCTV (Closed circuit TV) For models fitted with BNC in & out

Also some menu's & options will not be accessible in the CCTV mode.

Use P+ / P- on the remote to highlight the desired item, then use Vol + to enter or change the item.

With the set turned ON, press the following sequence of buttons on the remote control:-

The main service menu will be displayed on screen.

Changing the model option will automatically alter some of the settings to suit

the requirements of the application.

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4

Hotel Menu

Hotel

Hotel Mode Off Turn ON to disable RF channel tuning facility

Volume Max 100 set value between 0 and 100 to limit the sound output availible from speaker

On Program SCART set the desired input or channel that will appear at switch on

Use P+ / P- to select item and Vol+ / Vol- to change data.

To enter the Hotel Menu press & hold the GREEN button on the remote for about 5 seconds,

the Hotel menu will appear at the bottom of the screen.

Hotel mode allows the owner to restrict the functionality of the set so that the user may not tamper

Volume max' allows the owner to set a limit to the maximum sound output to prevent noise disturbance.

with settings such as channel tuning.

Option Menu

This menu is used to enable or disable certain functions availible in the bios.

To enter the Option menu press and hold the GREEN button on the remote for about 5 secs, first the

HOTEL menu will appear. Now press and hold GREEN for a further 5 secs, now the OPTION menu

will appear. Only the highlighted items may be accessed by the user.

Tuner option On Allows RF tuning. (not availible in CCTV mode)

Sound option Off Allows sound output to loudspeaker (if fitted)

SCART option On Allows inputs by SCART connector (not availible in CCTV mode)

BNC option Off Allows inputs by BNC connector (not availible in B/S mode)

PC option Off Allows VGA input from PC (if VGA connector fitted)

Auto shut off AV On Enables Auto shut off operation in AV mode

RGB option On Allows RGB input from SIS network via SCART (B/S model only)

Text no signal On Prevents loss of Text stability with no signal

Blue back Off Enables Blue Background operation during no signal condition.

to change the state.

Use P+ / P- on the remote to highlight the desired item, then use Vol+ / Vol-

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5

Other Menu

SCART Brightness 164

Black Stretch 100

OSD Transparency Off

Gamma 2.3

TTX H Position 90

TTX V Position 0

Peaking Level : RF 18

Peaking Level : Scart 16

Peaking Level : Svideo 16

Peaking Level :RGB 18

Peaking Level : AV 16

Use P+ / P- to select item & Vol+ / Vol- to change value.

Can be used to equalise the picture peaking in SCART mode

Can be used to equalise the picture peaking in SVIDEO mode

Can be used to equalise the picture peaking in RGB mode

Can be used to equalise the picture peaking in AV mode

Allows the Gamma curve to be altered if required

Can be used to centralise the Teletext horizontally

Can be used to centralise the Teletext vertically

Can be used to equalise the picture peaking in RF mode

This menu contains some items that should not normally require adjustment.

Controls brightness of composite video inputs independantly to RGB

Used to overcome the problem of crushed dark shades

Allows the OSD to become partially or fully transparent

ADC Calibration

A test signal of RGB colour bars must be applied to the SCART input for this adjustment to be

Source SCART

R-Offset 127 It is not possible to manually adjust these values

G-Offset 127

B-Offset 127

R-Gain 127

G-Gain 127

B-Gain 127

AutoTune

Press Vol + to begin auto Calibration

The ADC ADJ menu is accessible from the main service menu.

performed. If the result is successful, OK will be displayed at the bottom of the OSD.

ADC calibration is performed automatically by pressing Vol + key whilst the ADC menu is displayed.

This adjustment is not required for the CCTV model.

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6

Colour Temperature

Source SCART

Colour Temp Normal

R-Gain 128

G-Gain 128

B-Gain 128

R-Offset 128

G-Offset 128

B-Offset 128

Method

Use P+ / P- to select item and Vol+ / Vol- to change value.

If the Grey scale suffers from a predominant tint use the R, G, B Offset adjustment to neutralise,

in this case the white level adjustment should be re-checked.

the pictures' white balance.

If a suitable colour analyser is availible adjust the co-ordinates to X= 0.290, Y= 0.290 (+/- 0.01)

Keeping one colour constant, adjust R, G, B Gain value to achieve a pure white image.

Connect a 100% white test signal to either SCART or Aerial input and set picture mode to STANDARD

Enter the service mode & select Colour Temperature option.

Red adjustment (grey scale)

Green adjustment (grey scale)

Blue adjustment (grey scale)

The Colour Temperature menu is accessible from the main service menu and is used to adjust

Red adjustment (white level)

Green adjustment (white level)

Blue adjustment (white level)

Picture Mode

as required.

Source SCART

PIC Mode Standard

Contrast 42

Brightness 48

Colour 45

Sharpness 25

The predetermined settings for the fixed picture modes can be adjusted using this Menu.

Select the PIC Mode desired to be changed using P+ / P- and Vol+ / Vol- change the value

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7

Text Brightness

MAX 63

MID 42

MIN 21

The three predetermined levels set for Teletext brightness control can be adjusted in this menu.

Use P+ / P- to select item & Vol+ / Vol- to change value.

Factory Reset

In certain circumstances it might be useful to restore the memory to the default conditions
preset within the system bios.
To do this enter the main factory menu and select the "Factory Reset" option.
Press vol+ to proceed with the initialisation.

This reset does not affect the ADC calibration or the White balance adjustment settings,
nor does it clear the stored RF channels.

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8

OPTIONS & SETTINGS

The table below shows the correct factory settings for this model.
Some of these items may need to be restored if a ‘Factory Reset’ is performed.

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PIC MODE CONTROL N4FB

Standard

Contrast

42

Brightness

48

Colour

45

Sharpness

25

Movie

Contrast

36

Brightness

48

Colour

54

Sharpness

22

Vivid

Contrast

52

Brightness

48

Colour

55

Sharpness

48

User

Contrast

50

Brightness

48

Colour

50

Sharpness

49

Picture

Picture mode Standard

TXT Brightness

mid

Sound

Volume

N/A

Advance

Child Lock

Off

3D NR

Off

Colour System

Auto

TTX Language

West

OSD Setup

Language

English

Time out

15

TV Setup

Colour system

Auto

Sound system

I

AFT

On

9

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OPTIONS & SETTINGS continued

Factory

Model B/S

Hotel

Hotel Mode Off
Volume max 100

On Program SCART

Options

Tuner option On

Sound option

Off

SCART option On

BNC option Off

PC option Off

Auto shut off AV On

RGB option On

Text no signal On

Blue Back Off

TTX Bright

Max 63

Mid 42

Min 21

Other

SCART Brightness 164
Black Stretch

100

OSD Transparency Off

Gamma 2.3

TTX H Position 90

TTX V Position 0

Peaking Level RF 18

Peaking Level Scart 16

Peaking Level Svideo 16

Peaking Level RGB 18

Peaking Level AV 16

10

SIGNAL BLOCK DIAGRAM

N4FB

Speaker

Audio

MP7720

Amplifier

U5

Power Module

/Inverter

Backlight

LCD

panel

TTL /LVDS

U10

Video signal

RS232

Audio signal

Control signal

Input unit

process unit

Output unit

Icon explaining

U12

SDRAM

ROM

U11

sh
a

Fl

PC/Video Audio input

RS232

U3

DDC EEPROM

SCART Audio input

SCART Audio output

Tuner Audio input

2-Wire Bus

EEPROM

Loop

U9

MST96885CLD

input

CVBS input

PC Video input

SCAR-CVBS input

Tuner Video input

SCART-S-VIDEO

SCART-RGB/SIS input

Video Switch

CVBS input

U1

SIS CVBS input

Hotel-IR

GPIO

GPIO

ADC+

&LED

IR Sensor

User

Keypad

ISP

CN11

PC (VGA)

CN3

Audio in

CN4

Tuner TU1

CN1

BNC in/out

CN2

SCART

POWER FLOW DIAGRAM

11

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VS_TUNER

TUNER,

L1

U1,U2,

U6

VS_IF

L2

U2,U6

U20

VDD

FB25

MVDD_SW

SDRAM

U12

VDDQ

MST

96885

U

VDDM

FB26

FB23

D_A
VD

AVDD_SIF

A

AVDD_MEMPLL

PANEL VDD

FB17

+3V3A_SW

FB19

FB18

VDDC

AVDDA

VDDP

AVDD_MPLL

TCON_+3V3 15” LCD

PANEL VDD

U16

+8VA +5VA -5VA

U17 U18

+5V_SW

Q29

+5V

Q30

er
rt
e

U14,

Q28

VIN_+12V

15” Inv

42

FB27,

FB

+12V_IN

6

PIN1,2

PIN5,

PWRIN

E
S
U
F

U19

FB21

1V2
+

1
2

U

FB20

+3V3

U15

FB24

FB22

,
H

IG
H
_
L

PUL

U4

MP

11
U

1
Q1

HIGH,
_
L
L

PU

U9,U3

A

MP7720

AUDIO

12V
_

MP_
A

Q19

TCON_5V 20” LCD

L

_PANE
V

+5

FB28 Q38 FB7

+5V_IN

DC JACK

CN13

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CABINET PARTS LIST FOR MODEL CE20LM5

1

3

5

CE20LM5

CABINET PARTS

610 338 9479 CABINET FRONT-N4FK
665 001 3476 DEC SHEET
610 338 8731 CABINET BACK N4FK
665 001 2646 DEC SHEET

3 665 000 6638 STAND BASE-N4EJ
4 610 338 8748 CHASSIS BASE N4FJ
5 610 329 2069 HOLDER PANEL N4EJ

ACCESSORIES

6 665 001 4343 QUICK GUIDE N4FB

SCREWS

BACK COVER 411 194 0101 x 4
STAND BASE 411 194 0101 x 2

2

Item Part No. Description Item Part No. Description

4

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1

2

{
{

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A

A

A

A

CABINET DISASSEMBLY

Remove the 4 screws indicated (A)
then lift away the back cover.

-14-

PIN DESCRIPTION OF SEMICONDUCTORS

G Diode

G Transistor/FET

G IC

FET

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● Diode

K

A

● Transistor/FET

E

C

B

C

E

E

B

C

● IC

K

A

K

A

K

K

K: Cathode
A: Anode

AA

C

E

C

E

B

B

C

B

B1

C1

CBE

C2

B2

E

C

BE

B1

C1



C2

2

B1 B2

E

Vdd

KK

C1

C2

E

B2

C2

E2 C1

B1

B2

A

B1

E1

B2



(GND)

2

Index

E1

C1
C2

E2

A

C: Collector
B: Base
E: Emitter

G

S

D

3

D: Drain
G: Gate
S: Source

S

G

D

1

3

2

Index

Index

N

1

Index

1

3

2

Index

Index

1

3

N

GND

Index

(IN)

N

3

1

(OUT)

4

5

6

21

5

4

3

2

1

Index

1

RESET

1

2

N

1

2

1

2

1

3

1

N

N

Index

Index

N

1

N

1

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PARTS DESCRIPTION AND READING IN SCHEMATIC DIAGRAM

1. The parts specification of resistors, capacitors and
coils are expressed in designated code. Please
check the parts description by the following code
table.

2. Some of transistors and diodes are indicated in
mark for the substitution of parts name. Please
check the parts name by the following code table.

3. Voltages and waveforms were taken with a video
colour bar signal(1Vp-p at 75 ohms terminated) and
controls to normal.

4. Voltages were taken with a high-impedance digital
voltmetre.

Example 2000 K

K 1000 BG

Characteristic

Example 160 E M 10

Capacitance value

Tolerance
Type
Rated voltage

Excepting electric capacitors, all
capacitance values of less than 1
are expressed in μF and more
than 1 are in pF.

Example L2 C1 4R7 K N

Tolerance
Inductance value
Manufacture code
Unique code

Mark Material

E Electrolytic
P Electrolytic (non-Polarised)
C Ceramic (temperature compensation)
K Ceramic
F Polyester
N Polypropylene

M Metalised polypropylene

H Metalised polypromylar
B Ceramic (semiconductor)

G Metalised polyester

Y Composite film
S Styrol
T Tantalum oxide solid electrolytic
U Organic semiconductive electrolyte
D Electric double layer electrolytic

Mark Tolerance

A not specified

B ±0.1
C ±0.25
D ±0.5

F±1
G±2

E ±2.5
H±3

J±5

K±0
M±20
N±30

P +100 -0
Q +30 -10

T +50 -10
U +75 -10

V +20 -10

W +100 -10

X +40 -20

Y +150 -10

Z +80 -20

Mark Tolerance (nH) Mark Tolerance (%)

C ±0.25 G ±2
D ±0.5 J ±5
S ±0.3 K ±10
A ±0.2 L ±15

M±20

Coil Reading

Capacitor Reading

Example 1/2

D J 10K B

Example 6 W K 8.2

Example 1/2 C K 1M

Resistor Reading

Characteristic

Z (Carbon fuse)
B (Non-burnable)

Resistance value
Tolerance (see below table)
Material (see below table)
Rated wattage (W)

K indicates in KΩ
M indicate in MΩ

Note: Resistor which is indicated with resistance value only are

1/6W carbon resistor. Resistor which is indicated with materi­al, tolerance and value are 1/4W rated wattage.

Mark Material

D Carbon
N Metal film
S Oxide metal film
C Solid
G Metal glaze

W Wire wounding or cement

H Ceramic
F Fusible

Mark Tolerance

A ±0.05
B ±0.1
C ±0.25
D ±0.5
F±1
G±2
J±5
K±10
M±20
P+5-15
Z used in 0 ohm

G Material table

G Tolerance table

G Material table

G Tolerance table

Mark Type number

-- 1S1555,1S2473,1S2076,1SS133,DS442,1SS176
K 1S1555,1S2473,1S2076,DS442

L 1S1555,1S2076A,1S2471
M 1SS133,1SS176,GMA01
N 1S1555,1S2473,1S2076,1SS133,DS442,1SS176,1N4148
P 1S1555,1S2076A,1S2471,1N4148
R 1S1555,1S2076,1S2473,DS442,1N4148

AA 1S1555,1S2076,1S2473,1SS133,DS442,1SS176,1N4148,GMA01

G Diode

Mark Type number

-- 2SC536 2SC945A 2SC1815 2SC1740 2SC1740S KSC945C
A E, F, G P, Q, R O, Y, G Q, R, S Q, R, S
B E, F, G P, Q, R O, Y, G Q, R, S
D F, G P, Q Y, G Q, R, S

FF, G P G R, S
H F, G P, Q Y, G Q, R, S Y, G

I E, F, G P, Q, R O, Y, G Q, R, S Y, G
GF, G P G R, S G

AD F, G Q, R Y, GR Q, R, S
AE E, F, G Q, R O, Y, GR Q, R, S

G Transistor (NPN type)

Mark Type number

-- 2SA608 2SA564A 2SA1015 2SA933 2SA933S KSA733C
Y E, F Q, R O, Y, G Q, R
WF R Y, G R
V E, F Q, R O, Y, G Q, R Y, G
UF R Y, GR G

Z E, F Q, R O, Y, G Q, R Q, R

AB F R Y Q, R
AE E, F Q, R O, Y R

G Transistor (PNP type)

Diode/Transistor Type Reading

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CHASSIS ELECTRICAL PARTS LIST

Product safety should be considered when a component replacement is made in any area of a receiver.
Components indicated by a mark in this parts list and the circuit diagram show components whose value have
special significance to product safety. It is particularly recommended that only parts specified on the following
parts list be used for components replacement pointed out by the mark .

Read description in the Capacitor and Resistor as follows:

CAPACITOR
CERAMIC 100P K 50V

Tolerance Symbols:
Less than 10PF
A: Not specified B: ±0.1PF C: ±0.25PF
D: ±0.5PF F: ±1PF G:±2PF
R: ±0.25-0PF S: ±0-0.25PF E: +0-1PF
More than 10PF
A: Not specified B: ±0.1% C: ±0.25%
D: ±0.5% F: ±1% G:±2%
H: ±3% J: ±5% K: ±10%
L: ±15% M: ±20% N: ±30%
P: +100-0% Q: +30-10% T: +50-10%
U: +75-10% V: +20-10% W:+100-10%
X: +40-20% Y: +150-10% Z: +80-20%

Material:

CERAMIC ............Ceramic

MT-PAPER ..........Metallized Paper

POLYESTER ......Polyester

MT-POLYEST ......Metallized Polyester

POLYPRO............Polypropylene

MT-POLYPRO ....Metallized Polypropylene

COMPO FILM......Composite film

MT-COMPO ........Metallized Composite

STYRENE............Styrene

TA-SOLID ............Tantalum Solid

AL-SOLID ............Aluminium Solid

ELECT ................Electrolytic

NP-ELECT ..........Non-polarised Electrolytic

OS-SOLID ..........Aluminium Solid with Organic Semiconductive Electrolytic

DL-ELECT ..........Double Layered Electrolytic

RESISTOR
CARBON 4.7K J A 1/4W

Rated Wattage

Performance Symbols:
A: General B: Non flammable Z: Low noise
Other: Temperature coefficient

Tolerance Symbols:
A: ±0.05% B: ±0.1% C: ±0.25% D: ±0.5%
F: ±1% G: ±2% J: ±5% K: ±10%
M: ±20% P: +5-15%

Rated value, ohms:
K: 1,000, M: 1,000,000

Material:

CARBON ............Carbon

MT-FILM ..............Metal Film

OXIDE-MT ..........Oxide Metal Film

SOLID ..................Composition

MT-GLAZE ..........Metal Glaze

WIRE WOUND ....Wire Wound

CERAMIC RES....Ceramic

FUSIBLE RES ....Fusible

Rated Voltage

Rated value: P=pico farad, U=Micro farad

Note: Parts order must contain Service Ref. No., Part No., and descriptions.

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!

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Main assembly part number 1AA0B10H089B0
Main unit kit part 1AV4U20C29201
RC / LED unit 1AV4U20C29202

Ref. No. Part No. Part description

CN10-A 645 033 2227 CORE, FERRITE

CN2 652 001 4978 SKT,RGB 21P (MRC-021V-13)

CN6-A 645 032 9364 CORE,FERRITE

CN6-PN 645 078 2381 FLEXI FLAT CABLE 120MM

EL901 645 090 0662 LCD(V201V1-T04)REV C2 CMO

TU1 665 001 3414 TUNER,U/V

U902 645 075 9673 UNIT,INVERTER-POWER

U902-A 610 315 1359 GASKET C-N2HE 80X13X13

W901 665 000 6911 3P AC CORD +4771 F7RAV

W901-A 665 001 2417 CWA4781 +JST 2P F7RAV

W901-B 645 020 3640 FERRITE RING

Z202 610 322 7313 SHIELD CASE CPU-B-N3AJ

Z202-A 610 315 1359 GASKET C-N2HE 80X13X13

The above parts are fitted locally and therefore availible as spares.

All other board mounted parts are not fitted locally and therefore cannot be sourced for spares.

Please order the complete assembly for repairs.

Electrical Parts

CHASSIS ELECTRICAL PARTS LIST

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Sanyo Industries (UK) Ltd

Printed in UK