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

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.

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.

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.

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 .

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

N4FB

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.

N4FB

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-

N4FB

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.

N4FB

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

N4FB

+ 14 hidden pages