Sanyo CE21DN5-C Bedienungsanleitung

Part No. SKSM0379 C2KVV AUGUST 2000

Colour Television

Service Manual

Model CE21DN5-C

Service Ref. No. CE21DN5-C-00

PRODUCT CODE: 111351116

ORIGINAL VERSION: Chassis No. EB6-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

CE21DN5-C

Contents

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

Block diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3~5

Cabinet Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Adjustment and Repair Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7~11

CPU Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12~13

Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14~15

IC Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16~18

Pin description of semiconductors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Part Description and reading of schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Cabinet Parts List/TV Stand parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Electric Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22~29

-2-

C2KVV

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 BG/DK

Colour system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PAL/NTSC4.43 (PAL/NTSC4.43/MTSC3.58 IN AV MODE)

Receiving channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .UHF: #21~69

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .VHF: E2-E12

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .CATV: X, Y, Z, S1-S41

Aerial input impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75ohm

AV terminal

21 Pin SCART Terminal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .AV1:CENELEC standard with RGB

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .AV2:CENELEC standard with S-inputs

Front AV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AV3:RCA Terminal, Video and Audio (L/R)

Sound output(Music) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9W x 2

Dimensions (WxHxD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .612 x 476 x 482mm

Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 Kg

-3- C2KVV

BLOCK DIAGRAM

This is a diagram for all models and therefore differs slightly from the actual block diagram.

IC801

CPU

IC803

MEMORY

SCL

SDA

IC802

ROM

IC201

IF/VIDEO/

CHROMA/

DEF

Q242

Q243

Q244

Q701

Q711

Q721

VIDEO-OUT

CRT

Q121~Q133

TV-OUT

SIF-IN

C-OUT

Y-OUT

AV1

AV2

TV-IN SC-1

SC-2

MONTO

-OUT

X132

X131

VIF

SIF

T451

FBT

D.Y

PCC

CONTROL

Q432

Q431

H-OUT

EW-OUT

V-OUT IC501

SYNC-IN

BLK

I2C BUS

BLK

CVBS-IN

25 26

19 1 - 15

80 - 63

T431

PROTECT-IN

PC-IN POWER

Q141

A101

TUNER

Aerial

FOCUS

SCREEN

Refer also

to FIG.-2.

AV SELECTOR

NICAM DECODER

Outline

-4-

C2KVV

IC1201

AV-SELECTOR

1(V)

2(L)

4(R)

13(V)

14(L)

16(R)

7(V)

8(L)

9(Y)

10(R)

11(C)

41(V)

(V)34

MONITOR-OUT

Q1202

Q1203

Y-IN

C-IN

FRONT AV3

MONITOR-OUT

SC-1

(VIDEO/AUDIO-L/R)

SC-2

(VIDEO/Y/C/AUDIO-L/R)

SC-1

SC-2

K12J

FRONT-AV

K12H

L-OUT

R-OUT

IC3451

NICAM

STEREO

C-OUT

Y-OUT

SIF-IN

AUDIO L/R-OUT AUDIO-OUT

IC201

IF/VIDEO/

CHROMA

IC001

AUDIO-OUT

SDA/SCL

(VIDEO)

Y-OUT

C-OUT Q1205

Q1204/1207

I2C BUS

AV Selector

NICAM DECODER

IC801

CPU

25 26 28 40

1 - 7, 63 - 80

POWER

KEY-IN

RC-IN

MUTE

BLK-OUT

B-OUT

G-OUT

R-OUT

Q806 CVBS

POWER-FAIL

DETECT

SCL

SDA

IC803

MEMORY

I2C BUS

CONTROL

IC802

ROM

System Control

Fig.-2

Fig.-3

-5- C2KVV

IC201

IF/VIDEO/

DEFLECTION

V-Drive

H-Drive

Q431

IC501

V-Output<LA7846>

Q462

Deflection

Yoke

Horiz.

Coil

Vert.

Coil

T451

FlyBack Trans

CS SW

Screen Width Control

Pcc Control

Q461

D441

T431

Q431

H-Output

Drive Trans

L461/L462

EW-Out

Deflection Control

-6-

C2KVV

CABINET DISASSEMBLY

CABINET BACK DISASSEMBLY

1. Remove 7 screws(A).

2. Pull out the cabinet back.

PLACING THE CHASSIS TO SERVICE

POSITION

1. Pullout the chassis and put it to the rails on the

side cabinet.

2. Fix main board with hook on the top rail.

(A)

C2KVV

OPTION SETTING [After replacing the Memory IC (IC803)]

The memory IC, IC803, stores the option data of TV set and service adjustments data for each circuit, therefore,

when the memory IC is replaced, it should be performed following setting and “SERVICE ADJUSTMENT” on 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. Set the options as shown below.

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 RECALL button.

Option Mode Mode Description & Note

ON-TIMER ON or OFF On-timer available, default “ON”

SORT MODE AUTO TUNE/SORT Tuning mode, default “AUTO TUNING”

or AUTO TUNING

or ATS EURO PLUS

PLUG & PLAY ON or OFF Plug & Play mode, default “ON”

WELCOME TEXT ON or OFF Display message when first set up, default “OFF”

CODE TEST OFF or ON For factory use, default “OFF”

WSS ON or OFF Wide Screen Signaling available, default “ON”

WIDE ON or OFF Wide mode, default “ON”

OPTION 4 or 7 LANGUAGE Language option , default “4 LANGUAGE”

312/313 Mode ON or OFF Teletext mode, default “OFF”

AV3 OPTION ON or OFF Front AV disable, default “ON”

3D SURROUND ON or OFF 3D Surround available, default “ON”

SIF OPTION BG, I, L/L’ or BG or BG, DK Television system, Default “BG, I, L/L’ “

OPTION

ON-TIMER ON

SORT MODE AUTOTUNING

PLUG & PLAY ON

WELCOMETEXT OFF

CODETEST OFF

WSS ON

WIDE OFF

OPTION 4 LANGUAGE

312/313 Mode OFF

AV3 OPTION ON

3D SURROUND ON

SIF BG ONLY

ADJUST : EXIT : RECALL

-8-

C2KVV

SERVICE ADJUSTMENTS

[After replacing the Memory IC (IC803)]

The memory IC, IC803, stores the service adjustments data for each circuit, therefore, when the memory IC is

replaced, it should be performed “OPTION SETTING” on previous page and the following adjustments, refer to

further adjustment on page 10.

ADJUSTABLE SERVICE ADJUSTMENT

REGULAR

WIDE

To enter to the Service Mode

+ Press and hold the GREEN button on the remote control and then press the P▼button inside of the door. The

adjustment window will appear on the screen.

REGULAR

WIDE

OTHERS

TB1251

ADJUST

SELECT:

EXIT : RECALL

IMPORTANT NOTICE

Do not attempt to adjust service adjustments not listed on the above otherwise it may cause

loss of performance and product safety.

Item No. OSD Description

1 P V-P Vertical Centre Adjustment

2 P H-P Horizontal Centre Adjustment

5 P V-S Vertical Size Adjustment

6 P H-S Horizontal Size Adjustment

7 P PCC Pcc Adjustment

8 P TRP Trapezoid Distortion Adjustment

10 P CNR Corner Adjustment

Item No. OSD Description

1 AGC AGC Adjustment

2 CUT Cut-Off Drive Adjustment

3 GRY G-Drive Adjustment

4 GRY B-Drive Adjustment

7 HBP H-Blanking Phase Adjustment

8 OSD OSD Positioning Adjustment

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.

-9- C2KVV

To select the mode and service item and change data value

+ Highlight the desired adjustment mode by using the P▲or P▼button and then press the F/OK button.

+ 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.

Exit from the Service Mode

+ Press the RECALL button or turn off the TV set by using the Mains switch.

INITIALISATION OF MEMORY IC

To initialise the memory IC (IC803), press and hold the NORMAL button on te remote control and then press the P▲

button on the front panel of the TV set, and then turn the Mains switch Off and On. Now the initialisation is

completed.

When initialised the memory IC, all of the setting data (option data and service adjustment data) stored in the IC are

reset to the default value. So it is necessary to set the option settings and readjust the service adjustments listed on

left page.

REGULAR

1, AGC 38

Adjustment No.

and Item name Adjustment Data

WIDE

1. PV-P 1F

Adjustment No.

and Item name Adjustment Data

REGULAR mode WIDE mode

-10-

C2KVV

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. Receive white raster pattern.

2. Set controls to normal.

3. Connect digital voltmetre to test point TP-B and GND.

4. Adjust voltage to 130 ±0.5V by using VR641.

1. Connect digital voltmetre to test point TP-A and GND.

2. Using the CS button, input and tune an RF signal

which is UHF to the clearest station.

4. Press the LEVEL+ or LEVEL - button to adjust volt-

age to be 3.2Vdc.

5. Enter to the service mode and select mode “REGU-

LAR”, and select item no.1 “REGULAR 1, AGC”.

By using FOCUS VR, adjust focus control for well

defined scanning lines.

SCREEN ADJUSTMENT

1. Receive black & white pattern.

2. Enter to the service mode and select mode “REGU-

LAR”, and select item no. 2 “REGULAR 2, CUT”. The

horizontal line will appear on the screen.

3. Using the numeric buttons shown set each colour to

minimum by decreasing to the point where any further

decrease resets the adjustment to maximum value.

4. Set the SCREEN VR for one colour to be just visible.

BIAS ADJUSTMENT

5. By using the buttons 1, 2, 4, 5, 7, 8 on the remote

control, adjust the line to be white.

The key allocation is as follows;

Button No. Operation

1 Increase Red

2 Decrease Red

4 Increase Green

5 Decrease Green

7 Increase Blue

8 Decrease Blue

DRIVE ADJUSTMENT

6. Select item no.3 “REGULAR 3, GRY” (G-Drive) or 4

“REGULAR 4, GRY” (B-Drive) and adjust both initially

to 3F.

7. Change data value of each item by using LEVEL + or

LEVEL - button to obtain the proper white balance.

PCC ADJUSTMENT

1. Receive cross hatch pattern and set screen mode to

“FULL”.

2. Enter to the service mode and select mode “WIDE”,

and select item no. 7 “WIDE 7.P PCC”.

3. Press the LEVEL+ or LEVEL - button to adjust the

vertical line to be straight.

TRAPEZOID ADJUSTMENT

1. Receive cross hatch pattern and set screen mode to

“FULL”.

2. Enter to the service mode and select mode “WIDE”,

and select item no. 8 “WIDE 8.P TRP”.

3. Press the LEVEL+ or LEVEL - button to correct the

trapezum distortion of the vertical line.

PCC ADJUSTMENT

GREY SCALE ADJUSTMENT

FOCUS ADJUSTMENT

AGC ADJUSTMENT

+ B VOLTAGE ADJUSTMENT

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