Sanyo CE21CM1F-C Service Manual

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Part No. SKSM0702 C5KEV JULY 2004

Colour Television Service Manual

Model CE21CM1F-C

Service Ref. No. CE21CM1F-C-00

PRODUCT CODE: 111360804 ORIGINAL VERSION: Chassis No. EB7-B

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

CE21CM1F-C

Contents

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

Block diagrams ..............................................................................................................................................3

Cabinet Disassembly......................................................................................................................................4

Adjustment and Repair Procedures............................................................................................................5~9

CPU Functions..............................................................................................................................................................................10~1 1

Component Locations ............................................................................................................................12~13

IC Block Diagrams..................................................................................................................................14~18

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

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

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

Electric Parts List....................................................................................................................................22~26

Please use Schematic Diagram SKP20446 with this Service Manual.

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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 B/G, I, D/K, L/L’ Colour system PAL/SECAM/NTSC4.43 (PAL/NTSC4.43/MTSC3.58 IN AV MODE) Receiving channel UHF: 21~69

VHF: E2-E12, F2-F10, R1-R12

CATV: X, Y, Z, S1-S41, B-Q 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 Sound output(Music) 5 x 2 Dimensions (WxHxD) 612 x 476 x 482mm Weight 21 Kg

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BLOCK DIAGRAM

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

1/5

8/10

SP902

SP901

SPEAKER

IC001

AUDIO-OUT

IC201

IF/VIDEO/CHROMA/DEF

IF-IN

X132

SIF-IN

A101

TUNER

SCL

SDA

Video-Out

SIF-OUT

K1002

SCART SC2

K1001

SCART SC1

575655

R/G/B-IN

SCL

SDA

121314

CRT

HEATER

150V

Q701

Q711

Q721

PICTURE

TUBE

H.V

FOCUS/SCREEN

T451 FLYBACK

Q431

Q432

H-OUTPUT

D.Y

V-OUT

H-OUT

IC501

V-OUTPUT

IC1201

AV-VIDEO-SW <LA7954>

IC1401

RGB-SW

BLK

181716

MUTE

IC801

CPU

IC3451

NICAM/

STEREO

RC-IN

A1901

RC RECEIVER

KEY-IN

KEY SW

SDA

SCL

SDA

SCL

IC803

MEMORY

PROTECT

POWER

D641

IC642

D647

5V-1

27V

IC643

Q661

Q651

Q682

Q685

25V

145V

Q641

Q686

D615

Q611

SW901

D603-D606

C607

Q613

Reg.

C-IN

Y-IN

Video/

Y-IN

Video/Y-Out

Video-IN

R/G/B-OUT

T611

CONVERTER

D637

D646

IC641

Q666

AERIAL

4 21

52/53 23/24

981 6 4

1/3/13

2/5/12

SCL

SDA

51/53

M-OUT

R/G/B-IN

11/7/15

7/11/15

C-IN

C-OUT

L461

L462

Q461

Q462

C BUS

CONTROL

EW-OUT

X131

Q645

MONO OUT



FRONT AV

K1101

VIDEO IN

Outline

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CABINET BACK DISASSEMBLY

1. Remove 6 screws(A) for 21”

2. Pull out the cabinet back.

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CABINET DISASSEMBLY

(A)

AV1

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OPTION SETTING

[After replacing the Memory IC (IC803)]

The memory IC, IC803, stores the option data and service adjustment data for the TV, therefore, when the memory IC is replaced, the following setting and “SERVICE ADJUSTMENT” on next page must be performed.

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 RECALL button.

Option Mode Mode Description & Note

ON-TIMER ON or OFF On-timer available, default “ON” SORT MODE SORTING or Tuning mode, default “SORTING”

TUNING P & P ON or OFF Plug & Play mode, default “ON” WEL. TEXT ON or OFF Display message when first set up, default “ON” COMB FILTER OFF or ON For factory use, default “OFF” BBE ON or OFF BBE sound mode, default “OFF” AUTO VOLUME ON or OFF Default “OFF” HEADPHONE ON or OFF Headphone control , default “OFF” COUNTRY UK, IRE TV system, default “UK”

BG/DK / I / LL’ WIDE ON or OFF Wide mode, default “ON” AV3 ON or OFF AV3 Control default “OFF” CS/A,B CS or A/B Function of “CS” remote control button

ON-TIMER ON SORT MODE SOR TING P&P ON WEL. TEXT ON COMB FILTER OFF BBE OFF AUTO V OLUME OFF HEADPHONE OFF COUNTRY BG / DK / I / L/L' WIDE OFF AV3 OFF CS / A/B CS

OPTION

ADJUST : EXIT : RECALL

OPTION MODE FOR CE21CM1F-C-00

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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 programmed by using “OPTION SETTING” on previous page and the following adjustments.

ADJUSTABLE SERVICE ADJUSTMENT

REGULAR

IMAGE

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. Press

the P▼ button to highlight the mode required (Regular, Image, others and TB12**). Then press the F/OK button to select the mode.

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-C P Vertical Position Adjustment (not used on 4:3 models) 2 P H-P P Horizontal Position Adjustment 3 P V-L P Vertical Linearity Adjustment 4 P VSC P Vertical S-Correction Adjustment 5 P V-A P Vertical Size Adjustment 6 P H-S P Horizontal Size Adjustment 7 P E-P P Pin Cushion Adjustment 8 P E-T P Trapezoid Distortion Adjustment 11 P ECT P Top Corner Correction Adjustment 12 P ECB P Bottom Corner Correction Adjustment 13 P HPA P Parallelogram Distortion Adjustment 14 P H-B P Horizontal Bow 15 P VPH P Vertical Phase Adjustment (4:3 Vertical Adjustment)

Item No. OSD Description

1 AGC AGC Adjustment 2 -- Cut-Off Drive Adjustment 3 GRY G-Drive Adjustment (white balance) 4 GRY B-Drive Adjustment (white balance) 5 CTR Contrast Adjustment (use factory setting)(for factory use) 6 -- Screen Adjustment mode 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.

The available adjustment items are as follows;

Image : This can be adjusted for picture images/shapes. Regular : This can be adjusted for the service adjustment. other : This is for factory setting. DO NOT ADJUST. TB1251 : This is for the factory setting. DO NOT ADJUST.

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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 the remote control, then press the P▼ button on the front panel of the TV set and then turn the Mains switch Off and On. The initialisation is now completed. 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 and readjust the service adjustments listed on page 6 and to re-tune all the channels.

REGULAR 1, AGC 38

Adjustment No. and Item name

Adjustment Data

IMAGE

1. P V-P 1F

Adjustment No. and Item name

Adjustment Data

REGULAR mode

IMAGE mode

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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 115 ±0.5V by using VR641.

1. Input and tune an RF signal which is UHF to the clearest station.

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

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

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

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

age to be 3.2Vdc.

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

4. 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.

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 40.

7. Change data value of each item by using

LEVEL + or

LEVEL - button to obtain the proper white balance.

GREY SCALE ADJUSTMENT

FOCUS ADJUSTMENT

AGC ADJUSTMENT

+ B VOLTAGE ADJUSTMENT

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