Panasonic TC 20KL04 Diagram

Order DCS - AGO2004 - NNN - MS

Service Manual

GP3 CHASSIS

TC-20KL04A TC-20KL04P TC-29KL04A TC-29KL04P

Color Television

Specifications

TELEVISION

Power source

Consumption Antenna input jack Color systems Tuning system Channel capability

Picture tube Audio output Video input jack Video Outlet Dimension (W x H x D) Weight

TC-20KL04A

Automatic Switching 1 10/220V AC, 50/60Hz 74 W 75Ω - VHF/UHF/CATV PAL-M/NTSC/PAL-N F.S.T. 2 to 13 (VHF) 14 to 69 (UHF) 1 to125 (CATV) Panablack 48cm 3 W + 3W (RMS) 1AV (rear) 1 (rear) 600 x 473 x 487 mm 17,7 kg

TC-20KL04P

Automatic Switching 110/220V AC, 50/60Hz 74 W 75Ω - VHF/UHF/CATV PAL-M/NTSC/PAL-N F.S.T. 2 to 13 (VHF) 14 to 69 (UHF) 1 to125 (CATV) Panablack 48cm 3 W + 3W (RMS) 1AV (rear) 1 (rear) 600 x 473 x 487 mm 17,7 kg

TC-29KL04A

Automatic Switching 110/220V AC, 50/60Hz 115 W 75Ω - VHF/UHF/CATV PAL-M/NTSC/PAL-N F.S.T. 2 to 13 (VHF) 14 to 69 (UHF) 1 to125 (CATV) Panablack 74cm 5 W + 5W (RMS) 1AV (rear) 1 (rear) 760 x 579 x 512 mm 34,0 kg

TC-29KL04P

Automatic Switching 1 10/220V AC, 50/60Hz 115 W 75Ω - VHF/UHF/CATV PAL-M/NTSC/PAL-N F.S.T. 2 to 13 (VHF) 14 to 69 (UHF) 1 to125 (CATV) Panablack 74cm 5 W + 5W (RMS) 1AV (rear) 1 (rear) 760 x 579 x 512 mm 34,0 kg

Specifications are subject to change without notice. Weight and dimensions shown are approximate.

Remote Control Transmiter: TNQ2B2902

Power Source 3V (2 AA type batteries) Infrared Length 9500 Å (Angstron) Number of Buttons 29 keys Dimensions (W x H x D) (54 x 27 x 135) mm

Panasonic

Supplied Accessories:

• 1 Remote Control Transmitter

• 1 300Ω/75Ω Balum

• 2 “AA” (or R6) batteries (1.5V; ABNT/IEC)

TC-20KL04A / TC-20KL04P / TC-29KL04A / TC-29KL04P

Important Safety Notice

Special components are used in this television set which are important for safety. These parts are identified on the schematic diagram by the symbol . It is essential that these critical parts are replaced with the manufacturers specified replacement parts to prevent X-ray radiation, shock, fire or other hazards. Do not modify the original design without manufacturers permission.

Contents

OPERATING INSTRUCTIONS ................................................................ 4

IC601 - PINOUT ................................................................................... 5

IC VOLTAGE T ABLES .......................................................................... 6

IC601 - BLOCK DIAGRAM ................................................................... 7

GP3 CHASSI FEATURE SUMMAR Y ..................................................... 8

THE DAC CONTROL FUNCTIONS FOR THE GP3 CHASSIS ................... 9

SERVICE MODE:

HOW TO ENTER IN THE SERVICE MODE .............................................. 9

TO EXIT SERVICE MODE AND RETURN TO NORMAL MODE ................. 9

ADJUSTMENTS:

CHK1, CHK2, CHK3 and CHK4 ADJUSTMENTS OPTIONS ............... 9, 10

TEST AND MEASUREMENT EQUIPMENTS REQUIRED ......................... 11

1- VIF DETECTOR OUTPUT LEVEL CONFIRMA TION ......................... 12

3- BUZZING CONFIRMA TION (AUDIO CIRCUIT) ................................ 12

4- ANODE AND HEA TER VOLT AGE CONFIRMA TION ........................ 12

5- P AL COLOR OUTPUT LEVEL ADJUSTMENT ................................ 13

6- NTSC SUB-TINT CALIBRA TION ..................................................... 13

7- PROTECTION CIRCUIT (SHUTDOWN) OPERATION) ...................... 13

8- SUB-BRIGHTNESS AND SUB-CONTRAST CALIBRATION ............ 14

9- FOCUS CALIBRA TION ................................................................... 14

10- COLOR PURITY ADJUSTMENT ......................................................

11- WHITE QUALITY CALIBRATION .....................................................

12- CONVERGENCE CALIBRA TION ......................................................

14- CRT CUT OFF CALIBRATION ....................................................... 15

15- VERTICAL DEFLECTION CALIBRATION ........................................ 16

16- WITHE BALANCE CALIBRATION ................................................... 16

EEPROM MEMORY MAPS ................................................................... 17

SCHEMA TICS DIAGRAMS:

CRT PCB SCHEMA TIC DIAGRAM ........................................................ 19

MAIN PCB SCHEMATIC DIAGRAM ...................................................... 20

MAIN PCB LAYOUT ............................................................................ 21

SIGNAL WA VEFORMS ........................................................................ 22

EXPLODED VIEW ................................................................................. 26

PARTS LISTS:

REPLACEMENT MECHANICAL P ARTS LIST ........................................ 27

REPLACEMENT ELECTRICAL PA RTS LIST .......................................... 28

General Guidelines

An Isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks. It will also protect the Receiver from being damaged by accidental shorting that may occur during servicing. When servicing, observe the original lead dress, especially in the high voltage circuit. Replace all damaged parts (also parts that show signs of overheating.) Always Replace Protective Devices, such as fishpaper, isolation resistors and capacitors, and shields after servicing the Receiver. Use only manufacturers recommended rating for fuses, circuit breakers, etc. High potentials are present when this Receiver is operating. Operation of the Receiver without the rear cover introduces danger from electrical shock. Servicing should not be performed by anyone who is not thoroughly familiar with the necessary precautions when servicing highvoltage equipment. Extreme care should be practiced when Handling the Picture Tube. Rough handling may cause it to implode due to atmospheric pressure (14.7 lbs per sq. in). Do not sick or scratch the glass or subject it to any undue pressure. When handling, use safety goggles and heavy gloves for protection. Discharge the picture tube by shorting the anode to chassis ground (not to the cabinet or to other mounting hardware). When discharging, connect cold ground (i.e. dag ground lead) to the anode with a well insulated wire or use a grounding probe. Avoid prolonged exposure at close range to unshielded areas of the picture tube to prevent exposure to X-ray radiation. The Test Picture Tube used for servicing the chassis at the bench should incorporate safety glass and magnetic shielding. The safety glass provides shielding for the tube viewing area against X-ray radiation as well as implosion. The magnetic shield limits X-ray radiation around the bell of the picture tube in addition to restricting magnetic effects. When using a picture tube test jig for service, ensure that the jig is capable of handling 31kV without causing X-ray radiation. Before returning a serviced receiver to the owner, the service technician must thoroughly test the unit to ensure that is completely safe to operate. Do not use a line isolation transformer when testing.

Warning !

It is essential that these critical parts are replaced with the manufacturers specified replacement parts

to prevent X-ray radiation, shock, fire or other hazards.

- 2 -

TC-20KL04A / TC-20KL04P / TC-29KL04A / TC-29KL04P

ABOUT LEAD FREE SOLDER (PbF)

Note:

In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that contains lead. We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn), Silver, (Ag), and Copper, (Cu). This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair work we suggest using the same type of solder although, with some precautions, standard Pb solder can also be used.

Caution

• PbF solder has a melting point that is 50° ~ 70° F, (300° ~ 400°C) higher than Pb solder. Please use a soldering iron with temperature control and adjust it to 700° ± 20° F, (370° ± 10°C).In case of using high temperature soldering iron, please be careful not to heat too long.

• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100°F, (600°C).

• If you must use Pb solder on a PCB manufactured using PbF solder, remove as much of the original PbF solder as possible and be sure that any remaining is melted prior to applying the Pb solder.

• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the opposite side (See figure, below).

SUGGESTED PbF SOLDER

There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper, (Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufac turer’s specific instructions for the melting points of their products and any precautions for using their product with other materials. The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.

HOW TO RECOGNIZE THAT PB FREE SOLDER IS USED

P.C.Boards marked as “PbF” use Pb Free solder. (See the figure below.) Pb Free is not used the Power Supply Board of this unit. (Example : Digital Board)

L624 L625 L626

L660

L661

L658

L659

100

C694

L653

L655

L657

L654

L656

L642

R768

L605

RA602

PFUP1330YA PbF

R767

R769

L606

L604

Q609

IC605

2625

C666

L643

BAT600

R70

C738

51 50

C667

RA609

D602

C668

RA610

+3.3V/BAT

C672

J600

L620

L618

C717

C731

L619

R723

L621

L630

R708

C728

IC610

+24V

CN612

Q613

R736

F605

R613R610

R611

R737

Q620

D608

C726

D607

Marked

DIGITAL BOARD COMPONENT VIEW

- 3 -

TC-20KL04A / TC-20KL04P / TC-29KL04A / TC-29KL04P

OPERATING INSTRUCTIONS

- 4 -

TC-20KL04A / TC-20KL04P / TC-29KL04A / TC-29KL04P

IC601 - PINOUT

Symbol Pin Description

P3.1/ADC1 1 port 3.1 or ADC1 input P3.2/ADC2 2 port 3.2 or ADC2 input P3.3/ADC3 3 port 3.3 or ADC3 input VSSC/P 4 digital ground for m-Controller core and periphery P0.5 5 port 0.5 (8 mA current sinking capability for direct drive of LEDs) P0.6/CVBSTD 6 port 0.6 (8 mA current sinking capability for direct drive of LEDs) or Composite video input. A positive-going

1V (peak-to-peak) input is required VSSA 7 digital ground of TV-processor SECPLL 8 SECAM PLL decoupling VP2 9 2nd supply voltage TV-processor (+8V) DECDIG 10 supply voltage decoupling of digital circuit of TV-processor PH2LF 11 phase-2 filter PH1LF 12 phase-1 filter GND3 13 ground 3 for TV-processor DECBG 14 bandgap decoupling EWD 15 East-West drive output VDRB 16 vertical drive B output VDRA 17 vertical drive A output IFI N1 18 IF input 1 IFI N2 19 IF input 2 IREF 20 reference current input VSC 21 vertical sawtooth capacitor AGCOUT 22 tuner AGC output SIFIN1 23 SIF input 1 SIFIN2 24 SIF input 2 GND2 25 ground 2 for TV processor SNDPLL 26 narrow band PLL filter AVL/REF0/SNDIF (1) 27 Automatic Volume Levelling / subcarrier reference output / sound IF input AUDIO2 28 audio 2 input AUDIO3 29 audio 3 input HOUT 30 horizontal output FBISO 31 flyback input/sandcastle output DECSDEM 32 decoupling sound demodulator QSSO/AMOUT/ 33 QSS intercarrier output / AM output in stereo applications or deemphasis AUDEEM (1) (front-end audio out) / AM output in mono applications EHTO 34 EHT/overvoltage protection input PLLIF 35 IF-PLL loop filter SIFAGC 36 AGC sound IF INTCO 37 intercarrier output (from QSS or vision IF amplifier) IFVO/SVO (1) 38 IF video output / selected CVBS output VP1 39 main supply voltage TV processor CVBS1 40 internal CVBS input GND 41 ground for TV processor CVBS2 42 external CVBS2 input GND 43 ground for TV-processor CVBS3/Y 44 CVBS3/Y input C 45 chroma input WHSTR 46 white stretch capacitor CVBSO 47 CVBS output AUDOUT /AMOUT 48 audio output /AM audio output (volume controlled) SVM 49 scan velocity modulation output INSSW2 50 2nd RGB / YUV insertion input R2/VIN 51 2nd R input / V (R-Y) input / PR input G2/YIN 52 2nd G input / Y input B2/UIN 53 2nd B input / U (B-Y) input / PB input BCLIN 54 beam current limiter input BLKIN 55 black current input / V-guard input RO 56 Red output GO 57 Green output

- 5 -

TC-20KL04A / TC-20KL04P / TC-29KL04A / TC-29KL04P

IC601 - PINOUT

Symbol Pin Description

BO 58 Blue output VDDA 59 analog supply of Teletext decoder and digital supply of TV-processor (3.3 V) VP E 60 OTP Programming Voltage VDDC 61 digital supply to core (3.3 V) OSCGND 62 oscillator ground supply XTALIN 63 crystal oscillator input XTALOUT 64 crystal oscillator output RESET 65 reset VDDP 66 digital supply to periphery (+3.3 V) P1.0/INT1 67 port 1.0 or external interrupt 1 input P1.1/T0 68 port 1.1 or Counter/Timer 0 input P1.2/INT0 69 port 1.2 or external interrupt 0 input P1.3/T1 70 port 1.3 or Counter/Timer 1 input P1.6/SCL 71 port 1.6 or I2C-bus clock line P1.7/SDA 72 port 1.7 or I2C-bus data line P2.0/TPWM 73 port 2.0 or Tuning PWM output P2.1/PWM0 74 port 2.1 P2.2/PWM1 75 port 2.2 P2.3/PWM2 76 port 2.3 P2.4/PWM3 77 port 2.4 P2.5/PWM4 78 port 2.5 SYNC_FILTER 79 CVBS (i.e. P0.6/CVBS) Sync filter input: This pin should be connected to VSSA via a 100 nF capacitor. P3.0/ADC0 80 port 3.0 or ADC0 input

IC VOLTAGE TABLES

Pin Voltage

1 3,3 2 21.2mV 32 40 5 2,56 6 97.5mV 70 8 2,3 98 10 5 11 3,3 12 3,9 13 0 14 4 15 11.6mV 16 1,3 17 1,3 18 1,9 19 1,9 20 3,9 21 3,8 22 146.7mV 23 181.3mV 24 181.3mV 25 0 26 1,3 27 2,5 28 3,7 29 3,7 30 0,6 31 0,5 32 2,3 33 2,8 34 1,6 35 1,5 36 198mV 37 0,4 38 2,7 39 8 40 3,6

IC601

Pin Voltage

41 0 42 3,8 43 0 44 3,3 45 0 46 3,6 47 2,9 48 3,5 49 4,4 50 2,5 51 2,7 52 2,7 53 2,7 54 2 55 5,3 56 3 57 3 58 3 59 3,3 60 0 61 3,3 62 28.5mV 63 1,9 64 1,9 65 0 66 3,3 67 105mV 68 4,7 69 5 70 3,2 71 2,3 72 3 73 55.9mV 74 0 75 0 76 3,7 77 0 78 0 79 0 80 0

IC451

Pin Voltage

1 0,3V 2 15,6V 3 -14V 4 -15,6V 5 67mV 6 16,5V 7 0,3V

IC1103

Pin Voltage

1 7,3mV 2 7,3mV 3 7,3mV 4 7,3mV 5 3,8V 6 3,8V 7 0,2V 85V

IC801

Pin Voltage

1 183V 2 3 22,7V 4 22,3V 5 96mV 6 1,5V 7 0,52V

IC1201

Pin Voltage

15V 2 6,4mV 3 1,27V 4 3,3V 5 6,4mV 65V

IC851

Pin Voltage

1 10,5V 2 10,5V 3 6,5V 4 4,3mV 5 6,3V 68V 75V

IC2301

Pin Voltage

1 11,22V 2 0,26V 3 6,6mV 4 0,23V 5 0,2V 6 1,46V 7 6,6mV 8 0,25V 9 50mV

X101

Pin Voltage

1 0,25V 2 0,25V 3 1,9V 4 1,9V

IC802

Pin Voltage

1 141V 2 8,5V 3 -8,7mV

T801

Pin Voltage

(V2) 1 22,5mV (V1) 2 23mV (P2) 5 180V (PT) 7 170V (P1) 8 168V (S6) 11 0,5V (S1) 12 0,2V (S2) 15 0,7V (S3) 17 0,2V

TPA10 142V TPA11 11,2V

Pin Voltage

1 10,4V 25V 3 -3,9mV

All voltage measurements were made in POWER ON mode, with 127V 60Hz power source and Color Bars Video Pattern.

IC880

- 6 -

IC601 - BLOCK DIAGRAM

TC-20KL04A / TC-20KL04P / TC-29KL04A / TC-29KL04P

+3.3 V

PWMS(4X)

I/O PORTS (4x)

ADC IN (4x)

VST OUT

SDASCL

LED OUT (2x)

VPE

RESET

AUDOUT

AUDIO3

AUDIO2

1/10 PAGE

MEMORY

C-BUS

TRANSCEIVER

VST PWM-DAC

80C51 CPU

ENHANCED

I/O PORTS

DISPLAY

TELETEXT/OSD

TELETEXT

ACQUISITION

CVBS

ROM/RAM

ROGOBO

CONTR/BRIGHTN

OSD/TEXT INSERT

COR

SYNC

DELAY LINE

BASE-BAND

BLKIN

BCLIN

CCC

WHITE-P. ADJ.

BLUE STRETCH

TINT CONTROL

SATURATION

BLACK STRETCH

RGB/YUV INSERT

WHITE STRETCH

EW GEOMETRY

V-DRIVE +

GEOMETRY

G/Y B/U BL

R/V

(EWD)

EHTO

VMOUT

HOUT V-DRIVE

(AVL)

(SNDIF)

AUDEEM QSSO/AMOUT

AVL

SOUND PLL

DEEMPHASIS

AUDIO SWITCH

VOLUME CONTROL

AGC

QSS MIXER

QSS SOUND IF

AM DEMODULTOR

SIFIN

LUMA DELAY

REF

VISION IF

PLL DEMOD.

VIFIN

TUNERAGC

PEAKING

VMOUT

AGC/AFC

VIDEO AMP.

- 7 -

PAL/SECAM/NTSC

REF

VIDEO SWITCH

IFVO

TRAP

SOUND

DECODER

VIDEO IDENT.

VIDEO FILTERS

CVBS3/Y

CVBS2

CVBSO

LOOP

H-DRIVE

H-SHIFT

H-OSC. + PLL

H/V SYNC SEP.

+8V

TC-20KL04A / TC-20KL04P / TC-29KL04A / TC-29KL04P

CHASSIS GP3 FEATURE SUMMARY

CHASSIS : GP3 MODEL : TC-20KL04A, TC-20KL04P, TC-29KL04A, TC-29KL04P. SYSTEM : 3 systems (P AL-M/P AL-N/NTSC) (P AL-M 50hZ) POWER SOURCE : AC automatic power switching (1 10/220)V, 50/60Hz MEMORY : 125 positions TV TUNING RANGE : 181 channels (TV / CA TV) OSD LANGUAGE : Portuguese, Spanish and English AUDIO SYSTEM : Stereo VERTICAL MAGNETIC FIELD : -0.1 ±0.03 COLOR TEMPERATURE : (High Light) x= 0.275±0.01, y=0.284 ±0.01, Y=150 (nit))

(Low Light) x= 0.273±0.01, y=0.283 ±0.01, Y=7.0 (nit)

REFERENCE VOLTAGE

CONTENTS TEST POINT

+B VOLTAGE

Buzzing confirmation

PAL color output

NTSC color output

Anode (EHT) voltage

MODEL

TPA10

TPA8 TPA9

TPA21

A22-1 - A22-3

or A22-2 - A22-4

TPL2 TPL1 TPL1

CRT ANODE

ADJUSTMENT

POINTS

D C C

MEMORY DATA

DATA

20KL VOLTAGE

140 ± 1,5V

8 ±1V 5 ±1V

175 ±1V

0.5 Vp-p

2.45 ±0.1Vo-p

2.45 ±0.5Vo-p

1.2 ±0.5Vo-p

26.5 +0.7 (Kv)

26.5 -1.5 (kV)

29KL VOLTAGE

140 ± 1,5V

8 ±1V 5 ±1V

215 ±15V

0.5 Vp-p

2.45 ±0.1Vo-p

2.45 ±0.5Vo-p

1.2 ±0.5Vo-p

29.5 +0.7 (Kv)

29.5 -1.5 (kV)

TC-20KL04A TC-20KL04P TC-29KL04A TC-29KL04P

[A]=C4H, [B]=00H, [C]=00H, [D]=33H, [E]=02H, [F]=20H, [G]=00H, [H]=09H [A]=C4H, [B]=00H, [C]=00H, [D]=33H, [E]=02H, [F]=20H, [G]=00H, [H]=09H [A]=C4H, [B]=00H, [C]=00H, [D]=33H, [E]=02H, [F]=20H, [G]=00H, [H]=09H [A]=C4H, [B]=00H, [C]=00H, [D]=33H, [E]=02H, [F]=20H, [G]=00H, [H]=09H

- 8 -

TC-20KL04A / TC-20KL04P / TC-29KL04A / TC-29KL04P

THE DAC CONTROL FOR GP3 CHASSIS FUNCTIONS AND ADJUSTMENTS

HOW TO ENTER IN THE SERVICE MODE:

1- Set the “OFF TIMER” to 30 minutes. 2- Press simultaneously RECALL key on the remote control and VOL(-) button on the unit.

After a couple of seconds, the expression “CHK” should appear on the right superior side of the screen. (T o change the memory data, press MUTE and VOLUME(_) simultaneously while the OSD is still on CHK1 mode. Key “4” moves forward in the memory , and key “3” moves back in the memory

Note: T o alter from CHK1 mode to CHK2, CHK3 or CHK4 modes, press key “2” to move forward and the key “1” to

move back, as illustrated below.

NORMAL MODE

Turn Off

CHK1

OPTION CODE

SETTING

“2”

ADJUSTMENT

”

“

CHK2 CHK3

VCJ

SERVICE MODE

“2”“

PINCUSHION

ADJUSTMENT

”“

“

TO EXIT SERVICE MODE AND RETURN TO NORMAL MODE:

Press the “NORMAL” key on the remote control unit or turn off the TV.

CHK1 - OPTIONS

On CHK1 mode, it is possible to adjust the options below:

“4”

OPTION1 OPTION1 OPTION2 OPTION2 DIGITO MSB DIGITO LSB DIGITO MSB DIGITO LSB

OPTION3 DIGITO MSB

OPTION5 DIGITO MSB

OPTION7 DIGITO MSB

ááá

“3”

“4”

OPTION3

DIGITO LSB

“3”

“4”

OPTION5

DIGITO LSB

“3”

“4”

OPTION8

DIGITO LSB

“3”

“4”

“3”

“4”

OPTION4

DIGITO MSB

“3”

“4”

OPTION6

DIGITO MSB

“3”

“4”

OPTION1

DIGITO MSB

“3”

“4”

“3”

“4”

OPTION4

DIGITO LSB

“3”

“4”

OPTION6

DIGITO LSB

“3”

“4”

“3”

“4”

“3”

å ááá

Note:

To select an option, type “4” to move forward and “3” to move back. After having selected the desired option, adjust it by pressing the “VOL(_)” or “VOL(+)” keys. Press “0” to memorize the adjustment.

”

WHITE BALANCE

ADJUSTMENT

”

“2”

CHK4 CHK5

ADJUSTMENT

”

“

STEREO

CHK1 mode adjustments

On CHK1 mode it is possible to adjust the items of the table shown here.

Note:

T o select an item, type “4” to move forward and “3” to move back. After having selected the desired option, adjust it by pressing the “VOL(_)” or “VOL(+)” keys. Press “0” T o memorize the adjustment.

- 9 -

OPTION1 OPTION2 OPTION3 OPTION4 OPTION5 OPTION6 OPTION7 OPTION8

CHK1 mode table

Standard values

TC-20KL04A/P

00 00 00 33 00 20 00 01

TC-29KL04A

XX XX XX XX XX XX XX XX

TC-14A04A / TC-20A04A

ADJUSTMENTS

CHK2 mode adjustments

On CHK2 mode it is possible to adjust the items of the table shown here.

Note:

CHK3 mode adjustments

On CHK3 mode it is possible to adjust the items of the table shown here.

Note:

ITEM

RF AGC CONT COL S-COL TINT S-TINT BRT

CHK3 mode table

ITEM

V-SLOP V-SHIFT 50Hz V-SHIFT 60Hz V-AMP 50Hz V-AMP 60Hz H-SHIFT EW-WIDTH EW-PARA EW-UP COR EW-LOW COR EW-TRAPE H-PARA H-BOW S-CORR-50Hz S-CORR-60Hz V-ZOOM-50Hz V-ZOOM-60Hz OSD H-POS OSD V-POS-50Hz OSD V-POS-60H

CHK2 mode table

Standard values

TC-20KL04A/P

100

50 34 50 30 30

Standard values

TC-20KL04A/P

35 36

1 27 44 18 23 26 15 15 43 27 32 18 28 25 25

2 27 18

TC-29KL04A

22 XX XX 37 XX 32 XX

TC-20KL04A/P

1 17 23 31 23 26 15 15 43 27 32 26 25 25 25

3 25 21

CHK4 mode adjustments

On CHK4 mode it is possible to adjust the items of the table shown here.

Note:

CHK5 mode adjustments- STEREO ADJUSTMENTS

On CHK5 mode it is possible to adjust the items of the table shown here.

Note:

CHK4 mode table

ITEM

R-CUT G-CUT S-BRT SUB CONTRAST R-DRIVE G-DRIVE B-DRIVE RGB CONTRASTE

CHK5 mode table

ITEM

INPUT LEVEL LB SEPARA TION HB SEPARA TION

Standard values

TC-20KL04A/P

29 26 26 21 26 31 33

Standard values

TC-20KL04A/P

40 10 27

TC-20KL04A/P

33 25 25 21 27 31 35 11

TC-20KL04A/P

9 28

- 10 -

ADJUSTMENTS

TEST AND MEASUREMENT EQUIPMENTS

T o execute all these electrical adjustments, the following equipment are required:

• Dual-Trace Oscilloscope Voltage Range: 0.001 V to 50 V/Div. Frequency Range: DC to 50 MHz Probes: 10:1, 1:1

• NTSC Video Pattern Generator

• DVM (Digital V olt Meter)

• MTS/SAP Signal Generator

• (TV Multi-Channel Sound Modulator (U.S.A.))

• Plastic Tip Driver and Non-Metal Driver

• Isolation Transformer (V ariable)

• Degaussing Coil

• White Pattern Generator

• Audio Generator

TC-14A04A / TC-20A04A

- 11 -

TC-20KL04A / TC-20KL04P / TC-29KL04A / TC-29KL04P

ADJUSTMENTS

ITEM / PREPARATION PROCEDURE

1- RF AGC ADJUSTMENT

1. Supply a color bar pattern and adjust the RF input signal of 69 dB µV (75Ω opened channel 07 RF freq.: 175.25

MHz).

2. Connect the digital multimeter in TPA15.

2- VIF DETECTOR OUTPUT LEVEL

CONFIRMATION

3- BUZZING CONFIRMATION

(AUDIO CIRCUIT)

1. Connect the oscilloscope with a 7kHz filter between A22-

2 and A22-3 speakers terminals .

2. Adjust the sound to maximum.

3. Adjust AVL: OFF

ADJUSTMENT:

1. Select RF AGC on CHK2 service mode.

2. Adjust "RF AGC" by pressing VOL(+) or (-) until obtaining

2.2±0.1V in TPA15.

3. Increase the input level by +2 dB and confirm that the voltage decreases in TPA15.

CONFIRMATION:

1. Install the chassis in the VIF calibration JIG and tune in a

63 dBU colorbar pattern (75Ω opened).

2. Connect the oscilloscope in TPA31.

3. Confirm that the output video sign is 1.05 ± 0.15 Vp-p in

TPA 31.

CONFIRMATION:

1. Supply a colorbar signal with local frequency adjusted

and the AFC ON (Channel with sound bearer and without modulation).

2. Assure that the width in the buzzing waveform is smaller

than 500 m Vp-p.

4- ANODE AND HEATER VOLTAGE CONFIRMATION

1. Supply a crosshatch signal.

2. Adjust the current beam to zero. (0 beam).

3. Adjust “SCREEN VR” and “CONTRAST” to minimum. Nota:

(When using a high voltage meter resistive type, it is necessary to use an electrostatic meter type to verify the values)

smaller than 500 m Vp-p

CONFIRMATION

1. Connect a voltage meter between TPA10 and ground.

Confirm that the voltage +B is within a range of 140.5V±

1.5V

2. Connect a high frequency voltage meter (VRMS) among

the heater, and confirm that the voltage is as below:

20” PHILIPS A48EAK01X 6,15 ± 0,25 Vrms 20” SAMSUNG A48KRD89X 6,30 ± 0,24 Vrms 29” PHILIPS A68AJB82X 6,30 ± 0,24 Vrms

3. Connect the high voltage meter in the CRT anode pin,

and confirm that the high voltage is within [A] range.

CRT [A]

29” 30,5 ~ 27,6 20” 27,2 ~ 25,0

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