Panasonic TC-14A04A User manual

Service Manual
Order DCS - JUN2004 - 003 - MS
Color Television
GP3 CHASSIS
TC-14A04A
TC-20A04A
Panasonic
®© 2004 Panasonic da Amazônia S/A.
CS Division
Technical Support
Supplied Accessories:
• 1 Remote Control Transmitter
• 1 300Ω/75ΩBalum
• 2 “AA” (or R6) batteries (1.5V; ABNT/IEC)
• 1 Internal antenna (for TC-14A04A only)
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
TELEVISION
Power source
Consumption
Antenna input jack
Color systems
Tuning system
Channel capability
Picture tube (Diagonal Visual)
Audio output
Video input jack
Video Outlet
Dimension (width, height, depth)
Weight
TC-14A04A
110/220 V AC, 50/60 Hz automatic switch
51 W
75 ohms - VHF/UHF/CATV
PAL-M/NTSC/PAL-N
F.S.T.
2 to 13 (VHF)
14 to 69 (UHF)
1 to125 (CATV)
Panablack 33 cm
3 W RMS
1 AV (back)
1 (back)
370 x 351 x 366 mm
9,6 kg
Specifications
TC-20A04A
110/220 V AC, 50/60 Hz automatic switch
61 W
75 ohms - 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 RMS
1AV (back)
1 (back)
502 x 455 x 471 mm
17 kg

TC-14A04A / TC-20A04A
- 2 -
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 shoc s. 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
brea ers, etc.
High potentials are present when this Receiver is operating. Operation
of the Receiver without the rear cover introduces danger from electrical
shoc . Servicing should not be performed by anyone who is not
thoroughly familiar with the necessary precautions when servicing high-
voltage 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 sic 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 31 V 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.
I portant 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, shoc , fire or other hazards. Do not modify the original design without manufacturers permission.
Warning !
It is essential that these critical parts are replaced
with the manufacturers specified replacement parts
to prevent X-ray radiation, shoc , fire or other haz-
ards.
Contents
OPERATING INSTRUCTIONS................................................................ 4
IC601 - PINOUT ................................................................................... 5
IC VOLTAGE TABLES .......................................................................... 6
IC601 - BLOCK DIAGRAM ................................................................... 7
GP3 CHASSI FEATURE SUMMARY ..................................................... 8
THEDACCONTROLFUNCTIONSFORTHEGP3CHASSIS................... 9
SERVICEMODE:
HOWTO ENTER IN THE SERVICEMODE.................................................9
TOEXITSERVICEMODEANDRETURNTONORMALMODE...................9
ADJUSTMENTS:
CHK1,CHK2,CHK3andCHK4ADJUSTMENTS OPTIONS ............... 9, 10
1- VIFDETECTOROUTPUT LEVEL CONFIRMATION......................... 11
3- BUZZINGCONFIRMATION (AUDIO CIRCUIT) ................................11
4- ANODEANDHEATERVOLTAGE CONFIRMATION ........................ 11
5- PAL COLOR OUTPUTLEVEL ADJUSTMENT ................................12
6- NTSCSUB-TINTCALIBRATION..................................................... 12
7- PROTECTIONCIRCUIT(SHUTDOWN)OPERATION)...................... 12
8- SUB-BRIGHTNESSANDSUB-CONTRASTCALIBRATION.............13
9- FOCUSCALIBRATION ................................................................... 13
10- COLOR PURITY ADJUSTMENT ...................................................... 13
11- WHITEQUALITYCALIBRATION..................................................... 14
12- CONVERGENCECALIBRATION......................................................14
14- CRT CUT OFF CALIBRATION ....................................................... 14
15- VERTICALDEFLECTIONCALIBRATION ........................................ 15
16- WITHE BALANCE CALIBRATION................................................... 15
EEPROMMEMORY MAPS ...................................................................16
SCHEMATICS DIAGRAMS:
CRTPCB SCHEMATICDIAGRAM ........................................................ 18
MAINPCB SCHEMATICDIAGRAM ...................................................... 19
MAIN PCB LAYOUT ............................................................................ 20
SIGNALWAVEFORMS........................................................................ 21
EXPLODEDVIEW ................................................................................. 25
PARTS LISTS:
REPLACEMENTMECHANICAL PARTSLIST........................................26
REPLACEMENTELECTRICALPARTSLIST..........................................27 


- 3 -
TC-14A04A / TC-20A04A
ABOUT LEAD FREE SOLDER (PbF)
This model uses lead free solder (PbF).
CAUTION:
•Pbfreesolderhasahighermeltingpointthanstandardsolder;typicallythemeltingpointis
50-70°F(300-400°C)higher.Pleaseuseahightemperaturesoldering iron. In case of the
solderingiron with temperaturecontrol,please set it to700 ± 20°F(370 ± 10°C).
•Pbfree solder will tend to splash whenheatedtoohigh (about 1100°F/ 600°C).
When soldering or unsoldering, please completely remove all of the solder on the pins or
solder area, and be sure to heat the soldering points with the Pb free solder until it melts
enough.

TC-14A04A / TC-20A04A
- 4 -
Ubicación de los Controles (TC-14A04A / TC-20A04A)
Panasonic
Vista frontal de la televisión
Terminal de
la antena
Salida del cable
de alimentación
Terminal de
audio / video
Botón de
ENCENDIDO /
APAGADO
Vista posterior de la televisión
Luz indicadora
Sensor de
control remoto
Botón
TV/AV
Botón de
PRE AJUSTE
Botones de
selección
secuencial de
canales
()()$4
u
PRE. TV/AV CANAL
VOL.
Ubicación de los Controles
ENCIENDE/APAGA
TIMER
SILENCIO
TV/AV
LLAMADA
NORMALIZACIÓN
MENÚ DE
IMAGEM
VOLUMEN
ACCESO DIRECTO
A LOS CANALES
WAKE-UP
(DESPERTADOR)
R-TUNE
CLOSED CAPTION
BOTONES DE
DIRECCIÕN DEL
MENU
MENÚ PRINCIPAL
SELECCIÓN
SECUENCIAL DE
CANALES
Panasonic
+
u
e
123
456
789
0
R-TUNEWAKE-UPTV/AV
CC
PIC MENU
MAIN MENU
N
OPERATING INSTRUCTIONS
Complete Operating Instructions

- 5 -
TC-14A04A / TC-20A04A
IC601 - PINOUT
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
IFIN1 18 IF input 1
IFIN2 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
Symbol Pin Description

TC-14A04A / TC-20A04A
- 6 -
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
IC VOLTAGE TABLES
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
IC601 Pin Voltage
1 0,3V
2 15,6V
3 -14V
4 -15,6V
5 67mV
6 16,5V
7 0,3V
IC451 Pin Voltage
1 183V
2
3 22,7V
4 22,3V
5 96mV
6 1,5V
7 0,52V
IC801 Pin Voltage
1 10,5V
2 10,5V
3 6,5V
4 4,3mV
5 6,3V
68V
75V
IC851
Pin Voltage
1 7,3mV
2 7,3mV
3 7,3mV
4 7,3mV
5 3,8V
6 3,8V
7 0,2V
85V
IC1103 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
IC2301
Pin Voltage
15V
2 6,4mV
3 1,27V
4 3,3V
5 6,4mV
65V
IC1201
Pin Voltage
1 0,25V
2 0,25V
3 1,9V
4 1,9V
X101
Pin Voltage
1 141V
2 8,5V
3 -8,7mV
IC802 Pin Voltage
1 10,4V
25V
3 -3,9mV
IC880
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
T801
TPA10 142V
TPA11 11,2V
BO 58 Blue output
VDDA 59 analog supply of Teletext decoder and digital supply of TV-processor (3.3 V)
VPE 60 OTP ProgrammingVoltage
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
All voltage measurements were made in POWER ON mode, with 127V 60Hz power
source and Color Bars Video Pattern.
Symbol Pin Description
IC601 - PINOUT

- 7 -
TC-14A04A / TC-20A04A
IC601 - BLOCK DIAGRAM
SOUND
TRAP
TUNERAGC
+8V
HOUT V-DRIVE
RO GO BO
BCLIN
BLKIN
CVBS3/Y
SIFIN
AUDOUT
C
SDASCL
VISION IF
PLL DEMOD.
AGC/AFC
VIDEO AMP.
VIDEO SWITCH
VIDEO IDENT.
VIDEO FILTERS
PAL/SECAM/NTSC
DECODER
DEEMPHASIS
AUDIO SWITCH
AVL
VOLUME CONTROL
BASE-BAND
DELAY LINE
H/V SYNC SEP.
H-OSC. + PLL
H-DRIVE
2
nd
LOOP
H-SHIFT
V-DRIVE +
CONTR/BRIGHTN
OSD/TEXT INSERT
CCC
WHITE-P. ADJ.
80C51 CPU
I
2
C-BUS
TRANSCEIVER
ROM/RAM
TELETEXT
ACQUISITION
1/10 PAGE MEMORY
TELETEXT/OSD
DISPLAY
RG BBL
Y U V
H
V
REF
ENHANCED
VST PWM-DAC
VST OUT
I/O PORTS
I/O PORTS (4x)
+3.3 V
RESET
LED OUT (2x)
ADC IN (4x)
VPE
EW GEOMETRY
GEOMETRY
EHTO (EWD) R/V G/Y B/U BL
RGB/YUV INSERT
RGB
REF
CVBS
SYNC
H
V
COR
SATURATION
LUMA DELAY
PEAKING
BLACK STRETCH
QSS SOUND IF
AGC
QSS MIXER
AM DEMODULTOR
SOUND PLL
CVBS2
VIFIN
CVBSO
QSSO/AMOUT
PWMS(4X)
WHITE STRETCH
BLUE STRETCH
AUDIO2
AUDIO3
AUDEEM
(AVL)
(SNDIF)
VMOUT
VMOUT
IFVO
TINT CONTROL
Y

TC-14A04A / TC-20A04A
- 8 -
CHASSIS GP3 FEATURE SUMMARY
MODELS : TC-14A04 e TC-20A04
SYSTEM :3systems(PAL-M/PAL-N/NTSC) (PAL-M50hZ)
POWER SOURCE :CAautomatic power switching (110/220)V,50/60Hz
MEMORY : 125 positions
TV TUNING RANGE :181 channels (TV / CATV)
OSD LANGUAGE :Portuguese, Spanish and English
AUDIO SYSTEM :Mono
VERTICAL MAGNETIC FIELD : -0.1 ±0.03
COLOR TEMPERATURE :(High Light) x= 0.275±0.01, y=0.284 ±0.01, Y=150 (nit))
(LowLight) x= 0.273±0.01, y=0.283 ±0.01, Y=7.0 (nit)
REFERENCE VOLTAGE
MODEL
TC-14A04A
TC-20A04A
DATA
[A]=C1H , [B]=00H , [C]=00H , [D]=33H , [E]=00H , [F]=20H , [G]=00H , [H]=01H
[A]=C1H , [B]=00H , [C]=00H , [D]=33H , [E]=00H , [F]=20H , [G]=00H , [H]=01H
MEMORY DATA
+B VOLTAGE
Buzzing confirmation
PAL color output
NTSC color output
Anode (EHT) 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
24.5 +0.7 (Kv)
24.5 -1.5 ( V)
CONTENTS TEST POINT
TPA10
TPA8
TPA9
TPA21
A22-3
ou TPA41
TPL2
TPL1
TPL1
CRT ANODE
ADJUSTMENT POINTS
D
C
C
VOLTAGE

- 9 -
TC-14A04A / TC-20A04A
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 ey on the remote control and VOL(-) button on the unit.
Aftera couple of seconds, the expression “CHK”should appear on the rightsuperior sideof the screen. (Tochange
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: To alter from CHK1 mode to CHK2, CHK3 or CHK4 modes, press key “2” to move forward and the key “1” to
moveback, asillustrated below.
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:
CHK1 mode table
Standard values
TC-14A04A
00
00
00
33
00
20
00
01
TC-20A04A
00
00
00
33
00
20
00
01
OPTION1
OPTION2
OPTION3
OPTION4
OPTION5
OPTION6
OPTION7
OPTION8
OPTION4
OPTION6
å
å
DIGITO LSB
DIGITO LSB
“4”
“4”
“3”
OPTION1 OPTION1 OPTION2 OPTION2
ááá
å ááá
DIGITO MSB DIGITO LSB DIGITO MSB DIGITO LSB
“4”
“3”
“3”
“4”
“3”
“3”
“4”
“3”
“3”
“4”
“3”
“3”
OPTION3
OPTION5
OPTION7
OPTION3
OPTION5
OPTION8
OPTION4
OPTION6
OPTION1
á
á
á
á
á
á
á
á
å
á
á
á
á
á
á
á
á
DIGITO MSB
DIGITO MSB
DIGITO MSB
DIGITO LSB
DIGITO LSB
DIGITO LSB
DIGITO MSB
DIGITO MSB
DIGITO MSB
“4”
“4”
“4”
“3”
“3”
“4”
“4”
“4”
“3”
“3”
“4”
“4”
“4”
“3”
“3”
Turn off
NORMAL MODE
OPTION CODE
SETTING
“ 2 ”
“
1 ”
VCJ
ADJUSTMENT
CHK1
SERVICE MODE
“ 2 ”“ 2 ”
“
1 ”“ 1 ”
PINCUSHION
ADJUSTMENT
WHITE BALANCE
ADJUSTMENT
CHK2 CHK3 CHK4
Note:
To select an option, type “4” to move forward
and“3” tomove back.
Afterhavingselectedthedesiredoption,adjust
it by pressing the “VOL(_)” or “VOL(+)” keys.
Press “0” to memorize the adjustment.
CHK1 mode adjustments
On CHK1 mode it is possible to adjust the items of the table shown here.
Note:
To 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” To memorize the adjustment.

- 10 -
TC-14A04A / TC-20A04A
ADJUSTMENTS
CHK2 mode adjustments
On CHK2 mode it is possible to adjust the items of the table shown here.
Note:
To 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” To memorize the adjustment.
CHK2 mode table
Standard values
TC-14A04A
24
100
50
34
50
30
30
TC-20A04A
24
100
50
34
50
30
30
RF AGC
CONT
COL
S-COL
TINT
S-TINT
BRT
CHK3 mode table
Standard values
TC-14A04A
35
36
44
18
28
TC-20A04A
35
36
44
18
28
V-SLOPE 60HZ
V-SHIFT60HZ
V-AMP 60HZ
H-SHIFT60HZ
S-CORR60HZ
CHK4 mode table
Standard values
TC-14A04A
26
25
50
28
100
21
28
31
33
2
TC-20A04A
26
25
50
28
100
21
28
31
33
2
R-CUT
G-CUT
BRT
S-BRT
CONT
S-CONT
R-DR
G-DR
B-DR
RGBCON
ADJUSTMENTS
TEST AND MEASUREMENT EQUIPMENTS
Toexecuteall these electrical adjustments, thefollowingequipmentarerequired:
•Dual-Trace Oscilloscope
Voltage Range: 0.001 V to 50 V/Div.
FrequencyRange: DC to 50 MHz
Probes: 10:1, 1:1
•NTSC Video Pattern Generator
• DVM (Digital Volt Meter)
•MTS/SAPSignal Generator
•(TV Multi-ChannelSoundModulator (U.S.A.))
•PlasticTip Driverand Non-MetalDriver
•Isolation Transformer(Variable)
• Degaussing Coil
•White Pattern Generator
•Audio Generator
CHK3 mode adjustments
On CHK3 mode it is possible to adjust the items of the table shown here.
Note:
To select an item, type “4” to move forward and “3” to move back.
Afterhavingselectedthedesiredoption,adjust it by pressingthe“VOL(_)”or“VOL(+)”
keys.
Press “0” To memorize the adjustment.
CHK4 mode adjustments
On CHK4 mode it is possible to adjust the items of the table shown here.
Note:
To select an item, type “4” to move forward and “3” to move back.
Afterhavingselectedthedesiredoption,adjust it by pressingthe“VOL(_)”or“VOL(+)”
keys.
Press “0” To memorize the adjustment.

- 11 -
TC-14A04A / TC-20A04A
ADJUSTMENTS
ITEM / PREPARATION PROCEDURE
2- VIF DETECTOR OUTPUT LEVEL
CONFIRMATION
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.
3- BUZZING CONFIRMATION
(AUDIO CIRCUIT)
1. Connect the oscilloscope with a 7 Hz filter between A22-
2 and A22-3 spea ers terminals .
2. Adjust the sound to maximum.
3. Adjust AVL: OFF
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.
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.
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. 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:
3. Connect the high voltage meter in the CRT anode pin,
and confirm that the high voltage is within [A] range.
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)
14" SAMSUNG A34KQW42X 6,30 ± 0,25 Vrms
14" PHILIPS A34EAK01X 6,15 ± 0,25 Vrms
20" SAMSUNG A48KRDB89X 6,30 ± 0,25 Vrms
20" PHILIPS A48EAK01X 6,15 ± 0,25 Vrms
CRT [A]
14” 25,2 ~ 23,0
20” 27,2 ~ 25,0
smaller than
500 m Vp-p

TC-14A04A / TC-20A04A
- 12 -
5-PALCOLOR OUTPUTSIGNALADJUSTMENT
1. Supply a color bar signal and adjust the local frequency.
2. Adjust “IMAGE” to DYNAMIC NORMAL, “CONTRAST” to
63 and “SUB-CONTRAST” to 21.
3. Adjust the “CHANNEL COLOR” level to NORMAL.
4. Set to CHK2 service mode option, press “5” on the remote
control unit and confirm that OSD becomes blue (AKB
turned off).
5. Set ABLtoOFF(in CHK2 mode, to accessBRT,CONT,S-
CONT or S-TINT).
6. Adjust[A] for2.3±0.2VthroughtheBRIGHTcontrolvariation
in the test point TPL2.
7. Confirm:
CRT 14 inch 20 inch
RGB Contrast 2 DAC 7 DAC
{352} 12 17
8. Fix G-DRIVE GAIN, R-DRIVE GAIN and B-DRIVE GAIN
data in 1FH or 31 DAC.
R-DRIVE GAIN: [SLV(8A), SUB (16)]
G-DRIVEGAIN:[SLV(8A),SUB(17)]
B-DRIVEGAIN:[SLV(8A),SUB(18)]
CALIBRATION:
1. Connect the oscilloscope in TPL2 (G-OUT) with a 10KΩ
resistor and adjust CONTRAST, so that the [B] waveform
it is 2.3±0.1V with 14 CRT and 2.6±0.1V with 20 CRT.
2. Adjust SUB-COLOR to obtain 2,45±0.1V in [D]
according to fig. 1.
3. Connect the oscilloscope in TPL1 (R-OUT) with a 10KΩ
resistor and confirm that the [C] waveform it is 2.45±0.1V
according to fig. 2.
4. Press the ey 5 (AKB ON) and confirm that OSD
becomes white.
Fig. 1
A = 2.3 ±0.1Vo-p
B = 2.4±0.1V
D = 2.45±0.1V
Fig. 2
A = 2.3 ±0.2Vo-p
C = 2.45±0.1V
6-NTSCSUB-TINT CALIBRATION
1. Connect the oscilloscope in TPL1 (R-OUT) with a 10KΩ
resistor.
2. Supply a Rainbow signal (NTSC 3.58 MHz) through
VIDEO IN.
3. Select IMAGE to DYNAMIC NORMAL.
4. Select COLOR FOR CHANNEL to NORMAL.
5. On CHK2 service mode, press 5 (AKB OFF) and confirm
that OSD becomes blue (AKB turned off).
6. Set ABL to OFF (on CHK2 mode, to access BRT, CONT,
S-CONT or S-TINT).
CALIBRATION:
1. Adjust [C] for 5.0±0.2V through the BRIGHT control
variation (CHK2) according to fig. 1.
2. Adjust SUB TINT-NTSC so that the levels of positions 2,
3 and 4 of Fig. 1 in accordance with the Fig. 2.
3. Set ABL to ON.
4. Press 5 and confirm that OSD becomes white (AKB
turned on).
Fig. 1 Fig. 2
7-PROTECTIONCIRCUIT(SHUTDOWN)
CONFIRMATIONOFOPERATION
1. Supply a crosshatch pattern signal and adjust the
CONTRAST and BRIGHT DAC controls to minimum.
(Ibeam=0 µA)
CONFIRMATION:
1. Connect the voltmeter in TPA22 and confirm that the
voltage is smaller than [A].
2. Connect a DC source in TPA22 and confirm that the
protection circuit doesn't act when the voltage is [B].
3. Confirm that the protection circuit acts with smaller voltage
than [C].
Condition 14 20
A21,6V 22,4V
B23,4V 23,4V
C26,1V 26,1V
ADJUSTMENTS
ITEM / PREPARATION PROCEDURE

- 13 -
TC-14A04A / TC-20A04A
Fig. 1
1 2 3 3 2 1 Fig. 2
9- FOCUS CALIBRATION
• Assure that the SUB-BRIGHTNESS adjustment has been
done.
1. Supply a Philips or monoscope pattern signal.
2. AdjustIMAGEMENU to DYNAMIC NORMAL.
CALIBRATION:
1. Adjust the FOCUS variable resistor for the point of better
adjustment.
with PHILIPS signal .... ta e as reference for adjustment
the third vertical line (fig. 1).
with MONOSCOPE signal in the number 4 (fig.2).
8-SUB-BRIGHTANDSUB-CONTRAST
CALIBRATION
1. Supply a WINDOW pattern signal.
2. AdjustIMAGE MENU toDYNAMIC NORMAL
SUB-BRIGHTCALIBRATION
1. Position the color analyzer in the LOW LIGHT image
area.
2. Ajust S-BRT <CHK 4> control, so that it is Y=0,7±0.2 for
14" or 20" CRT.
SUB-CONTRASTCALIBRATION
1. Position the color analyzer in the HIGH LIGHT image
area.
2. Ajust S-CONT <CHK 4> DAC control, so that it is
Y=380±20 to 14 and Y=230±20 to 20 CRT.
3. If impossible to obtain that adjustment, adjust SUB-
CONT <CHK 4> again.
4. Chec the SUB-BRIGHT adjust.
10-PURITYCALIBRATION
1. Adjustthe HELMHOLTZ device forthelocal magnetic field
(HORIZONTAL: 0 ± 0.03 X 10-4T)
2. Let the set warm up (aging time) for a minimum of 60
minutes.
3. Supply a purity pattern (white pattern).
4. AdjustCONTRASTand BRIGHTtoMAXIMUM.
5. The static convergence adjustment must have been
made preliminarily.
6. Connect a DC ampere meter between FBT pin11 (-) and
FBT pin3 (+), and adjust to 920mA±10% in the 14" CRT
and 1200mA±10% in the 20", varying the S-BRT DAC
control.
CALIBRATION:
1. Position the “ears” of the purity magnets both upward.
2. Adjust the purity until the markers in the purity jig
monitorscope becomes symmetrical in the horizontal
direction.
3. The vertical centralization correction is made through
the purity magnets for stripe CRT type only.
4. Slide the yoke forward by 10 mm±5 in the monitor. Then,
tighten the deflection yoke.
5. Repeat the procedures 2 ~ 4.
6. Press the belt of deflection yoke.
7. Adjust “beam landing” using a microscope. (for model
change or instrument check only)
4
ADJUSTMENTS
ITEM / PREPARATION PROCEDURE

TC-14A04A / TC-20A04A
- 14 -
11-WHITEQUALITY CALIBRATION
PREPARATION:
1. Adjust the HELMHOLTZ device to local magnetic field. Ho-
rizontal: 0 ± 0.003 x 10-4T
2. Receive a white purity pattern.
3. Adjust CONTRAST and BRIGHT controls to maximum.
4. Previously adjust the CONVERGENCE.
5. Fully degauss the CRT by using an external degaussing
coil.
CALIBRATION:
1. Adjustthemagnetic field in 0.4x10-4T(400mG), and check
thewhite quality withtheCRTturned to EASTandto WEST.
2. Receive a red pattern, adjust the COLOR control to
maximum and confirm the purity adjustment.
3. If purity error is found at the CRT corners, apply magnetic
tapes to correct it, fully degauss the CRT again and repeat
the steps 1 and 2. Don't use this magnetic tapes on the
internal side of the yoke.
4. Receive a white purity pattern, adjust the COLOR control
to minimum and confirm the purity adjustment.
12-CONVERGENCECALIBRATION
1. Adjust the HELMHOLTZ device to local magnetic field.
2. Receive a crosshatch pattern.
3. Adjust IMAGE menu to DINÂMIC NORMAL and the DAC
BRIGHT control for the crosshatch pattern to be gray.
4. Remove the DY wedges and slightly tilt the deflection
yoke to the vertically and horizontally to obtain the good
overall convergence.
5. If purity error is found, repeat “Color Purity” adjustment
CALIBRATION
Static convergence calibration
l) Assure that the magnets are positioned according to
illustration 1.
ll) Adjust the 4 poles magnets to align the R and B
CENTRAL DOTS and adjust the 6 poles magnets to
align both DOTS with G.
lll) After adjustment above, assure that the magnets are
sealed, through the application of white glue.
Note:The electron beams are moved rotationally when the
static convergence magnets are rotated.
The reduction of rotational beams differ depending of
the two magnets angle. Therefore, it is necessary to
repeat the magnets calibrations sometimes, until
obtaining a good alignment.
13- CRT CUT OFF CALIBRATION
1. Supply a WINDOWS signal.
2. Position DACs with the data below:
BRT —> 50H
S-BRT —> 31H
RGBCONTRAST —> 02H w/14” and 07H w/ 20” CRT
SUB-CONTRAST —> 21H
R,G,BDRIVE —> 31H
R,GCUT —> 31H
CALIBRATION:
1. Press “5” (AKB OFF) and confirm that OSD becomes
blue.
2. Connect the oscilloscope in TPL5 and adjust BRT to
obtain 130V as in the Fig. 1 below.
3. Adjust the SCREEN to obtain a horizontal fine line in the
screen center.
Y = 1.0 +1.0 -0.5
4. Press “5” (AKB ON) and confirm that OSD becomes
white.
Fig. 1
ADJUSTMENTS
ITEM / PREPARATION PROCEDURE
4 poles magnets (G-3)
6 poles magnets (R-G-B)

- 15 -
TC-14A04A / TC-20A04A
14- VERTICALDEFLECTIONCALIBRATIONAND
CONFIRMATION
1. Adjust IMAGE to DYNAMIC NORMAL
S-CORRCONFIRMATION ANDCALIBRATION
1) Confirmation in 50Hz
1. Supply a PHILIPS PAL-N signal.
2. Confirm that S-CORR 50Hz is in [18] DAC.
2) Confirmation in 60Hz
1. Supply a MONOSCOPE signal.
2. Confirm that S-CORR 60Hz is in [18] DAC.
3) V-SLOPE calibration
1. Supply a MONOSCOPE signal.
2. Adjust V_SLOPE (CHK3) so that the beginning of the
black part of the image is aligned with the center of the
CRT as Fig. 1.
4) VERTICAL CENTRALIZATION 50HZ CALIBRATION
1. Supply a PAL-N Philips signal.
2. Adjust V-SHIFT 50Hz (CHK3) so that the Philips
pattern’s center it is in the center of the CRT.
5) VERTICAL CENTRALIZATION 60HZ CALIBRATION
1. Supply a MONOSCOPE signal.
2. Adjust V-SHIFT 60Hz (CHK3) so that the monoscope
pattern´s center it is in the center of the CRT.
6) VERTICAL HEIGHT(V-AMP50HZ) CALIBRATION
1. Supply a PHILIPS PAL-N signal.
2. AdjustV-AMP-50Hz(CHK3) sothatthe Philipspattern’s
circle height be the same dimension of the width.
7) VERTICAL HEIGHT(V-AMP60HZ) CALIBRATION
1. Supply a MONOSCOPE signal.
2. Adjust V-AMP-60Hz (CHK3) according to box.
3.MEMORIZEinEEPROM.
Fig. 1
Fig. 2
16-WHITEBALANCE CALIBRATION
1. Adjust the HELMHOLTZ device to local magnetic field.
2. Let the set warm up for a minimum of 30 minutes.
3. Receive a white balance. (This sign should contain
burst sign).
4. Adjust the IMAGE menu to DINÂMIC NORMAL.
5. Fully degauss the CRT by using an external degaussing
coil.
6. Position the color analyzer in contact with the CRT face.
CALIBRATION:
[1]LOWLIGHT CALIBRATION
1. Adjust S-BRT, so that Y = 7
2. Adjust R-CUT OFF, so that x = 0.273 ±0.01
3. Adjust G-CUT OFF, so that y = 0,283 ±0.01
[2]HIGHLIGHTCALIBRATION
(Confirm that G-DRIVE is 31 DAC)
1. Adjust S-BRT, so that Y = 150
2. Adjust R-DRIVE, so that x = 0,275 ±0.01
3. Adjust B-DRIVE, so that y = 0,284 ±0.01
[3] Repeat the procedures [1] and [2].
ADJUSTMENTS
ITEM / PREPARATION PROCEDURE
CRT->
C,D
A,B
14
1.9 ~ 2.2
1.5 ~ 2.3
20
1.5 ~ 2.0
1.5 ~ 1.6
Assure that not entering light for the meter borders and that the CUT OFF voltage calibration has been done. If the value in the
color analyzer is below 1 0, adjust CONTRAST to 0 and press 8 in CHK2 mode.

TC-14A04A / TC-20A04A
- 16 -
EEPROM MEMORY MAPS
TABLE A0 (0XX)
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 02 00 06 01 00 06 02 00 06 03 00 06 04 00 06 05
10 00 06 06 00 06 07 00 06 08 00 06 09 00 06 0A 00
20 06 0B 00 06 0C 00 06 0D 00 06 0E 00 06 0F 00 06
30 10 00 06 11 00 06 12 00 06 13 00 06 14 00 06 15
40 00 06 16 00 06 17 00 06 18 00 06 19 00 06 1A 00
50 06 1B 00 06 1C 00 06 1D 00 06 1E 00 06 1F 00 06
60 20 00 06 21 00 06 22 00 06 23 00 06 24 00 06 25
70 00 06 26 00 06 27 00 06 28 00 06 29 00 06 2A 00
80 06 2B 00 06 2C 00 06 2D 00 06 2E 00 06 2F 00 06
90 30 00 06 31 00 06 32 00 06 33 00 06 34 00 06 35
A0 00 06 36 00 06 37 00 06 38 00 06 39 00 06 3A 00
B0 06 3B 00 06 3C 00 06 3D 00 06 3E 00 06 3F 00 06
C0 40 00 06 41 00 06 42 00 06 43 00 06 44 00 06 45
D0 00 06 46 00 06 47 00 06 48 00 06 49 00 06 4A 00
E0 06 4B 00 06 4C 00 06 4D 00 06 4E 00 06 4F 00 06
F0 50 00 06 51 00 06 52 00 06 53 00 06 54 00 06 55
ITEM ADDR 14 Inches 20 Inches FUNCTION
*3 392 00 FA Color offset
*5 352 12 17 RGB Contrast
*6 254 20 2D Sharpness  Picture user data
*7 284 20 2D Sharpness  Picture normalize
*8 3BB 05 03 H.Shift Offset - NTSC
*9 3BE FC 00 Sharpness Offset (AV)
Observation:
*/XX : Data subjects to alterations in the calibration process (values no fixed).
@: Data of channels
[A-M] : Corresponds to the specification of specific production of each model.
: Fixed data (it doesn't alter in the calibration process)
14 & 20 INCHES DIFFERENCES TABLE

- 17 -
TC-14A04A / TC-20A04A
TABLE A2 (1XX)
TABLE A4 (2XX)
TABLE A6 (3XX)
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 00 06 56 00 06 57 00 06 58 00 06 59 00 06 5A 00
10 06 5B 00 06 5C 00 06 5D 00 06 5E 00 06 5F 00 06
20 60 00 06 61 00 06 62 00 06 63 00 06 64 00 06 65
30 00 06 66 00 06 67 00 06 68 00 06 69 00 06 6A 00
40 06 6B 00 06 6C 00 06 6D 00 06 6E 00 06 6F 00 06
50 70 00 06 71 00 06 72 00 06 73 00 06 74 00 06 75
60 00 06 76 00 06 77 00 06 78 00 06 79 00 06 7A 00
70 06 7B 00 06 7C 00 06 7D 00 06 00 00 00 00 00 00
80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
A0 06 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 02 00 A5 5A 00 *1 01 00 00 08 00 04 00 00 01 00
10 00 00 00 00 00 00 00 00 20 00 00 00 00 00 00 00
20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 20 20 20 3F *6 20 20 20 2D 20 1E 20 20 23 1E 20
60 2D 2A 34 32 24 24 00 00 00 20 20 20 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 78 BB
80 20 20 20 3F *7 20 20 20 2D 20 1E 20 20 23 1E 34
90 32 24 24 00 00 00 2D 2A 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0 02 19 15 *2 00 1B 00 00 00 04 04 04 00 00 00 00
C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 0C 10 15 04 06 06 00 04 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 [A] [B] [C] [D] [E] [F] [G] [H]
F0 00 00 18 20 15 1A 00 00 00 00 00 00 00 A5 3F A5
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20 00 00 B6 B7 20 10 28 18 B0 00 00 00 12 00 00 00
30 1B 20 00 22 17 1A 0F 0F 2B 12 1F 12 20 19 1F 1F
40 1F 1F 1F 00 06 00 00 00 10 00 2A 00 34 *4 30 20
50 02 48 *5 40 00 80 34 01 00 00 00 00 00 00 00 00
60 00 FF 1C 12 19 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 00 00 00 10 00 00 00 00 00 00 00
80 00 00 00 00 00 00 00 0E 11 0D 06 0C 07 0C 02 00
90 09 00 *3 00 00 00 00 0A F8 00 00 00 00 00 00 03
A0 01 03 02 03 03 00 34 12 12 2B *10 63 03 00 20 30
B0 4A 49 4B 00 01 00 00 FF 00 04 05 *8 03 F8 *9 F2
C0 20 07 4F 40 40 00 00 00 00 00 00 00 00 00 00 00
D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

TC-14A04A / TC-20A04A
- 18 -
SCHEMATIC DIAGRAMS
CRT PCB SCHEMATIC DIAGRAM
IC351
TDA6107JF/N3
TNP4G276-6
CRT CIRCUIT
L5L8
L8A
JK351A
JK351

TC-14A04A / TC-20A04A
- 19 -
MAIN PCB SCHEMATIC DIAGRAM
SEE IC601 PINOUT
TABLE BELOW
IC601 PINOUT

TC-14A04A / TC-20A04A
- 20 -
MAIN BOARD CIRCUIT LAYOUT