Panasonic TC-20B10P User Manual
Order no. DCS - SET2000 - 001- MS
Service Manual
Color Television
TC-14B10P
TC-20B10P
Chassis MX5Y
Specifications
TV MODEL
Power Source
Power consumption, Max (A)
Antenna Input
Colour System
Tuning System
110/220 V AC, 50/60 Hz
75Ω - VHF/UHF/CATV
NTSC/AUTO/PAL-M/PAL-N
TC-14B10P
automatic switch
80W
F.S.T
ENGLISHESPAÑOL
TC-20B10P
110/220 V AC, 50/60 Hz
automatic switch
90W
75Ω - VHF/UHF/CATV
NTSC/AUTO/PAL-M/PAL-N
F.S.T
Channels Receiving
Picture Tube
(Measured Diagonally)
Audio Output
AV Input
Dimensions (W x H x D)
Weight
Remote Control Transmiter:
Power Source 3V (2 R6 batteries)
Infrared Length 9500 A (Angstron)
Number of Buttons 27 buttons
Dimensions (W x H x D) (51 x 28 x 150) mm
Wight 55g
Design and specifications are subject to change without notice
2 to 13 (VHF)
14 to 69 (UHF)
1 to 125 (CATV)
3W max (RMS)
1 (front) - 1 (rear)
370 x 351 x 366 mm
®
Panasonic
34 cm
9,6 kg
2 to 13 (VHF)
14 to 69 (UHF)
1 to 125 (CATV)
48 cm
3W max (RMS)
1 (front) - 1 (rear)
502 x 455 x 471 mm
17 kg
Provided accessories
l
1 Remote Control Transmiter
l
1 Balum 300Ω / 75Ω (Balum)
l
2 R6 size batteries 1,5V (ABNT/IEC)
l
1 Internal antenna (only for 14 models)
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 whit the manufacturers specified replacement
parts to prevent X-ray radiation, shock, fire or other hazards. Do not modify the original design whitout manufacturers permission.
TABLE OF CONTENTS
OPERATION GUIDE ............................................................................. 03
SERVICE ADJUSTMENTS AND CALIBRATIONS
HOW TO OPERATE THE DAC CONTROLS ..................................... 06
HOW TO ENTER THE SERVICEMAN MODE ..................................... 06
HOW TO EXIT THE SERVICEMAN MODE ......................................... 06
DAC DIRECT TABLE ............................................................................ 07
MEMORY - DIRECT ACCESS METHOD ............................................. 07
EEPROM - MEMORY MAP .................................................................. 07
ELECTRICAL INSPECTION .................................................................. 07
INSPECTION OF THE DEFLECTION CIRCUITS ................................ 07
CUT OFF - PRE ADJUSTMENTS ........................................................ 08
CALIBRATION OF VIDEO IF ................................................................ 08
AFT ADJUSTMENTS ............................................................................. 09
AGC-RF ADJUSTMENTS ...................................................................... 09
NOISE LEVEL ADJUSTMENTS ............................................................ 09
VIDEO OUT ADJUSTMENTS ............................................................... 10
SUB-CONTRAST ADJUSTMENTS ....................................................... 10
COLOUR SATURATION ADJUSTMENTS .......................................... 10
SHARPNESS ADJUSTMENTS ............................................................. 10
SHUT DOWN SYSTEM COFIRMATION .............................................. 10
HORIZONTAL WIDTH AND CENTERING ADJUSTMENTS .............. 11
VERTICAL HEIGHT AND CENTERING ADJUSTMENTS ................... 11
WHITE BALANCE PRE ADJUSTMENTS ........................................... 11
CRT CUT OFF ADJUSTMENTS ........................................................... 11
FOCUS ADJUSTMENTS ..................................................................... 12
FRONT PANEL CHECKING ................................................................. 12
AV IN TERMINALS CHECKING ........................................................... 12
AUTOMATIC AND MANUAL MEMORIZATION .................................... 13
TUNE CHECKING ................................................................................. 13
AUDIO CHECKING ................................................................................ 13
PURITY AND CONVERGENCE ADJUSTMENTS .............................. 14
SCHEMATICS DIAGRAMS ................................................................... 15
IC601 BLOCK DIAGRAM / PINS AND FUNCTIONS ........................... 16
WAVE FORMS ...................................................................................... 17
CABINET PARTS LOCATION ............................................................... 19
CABINET REPLACEMENT PARTS LIST ............................................. 20
ELECTRICAL REPLACEMENT PARTS LIST ...................................... 21
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
manufacturers 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 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 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
shieldinf 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 operatore.
Do not use a line isolation transformer when testing.
Warning !
It is essential that these critical parts are replaced
with the manufacturers specified replacement parts
to prevent X-ray radiation, shock, fire or other
hazards.
WARNING !!
Esquema Elétrico do chassi MX5Y ................. (em anexo)
Conserve-o sempre junto deste manual.
- 2 -
HOW TO OPEN THE CABINET
Screw
Screw
Operation Guide TC-14B10P / TC-20B10P
ENGLISH
- 3 -
Operation Guide TC-14B10P / TC-20B10P
- 4 -
Operation Guide TC-14B10P / TC-20B10P
ENGLISH
- 5 -
TC-14B10P / TC-20B10PService Adjustments and Calibrations
HOW TO OPERATE THE DAC CONTROL MX5Y
FUNCTIONS ADJUSTMENTS
1- SERVICEMAN MODE
1.1- TO ENTER CHQ MODE (SERVICE):
Set the OFF TIMER to 30 using the remote control
and adjust minimum volume at the TV panel. Press
simultaneously RECALL at the remote control and
VOL(-) at the tv panel. The white screen will appear
on receiver. Press RECALL again and the letters
CHQ will appear magenta with a blue background.
1.2- To alternate between CHQ modes, press 1 or 2
at the remote control (CHQ1 to CHQ5)
1.3- TO EXIT CHQ MODE (SERVICE):
Press N at the remote control, or just turn off the TV
using the remote control.
CHQ1
1.1- Press3or 4 to alternate the existing options: from
OP1 to OP6.
1.2- To change the data inside each sub-item press
VOL(+) or VOL(_) (the letter will be red). To memorize
the modifications press 0 (the letter will come back
to green).
OP1 (Colour system)
This option alternates between colour systems that will be
available within the TV set.
OP1=0 auto/PAL-M/NTSC (mod. Binorma)
OP2=1 auto/PAL-M/PAL-N/NTSC (mod. Trinorma)
OP1=2 Pal-M (mod.Pal-M)
OP2 (Game Function)
This option may turn the function GAME on/off.
OP3 (PANASONIC DEMO)
This option may turn the function DEMO on/off.
OP4 (TELE-TEXT) - not available
This option may turn the function TELE-TEXT on/off.
CHQ2
1.1- Press 3 or 4 to alternate between existing positions
like the sequence below:
To change between the data of each sub-item press
VOL(+) or VOL(_), the letter will stay green. No need
to memorize.
COLOUR ..........................USER
SUB-COLOUR .................CALIBRATION
TINT .................................USER
SUB-TINT ........................CALIBRATION
BRIGHT ........................... USER
SUB-BRIGHT .................. CALIBRATION
CONTRAST ..................... USER
SUB-CONTRAST ............ CALIBRATION
PURITY ............................USER
SUB-PURITY ...................CALIBRATION
CHQ3
1.1- Press 3 or 4 to alternate between the existing
options, as sequence below:
To change between the data in each sub-item press
VOL(+) or VOL(_), the letter will stay green. No need
to memorize.
HC ....................... HORIZONTAL CENTERING
VC ....................... VERTICAL CENTERING
V ALT .................. VERTICAL HEIGHT
CHQ4
1.1- Press 3 or 4 to alternate between the existing
options, as sequence below:
To change between the data in each sub-item press
VOL(+) or VOL(_), the letter will stay green. No need
to memorize.
AFT ..................... AFT CALIBRATION
VID................ VIDEO LEVEL CALIBRATION
RF..............AGC-RF CALIBRATION
CHQ5
1.1- Press 3or 4 to alternate between the existing
options, as sequence below:
To change between the data in each sub-item press
VOL(+) or VOL(_), the letter will stay green. No need
to memorize.
CHQ5 Options:
OP5 (SASO) - not available
This option may turn the function SASO on/off.
OP6 (NOISE MUTE) - not available
This operation may turn the function NOISE MUTE on/off.
Without the blue screen, it cuts off the noise when you are
working on a channel without reception or very weak signal.
B-CUT...........BLUE LOW LIGHT CALIBRATION
G-CUT.......... GREEN LOW LIGHT CALIBRATION
R-CUT...........RED LOW LIGHT CALIBRATION
B-DR......... BLUE HIGHT LIGHT CALIBRATION
R-DR......... RED HIGH LIGHT CALIBRATION
SUB-BR........ SUB BRIGHT CALIBRATION
BRIGHT........ BRIGHT CALIBRATION
- 6 -
TC-14B10P / TC-20B10PService Adjustments and Calibrations
1.2- Press 5 at the remote control to make appear a white
line for screen calibration. In order to make tHe line
disappear press 5 again.
DAC DIRECT TABLE
CHQ1 CHQ2 CHQ3 CHQ4 CHQ5
OP1 SUB-COR HC AFT B-CUT
OP2 COR VC VID G-CUT
OP3 SUB-NITIDEZ V ALT RF R-CUT
OP4 NITIDEZ --- B-DR
OP5 SUB-CONTRAST R-DR
OP6 CONTRAST SUB BR
--- SUB-BRIGHT BRIGHT
--- BRIGHT ---
--- SUB-MATIZ ---
--- MATIZ ---
---
---
---
---
---
---
---
---
---
---
---
---
---
MEMORY - DIRECT ACCESS METHOD
1.1- To obtain direct access to memory go to item CHQ1,
press simultaneously VOL(_) at the TV set and mute
at the remote control.
1.2- To alternate between memory positions press 3or 4.
1.3- To change the contents of each memory positions
press VOL(+) or VOL(_), the letter will remain red. To
memorize the changes press 0, the letter will go
back to white.
1.4- To exit memory press 1 or 2 to alternate between
the CHQs or press N to exit SERVICE MODE .
DATA MEMORY ON THE SCREEN
ELECTRICAL INSPECTION
1- EQUIPMENTS REQUIRED
1.1- High voltage meter, range to 30kv (eletrostatic or
resistive)
1.2- Voltmeter, range 30VDC, 150 VDC and 300VAC
1.3- Voltmeter RMS
1.4- DY,CY,CRT
2- PREPARATION
2.1- Position controls on the following positions:
NORMAL IMAGE....ADJUSTED
VOLUME.......... MINIMUM
TV/VIDEO............ TV
POT SCREEN................CENTER
POT FOCUS...........BEST POINT ( VISUAL)
3- VOLTAGE INSPECTION
3.1- Adjust AC input voltage to 110V.
3.2- Turn on the S801 switch.
3.3- Apply a CROSS HATCH pattern.
3.4- Adjust controls SUB BRIGHT ( SUB BR) in CHQ5
and SCREEN to obtain corrente de feixe zero.
3.5- Verify the voltage on the points below:
VOLTAGE
90V ± 2,0V
190V ± 15V E33 - PIN 1 300V
22V ± 2,0V D850 (K) 30V
44V ± 2,5V D852 (K) 50V
9V ± 1V TPE9 30V
5V ± 1V TPE10 30V
6,3 V
± 0,24V
RMS
180V ± 15V E33 - PINO 1 300V
TEST POINT METER
C823 (+) 300V
Y33 - PIN 4
For 14 models only
30V
RMS
ENGLISH
EEPROM MEMORY MAP
3.6- Position SCREEN and SUB BRIGHT ( SUB BR) to a
level where image is visible.
INSPECTION OF THE DEFLECTION
CIRCUITS AND PRE-ADJUSTMENTS
1- REQUIRED EQUIPMENTS.
1.1- High voltage meter, range up to 30Kv (eletrostatic or
resitor).
2- PROCEDURES.
2.1- Apply a PHILIPS pattern.
2.2- Select VERTICAL HEIGHT (V ALT) in CHQ3.
2.3- Adjust the heigth to obtain a correct image.
2.4- Apply a CROSS HATCH pattern.
2.5- Adjust BRIGHT, SUB BR, in CHQ5, SCREEN
minimum to obtain current=0
2.6- Measure high voltage with the voltmeter and verify if
is within the limits below:
METER
ELETROSTÁTICO
RESISTIVO
- 7 -
20 INCHES 14 INCHES
26,5 + 1,0 _ 1,5KV 24,5 + 1,0 _ 1,5KV
26,0 + 1,0 _ 1,5KV 24,0 + 1,0 _ 1,5KV
TC-14B10P / TC-20B10PService Adjustments and Calibrations
2.7- Apply a PHILIPS pattern.
2.8- Adjust BRIGHT, SUB BR, in CHQ5, SCREEN to
obtain normal image.
2.9- Check if horizontal width is normal
2.10- Select SUB BR in CHQ5 and check if BRIGHT is
controlled by varying SUB BR in CHQ5.
2.11- Select HORIZONTAL CENTERING (HC) in CHQ3
(Service Mode) and adjust convergence.
2.12- Select VERTICAL CENTERING (VC) in CHQ3
(Service Mode) and adjust convergence.
3- PRÉ AJUSTE DO AGC RF.
3.1- Apply a PHILIPS pattern.
3.2- Adjust the signal level to 65±2bB (75Ω open).
3.3- Select RF AGC in CHQ4 Service Mode and increase
it pressing VOL(+). Verify if snow appear when the
RF AGC register is increased. Then decrease it slowly
by using VOL(_) until the snow has disappeared.
CUT OFF - PRE ADJUSTMENTS
1- REQUIRED EQUIPMENTS.
1.1- Oscilloscope.
1.2- Connect oscilloscope between TPY1 (Q352-C) and
ground.
1.3- Position controls/adjust following the information
below:
R HIGH LIGHT (R-DR)..................40H
B HIGH LIGHT (B-DR)...................40H
R LOW LIGHT (R-CUT).................000H
B LOW LIGHT (B-CUT).................000H
G LOW LIGHT (G-CUT)................ 125H
COR...............................................MINIMUM
CONTRASTE................................ MAXIMUM
SCREEN........................................MINIMUM
1.4- Apply a PHILIPS pattern.
1.5- Press 5 at the remote control to obtain a simple
horizontal line
1.6- Adjust G-CUT to obtain a reading at TPY1, as figure
below.(*)
1- SOUND INSPECTION
1.1- Verify if sound varies correctly pressing VOL(+) or
VOL(_).
1.2- Verify if tone is adjusted using the TONEcontrol at
the SOUND Menu.
2- INSPECTION OF COLOUR CONTROL
2.1- Apply a PHILIPS pattern.
2.2- Select Pic. Menu DYNAMIC, and adjust NORMAL
IMAGE using the remote control.
2.3- To access the function NORMAL IMAGE press MAIN
MENU and next press the < or > navigation keys to
select the function IMAGE.
Press the navigation keys to enter menu. Press the
N key at the remote control to activate function
NORMAL IMAGE.
2.4- Verify if saturation is normal and sufficcient.
2.5- Confirm the variation of the colour phase acting at the
TINT control, receiving NTSC pattern.
3- OTHER INSPECTIONS.
3.1- Tune the VHF, UHF and CATV channels and check if
there is good reception.
3.2- Press the key TV/VIDEO and verify ON SCREEN.
3.3- Return to the TV Mode.
<
CALIBRATION OF VIDEO IF
1- REQUIRED EQUIPMENT
1.1- Monitor
1.2- VIF generator
1.3- VIF detector
1.4- Power source of 9,0 ±0,1V and 4,0 ±0,1V
1.5- Bias box to AGC
1.6- Resistor Jumper of 1KΩ
CONEXIONS
(*) 20 inch 160 ± 2Vo-p
(*) 14 inch 140 ± 2Vo-p
0V
1.7- Adjust SCREEN until a first line appears at the screen,
and dont change it after this.
1.8- Adjust the other DACs that match the other two
colours (R-CUT, B-CUT) until it turns the line white.
1.9- Exit to Normal Mode pressing NORMAL at the remote
control.
- 8 -
TC-14B10P / TC-20B10PService Adjustments and Calibrations
CALIBRATION OF VIDEO IF ( continuing)
1- PREPARATION
2.1- Connect the VIF generator positive output cable to
TPE33 and the negative to ground.
2.2- Connect the VIF detector positive output cable to TPE13
and negative to ground.
2.3- Connect the +9V power source positive to pin 3 of IC851
and negative to ground.
2.4- Connect the +4V power source positive in series with
1KΩ resistor to pin 63 of IC601 and negative to ground.
2.5- Connect the polarization of AGC with positive to TPE21
(IF AGC) and negative to the ground.
2.6- Enter Serviceman Mode.
2- ADJUSTMENTS
3.1- Calibrate monitor to 200mVp-p
3.2- Decrease the VIF generator output to minimum signal.
3.3- First, turn on the instruments and after that, the power
sources.
3.4- Adjust bias AGC to obtain maximum gain.
3.5- Adjust the VIF generator output to obtain 200mVp-p at
the monitor.
3.6- Increase 20dB to VIF generator output and adjust the
Bias AGC to obtain 200mVp-p at the monitor
3.7- Confirm that the level of CC (42,17 MHz) and PC (
45,75 MHz) are within the especificated below.
ZERO BEAT
↓
42,75
200m Vp-p
CC 42,17
45 ± 15%
45,00
PC 45,75
45 ± 15%
3- ADJUSTMENTS
3.1- Adjust AFT using coil L167 until the voltage below
(*) is obtained at TPE29.
(*) 4,0±1,0V (after 10 seconds ON)
(*) 4.5±1,0V (after heating)
3.2- Vary the frequency of CW oscillator between
±100KHz and verify if tension variation at the
multimeter is higher than ±1,2V
AGC-RF ADJUSTMENTS
ENGLISH
1- REQUIRED EQUIPMENT
1.1- Digital Multimeter
1.2- Attenuator
2- PREPARATION
2.1- Tune a COLORBAR patten.
2.2- Adjust the input signal level to 64±2dB ( 75Ω open).
2.3- Connect Digital multimeter between TPE23 and
ground
3- ADJUSTMENTS
3.1- Select DAC AGC RF(RF) CHQ4 (Service Mode)
3.2- Adjust the DAC using the keys VOL(+) and VOL(_)
until ±6,2V at TPE23.
NOISE LEVEL ADJUSTMENTS
1- REQUIRED EQUIPMENTS
1.1- Oscilloscope
1.2- 7KHz filter
41,65
39,75
41,25
47,25
AFT ADJUSTMENTS
1- REQUIRED EQUIPMENTS
1.1- Oscilator CW 45,75 MHz
1.2- VIF detector
1.3- Digital multimeter
1.4- Short Jumper
2- PREPARATION
2.1- Disconnect the signal from the antenna terminal
2.2- Connect the multimeter between TPE29 and ground
2.3- Connect the CW oscilator using VIF detector
between TPE33 and ground
2.4- Adjust the CW oscilator output to 90+-5dBu
(75Ω open).
2.5- Position the DAC AFT in 80H.
Oscilloscope
2- PREPARATION
2.1- Tune a COLORBAR patten (no sound modulation).
2.2- Position tone control to center
2.3- Position VOLUME control to maximum.
2.4- Connect Oscilloscope to speakers terminals.
3- VERIFICATION
3.1- The maximum amplitude of the noise signal should
be less than 1,5Vp-p.
3.2- When it is higher than 1,5Vp-p, activate 7KHz filter
at the speakers terminals and verify if noise level is
less than 0,5Vp-p.
1,5Vp-p
- 9 -
TC-14B10P / TC-20B10PService Adjustments and Calibrations
VIDEO OUT ADJUSTMENT
1- REQUIRED EQUIPMENT
1.1- Oscilloscope
1.2- Attenuator
2- PREPARATION
2.1- Apply a COLORBAR patten.
2.2- Adjust the input signal level to 75dB (75Ω open).
2.3- Connect the test tip of oscilloscope to TPE11
3- ADJUSTMENTS
3.1- Select DAC VIDEO (VID) CHQ4 (Service Mode).
3.2- Adjust the video signal level to 1,0±0,05Vo-p using
the keys VOL(+) and VOL(_).
1,0Vo-p
SUB-CONTRAST ADJUSTMENTS
1- REQUIRED EQUIPMENT
1.1- Oscilloscope
1.2- Jumper
1.3- Attenuator
COLOUR-SATURATION ADJUSTMENT
1- REQUIRED EQUIPMENT
1.1- Oscilloscope
1.2- Jumper
2- PREPARATION
2.1- Tune a COLORBAR patten.
2.2- Adjust the input signal level to 75dB (75Ω Open).
2.3- Confirm that the Picture Menu is DYNAMIC
2.4- Confirm that channel colour is NORMAL
2.5- Confirm that temperature of colour is NORMAL
2.6- Connect oscilloscope between TPE27 and ground
2.7- Connect the jumper between TPE3 and ground
2.8- Position controls at the following positions:
G LOW LIGHT (G-CUT)25H
BRIGHT.......NORMAL OR CENTER
CONTRAST.... NORMAL OR MAX.
COLOUR NORMAL OR CENTER
3- ADJUSTMENTS
3.1- Select DAC SUB BRIGHT at CHQ2.
3.2- Adjust SUB BRIGHT to make the pedestal level
remain 2,2±0,1Vp-p and confirm that there is no
deformation of waveform.
3.3- Select DAC SUB-COLOUR at CHQ2.
3.4- Adjust SUB- COLOUR level to 2,5±0,1Vp-p at
TPE27, as shown on figure below:
2- PREPARATION
2.1- Tune a COLORBAR patten.
2.2- Adjust the input signal level to 75dB (75Ω open )
2.3- Connect the jumper between TPE3 and ground
2.4- Connect the oscilloscope between TPE27 and
ground.
2.5- Confirm if Picture Menu is DYNAMIC.
2.6- Position the controls at the following positions:
G LOW LIGHT (G-CUT)...125H
BRIGHT..CENTER
CONTRASTNORMAL OR MAX.
COLOUR.MINIMUM
3- CALIBRATION
3.1- Select DAC SUB BRIGHT (SUB BR) CHQ2.
3.2- Adjust SUB BR until you have a level of 2,2±0,1Vp-p
and confirm if there is no deformation of waveform.
3.3- Select DAC SUB-CONTRAST, CHQ2.
3.4- Adjust SUB-CONTRAST level to 2,9±0,1Vp-p at
TPE27, as figure below.
Ajusted by Sub-Contraste
← 2,9 ± 0,1 Vp-p
Pedestal level
Ajusted by Sub-Bright
GND
← 2,2 ± 0,1 Vp-p
Adjusted by Sub-Color
← 2,5±0,1 Vp-p
Pedestal level
Adjusted by Sub-Bright
GND
← 2,2±0,1 Vp-p
SHARPNESS ADJUSTMENT
1- PREPARATION
1.1- Select sharpness control using Menu IMAGE
1.2- Adjust the control SHARPNESS to center.
2- ADJUSTMENTS
2.1- Select DAC SUB-SHARPNESS at CHQ2.
2.2- Adjust SUB SHARPNESS to(*) using the remote
control.
(*)14=17H
(*)20=1BH
2.3- Press key N to exit SERVICE mode.
SHUT DOWN SYSTEM CONFIRMATION
1- REQUIRED EQUIPMENT
1.1- DC power source
1.2- Voltmeter
- 10 -
TC-14B10P / TC-20B10PService Adjustments and Calibrations
2- PREPARATION
2.1- Apply a CROSS HATCH pattern.
2.2- Adjust the controls BRIGHT and CONTRAST until
current turns to zero.
3- CONFIRMATION
3.1- Connect the DC voltmeter to cathode of D591 and
confirm that voltage is lower than level(*)A.
3.2- Adjust the DC power source to level(*)B and confirm
that SHUTDOWN is not acting.
3.3- Adjust the DC power source to level(*)C and confirm
that SHUTDOWN is not acting.
LEVELS 14 (V) 20 (V)
(*)A
(*)B
(*)C
21,60 22,30
23,60 24,10
25,60 26,10
HORIZONTAL WIDTH AND CENTERING
ADJUSTMENTS
1- ADJUSTMENT OF HORIZONTAL CENTERING
1.1- Position the control BRIGHT to minimum.
1.2- Tune to PHILIPS standards.
1.3- Select the DAC of HORIZONTAL CENTERING
(HC) at CHQ3 Service Mode.
1.4- Adjust the HORIZONTAL CENTERING using the
keys VOL(+) OR VOL(-).
2- VERIFICATION OF HORIZONTAL WIDTH
2.1- Verify if horizontal width, is within the specifications
below:
VERTICAL HEIGHT AND CENTERING
ADJUSTMENTS
1- ADJUSTMENTS.
1.1- Tune a Philips pattern.
1.2- Select the DAC of VERTICAL CENTERING at
CHQ3 Service Mode.
1.3- Adjust the vertical placement pressing the VOL(+) or
VOL(_) keys until the image is centered.
Suggestion: the center line of CRT should coincide
with the centerline of PHILIPS pattern).
1.4- Select the DAC VERTICAL ALTITUDE (V ALT) AT
CHQ3 at SERVICE mode.
1.5- Adjust the correct altitude pressing VOL(+) or
VOL(_) keys
WHITE BALANCE PRE ADJUSTMENT AND
CRT CUT OFF ADJUSTMENT
IMPORTANT: This adjustment should be done after 15
minutes heating time.
1- REQUIRED INSTRUMENTS
1.1- Oscilloscope
2- PREPARATION.
2.1- Connect oscilloscope between TPY1 and ground.
2.2- Apply a PHILIPS pattern.
2.3- Confirm if Picture Menu is DYNAMIC
2.4- Confirm if Channel Color is NORMAL
2.5- Confirm Colour Temperature in NORMAL
2.6- Enter Service Mode at CHQ5.
2.7- Position controls at the following positions:
R HIGH LIGHT(R-DR).........40H
B HIGH LIGHT(B-DR)......... 4OH
R LOW LIGHT (R-CUT)..........000H
B LOW LIGHT(B-CUT)........000H
GLOW LIGHT(G-CUT)........125H
SCREEN........MINIMUM
ENGLISH
DIÂMETRO A MODELO
20 polegadas290 ± 5 mm
14 polegadas200 ± 5 mm
3- ADJUSTMENTS
3.1- Press 5 at the remote control to obtain a simple
horizontal line.
3.2- Confirm that the Pedestal level value at pin TPE27 is
2,2±0,1Vp-p.
3.3- Adjust G-CUT to obtain (*A) at TPY1, as figure
below:
(*A) 14 140±2Vp-p
(*A) 20 160±2Vp-p
0 V
3.4- Adjust SCREEN until a first line appears at the
screen, and dont change it after this.
3.5- Adjust the other DACs that correspond to the other
two colours (R-CUT,B-CUT) until line turns white.
3.6- Exit to normal mode pressing the key NORMAL at
the remote control.
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TC-14B10P / TC-20B10PService Adjustments and Calibrations
FOCUS ADJUSTMENT
1- PREPARATION
1.1- Apply a MONOSCOPE or PHILIPS pattern.
1.2- Confirm that Picture Menu is NORMAL DINAMIC
1.3- Adjust the controls to the following positions:
CONTRAST.....MAXIMUM
BRIGHT........... NORMAL
IMPORTANT:SUB BRIGHT adjustment should
have been done before.
2- ADJUSTMENTS
2.1- Adjust the FOCUS meter (FBT) until the best
focalization of image is obtained.
FRONT PANEL CHECKING
1- TV/AV VERIFICATION
1.1- Apply a PHILIPS pattern.
1.2- Press TV/AV button and verify if AV shows up ON
SCREEN
2- VOLUME VERIFICATION
2.1- Press VOL(+) or VOL(_) button and watch for a slight
variation.
2.2- Confirm that indication of volume position change
slightly on ON SCREEN.
3- CONFIRMING THE FUNCTION TURN ON/OFF OF
AC SWITCH
3.1- Turn OFF and turn ON the AC switch. Confirm that
previous memory position is saved. (it shows PHILIPS
pattern).
3.2- Confirm that volume is minimum and the other controls
are on the final adjustment condition.
3.3- Verify if led is on.
FINAL POSITION OF CONTROLS
VOLUME.........MINIMUM
COLOUR................CENTER
BRIGHT.......... CENTER
CONTRAST........MAXIMUM
6- VERIFICATION OF THE FUNC KEY
6.1- Press the FUNC key at the front panel and verify if
the following sequence appears:
AUTOMATIC TUNING
SKIPP CHANNEL OFF
ANTENNA TV
7- HOTEL MODE CONFIRMATION
7.1- Adjust the volume to 15.
7.2- Enter HOTEL MODE. To enter, set OFF TIMER to 30
and press simultaneously CH(+) at the front panel
and RECALL at the remote control.
7.3- Confirm that the MAIN MENU and OFF TIMER are
not operating.
7.4- Confirm that the maximum volume possible is 15
7.5- Exit HOTEL MODE. To exit, press simultaneously
VOL(_) at the front panel and OFF TIMER at the
remote control.
7.6- Confirm that OFF TIMER operates normally.
AV IN TERMINALS CHECKING
1- REQUIRED INSTRUMENTS
1.1- TV pattern signal generator
2- PREPARATION
2.1- The colour adjustment should already been done.
2.1- Set the TV/AV switch to AV position.
3- CONFIRMATION
3.1- Confirm that AV appears on ON SCREEN
3.2- Confirm that image and sound disappears
3.3- Connect the pattern signal generator to the rear AV
input terminal and confirm that noise and image
appears.
3.4- Connect the other source to the front AV input terminal
and confirm that the pattern signal connected to the
rear AV input terminal was substituted by the signal
of front AV input terminal.
3.5- Set the TV/AV switch to TV position.
4- CHECKING THE MICROPROCESSOR
4.1- Press the CH(+) or CH(_) button at the remote control
and confirm that ON SCREEN of the number of
channels previously tuned, up and down.
5- STAND BY OPERATION
5.1- Turn the TV on using the ON/OFF switch.
5.2- Press the ON/OFF button at the remote control to enter
in the STAND BY mode.
5.3- Disconnect and reconnect the power supply cable.
5.4- Confirm if TV set is at STAND BY.
5.5- Press the CH(+) or CH(_) button at the remote control
and verify if the TV turns on.
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TC-14B10P / TC-20B10PService Adjustments and Calibrations
AUTOMATIC AND MANUAL MEMORIZATION
1- VERIFICATION OF AUTOMATIC MEMORIZATION.
1.1- Adjust the input pattern signal level to 40 dB
1.2- Press FUNC at the front panel and it will appear an
indication of AUTOMATIC SINTONY.
Press VOL(+) at the front panel to begin automatic
memorization.
1.3- Verify the following items:
-Channel changes
-Automatic sintony
1.4- When memorization process is over, turn off the TV
using ON/OFF button.
1.5- Turn on the TV again using ON/OFF button and verify
the memorized channels using CH(+) or CH(_).
2- VERIFICATION OF MANUAL MEMORIZATION.
2.1- Press FUNC at front panel until select SKIP channel.
2.2- To add a channel press VOL(+) or VOL(_) until OFF
appears.
2.3- To take one channel out press VOL(+) or VOL(_) at
the set until ON appears.
2.4- To change channels press the CH(+) or CH(_).
AUDIO CHECKING
1- CONFIRMING TONE AND VOLUME
1.1- Apply a pattern signal with sound.
1.2- Confirm that high frequency sound is altered when tone
level is varied at Sound menu.
1.3- Press the VOL(+) or VOL(_) at the remote control and
notice a slight variation.
2- CONFIRMATION OF NOISE MUTE AND
BLUE SCREEN
2.1- Apply a PHILIPS pattern.
2.2- Turn on BLUE-BACK at the FUNC MENU. Confirm if
audio output is normal.
2.3- Eliminate antenna signal or reduce the signal strenght.
Confirm if blue screen appears and audio is cut off.
2.4- Turn off BLUE-BACK at the FUNC MENU. Verify if
blue screen doesnt appear and if sound exist (noise)
2.5- Turn BLUE-BACK again at FUNC MENU.
TUNE CHECKING
1- PREPARATION
1.1- Turn on the TV set using On/OFF switch.
2- VERIFICATION
2.1- Turn on signal at the TV set.
2.2- Press any existing channel number using the remote
control and verify if channel is selected.
2.3- Verify at bands VHF LOW, VHF HIGH, UHF and
CATV.
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