Order DCS - AGO2002 - 003 - MS Service Manual Color Television TC-14A12P TC-20B12 BR2L chassis Specifications TELEVISION TC-14A12P TC-20B12 Power source 110/220 V AC, 60 Hz automatic switch 110/220 V AC, 60 Hz automatic switch Consumption 55 W 69 W Antenna input jack 75 W - VHF/UHF/Cable 75 W - VHF/UHF/Cable Color systems NTSC/PAL-N/AUTO/PAL-M NTSC/PAL-N/AUTO/PAL-M Tuning system F.S.T. F.S.T.
TC-14A12P / TC-20B12 WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technician individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repared only by experienced professional technicians.
Location of Controls (TC-20B12) ENGLISH Back view Front view Operation Guide Front view Location of Controls (TC-14A12P) Back view Power cable -3- AUDIO Antenna input jack POWER Antenna input jack VIDEO Power supply cord output Audio/video input jack Audio/video input jack VIDEO AUDIO FUNC TV/AV – + AV/IN POWER Power switch FUNC TV/AV VOLUME CHANNEL Earphone output Remote control sensor Audio/Video input Power switch (FUNC) function button Stand by indicator Channel Down ( )
ENGLISH REMOTE CONTROL Operation Guide Remote Control Installing the Batteries 1. Remove the battery compartment cover from the back of the remote control, by pressing the lock down and pulling the cover out. 1 2. Install the batteries in the compartment (polarities (+) and (-) must be correct). R-TUNE MUTE POWER TV/VCR CHANNEL SELECTION TIMER VOLUME 3. To replace, fit both cover lugs into the compartment slots and press the lock to close.
ENGLISH Outdoor Antenna Connection For proper sound and picture reception, an outdoor antenna, a proper cable (75 ohms coaxial cable or 300 ohms twin cable) and an appropriate terminal (75 ohms) are required. Your local service representative can help you obtain the adequate system and accessories for antennas.
5 2 8 4 10 3 ENGLISH 6 1 Press these buttons to adjust the listening level. 5. Note: A numerical and graphic indication will be displayed. The numerical indication ranges from zero (no sound) to 63 (maximum level). TV/A V Button TV/AV Press this button to select TV or video input. 7 13 11 9 14 6. Mute Button ( ) Press this button to quickly reduce sound level. Press it again to restore sound. The mute indicator (red) will be displayed. Power Button (O stand by mode) 1.
ENGLISH PICTURE MENU Button 9. PIC MENU Press this button to select the picture menu sequentially, as shown below: On screen Function DYNAMIC For bright places. This setting selects a higher level of brightness and contrast. STANDARD For places with normal levels of luminosity. This setting selects a normal level of brightness and contrast. SOFT For dark places. This setting selects a reduced level of brightness and contrast. 1. Press the WAKE-UP button.
Select Icon Screen indication PICTURE SOUND IDIOMA FEATURES PRESET PORTUGUÊS ESPAÑOL ENGLISH ENGLISH Press Channel Selection Select the most familiar channel visualization pattern.
POWER FUNC TV/AV VOLUME CHANNEL OR “Remote control” Channel Selection Mode 1. FUNC MAIN MENU Press the FUNC (Function) button and select CH SELECT (Channel selection) in the PRESET menu. Press the MAIN MENU button and by pressing the navigation buttons, select PRESET and then CH SELECT (Channel selection). PRESET CH SELECT ANTENNA AUTO TUNE MANUAL TUNE COLOR SYS FINE TUNE SKIP POSITION CABLE -9FUNC MAIN MENU Press the FUNC (Function) button until the setup menu is no longer displayed.
MAIN MENU POWER FUNC TV/AV VOLUME CHANNEL OR ENGLISH Auto Tuning Mode Manual Tuning Mode MAIN MENU POWER FUNC TV/AV VOLUME CHANNEL OR “Remote control” 1. FUNC MAIN MENU 2. Press the FUNC (Function) button and select AUTO TUNE in the PRESET menu. Press the MAIN MENU button and by pressing the navigation buttons, select PRESET and then AUTO TUNE (Auto tuning). Press the VOLUME button to start auto tuning. AUTO TUNE (Auto turning) screen 5 CH 5 “Remote control” 1.
MAIN MENU POWER FUNC TV/AV VOLUME CHANNEL OR “Remote control” In normal reception conditions, this feature should not be used. However, in areas where reception is poor, or if constant interference occurs, it may improve picture and sound quality. 1. 2. CHANNEL FUNC MAIN MENU Press the CHANNEL button to select a channel. Press the FUNC (Function) button and select FINE TUNE (Fine tuning) in the PRESET menu.
ENGLISH MAIN MENU POWER FUNC TV/AV VOLUME CHANNEL Picture Menu OR “Remote control” 1. FUNC MAIN MENU 2. Press the FUNC (Function) button and select COLOR SYS in the PRESET menu. Press the MAIN MENU button and by pressing the navigation buttons, select PRESET and then COLOR SYS. Press the VOLUME button repeatedly to select the desired system.
Supplementary Remote Control Operations ENGLISH Sound Menu Features Menu To select functions vertically or horizontally, press the navigation buttons. BLUE BACK (Blue screen) When this feature is activated, the screen will turn blue if there is no input of a TV station signal, when the signal is weak, or when the picture is excessively snowy. To avoid excessive noise, sound level is reduced to zero. Press the navigation button ( / ) to select ON Ö OFF.
ENGLISH This feature will function only when: 1. Mode/CC feature is OFF. 2. The MUTE button ( ) is pressed on the remote control. Press the navigation button ( / ) to select an option as shown below: Ö Õ C1 Ö C4 Ö SIGNALS Picture Check Sound C2 Antenna location and/or connection Ö Õ NO Before you call for service, determine the symptoms and make a few simple checks, as shown below.
TC-14A12P / TC-20B12 IC601 (TDA9381PS/N2/3) - Pins and Functions - 15 -
TC-14A12P / TC-20B12 IC601 - Pins and Functions Nome Nº P1.3/T1 P1.6/SCL P1.7/SDA P2.0/TPWM P3.0/ADC0/PWM0 P3.1/ADC1/PWM1 P3.2/ADC2/PWM2 P3.3/ADC3/PWM3 VSSC/P P0.5 P0.
TC-14A12P / TC-20B12 IC601 - Pins and Functions Nome Nº BLKIN RO GO BO VDDA VPE VDDC OSCGND XTALIN XTALOUT RESET VDDP P1.0/INT1 P1.1/T0 P1.2/INT0 Descrição 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 black current input / (V-guard input, note 2) Red output Green output Blue output analog supply of Teletext decoder and digital supply of TV-processor (3.3 V) OTP Programming Voltage digital supply to core (3.
TC-14A12P / TC-20B12 IC601 - Block Diagram - 18 -
TC-14A12P / TC-20B12 General Summary CONFIGURATION COLOUR SYSTEM PAL-M / NTSC / PAL-N (PAL-M 50Hz) POWER SOURCE CA Automatic Voltage Selection 110 - 240V AC, 60Hz MEMORY 100 positions TUNING RANGE 181 channels On Screen Display Language English / Spanish / Portuguese Áudio System Mono Vertical Magnetic Field -0.1 ±0.03 (BRASIL) Colour Temperature TC-14A12P: (High Light) x= 0.260±0.01, y=0.265 ±0.01, Y=300 (nit) (Low Light) x= 0.243±0.01, y=0.255 ±0.01, Y=6.
TC-14A12P / TC-20B12 Service Adjustments and Calibrations TO EXIT SERVICE MODE AND RETURN TO THE NORMAL STATE: TO ENTER IN THE SERVICE MODE: 1. Adjust the volume for the minimum. 2. Adjustment the “OFF TIMER” function for 30 minutes. 3. Simultaneously press the “RECALL“ button of the remote control unit and the “VOLUME DOWN“ button on the TV set. After some seconds, the TV enters the SERVICE MODE and the “CHK1” expression should appear on the screen.
TC-14A12P / TC-20B12 Service Adjustments and Calibrations TEST EQUIPMENT ANODE AND HEATER VOLTAGE CONFIRMATION To do all of these electrical adjustments, the following equipment is 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 Volt Meter) • MTS/SAP Signal Generator • (TV Multi-Channel Sound Modulator (U.S.A.
TC-14A12P / TC-20B12 Service Adjustments and Calibrations NTSC SUB-TINT CALIBRATION WHITE QUALITY CALIBRATION 1. PREPARATION: 1.1. Connect the oscilloscope to TPL1 (R OUT) in serie with a 10KΩ resistor. 1.2. Receive a rainbow pattern through VIDEO IN. 1.3. Adjust “IMAGE” to DYNAMIC NORMAL. 1.4. Adjust “COLOR FOR CHANNEL” to NORMAL. 1.5. Set the CHK2 service mode option, press “5” on the remote control unit and confirm that OSD becomes blue (AKB turned off). 1.6.
TC-14A12P / TC-20B12 Service Adjustments and Calibrations 5. VERTICAL HEIGHT (V-AMP 50HZ) CALIBRATION 5.1. Receive a PAL-N Philips pattern. 5.2. Adjust V-AMP-50Hz so that the Philips pattern’s circle height be the same dimension of the width. 6. VERTICAL HEIGHT (V-AMP 60HZ) CALIBRATION 6.1. Receive a monoscope pattern. 6.2. Adjust V-AMP-60Hz so that: [C] and [D] (see below) be 1.9~2.2 (typical 2.0) for 14 inches and 1.5~2.0 for 20 inches. [A] and [B] be 1.5~2.3 (typical 2.0) for 14 inches and 1.5~1.
TC-14A12P / TC-20B12 Service Adjustments and Calibrations COLOR PURITY ADJUSTMENT CONVERGENCE CALIBRATION 1. Position the CRT face turned to east or west. 2. Set Bright and Contrast controls to their maximum positions. 3. Leave the set heating up for 60 minutes at white screen. 4. Fully degauss the picture tube by using an external degauss coil. 5. Apply a red pattern. 6. Loose a clamp screw for the deflection yoke and move it forward or backward until a uniform red screen is obtained. 1.
TC-14A12P / TC-20B12 EEPROM - Memory Maps EEPROM X A0 address (0XX) 00 01 02 03 04 05 06 07 08 09 0A 0B EEPROM X A4 address (2XX) 0C 0D 0E 0F 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 00 02 00 A5 5A 00 01 00 00 00 08 00 04 00 00 01 00 10 00 06 06 00 06 07 00 06 08 00 06 09 00 06 0A 00 10 00 00 00 00 00 00 00 00 20 00 00 00 00 00 00 00 20 06 0B 0
TC-14A12P / TC-20B12 Main Board Schematic Diagram - TC-14A12P / TC-20B12 - 26 -
TC-14A12P / TC-20B12 CRT - Board Schematic Diagram - 27 -
TC-14A12P / TC-20B12 Main Board Conductor View (left / component side) 6 5 4 3 2 1 A B C - 28 - D
TC-14A12P / TC-20B12 Main Board Conductor View (right / component side) 6 5 4 3 2 1 A B C - 29 - D
TC-14A12P / TC-20B12 Main Board Conductor View (left / foil side) 6 5 4 3 2 1 A B C - 30 - D
TC-14A12P / TC-20B12 Main Board Conductor View (right / foil side) 6 5 4 3 2 1 A B C - 31 - D
TC-14A12P / TC-20B12 Waveform All the waveforms had read with 127V power source and receiving a colorbar pattern.
TC-14A12P / TC-20B12 IC601 Pino 42 Pino 51 Pino 52 Pino 53 Pino SCL Pino SDA TNR001 - 33 -
TC-14A12P / TC-20B12 IC801 Pino 01 (tensão de rede: 127V) IC451 Pino 01 (tensão de rede: 220V) X101 Pino 01 Pino 02 Q501 Q551 Coletor Coletor - 34 -
TC-14A12P / TC-20B12 Parts Location - 35 -
TC-14A12P / TC-20B12 Packing and Acessories 30 31 29 Replacement Mechanical Parts List Ref.No.
TC-14A12P / TC-20B12 Replacement Electrical Parts List Ref. No.
TC-14A12P / TC-20B12 TC-20B12 TC-20A12P ECA1CM101B ECJ2VC1H561K ECJ2VC1H561K ECJ2VB1H103J ECJ2VB1H103J ECA1CM101B ECJ2VC1H561K ECJ2VC1H561K CAP. ELETROL. 100 µF 16,0 V CAP. CER. SMD 560 PF 50,0 V CAP. CER. SMD 560 PF 50,0 V CAP. CER. SMD 10 nF 50,0 V CAP. CER.
TC-14A12P / TC-20B12 Ref. No.
TC-14A12P / TC-20B12 TC-20B12 Ref. No.
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