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BUSH 2067 NTX
General Information Also Covers Bush 2027 T Goodmans GTV 211 PT 9601 Chassis X-Ray Radiation Precaution
1. Excessive high voltage can be produce potentially hazardous X-RAY radiation. To avoid such hazard, the high voltage must not be above the specified limit. The nominal value of the high voltage of this receiver is 25KV at zero beam current (minimum brightness) under 220V AC power source. The high voltage must not under any circumstance, exceed 30KV. It is recommended the reading of the high voltage be recorded as a part of the service record. It is important to use an accurate and reliable high voltage meter. 2. The primary source of X-RAY radiation in this TV receiver is the picture tube. For continued X-RAY radiation protection, the replacement tube must be exactly the same type tube as specified in the part list. medium level - Adjust color, contrast, brightness to minimum by RC - Adjust G2 - Apply white pattern, settle in the probe of color analyzer to screen - Increase brightness until geting Y=10 nits - Adjust x=270 - 276 nits y=270 - 276 nits via "VR201, VR203, VR205" - Increase brightness and contrast until Y=90 100 nits - Adjust x, y to same values via "VR202 and VR204" - Check white balance at high and low contrast level. Again make adjustment if it's necessary. IC Data, Pin Functions and Voltages Video Processing Unit With TDA8362 Video and time base is based on the TDA 8362 Multistandard TV Processor( Pal Decoder),TDA 4665 Baseband Delay Line and TDA8395 Secam Decoder. The Features of this Concept: · Multistandard vision IF circuit (positive and negative modulation) · Multistandard FM sound demodulator (4.5 MHz to 6.5 MHz) · External Video and Audio Switches · Integrated chrominance traps and baseband filters · Integrated luminance delay line · RGB control circuit with linear RGB inputs · Horizontal synchronization with two loops and alignment-free horizontal oscillator without external components. · Vertical count-down circuit (50-60 Hz) and vertical preamplifier · Low dissipation · Only one adjustment (vision IF demodulator) PINNING
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
1
Audio deemphasis and +1- mod.switch IF-demodulator tuned circuit IF-demodulator tuned circuit Video identification output Sound IF plus volume control External audio input IF video output Decoupling digital supply Ground Positive supply (8V) Ground Decoupling filter tuning Internal CVBS input Peaking input External CVBS input Chroma + A/V switch input Brightness control input B-output G-output R-output RGB-insertion and blanking R-input for insertion G-input for insertion B-input for insertion Contrast control input Saturation control input Hue control input (or chroma out) B-Y input signal R-Y input signal R-Y output signal B-Y output signal 4.43MHz output for TDA8395 Loop filter burst phase detector 3.58 MHz X-tal connection 4.43MHz X-tal connection Start horizontal oscillator Horizontal output Flyback input / sandcastle output G2 loop filter G1 loop filter Vertical feedback input Vertical ramp generator Vertical output AFC output IF-input IF-input Tuner AGC output AGC decoupling capacitor Tuner take-over adjustment Audio output Decoupling sound demodulator Decoupling bandgap supply PIN VOLTAGE 3V and 0.3Vrms (FM Audio) 6V 6V 5V 0.5V - 4V 4V 2.5V and 2.0 Vpp (Video) 8V 8V 3.25V 4.25V 4V 3.5V 0V(TV)-8V (AV) 1V - 3.5V 2.5V - 4Vpp 2.5V - 4Vpp 2.5V - 4Vpp 0V TV and 1 .5V RGB mode 3.3V and 0.7 Vpp 3.3V and 0.7 Vpp 3.3V and 0.7 Vpp 0V - 3V 0V - 3V 6V 4V 4V 1.5V 1.5V 1 .6V(PAL) 4.5V(SEC) 4.5V 3V 2V 8V 0.6Vp-p 15.6 KHz 6Vpp 3V 375V 2.5V and 1.0Vpp 2.5V and 1.5Vpp 2.5V 4V 4V 4V 3.4V 4.5V 6.5V
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Microcontroller Unit CTV 352 S(for stereo) and CTV 322 (for mono) are a voltage synthesis tuning system with on screen display OSD of all relevant control function. Analog picture settings are controlled by 4 on-chip digital to analog converters. Sound volume can be controlled by the fifth on-chip digital to analog converter in mono only system. Full sound (volume, bass, treble, balance) in German Stereo and Nicam configuration and Teletext can be controlled via the 120 bus using a sound processor and teletext decoder. This controllers can control up to two scart plugs.
PINNING 1 Tuning voltage control output 2 Volume control output 3 Brightness control output 4 Color control output 5 Contrast or hue control output 6 Tone, balance or hue control output 7 Band-switch 0-output 8 Band-switch 1-output 9 Analogue AFC sense input 2-4V 10 Dual/Non Dual language sound input 11 VTR time constant control output 12 Ext/mt. audio/video source control output 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 Keyboard scan line input/output Keyboard scan line input/output Keyboard scan line input/output Keyboard scan line input/output Keyboard scan line input/output Keyboard scan line input/output Keyboard scan line input/output System mode strobe output Ground supply input OSD red output OSD green output OSD blue output OSD fast blanking output Horizontal synchronization input Vertical synchronization input LC oscillator input for OSD LC oscillator output for OSD Test input; connected to ground Oscillator input; 10MHz crystal Oscillator output Power-on reset input/output Horizontal coincidence input RC-5 remote control input Mono/Stereo or language 1/2 output Sound effect control output System select output l2C-bus clock signal output l2C-bus data signal output Standby/On control input/out PIN VOLTAGE 5V - 0V 0 - 5V 0 - 5V 0 - 5V 0 - 5V
TDA 8395 The TDA8395 is a self calibrating fully integrated SECAM decoder.
PINNING 1 Reference frequency input 2 Test output 3 Positive supply voltage 4 Not connected 5 Not connected 6 Ground 7 Cloche reference filter 8 PLL reference 9 -(R-Y) output 10 -(B-Y) output 11 Not connected 12 Not connected 13 Not connected 14 Not connected 15 Sandcastle pulse input 16 Video input PIN VOLTAGE 8V 0V 1V 1.3V 6 Vpp -
Adjustments
1. System Voltage (+B) Adjustment: - Before switching on TV, all potentiometers should be adjusted at medium level. Then TV is switched on; - Adjust all of the analog parameters to minimum with RC - Adjust P1 trimpot until find +115 V on the cathode of D2 diode 2. AFT Adjustment: - Place a balloon coil (300 Ohm dc resistance) parallel to L104 - Apply 80 dB uV 38.9 MHz (39.5 MHz for I) signal via balloon coil - Connect a voltmeter to aft pin (pin 9) of IC301 - Adjust T101 coil until the voltage of this pin being 2.5 V dc 3. Adjustment of G2: - Apply Philips Test pattern - Adjust all of the analog parameters to minimum with RC - Adjust G2 trimpot until seeing two bars on gray scale 4. Horizontal and Vertical Adjustment: - Apply Philips Test pattern signal - Center the picture horizontally while picture shifting to right and left with P101, - Make vertical amplitude adjustment with P602 until seeing top and lower lines of picture will be seen. - Center the picture with P601 5. AGC Adjustment: - Apply Philips Test Pattern whose amplitude is 60 dB uV to the rf input - Adjust P102 until find a picture without snowy 6. Focus Adjustment: - Apply Cross-Hatch Pattern signal - Find the optimum concentration point between H and V intersection in the middle of screen. 7. White Balance Adjustment: - Apply Philips Test Pattern signal - Adjust all of the trimpots on CRT board to
TDA 4665 The TDA4665 is an integrated baseband delay line circuit. It provides a delay of 64 us for the color difference signals. (R-Y) and (B-Y), in multi-standard TVs.
PINNING 1 Digital supply voltage 2 Not connected 3 Digital ground 4 Test input 5 Sandcastle input 6 Not connected 7 Test input 8 Test input 9 Analog supply voltage 10 Analog ground 11 -(R-Y)output 12 -(B-Y)output 13 14 15 16 Reference current -(B-Y) input Not connected -(R-Y)input PIN VOLTAGE 5V 0V 0V 5V 3.25V 3.25V 1.35V 1.35V
5V (TV) 0V(AV) 5V 4.5Vpp 4.5Vpp 4.5Vpp 4.5Vpp 5Vpp HF 5Vpp HF 5V 5V 2V 5V 4.5V 4V
Block diagram
Block diagram of PCA84C641
Block Diagram
42 +5V supply voltage input
5V 5V 0V 5V 5V
& 5Vpp & 5Vpp (ST-BY) (Open)
Block diagram of PCA84C841
BUSH 2067 NTX
IC Data, Pin Functions and Voltages Cont'd
Power Supply With TDA4605 The IC TDA4605 controls the MOS power transistor and performs all necessary regulation and monitoring functions in free running flyback converters. Features · Overload protection · Burst operation under short circuit conditions · Loop error protection · Switch-off if line voltage is too low · Line voltage compensation of overload point · Soft start for quite start up · Chip over temperature protection · On-chip parasitic transformer oscillation suppression circuit Pin Definitions and Functions Pin No. 1 and Function Information Input Concerning Secondary Voltage By comparing the regulating voltage - obtained trom the regulating winding of the transformer with the internal reference voltage, the output impulse width on pin 5 is adjusted to the load of the secondary side (normal, overload, shortcircuit, no load). Pin No. 2 and Function Information Input Regarding the Primary Current The primary current rise in the primary winding is simulated at pin 2 as a voltage rise by means of external RC-element. When a voltage level is reached thats derived from the regulating voltage at pin 1, the output impulse at pin 5 is terminated. The RC-element serves to set the maximum power at the overload point set. Pin No. 3 and Function Input for Primary Voltage Monitoring In the normal operation V3 is moving between the thresholds V3H and V3L (V3H > V3 > V3L)V3 V3H Compensation of the overload point regulation (controlled by pin 2) starts at V3H :V3L= 1.7. Pin No. 4 and Function Ground Pin No. 5 and Function Output Push-pull output provides ±1 A for rapid charge and discharge of the gate capacitance of thb power MOS-transistor. Pin No. 6 and Function Supply Voltage Input A stable internal reference voltage VREF is derived from the supply voltage also the switching thresholds V6A, V6E, V6 max and V6 mm for the supply voltage detector. If V6 > V6E then VREF is switched on and swiched off when V6 PINNING 1 DC volume control 1 2 Not connected 3 Voltage input 1 4 Positive supply Voltage 5 Voltage input 2 6 Signal ground 7 DC volume control 2 8 Positive output 2 9 Power ground 2 10 Negative output 2 11 Negative output 1 12 Powerground 13 Positive output 1 PIN VOLTAGE 1.0V 12.5 1.5Vpp 1.0V -
2
TDA 4605-3
PINNING 1 2 3 4 5 6 7 8 Information Input Concerning Secondary Voltage Information Input Regarding the Primary Current Input for Primary Voltage Monitor Ground Output Supply voltage Input Input for Soft-Start and Integrator Circuit Input for the Feedback of the Oscillator PIN VOLTAGE ST-BY 0.4V 1V 2.1V 0V 0.8V 12V 1.1V 0.3V NORM. 0.4V 1.2V 2V 0V 8V (10Vpp) 12.8V 1.9V 0.4V
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TDA 7056A
PINNING 1 Not connected 2 Positive supply voltage 3 Voltage input 4 Signal ground 5 DC volume control 6 Positive output 7 Power ground 8 Negative output 9 Not connected PIN VOLTAGE 12.5V 1.0Vpp 1.0V
TDA 9830 The TDA9830, is a monolithic integrated circuit, is designed for AM sound demodulation used in L and V standard. The IC provides an audio source selector and also mute switch. Features · Adjustment free wideband synchronous AM demodulator · Audio source mute switch · Audio level according EN50049 · 5V to 8V power supply or 12V alternative · Low power consumption TDA 9830
PINNING PIN VOLTAGE 1 Sound IF differential input signal 2 Not connected 3 AGC capacitor 4 REF voltage filtering capacitor 5 Not connected 6 AM demodulator output 0.5Vpp 7 Input signal (from AM) to audio switch 0.5Vpp 8 Output signal from audio switch 0.5Vpp 9 Input signal (from external) to audio switch 0V (int) -5(ext) 10 Switch input select control 12V 11 Supply voltage +12V (alternative) 12 Mute control 13 Ground (0V) 0V 14 Supply voltage +5 to +8V 15 Not connected 16 Sound IF lifferential input signal
(See Block Diagram) Sound IF Circuit On L system, TDA 9830 is used as AM Demodulator on mono TV sets, TDA 4470B is used for Nicam sound intercarrier and AM Demodulator on stereo TV sets with suitable SAW filters. On BG and I systems, TDA 3845 is used for sound intercarrier with a SAW filter on Nicam TV sets. On German Stereo models, TBA 120U is used as FM demodulator for stereo sound carrier. TDA4470B The TDA4470B is an integrated bipolar circuit for multistandard video/sound IF signal processing in TV/VCR and multimedya applications.
PIN VOLTAGE VHF1 VHF3 12 0 0 12 0 5V 0 0 13.5 13.5 0 0 0 0 12 12 UHF 0 0 0 5V 13.5 12 0 12
LA 7910
PINNING 1 2 3 4 5 6 7 8 9 Output Output Input Input Ground Supply voltage (18V) Output Output Supply voltage (12V DC)
Features · 5 V supply voltage, low power consumption · Active carrier generation by FPLL principle for true synchronous demodulation · Very linear video demodulation, good pulse response and excellent intermodulation figures · VCO circuit is operating on picture carrier frequency, the VCO frequency is swithcable for the L' mode · Alignment free AFC without external reference circuit, polarity of the AFC curve is switchable · VIF AGC for negative modulated signals and for positive modulation · Tuner AGC with adjustable take over point · Alignment free quasi parallel sound (QPS) mixer for FM/NICAM sound IF signals · Intercarrier output signals is gain controlled · Complete alignment free AM demodulator with gain controlled AF output · Separate SIF AGC with average detection · Two independent SIF inputs Parallel operation of the AM demodulator and QPS mixer (for NICAM L stereo sound) TDA 4470-B
PINNING PIN VOLTAGE 1 SIFi input (symmetrical) 2 SIFi input (symmetrical) 3 Input selector switch 4 Ground 5 SIF-AGC (time constant) 6 VIF input (symmetrical) 7 VIF input (symmetrical) 8 VIF-AGC (time constant) 10 Take over point, tuner AGC 11 Tuner AGC output current 12 Video output 13 Standard switch 14 L' switch 15 Black level capacitor 16 Ground 17 Internal reference voltage 18 Loop filter 19 AEC switch 20 VOC circuit 21 VCO circuit 22 AFO output 23 Supply voltage 24 Intercarrier output 25 AE output - AM sound 26 Offset compensation 27 SlF2 input (symmetrical) 28 SIF2 input (symmetrical) 0V - 5V 0V 0V-5V 0V-5V 0V -
TDA3845 The TDA3845 is a quasi split -sound IF circuit which is designed to provide high performance television FM/AM sound. Features · Gain controlled wide band IF amplifier · High precision internal 90' phase shifter for quadrature demodulator · Amplitude detector for gain control which operates as a peak detector for FM sound and as a mean level detector for AM sound (switchable) · In-phase wideband synchronous demodulator for AM detection · Stabilizer circuit for ripple rejection and constant output signals · ESD protection for all pins · Suitable for all FM standards and L as well as L- accent standard · NICAM compatible
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BUSH 2067 NTX
IC Data, Pin Functions and Voltages Cont'd
TDA 3845
PINNING 1 IF amplifier input 2 2 Not connected 3 AGC control capacitor 4 Optional capacitor (see note 10 to the characteristics) 5 Peak/mean detector capacitor 6 AM output 7 EM/AM switch 8 LC reference circuit for the picture carrier 9 LC reference circuit for the picture carrier 10 Not connected 11 Positive supply voltage 2 (+12V); note 1 12 Intercarrier output 13 Ground(0V) 14 Positive supply voltage 1 (+5V) 15 Not connected 16 IF amplifier input 1 PIN VOLTAGE 1.0Vpp 0Vpp on the RGB pins 19 Dot rate fast blanking output 20 Ground 21 Programmable output to provide contrast reduction of the TV picture formixed text and picture displays or when viewing newflash/ subtitle pages open drain output 22 25Hz output synchronized with the CVBS input's field sync pulses to produce a noninterlaced display adjustment of the vertical deflection currents 23 Dot rate character output of teletxt foreground colour information; open drain output 24 Serial clock input for the I2C bus. It can still be driven during power-down of the device 25 Serial data port for the I2C bus open drain output. It can still be driven during power-down of the device 26 To 40 internally connected. Must be left open-circuit in application
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PCF84C81 (CTV 974)
0V PIN VOLTAGE With Text Without Text 1 4-bit I/O Port Bit 2 (P2.2) 5V 5V 2 4-bit I/O Port Bit 3 (P2.3). 4.4V 4.4V 3 Bidirectional Clock for Serial I/O 4.4V 4.4V 4 8-bit I/O Port Bit 0 (P0.0) 5V 5V 5 8-bit I/O Port Bit 1 (P0.1) 5V 5V 6 8-bit I/O Port Bit 2 (P0.2) 0V 0V 7 8-bit I/O Port Bit 3 (P0.3) 4.18V 0V 8 8-bit I/O Port Bit 4 (P0.4) 5V 5V 9 8-bit I/O Port Bit 5 (P0.5) 0V 0V 10 8-bit I/O Port Bit 6 (P0.6) 5V 5V 11 8-bit I/O Port Bit 7 (P0.7) 0V 0V 12 Interrupt input / Test Input 0 0.2V 0V 13 Test Input 1 0.2V 0V 14 Ground 0V 0V 15 Oscillator Input 2.46V 2.46V 16 Oscillator Output 2.46V 2.46V 17 Reset Input 5V 0V 18 8-bit I/O Port Bit 0 (P1.0) 5V 5V 19 8-bit I/O Port Bit 1 (P1.1) 5V 5V 20 8-bit I/O Port Bit 2 (P1.2) 0V 5V 21 8-bit I/O Port Bit 3 (P1.3) 0V 0V 22 8-bit I/O Port Bit 4 (P1.4) 5V 5V 23 8-bit I/O Port Bit 5 (P1.5) 0V 0V 24 8-bit I/O Port Bit 6 (P1.6) 5V 5V 25 8-bit I/O Port Bit 7 (P1.7) 0V 0V 26 4-bit I/O Port Bit 0 (P2.0) 5V 5V 27 4-bit I/O Port Bit 1 (P2.1) PINNING
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STV 5346A
PINNING 1 Composite Video Signal Input through Coupling Capacitor 2 Master/Slave Selection Mode 3 +5V 4 STTV/LFB/FFB Polarity Selection 5 Composite Sync Output.Line Flyback Input 6 Field Flyback Input 7 Digital Ground 8 Video Red Signal 9 Video Green Signal 10 Video Blue Signal 11 DC Voltage to define RGB High Level 12 Fast Blanking Output TTL Level 13 Open Drain Contrast Reduction Output 14 25Hz Output Field synchronized for non-interlaced display 15 Open Drain Foreground Information Output 16 Serial Clock Input 17 Serial Data Input/Out ut 18 To be connected to VssD 19 To be connected to VssD 20 To be connected to VssD 21 PLL Time Constant Selection 22 +5V 23 Oscillator Output 13.875Mhz 24 Oscillator Output 13.875 Mhz 25 Oscillator Ground 26 Analog Ground 27 Grounded to VssA 28 To connect Black Level Storage Capacitor 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Demodulator Vss VCO control voltage input Demodulator VCO control voltage input Mixer voltage reference DQPSK input Cosine channel offset compensator capacitor Cosine channel eye pattern output AGC peak detector storage capacitor Internal demodulator reference voltage buffered output Internal demodulator reference current output Internal demodulator reference voltage unbuffered output Demodulator V DD Demodulator V SS Not connected Clock loop phase comparator output 8.192MHz X-tal input 8.192MHz X-tal output X-tal oscillator Vss Data input (Serial - 728 kbitsls) Data output (Serial - 728 kbitsls) Clock output (728khz) Digital VSS Digital VDD Data output (Serial - 728 kbits/s) Clock input (for I2C) Data input/output (for I2C) I2C address bit 0 input I2C bus bit (controlled from PORT2) 0V 2.5V 5.8V 5V 2.4V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 5V 0V 2V 3.1V 2.5V 0V 2.5V 0V 0.5V 5V 5V 2.5V 5Vpp 5Vpp 0V 5V
-
5Vpp
5Vpp -
12V 0V
SAA 7283
PINNING PIN VOLTAGE 1 Mute in ut 5V 2 Digital audio interference output 2.54V 3 Audio VDD 5V 4 Audio V-SS 0V 5 Internal audio reference voltage buffer 2.5V 6 External analogue input (Right) 0.3V 7 Fm sound input (Right) 2.5V 8 Analogue output (Right) 2.5V 9 9 Not connected 0V 10 Not connected 0V 11 Internal audio reference voltage buffer output 2.5V 12 Quit VSS to DACs 0V 13 Not connected 0V 14 Not connected 0V 15 Analogue audio output (Left) 2.5V 16 FM sound input (Left) 2.5V 17 External analogue input (Left) 0.4V 18 Power-on reset mute 5V 19 Power-on reset audio select 20 Carrier loop filter connection 21 Carrier loop filter output 22 Sine channel eve pattern output 23 Sine channel offset compensator capacitor 2.5V
TBA120U The TBA120U is an IF amplifier with a symmetrical FM demodulator and an AF amplifier with adjustable output voltage. TBA 120U
PINNING 1 Ground 2 Mute 3 Input resistance 4 Supply current and the reference 5 Adjustment voltage 6 IF output voltage 7 Tank to reference 8 Adjustable output 9 Tank to reference 10 IF output voltage 11 Positive supply 12 De-emphesize out 13 SIF input 14 SIF input PIN VOLTAGE 0V
Stereo Part TDA 9840 is used as German Stereo decoder and SAA 7283 is used Nicam decoder via I2C bus interface. On outputs of G/S and Nicam decoder IC's, TDA 8425 sound processor is used . Also this IC controls via I2C bus. TDA 9840
PlNNING PIN VOLTAGE 1 PC-bus data input/output 5 Vpp 2 AGC capacitor of pilot frequency amplifier 3 Identification low-pass capacitor 4 DC loop capacitor 5 Pilot frequency input input voltage 6 Capacitor of reference voltage (1/2 Vp) 2.5V 7 AF input signal Vi1 (from 1st sound carrier) 0.25Vpp 8 AF input signal Vi2 (from 2nd sound carrier) 0.25Vpp 9 AF input signal Vi3 (NICAM or AM sound (standard L) 10 AF input signal Vi4 (NICAM) 11 AF output signal Vo4 (SCART) 1.0 Vpp 12 AF output signal Vo3 (SCART) 1.0 Vpp 13 AF output signal Vo2 (main) 0.5 Vpp 14 AF output signal Vo1 (main) 0.5 Vpp 15 50 us de-emphasis capacitor of AF Channel 1 16 Ground 0V 17 50 us de-emphasis capacitor of AF Channel 2 18 Supply voltage (+5 to +8V) 5V 19 10 MHz crystal input 20 PC-bus clock input 5V
12V 0.5Vpp
TELETEXT PART Simple text stage consists of SAA 5254 Teletext decoder. This IC is controlled via 120 bus. Basically fastext stage consists two IC's, STV 5346 Teletext decoder and CTV 974 Fastext controller with 120 bus interface. For List Mode a 2K EEPROM (PCF8582) can be added. SAA 5254
PINNING PIN VOLTAGE 1 + 5V supply 2 27 MHz crystal oscillator output 3 27 MHz crystal oscillator input 4 0V crystal oscillator ground 0V 5 0V ground 0V 6 Positive reference voltage for the ADC. 5V 7 Video black level storage pin, connected to ground via a 100 nF capacitor 8 Composite video input pin 9 Reference current input pin, connected to ground via a 27kohm resistor 10 +5V supply 5V 11 STTV/FB/FFB polarity selection pin 12 Sync to TV output pin/line flyback input pin. Function controlled by an internal register bit (scan sync mode) 13 PLL time constant switch/field flyback input pin. Function controlled by an internal register bit (scan sync mode) 14 0V ground 0V 15 Dot rate character output - RED color info. 16 Dot rate character output - GREEN color info. 17 Dot rate character output - BLUE color info. 18 DC input voltage to define the output high level
Biplar TV/VTR Stereo Decoder Block Diagram
TDA 8425
PINNING 1 Input 2 (Left) 2 External decouplage capacitor (VCAP) 3 Input 2 (Right) 4 Supply voltage 5 Ground 6 Bass (Right) 7 Bass (Right) 8 Treble (Right) 9 Output (Right) 10 Ground 11 Voltage Range 12 Voltage Range 13 Output (Left) 14 Treble (Left) 15 Bass (Left) 16 Bass (Left) 17 External capacitors 2 18 Input 1 (left) 19 External capacitor 1 20 Input (Right) PIN VOLTAGE 5.83V 11.66V 5.84V 11.76V 0V 5.84V 5.85V 5.85V 5.85V 0V 4.3V 4.3V 5.85V 5.85V 5.85V 5.84V 5.84V 5.83V 5.83V 5.83V
BUSH 2067 NTX
IC Data, Pin Functions and Voltages Cont'd
Vertical Deflection Circuit With TDA3653B The TDA3G53B is a vertical deflection output circuit for drive of various deflection systems with current up to 1.5 A peak to peak. Features · Driver · Output Stage · Thermal Protection · Flyback Generator · Voltage Stabilizer · Guard Circuit TDA 3653B
PINNING 1 Output Stage Driver Input 2 Ground 3 Switching Circuit Input 4 Output Stage Ground 5. Output Voltage 6 Supply Voltage for the Output Stage 7 DC Voltage produced by the Guard Circuit 8 Flyback Generator Output 9 Supply Voltage PIN VOLTAGE 1 .2V and 2Vpp 1 .2V and 2Vpp 13V and 45Vpp 26V 8V 26V
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Troubleshooting Guides
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Video Output Amplifier On CRT Board, TDA 61030 is used as video output amplifier. The TDA 61030 includes three video output amplifier intended to drive the three cathodes of color CRT. Features · High Bandwith 7.5 Mhz typical · High slew rate:1600 V/us · Simple application with a variety of color decoders · Only one supply voltage needed · Internal protection against positive appearing ORT flashover discharges · One non-inverting input with a low minimum input voltage of 1V · Thermal protection · Controllable switch-off behavior TDA 61030
PINNING 1 Inverting input 1 2 Inverting input 2 3 Inverting input 3 4 Ground, fin 5 Non-inverting input 6 Supply voltage 7 Cathode output 3 8 Cathode output 2 9 Cathode output 1 PIN VOLTAGE 1.0Vpp 1.0Vpp 1.0Vpp 1.8V 180V 90Vpp 90Vpp 90Vpp
TROUBLE No color No vertical deflection Vertical linearity Vertical size Vertical shift Horizontal linearity Horizontal size Flue picture Dark picture Noise picture Vert/horizontal synchrony Interference No sound Low sound Sound distortion Contrast Brightness Color saturation Tuning Memory Band select No video-out on the SCART No video-in on the SCART No sound out on the SCART No sound in on the SCART No remote control reception
CHECK POINTS IC 101, EM 102, C127,IC 102, check pin 38-SSC Check +K, IC 601, pin 42 IC 401, pin 43 IC 401 C 625, R 623 C 625, R 624 R 626, P 601 L 601, C 608 +B, C 607, L 602 IC 101 pin 25, ABL, FOCUS, HEATER, EHT IC 101 pin 17, SCREEN, EHT, +M EM 101, AGC, IF, Fl 101 IC 401 EM 101, IF, Fl 101 Check IC 101 pin 5 and pin 50, IC 401 pin 3, pin 5, +G IC 101 pin 5, pin 50, IC 401 pin 5, +G, R 403 IC 401, +G, R 403 IC 301 pin 5, IC 101 pin 25, ABL IC 301 pin 3, IC 101 pin 17 IC 301 pin 4, IC 101 pin 26 IC 301 pin 1, Q301, +D, EM 101 IC 302, IC 301, SDA, SCL IC 301 pin 7/8, IC 303, +K, EM 101 Check TV-VID signals, Q651 Check IC 301 pin 12, IC 101 pin 16 on AV mode, check the video signals on AV mode SCART pin 20 and IC 101 pin 15 IC 101 pin 1, Q653, Q654 Check the audio signals on SCART pin 2/6 & IC 101 pin 6 Check signals on pin 3 EM 302 and IC 301 pin 35
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Fastext Diagram
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Remote Control Diagram
SMPS Diagram
German Stereo Diagram
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CRT Diagram
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CRT Differences Table
COMPONENT CRT 20" SAMSUNG A48ECR11X60 20" SAMSUNG A48ECR 11X60 21" SAMSUNG A51EER 11X38 20" POLCOLOR A48EEV 13X01 21" POLCOLOR A51EEV 13X01 20" VIDEOCOLOR A48EBV 13X011 21" VIDEOCOLOR AS1EBV 13X09
C 607
R 647
L 602
C 608
R 153
8.2NF 1600V 8.2NF 1600V 7.8NF 1600V 7.8NF 1600V 6.8NF 1600V 7.8NF 600V 6.8NF 1600V
0.1R 1W 0.1R 1W 0.1R 1W 0.1R 1W 0.1R 1W 0.1R 1W 0.1R 1W
JUMPER JUMPER JUMPER JUMPER 56uH 56uH 110uH 110uH 110uH 110uH 110uH 110uH 56uH 56uH
470NF 200V 470NF 200V 470NF 200V 470NF 200V 470NF 200V 470NF 200V 470NF 200V
15K 1/6W 15K 1/6W 15K 1/6W 15K 1/6W 15K 1/6W 15K 1/6W 15K 1/6W
Double Scart Diagram Nicam Diagram
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Main Diagram
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