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Summary of Contents for Parker TU2191
- Page 1 TU2191 Frequency Synthesis Color TV Maintenance Manual...
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Page 2: Table Of Contents
Table of Contents I. Introduction of Whole Machine Functions II. Main Technical Specifications III. System Constitution Block Diagram IV. Pin Assignment Table and IC Pin Function Description V. Remote Control Part (Key Value Table) VI. Circuit Principle Analysis VII. Main IC Introduction VIII. -
Page 3: Introduction Of Whole Machine Functions
I. Introduction of Whole Machine Functions This device adopts Toshiba’s latest I C bus control 2-in-1 dedicated decoding chip TMPA8899-XXXX solution for color TVs to provide I C bus control and frequency synthesis PLL tuning method. Major functions of the device are as follows: 1. -
Page 4: System Constitution Block Diagram
RF system PAL-M/N . NTSC-M Video system PAL-M/N . NTSC-M Or NTSC(3.58)\ NTSC(4.43) Program number Antenna input 75Ω Coaxial-cable Sound output 21” : 2.5W×2 29” : 4W×2 Power input AC90V~260V Power consumption 21”=85W 29”=100W Note: The design and specifications of the devise are subject to change without prior notice. For details, confirm with the real product. - Page 5 SAWF BTSC AN5832 or 4053 LA72700 TC4053 AV SW TA1304/TA1343 AN7522/AN17821 S-AV Vout LA78040/TDA9302 LA78041/TDA8177 Video Audio E/W Cb Cr T471 2 in Chip Hout TMPA8873-XXXX EEPROM 8K bit TA9028-023/022 LA7461 SC6122 MATRIX RECEIVEERMP IV. TMPA8873-XXXX Pin Assignment Table...
- Page 6 TMPA8899-XXXX Pin and Function Description:...
- Page 7 CPU: Assignment Functions Output high level in DVD state; NO USE Key input interface; automatically test Toshiba or Sanyo key circuit; MCU digital GND; REST Reset pin, when power is connected, MCU resets; X-TAC Crystal oscillator connection terminal; required precision 20PPM; X-TAC TEST Used for MCU factory test, usually grounded;...
- Page 8 connect 10K pull-down resistor to the ground. Pin59 50HZ/60HZ switch Pin59 NTSC(60HZ) PAL(50HZ) voltage Pin61 Mute 1K pull-up resistor Pin64 Power Remote control, PIN61\64 waveform relations Shutdown Boot Power Mute Shutdown Cold boot Rotary tables Mute Mute settings: MODE2.0 When there is no blue screen, does...
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Page 9: Remote Control Part (Key Value Table)
V-out Field driving pulse output; H-Vcc Connect to 8V power supply of DEF (deflection circuit); TV GND Analog circuit grounding pin; Cb component signal input terminal; E/W-OUT E/W signal output terminal; Cr component signal input terminal; EXT-AU1 AUDEO1 input; C-in Color intensity signal input terminal;... -
Page 10: Circuit Principle Analysis
Remote control code table Client code (C7-C0)==0E0E Key icon Function Data 9028-0E0E LC6122 7461-54H7 7461-55K2 code H E X BF40 H E X H E X (D7-D0) Number key 00000000 00000001 00000010 00000011 00000100 00000101 00000110 00000111 00001000 00001001 00001010 Remote control 00001011 0x12... - Page 11 relevant pins of super single-chip TMPA8899-XXXX. Pin 57 and Pin 58 of the micro- processor (CPU) input I C bus tuning data to SCL and SDA pin of the high frequency head. The high frequency head of this device is frequency synthesis high frequency head, which performs automatic frequency synthesis tuning based in the SCL and SDA bus data output by Pin 57 and Pin 58 of the micro-processor.
- Page 12 The second sound intermediate frequency signal SIF2 obtained via the internal phase- locked decoding of TMPA8899-XXXX passes the limiting amplifier and the frequency discriminator to get an audio signal, which is output by Pin 28 and Pin 29. The two audio signals are sent to Pin 6 and Pin 8 of N701 respectively for audio power amplification, and the amplified audio signal is output to drive the speaker.
- Page 13 and VD408 (9.1V) for voltage regulation and is then sent to Pin 12 of TMPA8899-XXXX as the feedback pulse of the horizontal AFC pulse. The pulse output by Pin 10 of T471 is rectified by VD447 and filtered by C447 to obtain +180V voltage, which is supplied to the transmittal circuit as supply voltage.
- Page 14 advantage of such common emitter --- common emitter connection is high working frequency to achieve the purpose of broadband amplification. At last, V902, V912 and V922 collectors output RGB signals of around 130Vp-p, which are directly coupled to RGB cathodes of the kinescope via R917, R927 and R937 to control the size of RGB electron beams.
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Page 15: Main Ic Introduction
Symbol Pin name Function Drain terminal Transistor drain electrode — — — S/GND Source electrode Transistor electrode / grounding grounding terminal Power input terminal Control power input SS/ADJ Soft-Start over-current Over-current protection adjustment and protection terminal Soft-Start time adjustment Feedback terminal Fixed voltage control... - Page 16 retains the factory mode. B. Use factory debugging remote control: 1) Press FA key (Factory key) to return to the factory debugging menu. C. Aging mode a. Use factory debugging remote control: 1) Press FA key (Factory key) twice to enter the aging mode, the screen displays “factory”.
- Page 17 Debugging interface: XS102-WB (5V, GND, SCL, SDA) Bus release: Press the Factory key to enter the factory debugging menu, press “SLEEP” key, the CPU releases the bus control right to the automatic white balance meter, then the screen displays “TV IC ADJUST”. After the adjustment is completed, press “SLEEP”...
- Page 18 3. Setting menu description of item F0~F5 of factory debugging: F 0: NTSC system geometry adjustment (No adjustment can be made for the PAL system) Screen Notes Initial value Max. value display NT.H.PHASE 60Hz line center setting 60Hz field center setting NT.V.POSI 60Hz field amplitude setting NT.V.SISE...
- Page 19 Display Notes Recommended Max. value value H.WID Horizontal width adjustment 0~63 PARABOLA Parabola adjustment 0~127 TRAPEZIUM Trapezium correction 0~63 TOP.CORNER Top corner linearity adjustment. 0~31 BTM.CORNER Bottom corner linearity 0~31 adjustment. V.EHT Field amplitude high voltage regulation adjustment H.EHT Line amplitude high voltage regulation adjustment F 4: Brightness balance adjustment Screen...
- Page 20 SPANISH SPANISH PORTUGUESE PORTUGUESE CHINESE Traditional Chinese OSD.CONT Screen text contrast OSD.H.POSI. Screen text horizontal position OSD.V.POSI Screen text vertical position F7: AGC High frequency head band setting Screen display Notes Initial Max. value value RF.AGC Intermediary gain MENU1 Menu move bar color selection MENU2 Menu semi-transparent color selection Band frequency dividing point, low section...
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