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1 - GENERAL SPECIFICATIONS
1.1 Product Models:
•
CR14300/20300...................................................................MONO conventional model;
•
CR20310..................................................................................................STEREO SAP;
•
CR29411..................................................................................................STEREO SAP.
1.2 Power Supply:
a) Power Source Range.........................................................................99VAC to 242VAC.
b) Power Supply: automatic commutation.
c) Power Consumption:
•
Model CR14300......................................................................................................60W;
•
Model CR20300......................................................................................................72W;
•
Model CR20310......................................................................................................80W;
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Model CR29411....................................................................................................130W;
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STAND BY..................................................................2W (120VAC) and 3W (220VAC).
d) High Voltage (Fly back Anode Voltage) and beam current:
•
High Voltage: CR14300/20300....................................................................22 ± 1.5 KV;
•
Beam current - with brightness and contrast at the maximum...................0.7 + 0.1 mA;
•
CR20310...............................................................................23 + 1.5 KV;
•
Beam current - with brightness and contrast at the maximum...................0.9 + 0.1 mA;
•
CR29411............................................................................27.5 + 1.5 KV;
•
Beam current - with brightness and contrast at the maximum...................1.4 + 0.1 mA;
e) Heating:..............................................................................................6.15 + 0.15 Vrms.
f) FLY BACK Main Power Supply :
•
"Fly back" Output Voltage CR14300...........................105 ± 2 V DC; max ripple 2 Vpp;
•
"Fly back" Output Voltage CR20300 e CR20310.......108.5 ± 2V DC; max ripple 2 Vpp;
•
"Fly back" Output Voltage CR29411...........................130 ± 2V DC.; max ripple 2 Vpp.
1.3 Tuner and Receiving channel:
•
Channel Coverage..................................................... 181 channels VHF/UHF/cable.
•
Color System: .....................................................................PAL-N , PAL-M and NTSC;
1.4 Video Signal - Resolution:
•
Horizontal .......................................................................................................260 lines.
•
Vertical............................................................................................................330 lines.
1.5 Intermediate Frequency:
•
Video carrier..................................................................................................45.75Mhz;
•
Audio carrier..................................................................................................41.25Mhz;
•
Chrome carrier...............................................................................................42.17Mhz.
2
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Related Manuals for THOMSON CR20300
Summary of Contents for THOMSON CR20300
- Page 1 “Fly back” Output Voltage CR14300...……....105 ± 2 V DC; max ripple 2 Vpp; • “Fly back” Output Voltage CR20300 e CR20310…..108.5 ± 2V DC; max ripple 2 Vpp; • “Fly back” Output Voltage CR29411………....130 ± 2V DC.; max ripple 2 Vpp.
- Page 2 • Rear Audio output ……………………........CR29411 and CR20310; • Output maximum impedance..............1kOhms; • Variable output level (maximum volume)............1.5Vrms; 1.10 Dimensions (WxDxH): • CR14300...................358.5x383x349 mm; • CR20300....................486x488x446 mm; • CR20310....................486x488x446 mm; • CR29411....................754x529x578 mm. 1.11 Weight: • CR14300........................8.9kg; • CR20300......................17.1kg; •...
- Page 3 2. DISASSEMBLY INSTRUCTIONS Removal of mechanical parts and P.C. boards. 2.1 Back cabinet (refer to fig. 2.1) a. Remove the screws which are used for holding the back cabinet to the front cabinet (6 screws for 14” models, 8 screws for 20” and 29” models). b.
- Page 4 3. ON-SCREEN DISPLAY ADJUSTMENT – SERVICE MODE 3.1 Memory Initialization If a service repair is undertaken where it has been required to change the MEMORY IC (IC101 and IC102) the following steps should be taken to ensure correct data settings: " memory initialization": •...
- Page 5 SERVICE SERVICE SERVICE SERVICE AGCT AGCS SERVICE SERVICE SERVICE SERVICE ORIGMAG FMWS FETRACK AVTRACK MODEL VO.3P BLKCURR 3.3 Service Menu Items: HP = Horizontal Parallelogram RGB = OSD Bright HB = Horizontal Bowl SBL= Services Blanking HSH = Horizontal Shift Adjust FFI = IF Filter VS = Vertical Slope MAT = Color Matrix...
- Page 6 3.4 AGC Adjustment • Apply a color bar pattern (RF Input) with 500µV signal; • Connect a DC Voltmeter, in the AGC pin of the tuner; • Adjust AGCT to Zero and measure the voltage (V1); • Adjust AGCT so that the indication on the voltmeter be (V1) - 1 ± 0.2V. 3.5 Stereo Adjustment •...
- Page 7 • Activate the adjustment mode display (SBL item). Ajust SBL from 0 to 1. Blanking the bottom of the screen. • Adjust VSH until the bottom of the pattern be aligned with the reference marks of the mechanical center on picture tube (the central vertical line in the center of the tube). •...
- Page 8 • Press “VOLUME +” button and change the value from 0 to 1. Turn off the television and the ORIGINAL MAGIC setup will be registered. 3.9 “SCREEN ( G2 )” Adjustment • Apply a Circle Pattern Philips at the antenna terminal (RF Input). •...
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Page 9: Remote Control
4 – REMOTE CONTROL Models CR14300/20300/20310 NOTE: Consult the original r. c. manufacturer documentation to access the schematic diagram and the replacement parts list. The “MENU” button contains the following operations: MAIN MENU PICTURE > SOUND > CHANNEL > TUNING >... - Page 10 4 – REMOTE CONTROL Model CR29411 NOTE: Consult the original r. c. manufacturer documentation to access the schematic diagram and the replacement parts list. The “MENU” button contains the following operations: MAIN MENU PICTURE > SOUND > CHANNEL > TUNING >...
- Page 11 5.2 – BLOCK DIAGRAM OF IC-101 (TDA9380)
- Page 12 5.3 – BLOCK DIAGRAM OF IC-490 (BU4052...
- Page 13 5.4 – BLOCK DIAGRAM OF IC-601 (VERTICAL DEFLECTION BOOSTER) TDA9309/TDA8177F 5.5 – BLOCK DIAGRAM OF IC-401 (STEREO AMPLIFIER) TDA7499...
- Page 14 5.6 – BLOCK DIAGRAM OF IC-450 (STEREO DECODER)
- Page 15 5.7 – BLOCK DIAGRAM OF IC-430 – LMC568 PLL-“SAP”...
- Page 16 6 – DESCRIPTION OF THE FUNCTIONS – THE INTEGRATED CIRCUIT´S PINS 6.1 – IC101 (TDA9380) SIGN DESCRIPTION OPEN SERIAL CLOCK OUTPUT SERIAL DATA OUTPUT GAME GAME (PWM) SWITCHES A SWITCHES OF THE FRONT PANEL (IN) SWITCHES B SWITCHES OF THE FRONT PANEL AND LED INDICATION (IN) VSH DET SVHS DETECTING (IN) DET SAP...
- Page 17 BCORR/VGUARD BLYIN BEAM CURRENT GREEN BLUE VDD A SUPPLY GROUND VDD C SUPPLY OSDGND GND OF OSC 12MHZ CRISTAL OF 12MHZ XOUT CRISTAL OF 12MHZ RESET RESET CIRCUIT VDD P SUPPLY 33V MUDO MUTE PW ON POWER IR INPUT 6.2 - IC 901 (TDA16846) SIGN DESCRIPTION OFF TIME CIRCUIT...
- Page 18 CAPACITOR TIMING WIDEBAND FOR DBX CAPACITOR TIMING SPECTRAL FOR DBX CAPACITOR WIDEBAND FOR DBX CAPACITOR SPECTRAL FOR DBX VARIABLE EMPHASIS OUTPUT FOR DBX VARIABLE EMPHASIS INPUT FOR DBX CAPACITOR NOISE REDUCTION FOR DBX CAPACITOR MUTE FOR SAP CDEC CAPACITOR DC-DECOUPLING FOR SAP GROUND SDA1 SERIAL DATA INPUT/OUTPUT (I2C-BUS)
- Page 19 OUTB OUTPUT IN2B AV3 ( L) INPUT TO CR29411 AND VIDEO INPUT TO CR14300/20300 IN3B AV1 ( L) INPUT TO CR20310/29411 - AUDIO INPUT TO CR14300/20300 SUPPLY VOLTAGE 6.5 – IC102 (M24CO4MN) SIGN DESCRIPTION GROUND GROUND GROUND GROUND SERIAL DATA SERIAL CLOCK TEST GROUND...
- Page 20 7.0 - OPERATION DESCRIPTION TELEVISION SET CIRCUIT Fig.1- Block diagram 3.Tuner 5. Stereo 6.Audio decoder output 2. TV signal processor and Microprocessor Speaker Circuit 7.Video 4. AV output switches 8.Horizontal and vertical 1. Power Supply deflections The block diagram in Fig.1 shows how the TV set circuit works divided into 8 basic circuits. 7.1 - POWER SUPPLY IC901, IC902, IC903, T901, Q901 and surrounding components (9xx) This is a switching mode power supply designed to operate in AC power source from 99 Volts to 242 Volts...
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Page 21: Stereo Decoder
-Enhanced 80C51 microprocessor core; -Internal program memory (48 Kbytes ROM and 1 Kbytes RAM); -High performance OSD; -Closed Caption decoder; -I2C bus serial I/O; -Only one reference (12 MHz) crystal for all internal timing; -Multi-standard vision IF circuit (45.75 MHz) with PLL demodulator; -PAL/NTSC color decoder with automatic search system;... - Page 22 7.8 - HORIZONTAL AND VERTICAL DEFLECTIONS IC601, T701, T702, Q701 and surrounding components. Vertical deflection circuit uses a TDA9309 (IC601 - vertical deflection booster) and operates with around 24V and provides output current to drive the yoke. The input signals are vertical drive A and B from the TV signal processor (VDRA_pin22 and VDRB_pin21 IC101).
- Page 23 8.0 - REPAIR PROCEDURE FLOWCHART – AUDIO CIRCUIT Without sound Models CR20310/29411 Check IC101 IC101 pin 43 C404 Signal. OK ? Models CR14300/20300 Check: IC450 pin 6 Connect the AV and 47 signals. Input signal. OK ? OK ? IC101 pin 28 C404 Signal .
- Page 24 8.1 – REPAIR PROCEDURE – HORIZONTAL CIRCUIT START Is there VCC Check the VCC in the power supply pins 14/39/54/56/61? IC101 pin 33 Check Signal. X101 or IC101 OK ? Check : Q702: Collector voltage. R715, R716, C716 and T702 OK ? Check C714...
- Page 25 8.2 – REPAIR PROCEDURE FLOWCHART – POWER SUPPLY CIRCUIT- Stand by mode Start Check:: IC 101 Stand by power horizontal flowchart Check : TH901 Is F901 Check: C909 open? Voltage.OK ? Check: TH901, IC901 and Q901 Check in which Check: IC901 Check: IC901 pin lacks voltage pin 4 and 13...
- Page 26 8.3 – REPAIR PROCEDURE FLOWCHART – TUNER TV doesn’t TUNE IN Check: Tuner Check: R206, Pins 4 and 5 . R207, IC101 and OK ? IC102 Check: tuner supply voltage. Fix the fault OK ? Replace tuner...
- Page 27 8.4 – REPAIR PROCEDURE FLOWCHART – POWER SUPPLY - MAIN CIRCUIT TV DOESN´T TURN ON Check: IC101 Fix the voltage pins14/39/54 supply /56/61 (supply voltage). OK ? Check Check: IC 101, Q904 signal. OK ? Q904 and R927 Check: If it’s 12V, TV is in D912 gate pin (9V).
- Page 28 8.5 – REPAIR PROCEDURE FLOWCHART - SAP CIRCUIT WITHOUT Check or Check: IC101 pin 28 replace signal. IC101 / C404 OK ? Check or replace Check: IC430 pin 4 Q430/ C432 / R433 signal. OK ? Check: IC101 pin 8 Check or replace signal.
- Page 29 8.6 – REPAIR PROCEDURE FLOWCHART – VERTICAL CIRCUIT Vertical closed IC601 pins 4 Check: VCC and 6 +12 and -12 voltage. OK? Yoke Fix the fault Connected ? IC101 pins IC601 pins 1 21 and 22 and 7 signals? signals? Check or replace C601/602 R601/602/613/R612...
- Page 30 8.7 – REPAIR PROCEDURE FLOWCHART – VIDEO AND CHROME CIRCUIT CHROME AND VIDEO Check: IC101 pin 38, video pack IC101 signal. OK ? Check: IC101 pin 40 Check: C301 (same signal pin 38). OK ? Check: AV external video Signal. OK ? Check: IC101 Check: IC101 pin...
- Page 31 9 – WAVEFORMS IC101 – pin 22 one chip 0.78Vpp 5 ms IC101 – pin 21 one chip 0.5 Vpp 5 ms IC601 – pin 7 Vertical 63Vpp 5 ms IC901 – pin 13 Power 11.5Vpp 5µ s IC901 – pin 2 Power 1.2Vpp 5µ...
- Page 32 IC101 – pin 40 0.6Vpp 20 µ IC101 – pin 38 one chip 1.5VPP 20µ s IC101 – pin 33 0.95Vpp 20µ s IC101 – pin 34 one chip 5.7 Vpp 20 µ s...
- Page 33 Q702 collector pin 100Vpp 20µ Q701 base pin 10Vpp 20µ s IC101 one chip – Pin 53 – B 4.5 Vpp 20 µ s IC101 one chip – Pin 52 – G 3.8Vpp 20 µ s...
- Page 34 IC101 one chip – Pin 51 – R 4.5Vpp 20µ s CRT Socket – Pin 6 – G-K 98Vpp 20 µ s CRT Socket – Pin 11 – B 98Vpp 20 µ s CRT Socket – Pin 8 – R 98Vpp 20 µ...
- Page 35 * MODEL's DIFERENCES POS/MOD CR14300 CR20300 CR20310 ONLY FOR 20" STEREO 20" STEREO PINS FOR 20" CRT SOCKET (*) ONLY FOR 20" STEREO AUDIO R AUDIO L TO C405 AUDIO L C405R C405 TO C405R AUDIO R * R815/815A R835/835A...