THOMSON CR14300 Basic Service Data

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Basic service data (65 pages)

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CR14300

FEB/02

Television

Basic Service Data

Adjustment Procedures ..................................................................................................

Block Diagrams ...............................................................................................................

Circuit Description .........................................................................................................

Disassembly ...................................................................................................................

IC Pin Descriptions ........................................................................................................

Remote Control ..............................................................................................................

Replacement Partlist .......................................................................................................

Schematic Diagrams

CR14300 / CR20300 / CR20310 ................................................................................

CR29411 only ............................................................................................................

Servicing Checks .............................................................................................................

Specifications ..................................................................................................................

Troubleshooting ..............................................................................................................

Waveforms ......................................................................................................................

CAUTION: Modification or repair of this unit by unauthorized persons is a direct violation of FCC Rules Part 68.216 and could

result in risk of electric shock. You are urged to contact a qualified factory authorized service facility for repairs.

Components having special safety characteristics are identified by a ( ) on schematics and on the parts list in this Service Data and its bulletins.

Before servicing this instrument, it is important that the service technician read and follow the "Safety Precautions" in the Basic Service Data.

First Edition - First Printing

Printed in U.S.A. - Trademark(s)

Registered - Marca(s) Registrada(s)

Latin America After Sales

Indianapolis, IN 46290 U.S.A.

SERVICE DATA INDEX

SAFETY NOTICE

USE ISOLATION TRANSFORMER WHEN SERVICING

CR14300

Additional Models:

CR20300, CR20310 &

CR29411

Page

Number

CR14300

Table of Contents

Summary of Contents for THOMSON CR14300

Page 1 Circuit Description ......................Disassembly ........................IC Pin Descriptions ......................Remote Control ......................Replacement Partlist ....................... Schematic Diagrams CR14300 / CR20300 / CR20310 ................CR29411 only ......................Servicing Checks ......................Specifications ........................Troubleshooting ......................Waveforms ........................CAUTION: Modification or repair of this unit by unauthorized persons is a direct violation of FCC Rules Part 68.216 and could result in risk of electric shock.
Page 2 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;...
Page 3 1.8 Antenna Input Impedance: • VHF/UHF/CABLE..........75Ω unbalanced (“F” type connector). 1.9 Terminals: • Rear and front audio (mono) and video input …........CR14300/20300; • Rear and front audio (stereo) and video input ..........CR20310; • Two rear and one front audio (stereo) and video input........CR29411;...
Page 4: Memory Initialization
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: Agc Adjustment
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: "Screen ( G2 )" Adjustment
• 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). •...
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: The “MENU” button contains the following operations: MAIN MENU MAIN MENU PICTURE >...
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 FILTER OF AGC AND SIF AVL REF HOUT OUTPUT OF HORIZONTAL OSC. 15750HZ SAND H PULSE SAND CASTLE ALDEXT OSS AM EXTERNAL AUDIO INPUT IN THE MOD CR14300/20300 – IN THE OTHERS: N/C EHT PROT PROTECTION PLLIF PLL IF FILTER VIDEOOUT...
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...
Page 20 7.0 - OPERATION DESCRIPTION- CP02R0 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...
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 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 24 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 25 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 26 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 Verificar Check in which Check: IC901 Check: IC901 Tensãos no...
Page 27 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 28 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 29 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 30 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 31 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 32 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 33 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 34 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 35 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 36: Replacement Parts
REPLACEMENT PARTS CR14300 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description C331 T0000641 600763662000 CAP ELECT 10UF 50V CR14300 C334 C / P 600463713004 CAP ELECT 47UF 25V Electrical Parts...
Page 37 REPLACEMENT PARTS (Continued) CR14300 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description C610 T0000632 647984125004 CAP CERAM SMD 100NF 25V C831 T0000653 6375A3165002 CAP CERAM SMD 220PF 50V C611...
Page 38 REPLACEMENT PARTS (Continued) CR14300 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description C946 T0000656 642463826003 CAP CERAM 470PF 500V Y5P IC601 T0000768 4615A5241002 IC TDA9309 VERT OUT CAB02 N / A 4103D0184015 CABLE 3V 2.5MM 300MM...
Page 39 REPLACEMENT PARTS (Continued) CR14300 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description Q831 T0000727 462162287001 TRANSISTOR 250V 50MA R307 N / A 6666A5300000 RES SMD 220R 5% 63MW R308...
Page 40 REPLACEMENT PARTS (Continued) CR14300 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description R505 C / P 660400475009 RES CARBON 100R 5% R815A C / P 660985299006 RES CARBON 1.5K 10% 0.5W...
Page 41: Included Accessories
4607A9793005 DIODE ZENER 43V 0.5W 5% ZD908 T0000756 4607A9794001 DIODE ZENER 47V 0.5W 5% Instrument/Cabinet Parts BACK01 N / A 5401D2728020 CR14300 BACK COVER BOB1 T0000759 3205A9948018 14" DEGAUSS COIL BUTT01 N / A 5401A8987019 FUNCTION BUTTON CRT01 N / A...
Page 42 REPLACEMENT PARTS (Continued) CR20300 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description C331 T0000641 600763662000 CAP ELECT 10UF 50V CR20300 C334 C / P 600463713004 CAP ELECT 47UF 25V Electrical Parts C335 T0000640...
Page 43 REPLACEMENT PARTS (Continued) CR20300 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description C611 T0000632 647984125004 CAP CERAM SMD 100NF 25V C831 T0000653 6375A3165002 CAP CERAM SMD 220PF 50V C612 T0000652 6490A3171001 CAP CERAM SMD 470PF 50V...
Page 44 REPLACEMENT PARTS (Continued) CR20300 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description C945 T0000677 6490A3184005 CAP CERAM SMD 22NF 50V IC490 T0000700 461116888006 IC CD4052 DUAL 4 CHAN MUX/DEMUX C946 T0000656 642463826003...
Page 45 REPLACEMENT PARTS (Continued) CR20300 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description Q830 T0000726 462288363007 TRANSISTOR NPN-300V R305 N / A 6666A5290009 RES SMD 47R 5% 63MW 100MA (2SC3271) R306 N / A 6666A5296007...
Page 46 REPLACEMENT PARTS (Continued) CR20300 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description R506 C / P 660400475009 RES CARBON 100R 5% R815 C / P 660985299006 RES CARBON 1.5K 10% 0.5W 330MW R821 C / P...
Page 47 REPLACEMENT PARTS (Continued) CR20300 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description SW101 T0000739 4301A5983002 SWITCH TACT Q901B N / A 212160746009 WASHER PR 3.2X5.5X0.8 SW102 T0000739 4301A5983002 SWITCH TACT Q901C N / A 210160708000...
Page 48 REPLACEMENT PARTS (Continued) CR20310 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description C331 T0000641 600763662000 CAP ELECT 10UF 50V CR20310 C334 C / P 600463713004 CAP ELECT 47UF 25V Electrical Parts C335 T0000640...
Page 49 REPLACEMENT PARTS (Continued) CR20310 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description C467 T0000645 647984670002 CAP CERAM SMD 47NF 25V C604 T0000632 647984125004 CAP CERAM SMD 100NF 25V C468 C / P 601079541003 CAP ELECT 2.2UF 100V...
Page 50 REPLACEMENT PARTS (Continued) CR20310 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description C801 T0000666 644263745003 CAP CERAM 4.70NF Z5U C936 T0000639 6490A3173004 CAP CERAM SMD 1NF 50V 900VAC C802 T0000638 6375A3163000 CAP CERAM SMD 100PF 50V...
Page 51 REPLACEMENT PARTS (Continued) CR20310 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description D918 T0000683 460261728004 DIODE 75V 150MA (1N4531) Q401 T0000723 462784409002 TRANSISTOR SMD NPN 50V D919 T0000689 460422655000 DIODE BYV26C 600V/1A 30NS 100mA (DTC144EKA) F901...
Page 52 REPLACEMENT PARTS (Continued) CR20310 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description R126 N / A 6666A5326008 RES SMD 22K 5% 63MW R404 N / A 6666A5321006 RES SMD 8.2K 5% 63MW R128 N / A 6666A5322002...
Page 53 REPLACEMENT PARTS (Continued) CR20310 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description R601 C / P 660400479004 RES CARBON 220R 5% R824 C / P 660400490008 RES CARBON 1.8K 5% 330MW 330MW R602...
Page 54 REPLACEMENT PARTS (Continued) CR20310 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description SW105 T0000739 4301A5983002 SWITCH TACT Q901C N / A 210160708000 SCREW M3X12 PAN SW106 T0000739 4301A5983002 SWITCH TACT Q901D N / A 211160753005...
Page 55 REPLACEMENT PARTS (Continued) CR29411 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description C331 C / P 600763662000 CAP ELECT 10UF 50V CR29411 C332 T0000639 6490A3173004 CAP CERAM SMD 1NF 50V Electrical Parts C333 T0000638...
Page 56 REPLACEMENT PARTS (Continued) CR29411 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description C461 C / P 600486450000 CAP ELECT 10UF 25V C495R C / P 601079541003 CAP ELECT 2.2UF 100V C462 C / P 601078320003...
Page 57 REPLACEMENT PARTS (Continued) CR29411 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description C718 T0000657 900163747006 CAP CERAM 470PF Y5R 2KV C922 T0000657 900163747006 CAP CERAM 470PF Y5R 2KV C719 T0000660 642463800004 CAP CERAM 1NF 500V Y5P...
Page 58 REPLACEMENT PARTS (Continued) CR29411 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description D702 T0000683 460261728004 DIODE 75V 150MA (1N4531) L102 T0000711 320184422009 COIL AXIAL 12UH 150MA D703 T0000683 460261728004 DIODE 75V 150MA (1N4531) L103 T0000712...
Page 59 REPLACEMENT PARTS (Continued) CR29411 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description Q830 T0000726 462288363007 TRANSISTOR NPN-300V R209 N / A 6666A5322002 RES SMD 10K 5% 63MW 100MA (2SC3271) R301 C / P 660400487007...
Page 60 REPLACEMENT PARTS (Continued) CR29411 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description R403 C / P 660400475009 RES CARBON 100R 5% R494 N / A 6666A5322002 RES SMD 10K 5% 63MW 330MW R494R N / A...
Page 61 REPLACEMENT PARTS (Continued) CR29411 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description R719 T0000732 6645D2210004 RES WIRE 3.3R 5% 5W R931 N / A 6666A5328000 RES SMD 33K 5% 63MW R720 N / A 6666A5330004...
Page 62 REPLACEMENT PARTS (Continued) CR29411 (See Product Safety Note on first page of this parts list) Symbol Stock Drawing Description Symbol Stock Drawing Description CABN02 N / A 2030D5093015 CR29411 PREPARED CABINET SET IC401A N / A 2030D1368018 AUDIO HEAT SINK SET IC401B N / A 212160746009...
Page 63: Servicing Notices On Checking
SERVICING NOTICES ON CHECKING 1. Keep the notices As for the places which need special attentions, they are indicated with the labels or seals on the cabinet, chassis and parts. Make sure to keep the indications and notice in the operation manual.

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Cr20300 Cr20310 Cr29411

THOMSON CR14300 Basic Service Data

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