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RCA MCR51R410 Service Manual
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RCA MCR51R410 Service Manual

RCA MCR51R410 Service Manual

Thomson crt tv service manual
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A-PDF MERGER DEMO
A-PDF MERGER DEMO
CN-12C5
Nov / 03
VCR
Basic Service Data
Contents
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chassis Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Circuit Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
IC Pin Out and Functional Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
IC Voltage / Resistance Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Replacement Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix
Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix
Circuit Board Component Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix
Components having special safety characteristics are identified by a ( ) on schematics and on 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
Copyright 2003 - Thomson inc
Printed in U.S.A. - Trademark(s) Registered - Marca(s) Registrada (s)
Models Included:
USE ISOLATION TRANSFORMER WHEN SERVICING
Latin America After Sales
Indianapolis, IN 46290 U.S.A.
MCR51R410
MCR51R420
MCR53TF30
SAFETY NOTICE
CN-12C5
Page
CN-12C5

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Summary of Contents for RCA MCR51R410

  • Page 1 “Safety Precautions” in the Basic Service Data. First Edition – First Printing Copyright 2003 – Thomson inc CN-12C5 Printed in U.S.A. – Trademark(s) Registered – Marca(s) Registrada (s)

  • Page 2: Specifications

    SERVICE MANUAL SPECIFICATIONS Model Number MCR51R410 MCR51R420 MCR53TF30 Color PAL4.43, NTSC3.58, NTSC4.43 system RF system Sound D/K,I,M,B/G system PAL4.43, NTSC3.58, NTSC4.43 (50/60Hz) Video system C1- C12 Receiving C13-C57 channel Z1-Z37 CATV Channels preset Picture tube Effective 280 210mm 406 305mm...

  • Page 3: Safety Precaution

    SERVICE MANUAL INSTRUCTIONS FOR SERVICE SAFETY AND MAINTENANCE WARNING: BEFORE SERVICING THIS CHASSIS, READ THE X-RAY RADIATION PRECAUTION , SAFETY PRECAUTION AND PRODUCT SAFETY NOTICE INSTRUCTION BELOW. X-RAY RADIATION PRECAUTION 1. The EHT must be checked every time the TV is serviced to ensure that the CRT does not emit X-ray radiation as result of excessive EHT voltage.
  • Page 4 SERVICE MANUAL 5. Do not use a magnetized screwdriver when tightening or loosing the deflection yoke assembly to avoid electronic gun magnetized and decrement in convergence of the CRT. 6. When remounting the TV chassis, ensure that all guard devices, such as nonmetal control buttons, switch, insulating sleeve, shielding cover, isolating resistors and capacitors, are installed on the original place.
  • Page 5 SERVICE MANUAL Safety Symbol Description The lightning symbol in the triangle tells you that the voltage inside this product may be strong enough to cause an electric shock. Extreme caution should be exercised when working on the TV with the back removed. This is an international hazard symbol, telling you that the components identified by the symbol have special safety-related characteristics.

  • Page 6: Adjustments

    SERVICE MANUAL ADJUSTMENTS Set-up Adjustments The following adjustments should be made when a complete realignment is required or a new picture tube is installed. Perform the adjustments in the following order: 1. Color purity 2. Convergence 3. White balance Notes: The purity/convergence magnet assembly and rubber wedges need mechanical positioning.
  • Page 7 SERVICE MANUAL Yoke Fig. 1 2. Convergence Adjustment Preparation: Before attempting any convergence adjustment, the TV should be operated for at least 15 minutes. 2.1 Center convergence adjustment 2.1.1 Receive dot pattern. 2.1.2 Adjust the brightness/contrast controls to obtain a sharp picture. 2.1.3 Adjust two tabs of the 4-pole magnet to change the angle between them and red and blue vertical lines are superimposed each other on the center of the screen.

  • Page 8: Circuit Adjustments

    SERVICE MANUAL yoke assembly on the picture tube. 2.2.7 After fastening the three wedges, recheck overall convergence and ensure to get optimal convergence. Tighten the lamp screw holding the deflection yoke assembly. Fig. 2 4-pole Magnet Movement 6-pole Magnet Movement Center Convergence by Convergence Magnets Incline the Yoke Up (or Down) Incline the Yoke Right (or Left)
  • Page 9 3.3 The high voltage reading should be less than the EHT limitation. 3.4 Change the brightness from minimum to maximum, and ensure high voltage not beyond the limitation in any case. Nominal EHT voltage:For MCR51R410,MCR51R420,MCR53TF30 is 28 1.5KV: Limited EHT voltage: For MCR51R410,MCR51R420,MCR53TF30 is 30.5KV.
  • Page 10 SERVICE MANUAL Before Adjusting After Adjusting 5. Safety Inspection 5.1 Inspection for insulation and voltage-resistant Perform safety test for all naked metal of the TV. Supply high voltage of 3000V AC, 50Hz (limit current of 10mA) between all naked metal and cold ground. Test every point for 3 sec. and ensure no arcing and sparking.
  • Page 11 SERVICE MANUAL 6.2 Adjustments and Bus data Item Symbol Description Bus Data Remarks MENU.00 V.POS /50H VERTICAL POSITION/50Hz H.PHASE/50H HORIZONTAL PHASE/50Hz V.SIZE/50H VERTICAL SIZE/50Hz V.POS /60H VERTICAL POSITION/60Hz H.PH/60H HORIZONTAL PHASE/60Hz V.SIZE/60H VERTICAL SIZE/60Hz V.SC VERTICAL S-CORRECTION V,LINE VERTICAL LINE V.SIZE CMP VERTICAL SIZE COMPENSATION MENU.01...
  • Page 12 SERVICE MANUAL MENU.04 SUB.COLOR SUB COLOR SUB.TINT SUB TINT SUB.SHARP SUB SHARP AUTO FLESH AUTOMATIC FLESH CORING.GAN CORING GAIN C.EXT EXTERNAL CHROMA C.BYPASS CHROMA BAND-PASS BYPASS C.KILL ON COLOR KILL ON MENU.05 FIL.SYS FILTER SYSTEM SELECT Y/C FILTER MODE COLOR.SYS COLOR SYSTEM VOL.FIL VOLUME FILTER...
  • Page 13 SERVICE MANUAL G/Y ANGLE G-Y ANGLE COL KIL OP COLOR KILLER OPERATIONAL POINT CBCR-IN YCbCr INPUT or SECAM INPUT Y-APF YCbCr ALL PASS FILTER SELECT PRE SHOOT PRE-SHOOT SELECT WPL OPE WHITE PEAK LIMITER OPERATING POINT DC REST DC RESTORATION SELECT BK STR STA BLACK STRETCH START BK STR GAN...
  • Page 14 SERVICE MANUAL OPT.VIDEO OPT.VIDEO OPT.AV1AV2 OPT.AV1AV2 MCR51R410 OPT.AV3 OPT.AV3 OPT.S-VHS OPT.S-VHS OPT.YUV OPT.YUV OPT.COMB OPT.COMB OPT.BYPASS OPT.BYPASS MENU.16 MENU.16 OPT.VM OPT.VM OPT.BLUEBK OPT.BLUEBK OPT.V-CHIP OPT.V-CHIP OPT.CCD OPT.CCD OPT.CLOCK OPT.CLOCK OPT.P-ON OPT.P-ON X-RAY VOLT X-RAY VOLTAGE SRCH.SPEED SEARCH.SPEED ROM CORRECTION CORREC MENU.17...
  • Page 15 STRUCTURE AND CHASSIS FUNCTION DESCRIPTION 1 Structure Block Diagram...
  • Page 16 2 Block Diagram for Supply Voltage System...
  • Page 17 3 System Control Block Diagram...
  • Page 18 SERVICE MANUAL 4 Chassis Description MCR51R410/420/MCR53TF30 These TV uses CN-12C5 chassis which mainly includes a small signal processor LA76818A microcontroller LC863440/CH04T1232 vertical scan output stage circuit LA7840 and sound power amplifier TDA7057AQ. The switch power circuit is formed of hybrid IC STR-G5653.

  • Page 19: Service Data

    SERVICE MANUAL SERVICE DATA 1 Technical Data of Key ICs 1.1 Small signal processor LA76818A a. Block Diagram...
  • Page 20 SERVICE MANUAL Function Function Audio Output SIF Input FM Output/Selected Audio Output SIF APC Filter PIF AGC SIF Output RF AGC Output Ext. Audio Input PIF Input1 APC Filter PIF Input2 VCO Coil 1 IF Ground VCO Coil 2 IF Vcc VCO Filter FM Filter Video Output...
  • Page 21 SERVICE MANUAL 1.2 Microcontroller LC86F3448A/CH04T1232(36 DIP) 1.2.1 Overview The LC86F3448A are 8-bit single chip microcontrollers with the following on-chip functional blocks: - CPU Operable at a minimum bus cycle time of 0.424 s - On-chip ROM capacity Program ROM:32K/28K/24K/20K/16K bytes CGROM:16K bytes - On-chip ROM capacity: 512 bytes - OSD RAM: 352×9 bits...
  • Page 22 SERVICE MANUAL 1.2.2 System Block Diagram Fig.8 1.2.3 Refer to Table 3 about Functions and Service Data of LC86F3448A s Pins.
  • Page 23 SERVICE MANUAL 1.3 EEPROM AT24C04/ST24C04 1.3.1 Features ·Data EEPROM internally organized as 512 bytes and 32 pages×16 bytes ·Page protection mode, flexible page-by-page hardware write protection -Additional protection EEPROM of 32 bits, 1 bit per data page -Protection setting for each data page by writing its protection bit -Protection management without switching WP pin ·Low power CMOS...
  • Page 24 SERVICE MANUAL 1.3.2 Pin Configuration Fig.10 1.3. 3 Block Diagram Fig.11 1.3.4 Refer to Table 4 about Functions and Service Data of ST24C04 s Pins.
  • Page 25 SERVICE MANUAL 1.4 Vertical scan output stage circuit LA7840/L 1.4.1 Features Low power dissipation due to built-in pump-up circuit Vertical output circuit Thermal protection circuit built in Excellent crossover characteristics DC coupling possible 1.4.2 Block Diagram Fig.12 1.4.3 Refer to Table 6 about Functions and Service Data of LA7840 s Pins.
  • Page 26 SERVICE MANUAL 1.5 Sound power amplifierTDA7057AQ amplifier with DC volume control. The device is 1.5.1 Features DC volume control designed for use in TVs and monitiors, but is Few external components also suitable for battery-fed portable Mute mode recorders and radios. Thermal protection Short-circuit proof Missing Current Limiter (MCL)
  • Page 27 SERVICE MANUAL 1.6 TV/Video switch circuit KA2102B/KA2192B 1.6.1 Features The KA2102B (NY01) TV/Video switch circuit is an electronic switch circuit controlling four sets of audio signal inputs, three sets of video signal inputs, two sets of Y/C separation signals inputs, one set of video signal output, one set of Y/C separation signal output and one set of audio signal output.
  • Page 28 SERVICE MANUAL 1.7 Analog switch circuit HEF4053BP 1.7.1 Description The HEF4053 is a triple 2-channel analog multiplexer/demultiplexer with a common enable input ( Each multiplexer/demultiplexer has two independent inputs/outputs (Y and Y ), a common input/output (Z), and select inputs (Sn). Each also contains two-bidirectional analog switches, each with one side connected to an independent input/output (Y and Y ) and the other side connected to a...
  • Page 29 SERVICE , MANUAL 1.7.3 Function Table Inputs Channel On Notes H=HIGH state (the more positive voltage) L=LOW state (the less positive voltage) X=STATE is immaterial none 1.7.4 Refer to Table 8 about Functions and Data of HEF4053’s Pins. 1.8 Power supply circuit STR-G5653 The Series STR-G5653/F6654 is specifically designed to satisfy the requirements for increased integration and reliability in off-line quasi-resonant flyback converters.
  • Page 30 SERVICE , MANUAL Overmolded 5-Pin Package (2) Circuit Block Diagram Fig.16 (3) Pin Configuration and Functions Dwg MK-003-50 Fig.17 a. Pin function for STR-G5653 Pin No. Symbol Function Description MOSFET drain MOSFET source Ground Supply voltage input for control circuit OCP/FB Over-current protection detection signal/ voltage-limiting signal input...
  • Page 31 SERVICE , MANUAL b. Pin function for STR-F6654 Pin No. Symbol Function Description OCP/FB Over-current protection detection signal/ voltage-limiting signal input MOSFET source MOSFET drain Supply voltage input for control circuit Ground (4)Difference between STR-G5653 and STR-F6654 a.Different size: STR- F6654 is larger b.Different pin functions c.Different electric characteristics: Larger power output, switching current, avalanche-rated and internal allowable power consumption for STR-F6654...
  • Page 32 SERVICE , MANUAL Fsc Output/Sync Output 6.04 Vertical Output 2.31 2.31 Ramp ALC Filter 2.786 583.4 6.45 Horizontal/Bus Vcc 5.188 4.34 Horizontal/AFC Filter 2.686 582.2 6.54 Horizontal Output 0.702 1.41 Flyback Pulse Input 1.056 22.84 6.16 VCO IREF 1.71 4.72 4.52 Clock (4MHz)Output 0.915...
  • Page 33 SERVICE , MANUAL Table 3 Functions and Service Data of LC86F3448A (D701)’s Pins GDM8145 Multimeter Ground Resistance (k ) Measure with red Measure with Pin No. Function Description Voltage of probe while black probe while Pin (V) grounding black grounding red probe.
  • Page 34 SERVICE , MANUAL Output terminal for AV2 on/off control 5.30 11.8 6.36 Output terminal for AV1 on/off control 5.30 11.4 6.33 Output terminal for AV0 on/off control 5.29 141.2 6.33 Table 4 Functions and Service Data of AT24C04/ST24C04 (D702)’s Pins DT890D Digital Multimeter Ground Resistance ( )Negative Resistance(k ) Measure with red...
  • Page 35 SERVICE , MANUAL R2 IN 5.70 6.33 3.67 E2 IN 5.56 6.83 4.01 5.25 6.84 5.59 5.25 6.85 5.59 MUTE 0.00 0.00 0.00 Y OUT 3.89 1.418 1.51 0.00 0.00 0.00 C OUT 3.84 0.96 1.15 R OUT 4.37 6.63 3.35 L OUT 4.37...
  • Page 36 SERVICE , MANUAL Table 7 Functions and Service Data of TDA7057AQ (N191)’s Pins GDM8145 Multimeter Pin No. Function Description Voltage (V) Positive Resistance (K ) Negative Resistance (K ) Volume control input 0.95 6.85 6.15 Not connected 0.00 Audio R signal input 2.38 12.59 6.51...

  • Page 37: Circuit Board Component Views

    SERVICE , MANUAL 3. Replacement of Parts 3.1 Description Many electrical and mechanical components in this chassis have special safety-related characteristics. Components which have these special safety characteristics in this manual and its supplements are identified by the international hazard symbols or UL,C-UL, FCC, FDA or VDE marking on the circuit diagram and parts list.
  • Page 39 Printed Circuit Board diagrams (1)
  • Page 42 MCR51R410 (Main Diagram) Chassis : CN-12C5...

This manual is also suitable for:

Mcr51r420Mcr53tf30