RCA MCR61TF30, Service Manual

Page 1: ...FILE NO SM CTV O 039A COLOR TELEVISION SERVICE MANUAL MODEL NO MCR61TF30 MCR66R400 MCR68R420 MCR68TF800 CHASSIS NO CH 10C5 Please read this manual carefully before service A PDF MERGER DEMO ...

Page 2: ...k Diagram 4 Block Diagram for Supply Voltage System 5 Block Diagram for Remote Control Structrre 6 Block Diagram for Video Signal Processor 7 SERVICE DATA 8 Technical Data of Key ICs 8 Service Data of Key ICs 22 Waveforms of Key Points 28 ADJUSTMENTS 32 Set up Adjustments 32 Circuit Adjustments 34 Service Mode and Bus Data 36 APPENDIX 1 Circuit Diagram 2 Final Wiring Diagram 3 Exploded View 4 Prin...

Page 3: ...TV or 30KV for 29 TV Extreme caution should be exercised when working on the receiver with the back removed 1 Do not attempt to service this receiver if you are not conversant with the precautions and procedures for working on high voltage equipment 2 When handling or working on the CRT always discharge the anode to the receiver chassis before removing the anode cap in case of electric shock 3 The...

Page 4: ...ou that the critical components identified by the FDA marking have special safety related characteristics UL This symbol tells you that the critical components identified by the UL marking have special safety related characteristics VDE This symbol tells you that the critical components identified by the VDE marking have special safety related characteristics Maintenance 1 Place the TV set on a st...

Page 5: ...t 3 N852 LM317T Tri terminal regulator 4 N601 TDA7057AQ Sound power amplifier 5 N001 LC86F3264AU DIP Microcontroller 6 N002 AT24C04 AT24C08 EEPROM 7 NY01 TDA6107Q Video amplifier 8 DS01 HEF4053 Analog switch circuit 9 DS02 HEF4053 Analog switch circuit 10 N606 TDA9859 Audio processor 11 A101 TDQ 6F2M Tuner Notes AT24C04 N002 is for MCR61TF30 only AT24C08 N002 is for MCR66R400 MCR68R420 MCR68R800 3...

Page 6: ...SERVICE MANUAL BLOCK DIAGRAMS FOR CHASSIS Structure Block Diagram 4 ...

Page 7: ...SERVICE MANUAL Block Diagram for Supply Voltage System Fig 2 Block Diagram for CH 10C1 S Supply Voltage System 5 ...

Page 8: ...SERVICE MANUAL Black Diagram for Remote Control Structure 6 ...

Page 9: ...SERVICE MANUAL Block Diagram for Video Signal Processor 7 ...

Page 10: ...SERVICE MANUAL SERVICE DATA Technical Data of Key ICs LC86F3264AU DIP N001 1 Terminal Assignment Layouts Fig 5 LC86F3264AU DIP DIP42S Terminal Assignment Layout 8 ...

Page 11: ... I O Intensity I output terminal of RGB image RL O Fast blanking control signal Switch TV image and caption OSD image signal O Part 0 P00 P07 I O 8 bit input output port Input output can be specified in nibble unit Other functions Hold release input Internal input Pull up resistor provided not provided Output format CMOS Nch OD E Port 1 P10 P17 I O 8 bit input output port Each bit can be independe...

Page 12: ...ling Rising Falling H level L level Vector INTO INT1 INT2 INT3 yes yes yes yes yes yes yes yes no no yes yes yes yes no no yes yes no no 03H 0BH 13H 1BH P70 W P71 P73 V Port 8 P83 P84 P87 I I O 1 bit input port P83 is set only in CH04T1002 4 bit input output port P84 P87 Each bit can be independently programmable Other function AD converter input port P83 B P84 P87 X Port options can be specified ...

Page 13: ...igh programming flexibility Internal programming voltage Self timed programming cycle including erase Byte write and page write programming between 1 and 16 bytes Typical programming time 6 ms 10ms for up to 16 bytes High reliability Fig 6 Endurance 106 cycles1 Data retention 40 years1 ESD protection 4000 V on all pins 8 pin DIP DSO packages Available for extended temperature ranges Industrial 40 ...

Page 14: ...X 5X series are I2 C bus controlled single chip TV processors which are intended to be applied in PAL NTSC PAL NTSC and multi standard television receivers The N2 version is pin and application compatible with the N1 version however a new feature has been added which makes the N2 more attractive The IF PLL demodulator has been replaced by an alignment free IF PLL demodulator with internal VCO no t...

Page 15: ...SERVICE MANUAL 4 Block Diagram Fig 8 Block Diagram Economy Versions S DIP 56 Envelope 5 Refer to Table 5 about Functions and Data of the IC s Each Pin 13 ...

Page 16: ...due to common mode inputs Temperature thermal protection East West output stage with one single conversion resistor 2 General Description The TDA8350Q is a power circuit for use in 90 and 110 colour deflection systems for field frequencies of 50 to 120 Hz The circuit provides a DC driven vertical deflection output circuit operating as a highly efficient class G system and an East West driver for s...

Page 17: ...AQ is a stereo BTL output amplifier with DC volume control The device is designed for use in TVs and monitiors but is also suitable for battery fed portable recorders and radios Missing Current Limiter MCL A MCL protection circuit is built in The MCL circuit is activated when the difference in current between the output terminal of each amplifier exceeds 100 mA typical 300 mA This level of 100 mA ...

Page 18: ...A6107Q includes three video output amplifiers in one plastic DIL bent SIL 9 pin medium power DBS9MPF package SOT 111 1 using high voltage DMOS technology and is intended to drive the three cathodes of a colour CRT directly To obtain maximum performance the amplifier should be used with black current control 3 Ordering Information Package Type Number Name Description Version TDA6107Q DBS9MPF Plasti...

Page 19: ...current limiting under voltage lockout with hysteresis over voltage protection and thermal shutdown protects the power supply during the normal overload and fault conditions Low current startup and a low power standby mode selected from the secondary circuit completes a comprehensive suite of features The series is provided in a five pin overmolded SIP style package affording dielectric isolation ...

Page 20: ...al input 3 2 Pin function for STR F6654 Pin No Symbol Function Description 1 OCP FB Over current protection detection signal voltage limiting signal input 2 S MOSFET source 3 D MOSFET drain 4 VIN Supply voltage input for control circuit 5 GND Ground 4 Difference between STR G5653 and STR F6654 a Different size STR F6654 is larger b Different pin functions c Different electric characteristics Large...

Page 21: ...surround decoder can be added externally Two general purpose logic output ports I2 C bus control of all functions 2 General Description The TDA9859 provides control facilities for the main and the SCART channel of a TV set Due to extended switching possibilities signals from three stereo sources can be handled 3 Block Diagram 1 For extended bass control the capacitor between CBR L1 and CBR L2 shou...

Page 22: ...Y0 and Y1 and the other side connected to a common input output Z With E LOW one of the two switches is selected low impedance ON state by Sn With E HIGH all switches are in the high impedance OFF state independent of SA to SC VDD and VSS are the supply voltage connections for the digital control inputs SA to SC and E The VDD to VSS range is 3 to 15V The analog inputs outputs Y0 Y1 and Z can swing...

Page 23: ...L LOW state the less positive voltage X STATE is immaterial Fig 17 Schematic Diagram One Switch Ratings Limiting values in accordance with the Absolute Maximum System IEC 134 Supply voltage with reference to VDD VEE 18 to 0 5 V Note To avoid drawing VDD current out of terminal Z when switch current flows into terminals Y the voltage drop across the bidirecctional switch must not exceed 0 4 V If th...

Page 24: ... 5 45 17 Reset 4 96 4 64 4 48 18 Filter 2 76 9 52 5 31 19 Video signal input terminal 3 9 51 5 92 20 Input terminal for vertical flyback pulse 4 74 8 73 5 03 21 Input terminal for horizontal flyback pulse 4 27 8 81 5 01 22 R character output terminal 0 2 08 2 08 23 G character output terminal 0 2 1 2 1 24 B character output terminal 0 2 08 2 08 25 Output terminal for fast blanking signal 0 1 97 1 ...

Page 25: ...line 4 4 7 15 5 15 8 Two way transmission data line 4 52 7 15 5 15 9 Gap decoupling 6 7 7 52 5 68 10 SVHS chroma signal input 1 35 9 6 11 SVHS luminance signal input 3 4 9 04 5 91 12 Supply voltage 8 24 2 78 1 96 13 Composite video signal input terminal 4 32 9 15 5 94 14 Ground 0 0 0 15 Audio signal output 3 9 24 5 98 16 Decoupling capacitor connection 0 17 Video input 3 4 9 12 5 94 18 Black curre...

Page 26: ...4 62 8 52 6 2 49 IF signal input 4 62 8 52 6 2 50 High voltage detection input 2 05 8 04 6 14 51 Vertical sawtooth generation 3 8 8 65 6 09 52 Vertical reference bias setting 3 9 8 89 6 05 53 AGC filter for IF amplifier 4 49 9 25 6 54 AGC output for IF amplifier 0 67 10 05 5 82 55 Audio deemphasis 2 93 8 93 6 12 56 Audio decoupling 4 02 9 37 6 08 Table 6 Functions and Service Data of TDA8350 N401 ...

Page 27: ...tput 7 64 6 48 5 6 9 Ground 0 0 0 10 Left channel inverting signal output 7 71 6 47 5 6 11 Right channel inverting signal output 7 76 6 47 5 6 12 Ground 0 0 0 13 Right channel in phase signal output 7 79 6 48 5 6 Table 8 Functions and Service Data of TDA6107Q NY01 s Pins Digital Multimeter Pin No Function Description Reference Voltage V Positive Resistance K Negative Resistance K 1 G inverting inp...

Page 28: ...io compensation 4 15 7 38 6 12 12 Channel 2 audio compensation 4 15 7 61 6 03 13 Audio output 8 0 14 Treble compensation 4 15 7 48 6 24 15 Audio output 4 13 6 78 5 66 16 Clock line 4 33 7 02 5 25 17 Serial data line 4 53 6 98 5 21 18 Audio output 4 13 6 78 5 65 19 Treble compensation 4 14 7 48 6 24 20 Audio output 0 21 Bass2 compensation 4 15 7 59 6 04 22 Bass1 compensation 4 15 7 37 6 12 23 Audio...

Page 29: ...put 0 12 7 97 5 7 10 Control signal input 0 12 7 99 5 7 11 Control signal input 4 98 7 8 5 6 12 Signal input 0 0 0 13 Signal output 0 9 81 6 15 14 Signal input 0 6 9 6 4 15 0 6 95 6 4 16 Supply voltage 5 09 6 98 4 44 Signal output Table 11 Functions and Service Data of TDQ 6F2M s Pins Digital Multimeter Pin No Function Description Reference Voltage V Positive Resistance K Negative Resistance K 1 A...

Page 30: ...SERVICE MANUAL Waveforms of Key Points IC DATA AND WAVEFORMS OF KEY POINTS continued 28 ...

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Page 34: ...ing a degaussing coil 2 Set the brightness and contrast to maximum 3 Receive the green raster test pattern 4 Loosen the clamp screw holding the deflection yoke and slide it backward or forward to display vertical green belt zone on the screen 5 Remove the rubber wedge 6 Rotate and spread the tabs of the purity magnet around the neck of the CRT until the green belt is on the center of the screen 7 ...

Page 35: ...et interact each other resulting in complicating and dot movement Circumference convergence adjustment 1 Loosen the clamping screw of the defection yoke slightly to allow it to tilt 2 Temporarily put a wedge as shown in Fig 18 Do not remove cover paper on adhesive part of the wedge 3 Tilt front of the deflection yoke up or down to obtain better convergence in circumference Push the mounted wedge i...

Page 36: ...ntrast and colour to obtain natural colour pictures 2 Automatic Degaussing A degaussing coil is mounted around the CRT so that external degaussing after moving the TV is generally unnecessary providing it is properly degaussed upon installation The degaussing coil operates in about 1 second after power on If the set is moved or faced to a different direction the power switch must be switched off f...

Page 37: ...eter to the second anode of the CRT 2 Turn on the TV and set the brightness and contrast to minimum i e set beam current of the CRT to zero 3 The high voltage tested should be 29 0 5KV for 25 TV or 30 0 5KV for 29 TV 4 Set the brightness to minimum or maximum and ensure high voltage not beyond limitation of 30KV For 25 TV or 33KV For 29 TV in any case 5 Focus Adjustment 1 Use the remote control to...

Page 38: ...ription Data Description Data Description Data AFW 240KHz 1 De interta 0 S CORRECT 20 AUTO ADJUST 0 OPT SPKON 0 IF PLL 1 Hshift 40 V SHIFT 32 SUB BRIGHT 27 OPT SPATAL 1 AGC over f 9 Hshift 50 32 V SHIFT 50 32 LOUDNESS 18 OPT COLOR 0 IFS 0 E W WIDE 45 V 200M 25 CNTRST MAX 52 OPT V CHIP 1 MOD 0 PARABOLA 32 V SCROLL 31 CONTRST MID 21 OPT CCD 1 FixedAvd 1 E W CORNER 63 V HALF 0 CNTRST MIN 0 OPT PWR ON...

Page 39: ...English French Spanish 0 FLNG3 Other options are available for TVs to South America 0 OPT STEREO 1 AV stereo TDA9859 0 AV mono 1 OPT SPATAL Surround 1 Yes 0 No 1 OPT S VHS 1 0 for other mode MENU 02 Horizontal scan Blank HOB Upper and lower useless parts of 16 9 image blanked 0 Disable 0 De interla 0 Interlace 1 Non interlace 0 H shift Horizontal center vertical frequency 60Hz 45 Set to the optima...

Page 40: ...de V SHIFT 50 Vertical center vertical frequency 50Hz 31 V ZOOM Vertical amplitude compensation for 16 9 and 4 3 25 V SCROLL Center shift when 16 9 shifted to 4 3 31 MENU 05 RGB WHIT P RED Red bright balance 31 WHIT P GRE Green bright balance 31 Set to the optimal mode WHIT P BLU Blue bright balance 31 Set to the optimal mode AKB Auto white dark balance 1 Y Delay 0ns 320ns step40ns 9 steps unchang...

Page 41: ... brightness 31 AV PRESECL AV output amplitude for BTSC stereo only 75 VOLUME 0 CONTRST MAX Sub contrast Max 63 CONTRST MID Mid 31 CONTRST MIN Min 0 COLOR Core Sub saturation 31 SUB TINT Sub tint 28 MENU 09 Selector BCO AKB start up characteristic 0 Picture displayed without delay 1 Picture displayed through inner delay 1 Horizontal scan crystal oscillator 0 TWO 3 6MHZ 0 1 ONE 3 6MHZ PIN34 2 ONE 4 ...

Page 42: ... 1 ON 1 FCO Color killer 0 Normal 1 Not kill 0 MENU 12 Option switch OPT AV2 1 With AV2 1 OPT AV3 1 With AV3 1 OPT YCbCr YUV component input 1 Yes 0 No 0 OPT COLOR Color system 0 NTSC 1 PAL M N NTSC 1 OPT V CHIP V CHIP 1 Yes 1 OPT CCD CCD 1 Yes 1 OPT PWR ON 0 Soft on 1 Instant on 0 SRCH SPEED 0 Slow search 1 Fast search 0 ROM CORREC ROM correction fixed to 0 0 MSP TDA 1 BTSC MSP3440 0 STEREO MONO ...

Page 43: ... ConnectorA From Left Speaker Wired Connector XPK02 XPA02 XAS01 To Speaker s Positive Wired Connector XS803 From power cord Connected to L Female Connector on Main PCB Assembly Wired Connector XV602 SolderedonCopper foilGroundingLand Wired Connector XPY01 Wired Connector XPY03 XSY03 VDR801 XP800 Wired Connector XP804 XP901A Wired Connector XP803 Main PCB Assembly XS402 XSK02 XSK02 XPK01A Wired Con...

Page 44: ...FINAL WIRING DIAGRAM FOR MCR66R400 ...

Page 45: ...2 Wired Connector XPY01 XPY01 CRTRGBPCBAssembly XPY03 Wired Connector XPY03 XSY03 Wired Connector XP804 XP901A XP800 XS402 Wired Connector XP803 XS402 Wired Connector XPK01 Wired Connector XP205 Red Main PCB Assembly XSY01 Black SideAVPCBAssembly FromDeflectionYoke AV PCB Assembly XS08 Power Switch PCBAssembly XS06 Wired Connector XPK02 Wired Connector XS803 Control PCB Assembly XS803 XP804 XP803 ...

Page 46: ... Wired Connector AD 05 200 Wired Connector AD 04 120 Control PCB Assembly Power Switch PCB Assembly Wired Connector B From Degaussing Coil Power PCB Assembly Wired Connector A Wired Connector XP205 s B Black Red From Deflection Yoke From Ground Wire Soldered From Right Speaker From Left Speaker From Power Cord Wired Connector XPK02 Wired Connector XP205 s A XS804 XS803 XS803 XS804 XPK02 XK02 KK05 ...

Page 47: ...MCR68R420 Main Diagram Chassis CH 10C5 ...

Page 48: ...MCR68R420 A V I O Board Kine Board Power Supply and others Chassis CH 10C5 ...