Service Manuals, User Guides, Schematic Diagrams or docs for : RCA TV Chassis 10C5 RCA-MCR61TF30-CH-10C5

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RCA-MCR61TF30-CH-10C5


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                                               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.
                                                     SERVICE MANUAL


                                      TABLE OF CONTENTS

SAFETY INSTRUCTIONS AND MAINTENANCE........................................................... 1
 X-Ray Radiation Precaution......................................................................................... 1
 Safety Precaution......................................................................................................... 1
 Product Safety Notice .................................................................................................. 2
 Maintenance ................................................................................................................ 2

KEY ICS AND ASSEMBLIES ......................................................................................... 3

BLOCK DIAGRAMS FOR CHASSIS .............................................................................. 4
 Structure Block 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. Printed Circuit Board Diagrams




                                                                  1
                                          SERVICE MANUAL


                 SAFETY INSTRUCTIONS AND MAINTENANCE

WARNING: BEFORE SERVICING THIS CHASSIS, READ THE                    X-RAY RADIATION PRECAUTION ,
  SAFETY PRECAUTION             AND   PRODUCT SAFETY NOTICE             INSTRUCTIONS-BELOW.


X-RAY RADIATION PRECAUTION
1. The EHT must be checked every time the receiver is serviced to ensure that the CRT does not emit
    X-ray radiation as result of excessive EHT voltage. The nominal EHT for this receiver is 29KV (for
    25"TV) or 30KV (for 29"TV) at zero beam current (minimum brightness) operating at AC 120V. The
    maximum EHT voltage permissible in any operating circumstances must not exceed 32KV (for
    25"TV) or 33KV (for 29"TV). When checking the EHT, use the High Voltage Check procedure in this
    manual using an accurate EHT voltmeter.
2. The only source of X-RAY radiation in this receiver is the CRT. To prevent X-ray radiation, the
    replacement CRT must be identical to the original fitted as specified in the Parts List.
3. Some components used in this receiver have safety related characteristics preventing the CRT
    from emitting X-ray radiation. For continued safety, replacement component should be made after
    referring the PRODUCT SAFETY NOTICE below.

SAFETY PRECAUTION
1. The receiver has a nominal working EHT voltage of 29KV (for 25"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 CRT, if broken, will violently expel glass fragments. Use shatterproof goggles and take extreme
   care while handling.
4) Do not hold the CRT by the neck as this is a very dangerous practice.
2. It is essential that to maintain the safety of the customer all power cord forms be replaced exactly
    as supplied from factory.
3. Voltage exists between the hot and cold ground when the TV is in operation. Install a separation
    transformer during repairing or connecting to any testing equipment for the sake of safety. The
    power of the separation transformer should exceed the rated overall power.
4. Replace blown fuses within the receiver with the fuse specified in the parts list.
5. When replacing wires or components to terminals or tags, wind the leads around the terminal
    before soldering. When replacing safety components identified by the international hazard symbols
    on the circuit diagram and parts list, it must be the company-approved type and must be mounted
    as the original.
6. Keep wires away from high temperature components.



                                                    1
                                            SERVICE MANUAL


PRODUCT SAFETY NOTICE
Many electrical and mechanical components in this chassis have special safety-related characteristics.
These characteristics are often passed unnoticed by a visual inspection and the X-ray radiation
protection afforded by them cannot necessarily be obtained by using replacements rated at higher
voltages or wattage, etc. Components which have these special safety characteristics in this manual
and its supplements are identified by the international hazard symbols in the circuit diagram and parts
list. Before replacing any of these components read the parts list in this manual carefully. Substitute
replacement components which do not have the same safety characteristics as specified in the parts
list may create X-ray radiation.


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.
      FDA This symbol tells you 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 stable stand or base that is of adequate size and strength to prevent it from
    being accidentally tipped over, pushed off, or pulled off. Do not place the set near or over a radiator
    or heat register, or where it is exposed to direct sunlight.
2. Do not install the TV set in a place exposed to rain, water, excessive dust, mechanical vibrations or
    impacts.
3. Allow enough space (at least 10cm) between the TV and wall or enclosures for proper ventilation.
4. Slots and openings in the cabinet should never be blocked by clothes or other objects.
5. Please power off the TV set and disconnect it from the wall immediately if any abnormal condition
    are met, such as bad smell, belching smoke, sparkling, abnormal sound, no picture/sound/raster.
    Hold the plug firmly when disconnecting the power cord.
6. Unplug the TV set from the wall outlet before cleaning or polishing it. Use a dry soft cloth for
    cleaning the exterior of the TV set or CRT screen. Do not use liquid cleaners or aerosol cleaners.




                                                         2
                                  SERVICE MANUAL

KEY ICS AND ASSEMBLIES

                       Table 1 Key ICs and Assemblies
      Serial No.         Position No.          Model No.       Function Description
          1                 N301             OM8839PS          Small signal processor
          2                 N401             TDA8350Q          Vertical output circuit
          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
                          SERVICE MANUAL


BLOCK DIAGRAMS FOR CHASSIS
Structure Block Diagram




                                4
5
                                                               Block Diagram for Supply Voltage System
                                                                                                         SERVICE MANUAL




    Fig.2 Block Diagram for CH-10C1(S) Supply Voltage System
                             SERVICE MANUAL

Black Diagram for Remote Control Structure




                                     6
                              SERVICE MANUAL

Block Diagram for Video Signal Processor




                                     7
                                  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
                                          SERVICE MANUAL



2. Terminal Function
                                   Table 2 Terminal Function Table
 Terminal   I/O                    Function Description                   Option        Format
 VSS         -    Negative power supply
 XT1        1     Input terminal for crystal oscillation
 XT2        O     Output terminal for crystal oscillation
 VDD         -    Positive power supply
 RES         I    Reset terminal                                                          A
 FILT       O     Charge-pump output terminal                                             N
                  Image signal input terminal
 CVIN        I    (available only in CH04T1002)                                           M

 VS          I    Vertical synchronization signal input terminal
                                                                                          A
 HS          I    Horizontal synchronization signal input terminal

 R          O     Red (R) output terminal of RGB image

 G          O     Green (R) output terminal of RGB image
 B          O     Blue (B) output terminal of RGB imagee                                  O
 I          O     Intensity (I) output terminal of RGB image
                  Fast blanking control signal
 RL         O     Switch TV image and caption/OSD image signal
                    8-bit input/output port                          Pull-up resistor
 Part 0             Input/output can be specified in nibble unit     provided/not
                    Other functions:                                 provided
            I/O                                                                           E
                    Hold release input                               Output format
 P00-P07            Internal input                                   CMOS/Nch-OD
 Port 1             8-bit input/output port
                    Each bit can be independently programmable
                    Other functions:
                       P10    SIO0 data output
                       P11    SIO0 data input/bus input/output       Output format
            I/O        P12    SIO0 clock input/output                                     F
                                                                     CMOS/Nch-OD
 P10-P17               P13    PWM1 output
                       P14    PWM2 output
                       P15    PWM3 output
                       P17    Timer 1(PWM) output

                    4-bit input/output port
                    Each bit can be independently programmable
                    Other functions:
                       P60    IIC0 data input/output
 Port 6     I/O        P61    IIC0 clock output
                       P62    IIC1 data input/output
                       P63    IIC1 clock output




                                                    9
                                              SERVICE MANUAL




 Terminal    I/O                         Function Description                     Option   Format
                     4-bit input/output port
 Port 7              Each bit can be independently programmable
                     Other functions:
                              INTO input/HOLD release input
                      P70
                              /Nch-Tr. output for watchdog timer
                      P71 INT1 input/HOLD release input
                      P72 INT2 input/timer 0 event input
                              INT3 input (noise rejection filter attached                    P70
                      P73
                              input)/timer 0 event input                                     W
             I/O     Interrupt receiver format vector address                              P71-P73
 P71-P73                                      Rising
                                                         H         L                          V
                            Rising Falling       /                       Vector
                                              Falling level      level
                    INTO     yes        yes     no         yes   yes     03H
                    INT1     yes        yes     no         yes   yes     0BH
                    INT2     yes        yes     yes        no    no      13H
                    INT3     yes        yes     yes        no    no      1BH

 Port 8              1-bit input port
                                                                                            P83
                     (P83 is set only in CH04T1002)
                                                                                              B
              I      4-bit input/output port(P84-P87)
 P83
             I/O     Each bit can be independently programmable
 P84-P87                                                                                   P84-P87
                     Other function:
                                                                                              X
                     AD converter input port


  Port options can be specified independently for each bit.
 The programmable pull-up resistors are provided depending on whether CMOS or Nch-OD (Nch open
  drain ) is selected as the port 1 option.
3. Refer to Table 3 about Functions and Data of the IC's Each Pin.




                                                      10
                                      SERVICE MANUAL


EEPROM AT24C04 (N002)
1. Features                                          2. Pin Configuration
      Data EEPROM internally organized as 512
      bytes and 32 pages



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