Citizen JCTV3242 Service Manual
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Citizen JCTV3242 Service Manual

Citizen JCTV3242 Service Manual

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JCTV3242

SERVICE MANUAL

COLOR TELEVISION RECEIVER
ORIGINAL
MFR'S VERSION A
Design and specifications are subject to change without notice.

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Summary of Contents for Citizen JCTV3242

  • Page 1: Service Manual

    JCTV3242 SERVICE MANUAL COLOR TELEVISION RECEIVER ORIGINAL MFR'S VERSION A Design and specifications are subject to change without notice.

  • Page 2: Servicing Notices On Checking

    SERVICING NOTICES ON CHECKING 1. KEEP THE NOTICES 6. AVOID AN X-RAY As for the places which need special attentions, Safety is secured against an X-ray by consider- they are indicated with the labels or seals on the ing about the cathode-ray tube and the high cabinet, chassis and parts.

  • Page 3: Table Of Contents

    CONTENTS SERVICING NOTICES ON CHECKING ....................A1-1 HOW TO ORDER PARTS ........................A1-1 IMPORTANT ............................A1-1 CONTENTS .............................. A2-1 GENERAL SPECIFICATIONS ......................... A3-1~A3-4 DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF ANODE CAP ......................B1-1 2. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ............B2-1, B2-2 SERVICE MODE LIST ..........................

  • Page 4: General Specifications

    GENERAL SPECIFICATIONS CRT Size / Visual Size 20 inch / 480.0mmV System CRT Type Normal Deflection degree Magnetic Field BV/BH +0.45G/0.18G Color System NTSC Speaker 2Speaker Position Front Size 2 x 4.7 Inch Impedance Sound Output 2.5+2.5 W 10%(Typical) 2.0+2.0 W NTSC3.58+4.43 /PAL60Hz Tuning Broadcasting System...
  • Page 5 GENERAL SPECIFICATIONS Contrast Color Tint (NTSC Only) Sharpness Tuning Bass Treble Balance Back Light Stereo,Audio Output,SAP Video Color Stream Channel(TV/Cable) CH Label Sleep Timer Sound Mute V-chip Rating OSD Language English French Spanish OSD Language Setting English Clock and Sleep Timer Max Time 120 Min Timer...
  • Page 6 GENERAL SPECIFICATIONS TV/VCR(VCR) Code Play Stop Cable G-11 Features Auto Degauss Auto Shut Off Canal+ CATV Anti-theft Rental Memory(Last CH) Memory(Last Volume) V-Chip Type Auto Search CH Allocation Tone Control Channel Lock Just Clock Function Game Position CH Label VM Circuit Full OSD Premiere Comb Filter...
  • Page 7 GENERAL SPECIFICATIONS Registration Card PTB Sheet 300 ohm to 75 ohm Antenna Adapter G-13 Interface Switch Front Power System Select Main Power SW Sub Power Channel Up/Reset Channel Down/Enter Volume Up/Set Up Volume Down/Set Down MENU=Volume Up+Volume Down Rear AC/DC TV/CATV Selector Degauss Main Power SW...

  • Page 8: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 3. After one side is removed, pull in the opposite direction to 1. REMOVAL OF ANODE CAP remove the other. Read the following NOTED items before starting work. NOTE After turning the power off there might still be a potential Take care not to damage the Rubber Cap.

  • Page 9: Removal And Installation Of Flat Package Ic

    DISASSEMBLY INSTRUCTIONS REMOVAL AND INSTALLATION OF When IC starts moving back and forth easily after desoldering completely, pickup the corner of the IC using FLAT PACKAGE IC a tweezers and remove the IC by moving with the IC desoldering machine. (Refer to Fig. 2-3.) REMOVAL NOTE Put the Masking Tape (cotton tape) around the Flat...
  • Page 10 DISASSEMBLY INSTRUCTIONS INSTALLATION When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thin- Take care of the polarity of new IC and then install the tip Soldering Iron. (Refer to Fig. 2-8.) new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily.

  • Page 11: Service Mode List

    SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter the Service Mode, press both set key and remote control key for more than 1 second. Set Key Remocon Key Operations Releasing of V-CHIP PASSWORD.

  • Page 12: When Replacing Eeprom (Memory) Ic

    WHEN REPLACING EEPROM (MEMORY) IC If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1. Table 1 Enter DATA SET mode by setting VOLUME to minimum.

  • Page 13: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS BEFORE MAKING ELECTRICAL 2. BASIC ADJUSTMENTS ADJUSTMENTS 2-1: RF AGC Read and perform these adjustments when repairing the Place the set with Aging Test for more than 15 minutes. circuits or replacing electrical parts or PCB assemblies. Receive an 63dB monoscope pattern. Connect the digital voltmeter to the W062.
  • Page 14 ELECTRICAL ADJUSTMENTS 2-6: SUB TINT/SUB COLOR 2-8: VERTICAL SIZE NOTE: Adjust after performing adjustments in section 2-8. Receive the color bar pattern. Connect the oscilloscope to TP024. Receive the monoscope pattern. Activate the adjustment mode display of Fig. 1-1 and Using the adjustment control, set the brightness and press the channel button (22) on the remote control to contrast to normal position.
  • Page 15 ELECTRICAL ADJUSTMENTS 2-12: SEPARATION 1, 2 Please do the method (1) or method (2) adjustment. Method (1) Set the multi-sound signal generator for each different L-ch and R-ch frequency (Ex. L-ch=2KHz, R-ch=400Hz) and receive the RF. Connect the oscilloscope to the pin 6 and pin 7 of CP601. Activate the adjustment mode display of Fig.

  • Page 16: Purity And Convergence

    ELECTRICAL ADJUSTMENTS 3-3: STATIC CONVERGENCE PURITY AND CONVERGENCE ADJUSTMENTS NOTE Adjust after performing adjustments in section 3-2. NOTE Receive the crosshatch pattern from the color bar Turn the unit on and let it warm up for at least 30 generator. minutes before performing the following adjustments.
  • Page 17 ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) CRT PCB CP806 CP701A TP024 TP022 J801 J702 AV PCB CP801 CD801 CP802A CP601_1 FB401 TP402 CP701B CP401_1 IC901 T501 CP1001 SPEAKER S501A S501B SYSCON PCB...

  • Page 18: Block Diagram

    BLOCK DIAGRAM SOUND DECORDER IC IC901 AN5829S TUNER VIDEO SIGNAL 22 21 24 18 19 AUDIO SIGNAL DEFLECTION SIGNAL B. SIGNAL R. SIGNAL G. SIGNAL Q1001 MUTE SW TU001 CHROMA IC IC1001 AN7522 IC601 M61206FP SOUND SP1002 51 AUDIO OUT AMP IC SP1001 RF AGC OUT...

  • Page 19: Printed Circuit Boards

    PRINTED CIRCUIT BOARDS MAIN/CRT/AUDIO (INSERTED PARTS) SOLDER SIDE OS101 SW104 SW103 SW102 SW101 SW105 R140 Q405 R626 W819 D616 CP701A J702 D613 FH502 FH501 R504 F501 D615 S501B R613 S501A R627 W816 Q607 R631 R114 R617 R630 W040 Q609 W811 L501 R640 R139...

  • Page 20: Main/Crt

    PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) SOLDER SIDE R141 R534 R532 R533 R437 R733 C513 IC901 C909 R903 R907 C1004 R1008 R1006 R615 R622 C618_1 C602 C655 R628 C606 R646 C801 R809 R619 R122 R104 C140 R129 R134 C103 R118 R602 IC101...

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