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Casio TV-350C Service Manual & Parts List

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(without price)
POCKET TELEVISION
TV-350C
OCTOBER 1994
Page
Specifications............................................................................................. 2
Block Diagram ........................................................................................... 3
Linear PCB......................................................................................... 4
Printed Circuit Boards ................................................................................ 8
Wiring Diagram ........................................................................................ 10
Electrical Parts List .................................................................................. 11
Mechanical Parts List............................................................................... 17
Exploded Views / Disassembly ................................................................ 18
Schematic Diagrams and Waveforms ..................................................... 19
INDEX
R

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  Summary of Contents for Casio TV-350C

  • Page 1: Table Of Contents

    (without price) POCKET TELEVISION TV-350C OCTOBER 1994 Page Specifications..................... 2 Block Diagram ................... 3 Adjustment Linear PCB..................4 Printed Circuit Boards ................8 Wiring Diagram ..................10 Electrical Parts List .................. 11 Mechanical Parts List................17 Exploded Views / Disassembly ..............18 Schematic Diagrams and Waveforms .............
  • Page 2: Specifications

    SPECIFICATIONS Item Specification Reception Channels VHF: Ch 2 ~ 12 ch UHF: Ch 21 ~ 69 Power Voltage DC 6.0 V Power Consumption Approx. 3.0 W Current Consumption Approx. 500 mA Battery Life (with alkaline batteries) Approx. 3.0 hours Batteries : 4 AA size batteries Power Supply Car adaptor : CA-K65...
  • Page 3: Block Diagram

    BLOCK DIAGRAM Antenna 3 IC200 1 TU200 2 Q200 4 IC600 Speaker Video VR600 Sound Det. Audio Tuner IF Amp. Amp. AFT Circuit Volume AGC Circuit Control IC500 IC300 Tuning Voltage Common Chroma Generator Driver Circuit IC700 Display Segment Control Driver A-D Converter Auto-Tuning...
  • Page 4: Adjustment

    ADJUSTMENT Linear PCB 1) Items to Be Adjusted Item Measuring Instrument VCC2 voltage setting Voltmeter Video detection coil adjustment TV signal generator, Pattern generator, Oscilloscope, Low-pass filter AFT coil adjustment Sweep generator, Oscilloscope, Voltmeter Contrast adjustment TV signal generator, Pattern generator, Oscilloscope AGC adjustment TV signal generator, Pattern generator, IF levelmeter Clock adjustment...
  • Page 5 BOTTOM VIEW VR200 Pad IF VR700 VR301 VR300 3) Equipment Connection / Procedure VCC2 Voltage Setting TV-350 Voltmeter Output Input Input Input Output Output Adjust Result Connection Point Signal Connection Point Adjust for 3.95 ± 0.02V VR100 Voltmeter reading on voltmeter. —...
  • Page 6 Video Detection Coil Adjsutment * Open soldering pad IF. Pattern Signal TV-350 Oscilloscope generator generator Low-pass filter Input Output R=180 ohm C=0.01 µF Input Input Input Output Output Adjust Result Connection Point Signal Connection Point Pattern Color bar generator Low-pass filter Adjust for DC level at mini- 38.9MHz T200...
  • Page 7 AGC Adjustment Pattern Signal TV-350 generator generator IF levelmeter Input Output Input Input Input Output Output Adjust Result Connection Point Signal Connection Point Pattern Adjust for 81 ± 1 dBµ reading generator Color bar VR200 IF levelmeter on the IF levelmeter 65 ±...
  • Page 8: Printed Circuit Boards

    PRINTED CIRCUIT BOARDS Linear PCB PW PCB (Top View) (Top View) C180 C182 C202 C210 C208 C299 C207 TU200 R607 C808 T950 R606 C205 C135 Q100 IC600 C806 VR100 Q101 R100 C530 C145 D100 C112 R222 C600 R117 R500 R502 R241 C259 R223...
  • Page 9 PW PCB Linear PCB (Bottom View) (Bottom View) R645 JK200 JK101 VR200 JK600 R220 C606 C235 C603 C232 R204 C239 R202 C100 R205 R203 VR600 C245 R111 R950 C103 C925 C246 R212 C140 IC200 C550 R115 R550 D154 L101 C110 IC500 C261 C264 VR800...
  • Page 10: Wiring Diagram

    WIRING DIAGRAM PW PCB KY PCB Linear PCB — 10 —...
  • Page 11: Electrical Parts List

    ELECTRICAL PARTS LIST Linear PCB Assembly NO. 1 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price Capacitors C202 2800 9182 Electrolytic 6.3RC2-47MS C205 2804 9765 Electrolytic 50RC2-2R2 C207 2800 9182 Electrolytic 6.3RC2-47MS C208 2800 9182 Electrolytic 6.3RC2-47MS C210 2804 9064 Electrolytic 16RC2-10...
  • Page 12 Linear PCB Assembly NO. 2 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price C765 2897 0553 Chip GR40Y5V224Z16PT C800 2800 9182 Electrolytic 6.3RC2-47MS C806 2800 9945 Electrolytic 50RC2-4R7MS C808 2804 9765 Electrolytic 50RC2-2R2 C810 2804 9212 Electrolytic 50RC2-1 C840 2897 0126 Chip...
  • Page 13 Linear PCB Assembly NO. 3 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price R208 Not Used R209 2791 0313 Chip ERJ-6GEYJ103V R210 2791 0305 Chip ERJ-6GEYJ472V R212 2791 0720 Chip ERJ-6GEYJ222V R214 2791 0769 Chip ERJ-6GEYJ563V R220 2792 0110 Chip jumper ERJ-6GEYOR00V R222...
  • Page 14 Linear PCB Assembly NO. 4 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price R808 2791 1595 Chip ERJ-6GEYJ153V R809 2791 1595 Chip ERJ-6GEYJ153V R810 2791 1595 Chip ERJ-6GEYJ153V R815 2791 2079 Chip ERJ-6GEYJ562V R816 2791 0750 Chip ERJ-6GEYJ223V R817 2791 0750 Chip...
  • Page 15 PW PCB Assembly NO. 1 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price Capacitors C100 2801 8953 Electrolytic 10RC2-220 C103 2800 9182 Electrolytic 6.3RC2-47MS C110 2804 9064 Electrolytic 16RC2-10 C112 2805 8777 Electrolytic 6.3RC2S-100-T36 C113 2805 8777 Electrolytic 6.3RC2S-100-T36 C114 2800 9945 Electrolytic...
  • Page 16 PW PCB Assembly NO. 2 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price Resistors R100 2797 0014 Chip ERJ-6GEYJ821V R101 2791 1633 Chip ERJ-6GEYJ123V R111 2791 0815 Chip ERJ-6GEYJ102V R115 2791 2117 Chip ERJ-6GEYJ820V R117 2791 0696 Chip ERJ-6GEYJ470V R183 2792 0110 Chip jumper...
  • Page 17: Mechanical Parts List

    MECHANICAL PARTS LIST FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price 3851 1267 Rod antenna YH810721 5860 4634 Precision (+) tap tight BT3,1.7x6.5 NI 5860 8036 Precision (+) tap tight BT3,1.7x3.5 Bk 6605 0011 Flat screw A-K333 K410096A-1 6608 7990 Switch knob A-K546 K311397-1...
  • Page 18: Exploded Views / Disassembly

    EXPLODED VIEWS / DISASSEMBLY 33-8 33-1 33-2 33-7 33-5 33-4 33-3 34-1 1. Slide the battery cover 0. 2. Remove 6 screws 2, 4 and 3. 3. Remove rod antenna 1. 4. Remove lower case 9. — 18 —...
  • Page 19: Schematic Diagrams And Waveforms

    SCHEMATIC DIAGRAMS AND WAVEFORMS Linear PCB VHF(L) VHF(H) 3.8V 20.8V TP3 TP4 3.8V 3.8V 3.8V 3.8V 3.8V Pad IF — 19 —...
  • Page 20 PW PCB — 20 —...
  • Page 21 KY PCB SP600 2803BFB CN700 HP601 – XXXX CP601 HP602 SP– CP701 CP702 Vcc2 DOWN CP700 GND to CHASSIS — 21 —...
  • Page 22 WAVEFORMS 63.5µsec 63.5µsec 63.5µsec 1 Q200 Collector 2 IC200 Pin 19 3 IC200 Pin 18 0.3µsec 63.5µsec 63.5µsec 4 IC300 Pin 23 5 IC300 Pins 10,11,12 6 IC300 Pin 5 4.4µsec 63.5µsec 63.5µsec 7 IC300 Pin 4 8 IC300 Pin 1 9 Q111 Collector 4.4µsec 140nsec...
  • Page 23 8-11-10, Nishi-Shinjuku Shinjuku-ku, Tokyo 160, Japan Telephone: 03-3347-4926...