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Related Manuals for Casio EV-2500B
Summary of Contents for Casio EV-2500B
- Page 1 (with price) EV-2500B (KX-618) MAY. 1995 INDEX...
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Page 2: Table Of Contents
CONTENTS SPECIFICATIONS ..................2 BLOCK DIAGRAM ..................3 CIRCUIT DESCRIPTION ................4 DISASSEMBLY ..................... 5 DIAL STRINGING DIAGRAM ................ 6 ADJUSTMENT ....................7 TROUBLESHOOTING ................. 12 PRINTED CIRCUIT BOARDS ..............13 EXPLODED VIEW ..................15 ELECTRICAL PARTS LIST................. 16 MECHANICAL PARTS LIST ............... 23 IC AND TRANSISTOR LEAD IDENTIFICATION ........ -
Page 3: Specifications
SPECIFICATIONS Item Specification Reception channels TV— VHF: 2 ~ 13 ch UHF: 14 ~ 69 ch RADIO— FM: 88~108 MHz AM: 530~1710 KHz Power voltage DC 6.0 V Power consumption Approx. 3.5 W Current consumption Approx. 580 mA Battery life (with alkaline batteries) Approx. -
Page 4: 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 IC270 IC300 Tuning Voltage Chroma Generator Circuit IC700 Display Control Auto-Tuning Control VCC1 (4.5 ± 0.05 V) VCC2 (4.5 ±... -
Page 5: Circuit Description
CIRCUIT DESCRIPTION POWER SUPPLY L103 VCC2-3 (4.5 V) 100u L102 VCC2-2 (4.5 V) 100u T100 D158 MA143A CP105 VCC7 (25.9 ~ 31.3 V) R160 LC12U-35 CP110 C146 VCC6 (10.0 ~ 12.0 V) OPEN Q110 2SD1819A-R CP111 D156 MA141K Q111 L101 VCC2-1 (4.5 V) 2SD1119-R D100... -
Page 6: Disassembly
DISASSEMBLY 1. Remove the battery case. 2. Remove the three screws and the lower case. 3. Remove the three knobs. 4. Remove the screw and resolder the two wires for the speaker. 5. Remove the PCB ass'y. — 5 —... -
Page 7: Dial Stringing Diagram
DIAL STRINGING DIAGRAM Turn the pulley counterclockwise. Sliding pointer 0.8 mm Wrap around 4 times. — 6 —... -
Page 8: Adjustment
ADJUSTMENT Items to Be Adjusted Item Measuring Instrument VCC2-1 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 Tint adjustment TV signal generator, pattern generator, oscilloscope AGC adjustment TV signal generator, pattern generator, IF levelmeter... - Page 9 IF Pad TP7(CP204) TP2(CP201) TP4(CP217) TP3(CP218) TP8(CP320) TP5(CP323) TP6(CP311) TP1(CP113) Bottom View Equipment Connection / Adjustment Procedure VCC2-1 Voltage Setting EV-2500 16-169 Voltmeter Output Input Input Input Output Output Adjust Result Connection Point Signal Connection Point Adjust to obtain a 4.50 ± 0.02 V VR100 Voltmeter reading on the voltmeter.
- Page 10 Video Detection Coil Adjustment * Desolder the IF pad to open. EV-2500 Pattern Signal generator generator Oscilloscope Low-pass filter Input Output Input Input Input Output Output Adjust Result Connection Point Signal Connection Point Pattern Color bar generator Low-pass filter Adjust to obtain the minimum 45.75 MHz T200 Oscilloscope...
- Page 11 Tint Adjustment * Desolder the IF pad to open. Pattern Signal EV-2500 generator generator Oscilloscope CP204 Input Output CP717 Input Input Input Output Output Adjust Result Connection Point Signal Connection Point Adjust VR301 so that the Pattern Color bar difference Pulse A Pulse B generator...
- Page 12 Vcom Adjustment * Place a photo diode on the middle of the display plate. Photo sensor amp. EV-2500 Oscilloscope Photo Bandpass diode filter AV-C1 Audio/Video jack Input Input Input Output Output Adjust Result Connection Point Signal Connection Point Photo sensor Adjust to obtain the minimum amp.
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Page 13: Troubleshooting
TROUBLESHOOTING Symptom Cause Solution No power supply Defective power switch (SW100). Replace. No picture and Defective DC-DC converter (T100). Replace. no sound Defective tuner (TU200). Replace. Defective Q200. Replace. Defective IC200. Replace. Defective IC300. Replace. Defective IC270. Replace. Defective IC700. Replace. -
Page 14: Printed Circuit Boards
PRINTED CIRCUIT BOARDS L500 D500 R500 D520 R501 C532 TU200 H300 R214 R223 R210 C791 VR200 R236 T201 R739 C259 L790 C744 R238 R717 T200 Q760 C250 R226 VR303 R324 C771 R229 C746 R740 C751 Q510 R227 C310 C773 R704 C770 R776 R321... - Page 15 Bottom view — 14 —...
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Page 16: Exploded View
EXPLODED VIEW 25-5 33-3 26-1 25-6 26-2 25-2 33-1 26-3 25-1 28-2 25-4 25-3 26-4 28-1 28-3 26-7 33-2 26-6 28-4 28-3 26-5 28-2 28-3 — 15 —... -
Page 17: Electrical Parts List
ELECTRICAL PARTS LIST Linear PCB No. 1 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price Capacitors C100 2800 9175 Electrolytic capacitor (V) 6.3RC2-220MS 1 20 C105 2845 4802 Chip capacitor EMK316F225Z-T 1 20 C110 2806 9462 Electrolytic capacitor (V) 25RC2-10MS-G10 1 20 C112... - Page 18 Linear PCB No. 2 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price C315 2828 5516 Electrolytic capacitor (V) 16RC2-47MS 1 20 C350 2892 0059 Chip capacitor GR40Y5V103Z50PT 1 20 C351 2892 0059 Chip capacitor GR40Y5V103Z50PT 1 20 C352 2892 0059 Chip capacitor GR40Y5V103Z50PT...
- Page 19 Linear PCB No. 3 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price C788 2892 0059 Chip capacitor GR40Y5V103Z50PT 1 20 C790 2892 0059 Chip capacitor GR40Y5V103Z50PT 1 20 C791 2892 0059 Chip capacitor GR40Y5V103Z50PT 1 20 C794 2892 0040 Chip capacitor GR40Y5V104Z25PT 1 20...
- Page 20 Linear PCB No. 4 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price L310 3013 1092 Chip inductor NLC322522-470K-TP 1 20 L500 3013 1897 Chip inductor LK2125-R56K-TP 1 20 L756 3013 1911 Chip inductor LK2125-330K-TP 1 20 L760 3013 1848 Chip inductor BK2125HS601-T 1 20...
- Page 21 Linear PCB No. 5 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price R224 2795 3829 Chip resistor ERJ-6GEYJ302V 1 20 R225 2791 2109 Chip resistor ERJ-6GEYJ393V 1 20 R227 2791 0313 Chip resistor ERJ-6GEYJ103V 1 20 R229 7102 2313 Chip resistor ERJ-6GEYJ202V 1 20...
- Page 22 Linear PCB No. 6 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price R515 2791 1633 Chip resistor ERJ-6GEYJ123V 1 20 R516 2791 0720 Chip resistor ERJ-6GEYJ222V 1 20 R530 2791 0607 Chip resistor ERJ-6GEYJ333V 1 20 R535 2791 1595 Chip resistor ERJ-6GEYJ153V 1 20...
- Page 23 Linear PCB No. 7 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price SW701 3412 0469 Switch SKHHLN 1 20 SW702 3412 0469 Switch SKHHLN 1 20 Coils and Converter T100 3065 0518 DC-DC converter LC12U-35 T200 3841 0721 Coil 5KVC-07A 1 10 T201...
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Page 24: Mechanical Parts List
MECHANICAL PARTS LIST FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price Upper case 6609 8800 Shutter A-K618 K240113-2 6610 0560 Display plate BIA-K618 K340119-2 6600 9740 Adhesive tape A-K60 K4332-1 4 20 6609 8680 Display plate holder A-K618 K140051-2 6609 8690 Shutter stopper K618 K340112-1... - Page 25 FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price 3312 0035 Micro lamp BQ121-20120A 6609 8610 Sliding pointer A-K618 K340096-1 1 20 Radio unit 6610 1893 Radio PCB unit K440248A*2 1,220 33-1 6609 8550 Pulley A-K618 K340118-1 1 20 33-2 6609 8560 Screw K440196-1...
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Page 26: Ic And Transistor Lead Identification
IC AND TRANSISTOR LEAD IDENTIFICATION IC/LSI IC200 IC270 M51348FP BA10358F IF AGC OUT IF AGC ADJ OUT1 IF AGC IN SyOUT –IN1 OUT2 RF AGC SyIN +IN1 IN2– AGCDL AFTC IN2+ VCCv IFIN IC600 NJM2070M IFIN VIDEO GNDv VCCs SIFOUT SIFIN –IN GNDs... - Page 27 IC700 MSM6770GS TU PWM VBAR TSI6 UBAR TSI5 TSI4 VMUTEB TSI3 GRES GPCK CSYNC GSRT AFTO VDD3 HCNT VSS3 TRANSISTORS 2SD1119 2SB1218A 2SC4238 2SD1819A DTC144EUW DTA143TUW — 26 —...
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Page 28: Schematic Diagrams
SCHEMATIC DIAGRAMS IF Pad 14 15 Notes: 1. All resistance values are indicated in "ohms" (k=10 ohms, M=10 ohms). µF). 2. All capacitance values are indicated in "µF" (p=10 3. All inductance values are indicated in "µH." — 27 —... - Page 29 RADIO Notes: 1. All resistance values are indicated in "ohms" (k=10 ohms, M=10 ohms). µF). 2. All capacitance values are indicated in "µF" (p=10 3. All inductance values are indicated in "µH." — 28 —...
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Page 30: Waveforms
WAVEFORMS 63.5 µs 63.5 µs 63.5 µs 1 Q200 collector 2 IC200 pin 23 3 IC200 pins 19, 20 63.5 µs 63.5 µs 63.5 µs 5 IC300 pins 32, 34, 36 6 IC300 pin 21 4 IC200 pin 18 125 µs 10 µs 10 µs 7 IC300 pin 39... - Page 31 63.5 µs 125 µs F IC700 pin 7 G IC300 pin 30 — 29 —...
- Page 32 8-11-10, Nishi-Shinjuku Shinjuku-ku, Tokyo 160, Japan Telephone: 03-3347-4926...