Casio EV-2500C Service Manual & Parts List Download | Manualshive

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Vcom Adjustment

* Place a photo diode on the middle of the display plate.

EV-2500

set

Photo
diode

ON

OFF

H
M
L

AV-C1

Audio/Video jack

Bandpass
filter

Oscilloscope

Photo sensor amp.

Adjust to obtain the minimum
ripple.

VR303

Photo sensor
amp.
Bandpass filter
Oscilloscope

Free-Running Frequency Adjustment

Frequency
counter

VR740

TP6

Output

TP6

Adjust to obtain a reading of
15.625

±

0.1 kHz.

Adjust

Result

Input

Input

Input

Output

Output

Connection Point

Signal

Connection

Point

EV-2500

set

Frequency

counter

«
...
10
11
12
13
14
...
»

Summary of Contents for EV-2500C

Page 1: ...R without price EV 2500C I N KX 618C I N JUL 1995 INDEX ...

Page 2: ... 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 25 SCHEMATIC DIAGRAMS 27 WAVEFORMS 29 ...

Page 3: ...rs Batteries 3 D size batteries 6 Power supply Car adaptor CA K65 AC adaptor AD K65 64 Earphone jack 3 5ø mini 7 Connection terminals External power jack 6 0 V DC IN External antennea jack 3 5ø mini Audio Video jack 3 5ø 8 Screen size 2 5 inches 9 No of picture element 61 380 220 279 dots 10 Dimensions 115 W 61 7 D 112 H mm 4 1 2 W 2 2 5 D 4 2 5 H 11 Weight 360 g excepting batteries 12 7 oz except...

Page 4: ...C600 NJM2070M Sound amplification 5 Chroma circuit IC300 IR3P90Y Generates the tricolor red green and blue from the video signal 6 Display control Auto tuning control IC700 MSM6770GS Controls the display 7 Tuning voltage generator IC270 BA10358F Generates the tuning voltage with the tuning pulse output from 6 Antenna 1 TU200 2 Q200 3 IC200 7 Tuning Voltage Generator VR600 Volume Control 4 IC600 Sp...

Page 5: ...C110 25 V 10 C112 10SL6R8M C114 6SL 15M C116 6 3 V 100 C118 16 V 22 C120 35 V 22 R161 33K VEE2 18 4 16 0 V L102 100u R100 0R00 GND CP112 1 2 3 VEE1 8 0 7 0 V VCC2 1 4 5 V VCC6 10 0 12 0 V VCC7 25 9 31 3 V VCC2 2 4 5 V VCC2 3 4 5 V Figure 1 CIRCUIT DESCRIPTION Name Voltage Function VCC2 1 4 50 0 02 V Main voltage VCC7 25 9 31 3 V Tuning voltage VCC6 10 0 12 0 V Display voltage VEE1 8 0 7 0 V Displa...

Page 6: ... 5 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 ...

Page 7: ... 6 DIAL STRINGING DIAGRAM 9 2 1 0 3 8 4 A 5 7 6 Turn the pulley counterclockwise Wrap around 4 times 0 8 mm Sliding pointer ...

Page 8: ...justment TV signal generator pattern generator oscilloscope Tint adjustment TV signal generator pattern generator oscilloscope AGC adjustment TV signal generator pattern generator IF levelmeter Vcom adjustment Photo diode photo sensor amp bandpass filter oscilloscope Free Running frequency adjustment Frequency counter RADIO When the radio is defect replace the radio PCB unit Adjustment and Test Po...

Page 9: ...nnection Point Adjust Result Adjust to obtain a 4 50 0 02 V reading on the voltmeter Voltmeter VR100 TP1 TP1 16 169 Equipment Connection Adjustment Procedure Output Voltmeter EV 2500 set Bottom View TP7 CP208 TP2 CP201 TP4 CP217 TP3 CP218 TP1 CP113 TP8 CP334 TP5 CP339 TP6 CP322 IF Pad ...

Page 10: ...loscope Sweep generator Pattern generator Signal generator Input TP2 CP312 KILLER Oscilloscope EV 2500 set 10 kohm Adjust so that the step form wave becomes 2 8 0 1 Vp p Adjust to obtain the minimum DC level Low pass filter Oscilloscope Input TP2 EV 2500 set Output TP3 Low pass filter Pattern generator Signal generator Oscilloscope Sweep generator EV 2500 set Input TP2 Output TP4 Voltmeter Oscillo...

Page 11: ...ses A and B is less than 0 1 V AGC Adjustment Signal generator Pattern generator EV 2500 set IF levelmeter Input TP7 Output TP2 Short the IF pad Pattern generator TV signal generator TP7 VR200 IF levelmeter TP2 Color bar 65 5 dBµ Adjust to obtain a 84 2 dBµ reading on the IF levelmeter Vcom Adjustment EV 2500 set Oscilloscope Output TP8 Color bar 38 9 MHz EV 200C I N 39 5 MHz EV 200D 70 3 dBµ 5 0 ...

Page 12: ...Oscilloscope Photo sensor amp Adjust to obtain the minimum ripple VR303 Photo sensor amp Bandpass filter Oscilloscope Free Running Frequency Adjustment Frequency counter VR740 TP6 Output TP6 Adjust to obtain a reading of 15 625 0 1 kHz Adjust Result Input Input Input Output Output Connection Point Signal Connection Point EV 2500 set Frequency counter ...

Page 13: ...Replace Defective IC200 Replace Defective IC300 Replace Defective IC270 Replace Defective IC700 Replace Defective F201 Replace Defective IC200 Replace Defective IC600 Replace Defective phone jack JK600 Replace Defective tuner TU200 Replace Defective IC270 Replace Defective power switch SW100 Replace No reception of VHF or UHF No picture and no sound RADIO When the radio is defect replace the radio...

Page 14: ...0 R392 R301 R330 R300 R326 R328 R515 R535 Q510 Q513 R321 R322 VR303 R318 R327 C327 C324 R316 R312 C319 R320 R319 R317 R315 R310 C306 C314 Q516 R246 L203 C246 C250 R226 R240 R274 T200 T201 TU200 R223 R239 R227 R224 R238 R225 R222 C259 R236 VR200 C247 R214 C511 Q515 L750 L740 C772 618C L A F203 C510 H300 FU100 T300 C310 R302 R309 R305 L300 L302 VR300 C326 C535 C536 R500 C532 L500 C531 D500 R501 R537...

Page 15: ...36 R738 C774 R750 R751 IC600 C600 CP900 CP700 R757 C788 CP756 CP701 CP792 R701 R703 C786 C787 VR600 VR304 CN900 T950 L950 C925 C603 C606 CP110 CP113 CP111 CP115 L102 D510 D511 C116 C118 C120 L101 C114 C110 D152 R113 T100 C100 CP101 D150 CP106 R161 CP112 CP114 C112 CP105 D180 C329 CP300 C305 C308 JK600 JK100 C390 C342 CP734 C300 C301 C302 C303 C307 R303 R306 C309 R307 JK300 CN510 C339 CP100 C185 SW...

Page 16: ... 7 7 6 10 11 12 47 8 9 6 23 22 50 7 10 24 25 6 25 5 19 48 25 48 25 2 25 1 25 3 25 4 33 2 33 33 1 34 35 48 28 18 21 51 49 27 33 3 26 2 26 1 26 51 26 3 26 4 26 7 26 6 26 5 28 1 28 2 28 3 28 4 31 34 32 28 3 28 2 28 3 30 51 52 39 38 37 36 54 53 43 48 42 41 40 44 45 46 55 ...

Page 17: ...itor GR40Y5V103Z50PT 1 20 C C234 2892 0040 Chip capacitor GR40Y5V104Z25PT 1 20 C C236 2892 0059 Chip capacitor GR40Y5V103Z50PT 1 20 C C237 2892 0059 Chip capacitor GR40Y5V103Z50PT 1 20 C C239 2897 0245 Chip capacitor GR40CH180J50PT 1 20 C C240 2892 0059 Chip capacitor GR40Y5V103Z50PT 1 20 C C243 2892 0059 Chip capacitor GR40Y5V103Z50PT 1 20 C C245 2892 0083 Chip capacitor GR40W5R103K50PT 1 20 C C2...

Page 18: ...GR40Y5V103Z50PT 1 20 C C531 2892 0059 Chip capacitor GR40Y5V103Z50PT 1 20 C C532 2892 0059 Chip capacitor GR40Y5V103Z50PT 1 20 C C535 2892 0040 Chip capacitor GR40Y5V104Z25PT 1 20 C C536 2892 0040 Chip capacitor GR40Y5V104Z25PT 1 20 C C600 2828 5542 Electrolytic capacitor V 16RC2 22MS 1 20 C C603 2805 2499 Electrolytic capacitor V 6 3RC2 100MS 1 20 C C606 2805 2499 Electrolytic capacitor V 6 3RC2 ...

Page 19: ... Oscillator H300 2590 0252 Crystal oscillator NR 18C 1 1 C ICs IC200 2114 1827 Linear IC M51348FP T1 1 1 B IC270 2116 0119 OP AMP BA10358F T1 1 10 C IC300 2114 3479 Linear IC IR3P96 1 1 1 B IC600 2114 3689 IC NJM2070D 1 5 B IC700 2011 8337 LSI MSM6770GS VK 675 F 1 1 B IC701 2114 3458 IC S 81230SG QB T1 1 10 C Jacks JK100 3501 6755 Jack HEC3600 010120 1 10 C JK200 3501 9324 Jack HSJ1501 010020 1 5 ...

Page 20: ... transistor 2SB1218A R TX 1 20 C Q760 2251 0189 Chip transistor 2SB1218A R TX 1 20 C Q950 2253 0308 Chip transistor 2SD1119 R TX 1 10 C Q951 2253 0308 Chip transistor 2SD1119 R TX 1 10 C Resistors R100 2792 0110 Chip jumper ERJ 6GEY0R00V 1 20 C R105 2791 0742 Chip resistor ERJ 6GEYJ332V 1 20 C R107 2791 0607 Chip resistor ERJ 6GEYJ333V 1 20 C R108 2791 1919 Chip resistor ERJ 6GEYJ274V 1 20 C R110 ...

Page 21: ...esistor ERJ 6GEYF272V 1 20 C R309 2797 0035 Chip resistor ERJ 6GEYJ105V 1 20 C R310 2791 1131 Chip resistor ERJ 6GEYJ271V 1 20 C R311 2791 0831 Chip resistor ERJ 6GEYJ681V 1 20 C R312 2791 0607 Chip resistor ERJ 6GEYJ333V 1 20 C R315 2797 1267 Chip resistor ERJ 6GEYF393V 1 20 C R316 2797 2114 Chip resistor ERJ 6GEYF333V 1 20 C R317 2791 2079 Chip resistor ERJ 6GEYJ562V 1 20 C R318 2791 0599 Chip r...

Page 22: ...Chip resistor ERJ 6GEYJ102V 1 20 C R733 2791 0815 Chip resistor ERJ 6GEYJ102V 1 20 C R734 2791 0305 Chip resistor ERJ 6GEYJ472V 1 20 C R736 2791 0305 Chip resistor ERJ 6GEYJ472V 1 20 C R737 2791 0305 Chip resistor ERJ 6GEYJ472V 1 20 C R738 2791 0305 Chip resistor ERJ 6GEYJ472V 1 20 C R739 2797 1015 Chip resistor ERJ 6GEYK225V 1 20 C R740 2797 3962 Chip resistor ERJ 6GEYF394V 1 20 C R741 2797 1841 ...

Page 23: ...5 1085 Chip thermister 157 102 53031 TP 1 20 C Tuner TU200 1013 5315 Tuner TEPE5 01 1 1 C Variable resistors VR100 2775 1799 Chip semi fixed resistor POZ3AN 1 202N T00 1 20 C VR200 2775 1813 Chip semi fixed resistor POZ3AN 1 203N T00 1 20 C VR300 2775 1813 Chip semi fixed resistor POZ3AN 1 203N T00 1 20 C VR303 2775 1820 Chip semi fixed resistor POZ3AN 1 503N T00 1 20 C VR304 2765 1729 Volume RK09...

Page 24: ...IAA K618 K440182 7 0 0 1 20 X N 19 3831 0784 Speaker 50 8B 02 1 1 1 1 C Display N 21 6609 8890 Cable A K618 K440241 1 1 1 1 10 X N 22 6609 8900 Reflector K618 K340092 1 1 1 1 10 X N 23 6609 8910 Reflection tape A K618 K440195 1 1 1 1 20 X N 24 3851 1596 Fluorescent lamp HMES48B25W64C X 1 1 1 1 C N 25 6610 0948 Display ass y K340182 1 1 1 1 1 B 25 1 6608 7271 Adhesive tape B K502 K410903A 2 1 1 1 2...

Page 25: ... case A K618 K140042 2 1 1 1 1 C 39 6606 4700 Blind B K603 K410877 1 1 1 1 20 X N 40 6609 8780 Battery spring D K618 K440143 1 1 1 1 5 X N 41 6609 8770 Battery spring C K618 K440142 1 1 1 1 5 X N 42 3851 1589 Rod antenna YC KX 618 A1 1 1 1 1 B N 43 6609 8730 Antenna plate K618 K440167 1 1 1 1 20 X N 44 6610 0140 Cushion C K618 K411959 2 3 3 3 20 X N 45 6610 0962 Battery case ass y K340184C 1 1 1 1...

Page 26: ... 6 OUT GND 4 5 GND IC600 NJM2070M IC701 S 81230SG GND 1 5 NC VIN 2 OUT 3 4 NC IC300 IR3P90Y 1 8 2 7 3 6 4 5 NC 37 24 KILLER F RGB AMP 38 23 PICTURE FRP 39 22 TIME CONST RGB INV 40 21 SYNC IN B SUB BRI 41 20 SYNC OUT R SUB BRI 42 19 SYNC SEP BRIGHT 43 18 H F OUT GANMA2 44 17 APL GANMA1 45 16 CLAMP PEEK LIMITTER 46 15 TRAP B SUB CONT 47 14 AGC F R SUB CONT 48 13 AGC SW 1 36 B OUT CONT 2 35 DCDET EXT...

Page 27: ...RT SRT OE HCNT CLR VLB TU PWM UHF VBAR UBAR SW VMUTEB FRP HDB CSYNC AFTO VDD3 TUO VSS3 AMUTEB AFTI KDB KCB VDB M5 M6 VDD1 MBUF VSS2 SYF AVB M1 M2 VL1 VH1 V1 VREF OSC ADJ VDD1 PD VCO VSS1 VDD2 TSI1 TSI2 MCLK C B E C B E C 2SB1218A 2SC4238 2SD1819A DTC144EUW DTA143TUW 2SD1119 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45...

Page 28: ...esistance values are indicated in ohms k 103 ohms M 106 ohms 2 All capacitance values are indicated in µF p 10 6 µF 3 All inductance values are indicated in µH 5 3 TP7 TP2 1 IF Pad TP3 TP4 4 2 9 8 TP1 12 13 14 15 16 10 11 7 TP5 17 TP8 TP6 6 ...

Page 29: ... 28 RADIO Notes 1 All resistance values are indicated in ohms k 103 ohms M 106 ohms 2 All capacitance values are indicated in µF p 10 6 µF 3 All inductance values are indicated in µH ...

Page 30: ... V 4 IC200 pin 18 64 µs 4 0 V 5 IC300 pins 32 34 36 64 µs 4 4 V 6 IC300 pin 21 125 µs 4 4 V 7 IC300 pin 39 10 µs 2 0 V 8 Q111 base 10 µs 10 V 9 Q111 collector 64 µs 2 8 V 0 IC700 pin 1 125 µs 2 8 V A IC700 pin 2 64 µs 2 8 V B IC700 pin 3 64 µs 2 8 V C IC700 pin 4 64 µs 4 5 V E IC700 pin 6 3 µs 4 5 V D IC700 pin 5 ...

Page 31: ... 30 125 µs 5 V G IC300 pin 30 4 5 V 64 µs F IC700 pin 7 ...

Page 32: ...8 11 10 Nishi Shinjuku Shinjuku ku Tokyo 160 Japan Telephone 03 3347 4926 ...

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