Block Diagram 21 109B2 GS3 CM25 Go to cover page Forward Back H V V H H V H. freq. : 30 - 97KHz V. freq. : 50 - 160Hz S-Capacitor Switch Switching power freq.: 77kHz CPU clock freq. : 12MHz H/O H V H/O V/O +190 90~264V +80 +13 47~63Hz +12 +5 -13 R B Pre -Amp TDA4886A Post-Amp LM2405 OSD MTV 018N-27 Rotation CRT CPU WT62P1/DDC1/2B Linearity Control DAF S- Capacitor Horizontal Deflection Vertical TDA8177F Muting CKT Sync Processor TDA 4841 XXX EHT/L4990A X-RAY Degaussing- Ckt Power Supply TEA1504 Video /B DAC SCL SD -6.3 DAC HUNLOCK Main /B SDA/SCL EEPROM ST24C16 Function Key/Cont rol Board & LED Flying cable 15 pin D-sub G Vedio-E TDA4822 Control Panel Schematic Diagram & C.B.A 22 109B2 GS3 CM25 1891 A2 1892 A2 1893 A2 1894 A3 1895 A4 3891 A2 3892 A3 3893 A2 3894 A3 3895 A3 6891 A1 8891 A4 Go to cover page Forward Back Video Panel (A) Schematic Diagram & Waveforms for Diagram (A) 23 109B2 GS3 CM25 Forward Back A1 7301-6 A3 7701-1 A1 7301-8 A3 7701-5 A1 7301-10 A4 1711-8 A2 7301-22 A2 7301-19 A4 1711-6 A2 7301-16 A3 7701-3 A4 1711-12 2 V/div AC 5 mS/div 50 V/div AC 5 mS/div 2 V/div AC 5 mS/div 50 V/div AC 5 mS/div 2 V/div AC 5 mS/div 50 V/div AC 5 mS/div 2 V/div AC 5 mS/div 2 V/div AC 5 mS/div 50 V/div AC 5 mS/div 2 V/div AC 5 mS/div 50 V/div AC 5 mS/div 50 V/div AC 5 mS/div A5 7302-2 A5 7302-4 1 V/div AC 5 mS/div 1 V/div AC 5 mS/div A5 7302-6 A7 7302-23 A7 7302-17 A7 7302-19 A7 7302-21 A6 7302-8 1 V/div AC 5 mS/div 2 V/div AC 5 uS/div 1 V/div AC 5 mS/div 1 V/div AC 5 mS/div 1 V/div AC 5 mS/div 2 V/div AC 5 mS/div A1 A5 A6 A7 A7 A7 A8 A5 A5 A1 A1 A2 A2 A2 A3 A4 A4 A4 A3 A3 4.2V 1.2V 4.7V 4.1V 1.2V 1.2V 4.2V 4.2V 1.9V 1.9V 1.8V 56.5V 41.2V 4.8V 5.2V 5V 4.9V 48V 43.9V -42V 4.7V 56.5V 57.8V 5V 4.2V 4.5V 3.2V 2.4V 5V 5V 4.5V 5V 5V 3.3V Go to cover page A Deflection (B1) Schematic Diagram & Waveforms for Diagram (B1) 109B2 GS3 CM25 26 Go to cover page Forward Back B1 B4 B5 B6 B7 B8 B9 B10 B11 B14 B15 B16 B17 B18 B23 B24 B25 B26 B27 B28 B29 B30 B31 B19 B20 B22 B21 B12 B32 B33 B34 B35 B36 B37 B38 B39 B40 B41 B42 B43 B44 B13 B2 B3 4.8V 5.1V 38.6V 4.3V 5V 3.8V 2.5V 4.5V 5.2V 1.1V 2.3V 5.2V 1V 0.6V 2.4V 2.4V 1.2V 9.7V 6.1V 1.1V 2.6V 1.1V 4.9V 3V 3.5V 2.2V 2.7V 2.8V 9.5V 2.7V 66.3V 10.9V 10.9V 10.9V 10.9V 10.9V 120.3V 79.3V 2.4V 2.7V 6.9V 2.6V 4.9V 3.6V 1.4V 2.9V 12.8V 41.4V 12.6V 17.7V 8.4V 6.7V 0.9V 114.8V -0.7V 42.5V 45.9V 43.4V 42.6V 1.1V 2V 2V 2.6V 25.6V 3.2V 3.2V 2.6V B22 7606-E B29 7629-C B36 7433-2 B1 7503-14 B8 7503-32 B15 7507-C B23 7601-G B30 7629-B B37 7433-1 B2 7503-16 B9 7503-6 B16 7626-E B24 7601-D B31 7624-C B38 7434-B B3 7503-17 B10 7503-4 B17 7626-B B25 7602-B B26 7615-D B33 7404-1 B40 5573-6 B27 7622-D B34 7404-5 B41 5573-4 B6 7503-12 B13 7503-29 B20 5603-5 B32 7404-6 B39 7571-G B4 7503-24 B11 7503-11 B18 7603-E 20 V/div AC 5 uS/div 0.2 V/div AC 5 uS/div 1 V/div AC 5 uS/div 2 V/div AC 5 mS/div 2 V/div AC 2 mS/div 5 V/div AC 5 uS/div 20 V/div AC 5 uS/div 0.5 V/div AC 10 uS/div 2 V/div AC 5 uS/div 1 V/div AC 5 mS/div 5 V/div AC 5 uS/div 1 V/div AC 5 uS/div 50 V/div AC 10 uS/div 50 V/div AC 5 uS/div 0.2 V/div AC 5 uS/div 0.5 V/div AC 5 mS/div 1 V/div AC 5 uS/div 1 V/div AC 5 uS/div 1 V/div AC 10 uS/div 0.2 V/div AC 10 uS/div 1 V/div AC 5 uS/div 0.2 V/div AC 10 uS/div 0.5 V/div AC 5 mS/div 5 V/div AC 5 uS/div 10 V/div AC 5 mS/div 20 V/div AC 10 uS/div 100 V/div AC 10 uS/div 20 V/div AC 10 uS/div 2 V/div AC 5 mS/div 0.5 V/div AC 5 mS/div 0.5 V/div AC 5 mS/div 20 V/div AC 5 uS/div 0.5 V/div AC 5 mS/div 20 V/div AC 5 uS/div 100 V/div AC 5 uS/div 100 V/div AC 5 uS/div 10 V/div AC 5 mS/div 5 V/div AC 5 uS/div 2 V/div AC 5 mS/div 1 V/div AC 5 uS/div 5 V/div AC 5 uS/div B5 7503-11 B12 7503-1 B19 7605-D 20 V/div AC 5 uS/div B1 CPU (B2) Schematic Diagram & Waveforms for Diagram (B2) 109B2 GS3 CM25 27 Go to cover page Forward Back B50 7801-40 B51 7801-41 B45 7801-1 B47 7801-34 B49 7801-38 B48 7801-37 B46 7801-33 2 V/div AC 5 uS/div 2 V/div AC 5 mS/div 0.1 V/div AC 5 uS/div 2 V/div AC 5 uS/div 2 V/div AC 5 uS/div 2 V/div AC 5 uS/div 2 V/div AC 5 mS/div B45 B46 B47 B50 B48 B49 B51 B2 109B2 GS3 CM25 Power Supply(C) Schematic Diagram & Waveforms for Diagrams (B1) & (C) 28 Go to cover page Forward Back C1 5101-2 C2 5101-8 100 V/div AC 5 uS/div 10 V/div AC 5 uS/div C1 C2 136.4V 4.4V 12.8V 0.8V 2.9V 2.4V 13.3V 12.1V 12.1V 79.5V 11.4V 9.8V 2.4V 11V -3.6V 12.9V 2.9V B43 5573-10 B50 7801-40 B44 5573-8 B51 7801-41 B45 7801-1 B47 7801-34 B49 7801-38 B48 7801-37 B46 7801-33 50 V/div AC 5 uS/div 2 V/div AC 5 uS/div 5 V/div AC 5 mS/div 2 V/div AC 5 mS/div 0.1 V/div AC 5 uS/div 2 V/div AC 5 uS/div 2 V/div AC 5 uS/div 2 V/div AC 5 uS/div 2 V/div AC 5 mS/div C 30 109B2 GS3 CM25 Go to cover page Forward Back Exploded View 41 1155 25 1157 5007 1151 1 1158 3 2 3138 107 99110 BACK COVER ASSY 3138 178 51570 VIDEO PCB ASSY 8238 274 39980 DEGAUSSING COIL 8238 274 38600 CRT M46LSQ183X01 (W) 3138 127 50030 FRONT CABINET ASSY 3138 178 51590 KEY CNRT PCB ASSY 3138 107 98400 PEDESTAL ASSY 3138 178 51560 MAIN PCB ASSY 3138 104 49930 SCREW COVER 112 111 113