14GT15 14GT20

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14GT15 14GT20 TROUBLE SHOOTING TABLE (Continued) CIRCUITS TO BE CHECKED: » Tuner. » PIF. » Automatic Gain Control. » (5V), (32V) Power Source. NO PICTURE, NO SOUND Does the noise level increase at max. Contrast, Brightness and Sound controls ? Noise increases but no signal is received. No snow noise. Check the tuner supply voltage LB must be approx. 5V. BT must be approx, 32V. And CH preset data check. Does noise or signal appear at pin (40) of IC801 ? Check the tuner AGC at TP201. Does noise or signal appear at pin (38) of IC801 ? Check IC801 and its related circuit. Check pin(38) of IC801. Check pin (27) of IC801, Tuner and related circuit. Check Q205 and related circuit. Check pin (1) of SF201 and Tuner related circuit. Check pin (37)of IC801 and related circuit. CIRCUITS TO BE CHECKED: » Sound system pins (28) and (44) of IC801. » Sound Detector Circuit. » Sound Switch and Att. Control. » Audio Output Circuit. NO SOUND Does noise signal appear at pin (44) of IC801 ? Does signal appear at pin(28) of IC801? Does signal appear at pins (6) and (8) of IC301 ? Check C356 and peripheral circuit. CheckIC801. Check P302 or P301 connector of IC301 and peripheral circuit. Check Q301, pins(4) and (6) of IC801 and peripheral circuit. 28
14GT15 14GT20 TROUBLE SHOOTING TABLE (Continued) NEITHER VERTICAL NOR HORIZONTAL SYNCHRONIZATION CIRCUIT TO BE CHECKED: » Sync. Separator Circuit. Check pins(16), (17) and (34) of IC801. DEFECTIVE VERTICAL AMP. AND VERTICAL LINEARITY Readjust vertical size. (Bas Data) Vertical linearity and size is abnormal. Check R504, R503, R506, R513, C517 and D501. NO VERTICAL SCAN Check IC501. Check C503 and C507. Check IC501. 29
Page 1 and 2: SERVICE MANUAL 14GT15 14GT20 S30Y11
Page 3 and 4: 14GT15 14GT20 IMPORTANT SERVICE NOT
Page 5 and 6: 14GT15 14GT20 SERVICE MODE (1) In t
Page 7 and 8: 14GT15 14GT20 USER DATA IN SERVICE
Page 9 and 10: 14GT15 14GT20 EEPROM ITEMS OSD DATA
Page 11 and 12: PIF ADJUSTMENT 14GT15 14GT20 No. Ad
Page 13 and 14: 14GT15 14GT20 CONVERGENCE ADJUSTMEN
Page 15 and 16: HORIZONTAL AND VERTICAL DEFLECTION
Page 17 and 18: FUNCTION OPERATION CHECKING (VIDEO
Page 19 and 20: MEMORY MAP ADDRESS DATA MICON E 2 P
Page 21 and 22: 14GT15 14GT20 ADDRESS DATA MICON E
Page 27: TROUBLE SHOOTING TABLE 14GT15 14GT2
Page 31 and 32: SOLID STATE DEVICE BASE DIAGRAM 14G
Page 33 and 34: 14GT15 14GT20 MODEL 14GT20 CHASSIS
Page 35 and 36: DESCRIPTION OF SCHEMATIC DIAGRAM 14
Page 37 and 38: J 14GT15 14GT20 C351 103B I H G R31
Page 39 and 40: J SCHEMATIC DIAGRAM: MODEL 14GT20 H
Page 41 and 42: 14GT15 14GT20 J SCHEMATIC DIAGRAM:
Page 43 and 44: 14GT15 14GT20 J BLOCK DIAGRAM - 2/3
Page 45 and 46: J PRINTED WIRING BOARD ASSEMBLIES P
Page 47 and 48: 14GT15 14GT20 14GT15 14GT20 PWB-A:
Page 49 and 50: 14GT15 14GT20 Ref. No. Part No. Des

14GT15 14GT20

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