LG CD321A~1 free download

File name CD321A~1.PDF

ADJUSTMENTS This set has been aligned at the factory and normally will not require further adjustment. As a result, it is not recommended that any attempt is made to modificate any circuit. If any parts are replaced or if anyone tampers with the adjustment, realignment may be necessary. 1.IMPORTANT 1. Check Power-source voltage. 2. Set the function switch to band being aligned. 3. Turn volume control to minimum unless otherwise noted. 4. Connect low side of signal source and output indicator to chassis ground unless otherwise specified. 5. Keep the signal input as low as possible to avoid AGC and AC action. 2.TUNER ADJUSTMENT 1. Test & Adjustment Points Figure 1. Main P.C. Board -6- 2. AM (MW) IF Adjustment IF Genescope IF Adjust for Adjustment 455kHz Maximum L7(See figure 3) IC101(Pin 13 , 14 ) L4 IN OUT Unit 455kHz 455kHz Figure 2.AM(MW) IF Adjustment Connection Diagam Figure 3.AM(MW) IF Curve 3. AM(MW) RF(Coverage & Tracking) Adjustment NO ITem SG Output Adjust for Adjustment 1 515kHz Maximum L5 2 Coverage 1,650kHz or 1,710kHz(U.S.A) Maximum VC1-3 3 Repeat steps 1 and 2 several times. 4 600kHz Maximum L1 5 Tracking 1,400kHz Maximum VC1-4 6 Repeat step 4 and 5 several times. OscIlloscope SSVM AM Signal generator Test Loop#