LG FL-R88~2 free download

File name FL-R88~2.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. TEST & ADJUSTMENT POINT PNS02 Figure 1. Main l?C.Boatd - 2. FOCUS & TRACKING GAIN ADJUSTMENT JIG (TO SCOPE) I 800H12Vrms -r fa 1 RF0 TEO osc 4 TEI 3 Vref Vref 2 4 FEI FE0 CH2 (1 VIDIV) Vref CHI (SOmWDIV) " _ .`PK .6..8.~ NOTE) This jig is not serviceable pat?. 7 3. Before adjusting, preset adjustment potentiometers VR501, VR502, VR503 and VR504 center. L 4. TRACKING BALANCE ADJUSTMENT .s` 1) Connect the oscilloscope to TP504 (pin @ : TEO) and TP504 (pin @ : Vref). 2) Insert the test disc (YEDS-18) and playback the 12th selection. 3) Turn VR502 fully counter-clockwise. 4) Adjust VR504 so that the amplitude above and below the zero DC line becomes equal (amplitude A=B). A=B 5) Set VR502 to center position. 5. FOCUS OFFSET ADJUSTMENT (you have to use 1O:l