Expert m 7411 home stereo music system

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ALIGNMENT PROCEDURE (TUNER) 1. Signal input must be kept as low as possible to avoid AGC and limiting action. 2. Standard modulation is 400H2 at 30% amplitude. 3. Set volume control at maximum unless otherwise indicated, when using V.T.V.M. for output indicator. 4. Set function selector to "RADlO" position. Step Signal Generator or Sweep Generator Radio D ial Setting OutputI nd icator Connection Adjust Adiust for Connection F requency AM.I .ALIGNMENT 1 Push MW button 2. To standard loop-ANT placed at a distance of 60cm f rom the built-in bar-ANT. 470 KHz Point of non -inter- f erence Scope or V.M. To TP101 (GND to R122], or SPoutput T103T104 (1st (2nd IFT)IFT) Maximu m output MW.R : ALIGNMENT 3. SAME AS STEP (21 540 KHz 540 KHz SAME AS STEP (21 L5(MW OSC coil) Maximum output 4. SAME AS STEP (21 1600 KHz 1600 KHz SAME AS STEP (21 TC6(MW OSC trimmer) Maximu m output 5. Repeat steps (3) and (41 . 6. SAME AS STEP (21 600 KHz 600 KHz sAME AS STEP l2l 1901(MW ANT coil) Maximu m output 7. SAME AS STEP (21 1400 KHz 1400 KHz SAME AS STEP (21 TC4(MW ANT trimmer) Maximu m output 8. Repeat steps (6) and 0l,. LW.R F ALIGNMENT 9. Push LW button. 10 SAMEAS STEP (2) 150 KHz 150 KHz SAME AS STEP (21 L6(LW OSC coil) Maximu m output 11 SAME AS STEP (21 300 KHz 300 KHz sAME AS STEP (21 TC7(LW OSC trimmer) Maximum output 12. Flepeat steps (10) and (1 1 ) 13. SAME AS STEP (21 160 KHz 160 KHz SAME AS STEP (21 L902(LW ANT coil) Maximu m output 14. SAME AS STEP (21 280 K Hz 28O KHz SAME AS STEP (21 TC5(LW ANT trimmer) Maximu m output 15. Repeat steps (13) and (141. . FM.IF ALIGNMENT 16. Push FM button. 17. SWEEP GENE RATOR Hot side ..... to TP103 GND .... to TPl04 10.7 MHz Poi nt of non-inter-ference l12I (FM Det. Coil) Y,.l!:l.rrlifier ffi oTSCOpe. lrr To TP1o2 I ii,r,r Det. coit) (GxtD to R1221 ItzII (fM Det. Coil) Turn fully counter clockwise Flat and maximum as shown in Fig. A. "S" curve as shown in Fig. B. -2-

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ALIGNMENT PROCEDURE (TUNER) Step Signal Generator or Sweep Generator RadioD ial Setting Output indicator Connection Adjust Adjust for Connection F requency FM.RF MANUAL ALIGNMENT 18. Push MAN UA L button. 19. To FM ANT terminal 87.4 MHz Low end SAME AS STEP (17) SVR 802 Maximum output 20. SAME AS STEP (19) 108.3 MHz H igh end SAME AS STEP (17) SVRBO1 Maximum output FM-RF PRESET ALIGNMENT 21 . Push PR ESET buttons, ch1 - ch8. 22. SAM E AS STEP (1 9)) 87.4 MHz SAME AS STEP (17) SV RBO3 Maximum output FM PRESET FREOUENCY METER ALIGNMENT 23. Push one of PRESET buttons, ch1 - ch8. 24. SAME AS STEP (19) 98.0 M Hz 40-60d B 98.0 MHz PVRBOl -806 SAME AS STEP I7I SV R 804 98 MHz (See Fig. C) FM SIGNAL METER ALIGNMENT 25. Push MANUAL button 26. SAME AS STEP (19) 90,98,100 or 106 MHz 60 dB 90, 99, 100 or 106 MHz SAME AS STEP (17\ SVRlOO With in the range of Fig. D FM MPX PILOT ALIGNMENT 27 No. signal Poi nt of non-inter-f eren ce F requency co unter To TP151 (GND to R122) Short-circuit between R122 and TP102. SVR 152 19 KHz t 30 Hz FM STEREO SEPARATION ALIGNMENT 28. SAME AS STEP (19) 98 MHz ln put 1 mV stereo mod. 1 KHz 30% L (and R) 98 MHz Scope or V.M. To right ch. output (To Left ch. output) SVR151 Minimum output /^\ 10.7 M Hz\ \ \V, Fig. A Fig. B -3- Fig. C Fig. D