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42 Series Schematic 10074 SW Arctic Drive Beaverton, OR 97005 503-641-7287 Service Bulletin В Blamp Systems, Inc. ESP, О.’ Вох 728 вища ju - Beaverton, OR 97075 - E 203/641-6767. > AS: March 23, 1983 ETA ATTE 42 SERIES METER CALIBRATION 1. SINEWAVE GENERATOR 2. AC VOLTMETER. (Log Scale) 1. INSERT A -20db LEVEL SIGNAL INTO CH. 16 (24) LINE INPUT. 2. SET THE LINE/MIKE SWITCH OUT. ALL EQ'S AND PAN CENTERED. ALL AUX, ECHO, AND MONITOR CONTROLS FULLY CW. DEPRESS SUB 1,2,3,4 ASSIGN SWITCHES. SET THE SLIDE FADER TO ITS MAXIMUM OUTPUT POSITION. 3. INSERT THE AC VOLTMETER TO CH. 16 (24) DIRECT OUT. ADJUST THE TRIM CONTROL FOR "O"db (0.775 VRMS) OUT. 4. MOVE THE AC VOLTMETER TO SUB 1 OUT. ADJUST THE SUB 1 FADER FOR AN OUTPUT OF "0"db. REPEAT FOR SUBS 2,3,4, LEFT MAIN, RIGHT MAIN AND MONITOR. 5. LOCATE THE SUB 1 METER CALIBRATION CONTROL .ON THE UNDERSIDE OF THE SUB 1 CIRCUIT BOARD. ADJUST THIS CONTROL FOR A "O"'db READING ON THE PAÑEL METER. REPEAT THIS PROCEDURE FOR SUBS 2,3, AND 4. METER CALIBRATION IS NOW COMPLETE NOTE: OTHER OUTPUT LEVELS MAY BE USED AS A REFERENCE WHEN CALIBRATING THE METERS FOR USE WITH EQUIPMENT RE- QUIRING A DIFFERENT REFERENCE LEVEL. 817 En do 2e a aa Fa de ¡Ems da a 2° EL ee CA a о , = ВЕ mers RA x a LR Hida E SNS A > vi à aE NAS Za RUN NE SLAM ARES wana SO 2 E, - Ts. FEED NITO El STA A TD 4/5 E/07 IV LASS DFT FESS IA LDIVIS SVT Se 5570 ons 5 ос» ond iv ; or? 77 $ YET EE q [=> = 5577, . | поэт 57+ Fred LE 28 5377 " T | &/- FT goo ле 300° O re A E | - 7 MZ 7 # УР” 01 - " © Те Г * ATE | | ow LE i it Tog pss = | > Г" wher | VY 5708 PU $ 737397 N | |; © ; rez gsr | OOF y #2 (ов) 5579/7 7 @1 a e] +0 т т . ot word ле pre J 3 I Y/ >, 1 р / LORFIT pre mos sr + : > 2 (Zw) oy . г ‚вн | “хе т vas 1 © 0777 7 = J | ya Nez or HIT | | wv Hs sl = 1 j „тт 9 CE Sy |} |) L 77 i | oF ? $ OL 1 A | NU = 7 oN ve | 997 0 | 80/27 ——| | | } DJ . 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