SERVICE MANUAL WORLD HEADQUARTERS CANADA U.S.A. Yorkville Sound Yorkville Sound Inc. 550 Granite Court Pickering, Ontario L1W-3Y8 CANADA 4625 Witmer Industrial Estate Niagara Falls, New York 14305 USA Voice: (905) 837-8481 Fax: (905) 837-8746 Voice: (716) 297-2920 Fax: (716) 297-3689 s-bm400-1v1.
BM400 Parts List 9/28/98 IMPORTANT SAFETY INSTRUCTIONS INSTRUCTIONS PERTAINING TO A RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS. INSTRUCTIONS RELATIVES AU RISQUE DE FEU, CHOC ÉLECTRIQUE, OU BLESSURES AUX PERSONNES. CAUTION: AVIS: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE. AFIN DE RÉDUIRE LES RISQUE DE CHOC ÉLECTRIQUE, N'ENLEVEZ PAS LE COUVERT (OU LE PANNEAU ARRIÈRE). NE CONTIENT AUCUNE PIÈCE RÉPARABLE PAR L'UTILISATEUR.
WARNING: 180VDC IS BETWEEN POWER SUPPLIES. THIS PRESENTS A SIGNIFICANT SHOCK HAZARD. PLEASE, USE EXTREME CAUTION WHEN SERVICING! MTA2955 J108 +90V MJ15022 (U2) MJ15023 MTA3055E +FOPV +FLOATV LIMITER DRIVE 56K R8 560K 2K87 R34 LIMIT J108 2K49 7 TO M1019 PREAMP BOARD 6 -15V R26 AMPIN LIMSIG 17K8 3 2 1 7 5 A BIAS 68R 1/2 CONN2 R27 R30 17K8 C15 100p 2K740 680R R40 27R R57 D16 BAV21 10u C33 6V BAV21 D17 R91 180R R55 6K8 AGND 2K2 R38 R61 0R18 270R C38 15n MBR160 D18 22V/.
TRANS PRIM . VCD "800. ETCH "210. GUIDE "020. "500. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 NOV/30/93 APR/02/96 . . JUN/28/96 OCT/15/96 APR/09/97 JUN/02/98 . AUG/30/00 . D D D D D D D D D 3.40 3.50 . . 3.60 4.00 4.00 5.00 . 5.10 . V V V V V V V V V +90V BAR DOWN C25_TO_100N PC#5050_ADD_470R_(R83}_4N7 (C34) BASE_TO_COLLECTOR_Q6 PC#5155_R38_3K9-->2K2 PC#5221_R83_470K->270R PC#5355_ADD_3R9_R92_220N_C36 PC#5727_C25_SPACING_.
+7.
. 1 2 3 4 5 6 7 8 9 10 11 JUN/06/97 . DEC/04/97 DEC/12/97 JUN/10/98 DEC/10/98 D D D D D 4.00 . 5.00 6.00 7.00 8.00 V V V V V 400B TWEETER PCB . VCD 3U3 100V D110 1N4004 TC1 MODEL(S):- 400B # DATE VER# DESCRIPTION OF CHANGE PC#4740_MODIFIED_SWITCHES AMP-INS_TO_EYELETS BREAKAWAY_PCB_FOR_TWEETER_ADDED ROTARY_POTS_CHANGED POTS_CHANGED_TO_DETENT_STYLE POT_SUPPORT_SCREW_ADDED N N N N N TLO72 "006.6 X "001.51=EZIS KNALB BLANK SIZE=15.100" X 6.600" M1019.