IMPORTANT SAFETY INSTRUCTIONS This lightning flash with arrowhead symbol, within The exclamation point within an equilatereal triangle is an equilateral triangle, is intended to alert the user to intended to alert the user to the presence of important the presence of uninsulated “dangerous voltage” operating and maintenance (servicing) instructions in within the product’s enclosure that may be of sufficient the literature accompanying the appliance.
Page 3
3426 8' 3/16 SJT AC LINE CORD REMOVB-CSA 4895 1/4W 51K T&R RES 6435 _22N 275V 20%CAP BLK 'X2' 15MM AC 8268 TRAYNOR LOGO PLASTIC NICKEL PLATING 4763 1/4W 82K50 0.1% *** T&R RES 6451 __4N7 250V 20%CAP BLK 'Y' 10MM AC...
Page 4
3426 8' 3/16 SJT AC LINE CORD REMOVB-CSA 4895 1/4W 51K T&R RES 6435 _22N 275V 20%CAP BLK 'X2' 15MM AC 8268 TRAYNOR LOGO PLASTIC NICKEL PLATING 4763 1/4W 82K50 0.1% *** T&R RES 6451 __4N7 250V 20%CAP BLK 'Y' 10MM AC...
Page 5
5428 __3N3 50V 10%CAP T&R BEAD 3549 TRIFURCON TERM .156 4895 1/4W 51K T&R RES 5204 _10N 100V 10%CAP T&R RAD .2"FLM 8402 TRAYNOR KNOB, CHROME W/STOPPER 4763 1/4W 82K50 0.1% *** T&R RES 5205 _15N 100V 10%CAP T&R RAD .2"FLM 8633 KNOB ROUND PUSHBUTTON 1/4"...
Page 6
Block Diagram for DynaBass 400/T/H D E S I G N E D A N D M A N U F A C T U R E D B Y Y O R K V I L L E S O U N D Input Preamp Tube...
Page 12
Into Wave tube support board BlankSize - 18000x9700 FOR CABLE TIE FOR CABLE TIE W12_ R156 R173 200K SOCKET R102 4003 R157 Gold Gold Gold 100N 4000 R161 R162 100R SOCKET UPSIDE DOWN 470N R170 100N 3923 R176 100R Gold Gold Gold 2N5638...
Page 13
SEE LAYOUT DIAGRAM M1329 PRODUCTION NOTES 1. CUT METAL PIN ON XLR 2. LEDS ARE HAND INSERTED WITH #3747 0.5" SPACER YS# 3923 THIS CONNECTION MUST BE BROKEN HERE...
Page 14
SEE LAYOUT DIAGRAM M1329 HISTORY M1329 DRILL HISTORY POTLIST MODEL(S):- MODEL(S):- DB400 DB400/DB400H/DB400T DB400/DB400H/DB400T MODEL(S):- DATE VER# DESCRIPTION OF CHANGE DATE VER# DESCRIPTION OF CHANGE FUNCTION PART# KNOB JULY-2003 JAN-15-2009 1.00 RELEASED FOR PRODUCTION DRIVE MIX 4467 8402 P12 / P19 GAIN , MID-FREQ 4469 8402...
Page 15
WARNING: 180VDC IS BETWEEN POWER SUPPLIES. THIS PRESENTS A SIGNIFICANT SHOCK HAZARD. PLEASE, USE EXTREME CAUTION WHEN SERVICING! Not used in DB400H LIMITER DRIVE AMP[N5] IRL2910 4148 0A45 U8:B 220R 6966 1/4W 1/4W TO220 3682 TW DFT U8:A 1/2W 330K #7336 270R 1N4745A...
Page 18
SEE LAYOUT DIAGRAM M1328/M1342 PRODUCTION NOTES Note: This pcb blank is X8005. After stuffing, R5, C9, W32, W33, ONLY FOR M1328 DB400 AND DB400T. DO NOT STUFF FOR M1342 DB400H it becomes either M1328 for the DB400 or M1342 for the DB400H. TO-3s: INSTALL NUTS ON BOTTOM SIDE OF PCB ADD THERMAL JOINT COMPOUND {GOOP} BETWEEN Q1 AND Q2 ;...
Page 19
SEE LAYOUT DIAGRAM X8005 HISTORY X8005 DRILL HISTORY BC550C,BC560C MJF15030 IRL2910 MJ21195 J109 MODEL(S):- MODEL(S):- 7915 7815 DB400/DB400T/H MJF15031 IRF4905 MJ21196 DATE VER# DESCRIPTION OF CHANGE DATE VER# DESCRIPTION OF CHANGE JAN-15-2009 1.00 RELEASED FOR PRODUCTION D S G TO-92 TO-92 X8005 PENDING CHANGES MODEL(S):-...
Page 21
SEE LAYOUT DIAGRAM M1328/M1342 PRODUCTION NOTES Note: This pcb blank is X8005. After stuffing, R5, C9, W32, W33, ONLY FOR M1328 DB400 it becomes either M1328 for the DB400 AND DB400T. DO NOT STUFF FOR M1342 DB400H or M1342 for the DB400H. TO-3s: INSTALL NUTS ON BOTTOM SIDE OF PCB ADD THERMAL JOINT COMPOUND {GOOP} BETWEEN Q1 AND Q2 ;...
Page 22
SEE LAYOUT DIAGRAM X8005 HISTORY X8005 DRILL HISTORY BC550C,BC560C MJF15030 IRL2910 MJ21195 J109 MODEL(S):- MODEL(S):- DB400/DB400T/H 7915 7815 MJF15031 IRF4905 MJ21196 DATE VER# DESCRIPTION OF CHANGE DATE VER# DESCRIPTION OF CHANGE JAN-15-2009 1.00 RELEASED FOR PRODUCTION D S G TO-92 TO-92 X8005 PENDING CHANGES MODEL(S):-...
Page 23
WIRING DIAGRAM-v100-DB400T Part SC-2COMBO right angle plug 10" Woofer 16.5" 10" Woofer M1328 3/3 xover pcb Tweeter...
Page 24
SERVICE BULLETIN Preamp Tube Replacement Products Affected: xs400, xs400t, xs400h, xs800h, the DynaBass Series (the 400, 400t, db400h and db800h). In order to maintain consistent audio sound quality and performance replace preamplifier tubes in the xs400, xs400t, xs400h, xs800h, the DynaBass Series (400, 400t, 400h and db800h) with Yorkville specified and sorted 12AX7 tubes (Yorkville Sound part number “12AX7SORTED”).
SERVICE BULLETIN Remplacement de Lampe Pour Préamplificateur Produits Affectés: xs400, xs400t, xs400h, xs800h, Le Series DynaBass (the 400, 400t, db400h and db800h). Pour préserver une qualité et une performance audio constante remplacez les lampes de préamplificateur des appareils suivants avec des lampes désignées 12AX7 Yorkville assortis (Numéro de pièces Yorkville Sound “12AX7SORTED”): xs400, xs400t, xs400h, xs800h, Le Series DynaBass (400, 400t, 400h et 800h).
Need help?
Do you have a question about the DYNABASS 400 - MANUAL SERVICE and is the answer not in the manual?
Questions and answers