User manual RANE MA6 SCHEMA REV F

[. . . ] CAUTION: WAIT ABOUT 1 5 MINUTES AFTER THE AMPLIFIER HAS BEEN POWERED D O W N BEFORE BEGINNING DISASSEMBLY PROCEDURE, T O ALLOWTHE POWER SUPPLY CAPACITORS T O DISCHARGE. #6 x 3/8" phillips screws o n t h e side rails and 10 ea. # 6 x1/4" phillips screws o n the edges of the b o t t o m cover. 2. [. . . ] N o w pull firmly straight u p t o disengage t h e m o d u l e from t h e connector--use a rocking m o t i o n t o ease removal, as t h e connector i s very tight. . NOTE: Be sure that all of the transistor sil pads (insulators) stay o n t h e heatsink--some of thc\scl may stick o n the transistor and be inadvertently lost or thrown away w i t h t h e defective com ponent. Mo~III(\( \ p I ~OII~C~I~~: r ( rcl(tory 5~1ppIiocl rnodulos are prc-tuned and ready for installation. If yo11 h d v ~ 113d(l(\r(\l)dir\ or1 1 r11o(i111(1, ' hi1 \urC that ALL diodes are measured and replaced as rlt\(-(lssC1ry 1)rior to i ~ i \ t i l l l i ~ t i o r i t l i c l 111odi11c. Be sure that all five sil pads (insulators) are i n place o n t h e heatsink. BE SURE THATTHE NYLON SHOULDER WASHERS ARE I N PLACE O N TRANSISTORS Q2, Q4 a n d Q8 (TO-220 cases). Install t h e #4-40 screws in these and snug u p only: D O N O T OVERTIGHTEN THESE DRIVER SCREWS AS THIS MAY DAMAGE THE T H I N SHOULDER WASHERS A N D CAUSE A SHORT. #4-40 screws o n t h e o u t p u t and TIGHTEN TH ESE FI RMLY T O ENSURE PROPER HEAT TRANSFER T O THE HEATSINK. Be careful t o connect t h e m properly. Slide heatsink assembly forward so that all LEDs are properly aligned in t h e front panel holes. Install and tighten t h e 8 heatsink mounting screws. Replace t h e seven screws o n t h e front panel. Replace t h e i n p u t l o u t p u t plate and b o t t o m cover (don't forget t h e four screws holding t h e b o t t o m cover t o t h e side rails). Power supply repairs. I I II \II I "9 a. Power supply PCB: D o not attempt removal o f this card. [. . . ] Reconnect all transformer spade plugs as shown on the power board assembly diagram. Schematics and assembly diagrams. SIGNAL LIMIT FAULT -059 C PINDUT, S T E R E O S W . JACK J1 7 1USLV 4 5 VIEW F R O M B O T T O M S I D E '3ETIp 3E RING POWER THERMAL [. . . ]