M800 fr series power amplifier service manual 1999, 2000 mackie designs, inc. 820-215-00 on off power professional power amplifier full symmetry dual differential high current design ol – 3 – 6 – 9 – 20 – 3 – 6 – 9 – 20 ol ch 1 28 26 24 18 20 16 22 14 12 6 0 0 1.23v (+4dbu) sensitivity gain/db 1.23v...
2 service on this equipment is to be performed by experienced repair technicians only.
3 contents introduction ..................................................................... 3 block diagram .................................................................. 4 specifications ................................................................... 5 connectors ............................
4 block diagram ch 1 balanced line input (trs) ch 1 balanced line input (xlr-f) limiter limiter on off on off limiter switch limiter detection limiter detection on off lo w cut fil ter freq cd eq freq on off lo w cut fil ter freq cd eq freq ch 1 gain stereo mono bridge stereo mono bridge stereo mono...
5 specifications maximum power, mid band: 175 watts per channel into 8 Ω 275 watts per channel into 4 Ω 400 watts per channel into 2 Ω 550 watts into 8 Ω bridged 800 watts into 4 Ω bridged note: power ratings are specified at 120vac line voltages. The m•800 power amplifier draws large amounts of cur...
6 average peak current current amplifier loading required required 2 Ω per side or 4 Ω bridged 7 a 16 a 4 Ω per side or 8 Ω bridged 4.5 a 11 a 8 Ω per side or 16 Ω bridged 3 a 6.5 a power consumption: 55 watts at idle 400 watts with musical pro- gram fully loaded (4 Ω per side, or 8 Ω bridged) 600 w...
7 connectors main board j34 2 -16v 4 6 send(2) 8 rtn(2) 10 +64v 12 14 1 3 5 7 9 11 13 amp-out(2) +16v send(1) amp-in (1) overtemp amp-out(1) bias t.P. Fan j7 bias t.P. Transformer secondaries r51 bias adjust j4 j10 j13 j16 j14 fuse f1 j15 j18 j17 j34 display board j2 j3 j9 j8 j1 j6 j5.
8 troubleshooting tips - output failures after a catastrophic failure, it is likely that the main supply fuse will be blown. Replace the fuse and very slowly bring up the variac while monitoring line consumption. It is likely that substantial line current will be pulled due to shorted output parts. ...
9 you must perform the following leakage test before returning the unit to your customer. Take every safety precaution to protect yourself while doing this test. 1. Make a small loading rc circuit as shown in the diagram below, and connect the ac volt meter between the ac power source ground and any...
10 bias and test procedure after the unit has been repaired, the following should be done to assure long term reliable operation. If a distortion analyzer is present, distortion specifications should be verified. 1. Adjusts bias in both channels (r51 & r60) for 30mv +/- 2mv at bias test points (j5 &...
11 circuit theory much of the circuitry in the m•800 is self explanatory from the schematics. This section will explain the unique circuits and architecture. Samples in this section will refer to channel-1 for circuitry that is identical on both channels. Input circuitry the signal path begins at th...
12 transient) the output stage is allowed to drive even higher amounts of current. This is accomplished by ac dividers consisting of r26, r76, c16 and r75, r87, c21. C17 and c20 provide for high frequency stability of the limiter, and d22 and d25 isolate this stage from the rest of the amp, when not...
13 to further insure stability of the amplifier, the output node is de-coupled from the load via l5, r187-r189. The values of these parts have also been selected to ensure good transient response (i.E. Square waves look like square waves, so the amplifier doesn’t sound unnaturally bright). The outpu...
14 the fan speed increases in the following instances: · when the heatsink is above 86°c. Comparator u5b’s output switches low when the heatsink-mounted temperature sensor’s output voltage increases to 860mv (86°c). The output of u5b is coupled to the fan controller via d80. Note: hysteresis for the...
15 quick parts 1/4" jack, mono 400-118-00 quad connector400-237-00 1/4" jack, mono 400-118-00 1/4" jack, stereo 400-287-00 xlr female 400-131-00 iec sub assy 080-135-00 xlr male 400-175-00 pot 130-073-00, knob 760-110-00 pot 130-072-00, knob 760-110-00 all switches 500-042-00 pot 130-072-00, knob 76...
16.
A-1 part# description pages 090-107-00 master parts a-2 080-105-00 heatsink subassembly a-3 055-212-00 main board a-4 055-218-00 display board a-6 m800 parts list parts numbering guide 040- cables 055- finished pcb assy 100- pots and resistors 200- capacitors 300- semiconductors 400- jacks/connector...
A-2 master parts list part # description rev qty notes 090-107-00 m800 amp 120v a3 a1 1 090-107-01 m800 amp 230v a1 1 090-107-02 m800 amp 100v a2 1 070-107-xx bomshell m800 a 1 040-240-00 rib 28ga 14c .100 16in a 1 040-242-00 dis 18g 1010 gryl 5in lqd a 1 040-312-00 dis 18ga 1010 brn 7.75 qk a 1 040...
A-3 part # description rev qty notes 080-105-00 sa heatsink m800 a1 a1 1 055-212-00-02 pcb assy m800 c3 c2 1 see page a-4 301-022-00 dio pwr bridge 25a 400v q a 1 410-016-00 silpad diecut k6 m800 a 1 550-396-00 brkt to-92 vert m800 a 1 550-563-00 brkt xstr clip m800 a 2 551-066-00 extr fab heatsink ...
A-4 part no. Description value reference designators 040-295-00 wire 18awg wht term/qd j1 j3 040-296-00 wire 18awg red term/qd j8 040-297-00 wire 18awg blk term/qd j9 040-347-00 cable assy, 18awg, gn/yw, 6 j33 100-017-00 resistor cf 47 5% r183-184 110-060-00 res cf .25w 5% 3k ohm 3k 5% r27-28 r36-37...
A-5 200-007-02 capacitor mylar t&r 0.01 c8 c46 200-015-02 capacitor mylar t&r 0.0047 c91 c94 200-023-00 capacitor, poly box .001uf 20% c89 c97 200-024-00 capacitor, poly box .01uf 20% c74 200-025-02 capacitor mylar t&r 0.56 c90 c100-101 c114 200-027-02 ply .1uf 5% 100v tr 0.1 5% c30-31 c35-36 c40-45...
A-6 130-070-00 pot rty 5k lin 9mm 21det 5kb 20% r2 r25 (gain pots) 140-065-00 resistor cf 470 5% r26 r31 140-068-00 resistor tf smt 620 5% r7 r17 140-076-00 resistor cf 1k3 5% r19 140-081-00 resistor cf 2k2 5% r1 r24 140-083-00 resistor tf smt 2k7 5% r13-14 140-087-00 resistor cf 3k9 5% r11 140-092-...
