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Ey Electro-Voice >| SERIES 8200/8400 HIGH-PERFORMANCE MIXING CONSOLES SERVICE MANUAL MODEL 8432 CONSOLE a gulton company ¡Ey SERIES 8200/8400 SERVICE MANUAL FREQUENCY RESPONSE Mic Input at Maximum Gain or Line Input at Unity Gain to Any Output: Any other input (except talkback) to any output DISTORTION Total Harmonic Distortion THD 20-20.000 Hz at +4 dBu' THD 20-20.000 Hz at +24 dBu HUM and NOISE" EIN - equivalent input nose (150-ohm source} Output Noise at Transformer Isolated Left and Right Quiputs, all faders down except as indicated, Stereo Masters and Subgroups at nominal ("0") One Input, Stereo Masters and Subgroups at nominal (64-08 gain} Output Noise at Transformer Isolated Monitor or Auxiliary Outputs, Masters at nominal ("0"), all faders down? INPUT CHANNEL EQUALIZATION Input Impedance, Mic Line Channel Returns Subgroup Returns (8400 Senes) Effects Return À and 8 Tape In Right, Leit (8400 Senes) Talkback Mic In (8400 Series) Stacking, Left, Aight: Subgroup 1-4 Solo Audio Mon, Aux 1 and Aux 2 Nominal Level, Mic. Gain Control ar “60” Ganrn Control at “20” Line, Gan Control Maximum Gain Control Minimum Channel Returns Subgroup Returns {8400 Senes) Effects Return À and 8 Stacking, Left. Right. Subgroup 1-4. (86400 Senes) Solo Audio Mon, Aux 1, and Aux 2 Maximum Level, MIC, Gan Control at 60 Gan Control at 20’ Lime, Gain Control Maximum Gan Control Mimmum Channel Returns Subgroup Returns (B400 Series) Tape In Right, Leit (8400 Seres) Talkback Mic In (8400 Series) Stackng. Left. Fight: Subgroup 1-4 (8400 Seres) Solo Audio Maximum Voltage Gain, Mic Input to Channel Send Output Line Input to Channel Send Outout Effects Returns (and Tape Input) to Trans'ormer Isolated Left and Right Outputs Talkback Input to Transtormer isolated Left and Right Output (8400 Seres) Mic Input to Transiormer Isolvated Left and Right Qutputs Slide Fader Reserve Gain Pan Control Center Attenuation CROSSTALK Adjacent Channel at t 000 Hz POWER REQUIREMENTS 95-125 volts. 60 Hz * 90 watts maximum 12 dB 20 -20.000 Hz £1 d8 50-20.000 dB 10.5 dB 20-20.000 Hz less than 0.19 less than 0.1% - 129 dBu typical - 76 deu maximum -65 dBu typical -80 dBu maximum 8.300 ohms 26,000 onms 5,000 ohms 8,000 ohms 20.000 ohms 24 000 ohms 10,000 ohms 47,000 ohms 20.000 ohms 30,000 ohms -50 dBu — 20 dBu -24 dBu +8 dBu -2 dBu -2 dB —? dBu —2 dBu -2 dBu —? dBu — 40 dBu 0 dBu -4 dBu +28 dBu +18 dBu +36 dB +30 dB +6 dB +36 dBu +18 dBu 58 dB typical 22 dB typical 38 dB typical 68 dB ‘ура! 88 dB typical MATERIALS Chassis Black painted metal with hight grey graphics Knobs and Switches Black and grey (3 shades) End Caps Black painted wood Arm Rest Black textured vinyl, padded Specifications DIMENSIONS Model 8208 Model 8212 Model 8216 cm in cm in cm in Height 22 85 Ze 8.5 22 85 Depth 46.7 18.4 46.7 18.4 46.7 18.4 Width 419 16.5 546 21.5 67.3 26.5 Met Kg le kg Ib kg Ib Weight 14.0 30.0 17.0 37.0 20.0 45.0 Model 8408 | Model 8416 | Model 8424 | Model 8432 cm in. cm in. cm in. cm in. Height 22.0 18.5 22.0 185 220 18:5 220 |85 Depth 46.7 118.4 146.7 1184 146.7 |184 |467 |184 Width 546 121.5 180.0 131.5 11050141.5 1131.0 151.5 Net k Ib ka lb Kg Ib Kg Ib Weight 17.0 137.0 |24.0 152.0 130.0 167.0 137.0 182.0 OUTPUTS Output Impedance, Channel Sends 560 ohms Unbalanced Mains, Mon, Aux. Salo (Subgroup Sends)® 68 ohms Transiormer isolated Mains, Mon. Aux, Solo 100 ohms Headphone 68 ohms Load Impedance, Channel Sends > 19,000 ohms Unbalanced Mains, Mon. Aux. Solo (Subgroup Sends)s 22,000 ohms Transformer Isolated Mars, Mon. Aux, Solo 500 ohms Headphone Any impedance Nominal Output, Channel Sends -2 dBu Unbalanced Mains, Mon, Aux, Solo (Subgroup Sends) -2 dBu Transformer Isolated Mains, Man, Aux. Solo +4 dBu Headphone B-chm Load — 22 dBu 500-ohm Load =? Ви Maximum Output, Channel Sends +18 dBu Unbalanced Mains. Mon, Aux, Solo Subgroup Sends} +18 dBu Transformer Isolated Mains Mon, Aux. Solo +24 dBu readphone, 8-ohm Load -2 dBu 500-ohm Load +18 dBu 1 0dBu sO; “gures May also be rad as oBm + 15 volts AMS sne wave Since the idad s specified at 600 ohme dBu a Dows measure where 0 dBm os 1 2 20-20 D00-Hz7 bandwadth, input gain at “50 3 Inout gan al “60.” 20-20.000-Hz bäandwidth, 150-ohm source mW no E00 ohms à Un special order. models for 100120. 220 and 240 volts. 50-50 Hz. are avalable E d 19 Ju 2 low OuipU! 5 prececded by a 20 dB pad Quiput impedance 5 1 800 ohms two |EY/| SERIES 8200/8400 SERVICE MANUAL GENERAL SERVICING INFORMATION Most EV circuitry is built around commonly available IC operational amplifiers. A certain amount of familiarity with operational amplfier theory and operation will facilitate servicing this unit. Throughout this manual, the following convention will be used when discussing the various amplifier stages: U1 (1). This is to be interpreted as follows: Chip designation U1, output pin = 1. The output pin of the op-amp is particularly significant because all of the unit's stages are referenced to ground. Thus, the normal quiescent voltage at any op-amp output is O volts DC, give or take a few millivolts. Any op-amp output that is not а! О volts DC is suspect, especially if it is at or near one of the direct supply rails. Beware, however, as much of the circuitry is direct coupled. Thus, it is important to look backward towards the input to localize the exact cause of trouble. DISASSEMBLY INSTRUCTIONS AND CIRCUIT BOARD MODIFICATIONS These modifications are for changing the signal takeoff point for the monitor, auxihary 1 and auxiliary 2 send controls, and the solo push button. Any combination of these modifications can be performed on any number of the inputs. To remove circuit boards: 1. Set the mixer on its right end (with the power cord at the bottom). Sixteen-channel and larger mixers should be supported so that they won't fall. 2. Remove the bottom cover held by #6 Phillips screws. 3. Unfasten the bottom pan held by #8 Phillips screws. There are two at each end of the bottom pan and the rest are along the front and back edges. Then swing the bottom pan open around the back edge so that the wiring connections are maintained. 4, Starting at channel one, remove the bus connectors down to the highest-number channel to be modified. Pull off the knobs from each channel and remove the nuts from the pots and the send and return jacks. Remove the hex screws at each end of the slide fader and then the #6 screw next to the line input jack. A slight push on the microphone connector will loosen the circuit board for removal. 5. To reinstall the boards, reverse this procedure. Be sure all pots have lockwashers on the inside, the slide fader spacer is properly installed, and the clip LED is fitted into its hole. To modify circuit board (refer to Figure 1): 1. The monitor-send control is set at the factory for pre-equalizer operation. To change it to post-equalizer, pre-fader, move one lead of R32 from the pre-equalizer position @ to the pre-fader position @. Do not move the other lead. 2. The auxiliary 1 send control is set at the factory for post-equalizer @, pre-fader operation. To change this, move one lead of R33 to the pre-equalizer © or postfader position @. Do not move the other lead. 3. The auxiliary 2 send control is set at the factory for post-fader operation. To change this, move one lead of R48 from the post-fader position @ to the pre-fader @ or pre-equalizer @ position. Do not move the other lead. 4. The solo switch is set at the factory for pre-fader operation To change it to post-fadzar, move R50 — both leads — to the position marked ‘’post-fader’' in Figure 1. Disassembly and General Service Information ey | CHANNEL PREAMP EQUALIZER PATCHING FADER BUFFER > a rae © PRE. YY POST: EQ FADER FADER MON. AUX ! 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Master) 500130 Screw, #6 x35 PHP, SEMS 400093 Push button, light grey 500202 Screw, #8 x 2 PHP, SEMS 400094 Push button, red 500069 Screw, #4-40 x34 SEMS 400053 Knob, fader, black 500707 Washer internal tooth lock 40009 O EA 500209 | Screw #8-32x V2 PHP 400096 Spacer, potentiometer 500117 Screw #6-32 x Va SEMS S070 НМ 303120 Fuse holder | ln COR TN pr 500290 Nut, Hex #8-32 500703 Washer, appearance : 500280 Lockwasher #8 500591 Hex nut, 34-32 | 303066 Line cord 500681 Washer, thin appearance | Г 500203 Screw 48-32 x % 500683 Washer, fiber flat 34” 303317 Fuse block 500712 Lockwasher, internal tooth 500125 Screw, #6 x Va a as - if | 452016 Insulator, fish paper ae ME TON 001 N - 500680 Washer 34 1.7. CAD > Lu Copé 1 Е 3 452017 Insulator, fish paper seo Serew #6-92 x9 SEMS 70 4-40 х 3% PHP 460164 Shield, electrostatic ЧМ Sor ОК 1 500073 Screw #4 x /2 SM, PHP eis ПЕНН ioe 1 460128 Mater clip 500113 Screw, #6-32 x Va PHP, SEMS 1 Wash | Nn lock 400056 Display 'leria 500182 asher internal tooth lock, #6 7 455005 Fluorescent display a me 1 500291 Nut, Kep 48-32 801089 Handrest - Model 8208 1 H - 1 500687 | Washer, appearance — Phi on el dr te Bi headphone jack 801091 Handrest - Model 8216 400085 Retainer, headphone jack 801092 Handrest - Model 8416 300126 Phone jack — headphone 801093 Handrest - Mode! 8424 500107 Screw #6 x Ya, SM 801094 Handrest - Model 8432 twenty