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Service Manual
200MK / RK
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Table of Contents
Operating Instructions 3
Turn On / Calibration Procedure 6
Schematics 7
Engineering Change Orders (ECOs) 18
Bill of Materials 21
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200MK / 200RK TURN-ON PROCEDURE
2/1/88 Rev . 9/28.99-SW
1) Inspect board.
2 ) Observe the following: variac at 0, no load, speaker load on, cabinet speaker off, tones on 10, master on 0, R5 clockwise, R291 Counter-
clockwise, all switches out.
3 ) Gradually adjust variac to 20Vrms.
U23/8= 3.2V +or - .5V , U23/4= 1.3V +or - .5V.
Reg. Supplies 4V +or - .5V ,-2.6V +or - .5V .
4 ) Gradually adjust variac to 70V rms. Watch variac (amps), scope and listen to speaker. Amp should not draw current. Output will go –4V, then
6V , then snap to 0 between 30-40V rms.
U23/8= 11.5V +or - .5V, U23/4= -11.5V +or - .5V .
Reg. Supplies 14.5V +or - .5V ,-14.5V +or - .5V .
5 ) Continue to adjust to 120Vrms. Supplies + or- 45V + or - .5V.
6 ) Turn speaker load off.
7 ) Adjust bias. Adjust R224 to get a 5mV bias across R214, 225 (most positive of the two), and R240, 241 (most negative of the two).
8 ) Set the following: 400Hz sine wave 500mVrms at piano input, master 10, limit switch on.
9 ) Limiter adjust. Adjust R191A to get a flat response at U24/2. Compare to limiter response figure. Turn off.
10 ) Set the following: master 0, 4 ohm load.
11 ) Full power, limiter , and current limiter test. Gradually turn up master until clipping. Output = 20V rms and clip evenly . Turn up master to 10.
Output should hit the rails hard. Engage limiter. Output should swell down from heavy clipping then swell up to full power without clipping
or bouncing. Change to 2 ohm load- output should be a clean sine wave without clipping and = 12Vrms. Change to no load and di sengage
limiter.
12) Set master to 5.
1 3 ) Output should = 35Vrms. Plug into Synth. 1, then 2. Output should remain the same for all 3 inputs.
14) Plug into Monitor In. Output should = 27Vrms.
1 5 ) Plug back into Piano Input and measure direct outs = 8Vp-p.
16 ) Check line out. Should be clean sine wave and = 750mVrms.
1 7 ) Check headphones. Should have slight clipping with 15Vp-p.
1 8 ) Compressor test. Engage compressor. Output will attenuate and = 19V rms without clipping. T urn up input signal 10dB. Output = 33V rms
without clipping. Turn signal down 20dB. Output = 10V rms without clipping. Disengage compressor .
1 9) Chorus adjust. Engage chorus. Amplitude will vary up and down at output. Check direct out in stereo mode. D.O.’s should look different
but at same frequency. In mono mode, D.O’s should look same. Repeat (18)- (compressor test) for Synth. 1 and Synth. 2 inputs.
20 ) Echo adjust. Engage echo. Adjust R84 to get 400mVrms at U10/6.
21) Change the following: square wave input 400Hz 500mVp-p, tones at 5, master at 9 o’clock position.
2 2) Check tone controls for each input and compare to figures.
2 3) Engage echo and compare to echo figure for each input channel.
24) Turn on speaker cabinet and do quick audio test with echo on, then chorus on for each input channel.
25) Noise and tap test.
T ones 10, Master 10, switches in – noise < 20mVrms.
T ones 10, Master 0, switches out – noise < 2.2mV rms
Noise should be clean without popping or crackling. Sharply tap the amp on the bench a few times to make sure nothing fails.
Ready For Burn-in
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200MK INDENTED BILL OF MA TERIALS
NOTE: Level 1 refers to main assembly parts.
LVL PART# DESCRIPTION QTY REF . DESIG.
1 010-0012-0 MPSA06 NPN 80V 500MA TO-92 1
Level 2 refers to board level components.
Main assembly numbers are in bold face, while
commonly needed parts are italicized.
1 011-0023-0 TIP29C NPN 100V 1A TO-220 FP 1
1 011-1035-0 TIP30C PNP 100V 1A TO-220 1
1 012-0085-0 TIP-35CFP NPN 100V 25A TO218 2
1 012-1086-0 TIP 36CFP,PNP,100V,25A,TO-218,PECOR 2
1 025-0116-0 RED LED,1.5MCD,120 DEG,T-1 1
1 080-0488-0 X-FORMER BACKLINE,DOMESTIC 1
1 082-0039-0 SPEAKER,12",80W,Z=8,PYLE FOAM EDGE 1
1 082-0045-0 SPEAKER,3",Z=16,PYLE TWEETER 1
1 091-0003-0 FUSE, 3A,125V,1/4X1 1/4,SLB 1
2 799-TEST-0 TRY OUT 0
1 092-0045-0 XLR,MALE,X70101 LUGS 2
1 092-0064-0 Q-CON, .25 TAB,18-22GA,INSULA TED 8
1 093-0014-0 RECEPTICAL AC,Q-TERM 1
1 093-0032-0 HOUSING,3X.156,FEMALE 22GA,LOCK 2
1 094-0013-0 HOLDER,FUSE,1/4 X 1 1/4,Q-TERM 1
1 094-0018-0 SOLDER LUG,#4 1
1 095-0005-0 POWER CORD,117V PLUG,DETACH 1
1 100-0005-0 WASHER,RUBBER,1/8ID X 3/8OD X 1/8T 4
1 100-0027-0 BUTTON,ROUND BLACK CAP - PUSH SWITCH 10
1 100-0030-0 BUTTON,RECT BLACK CAP - PUSH SWITCH 1
1 100-0031-0 WASHER,#4,RECT,TO-220 MGT 2
1 100-0037-0 HEAT CLI P,TO-98 1
1 100-0038-0 BUMPER,ROUND RUBBER,5/8X5/16 2
1 100-0072-0 GROMMET ,.187 I.D. 4
1 100-0076-0 FOOT,RUBBER,ROUND,5/8DIA. X 5/8" 4
1 100-0080-0 HANDLE RUBBER,10" 1
1 100-0098-0 KNOB,GRAY,6X15MM SPLINE SHAFT 7
1 100-0108-0 X-FORMER BRACKET,FOR BACKLINE 4
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LVL PART# DESCRIPTION QTY REF . DESIG.
1 111-0061-0 BOLT 4-40 3/8 PHP CAD 4
1 111-0081-0 BOLT 4-40 1/2 PHP CAD 9
1 111-3041-0 SCREW 4AB 1/4 PHP CAD 4
1 111-4080-0 SCREW 4AB 1/2 FHP 82^ B.O. 8
1 111-6001-0 NUT 4-40 KEP SMALL 3
1 111-6011-0 NUT 4-40 HEX SMALL CAD 5
1 111-7011-0 WASHER #4 SPLIT 4
1 112-0051-0 BOLT 6-32 5/16 PHP CAD 4
1 112-1050-0 BOLT 6-32 5/16 FHP 82^ B.O. 4
1 112-1 100-0 BOLT 6-32 5/8 FHP 82^ B.O. 4
1 112-4080-0 SCREW 6AB 1/2 FHP 82^ B.O. 4
1 112-6001-0 NUT 6-32 KEP LARG SIZE CAD 1
1 112-7001-0 WASHER #6 FLA T CAD 4
1 112-9060-0 TR-BOLT 6-32 3/8 FHP B.O. 38
1 113-0080-0 BOLT 8-32 1/2 PHP B.O. 4
1 113-0080-0 BOLT 8-32 1/2 PHP B.O. 4
1 113-0221-0 BOLT 8-32 1 3/4 PHP CAD 4
1 113-6011-0 NUT 8-32 KEP CAD 4
1 113-6011-0 NUT 8-32 KEP CAD 8
1 114-0080-0 BOLT 10-32 1/2 PHP B.O. 2
1 114-701 1-0 WASHER #10 FLAT CAD 4
1 115-7005-0 WASHER 3/8 FIBRE FLA T 3
1 115-7021-0 WASHER 3/8 INTERNAL CAD 5
1 130-0000-0 OVERLAY,MICRO BASS GRILL-112 1
1 132-0349-A 200MK/MV TOP COVER 1
2 120-0005-0 ALUM .100 98
1 132-0350-B 200MB-MK RIGHT SIDE 1
2 114-6046-0 NUT 10-32 CAPTIVE 1
2 120-0005-0 ALUM .100 164
1 132-0351-B 200MB-MK LEFT SIDE 1
2 114-6046-0 NUT 10-32 CAPTIVE 1
2 120-0005-0 ALUM .100 164
1 132-0356-B 200MK GRILL 1
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LVL PART# DESCRIPTION QTY REF . DESIG.
2 120-0003-0 STEEL,16GA,PERF,3’X10’X.060 0
2 120-0011-0 STEEL,18 GAUGE JET COAT,.048 272
1 132-0360-D 0000 200MK BACK 1
2 120-0005-0 ALUM .100 406
1 132-0361-B 200MK BAFFLE 1
2 120-0005-0 ALUM .100 384
1 132-0362-B 200MK FRONT PANEL 1
2 112-6016-0 NUT 6-32 CAPTIVE 5
2 120-0007-0 ALUM .063 54
1 132-0363-B 200MK REAR P ANEL 1
2 112-6016-0 NUT 6-32 CAPTIVE 10
2 120-0005-0 ALUM .100 42
1 160-0006-0 MANUAL,200MK 1
1 160-0006-0 MANUAL,200MK 1
1 202-0016-0 200MK WIRE KIT 1
1 206-0050-C 200MK-RK AMP 1
2 001-0001-0 MN3011 MUL TI-T AP BBD 1 U24
2 001-0006-0 MN3007 1024 STAGE BBD 2 U25,28
2 001-1030-0 LF353N DUAL JFET OP AMP 18 U1,3,4,5,6,7,8,9,12,15,16,17,18,20,22,23,29,30
2 001-1038-0 LM386 LOW VOLT AGE POWER AMP 2 U13,14
2 001-2009-0 LM556CN DUAL TIMER 1 U27
2 001-3028-0 TL604 DUAL COMP ANALOG SWITCH 2 U1 1,19
2 001-4043-0 NE571 DUAL COMP ANDOR 3 U2,10,21
2 002-0034-0 CD4013 DUAL D FLIP-FLOP 1 U26
2 010-0012-0 MPSA06 NPN 80V 500MA TO-92 5 Q4,6,7,14
2 010-1013-0 MPSA56 PNP 80V 500MA TO-92 5 Q3,5,13,16,18
2 010-2010-0 J113 N-JFET 35V 2MA TO-92 2 Q1,2
2 011-0023-0 TIP29C NPN 100V 1A TO-220 FP 1 Q8
2 011-1035-0 TIP30C PNP 100V 1A TO-220 2 Q9,19
2 020-0036-0 1N747A,ZENER,3.6V,5%,400MW,DO-35 4 D5,6,16,17
2 020-0120-0 1N759A,ZENER,12V,5%,400MW,DO-35 8 D1,2,3,4,7,8,18,19
2 020-0160-0 1N966B,ZENER,16V,5%,400MW,DO-35 2 D29,30
2 020-0200-0 1N968B,ZENER,20V ,5%,400MW,DO-35 1 D31
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LVL PART# DESCRIPTION QTY REF . DESIG.
2 020-1103-0 1N914 ,RECT-FAST ,200MA,100V,4NS,DO-35 11 D9,10,11,12,13,14,20,21,22,23,24
2 020-2105-0 1N4002,RECT,1A,150V,DO-41 5 D25,26,27,28,32
2 023-0109-0 KBPC-102 BRIDGE RECT 3A,200V ,C219K 1 BR1
2 030-0223-0 CAP,CERAMIC AXIAL,223,30%,16V 2 C23,121
2 030-1103-0 CAP,CERAMIC AXIAL,103,30%,25V 6 C12,41,104,109,11 1,120
2 030-2101-0 CAP,CERAMIC AXIAL,101,5%,50V 8 C1,2,6,20,25,28,29,96
2 030-2102-0 CAP,CERAMIC AXIAL,102,10%,50V 2 C119,122
2 030-2104-0 CAP,CERAMIC AXIAL,104,10%,50V,XR7,.3" 9 C34,C51,C52,C56,C57,C72,C79,C94,105
2 030-2222-0 CAP,CERAMIC AXIAL,222,10%,50V 21 C13,22,26,32,46,47,50,62,63,64,65,68,69,73,
2 030-2271-0 CAP,CERAMIC AXIAL,271,10%,50V 9 C21,48,49,67,71,75,77,82,86,103
2 030-2470-0 CAP,CERAMIC AXIAL,47,5%,50V 1 C89A
2 030-2473-0 CAP,CERAMIC AXIAL XR7,473,10%,50V 6 C19,31,33,36,55,58
2 030-2474-0 CAP,CERAMIC AXIAL Z5U,474,20%,50V 1 C126
2 030-2561-0 CAP,CERAMIC AXIAL,561,10%,50V 1 C11 5
2 031-1227-0 CAP,ELECTROLYTIC RADIAL,227,-10%+50%,25V 13 C3,53,54,59,85,97,100,108,112,116,118,120A,
2 031-2227-0 CAP,ELECTROLYTIC RADIAL,227,-10%+50%,50V 1 C107
2 031-2335-0 CAP,ELECTROLYTIC RADIAL,335,20%,50V 45 C3A,4,5,7,8,9,10,11,14,15,16,17,18,24,27,30,
2 038-2478-0 CAP,ELECTROLYTIC AXIAL,478,20%,50V 2 C101,102
2 051-0100-0 RES,CARBON FILM,1 OHM,1/4W,5% 47 R6,11,13,28,34,36,42,46,47,52,53,63,69,70,73,
74,76,78,81,83,84,016,110
125
35,37,38,39,40,42,43,44,45,60,61,66,70,80,87,
88,89,90,91,92,93,95,98,99,113,114,117,123,
124
79,81,83,85,88,92,105,107,111,116,117,123,
162,168,169,171,173,174,175,177,186,211,
222,240,243,261,265,267,283,292,303,304
2 051-0101-0 RES,CARBON FILM,10 OHM,1/4W,5% 5 R127,130,132,133,224
2 051-0221-0 RES,CARBON FILM,22 OHM,1/4W,5% 1 R277
2 051-0470-0 RES,CARBON FILM, 4.7 OHM,1/4W,5% 2 R237,247
2 051-1001-0 RES,CARBON FILM,100 OHM,1/4W,5% 2 R226,244
2 051-1002-0 RES,CARBON FILM,1K OHM,1/4W,5% 12 R3,9,12,93,104,134,193,206,212,232,266,284
2 051-1004-0 RES,CARBON FILM,100K OHM,1/4W,5% 38 R7,10,15,19,29,32,58,60,80,82,84,106,138,141,
2 051-1005-0 RES,CARBON FILM,1M OHM,1/4W,5% 9 R2,40,51,68,90,91,94,95,198
2 051-1203-0 RES,CARBON FILM,12K OHM,1/4W,5% 23 R1,26,43,76,97,109,112,125,128,131,152,153,
157,161,164,172,178,180,185,188,190,191,192,
209,210,257,258,260,270,271,272,287,288,291,
295,297
154,155,203,213,214,215,242,268,281,282,298
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LVL PART# DESCRIPTION QTY REF . DESIG.
2 051-1204-0 RES,CARBON FILM,120K OHM,1/4W,5% 5 R187,256,259,269,289
2 051-1504-0 RES,CARBON FILM,150K OHM,1/4W,5% 2 R252,255
2 051-2202-0 RES,CARBON FILM,2.2K OHM,1/4W,5% 8 R8,41,118,124,149,150,197,229,246
2 051-2203-0 RES,CARBON FILM,22K OHM,1/4W,5% 29 R4,31,35,37,39,45,49,50,54,57,59,62,66,71,72,
2 051-2204-0 RES,CARBON FILM,220K OHM,1/4W,5% 4 R216,217,219,221
2 051-2206-0 RES,CARBON FILM,22M OHM,1/4W,5% 1 R16
2 051-3302-0 RES,CARBON FILM,3.3K OHM,1/4W,5% 6 R135,136,230,231,248,279
2 051-3303-0 RES,CARBON FILM,33K OHM,1/4W,5% 16 R30,114,119,122,139,140,145,151,158,163,165,
2 051-3304-0 RES,CARBON FILM,330K OHM,1/4W,5% 2 R144,199
2 051-3904-0 RES,CARBON FILM,390K OHM,1/4W,5% 2 R143,179
2 051-4701-0 RES,CARBON FILM,470 OHM,1/4W,5% 5 R218,220,225,227,228
2 051-4702-0 RES,CARBON FILM,4.7K OHM,1/4W,5% 6 R126,129,148,156,207,208
2 051-4703-0 RES,CARBON FILM,47K OHM,1/4W,5% 16 R20,21,25,55,74,99,101,137,142,159,160,166,
2 051-4704-0 RES,CARBON FILM,470K OHM,1/4W,5% 1 R98
2 051-5602-0 RES,CARBON FILM,5.6K OHM,1/4W,5% 21 R17,18,23,24,27,44,48,56,61,64,65,75,78,196,
2 051-5603-0 RES,CARBON FILM,56K OHM,1/4W,5% 8 R14,38,204,251,253,254,262,263,264
86,87,89,100,108,110,113,115,120,176,194,
205,238,245,280
170,181,189,278,299
167,182,183,202
200,273,274,276,285,286,296
2 052-1213-0 RES,METAL FILM,12.1K OHM,1/4W ,1% 8 R290,293,300,302,305,306,307,308
2 054-2702-0 RES,CARBON FILM,2.7K OHM,1W,5% 4 R195,235,236,241
2 056-.330-0 RES,CERAMIC WW,.33 OHM,5W ,10% 4 R223,234,249,250
2 056-0500-0 RES,CERAMIC WW,5 OHM,5W ,10% 1 R239
2 070-0508-0 POT,1K TRIM,6MM,SLOT ,.3W 1 R233
2 070-0509-0 POT,20K TRIM,6MM,SLOT ,.3W 6 R5,146,147,201,294,301
2 070-0514-0 POT,50KB,LINEAR,9MM,METAL KNURL 9MM,.1 6 R22,33,67,77,96,102- all other pots
2 070-0523-0 POT,2X50K LIN,9MM,METAL KNURL NOBLE.05 1 R121- master pot
2 090-0010-0 SWITCH,PP,DPDT,6A,PC TERM 1 S9
2 090-0014-0 SWITCH,PP,DPDT,.2A,BREAK/MAKE,PC MOUNT 10 all other switches
2 092-0201-0 JACK SW-RN1 12APC,1/4",S-TIP ,SLDR TERM 4
2 092-0203-0 JACK SW-RN1 11PC,1/4",O-TIP,P .C. TERM 2
2 092-0204-0 JACK SW-RN112BPC,1/4",O-TIP,O-RING,P .C. 2
2 093-0028-0 HEADER,3X.156,MALE,LOCK 2
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