Gallien-Krueger 250ML User manual

Service Manual
250ML
250RL
212SCL

Table of Contents
Operating Instructions 3
Turn On / Calibration rocedure 6
Schematics 9
Bill of Materials 15

SW-9/3/99 250ML INDENTED BILL OF MATERIALS
NOTE: Level 1 refers to main assmbly parts.
Level 2 refers to board level components.
Main assembly numbers are in bold face, while commonly
needed parts are italicized.
LVL PART# DESCRIPTION QTY REF. DESIG.
1 010-0012-0 MPSA06 NPN 80V 500MA TO-92 2
1 011-0023-0 TIP29C NPN 100V 1A TO-220 FP 1
1 011-1035-0 TIP30C PNP 100V 1A TO-220 1
1 012-0084-0 TIP 33CFP NPN 100V 10A TO218 2 Q13,27
1 012-1085-0 TIP 34CFP,PNP,100V,10A,TO-218,PECOR 2 Q17,31
1 025-0116-0 RED LED,1.5MCD,120 DEG,T-1 5
1 080-0062-0 TRANSFORMER,80W,120V,Z=4 1
1 082-0047-0 SPEAKER,6.5",80W,Z=16 PYLE-LEAD 2
1 090-0005-0 SWITCH,ROCKER,DPDT,4A,QUICK-TERM 2
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 1
1 093-0014-0 RECEPTICAL AC,Q-TERM 1
1 093-0032-0 HOUSING,3X.156,FEMALE 22GA,LOCK 1
1 093-0035-0 HOUSING,4X.156,FEMALE 22GA,LOCK 1
1 094-0013-0 HOLDER,FUSE,1/4 X 1 1/4,Q-TERM 1
1 094-0019-0 SOLDER LUG,#6 1
1 095-0005-0 POWER CORD,117V PLUG,DETACH 1
1 100-0012-0 GROMIT,3/16 X.100 1
1 100-0016-0 LOGO,3 INCH,CAST 1
1 100-0030-0 BUTTON,RECT BLACK CAP - PUSH SWITCH 6
1 100-0037-0 HEAT CLIP,TO-98 2
1 100-0042-0 HANDLE,RUBBER,6.5" 1
1 100-0057-0 KNOB BODY 18 SPLINE SHAFT 6
1 100-0062-0 KNOB CAP GRAY,FOR 100-0057 6
1 100-0065-0 CAP FOR 6.5" HANDLE “BLACK” 2
1 100-0076-0 FOOT,RUBBER,ROUND,5/8DIA. X 5/8" 4
1 111-0061-0 BOLT 4-40 3/8 PHP CAD 5
1 111-0081-0 BOLT 4-40 1/2 PHP CAD 8

LVL PART# DESCRIPTION QTY REF. DESIG.
1 111-3041-0 SCREW 4AB 1/4 PHP CAD 2
1 111-6001-0 NUT 4-40 KEP SMALL 7
1 111-6011-0 NUT 4-40 HEX SMALL CAD 6
1 111-7011-0 WASHER #4 SPLIT 6
1 112-0051-0 BOLT 6-32 5/16 PHP CAD 4
1 112-1040-0 BOLT 6-32 1/4 FHP 82^ B.O. 4
1 112-1050-0 BOLT 6-32 5/16 FHP 82^ B.O. 11
1 112-1100-0 BOLT 6-32 5/8 FHP 82^ B.O. 8
1 112-4080-0 SCREW 6AB 1/2 FHP 82^ B.O. 27
1 112-4081-0 SCREW 6AB 1/2 FHP 82^ CAD 1
1 112-6001-0 NUT 6-32 KEP LARG SIZE CAD 8
1 112-7001-0 WASHER #6 FLAT CAD 12
1 113-0080-0 BOLT 8-32 1/2 PHP B.O. 4
1 113-6011-0 NUT 8-32 KEP CAD 4
1 114-0080-0 BOLT 10-32 1/2 PHP B.O. 2
1 115-7005-0 WASHER 3/8 FIBRE FLAT 2
1 115-7021-0 WASHER 3/8 INTERNAL CAD 6
1 132-0034-B 250ML FRONT PANEL 1
2 112-6016-0 NUT 6-32 CAPTIVE 7
2 120-0007-0 ALUM .063 54
1 132-0349-A 200MK/MV TOP COVER 1
2 120-0005-0 ALUM .100 98
1 132-0379-B 200MV RIGHT SIDE 1
2 114-6046-0 NUT 10-32 CAPTIVE 1
2 120-0005-0 ALUM .100 96
1 132-0380-B 200MV LEFT SIDE 1
2 114-6046-0 NUT 10-32 CAPTIVE 1
2 120-0005-0 ALUM .100 96
1 132-0381-B 200MV GRILL 1
2 120-0004-0 STEEL,16GA,PERF,4’X10’X.060 144
1 132-0382-B 250ML REAR PANEL 1
2 112-6016-0 NUT 6-32 CAPTIVE 10
2 120-0005-0 ALUM .100 42

LVL PART# DESCRIPTION QTY REF. DESIG.
1 132-0389-F 250ML BACK SERIES 2,1 1
2 120-0005-0 ALUM .100 288
1 132-0391-D 250ML (II) BAFFLE, PYLE 1
2 120-0005-0 ALUM .100 288
1 160-0003-0 MANUAL,250ML-RL 1
1 202-0019-0 250ML II WIRE KIT 1
1 206-0049-A 250ML AMP 1
2 001-0001-0 MN3011 MULTI-TAP BBD 1 U27
2 001-0006-0 MN3007 1024 STAGE BBD 2 U28,29
2 001-1030-0 LF353N DUAL JFET OP AMP 15 U1,3,4,6,10,12,13,14,20,21,22,23,24,25,26
2 001-1038-0 LM386 LOW VOLTAGE POWER AMP 2 U18,19
2 001-2009-0 LM556CN DUAL TIMER 1 U31
2 001-3028-0 TL604 DUAL COMP ANALOG SWITCH 5 U7,11,15,16,17
2 002-0034-0 CD4013 DUAL D FLIP-FLOP 1 U30
2 010-0012-0 MPSA06 NPN 80V 500MA TO-92 9 Q2,3,5,6,8,11,15,20,25,29,34
2 010-1013-0 MPSA56 PNP 80V 500MA TO-92 6 Q15,18,22,23,24,28
2 010-2010-0 J113 N-JFET 35V 2MA TO-92 6 Q1,4,9,10,21,22
2 010-2040-0 J406 DUAL N-CH JFET 8PIN DIP 4 U2,5,8,9
2 011-0023-0 TIP29C NPN 100V 1A TO-220 FP 2 Q26,35
2 011-1035-0 TIP30C PNP 100V 1A TO-220 4 Q7,19,31,33
2 020-0036-0 1N747A,ZENER,3.6V,5%,400MW,DO-35 5 D5,15,16,35,36
2 020-0120-0 1N759A,ZENER,12V,5%,400MW,DO-35 4 D1,2,13,14
2 020-0160-0 1N966B,ZENER,16V,5%,400MW,DO-35 2 D33,34
2 020-1103-0 1N914 ,RECT-FAST,200MA,100V,4NS,DO-35 10 D3,4,6,9,10,11,12,23,30,32
2 020-2105-0 1N4002,RECT,1A,150V,DO-41 10 D20,21,22,25,26,27,28,29,31
2 023-0109-0 KBPC-102 BRIDGE RECT 3A,200V,C219K 1 BR1
2 030-0223-0 CAP,CERAMIC AXIAL,223,30%,16V 2 C16,19
2 030-1103-0 CAP,CERAMIC AXIAL,103,30%,25V 7 C7,25,28,48,57,101,102
2 030-2101-0 CAP,CERAMIC AXIAL,101,5%,50V 1 C2
2 030-2102-0 CAP,CERAMIC AXIAL,102,10%,50V 4 C24,28,100,109
2 030-2104-0 CAP,CERAMIC AXIAL,104,10%,50V,XR7,.3" 17 C6,11,12,17,27,34,35,36,37,38,39,47,56,
67,73
2 030-2222-0 CAP,CERAMIC AXIAL,222,10%,50V 15 C22,59,63,70,71,72,80,81,82,83,85,87,88

LVL PART# DESCRIPTION QTY REF. DESIG.
2 030-2224-0 CAP,CERAMIC AXIAL,224,20%,50V,XR7 5 C4,9,10,14,90
2 030-2271-0 CAP,CERAMIC AXIAL,271,10%,50V 11 C21,55A,66,68,69,78,81,84,86,89
2 030-2332-0 CAP,CERAMIC AXIAL,332,10%,50V 3 C13,32,75
2 030-2473-0 CAP,CERAMIC AXIAL XR7,473,10%,50V 4 C30,33,40,41
2 030-2561-0 CAP,CERAMIC AXIAL,561,10%,50V 2 C5,15
2 031-1227-0 CAP,ELECTROLYTIC RADIAL,227,-10%+50%,25V 7 C3,42,43,44,49,58,65
2 031-2227-0 CAP,ELECTROLYTIC RADIAL,227,-10%+50%,50V 2 C51,52
2 031-2335-0 CAP,ELECTROLYTIC RADIAL,335,20%,50V 22 C8,14A,18,20,23,29,31,46,55,57A,60,61,
62,64,79,91,92,93,94,95,96,97
2 032-4104-0 CAP,METALIZED POLYESTER,104,10%,100V 2
2 034-4101-0 CAP,CERAMIC DISK,101,10%,100V 4
2 038-2228-0 CAP,ELECTROLYTIC AXIAL,228,20%,50V 2
2 051-0100-0 RES,CARBON FILM,1 OHM,1/4W,5% 2 R1,R2
2 051-1001-0 RES,CARBON FILM,100 OHM,1/4W,5% 7 R15A,29,97,98,112,131,145
2 051-1002-0 RES,CARBON FILM,1K OHM,1/4W,5% 17 R17,25,26,49,53,54,56,59,83,107,115,118,
141,148,152,211
2 051-1004-0 RES,CARBON FILM,100K OHM,1/4W,5% 37 R23,34,39,41,42,43,52,55,58,68,69,70,74,
149,151,158,158A,166,170,171,176,180,
181,188,189,192,196,205,207,213,219,221,
223,224
2 051-1005-0 RES,CARBON FILM,1M OHM,1/4W,5% 9 R2,16,21,60,62,63,111,144,162
2 051-1203-0 RES,CARBON FILM,12K OHM,1/4W,5% 12 R1,4,32,65,72,73,110,142,194,195,212,227
2 051-1204-0 RES,CARBON FILM,120K OHM,1/4W,5% 12 R6,7,8,29,30,31,32,182,199,209,214,220
2 051-1504-0 RES,CARBON FILM,150K OHM,1/4W,5% 4 R28,202,209,217
2 051-2202-0 RES,CARBON FILM,2.2K OHM,1/4W,5% 11 R11,13,24,103,105,108,121,125,136,138,
140,159,161
2 051-2203-0 RES,CARBON FILM,22K OHM,1/4W,5% 5 R22,163,164,197,229
2 051-2204-0 RES,CARBON FILM,220K OHM,1/4W,5% 5 R81,82,85,87,88
2 051-2205-0 RES,CARBON FILM,2.2M OHM,1/4W,5% 1 R198
2 051-2206-0 RES,CARBON FILM,22M OHM,1/4W,5% 2 R19,67
2 051-3302-0 RES,CARBON FILM,3.3K OHM,1/4W,5% 4 R33,60,89,90,102,119,126,135,146,160,
228
2 051-3303-0 RES,CARBON FILM,33K OHM,1/4W,5% 16 R3,40,104,137,165,172,175,179,187,193,
196,230,232,233
2 051-3904-0 RES,CARBON FILM,390K OHM,1/4W,5% 1 R177
2 051-4701-0 RES,CARBON FILM,470 OHM,1/4W,5% 7 R15,99,100,101,119,128,130,132,156
2 051-4702-0 RES,CARBON FILM,4.7K OHM,1/4W,5% 8 R9,12,64,75,117,119,154,156

LVL PART# DESCRIPTION QTY REF. DESIG.
2 051-4703-0 RES,CARBON FILM,47K OHM,1/4W,5% 14 R5,48,76,78,109,143,167,168,173,174,183
184,190,191
2 051-4704-0 RES,CARBON FILM,470K OHM,1/4W,5% 1 R79
2 051-5602-0 RES,CARBON FILM,5.6K OHM,1/4W,5% 12 R44,45,47,51,77,116,150,215,222,225,231
2 051-5603-0 RES,CARBON FILM,56K OHM,1/4W,5% 11 R10,80,86,163,164,200,201,204,206,208,
210
2 051-5604-0 RES,CARBON FILM,560K OHM,1/4W,5% 2 R84,178
2 052-0000-0 RES,METAL WIRE, 0 OHM,1/4W,1% 8
2 054-2702-0 RES,CARBON FILM,2.7K OHM,1W,5% 4 R120,122,153,155
2 056-.330-0 RES,CERAMIC WW,.33 OHM,5W,10% 6 R106,123,127,133,139,157
2 056-0500-0 RES,CERAMIC WW,5 OHM,5W,10% 2 R124,134
2 070-0506-0 POT,50KA,9MM,PLASTIC KNURL 14MM,.05W 2 R20,38- VOLUME POTS
2 070-0508-0 POT,1K TRIM,6MM,SLOT,.3W 3 R14,96,114,147
2 070-0509-0 POT,20K TRIM,6MM,SLOT,.3W 4 R18,35,36,37
2 070-0514-0 POT,50KB,LINEAR,9MM,METAL KNURL 9MM,.1W 4 R46,50,61,71- TREBLE, MIDS, BASS
2 090-0013-0 SWITCH,PP,DPDT,.2A,PC MOUNT 6 S1,2,3,4,5,6 - ALL SWITCHES
2 092-0201-0 JACK SW-RN112APC,1/4",S-TIP,SLDR TERM 2 J1,7 - INPUT JACK
2 092-0202-0 JACK SW-RN114BPC,1/4",S-TIP,S-RING,P.C. 2 J2,3 - FOOTSW./PHONE JACKS
2 092-0203-0 JACK SW-RN111PC,1/4",O-TIP,P.C. TERM 3 J4,6,8
2 092-0204-0 JACK SW-RN112BPC,1/4",O-TIP,O-RING,P.C. 1 J9
2 093-0028-0 HEADER,3X.156,MALE,LOCK 1
2 093-0029-0 HEADER,4X.156,MALE,LOCK 1
2 145-0049-A 250ML BOARD 1
1 602-0007-0 FORMS,WARRANTY CARDS 1