Crate BX 50a 07S779 Schematics

Page 1

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5 6 a 2 I
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CID 5 + 7 R84
22K m R13 05 USE
32 IK ' R83 "K
55 PF m D5 R37
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GAIN A Q 16, SHAPE Q 5. A LEVEL 9 5,
GAIN E 5: MASTER. TONES 8 5. OCTAVE 9 9,
CHANNEL 5 CLEAN. seam INPUT semv DTP

IZDVAC No LOAD

Sofia; S/IIIAFEE fig D.C. SPECIAL CONDITIONS
1 m 200mV i
2 In 150mv i
a ru 3 5v 7 CHANNEL A SELECTED
4 r\_I av - CHANNEL A SELECTED
5 m 1.5v i CHANNEL A SELECTED
s x 21mm -
7 m 450ml 7
a m 7DOmV i
9 12 50on 22v +MV
In mfgsom 12v 7
o 11 1- J .7 sum -
mm 12 m 15v 7
R59 13 m 15v -
14 i i W
15 i i I? Eimitéiitifig
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17 i ,2 RIPPLE 21v
m - ,2 RIPPLE 721v
19 i 7 14V
20 - - 44v
Power Table
Ref Des Devicepre) Package CicND -vs +VS +15v -15v -15vx +15vx
DI 57e72e1_ EDIPJI a 4
D2 3725ee1_H rDAzexxH 5 5
U3 37250@I_H rnAzexxH 3 5
U4 37272e1_ aDIFS s 4
U5 57e72e1_ EDIPJI a 4
D5 37272e1_ aDIFS s 4
D7 57e72e1_ EDIPJI a 4
D5 37272e1_ aDIFS A a
DI2 57413e1_ 14mm 7 IA
0 12.13.00 CONTROL ISsuE
A INITIAL ISsuE D000644
CAUTION: REV Dare DESCRIPTION Ecr(s)/Ecn(s) Chgd By Appvd by Date
THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL. THE INFORMATIONgerggflgggugwfifimwwe IS pnapmmnv To
TO AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL. DO NOT PERFORM ANY SERVICING BEYOND Signatures: Date:
THAT EXPLAINED IN THE OPERATING INSTRUCTIONS.
DEW": 3 5'6'00 11330 Barman Drive, S1. LouIs, MO SSIAS
NOTES: Checked: First Used On:
1) CAUTION: SHOCK HAZARDI! Released. BX50a
THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER '
41513 gHEl SETET'EORWEE §E§F%Y IS DISCHARGED BEFORE Tolerance; DrawIng Size: 0 DrawmgSW A _ BASS AM PLI FIER
2) UNLESS NOTED, RESISTOR VALUES IN OHMS, 1/4W-5% TOL. Drawing Type: Schematic
CAPACITOR VALUES IN MICROFARADS, SUV-10% TOL. . .
3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE CIass Code: NONE Drawlng Number.
AND 10 MEGOHM DIGITAL VOLTMETER. 07S779-XX
Sheet 1 of 2
A B C D E F

Page 2

A B
D E F
R02
J2
FOOTSWITCH 2
RING : R74
RINGjW 4 1 5K
PESW 5 37 CHAN
TIP D24
5 , lRED
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SLEEVE m R 1
a 1
FLAT CABLE JWOFTQ 5W?
DO NOT INSTALL 4m 0mg
JWOPTZ! MP5 m3
SWI /77
R75 DPDT DUAL
JWOFTI - A A ,1 R78
USE JWOPT1 ON 5, 47K W
m .02 ASSV ONLV © (9
EXT SPEAKER I 013
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4 7K
CHANNEL NOT USED
SWITCH
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4; I I
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5 9 C28 15 DI4
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RSKI H H 55 DGND 1ro DEGND 7 INSADI
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DID + TaTTAa
HEADPHONE Nm
4 RING 2 2 F 4700 LIE
50V DIE
DH INéqflfTR
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+ NGPZT D10 & D11 NOT USED Nm
R32 I /. 07
00 2 ON 702 ASSV TDAZDSD
sLVE,sw 56'2V C29 M INSAm 5
SLEEVE SPEAKER 1 F Elm I/2w
TRS maV J12
R27 can Em
22K R30 3 3
NOT USED ON 4 7 0;: DEGND m a
DASH .02 ASSV 023 UNECORD
22
55" $1M
DEGND
BROWN
TO AC ROW
SWITCH VOLTS _
0 12.15.00 CONTROL ISSUE RLB
GR V/WH
TO AC GR Y/WHT A INITIAL ISSUE D0
CAUTION. SWITCHfiVOLT REV D 00644
_ ate DESCRIPTION E E
TaliiggEMATIC Is PROVIDED FOR USE BY QUALIFIED PERSONNEL. (5V (5) 09 BY APPV" by We
RISK OF ELECTRIC SHOCK, REFER SERVICIN T THE INFORMATION CONYAINED ON THIS DRAWINu IS PROPRIETA v10
SERVICE PERSONNEL. DO NOT PERFORM ANY SERVIcfiVC%E$éHSIED 1 QQVAC 23®VAC 24®VAC _ 9- Lou's MUSICI INC
THAT EXPLAINED IN THE OPERATING INSTRUCTIONS. 59/ 69H Z 58/ 66 H Z 56/ 68 H Z Signatures: Date:
NOTES' Drawn: RLB 6'6'00 11am Holman We. 51, Lows. Mo 63145 4
TcH/IgIJIISJJIII CSEECK HAZARD TO AC BLUE BLUE Checked: First Used On:
TAINS HAZARDOUS VOLTA E. DI fl '
AND BE SURE POWER SUPPLY IS DISCHAISGED gggfiECT POWER SWTCH VOLT Released' BXSOa
TOUCHING INTERNAL PARTS. Plot Dale'Mon Dec18 2000 Drawing Size' C Drawing Title'
2) UNLESS NOTED, RESISTOR VALUES IN OHMS 1/T4wL 5% TOL. I I I -
CAPACITOR VALUES IN MICROFARADS 50V- 10%T J9 WH'TE J9 J9 WHITE leTime: Inns Drawing Type: Schematic PWA ' BASS AMPLIFIER
3) VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOSCOPE AC 7) AC 7 AC .
AND 10 MEGOHM DIGITAL VOLTMETER. NEUTRAL NEUTRAL > NEUTRfl Tolerance: 0'3 (We: NONE WWW WW
A Sheet 2 ol 2 078779-XX
B
C D E F