Crate BV 300H Preamp 07S109 Schematics

Page 1

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\ R55 \ 1
TEST POINT CONDITIONS: EVKII
- pa,
R50
120V LINE VOLTAGE 4 OHM LOAD R75
ALL DC VOLTAGES MEASURED WITH NO SIGNAL APPLIED. + C43 33 III
120V OC7 IpeI Spar
1 KHZ SINEWAVE m I
80 mVrms max xx @
2:: T CKTGND WI 7
ALL CONTROL @ '5' 83va W
EEK & UGH @ '10' f 9' m g 651
CKTGND I
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I
TO HT Rss 400V
5 3 GAIN 22M
IIZW
R76
7 7 7 W3 IMTLIISIG W Ivan
IIz
INPUT JACK BRD 1 J33 p1 . 9 Per
BAS 3 .
2 i X 2 S : cugs 9 PIN Rel-:5 2
I 7 2 PIN HDR $2 PIN HDR P2 4ro P3
CKTGND 9 :w BASS . TREBLE C50
IM LOG IM LOG TK
ID
ERIN R53 TREBLE 233V P5
IM C46 7 P cw LEVEL
7 7 7 IIZW 7 m C48 R72 R73 R77 50
Pe' jmav :: 7M 5 m h
0047 I W I 2w II2w MASTER
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_TGND 7
R62 EEIK
1,ng IIZW R7 R75
Iper 4
R49 Iper 2 2IK "127$
IIZW I
I32 #1 as: war W
A 2
Iper 55V
ZODer
LEOCO RIBBON LEOCO RIBBON
RCIA RCIE
MID
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3 4) 50K L P4 MID
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LEOCO RIBBON LEOCO RIBBON ITIAEIIUPEEIII
FIC4A RCAB EM
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CKTGND H mW £33: C49 302W I ' ' 7
4) Iouv j I Gui C'OL 1 $3UEQJAIgl-r In"; wn . Lhk) ADDED m . II
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15 9/13/02 UPDATED HO%KUF GEART. PAS SHOWN N00971
IUOV
T 0 5/29/02 CONTROL ISSUE _
CAUTION: 5% REV Dale DESCRIPTION Ecr(s)/Ecn(s) Chgd By Appvd by Date
THIS SCHEMATIC IS PROVIDED FOR USE BY QUALIFIED PERSONNEL. O 533' THE INFoRMATIoN comAINED THI DRAWING Is FROFRIETARV To
To AVOID RISK OF ELECTRIC SHOCK, REFER SERVICING TO QUALIFIED O m ST L°'S U 'C '"
SERVICE PERSONNEL. Do NOT PERFORM ANY SERVICING BEVOND CV ' - -
THAT EXPLAINED IN THE OPERATING INSTRUCTIONS. 5ng "SI? SIgnatures. Date. 2% ?WW
4 47 .
53: I533 D'awn- OBE'D 5/24/01 IIean Barman Dnve SI LOUIS. MO 53146 4
NIEESTION: SHOCK HAZARD I MID FREQ Cheeked: - Hm um on-
I 7
THIS UNIT CONTAINS HAZARDOUS VOLTAGE. DISCONNECT POWER 9'93: BV300Ha
AND BE SUE POWER SUPPLY IS DISCHARGED BEFORE. . . .
TOUCHING INTERNAL PARTS. CKTGND Tolerance: Drama Slzei C DIagEIEIIEMO 300W LEAD AMP
2 UNLESS NOTED RESISTOR VALUES IN OHMS 1/4W 5°/ TOL. : . - -
ICAPACITOR VALUES IN MICROFARADS 50V-10'% TOL. ° T mam Type' schema
3 VOLTAGES ARE MEASURED WITH 1 MEGOHM OSCILLOS PE - D N :
IAND 10 MEGOHM DIGITAL VOLTMETER. 00 Class Code. NONE rawmg umber 07S109-XX
pwb p/n oaAIas-m Sheet 1 OI 4
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