6
7
8
2
3
4
5
OESCRIPTION
I DATE I
I 02-SEP-99 I
REVISIONS
PR 412
APPROVEO
dBL
D
D
CONNECT TO P101
ON POWER AMP ASSEMBLY
CONNECT TO PlOO
ON POWER AMP ASSEMBLY
&
JUMPER
W21
QTffl
....
,
�
C
INPUT
B
, 1111 1��M�iij!�M or1o l/ Y�
.Li n1�on;;�o1@�d□1«5io�1Jm �
�
iii H i i � ii �
PASSIVE/
ACTIVE
GAIN
PREAMP CLIP (RED)
SIGNAL PRESENT (YEL)
1
BASS
ROOM
BALANCE
TREBLE
LOW
FREQ
LOW
LEVEL
MID
LEVEL
MID
FREQ
HIGH
LEVEL
rt..11/Dle:
SERVICE DIAGRAM
DATABASC: Z412Pl.PCB
DATE: 02-SEP-H
o� 00� 6 ��J�! !imij·oo�M! �r··
HIGH
FREQ
� �
EQ
GAIN
�QJ
ON/OFF
I
TIMQ
�
M , •
L
COMPRESSOR
(ALSO ACTIVATED
BY FOOTSWITCH)
C
LPOWER
POWER AMP CLIP
MASTER
VOLUME
B
(LED FLASHES
WHEN MUTED)
I
A
A
T1IS DOalEIT carTAlli lf'IBAT1111 Cf"
AmTIIMJITIAlll■ILWTTDTO'NII■
Pm"IETAIT lf.1\111[TO FDaJI IIKAL
MUSICAL INSTRUMENTS
�
2621 Research Drive
Clllf1IDII:
I[ mm.al■
�•TO8Uil
DTIDIIDTsnarT
MmmZ­
Carano, CA 91720 USA
AT1111 FIOM FDIIDIJUS,N.. mTIIIEITS.
&_RtrER TO POWER AMP SERVICE DIAGRAM
P/N 0055682000 roR OUTPUT TEST SETUP CONDITIONS.
&c.l4 NOT STUFFED.
1. SEE SHEET 1 FOR TEST CONDITIONS AND
TEST POINT VALUES.
NOTES:
8
7
6
5
4
3
(\KISS OTIDIIS[ MDTID)
-2�
' '- •
I
A
T£
DRAft
D :
0.l!IIS
DATABASE FU:
2
�am
⇒-
0.l!IIS
DIAGRAM, COMBINED (PCB assy
I TITLE: SERVICE
BASSMAN 400 AMPLIFIER
PREAMP
I
s1zE
011Ar1NG IUIBER
DRELEASEI OAT :0055681000
OJ-SEP-II
I Sl£E 2
£
T
REV.
A
Of 2