Block Diagram - Alpine 3554 Service Manual

Disassembly Instructions
1. Removal of Bottom Cover.
(1) Remove four screws marked "O "as shown in
Figure 1.
(2) The Bottom Cover will be removed by pulling out
in the arrow direction as shown in Figure 1.
2. Removal of Amp P.C.Board.
(1) After removal of the Bottom Cover, remove 31
screws marked " @". Then, the Amp P.C.Board will
be removed from heat tank together with Rear
Chassis and RCA, Output Connector and Power
P.C.Board as shown in Figure 2.
(2) Remove two screws marked "MM _" and the solders
located two placed as shown in Figure 3.
(3) After removal of two pieces of fuse, remove seven
screws marked" & " and the hooks located at six
places as shown in Figure 4.
(4) After the above procedures are completed, RCA,
Output Connector and Power P.C.Board is ready
to be removed from Rear Chassis together with
the Main P.C.Board.
Figure 3
BOTTOM COVER
OUTPUT CONNECTOR
P.C.Board Figure 2
FUSE
HOOK
Figure 4
Block Diagram
FILTER
$102-|
eH) Icio 1/2) Ae ret 1e2021I/2)
ql
LOW PASS
FILTER AMP
Ic2ol(1/2)
pyr siol-t
vRIOI~| ay
GAIN
CONTROL VARIABLE
ETIO2-1
CHI @—- R-CH
(R-CH)
OFF INPUT MODE
{ $301-|
LOW PASS L MONO
$20!-| FILTER AMP
'
VR301-1 FIXED \C401(1/2)
GAIN LP ST
CONTROL VARIABLE R-CH {
L+R
ETIO2-3
CH3 ~©@+-—> R-CH
(R=CH)
DRIVER,
POWER
Amp, Te
— STAGE —
0503,504
Dc—pCc REGULATOR
BUFFER 1. V- STABILIZER CONVERTER SWITCHING
—STAGE- Q530 CONTROL
Q501— 514 Ic501
BUFFER
— STAGE— ~
V-STABILIZER
Q53)
DRIVER,
POWER
AMP.
— STAGE-
-B
SWITCHIN:
Q5I6