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2-4.
AMP BOARD, JACK BOARD
Note 1: When installation leads and assembling set,
refer to DRAW AROUND LEAD WIRE.
Note 2: It is not necessary to remove AMP board
to remove jack board.
1 Remove four solders of lead
from speaker unit (SP1/SP2).
2 two screws
(P2 × 5)
1 Remove solder of lead.
1 Remove three solders of cord (with plug).
1 Remove two solders of lead (yellow, brown)
from jack board and solder of lead (red)
from "spring, plug battery".
2-5.
DRAW AROUND LEAD WIRES
Note 1: It is possible that lead wire are caught between the "case, front" and "case, rear" and cut.
Draw around lead wires as shown in the figure.
lead wire
(speaker unit (SP2) (R ch)
-AMP board)
lead wire
(speaker unit (SP1) (L ch)
-AMP board)
AMP board
natural color
– +
green
green
"case, rear"
lead wire
(AMP board condenser (C22) minus side
lead wire (blown)
-jack board)
(AMP board-jack board)
lead wire (black)
(jack board-"spring, minus battery")
Note 3: When installation AMP board,
fit switch (S1) and "knob, switch".
knob, switch
S1
3 AMP board
6 jack board
5 two screws
4 Remove two solders of lead (yellow, brown)
(P2 × 5)
from AMP board and solder of lead (black)
from "spring, minus battery".
red
natural color
lead wire (red)
(AMP board-"spring, plus battery")
red
lead wire (yellow)
(AMP board-jack board)
natural color
jack board
cord (with plug)
Note 2: Put the knot of the cord (with plug)
in the groove of "case, rear".
3-1.
BLOCK DIAGRAM
P1
(LINE INPUT)
MUTING
Q1
4 Remove solder
of lead.
MUTING
Q2
• SIGNAL PATH
: LINE INPUT
5
5
SECTION 3
DIAGRAMS
S1
POWER
OFF/DIRECT
POWER AMP
ON
IC1
S1 (1/4)
IN1+
OUT1
SP1
POWER
12
19
(L-CH)
AMP
IN2+
OUT2
POWER
9
2
AMP
S1 (2/4)
POWER AMP
IC2
SP2
S1 (3/4)
(R-CH)
IN1+
OUT1
POWER
12
19
AMP
IN2+
OUT2
POWER
9
2
AMP
+
+
S1 (4/4)
SRS-T77
LIMITER
B+
Q3
D2
DRY BATTERY
POWER
SIZE "AA"
(IEC DESIGNATION R6)
4PCS. 6V
JK1
DC IN 9V
!
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