SRS-T70
3-3.
SCHEMATIC DIAGRAM
– 9 –
– 10 –
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
C
: panel designation.
•
U
: B+ Line.
• Power voltage is dc 9 V and fed with regulated dc power
supply from external power voltage jack.
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : POWER ON
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F
: LINE INPUT
• IC Block Diagram
IC1, 2
TEA2025D-013TR
20
19
18
17 16 15 14
11
+
–
13 12
+
–
THERMAL
PROTECT
START
CIRCUIT
10
9
8
7
6
5
4
3
2
1
DECOUPLING
VCC
OUT 1
BOOT 1
GND
GND
GND
GND
FEEDBACK
IN1 (+)
GND (SUB
)
BRIDGE
OUT 2
BOOT 2
GND
GND
GND
GND
FEEDBACK
IN2 (+)
SVR
