Sharp SD-EX101 Service Manual - Page 26
Ica106/107, Sla5505m, Switching Audio, Power Amp. - audio system
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SD-EX100 SD-EX101 AMP. SECTION ANALOG SIGNAL INPUT NF ICA106/107 SLA5505M SWITCHING AUDIO POWER AMP. DEAD TIME CONTROL ICA110 TC74AC8T QUAD 2 INPUT AND GATE POWER - REF GND LEVEL SHIFT L-OUT L-IN H-OUT H-IN B. S +5V L-OUT L-IN H-OUT H-IN B. S OUT- OUT+ RESET NF- NF+ SLICE LEVEL SET VOLTAGE +5V OUTPUT OFFSET ADJUSTMENT ICA100 IX0498AW 7TH ORDER ∆∑ MODULATION CONVERSION LSI +B IN +POWER +POWER - POWER - POWER QA101 LOW PASS FILTER LOAD QA102 RL460 JK400 SPEAKER TERMINAL Q465 Q460~ Q463 SP_RLY OFFSET Figure 26 BLOCK DIAGRAM (2/5) - 26 - +12V_M ICD02 SYSTEM MICROCOMPUTER
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SD-EX100
SD-EX101
– 26 –
Figure 26 BLOCK DIAGRAM (2/5)
IN
NF–
OUT–
OUT+
QA102
QA101
RESET
NF+
ICA100
IX0498AW
7TH ORDER
∆∑
MODULATION
CONVERSION LSI
OUTPUT OFFSET
ADJUSTMENT
ANALOG SIGNAL
INPUT
AMP. SECTION
– POWER
– POWER
+POWER
+POWER
LOAD
+5V
GND
REF
POWER –
LEVEL SHIFT
LOW PASS
FILTER
NF
L-IN
L-OUT
H-OUT
H-IN
L-IN
L-OUT
H-OUT
H-IN
B. S
B. S
+5V
+B
DEAD TIME
CONTROL
ICA110
TC74AC8T
QUAD 2 INPUT
AND GATE
SLICE LEVEL
SET VOLTAGE
ICA106/107
SLA5505M
SWITCHING AUDIO
POWER AMP.
ICD02
SYSTEM
MICROCOMPUTER
Q465
RL460
+12V_M
SP_RLY
OFFSET
JK400
SPEAKER
TERMINAL
Q460~
Q463