Sony SPP-M937 Service Manual page 29

IC BLOCK DIAGRAMS
r
U6 TA31103F (BASE MAIN SECTION)
U7 TA31103F (HAND MAIN SECTION)
24 23 22 21
∆G
–
+
PRE AMP
VREF
FILTER
FILTER
AMP 1
AMP 2
+ +
– –
1 2 3 4
U11 KS58015DTF (BASE MAIN BOARD)
VDD 1
2
TEN
CONTROL
3
ST
CIRCUIT
GS 4
VSS 5
OSC IN 6
OSC
CIRCUIT
OSC OUT 7
MUTE
LOGIC
20 19
EXP
SUM
MUTE
AMP
VREF
–
+
THROUG
VREF
THROUG
COMP
MUTE
VREF
IN 2
AMP
+
–
∆G
5 7
6
D/A CONVERTER
14 TONE OUT
& MIXING
13 NC
12 D3
ROW &
DATA
11 D2
COLUMN
LATCH &
TONE
D1
10
DECODER
COUNTER
D0
9
MUTE
8 MUTE
DRIVER
17 16 15 14 13
18
–
–
+
+
RO1 SWITCH
AMP RO2 CONTROL
AMP
VREF
VREF
SUM
AMP
MIC AMP
+
+
–
–
8 9 10 11 12
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