Download  Print this page

Sony A941 - SPP Cordless Phone Service Schematics Page 8

Cordless telephone with answering system.
Hide thumbs
   

Advertisement

• IC Block Diagrams
U1
U2765B-AFSG3 (BASE RF Board)
U1
U2765B-AFSG3 (HAND RF Board)
28
27 26
25 24 23
22
21 20 19 18
17 16
LOCAL OSC
BUFFER
LIMITER
DE-
AMP
MODULATOR
MIX
LIMITER
RSSI
COMPARATOR
AMP
+
A1
1
2
3
4 5 6 7
8
9
10
11
12
U3
TB31202BFN-EL (HAND RF Board)
U10
TB31202BFN-EL (BASE RF Board)
15
14
11
16
13
12
SWITCH
L. OSC
PHASE
1/2
COMPARATOR
OUTPUT
1/2
1
PROGRAMABLE
BUF
––––––––
32, 33
DIVIDER
REFERENCE
DIVIDER
1
PROGRAMABLE
BUF
––––––––
DIVIDER
32, 33
PHASE
1/2
LOCK
COMPARATOR
DET
OUTPUT
2
3
1
4
5
6
U3
CAT93C46KI (BASE MAIN Board)
8
7
6
5
HIGH VOLTAGE
MEMORY ARRAY
GENERATOR
128X8 bit/
64X16 bit
ADDRESS
DECODER
DATA REGISTER
BUFFER
DECODE & CONTROL
LOGIC
CLOCK GENERATOR
1
2
3
4
15
VCC/2
SLICER
+
13
14
10
9
BUF
CONTROL
CIRCUIT
7
8
U6
KA8602D (BASE MAIN Board)
RIPPLE
8
BIAS
REJECTION
CIRCUIT
7
MUTE
IN+
1
IN–
2
+
+
AMP1
AMP2
OUT1
3
6
OUT2
VCC
4
5
GND
– 43 –
U4
TA31103F (BASE MAIN Board)
U7
TA31103F (HAND MAIN Board)
24
23
22
21
20
19
G
+
EXP
SUM
MUTE
PRE AMP
AMP
VREF
VREF
+
THROUGH
VREF
THROUG
COMP
MUTE
VREF
FILTER
FILTER
IN 2
AMP 2
AMP 1
AMP
+
+
+
G
1
2
3
4
5
6
7
U10
MC74HC595AF (BASE MAIN Board)
16
15
14
13
12
11
10
9
VCC
SHIFT REGISTER
LATCH
GND
1
2
3
4
5
6
7
8
PARALLEL DATA
OUTPUT
18
17
16
15 14 13
+
+
RO1
SWITCH
AMP
RO2
CONTROL
AMP
VREF
SUM
VREF
AMP
MIC AMP
+
+
8
9
10 11 12
U11
LP2953IM (HAND MAIN Board)
GND
1
16 GND
2
NC
OUTPUT
3
15
ERROR
AMP
14
+
SENSE
4
13
SHUT DOWN
5
+
SHUT DOWN
COMPARATOR
DROP OUT
DETECTION AMP
+
ERROR
6
NC
7
GND
8
12
1.23V
+
AUXILLARY
COMPARATOR
11
10
9
– 44 –
INPUT
FEEDBACK
5V TAP
VREF
COMP IN
COMP OUT
GND

Advertisement

Table of Contents

   Related Manuals for Sony A941 - SPP Cordless Phone

This manual is also suitable for:

Spp-a941

Comments to this Manuals

Symbols: 0
Latest comments: