Sony SPP-935 - 900 Mhz Cordless Phone, Service Manual

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U6 TA31103F (BASE MAIN BOARD)
U7 TA31103F (HAND MAIN BOARD)
– 41 –
– 42 –
2 1
E-RECT PRE OUT PRE NF VCC VREF THROUG RO2 RIN EXP OUT RO1 COMP MUTE EXP MUTE
4
FIL1 OUT
3
FIL2 IN
FIL2 OUT
+
–
+
–
5 9 8 7
6
IN2
C-RECT
C-NF
FIL1 IN
COMP OUT
10 11 12
24 20 21 22 23 19 17
18
15 14 13 16
GND
MIC IN
MIC OUT
MIC NF
∆
G
VREF
+
–
VREF
VREF
SWITCH
CONTROL
+
– +
–
MIC AMP
SUM
AMP
+
–
+
–
∆
G
VREF
VREF PRE AMP
SUM
AMP
RO1
AMP
COMP
MUTE
EXP
MUTE
THROUG
THROUG
IN 2
AMP
FILTER
AMP 1
FILTER
AMP 2
+
–
VREF
RO2
AMP
+
–
U11 LP2953IM (HAND MAIN BOARD)
2
3
1
8
9
10
11
12
13
14
15
7
5
6
4
SHUT DOWN
ERROR
NC
GND
NC
OUTPUT
SENSE
GND
VREF
COMP IN
COMP OUT
GND
INPUT
FEEDBACK
5V TAP
+
–
+
–
+
–
+
–
ERROR
AMP
SHUT DOWN
COMPARATOR
DROP OUT
DETECTION AMP
AUXILLARY
COMPARATOR
1.23V
16 GND
U12 MC34118DW (BASE MAIN BOARD)
2
1
RLO1 TLO1 TLI1 RLI1 CPR GND RXO RXI RLI2 RLO2 TLO2 TLI2 CPT VB
FI
4
VCC
3
CD FO
+
–
+
–
5 9
8 7 6
HTI
TXO
TXI
HTO+ HTO–
10 12
11
14 13
27 28 25 26 24 20 21 22 23 19 17 18 15 16
MUT MCO
MCI
CT
VLC
VR
VCC
HYBRID
AMP 2
HYBRID
AMP 1
MIC
AMP
VREF
+
–
VR
FILTER
AMP
COMPARATOR
AGC
BACKGROUND
NOISE
DETECTOR
VR
LEVEL
DETECTOR
LEVEL
DETECTOR
COMPARATOR
ATTENUATOR
CONTROL BLOCK
BACKGROUND
NOISE
DETECTOR
DIAL
TONE
DETECTOR
LEVEL
DETECTOR
LEVEL
DETECTOR
RX
ATTEN-
UATOR
TX
ATTENUATOR
U14 MC34119DR2 (BASE MAIN BOARD) U15, 16 MC74HC595AF (BASE MAIN BOARD)
+
8 7 6 5
4 3 2 1
_
+
_
VO2
CD
CF 2 CF 1
V in
GN
D
Vcc VO1
BIAS
CIRCUIT
1 2 3 4 5 6 7 8
9 10 16 15 14 13 12 11
SHIFT REGISTER
LATCH
PARALLEL DATA
OUTPUT
GND
VCC
LATCH CLOCK PARALLEL DATA OUTPUT SERIAL DATA INPUT OUTPUT ENABLE SHIFT CLOCK SERIAL DATA OUTPUT RESET
QB QC QD QE QF QG QH
SQH
A
QA
U17 KS58015D (BASE MAIN BOARD)
2
3
1
8
9
10
11
12
13
14
7
5
6
4
VSS
OSC IN
OSC OUT
TEN
ST
GS
VDD
D3
D2
D1
D0
MUTE
TONE OUT
NC
DATA
LATCH &
DECODER
ROW &
COLUMN
TONE
COUNTER
CONTROL
CIRCUIT
D/A CONVERTER
& MIXING
OSC
CIRCUIT
MUTE
LOGIC
MUTE
DRIVER