Sony SPP-A941 - Cordless Telephone With Answering... Quick start guide

MICROFILM
SERVICE MANUAL
CORDLESS TELEPHONE
WITH ANSWERING SYSTEM
US Model
Canadian Model
SPECIFICATIONS
SPP-A941
Ver 1.1 1999. 11

SPP-A941
– 25 – – 26 –
5-6. SCHEMATIC DIAGRAM – BASE RF Board – • See page 43 for IC Block Diagrams.
(Page 30)

SPP-A941
– 29 – – 30 –
5-8. SCHEMATIC DIAGRAM – BASE MAIN Board – • See page 31 for Waveform. •See page 43 for IC Block Diagrams.
(Page 26)
(Page 33)
(Page 33)
(Page 36)

SPP-A941
– 33 – – 34 –
5-10. SCHEMATIC DIAGRAM – BASE I-TAD Board – • See page 31 forWaveform.
(Page 30)
(Page 30)

SPP-A941
– 35 – – 36 –
5-12. SCHEMATIC DIAGRAM – BASE KEY Board –
5-11. PRINTED WIRING BOARD – BASE KEY Board –
• Semiconductor
Location
Ref. No. Location
LD1 C-6
LD2 H-5
LD3 G-5
LD4 F-5
LED1 I-2
LED2 H-2
U1 C-4
(Page 28)
(Page 30)
BLK
RED SP1
LD2
KP10
LED2
LED1
KP20
KP11
LD3
LD4
KP12
KP42 KP41
KP30 KP31
LD1
KP2
KP1
U1
(MESSAGE COUNTER)
1
27
BASE KEY BOARD
KP0
REC/MEMO
ERASE
TIME/SET
SLOW
REPEAT
CHARGE
IN USE
KP10, LD2
MAIL BOX
1
KP11, LD3
2
KP12, LD4
3
SELECT
KP40
MENU
– +
VOLUME
KP2, LD1
ANSWER
ON/OFF
18
16 9
D
1-676-810-
11
KP22
QUICK
SKIP
KP16
HANDSET
LOCATOR
BASE MAIN
BOARD
J3
05
A
B
C
D
E
F
G
H
I
J
1 2 3 4 5 6

SPP-A941
– 39 – – 40 –
5-14. SCHEMATIC DIAGRAM – HAND RF Board – • See page 43 for IC Block Diagrams.
(Page 42)

SPP-A941
– 41 – – 42 –
5-15. SCHEMATIC DIAGRAM – HAND MAIN Board – • See page 31 forWaveform. •See page 44 for IC Block Diagrams.
(Page 40)

– 43 – – 44 –
• IC Block Diagrams
U1 U2765B-AFSG3 (BASE RF Board)
U1 U2765B-AFSG3 (HAND RF Board)
U3 TB31202BFN-EL (HAND RF Board)
U10 TB31202BFN-EL (BASE RF Board)
U3 CAT93C46KI (BASE MAIN Board)
VCC/2
COMPARATOR SLICER
LOCAL OSC
BUFFER
VCC2 LO REF LO IN GND2 NC VCC3 LIM1 OUT GND3 LIM2 IN LIM2 REF GND4 DEM NTANK DEM TANK DEM OUT
NC
A1 REF
A1 IN
GND1
MIX OUT
VCC1
MIX NOUT
LIM1 REF
LIM1 IN
RSSI
DATA OUT
COM NIN
COM IN
SL IN
1 2 3 4 5 6 7 8 910 11 12 13 14
28 27 26 25 24 23 22 21 20 19 18 17 16 15
A1
MIX
LIMITER
AMP
LIMITER
AMP
DE-
MODULATOR
RSSI
+
–
+
–
235
4 6 78
9
10
1
11
12
13
14
15
16
BUF
BUF PROGRAMABLE
DIVIDER
PHASE
COMPARATOR
OUTPUT
SWITCH
L. OSC
REFERENCE
DIVIDER
LOCK
DET
CONTROL
CIRCUIT
1/2
1/2
1/2
BUF
1
––––––––
32, 33
1
––––––––
32, 33
PHASE
COMPARATOR
OUTPUT
PROGRAMABLE
DIVIDER
FIN1
VCC
CP1
GND
LD CK
DATA
STB
FIN2 VCC CP2 GND SW XIN XOUT BO
U4 TA31103F (BASE MAIN Board)
U7 TA31103F (HAND MAIN Board)
U10 MC74HC595AF (BASE MAIN Board) U11 LP2953IM (HAND MAIN Board)
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
+
–
+
–
59
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
THROUGH
IN 2
AMP
FILTER
AMP 1
FILTER
AMP 2
+
–
VREF
RO2
AMP
+
–
12 3 45 6 7 8
91016 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
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
8 7 6 5
MEMORY ARRAY
128X8 bit/
64X16 bit
HIGH VOLTAGE
GENERATOR
ADDRESS
DECODER
DATA REGISTER
DECODE & CONTROL
LOGIC
CLOCK GENERATOR
21 3 4
BUFFER
VCC NC ORG GND
CS SK
DI
DO
U6 KA8602D (BASE MAIN Board)
+–
2
3
4
BIAS
CIRCUIT
+–
1
8
7
6
5
AMP1 AMP2
IN+
IN–
OUT1
VCC GND
OUT2
MUTE
RIPPLE
REJECTION