SPP-S9101
25
25
SECTION 6
DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
C
: panel designation.
•
2
: nonflammable.
•
U
: B+ Line.
• Power voltage is dc 9V and fed with regulated dc power
supply from external power voltage jack (J301 on the
BASE MAIN board).
• Power voltage is dc 12V and fed with regulated dc power
supply from modular jack (MJ101 on the BASE MAIN
board) with 100
Ω
in series.
• Power voltage is dc 3.6V and fed with regulated dc power
supply from battery jack (HAND MAIN board).
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : Talk
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
N
: RX
O
: TX
P
: bell
Note on Printed Wiring Boards:
Note:
•
X
: parts extracted from the component side.
•
b
: Pattern from the side which enables seeing.
1
WAVEFORMS
– BASE UNIT SECTION –
IC501
5
OSCI
4 Vp-p
9.6 MHz
1
– HANDSET SECTION –
IC401
5
OSCI
4 Vp-p
9.6 MHz
Note:
The components identi-
fied by mark
!
or dotted
line with mark
!
are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
!
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce portant le numéro
spécifié.
6-1. IC BLOCK DIAGRAMS
• BASE MAIN Board
IC502 S-24C01AFJA-TB-01
LOGIC
DOUT/ACK
ADDRESS/COUNTER
DATA WORD
Y DEC
SERIAL MUX
EEPROM
DATA REGISTER
X DEC
H. V. PUMP/TIMING
LOGIC
CONTROL
SERIAL
R/W
INC
LOAD
EN
LOGIC
STOP
START
3
6
2
5
1
7
8
4
DIN
DOUT
VCC
TEST
SCL
SDA
NC
NC
NC
GND
CONTROL BIT
DECODE
MUX
BIAS
GENERATOR
2130Hz
BAND PASS
ANTI-ALIAS
FILTER
FSK
BANDPASS
FSK
DEMODULATOR
2750Hz
BAND PASS
CARRIER
DETECTOR
GUARD TIME
DATA
TIMING
RECOVERY
TONE
DETECTION
ALGORITHM
OSCILLATOR
1
V REF
2
IN 1+
3
IN 1–
4
GS 1
PWDN
PWDN
MODE
PWDN
5
VSS
6
OSC 1
7
OSC 2
8
CB 0
9
DCLK
10
20
19
18
17
16
15
14
13
12
11
DATA
IN 2+
PWDN
PWDN
FSKEN+TIP/RING
CASEN
IN 2–
GS 2
CB 2
CB 1
VDD
CD
ST/GT
EST
DR/STD
STD
DR
CASEN
HYBRID CASEN
FSKEN
CASEN
CASEN
• BASE MAIN Board
IC901 MT88E45
• HAND MAIN Board
IC402 AT24C32N-10SI-1.8-TR
• HAND MAIN Board
IC403 TC74VHC86FT (EL)
START/
STOP
LOGIC
DATA WORD
ADDRESS/
COUNTER
X
DECODER
DEVICE
ADDRESS
COMPARATOR
LOAD
COMP
SERIAL
CONTROL
LOGIC
DATA
RECOVERY
H.V.
PUMP/
TIMING
D OUT/
ACK
LOGIC
Y
DECODER
EEPROM
SERIAL
MUX
1
2
3
4
5
6
7
8
D OUT
D IN
R/W
LOAD
INC
EN
A0
A1
A2
VSS
VCC
WP
SCL
SDA
1
1A
2
1B
3
1Y
4
2A
5
2B
6
2Y
7
GND
14 VCC
13 4B
12 4A
11 4Y
10 3B
9
3A
8
3Y
