Diagrams; Block Diagram - Base Unit Section - Sony SPP-935 Service Manual

5-1. BLOCK DIAGRAM – BASE UNIT Section –
ANT1
F3
F2
RF AMP SAW RF AMP MIX
B.P.F.
Q2 FILTER Q4 Q7
RX VCO
Q9, 10
14
PLL
CP2
U2 PLL CLK
CK 6
PLL DATA
DATA 7
PLL EN
STB 8
XIN 11
CP1
3
PLL REFERENCE
SWTCH
Q14
PLL REF
F1
TX AMP TX VCO
B.P.F.
Q1 Q8, 11
Q13
B+
KEY MATRIX
SW1-19, 21, 22
D3
SHIFT REGISTOR & LATCH
INTERCOM
U15
5 Q5
D4
Q6
6
SPEAKERPHONE
7 Q7
1 Q1
RCLK
4 Q4 SCLK
D5
15 Q0 SER
CHANGE
SHIFT REGISTOR & LATCH
U16
4 Q4 SER
5 Q5 SCLK
6 Q6
RCLK
7 Q7
15 Q0
1
S1 Q1
RINGER LEVEL
OFF LOW HIGH
DTMF TONE GENERATOR
U17
TONE OUT
9 D0
10 D1 OSC OUT
11
D2
12 D3
OSC IN
TEN
05
SECTION 5

DIAGRAMS

IF AMP, LIMITER AMP, MIX
U1
LIMITER
IF AMP
AMP
F4 F5
IF AMP IF AMP
5 8 10
Q6 Q27
IF
IF
LIM
OUT
IN
IN
CAR DET
VOICE SPEAKERPHONE
U12
MIC AMP
U20 ATTENUATOR
11 10 9 8 7
MCO
TXI TXO
MCI
MUT
12
SP1
ATTENUATOR
SPEAKER AMP
22
U14
RXO
13
VLC
SPK MUTE
MIC MUTE
GAIN CONTROL
Q25
COMPRESSOR, NOISE GATE
FILTER
AMP
BUFFER
3 4 5
U5 (3/3)
FIL1 COMP
FIL1
OUT OUT
IN
EEPROM 33
SPK MUTE
U4
13
MIC MUTE
14
19
12
1 2 3 4 42
11
8
ı
14
12
29
2
PLL DATA
30
14
PLL CLK
31
11
PLL EN
44
12
PLL REF
36
X1
4MHz
37
3
4
1
5
14
7 S2
X2
DIAL MODE
3.58MHz
6 TONE PULSE
2
27
– 19 –
EXPANDER, NIOSE GATE
U6 (1/2)
FILTER
AMP
DMOD
BUFFER PRE/SUM
14 2 1 23
U5 (2/3) AMP
PRE
FIL2
FIL2
IN
OUT
IN
EXP MUTE
13 C151 15
OD CL
QUAD-TUNE
VOLTAGE
LOW-PASS
21
FILTER
U5 (1/3)
HYBRID
AMP
5
HT+
HTI
U13 (1/3)
AF AMP
21
U18 (2/3)
RXI
U6 (2/2)
IN2
MIC
MIC
AMP
AMP
NF
10
COMP
MUTE
IN2
6 16
25 18 24 7 34 26
TX DATA
SPK MUTE
MIC MUTE
TX ENABLE
POW0-5
DO
EEPROM CS
SYSTEM CONTROLLER
PLL DATA U3
PLL CLK
PLL EN
OSC2
CRADLE DET 6
OSC1
LATCH1
LATCH2
41
RESET
DTMF EN
RINGER SW
HS ON 20
TONE/PLUSE
B+
U13 (2/3)
AF AMP BUFFER
20
U18 (1/3) Q17
EXP
OUT
U13 (3/3)
AF AMP
U18 (3/3)
23
OFF HOOK DETECT
OFF HOOK 21
U7
TELEPHONE LINE
LINE DROP
35 DETECT
U11, Q20-22
RINGER DETECT
RING DET 28
U8
15
ATE IO
CHARGE ON
CRADLE DETECT
SWITCH
Q18, 23
Q15, 16, 24, 26
RESET SIGNAL
+5V REGULATOR
GENERATOR
U9
U10
D6
D7 POWER
LED DRIVE
Q12 IN USE
– 20 –
SPP-935
• SIGNAL PATH
: TX (TELEPHONE) : TX (INTERCOM)
: RX (TELEPHONE) : RX (INTERCOM)
: BELL
T1
J7
3
1
LINE
2
4
ATE
CHARGE
+
TERMINAL
–
J8
DC IN 9V
– +