Block Diagram - Handset Section - Sony SPP-935 Service Manual

SPP-935
5-2. BLOCK DIAGRAM – HANDSET Section –
ANT2
F3
F1
RF AMP
SAW RF AMP MIX
B.P.F.
Q2 Q4
FILTER Q7
RX VCO
Q9, 10
14
PLL
CP2
U2 PLL CLK
CK 6
PLL DATA
DATA 7
PLL EN
STB 8
XIN 11
CP1
OSCILLATOR
3
Q12
OSC2
F2
TX AMP TX VCO
B.P.F.
Q1 Q8, 11
Q13
B+
KEY MATRIX
SW1-17, 19-21
4MHz
D4
BATT LOW
D5
• SIGNAL PATH
TALK
: TX
: RX
D9
: BELL
INTERCOM
05
IF AMP, LIMITER AMP, MIX
U1
LIMITER
IF AMP
AMP
F4
F5
IF AMP
IF AMP
3 7 9
Q6 Q5
IF IF
LIM
IN OUT
IN
20
DS-OUT
COMPRESSOR, NOISE GATE
U7 (2/2)
FILTER
AMP
BUFFER
3 4 5
U5 (3/3)
FIL1 COMP
FIL1
OUT OUT
IN
8 33
9-13
34 RX DATA
PLL DATA
30 PLL DATA
PLL CLK
31 PLL CLK
PLL EN
19 PLL EN
OSC2
36
OSC2
X1
37 OSC1
SYSTEM CONTROLLER
U3
4
ı COL0-3
7
26 BATT LOW LED
25 IN USE LED
24 INT COM LED
– 21 –
EXPANDER, NIOSE GATE
U7 (1/2)
FILTER
AMP
DMOD
BUFFER
PRE/SUM
16 2 1 23
U5 (1/3)
AMP
PRE
FIL2
FIL2
IN
OUT
IN
EXP MUTE
15
15
C87
QUAD
QUAD-TUNE
VOLTAGE
BIAS
+
LOW-PASS
–
17 FILTER
DAT-IN
U5 (2/3)
IN2
MIC
MIC
AMP
AMP
NF
10
U9
COMP
MUTE
VCC
24 16
Q18 B+
21 15
IRQ/ROW0
42
RX MUTE 23
RX ENABLE 1
BUZZER DRIVE
18
RINGER
Q14, 17
RESET SIGNAL GENERATOR,
BATTERY DETECT
B+ 3
41 6
RESET
2 10
LO BAT
20
ATE IO
CRADLE DETECT
14
CRADLE DET
Q15
20
U8
EXP
OUT
LOW S1
VOL
MID
HIGH
B+
Q16
B+
(FOR RX SYSTEM)
Q19
SWITCHING COMPARATOR
Q20 U6
U4
U11
O/P 15
INPUT
RECHARGEABLE
BATTERY PACK
BP-T23
ERROR
COMP OUT
ATE
CHARGE
+ TERMINAL
–
– 22 –