Sony ST-SE570, Руководство по обслуживанию

Страница: 14 / 24

ST-SE570
14 14
3 6
11
2 5 8 1 4
14 15 12 9 10 16 13
7
FM IF AMP
LIMITER
AF/NULL
METER
QUADRATURE
DET
AF AMP
IF OFF
NULL METER
SHORTING
LEVEL
DET
METER
DRIVE
MUTING
CIRCUIT
DETUNE
DET
GND
B+
1 2 3 4
REG
GND
CONTROL
REG
5 6 7
IC901 LA5667
ANALOG
DIGIT
AL
RCLK NC XO XI
VSS2
T2
VDD2
T1
QUAL RDA
T
VREF
MUX
VDD1 VSS1 VSS3
CMP
1 4 3 6 5 8 7 2
14 15 16 13 12 11 10 9
CLOCK
PLL 57kHz
RDS/ARI
COMPARATOR
8th SWITCHED
CAPACITOR
FILTER
ANTI-ALIASING
FILTER
BIPHASE
DECODER
PLL
1187.5Hz
DEFFERENTIAL
DECODER
TEST
IC801 BU1924
• IC Block Diagrams
– MAIN Board –
IC201 LA1235
5-6. IC PIN FUNCTION DESCRIPTION
•
DISPLAY BOARD IC701 (
µ
PD780205GF-040-3BA)
Pin No. Pin Name I/O Description
1 VDD — Power supply terminal (+5V)
2 ANT —
Not used (open)
3 ANT —
Not used (open)
4 BAND1 — Not used (open)
5 BAND2 — Not used (open)
6 IF-B — Not used (open)
7 N.C. — Not used (open)
8 MONO —
Not used (open)
9 TUN —
Not used (open)
10 RESET I System reset signal input terminal “L”: reset
11 X2 O Main system clock output terminal (4.19MHz)
12 4.19MHz I Main system clock input terminal (4.19MHz)
13 GND —
Ground terminal
14 N.C. —
Not used (open)
15 LOCK I Lock signal input terminal
16 VDD — Power supply terminal (+5V)
17 CLK O Serial data transfer clock signal output to the PLL IC on tuner pack (TB101) “L”: active
18 DATA O
Serial data output to the PLL IC on tuner pack (TB101)
19 D-IN I
Serial data input from the PLL IC on tuner pack (TB101)
20 CE O Serial chip enable signal output to the PLL IC on tuner pack (TB101)
21 BLN — Not used (open)
22 ST I Stereo detection signal input from the tuner pack (TB101)
23 CAL —
Not used (open)
24 AST I
Tuned display detection signal input from the tuner pack (TB101) “L”: tuned
25 AVSS — Ground terminal
26 MUTE O Muting on/off control signal output terminal
27 EON O EON output control terminal
28 PGM —
Not used (open)
29 DATA RDS I
RDS data input from the RDS decoder (IC801)
30 R2 O Rotary encoder phase detection
31 KEY2 I Key input terminal (A/D input)
32 KEY1 I Key input terminal (A/D input)
33 SI I
Signal input terminal
34 AVDD —
Analog power supply terminal (+5V)
35 AVREF I Reference voltage (+5V) input terminal
36 RIN I Remote control signal input from the remote sensor (IC702)
37 R1 I Rotary encoder number of rotation detection
38 RDS CLK I
RDS serial clock signal input from the RDS decoder (IC801)
39 POWER I
Power supply ON/OFF monitor
40 GND — Ground terminal