Sony DHC-EX880MD / DHC-MD717 / ST-EX880 / ST-MS717 Service Manual ▷ View online
ST-EX880/MS717
– 19 –
– 20 –
5-7.
SCHEMATIC DIAGRAM – PANEL Section –
•
See page 8 for Waveforms.
(Page 16)
ST-EX880/MS717
– 21 –
– 22 –
5-8.
SCHEMATIC DIAGRAM – RDS Section – (ST-EX880)
5-9.
PRINTED WIRING BOARD – RDS Section – (ST-EX880)
•
See page 7 for Circuit Boards Location.
5-10.
SCHEMATIC DIAGRAM – POWER Section –
The components identified by mark
!
or dotted
line with mark
!
are critical for safety.
Replace only with part number specified.
(Page 15)
(Page 9)
(Page 15)
ST-EX880/MS717
– 23 –
– 24 –
5-11.
PRINTED WIRING BOARDS – POWER Section –
•
See page 7 for Circuit Boards Location.
(Page 10, 12)
ST-EX880/MS717
– 25 –
– 26 –
5-12.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC201
µ
PD78016FGC-544-AB8 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Function
1 to 4
DATA 0 to
DATA 3
I/O
Two-way data bus with the system control bus
5
IF+50
I
Fixed at “L” in this set
6
IF–50
O
Fixed at “L” in this set
7, 8
GND
—
Ground terminal
9
VSS
—
Ground terminal
10
POWER
O
Power on/off control signal output for the +10V and +5V power supply
“L”: power on, “H”: standby
“L”: power on, “H”: standby
11
MUTE
O
Tuner muting on/off control signal output terminal “L”: muting on
12
AC RELAY
O
Relay drive signal output for the AC on/off control “L”: standby, “H”: power on
13, 14
NC
O
Not used (open)
15
AM MONO
O
AM forced monaural control signal output terminal “H”: forced monaural Not used (open)
16
AM/FM
O
FM/AM selection signal output terminal Not used (open)
17
IFNG
O
Intermediate frequency count effect signal output terminal “L”: NG, “H”: OK
Not used (open)
Not used (open)
18
STEREO
I
Stereo detection signal input from the LA1835 (IC1) “L”: stereo
19
SIGNAL
I
FM/AM frequency detection signal input from the LA1835 (IC1) “L”: tuned, “H”: detuned
20
DATA IN
I
PLL serial data input from the FM/AM PLL (IC51)
21
DATA OUT
O
PLL serial data output to the FM/AM PLL (IC51)
22
CLOCK
O
PLL serial data transfer clock signal output to the FM/AM PLL (IC51)
23
CE
O
PLL serial chip enable signal output to the FM/AM PLL (IC51)
24
VSS
—
Ground terminal
25
SIRCS IN
I
Sircs remote control signal input from the remote control receiver (IC902)
26
STAND BY
O
LED drive signal output for the STANDBY indicator Not used (open)
27
ONCE
O
LED drive signal output for the ONCE indicator (D905) “L”: LED on
28
DAILY
O
LED drive signal output for the DAILY indicator (D904) “L”: LED on
29
REC
O
LED drive signal output for the REC indicator (D903) “L”: LED on
30
SLEEP
O
LED drive signal output for the SLEEP indicator (D902) “L”: LED on
31
ENCORDER IN A
I
Jog dial pulse (A) input from the rotary encoder (S915) (for MULTI CONTROLLER)
32
ENCORDER IN B
I
Jog dial pulse (B) input from the rotary encoder (S915) (for MULTI CONTROLLER)
33
AUBUS IN
I
Sircs remote control signal input for the audio bus
34
AUBUS OUT
O
Sircs remote control signal output for the audio bus
35
RESET
I
System reset signal input from the reset signal generator circuit “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
36
RDS CLK
I
Serial data transfer clock signal input from the RDS decoder (IC302)
Used for the ST-EX880 (ST-MS717: fixed at “L”)
Used for the ST-EX880 (ST-MS717: fixed at “L”)
37
CLOCK
I/O
Bus data transfer/reading clock signal in/out terminal for the system control bus
38
BUSY
I/O
Busy signal in/out terminal for the system control bus
39
AC OFF
I
AC off detection signal input terminal “L”: AC off
40
VDD
—
Power supply terminal (+5V)
41
X2
O
Main system clock output terminal (10 MHz)
42
X1
I
Main system clock input terminal (10 MHz)
43
GND IC (VPP)
—
Ground terminal
44
XT2
O
Sub system clock output terminal (32.768 kHz)
45
XT1
I
Sub system clock input terminal (32.768 kHz)
46
AVSS
—
Ground terminal (for A/D converter)
Pin No.
Pin Name
I/O
Function
47
KEY IN 1
I
Key input terminal (A/D input) (S907 to S913)
ONCE, DAILY, REC, SLEEP, CLOCK/TIMER SET, ENTER/YES, MENU/NO keys input
ONCE, DAILY, REC, SLEEP, CLOCK/TIMER SET, ENTER/YES, MENU/NO keys input
48
KEY IN 2
I
Key input terminal (A/D input) (S901 to S906)
STEREO/MONO, BAND, PRESET, MANUAL, AUTO, DISPLAY keys input
STEREO/MONO, BAND, PRESET, MANUAL, AUTO, DISPLAY keys input
49
KEY IN 3
I
Key input terminal (A/D input) (S914) I/
u (power) key input
50
RDS DATA
I
Serial data input from the RDS decoder (IC302)
Used for the ST-EX880 (ST-MS717: fixed at “L”)
Used for the ST-EX880 (ST-MS717: fixed at “L”)
51
DESTINATION
I
Input terminal for the destination setting
(Tourist model: fixed at “L”, Except Tourist model: open)
(Tourist model: fixed at “L”, Except Tourist model: open)
52
DESTINATION
I
Input terminal for the destination setting (fixed at “L”)
53
DESTINATION
I
Input terminal for the destination setting
(Tourist model: open, Except Tourist model: fixed at “L”)
(Tourist model: open, Except Tourist model: fixed at “L”)
54
DESTINATION
I
Input terminal for the destination setting (ST-EX880: open, ST-MS717: fixed at “L”)
55
AVDD
—
Power supply terminal (+5V) (for A/D converter)
56
AVREF
I
Reference voltage (+5V) input terminal (for A/D converter)
57
GND
—
Ground terminal
58
SDATA
O
Serial data output to the fluorescent indicator tube driver (IC901)
59
SCK
O
Serial data transfer clock signal output to the fluorescent indicator tube driver (IC901)
60
CS
O
Chip select signal output to the fluorescent indicator tube driver (IC901) “L” active
61
RESET
O
Reset signal output to the fluorescent indicator tube driver (IC901) “L”: reset
62
ERRORS
O
Output terminal of the error monitor Not used (open)
63
CORRECTION
O
Output terminal of the correction monitor Not used (open)
64
RECEIVED
O
Output terminal of the receive monitor Not used (open)
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