Technics ST-G470 Service Manual

5 6 7 8 9 10 11
IAGRAM
arts
list
on
pages
19~21)
POWER
SWITCH
BI
PC.B.
SYSTEM
CONTROL
PC.B.
(S701)
[POWER |
E OPERATION SWITCH PC.B.
007
ay) ( -MEMORY / ) (UP) (DOWN) (ON/OFF) Cane? )
—AUTO MEMORY | MONO
! PRESET CHANNEL
EM- EM-
SIGNAL MODE
FM mono distortion adj.
-AM/ ) “FM / )
(—aLLocaTion —FREQ SHIFT
BAND SELECTOR
i,
0!
le @l~
nN
D302
@BIX/c
q oo
(L ch) (R ch)
a AM [am ant] [FM ANT |
OUTPUT LOOP ANT AM ANT FM ANT
—14~—
m@ FUNCTIONS OF IC TERMINALS
(IC902: M50941-421SP)
PIN NO. | IN/OUT
MARK
DESCRIPTION OF TERMINAL
ane | iNPUT VREF Reference voltage terminal.
Not used in this unit, connected to GND.
SSL1
SSL2
7 INPUT SSL3 FM signal level detector terminal.
8 INPUT
9 INPUT | STEREO
10 TUNING O
17 TUNING 1
12 OUTPUT | IF BAND
Station detection of auto tuning terminal.
° Received: ‘‘H’’, No signal: “L”
Reference voltage terminal.
Not used in this unit.
11 —— |RF BAND Not used in this unit.
FM IF BAND selector terminal.
¢“normal”’: “‘L”’, ‘super narrow”: “H”
13 NC Not used in this unit.
14 —_— REC Not used in this unit.
Forcible monaural selection terminal. way
15 OUTPUT | MONO | .
Forcible monaural mode
Terminal to eliminate shock noise due to unlocking at PLL.
<Muting output>
«Pin 25 (CE) is “L"+"H" or “H"—="L”
16 OUTPUT MUTE * Power switch “off”.
Frequency change. (up/down, FM--AM (MW/LW), REC).
°FM RF/IF selection.
18 SRDY PLL data output terminal.
| SRDY: serial 1/O enable signal, CLK: clock signal,
3 | euEnuy ans SOUT: serial data signal.
20 SOUT
21 INPUT SIN Control input terminal.
Clock pulse waveform output terminal.
22 OUTPUT T1 °FM: 1kHz signal (duty 50%)
23 — T2 Not used in this unit.
24 INPUT inti Remote control input terminal. Not used in this unit.
25 INPUT Inve Power supply detection terminal.
eral ised oe
26 Ground terminal.
* -_ Vss
32
27 INPUT RESET Reset signal terminal.
28 INPUT XIN Connecting terminal for crystal oscillator.
29 OUTPUT XOUT
30 _—— XCIN Not used in this unit, connected to GND.
31 —- XCOUT Not used in this unit.
33 —- NC
Terminal for key return signal
34 RO to external key matrix. 36V
5 INPUT s | | |
37 R3 0 1V/2msec. div
38 INPUT vp Power supply terminal for FL display.
Segment signal terminal for ay
39 FL display. = woos roy
5 OUTPUT =
54 S15 —26.0V
10V/Smsec. div.
55 a NC Not used in this unit.
Terminal for key scan signal ay
56 1 to external key matrix and -f}----- bas
grid signal terminal for FL display.
Toviamses div. OY
Power supply terminal of device.
64 INPUT Vec

Technics ST-G470 Specifications

General

Brand	Technics
Model	ST-G470
Category	Tuner
Language	English