Read Sony D-F21 / D-F22ST / ICD-BP220 Service Manual online
9
D-F21/F22ST
SECTION 5
DIAGRAMS
5-1. IC PIN DESCRIPTIONS
• IC61 TC9327AF-631 (TUNER PLL, LCD DRIVER)
Pin No.
Pin Name
I/O
Pin Description
1 – 4
COM1 – 4
O
LCD driver signal output
5 – 20
S1 – 16
O
LCD driver signal output
21
AM STEP-I
I
AM 9K/10K tuning step select signal input (initialization)
22
DEST2-I
I
Bit2 tuner destination setting signal input (Fixed at “L” in this set)
23
DEST1-I
I
Bit1 tuner destination setting signal input (Fixed at “L” in this set)
24
DEST0-I
I
Bit0 tuner destination setting signal input (Fixed at “L” in this set)
25
XLOCAL/XMONO-DET-I
I
LOCAL/DX or MONO/STEREO ON-OFF switch detect signal input
26, 27
NC
—
Not used. (Open)
28
LCDREQ-I
I
LCD display request signal input
29
LID OPEN
I
CD door open detect signal input
30
EEP D0/D1-IO
I/O
Data signal input/output for EEPROM IC.
31
EEP SK-O
O
Clock signal output for EEPROM IC.
32
EEP CS-O
O
Chip select signal output for EEPROM IC.
33
XL/O-I
I
Line out signal input
34, 35
NC
—
Not used. (Open)
36
MEM-KEY (3-BIT)
I
Memory key signal input (Fixed at “H” in this set)
37
PRESET KEY
I
Not used in this set. (Open)
38
CD ACK-I
O
CD acknowledge signal output
39
CDON-IWP-CDU
I
CD ON request signal input (Wake-up tuner in sleep mode)
40
I/O (RESERVED)
—
Not used. (Open)
41
NC
—
Not used. (Open)
42
AD1 KEY
I
Set keys signal input
43
AD2 RMKEY
I
Remote key signal input (Fixed at “L” in this set)
44
AD3 BATT HIDC
I
Battery/HiDC level detect signal input
45
AD DC REF
I
Reference DC signal input of A/D.
46
SDI-I-CDU
I
Serial data signal input from system control IC.
47
SDO-O-CDU (RESERVED)
O
Serial data signal output to system control IC.
48
SCK-I-CDU
I
Serial clock signal input from system control IC.
49
TUBEEP-O
O
Beep sound control signal output
50
NC (I/O)
—
Not used. (Open)
51
XHOLD-I-SW
I
HOLD detect signal input
52
XAVLS-I-SW
I
AVLS detect signal input
53
XDC IN DET-I
I
DC-in detect signal input
54
TU ON-O
O
Tuner ON request signal output
55
ST OR DX-O-CTR
O
LOCAL/DX or MONO/STEREO ON-OFF control signal output
56
TUBASS2-O
O
MEGA BASS 2 sound mode signal output (Not used in this set)
57
TU TEST MODE
I
Tuner test mode detect signal input
58
TUBASS1-O
O
MEGA BASS 1 sound mode signal output (Not used in this set)
59
AM/XFM-O
O
Band control FM/AM signal output to tuner IC.
60
+B ON/OFF
O
Radio power ON/OFF signal output
61
IFREQ-O
O
IF request signal output
62
TUMUTE-O
O
Mute HP control signal output
63
TEST
—
Not used. (Open)
64
IFIN
I
FM/AM IF signal input
65
EO (DO1)
O
PLL error signal output
66
NC (DO2)
—
Not used. (Open)
67
HOLD
I
Not used. (Connect to ground in this set)
68
NC
—
Not used. (Open)
69
GND
—
Ground
70
FM IN
I
FM oscillation signal input
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