Sony CFD-S27 (serv.man2) Service Manual ▷ View online
– 13 –
Pin No.
Pin name
I/O
Description
1 – 19
SEG 18 – 0
O
LCD segment output.
20 – 23
COM 3 – 0
O
LCD common output.
24
VLC1
I
LCD drive deviced voltage input.
25
VLC2
I
LCD drive deviced voltage input.
26
VLC3
I
LCD drive deviced voltage input.
27
VL
I
LCD drive deviced voltage input.
28
RMC
–
Not used (Open).
29
SCOR
I
CD SCOR signal input.
––––––
30
TX
I
Sub clock input (32,768kHz).
31
TEX
O
Sub clock output (32,768kHz).
––––––––
32
RST
I
System reset input.
33
NC
–
Not used (Open).
34
V
DD
–
Power supply.
35
KEY1
I
Key input.
36
KEY2
I
Key input.
37
KEY3
I
Key input.
38
KEY4
I
Key input.
39
INIT
O
Initial output.
40
Destination
I
Destination select input.
41
9k/10k
I
9k/10k switching detection.
42
REG-CHK
I
Regulator check input.
43
NC
–
Not used (Open).
44
C-SQCK
O
Sub-code Q data reading clock output.
45
C-SENSE
I
Sens input from CD DSP (IC702).
46
C-SQSO
I
Sub-code Q data input.
47
A-MUTE
O
Audio mute output.
48
V-DATA
O
Serial data output to electrical volume (IC351).
49
V-CLK
O
Serial clock output to electrical volume (IC351).
50
V-CE
O
Chip enable output to electrical volume (IC351).
51
REG-CON
O
Regulator ON/OFF control.
52
TAPE
O
Function select signal output. “H” : Tape
––––––––––––––
53
RADIO
O
Radio B+ ON/OFF control.
––––––
54
CD
O
CD B+ ON/OFF control.
55
REC
I
REC signal input. “H” : REC, “L” : PB
56
CD-DOOR
I
CD door open/close detect.
57
R-COUNT
I
Radio count data input from PLL (IC3).
58
R-ST
I
Radio stereo signal input from PLL (IC3).
59
C-MUTE
O
CD mute output.
60
PA-CON
O
Power amp (IC305) control output.
61
WP
I
Wake-up signal input terminal.
–––––––––––––––
62
T-PLAY
I
Tape play detect.
63
C-XRST
O
Reset output for CD (IC701, IC702, IC704).
64
C-DATA
O
Serial data output for DSP (IC702).
65
C-CLK
O
Serial clock output for DSP (IC702).
SECTION 5
DIAGRAMS
5-1. EXPLANATION OF IC TERMINALS
IC801 CXP50716-080Q (SYSTEM CONTROL)
– 14 –
Pin No.
Pin name
I/O
Description
66
C-XLAT
O
Serial clock latch output for DSP (IC702).
67
R-MUTE
O
Radio mute signal output.
68
R-DATA
O
Serial data output to PLL (IC3).
69
R-CLK
O
Serial clock output to PLL (IC3).
70
R-CE
O
Chip enable output to PLL (IC3).
71
V
SS
–
Ground.
72
XTAL
O
System main clock output (4.19MHz)
73
NC
–
Not used (Open).
74
EXTAL
I
System main clock input (4.19MHz)
75
VREF
–
Not used (Open).
76
SHIFT-CLK
O
Shift clock output.
77
LD ON
O
Laser power ON/OFF control.
78 – 80
SEG21– 19
O
LCD segment output.
– 15 –
– 16 –
– 18 –
– 17 –
CFD-S27
5-2. BLOCK DIAGRAM
• Signal path.
F
: FM
E
: PB
a
: REC
J
: CD
r
Circuit Boards Location
POWER board
AC INLET board
REC SW board
BATT board
CD MOTOR board
TUNER board
MAIN board
SW board
TUNER RETAINER board
– 23 –
– 24 –
– 26 –
– 25 –
CFD-S27
5-4. SCHEMATIC DIAGRAM – MAIN SECTION (1/2) – (FORMER TYPE)
1
IC3
1
r
Waveforms
VOLT/DIV : 0.2 V AC
TIME/DIV : 10
TIME/DIV : 10
µ
sec
2
IC801
&™
VOLT/DIV : 1 V AC
TIME/DIV : 0.1
TIME/DIV : 0.1
µ
sec
3
IC801
#º
VOLT/DIV : 1 V AC
TIME/DIV : 10
TIME/DIV : 10
µ
sec
1.1 Vp-p
75 kHz
4.19 MHz
3.6 Vp-p
4.4 Vp-p
32.768 kHz
r
Refer to page 31 for IC Block Diagrams.
Note:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
Note: The components identified by mark
!
or dotted
line with mark
!
are critical for safety.
Replace only with part number specified.
•
U
: B+ Line.
• Power voltage is dc 9V and fed with regulated dc power
supply from battery terminal.
no mark : FM (Radio section)
no mark : FM (Radio section)
PLAY (Tape section)
(
) : AM (Radio section)
REC (Tape section)
• Voltages and current are taken with a VOM (Input imped-
ance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: FM
E
: PB (L-CH)
d
: PB (R-CH)
a
: REC (L-CH)
G
: REC (R-CH)
J
: CD
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