Sony CFD-E77L Service Manual ▷ View online
37
CFD-E77L
RF GND
3
2
1
IF REQ
AM
MIX
FM RFIN
AM LOW CUT
5
4
MIX OUT
VCC
AM IF IN
8
7
6
FM IF IN
GND
10
9
AGC
QUAD
12
11
R-OUT
L-OUT
FM RFOUT
22
23
24
20
21
17
18
19
15
16
13
14
AM RFIN
RF VCC
FM OSC
ST LED
OSC OUT
AM OSC
IF REQ
LPF1
MPX IN
DET OUT
LPF2
FM
MIX
FM
OSC
LEVEL
DET
AM
DET
MUTE
FM
DET
ST/MO
FM/AM
AM
OSC
AGC
SW
ST
1/8
BUFF
BUFF
DIVIDE
DECODE
VCO
IF BUFF
AF BUFF
AF
FM RF
AM IF
FM IF
1/1 OR
1/16
–
+
+
VCC
28
27
26
25
24
23
22
21
20
19
18
17
16
15
LEVEL
SHIFT
–
+
+
VCC
LEVEL
SHIFT
+
–
–
1
2
3
5
6
7
8
9 10
11
12
13 14
LEVEL
SHIFT
+
–
–
+
–
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
REGULATOR VOLTAGE DETECT,
BIAS VOLTAGE DETECT,
THERMAL SHUT DOWN
4
–
+
+
DRIVER
MUTING
GND
OUT4-B
OUT4-A
IN4
IN4'
VREFIN
VCC
VCC
IN3'
IN3
OUT3-A
OUT3-B
NC
OPIN-B
OUT1-B
OUT1-A
IN1
RESET
REG-B
REGOUT
MUTE
GND
IN2'
IN2
OUT2-A
OUT2-B
GND
OPOUT
LEVEL
SHIFT
– TUNER Board –
IC1
TA2149N
IC702
BA6998FP
38
CFD-E77L
IC2
LC72137M-TLM
– TC Board –
IC301
TA2068N
11
10
9
8
7
6
5
4
3
2
1
12
13
14
15
16
19
20
UNLOCK
DETECTOR
POWER ON
RESET
UNIVERSAL
COUNTER
CCB
I/F
CE
DI
CL
DO
XOUT
AOUT
XIN
AIN
PD
VSS
VDD
B04
FMIN
AMIN
B01
B02
B03
I01
I02
IFIN
PHASE
DETECTOR
CHARGE
PUMP
REFERENCE
DIVIDER
SWALLOW
COUNTER
1/16,1/17
4BITS
12BITS
PROGRAMMABLE
DIVIDER
DATA SHIFT REGISTER
LATCH
1/2
17
18
1
2
3
6
9
10
11
12
8
7
4
5
22
TAPE
TAPE
TAPE
BUF AMP
A1
BUF AMP
A2
NAB
AMP1
NAB
AMP2
23
24
15
14
13
21
20
17
16
RADIO
BUF AMP
B1
BUF AMP
B2
MUTE
MUTE
ON
ON
ON
7dB
26dB
26dB
MONITOR
AMP
LOGIC
18
19
MUTE
7dB
MONITOR
AMP
LINE
TAPE
RADIO
LINE
ALC2
ALC1
DET
REC
AMP1
REC
AMP2
2.1
REF
AMP
MIC
AMP1
LINE
IN1
IN1
INT
EXT
RADIO
IN1
EXT
RADIO
IN1
REC
PLAY
PLAY
PRE
OUT1
OUT1
PRE
OUT2
OUT2
RADIO
LINE
LINE
RADIO
IN2
IN2
LINE
IN2
IN2
MIC
IN
IN
TAPE
TAPE
TAPE
VCC
ALC
NAB
OUT1
NAB
NF1
REC
OUT1
NAB
IN1
VREF
GND
NAB
IN2
REC
OUT2
NAB
NF2
NAB
OUT2
MIC
NF
39
CFD-E77L
•
MAIN BOARD IC801 CXP83624-035Q (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
CD-WRQ
I
Interruption detection signal input from the digital signal processor
2
RMC
I
Sircs remote control signal input
3
BUZZER
O
Buzzer sound signal output
4
N.C
O
Not used
5
CD-RES
O
System reset signal output to the digital signal processor “L”: reset
6
CD CE
O
Chip enable signal output to the digital signal processor
7
CD CL
O
Serial data transfer clock signal output to the digital signal processor
8
CD DO
I
Serial data input from the digital signal processor
9
CD DI
O
Serial data output to the digital signal processor
10
CD DRF
I
Focus on/off detection signal input from the digital signal processor
11
CD FSEQ
I
Synchronizing signal detection signal input from the digital signal processor
12
V-DATA
O
Serial data output to the electrical volume
13
V-CLOCK
O
Serial data transfer clock signal output to the electrical volume
14
N.C
O
Not used
15
MEGABASS
O
Megabass on/off control signal output “L”: megabass on
16
A-MUTE
O
Audio muting on/off control signal output to the electrical volume “H”: muting on
17
N.C
O
Not used
18
CD
O
Power on/off control signal output for the CD +5V power supply, and CD function control signal
output to the recording/playback equalizer amplifier “H”: CD power on
output to the recording/playback equalizer amplifier “H”: CD power on
19
P-CON
O
Power on/off control signal output to the power supply circuit, and power amplifier
“L”: standby mode, “H”: power on
“L”: standby mode, “H”: power on
20
CD DOOR
I
CD lid open/close detection switch input terminal “L”: CD lid is closed, “H”: CD lid is opened
21
REG CHK
I
Regulator check signal input of the AC input or battery input “H” active
22
N.C
O
Not used
23, 24
KEY-1, KEY-2
I
Key input terminal (A/D input)
25
JOG-B
I
Jog dial pulse input from the rotary encoder (B phase input)
26
JOG-A
I
Jog dial pulse input from the rotary encoder (A phase input)
27
SIMUKE CHECK
I
Destination setting terminal
28
INIT
O
Initial setting signal output
29
SHIFT CLK
O
Shift clock output of the main system clock (4.19 MHz) “H” active
30
RST
I
System reset signal input “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”
31
EXTAL
I
Main system clock input terminal (4.19 MHz)
32
XTAL
O
Main system clock output terminal (4.19 MHz)
33
VSS
—
Ground terminal
34
VL
O
Liquid crystal display drive bias control signal output terminal
35 to 37
VLC3 to VLC1
—
Terminal for doubler circuit capacitor connection to develop liquid crystal display drive voltage
38 to 41
COM0 to COM3
O
Common drive signal output to the liquid crystal display
42 to 61
SEG0 to SEG19
O
Segment drive signal output to the liquid crystal display
62 to 64
N.C
O
Not used
65
RADIO
O
Power on/off control signal output for the radio +6V power supply “H”: radio power on
66
TU-CE
O
PLL chip enable signal output to the FM/AM PLL
67
TAPE
O
Tape function control signal output to the recording/playback equalizer amplifier
“L”: radio or CD on, “H”: tape on
“L”: radio or CD on, “H”: tape on
6-19.
IC PIN FUNCTION DESCRIPTION
40
CFD-E77L
Pin No.
Pin Name
I/O
Description
68
TU-DATA
O
PLL serial data output to the FM/AM PLL
69
TU-CLK
O
PLL serial data transfer clock signal output to the FM/AM PLL
70
TU-MUTE
O
Tuner muting on/off control signal output to the FM/AM PLL “H”: muting on
71
BEEP-H/L
O
Beep level H/L control signal output “L”: low, “H”: high
72
VDD
—
Power supply terminal (+5V)
73
TX
O
Sub system clock output terminal (32.768 kHz)
74
TEX
I
Sub system clock input terminal (32.768 kHz)
75
NC
O
Not used
76
ISS-1
O
ISS 1 on/off control signal output “H”: ISS 1 on
77
ISS-2
O
ISS 2 on/off control signal output “H”: ISS 2 on
78
TU-COUNT
I
PLL serial count data input from the FM/AM PLL
79
TC-REC
I
Recording/playback detection signal input “L”: playback mode, “H”: recording mode
80
TC-PLAY
I
Tape play detection switch input terminal “L”: tape play mode
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