Sony XR-C7350X Service Manual ▷ View online
XR-C7350X
21
21
IC301
CXA2510AQ-T4
+
–
–
+
–
+
–
+
–
+ –
1
2
3
4
5
6
7
8 9 10
20
19
18
17
16
15
14
13
12
11
21
22
23
26
27
28
29
30
31
32
33
34
37
38
39
40
24
25
PBFB2
PBRIN2
PBREF2
PBFIN2
35
36
PBGND
VCT
PBFIN1
PBREF1
PBRIN1
PBFB1
PBEQ2
PBOUT2
VCC
TAPEIN2
AUXIN2
MSLPF
LINEOUT2
TCH2
NC
PLAY
FF
MSTC
DGND
MSOUT
NC
NRSW
INSW
TAPESW
MSMODE
DRSW
MSSW
NC
TCH1
LINEOUT1
DIREF
AUXIN1
TAPEIN1
PBEQ1
PBOUT1
GND
F2
120
µ/
70
µ
X1
X1
VCT
+
F1
120
µ/
70
µ
NR
OFF/B
F3
LPF
VCC
DETECT
MS ON/
OFF
NR
MODE
FWD/RVS
TAPE EQ
TAPE/AUX
NR BIAS
NR
MS
MODE
OFF/B
T2
T1
IC331
TDA7402TR
IC351
LB1930M-TLM
1
2
2
3
4
5
6
7
8
9
10
VCC
IN2
S-GND
IN1
NC
NC
OUT2
NC
P-GND
OUT1
CONTROL
CIRCUIT
MOTOR
DRIVE
CIRCUIT
BUFFER
BUFFER
IC611
BA4908-V3
IC581
BA8270F-E2
1
2
3
4
5
5
6
7
8
9
10
14
13
12
11
BUS ON
SWITCH
RESET
SWITCH
BATTERY
SWITCH
BUS ON
RST
BATT
CLK
VREF
DATA
GND
VCC
RST
BUS ON
BUS ON
CLK IN
BU IN
DATA IN
DATA OUT
7-9.
IC BLOCK DIAGRAMS
+
–
+
–
+
–
+
–
OVER VOLTAGE
PROTECT
REGULATOR
1
2 3 4
5
6
7
8
9
10
12
11
NC
TUNER8.7 ANT SW
TUNER5.6 SW
STB
VDD5.6V
AMP
VCC
ANT
COM8.7V
TUNER5.6V
TUNER8.7V
GND
34
35
36
37
38
39
40
41
42
43
44
33 32 31
30
29
28
27
26
25
24 23
22
21
20
19
18
16
15
14
13
12
1 2
3 4 5 6
7 8 9 10
11
INPUT
MULTIPLEXER
MAIN SOURCE
SELECTOR
MIXING
SELECTOR
SECOND SOURCE
SELECTOR
MAIN
PHONO
MAIN
CH0
AUX
AM
FM
IN-GAIN
+AUTO ZERO
+
LOUDNESS
SOFTMUTE
VOLUME
TREBLE
BASS
HP
LP
COMPANDER
VOICE
BANDPASS
MUTE
IN-GAIN
LOUDNESS
DIGITAL CONTROL
IIC-BUS
HIGH-CUT
S&H
25kHz
LP
DEMODULATOR
+STEREO ADJUST
+STEREO BLAND
MULTIPATH
DETECTOR
D/A
CONVERTER
PILOT
CANCELATION
PIL DET
PLL
AM/FM
NOISE BLANKER
BEEP
80kHz
LP
17
PULSE
FORMER
QUAL
SUPPLY
SECOND
MAIN
ACIN
MONO-
FADER
MONO-
FADER
MONO-
FADER
MONO-
FADER
MONO-
FADER
MONO-
FADER
SUBWOOFER
+PHASE
CONTROL
MIXER
OUTPUT
SELECTOR
FRONT
REAR
SW
VDD
SCL
SDA
GND
SM
QUAL
MPOUT
MPIN
LEVEL
MPX
AMIF
SEL
SER
FD1L+
FD1L
–
FD1R+
FD1R
–
FD2L+
FD2L
–
FD2R+
FD2R
–
AM
ACINLF
SWINR
SWINL
ACOUTR
ACOUTL
CREF
MUX
MD1
MD1G
MD2
MD2G
ACINLR
ACINRF
ACINRR
OUTLF
OUTLR
OUTRF
OUTRR
OUTSWL
OUTSWR
OUTSSL
OUTSSR
IC811, 812
NJM2160AM-TE2
REFERENCE
REFERENCE
VCCL
+L IN
CRPL
-L IN
-R IN
CRPL
+R IN
VCCR
CL+
CL–
GND L
L OUT
R OUT
GND R
CR–
CR+
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
XR-C7350X
22
22
Key input acknowledge
Acknowledge signal input terminal to accept the function and eject key from the power
OFF state
The A/D conversion input power supply is OFF to save power in the power OFF state, and
key inputs cannot be accepted by A/D
This terminal can therefore determine if function keys have been pressed even in the
power OFF state When the microprocessor is in the HALT mode, the HALT mode is
cleared using this interrupt
27
O
Not used
BACK-UP detection input terminal
Input terminal to detect power supply back-up Used as interrupt
The circuit is set so that it becomes “H” level when above 8.5+-0.3V
When the microprocessor is in the operating mode, detects changes in the back-up by
detecting the rising edge, falling edge, and both edges of the interrupt request flag
When the microprocessor is in the HALT mode, it can be cleared from this mode using
this interrupt
Remote control input
Use the interrupt input port
30, 31
NCO
O
32
MTLIN
O
Reset input terminal
Reset at “L” level
TUNER power supply control output terminal
Active during tuner ON (includes sub- reception, ATA mode on)
Buzzer control output
Terminal for driving piezoelectric buzzer to produce beep sound
System power supply control output
Controls power ON/OFF of the system power supply (turned on when the unit operates)
Outputs “H” when the power is ON, and “L” when OFF
Illumination color switching terminal model acknowledge terminal
Sets the slave illumination to amber when “H” Green when “L”
Accessory power supply detection input
Input terminal to detect accessory Accessory is present when “L” is input
Test mode setting input terminal
Input terminal for setting the unit into the test mode
When this port becomes “L” during microprocessor reset or while the backup changes
from OFF to ON, the test mode is set
TELEPHONE MUTE detection input
40
TELATT
I
Performs audio 20dB attenuation in the input on state
Set to the input on state at “H”
Serial clock input
UNI-LINK serial interface clock input terminal
Serial data output
UNI-LINK serial interface data output terminal
Serial data input
UNI-LINK serial interface data input terminal
Pin No.
Pin Name
I/O
Function
Not used
26
KEYACK
I
28
BUIN
I
29
SIRCS
I
33
RESET
O
34
TUNON
O
35
BEEP
O
36
PW_ON
O
37
COLSEL
I
38
ACCIN
I
39
TESTIN
I
43
UNISI
I
41
UNICLI
I
42
UNISO
O
Pin No.
Pin Name
I/O
Function
7-10. IC PIN FUNCTION
• IC501 MASTER MICRO COMPUTER (MN101C49KTA1) (MAIN Board)
2
VSM
I
3
FMAGC
I
7
RCIN0
I
18
NOSESW
I
19
BUSON
O
20
SYSRST
O
21
LCDSO
O
22
LCDCE
O
23
LCDCKO
O
25
RAMBU
I
1
VREF
—
Reference voltage (– side) of AD conversion
FM/AM common signal meter A/D conversion input terminal
AM (MW:SW:LW), FM S meter voltage detection terminal
FM AGC A/D conversion input terminal
FM AGC voltage detection terminal
4
KEYIN1
I
KEY input
5
KEYIN0
I
Use the AD conversion input
6
DSTSEL
I
Terminal for selecting and setting destination value Reads during reset
Rotary commander input
Use the AD conversion input
8, 9
QUALITY
O
Not used
10
VREF
—
Reference voltage (+ side) of AD conversion
11
VDD
—
Power supply terminal
12
OSCOUT
O
Terminal connected to the oscillator
13
OSCIN
I
Connected to the 18.432 MHz oscillator
14
VSS
—
Ground terminal
15
XIN
I
Terminal connected to the sub-clock (for clock) oscillator
16
XOUT
O
Connected to the 32.768 kHz oscillator
17
MMOD
—
Ground terminal
Front panel disconnection/attachment detection input terminal
A panel is present when “L”
BUS ON control output
Outputs “L” when UNI-LINK communication is activated
SYSTEM RESET control output
Outputs “L” when the UNI-LINK slave microprocessor is reset
LCD serial data output
Serial interface with LCD driver IC
Outputs “L” when OFF to prevent misoperations of the C-MOS port
LCD chip enable output terminal
Serial interface with LCD driver IC
Outputs “L” when OFF to prevent misoperations of the C-MOS port
LCD serial clock output
Serial interface with LCD driver IC
Outputs “L” when OFF to prevent misoperations of the C-MOS port
24
RCIN1
I
Rotary Commander Shift input terminal
RAM reset detection input
After clearing input reset to check if the RAM data has been damaged by decreasing
voltage, checks the RAM data within 50 ms Results
“L” = Clears the RAM as the power supply voltage of the microprocessor dropped
below the minimum data maintenance voltage
“H” = Checks the RAM damage check area as the power supply voltage of the
microproces sor has not dropped below the minimum data maintenance voltage
Clears the RAM if the RAM damage check area is damaged
23
Serial clock output
UNI-LINK serial interface clock output terminal
I
2
C bus serial data input/output
Serial interface with electronic volume IC, tuner unit
46
VOLATT
O
Electronic volume mute control output terminal
I
2
C bus serial clock output
Serial interface with electronic volume IC, tuner unit
Power amplifier STANDBY control output
Performs standby ON/OFF control of the power amplifier and power IC
Power amplifier mute control output terminal
Mute terminal during AMPON output ON/OFF
System MUTE control output
Mute control output of audio signal line output stage
Set the electronic volume also to -
∞ during active
Outputs “H” when mute is ON
Immediately sets into the input state during BU-IN OFF
Tuner mute control output terminal
Controls FM and AM outputs from tuner
52
AMSON
O
Outputs “L” during AMS
FWD/REV control output
Controls tape running direction
Outputs “H” in the forward direction and “L” in the reverse direction
Metal control input/output
Switches between metal ON/OFF Metal is present when initial “L” is input
Outputs “H” during MTL ON
Tape mute control output
FF and REW are active during ATA operations
Outputs “H” during mute on when the EQ IC is connected
Dolby control input/output
Sets the presence/absence of the Dolby function during the input mode during initialization
Switches DOLBY to ON or OFF in the output mode normally
DOLBY is ON when “L” is input Outputs “H” during DOLBY ON
Sound presence/absence detection input during AMS
Detects if tape audio sound is present or absent
Sound is present when “L” is input and absent when “H” is input
4VPREOUT model acknowledge terminal
Acknowledges as 4VPREOUT model when “L”, and changes the gain amount of the
electrical control IC
59 to 69
O
Not used
70 to 73
NCO
O
Not used
EEPROM communication terminal
EEPROM data input/output terminal
EEPROM communication terminal
EEPROM clock output terminal
76
NCO
O
Not used
AM filter control terminal
Outputs “L”during 2.94 to 5.585, 14.125 to 18.135 MHz during SW reception, and
outputs “H” at other times
Pin No.
Pin Name
I/O
Function
47
I2_CKO
O
48
AMPON
O
44
UNICKO
O
45
I2C_SIO
I/O
49
AMPATT
O
50
ATT
O
56
DOLON
I/O
57
AMSIN
I
55
TAPATT
O
51
TU_ATT
O
53
NROUT
O
54
MTLON
I/O
58
4VPRE
I
75
E2P_CKO
O
77
SWSHIFT
O
74
E2P_SIO
I/O
24
Front panel open/close detection input
Panel is closed when “L”
DOOR indicator output terminal
“H” is output when uk DOORSW is “H”
“L” is output when qk NOSESW is “H”
80
REIN1
I
Rotary encoder input terminal
81
REIN0
I
AD conversion power supply control output
When the wh KEYACK terminal for controlling the AVREF power supply to input key
AD conversion inputs is active, “L” is output from this terminal to set the input possible state
Illumination power supply control output
Output control terminal of the power supply for illumination of functions keys, etc.
Depends on pressing the OFF key for two seconds to turn it OFF
OFF key normally OFF, etc
Accessory power supply detection output input (ek ACCIN)
Pressing the OFF key for two seconds to turn it off, etc
System power supply control output (eh PW_ON)
When ON output= “H” output
When OFF output= “L” output
Reel table rotation detection input
Used for detecting tape end using the terminal for detecting tape rotation
85
POS3
I
86
POS2
I
Position signal detection input
87
POS0
I
Terminal for detecting tape position Connected to mechanism deck
88
POS1
I
Loading motor control output (Loading direction)
Rotates the loading motor in the normal direction using the tape control terminal
Loading motor control output (Ejection direction)
Rotates the loading motor in the reverse direction using the tape control terminal
Becomes active together with il LMLOD, and brakes the loading motor
TAPE power supply control output
Capstan motor control output (os CMON)
Loading motor control output (Loading direction) (il LMLOD)
Loading motor control output (Ejection direction) (o; LMEJ)
Outputs on when one of the above three ports is active
At other times, does not depend on off output and power output
TAPE capstan motor control signal output terminal
Normally, linked with oa TAPON Outputs LOW when paused at TAPE BEHIND to stop
the motor
93
NCO
O
94
O
95
DAVSS
O
96
NS_MASK
O
Not used
97
O
98
O
100
DAVDD
O
91
TAPON
O
Pin No.
Pin Name
I/O
Function
83
ILLON
O
84
REL
I
89
LMLOD
O
78
DOORSW
I
79
DOORIND
O
82
AD_ON
O
90
LMEJ
O
92
CM ON
O
Rotary encoder input terminal
active ...... ON output
Inactive ...... OFF output
active ...... ON output
Inactive ...... OFF output
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