Sony XR-C7220 / XR-C7300 / XR-C7300W Service Manual ▷ View online
XR-C7220/C7300/C7300W
– 31 –
– 32 –
6-8.
SCHEMATIC DIAGRAM – PANEL Section –
•
See page 18 for Waveform.
(Page 24)
– 33 –
– 34 –
• IC Block Diagrams
– MAIN Board –
– MAIN Board –
IC1
TB2118F (EL)
IC301
CXA2510AQ-T4
IC671
BA3918-V3
IC361
LB1638M
IC401
TDA7462D
VDD
AMP
AMP
AMP
VDD2
1
2
3 4 5 6
7
8
9
10
24 23
22 21
20
19
18
17
16 15
11
12
14 13
XO
OSC
CE
DIN
CK
DOUT
SR
I/O-1
I/O-2
OUT-1
OUT-2
VDD2
IFC
VDD
FM IN
AM IN
D-GND
FM CP OUT
VT
AM CP OUT
VCC
REG
A-GND
XI
SERIAL
INTERFACE
I/O
PORT
OSCILLATOR
ON/OFF
BUFFER
REFERENCE
DIVIDER
PHASE
COMPARATOR
20BIT
IF COUNTER
PRESCALLER
12BIT
PROGRAMMABLE
COUNTER
+
–
REGULATOR
18BIT
18BIT
22BIT
40BIT SHIFT
REGISTER
REF
VCC
SEEK/RECP
SEEK/RECP
+
–
SIG
4BIT SWALLOW
COUNTER
OUTPUT
PORT
+
+
+
–
–
+
–
+
–
+
–
+ –
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
1
2
3
4
5
6
7
8
9
10
GND
IN1
VCC
IN2
GND
N.C.
OUT2
VS
OUT1
N.C.
CONTROL LOGIC
SE3L
SE3R
MUTE
SDA
SCL
PAUSE
OUT FL
OUT FR
OUT RL
OUT RR
SUBOUT+
SUBOUT–
VDD
GND
CREF
SE1L
SE1R
MD+
MD–
CDL+
CDL–
CDR–
CDR+
PDR
PDGND
PDL
SE2L
SE2R
INPUT
GAIN &
AUTO
ZERO
ZERO
PAUSE
DETECT
INPUT MUL
TIPLEXER &
MIXING ST
AGE
REAR SIDE
SELECTOR
FRONT SIDE
SELECTOR
LOUDNESS
CONTROL
CIRCUIT
INPUT
GAIN
BEEP
LOUDNESS
CONTROL
CIRCUIT
SOFT
MUTE
VOLUME
CONTROL
CIRCUIT
COMPANDER
TREBLE/
BASS
CONTROL
CIRCUIT
SUBWOOFER
OUT
FADER
SUBWOOFER
LP
IIC
BUS
DIGITAL CONTROL CIRCUIT
POWER
SUPPLY
FRONT
FADER
FRONT
FADER
REAR
FADER
REAR
FADER
VOICE BANDPASS
HP
LP
SDA
SCL
1
2
3
4
5
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
+
–
+
–
+
–
+
–
OVER VOLTAGE
PROTECT
REGULATOR
1
2 3 4
5
6
7
8
9
10
12
11
NC
MODE2
MODE1
STB
VDD
AMP
VCC
ANT
COM
AM
FM
GND
IC701
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
– 35 –
6-9.
IC PIN FUNCTION DESCRIPTION
•
Pin No.
Pin Name
I/O
Function
1
SEEKOUT
O
Seek control signal output to the FM/AM tuner unit (TU1)
AM mode: Used for IF count output/SD output request/AGC cut at SEEK or BTM
FM mode: Used for SD speed up at SEEK, BTM, or AF
“L” is output at tuner off
AM mode: Used for IF count output/SD output request/AGC cut at SEEK or BTM
FM mode: Used for SD speed up at SEEK, BTM, or AF
“L” is output at tuner off
2, 3
NCO
O
Not used (open)
4
ST-MONO
I/O
FM stereo broadcasting detection signal input from the FM/AM tuner unit (TU1), or forced
monaural control signal output to the FM/AM tuner unit (TU1)
“L” is input in the FM stereo mode, or “L” is output in the forced monaural mode
monaural control signal output to the FM/AM tuner unit (TU1)
“L” is input in the FM stereo mode, or “L” is output in the forced monaural mode
5
TUNMUTE
O
Muting on/off control signal output of the FM and AM tuner signal “H”: muting on
6
FM-ON
O
FM system power supply on/off control signal output to the BA3918 (IC671)
“L”: AM power on, “H”: FM power on
“L”: AM power on, “H”: FM power on
7
TU-ON
O
Tuner system power supply on/off control signal output to the BA3918 (IC671)
“H”: tuner power on
“H”: tuner power on
8
VCC
—
Power supply terminal (+5V)
9
NCO
O
Not used (open)
10
BUS-ON
O
Bus on/off control signal output to the SONY bus interface (IC701) “L”: bus on
11
SYSRST
O
Reset signal output to the SONY bus interface (IC701) “L”: reset
12
DOORSW
I
Front panel open/close detection signal input “L” is input when the front panel is closed
13
LCD SO
O
Serial data output to the liquid crystal display driver (IC901)
14
LCD CKO
O
Serial data transfer clock signal output to the liquid crystal display driver (IC901)
15
BEEP
O
Beep sound drive signal output terminal
16
LCD CE
O
Chip enable signal output to the liquid crystal display driver (IC901) “H” active
17
UNISI
I
Serial data input from the SONY bus interface (IC701)
18
UNISO
O
Serial data output to the SONY bus interface (IC701)
19
UNICKO
O
Serial data transfer clock signal output to the SONY bus interface (IC701)
20
SD-IN
I
Station detector detect input from the FM/AM tuner unit (TU1)
Stop level for SEEK, BTM, etc. is determined SD is present at input of “H”
Stop level for SEEK, BTM, etc. is determined SD is present at input of “H”
21 to 23
NCO
O
Not used (open)
24
SIRCS
I
Sircs remote control signal input from the remote control receiver (IC951)
25
PLLSI
I
PLL serial data input from the FM/AM PLL (IC1)
26
PLLSO
O
PLL serial data output to the FM/AM PLL (IC1)
27
PLLCKO
O
PLL serial data transfer clock signal output to the FM/AM PLL (IC1)
28
PLLCE
O
PLL chip enable signal output to the FM/AM PLL (IC1) “H” active
29
ILL-ON
O
30 to 32
NCO
O
Not used (open)
33
VSS
—
Ground terminal
34
C
—
Connected to coupling capacitor for the power supply
35
AD-ON
O
A/D converter power control signal output terminal
When the KEYACK (pin &§) that controls reference voltage power for key A/D conversion input
is active, “L” is output from this terminal to enable the input
When the KEYACK (pin &§) that controls reference voltage power for key A/D conversion input
is active, “L” is output from this terminal to enable the input
36
RE-IN0
I
37
RE-IN1
I
38
DVCC
—
Power supply terminal (+5V) (for D/A converter)
39
DVSS
—
Ground terminal (for D/A converter)
Power on/off control signal output of the illumination LED and liquid crystal display driver
(IC901) “H”: power on Depends on initial setting of power select switch (S501)
Power select switch (S501) on: “H” output at the accessory on
Power select switch (S501) off: “H” output at the power on
(IC901) “H”: power on Depends on initial setting of power select switch (S501)
Power select switch (S501) on: “H” output at the accessory on
Power select switch (S501) off: “H” output at the power on
Dial pulse input of the rotary encoder (RE900)
(for VOLUME/BASS/TREBLE/BALANCE/FADER control)
(for VOLUME/BASS/TREBLE/BALANCE/FADER control)
MAIN BOARD IC501 (SYSTEM CONTROLLER)
MB90574PFV-G-180-BND (XR-C7220) MB90574PFV-G-181-BND (XR-C7300/C7300W)
MB90574PFV-G-180-BND (XR-C7220) MB90574PFV-G-181-BND (XR-C7300/C7300W)
– 36 –
Pin No.
Pin Name
I/O
Function
40, 41
NCO
O
Not used (open)
42
AVCC
—
Power supply terminal (+5V) (for A/D converter)
43
AVRH
I
Reference voltage (+5V) input terminal (for A/D converter)
44
AVRL
I
Reference voltage (0V) input terminal (for A/D converter)
45
AVSS
—
Ground terminal (for A/D converter)
46
KEYIN0
I
Key input terminal (A/D input) (LSW901 to LSW904, S901, LSW906)
OFF, SOURCE, MODE
OFF, SOURCE, MODE
*, SOUND, SEEK/AMS = 0 – + ) +, SHIFT keys
input
47
KEYIN1
I
Key input terminal (A/D input)
(LSW801, LSW922, LSW923, LSW925, LSW926, LSW928 to LSW933)
6, PRESET DISC –/+, DSPL, 6, 5 ENTER, 4 n, 3 PLAY MODE, 2 SET UP, 1 N keys input
(LSW801, LSW922, LSW923, LSW925, LSW926, LSW928 to LSW933)
6, PRESET DISC –/+, DSPL, 6, 5 ENTER, 4 n, 3 PLAY MODE, 2 SET UP, 1 N keys input
48
RC-IN0
I
Rotary remote commander key input terminal (A/D input)
49
DSTSEL
I
Destination setting terminal (fixed at “L”)
50
NOISE DET
I
Noise level detection signal input at SEEK mode (A/D input) Not used (open)
51
D-BASS
I
D-BASS switch (S981) input terminal (A/D input)
52
MTP
I
Multi-path detection signal input from the RDS decoder Not used (fixed at “L”)
53
VSM
I
FM and AM signal meter voltage detection input from the FM/AM tuner unit (TU1)
(A/D input)
(A/D input)
54
VCC
—
Power supply terminal (+5V)
55
RAMBU
I
Internal RAM reset detection signal input from the XC61BN3312MR (IC651)
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset
56
POWSEL
I
Power select switch (S501) input terminal “L”: off (halt mode), “H”: on (operation mode)
57
NCO
O
Not used (open)
58
TESTIN
I
Setting terminal for the test mode “L”: test mode, Normally: fixed at “H”
59
DOOR-IND
O
LED drive signal output of the tape window illumination and
6 indicators (LED801, LSW801)
“H”: LED on “H” is output to turn on LED when front panel is opened
60
EVOL MUTE
O
Muting control signal output to the electrical volume (IC401)
Volume minimum: “
Volume minimum: “
∞
” output (“H” active)
61
COLR SW
I
Setting terminal for the illumination color
“L”: 2 colors, “H”: 1 color (fixed at “L” in this set)
“L”: 2 colors, “H”: 1 color (fixed at “L” in this set)
62
COLR SEL
I
Setting terminal for the illumination color “L”: amber, “H”: green (fixed at “H” in this set)
63
VSS
—
Ground terminal
64
NCO
O
Not used (open)
65
MUTE
O
Audio line muting on/off control signal output terminal “H”: muting on
66
FILE
I
Input terminal to set whether custom file function is provided or not
“L”: none, “H”: provided (Fixed at “H” in this set)
“L”: none, “H”: provided (Fixed at “H” in this set)
67
TEXT
I
Input terminal to set whether CD text function is provided or not
“L”: none, “H”: provided (Fixed at “H” in this set)
“L”: none, “H”: provided (Fixed at “H” in this set)
68
AMP MUTE
O
Muting on/off control signal output to the power amplifier (IC611) “L”: muting on
69
FLASH-W
I
Internal flash memory data write mode detection signal input terminal “L”: data write mode
Not used (fixed at “H” in this set)
Not used (fixed at “H” in this set)
70
I2C SIO
I/O
Two-way data bus with the electrical volume (IC401)
71
I2C CKO
O
Bus clock signal output to the electrical volume (IC401)
72
RC-IN1
I
Rotary remote commander shift key input terminal “L”: shift
73
X1A
O
Sub system clock output terminal (32.768 kHz)
74
X0A
I
Sub system clock input terminal (32.768 kHz)
75
DAVN
I
Data transmit completed detect signal input from the RDS decoder “H” active
Not used (fixed at “L”)
Not used (fixed at “L”)
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