Sony XR-C5500 / XR-C5604X Service Manual ▷ View online
XR-C5500/C5604X
25
25
7-6.
SCHEMATIC DIAGRAMS – KEY/SUB BOARDS –
•
•
See page 20 for Waveform.
XR-C5500/C5604X
26
26
IC301
CXA2509AQ-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
PBFB1
PBRIN1
PBREF1
PBFIN1
35
36
PBGND
VCT
PBFIN2
PBREF2
PBRIN2
PBFB2
PBEQ1
PBOUT1
VCC
TAPEIN1
AUXIN1
MSLPF
LINEOUT1
NC
NC
G2FB
G1FB
MSTC
DGND
MSOUT
NC
NC
INSW
TAPESW
MSMODE
DRSW
MSSW
NC
NC
LINEOUT2
DIREF
AUXIN2
TAPEIN2
PBEQ2
PBOUT2
GND
F2
120
µ/70µ
X1
X1
VCT
+
F1
120
µ/70µ
24dB
F3
LPF
VCC
DETECT
MS ON/
OFF
FWD/RVS
TAPE EQ
TAPE/AUX
NR BIAS
24dB
MS
MODE
T2
T1
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
+
–
+
–
+
–
+
–
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
7-7.
IC BLOCK DIAGRAMS
IC331
TDA7402TR
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
27
Pin No.
Pin Name
I/O
Function
Reference voltage (– side) of AD conversion Connect to power ground if no problems
such as noise
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
Reference voltage (+ side) of AD conversion As current is always flowing, make sure that current
is supplied only when the power of the system is turned ON by the master microprocessor
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
Rotary Commander Shift input terminal
Rotary Commander Shift input
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
belowthe 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
7-8. IC PIN FUNCTION
• IC501 MASTER MICRO COMPUTER (MN101C49KTA) (MAIN Board)
1
VREF
—
2
VSM
I
3
FMAGC
I
7
RCIN0
I
10
VREF
—
18
NOSESW
I
19
BUSON
O
20
SYSRST
O
21
LCDSO
O
22
LCDCE
O
23
LCDCKO
O
24
RCIN1
I
25
RAMBU
I
28
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 backup by
detecting the rising edge, falling edge, and both edges of the interrupt request flag
When the micropro cessor is in the HALT mode, it can be cleared from this mode using
this interrupt
Remote control input
Use the interrupt input port
When not using this terminal, be sure to fix at “H” or “L”
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
Xplod model acknowledge terminal
Sets the slave illumination to amber when “H” Amber 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
fromOFF to ON, the test mode is set Once test mode 1 is set, the TEST input is not
detected in the following backup OFF/ON and test mode 1 is continued Press the OFF
button or RESET to clear To set the test mode while the backup power changes from
OFF to ON, if the power is ON, set test mode 1 and turn the power OFF
If the above fails, do not check the TEST input while the backup power changes from
OFF to ON Check only during POWER OFF
TELEPHONE MUTE detection input
Performs audio 20dB attenuation in the input on state
Set to the input on state at “H”
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
40
TELATT
I
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