Sony XR-C5500T Service Manual ▷ View online
18
18
XR-C5500T
6-9.
PRINTED WIRING BOARD – KEY Board –
• Semiconductor
Location
Ref. No.
Location
IC901
C-6
LED901
A-2
LED902
C-2
LED903
C-3
LED904
A-3
LED910
B-12
LED911
A-12
LED912
A-5
LED913
B-5
• Semiconductor
Location
Ref. No.
Location
D901
A-11
D902
B-10
D903
B-10
D904
B-10
D951
C-4
D952
B-6
IC951
B-8
(Page 17)
19
19
XR-C5500T
6-10. SCHEMATIC DIAGRAM – KEY Board –
• See page 13 for waveform.
(Page
17)
20
20
+
–
+
–
+
–
+
–
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
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
• IC Block Diagrams
– MAIN Board –
– MAIN Board –
IC301
CXA2509AQ-T4
IC351
LB1930M-TLM
IC581
BA8270F-E2
IC611
BA4908-V3
IC331
TDA7402TR
+
–
–
+
–
+
–
+
–
+ –
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
/70
µ
X1
X1
VCT
+
F1
120
µ
/70
µ
24dB
F3
LPF
VCC
DETECT
MS ON/
OFF
FWD/RVS
TAPE EQ
TAPE/AUX
NR BIAS
24dB
MS
MODE
T2
T1
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
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
21
6-11.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC501 MN101C49KTA2 (MASTER CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
VREF
I
Reference voltage (0V) input terminal (for A/D converter)
2
VSM
I
FM and AM signal meter voltage detection input from the FM/MW/SW tuner unit (TU1)
(A/D input)
(A/D input)
3
FMAGC
I
FM AGC level detection signal input from the FM/MW/SW tuner unit (TU1) (A/D input)
4
KEYIN1
I
Key input terminal (A/D input) (LSW801, LSW909, LSW912 to LSW917)
Z
Z
, D-BASS, 6, 5, 4, 3, SHUF 2, REP 1
keys input
5
KEYIN0
I
Key input terminal (A/D input) (LSW901 to LSW907, S901 to S904)
OFF, SOURCE, SOUND, MENU, DSPL, MODE o, ENTER, SEEK/AMS – . m,
PRST + DISC +, SEEK/AMS + > M, PRST – DISC – keys input
OFF, SOURCE, SOUND, MENU, DSPL, MODE o, ENTER, SEEK/AMS – . m,
PRST + DISC +, SEEK/AMS + > M, PRST – DISC – keys input
6
DSTSEL
I
Destination setting terminal (fixed at “L” in this set)
7
RCIN0
I
Rotary remote commander key input terminal (A/D input)
8
QUALITY
I
Noise level detection signal input at SEEK mode (A/D input) Not used (open)
9
—
O
Not used (open)
10
VREF
I
Reference voltage (+5V) input terminal (for A/D converter)
11
VDD
—
Power supply terminal (+5V) (for A/D converter)
12
OSCOUT
O
Main system clock output terminal (18.432 MHz)
13
OSCIN
I
Main system clock input terminal (18.432 MHz)
14
VSS
—
Ground terminal (for A/D converter)
15
XIN
I
Sub system clock input terminal (32.768 kHz)
16
XOUT
O
Sub system clock output terminal (32.768 kHz)
17
MMOD
I
Not used (fixed at “L”)
18
NOSESW
I
Front panel block remove/attach detection signal input
“L”: front panel is attached, “H”: front panel is removed
“L”: front panel is attached, “H”: front panel is removed
19
BUSON
O
Bus on/off control signal output to the SONY bus interface (IC581) “L”: bus on
20
SYSRST
O
Reset signal output to the SONY bus interface (IC581) “L”: reset
21
LCDSO
O
Serial data output to the liquid crystal display driver (IC901)
22
LCDCE
O
Chip enable signal output to the liquid crystal display driver (IC901) “H” active
23
LCDCKO
O
Serial data transfer clock signal output to the liquid crystal display driver (IC901)
24
RCIN1
I
Rotary remote commander shift key input terminal “L”: shift
25
RAMBU
I
Internal RAM reset detection signal input terminal
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 50 msec after reset Not used (fixed at “L”)
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 50 msec after reset Not used (fixed at “L”)
26
KEYACK
I
Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
and eject keys in the power off status On at input of “H”
and eject keys in the power off status On at input of “H”
27
—
O
Not used (open)
28
BUIN
I
Battery detect signal input from the SONY bus interface (IC581) and battery detect circuit
“L” is input at low voltage
“L” is input at low voltage
29
SIRCS
I
Sircs remote control signal input form the remote control receiver (IC951)
30, 31
—
O
Not used (open)
32
MTLIN
I
Auto metal detection signal input terminal “H”: auto metal Not used (fixed at “L”)
33
RESET
I
System reset signal input from the reset signal generator (IC551) and reset switch (S551)
“L”: reset “L” is input for several 100 msec after power on, then it changes to “H”
“L”: reset “L” is input for several 100 msec after power on, then it changes to “H”
34
TUNON
O
Tuner system power supply on/off control signal output to the BA4908 (IC611)
“H”: tuner power on
“H”: tuner power on
35
BEEP
O
Beep sound drive signal output to the power amplifier (IC751)
36
PW ON
O
Main system power supply on/off control signal output to the BA4908 (IC611) “H”: power on
37
COLSEL
I
Setting terminal for the illumination color “L”: amber, “H”: green Fixed at “H” in this set
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