Sony XR-C5120 Service Manual ▷ View online
XR-C5120
6-6.
SCHEMATIC DIAGRAM – KEY Board –
• See page 16 for Waveform.
– 25 –
– 26 –
(Page 22)
– 27 –
– 28 –
• IC Block Diagrams
– MAIN Board –
– MAIN Board –
IC21
TB2118F-EL-S
IC301
CXA2509AQ-T4
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
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
IC331
TDA7462D
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
IC351
LB1930M-TLM
1
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
BA3918-V2
+
–
+
–
+
–
+
–
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
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
– 29 –
6-7.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC501 MN101C12GTA1 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Function
1
AVREF–
I
Reference voltage (0V) input terminal (for A/D converter)
2
VSM
I
FM and AM signal meter voltage detection input from the FM/AM tuner unit (TU1)
(A/D input)
(A/D input)
3
KEYIN1
I
Key input terminal (A/D input) (LSW921 to LSW923, LSW927 to LSW933)
6, PRESET DISC –/+, DSPL, 6, 5, 4 n, 3 PLAY MODE, 2 SET UP, 1 N keys input
6, PRESET DISC –/+, DSPL, 6, 5, 4 n, 3 PLAY MODE, 2 SET UP, 1 N keys input
4
KEYIN0
I
Key input terminal (A/D input) (LSW901 to LSW903, S901, LSW905, LSW906)
OFF, SOURCE, MODE
OFF, SOURCE, MODE
*, SEEK/AMS = 0 – + ) +, SOUND, SHIFT keys
input
5
D-BASS IN
I
D-BASS switch (S981) input terminal (A/D input)
6
DSTSEL
I
Destination setting terminal (fixed at center voltage in this set)
7
FUNC-SEL
I
Setting terminal for the function select (fixed at “H” in this set)
8
NCO
O
Not used (open)
9
RC-IN0
I
Rotary remote commander key input terminal (A/D input)
10
AVREF+
I
Reference voltage (+5V) input terminal (for A/D converter)
11
VDD
—
Power supply terminal (+5V)
12
OSC OUT
O
Main system clock output terminal (18.432 MHz)
13
OSC IN
I
Main system clock input terminal (18.432 MHz)
14
GND
—
Ground terminal
15
XT IN
I
Sub system clock input terminal (32.768 kHz)
16
XT OUT
O
Sub system clock output terminal (32.768 kHz)
17
GND
—
Ground terminal
18
RC-IN1
I
Rotary remote commander shift key input terminal “L”: shift
19
SYSRST
O
Reset signal output to the SONY bus interface (IC581) “L”: reset
20
BUS-ON
O
Bus on/off control signal output to the SONY bus interface (IC581) “L”: bus on
21
UNISO
O
Serial data output to the SONY bus interface (IC581)
22
UNISI
I
Serial data input from the SONY bus interface (IC581)
23
UNICKO
O
Serial data transfer clock signal output to the SONY bus interface (IC581)
24
UNICKI
I
Serial data reading clock signal input for the SONY bus interface Not used (open)
25
NCO
O
Not used (open)
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
NOSESW
I
Front panel block remove/attach detection signal input terminal
“L”: front panel is attached
“L”: front panel is attached
28
BU-IN
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 terminal Not used (fixed at “L”)
30
TEL-ATT
I
Telephone muting signal input terminal At input of “H”, the signal is attenuated by –20 dB
Not used (fixed at “L”)
Not used (fixed at “L”)
31
TEST-IN
I
Setting terminal for the test mode “L”: test mode, Normally: fixed at “H”
32
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 100 msec after reset Fixed at “L” in this set
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset Fixed at “L” in this set
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
VOL-MUT
O
Muting control signal output to the electrical volume (IC331)
Volume minimum: “
Volume minimum: “
∞
” output (“H” active)
35
BEEP
O
Beep sound drive signal output terminal
– 30 –
Pin No.
Pin Name
I/O
Function
36
AMP-MUT
O
Muting on/off control signal output to the power amplifier (IC751) “L”: muting on
37
AMP ON
O
Standby on/off control signal output to the power amplifier (IC751)
“L”: standby mode, “H”: amp on
“L”: standby mode, “H”: amp on
38
PLL-CKO
O
PLL serial data transfer clock signal output to the FM/AM PLL (IC21)
39
PLL-CE
O
PLL chip enable signal output to the FM/AM PLL (IC21) “H” active
40
PLL-SO
O
PLL serial data output to the FM/AM PLL (IC21)
41
PLL-SI
I
PLL serial data input from the FM/AM PLL (IC21)
42
LCD-SO
O
Serial data output to the liquid crystal display driver (IC901)
43
LCD-CE
O
Chip enable signal output to the liquid crystal display driver (IC901) “H” active
44
LCD-CKO
O
Serial data transfer clock signal output to the liquid crystal display driver (IC901)
45
VOL-SIO
I/O
Two-way data bus with the electrical volume (IC331)
46
NCO
O
Not used (open)
47
VOL-CKO
O
Bus clock signal output to the electrical volume (IC331)
48
ACC-IN
I
Accessory detect signal input terminal “L”: accessory on
49
MUT
O
Audio line muting on/off control signal output terminal “H”: muting on
50
NCO
O
Not used (open)
51
AMSON
O
Tape auto music sensor control signal output to the CXA2509AQ (IC301)
“L” is output to lower the gain for audio level at FF/REW mode
“L” is output to lower the gain for audio level at FF/REW mode
52
N/R-OUT
O
Forward/reverse direction control signal output to the CXA2509AQ (IC301)
“L”: forward direction, “H”: reverse direction
“L”: forward direction, “H”: reverse direction
53
MTLON
I/O
METAL control in/out terminal
At initial mode: valid/invalid selection input of METAL function (valid at “L” input)
At normal mode: METAL on/off control signal output terminal (METAL on at “H” output)
Not used this function (fixed at “H”)
At initial mode: valid/invalid selection input of METAL function (valid at “L” input)
At normal mode: METAL on/off control signal output terminal (METAL on at “H” output)
Not used this function (fixed at “H”)
54
TAPE-MUT
O
Tape muting on/off control signal output to the CXA2509AQ (IC301) “H”: muting on
Active at ATA, FF/REW mode
Active at ATA, FF/REW mode
55
DOLON
I/O
Dolby control in/out terminal
At initial mode: valid/invalid selection input of dolby function (valid at “L” input)
At normal mode: dolby on/off control signal output terminal (dolby on at “H” output)
Not used this function (fixed at “H”)
At initial mode: valid/invalid selection input of dolby function (valid at “L” input)
At normal mode: dolby on/off control signal output terminal (dolby on at “H” output)
Not used this function (fixed at “H”)
56
AMSIN
I
Whether a music is present or not from CXA2509AQ (IC301) is detected at auto music sensor
“L”: music is present, “H”: music is not present
“L”: music is present, “H”: music is not present
57 to 75
NCO
O
Not used (open)
76
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
77
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”
78
RE-IN0
I
79
RE-IN1
I
80
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
81
POWSEL
I
Power select switch (S501) input terminal “L”: off (halt mode), “H”: on (operation mode)
82
ILL-ON
O
83
REEL
I
Rotation detect signal input from supply reel sensor and take-up reel sensor on the deck
mechanism
mechanism
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)
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