Sony MDX-C7890R Service Manual ▷ View online
– 48 –
Pin No.
Pin Name
I/O
Function
47
UNIREQ
O
Data request signal output terminal (for SONY bus) “H”: request on Not used (open)
48
UNCKI
I
Serial data transfer clock signal input from the master controller (IC700) (for SONY bus)
49
UNISI
I
Serial data input from the SONY bus interface (IC600)
50
UNISO
O
Serial data output to the SONY bus interface (IC600)
51
MD-CKO
O
Serial data transfer clock signal output to the CXD2652AR (IC301) and CXA2523R (IC302)
52
MD-SI
I
Reading serial data signal input from the CXD2652AR (IC301)
53
NCO
O
Not used (open)
54
SENS
I
Internal status (SENSE) input from the CXD2652AR (IC301)
55
CC-XINT
I
Interrupt status input from the CXD2652AR (IC301)
56
LIMIT-IN
I
Detection input from the sled limit-in detect switch (S903)
The optical pick-up is inner position when “L”
The optical pick-up is inner position when “L”
57
EJT-KEY
I
Eject request signal input terminal “L”: eject on Not used (fixed at “H”)
58
ERROR-PWM
O
PWM error monitor output terminal (C1and ATER is output when test mode) Not used (open)
59
MD-RST
O
Reset signal output to the CXD2652AR (IC301) and BH6511FS (IC303) “L”: reset
60
BU-IN
I
Battery detect signal input from the SONY bus interface (IC600) and battery check circuit
“H”: battery on
“H”: battery on
61
BUS-ON
I
SONY bus on/off control signal input from the master controller (IC700) “L”: bus on
62
SQSY
I
Subcode Q sync (SCOR) input from the CXD2652AR (IC301)
“L” is input every 13.3 msec Almost all, “H” is input
“L” is input every 13.3 msec Almost all, “H” is input
63
C-SW
I
Inputs the disc loading start or disc eject completion detect switch (S901) detection signal
“L”: When start or eject completed of the disc loading operation
“L”: When start or eject completed of the disc loading operation
64
MD-LAT
O
Serial data latch pulse signal output to the CXD2652AR (IC301) and CXA2523R (IC302)
65
MD-ON
O
Power supply on/off control signal output of the MD mechanism deck section main power supply
“H”: power on
“H”: power on
66
DEEMP
O
Emphasis on/off control signal output terminal “H”: emphasis on Not used
67
A-MUTE
O
Audio muting on/off control signal output terminal Not used
68
NCO
O
Not used (open)
69
TSTCKO
O
Output of clock signal for the test mode display Not used (open)
70
TSTSO
O
Output of data for the test mode display Not used (open)
71
TSTMOD
I
Setting terminal for the test mode “L”: test mode, “H”: normal mode
72
VCC
—
Power supply terminal (+5V)
73
NC
—
Not used (fixed at “H”)
74 to 77
TOUT0 to TOUT3
O
Output of the 4
×
8 matrix test keys Not used (open)
78 to 80
TIN0 to TIN2
I/O
Input of the 4
×
8 matrix test keys (“L” is always output, except in test mode) Not used (open)
*1 Loading motor (M903) control
LOAD (pin 6)
“H”
“L”
“H”
“L”
EJECT (pin 7)
“L”
“H”
“H”
“L”
Terminal
Operation
IN
OUT
BRAKE
STOP
– 49 –
•
MAIN BOARD IC700 (MASTER CONTROLLER)
Pin No.
Pin Name
I/O
Function
1 to 7
NC
O
Not used (open)
8
VCC
—
Power supply terminal (+5V)
9
PLL SI
I
PLL serial data input from the FM/AM PLL (IC100)
10
PLL SO
O
PLL serial data output to the FM/AM PLL (IC100)
11
PLL CKO
O
PLL serial data transfer clock signal output to the FM/AM PLL (IC100)
12
NOSE SW
I
Detects the removal of the attaching and removing type front panel block “L”: attaching
13
LCD SO
O
Serial data output to the liquid crystal display driver (IC801)
14
LCD CKO
O
Serial data transfer clock signal output to the liquid crystal display driver (IC801)
15
BEEP
O
Beep sound drive signal output terminal
16
DBMOD2
O
D-BASS mode control signal output to the SM5852ES (IC201)
17 to 19
NC
O
Not used (open)
20
UNI SI
I
Serial data input from the SONY bus interface (IC600)
21
UNI SO
O
Serial data output to the SONY bus interface (IC600)
22
UNI CKO
O
Serial data transfer clock signal output to the MD mechanism controller (IC501) and SONY bus
interface (IC600)
interface (IC600)
23 to 25
NC
O
Not used (open)
26
VOL SO
O
Serial data output to the electrical volume (IC300)
27
VOL CKO
O
Serial data transfer clock signal output to the electrical volume (IC300)
28
DSTSEL0
I
Destination setting terminal (fixed at “L”)
29
SYSRET
O
System reset signal output to the MD mechanism controller (IC501) and SONY bus interface
(IC600) “L”: reset
(IC600) “L”: reset
30
DSTSEL1
I
Destination setting terminal (fixed at “L”)
31
DMOD1
O
D-BASS mode control signal output to the SM5852ES (IC201)
32
TESTIN
I
Setting terminal for the test mode “L”: test mode (normally fixed at “H”)
33
VSS
—
Ground terminal
34
C
—
Connected to capacitor (for coupling)
35
NC
O
Not used (open)
36
BUS ON
O
Bus on/off control signal output to the MD mechanism controller (IC501) and SONY bus
interface (IC600) “L”: bus on
interface (IC600) “L”: bus on
37
AD ON
O
Power supply on/off control signal output for the A/D converter “L”: power on
38
DVCC
—
Power supply terminal (+5V) (for D/A converter)
39
DVSS
—
Ground terminal (for D/A converter)
40
LCDANG
O
Output signal for the LCD view angle adjustment “H”: When front panel is full open
41
VOL CE
O
Chip enable signal output to the electrical volume (IC300)
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
KEY IN0
I
Key input terminal (A/D input) OFF, SOURCE, SEEK/AMS
+ ) + = 0 – ,
SOUND, SHIFT, 1, 2, 3, 4 keys input (LSW801 to LSW804 and LSW806 to LSW811)
47
KEY IN1
I
Key input terminal (A/D input)
6, DSPL, LIST PTY, AF/TA, 10, 9, 8, 7, 6, 5 keys input (LSW812 to LSW821)
6, DSPL, LIST PTY, AF/TA, 10, 9, 8, 7, 6, 5 keys input (LSW812 to LSW821)
48
KEY IN2
I
Key input terminal (A/D input) Not used (fixed at “L”)
49
RC IN0
I
Rotary remote commander shift key A/D input terminal
TYPE A: MB90574PFV-G-113-BND
TYPE B: MB90F574PFV-G-113
TYPE B: MB90F574PFV-G-113
– 50 –
Pin No.
Pin Name
I/O
Function
50
D-BASS IN
I
D-BASS switch (LSW805) input terminal (A/D input)
51
NC
I
Not used (fixed at “L”)
52
MPDH (MTP)
I
Multi-path input from the RDS decoder (IC102)
53
S METER (VSM)
I
FM and AM (MW/LW) signal meter voltage detection input from the FM/AM tuner unit (TU1)
54
VCC
—
Power supply terminal (+5V)
55
AMP ATT
O
Muting control signal output to the power amplifier (IC500) “H”: muting on
56
AMP ON
O
Standby control signal output to the power amplifier (IC500) “L”: standby, “H”: amp on
57
ILL IN
I
Illuminate line detect signal input for the auto dimmer control Dimmer is present at input of “L”
58
LOCK IN
I
Mini-disc lock detection signal input from the MD mechanism controller (IC501) “H”: lock
59
EMPH ON
O
Emphasis control signal output to the D/A converter (IC202) “H”: emphasis on
60
AU ATT
O
Audio line muting on/off control signal output terminal “H”: muting on
61
AF ATT
O
RDS AF playing attenuate signal output terminal Not used (open)
62
TU ATT
O
Tuner signal (FM and AM) muting on/off control signal output “H”: muting on
63
VSS
—
Ground terminal
64
ACC IN
I
Accessory detect signal input terminal “L”: accessory on
65
AF SEEK
O
RDS AF seek control signal output terminal
66
NC
O
Not used (open)
67
DAVN
I
Data transmit completed detect signal input from the RDS decoder (IC102)
68, 69
NC
O
Not used (open)
70
RDS SI
I
Serial data input from the RDS decoder (IC102)
71
RDS CKI
I
Serial data transfer clock signal input from the RDS decoder (IC102)
72
RC IN1
I
Rotary remote commander shift key A/D input terminal
73
X1A
O
Sub system clock output terminal (32 kHz)
74
X0A
I
Sub system clock input terminal (32 kHz)
75
NC
O
Not used (open)
76
BU IN
I
Battery detect signal input from the SONY bus interface (IC600) and battery check circuit
“H”: battery on
“H”: battery on
77, 78
NC
O
Not used (open)
79
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”
80
TEL ATT
I
Telephone muting signal input terminal At input of “L”, the signal is attenuated by –20 dB
81
ST IN/MONO
I/O
82
SEEKOUT
O
Seek control signal output to the FM/AM tuner unit (TU1) (AM mode: used for IF count output,
SD request, AGC cut etc., FM mode: used for SEEK, BTM, AF playing SD speed up etc.)
SD request, AGC cut etc., FM mode: used for SEEK, BTM, AF playing SD speed up etc.)
83
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”
84
NC (MONO)
I
Not used (open)
85
PLL CE
O
PLL serial chip enable output to the FM/AM PLL (IC100)
86
HSTX
I
Hardware standby input terminal Not used (open)
87
MD2
I
Mode selection input terminal (fixed at “L”)
88
MD1
I
Mode selection input terminal (fixed at “H”)
89
MD0
I
Mode selection input terminal (fixed at “H”)
90
RESET
I
System reset signal input from the reset signal generator (IC801) and reset switch (S900)
“L” is input for several 100 msec after power on, then it changes to “H”
“L” is input for several 100 msec after power on, then it changes to “H”
91
VSS
—
Ground terminal
Input of FM stereo detection signal from FM/AM tuner unit (TU1), and output of forced
monaural control signal to FM/AM tuner unit (TU1) (Commonly used for stereo display input
and forced monaural output)
FM stereo detection at input of “L”, forced monaural at output of “L”
monaural control signal to FM/AM tuner unit (TU1) (Commonly used for stereo display input
and forced monaural output)
FM stereo detection at input of “L”, forced monaural at output of “L”
– 51 –
Pin No.
Pin Name
I/O
Function
92
X0
I
Main system clock input terminal (3.68 MHz)
93
X1
O
Main system clock output terminal (3.68 MHz)
94
VCC
—
Power supply terminal (+5V)
95
PW SEL
I
Power select switch (S700) input terminal “L”: on (operation mode), “H”: off (halt mode)
96
POL MONO
I
Polar monaural detection signal input terminal Not used (open)
97 to 99
NC
O
Not used (open)
100
BAND
(9K-10K)
I
Frequency select input terminal Not used (fixed at “H”)
101
NC
O
Not used (open)
102
RAMBU
I
103
NC
O
Not used (open)
104
LCD CE
O
Chip enable output to the liquid crystal display driver (IC801)
105
FLASH W
I
Fixed at “H” in this set
106
REIN0
I
Rotary encoder (EN801) input for volume/bass/treble/balance/fader control
107
REIN1
I
Rotary encoder (EN801) input for volume/bass/treble/balance/fader control
108
LAMP ON
(ILL ON)
O
109
PW ON
O
Main system power supply on/off control signal output to the BA3918 (IC800) “H”: power on
110
FM ON
O
FM system power supply on/off control signal output to the BA3918 (IC800) “H”: FM on
111
TUN ON
O
Tuner system power supply on/off control signal output to the BA3918 (IC800) “H”: tuner on
112 to 118
NC
O
Not used (open)
119
VSS
—
Ground terminal
120
NC
O
Not used (open)
Internal RAM reset detection signal input from the RN5VD23AA (IC802)
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
Power supply on/off control signal output terminal at the illumination and liquid crystal display
driver (IC801) “H”: power on
At power select switch (S700) on mode: “H” output at the accessory on
At power select switch (S700) off mode: “H” output at the power on
driver (IC801) “H”: power on
At power select switch (S700) on mode: “H” output at the accessory on
At power select switch (S700) off mode: “H” output at the power on
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