Sony CDX-C6850 Service Manual ▷ View online
– 21 –
Pin No.
Pin Name
I/O
Pin Description
56
AMP ON
O
Power amplifier power control output
57
TXT ON
O
Reset output to CD-TEXT decoder IC.
58
VOL ATT
O
Electric volume mute control output
59
NIL
—
Not used. (Open)
60
ATT
O
System attenuate control output
61
RC IN1
I
Rotary commander shift key input 1
62
TU ATT
O
Tuner attenuate output (Not used in this set.)
63
VSS
—
Ground
64
NIL
—
Not used. (Open)
65
SSTOP
I
IF counter result signal detection input of PLL.
66
TEST
I
Test mode initial setting detection input
67
DAVN
I
RDS IC data acquisition detection input (Fixed at “L” in this set.)
68
FM ON/AM ON
O
FM ON output
69
TU ON
O
Tuner power control output
70
SDA
I/O
I
2
C BUS serial data input/output
71
SCL
O
I
2
C BUS serial clock output
72
NOSE2
I
Front panel OPEN detection input (Not used in this set.)
73
X1A
O
Sub ceramic oscillator output (32 kHz)
74
X0A
I
Sub ceramic oscillator input (32 kHz)
75
SCOR
I
SCOR signal detection input
76
BU IN
I
Backup power detection input
77
DQSY
I
CD-TEXT data setting completion signal detection input
78
CD SENS
I
CD SENS signal detection input
79
KEY ACK
I
Key input acknowledge
80
TEL ATT
I
Telephone attenuate detection input
81
ST/MONO
I/O
Tuner stereo signal detection input/forced monaural output
82
SEEKOUT
O
SEEK output
83
SD IN
I
Signal detector input
84
WIDE
O
WIDE/NARROW select output (Not used in this set.)
85
NARROW
O
WIDE/NARROW select output (Not used in this set.)
86
HSTX
—
Hardware standby input (Connect to pin (º (RESET).)
87
MD2
—
Operation mode input (Connect to ground in this set.)
88, 89
MD1, 0
—
Operation mode input (Connect to VCC in this set.)
90
RESET
I
Reset input
91
VSS
—
Ground
92
X0
I
Main ceramic oscillator input (4.19 MHz)
93
X1
O
Main ceramic oscillator output (4.19 MHz)
94
VCC
—
Power supply pin (+5 V)
95
COM8V ON
O
COM 8V control output
96
NIL
—
Not used. (Open)
97
AREA1
I
Destination select input 1 (Fixed at “L” in this set.)
98
AREA2
I
Destination select input 2 (Fixed at “L” in this set.)
99
AREA3
I
Destination select input 3 (Fixed at “H” in this set.)
100
BAND
I
Not used in this set.
101
ACC IN
I
Accessory power detection input
102, 103
PH3, 2
I
Disc insertion detection photo sensor input (Not used in this set.)
104
LCD CE
O
LCD chip enable output
105
FLS W
I
Flash write input (Fixed at “H” in this set.)
106, 107
RE IN0, 1
I
Rotary encoder input
108
ILL ON
O
Illumination power control output
109
PW ON
O
System power control output
110
NIL
—
Not used. (Open)
111
ANT REM
O
ANT REMOTE power control output
– 22 –
Pin No.
Pin Name
I/O
Pin Description
112, 113
NIL
—
Not used. (Open)
114
CD LD
O
Loading motor control output (Loading direction)
115
CD EJ
O
Loading motor control output (Eject direction)
116
L SW
I
Sled limit switch detection input
117
IN SW/(PH1)
I
Disc insertion detection input
118
D SW
I
DOWN switch detection input
119
VSS
—
Ground
120
SELF SW/(IN SW)
I
Disc self store detection input
4-2. BLOCK DIAGRAM — CD SECTION —
– 23 –
– 24 –
CDX-C6850
43
41 44
14 RF
59 CLKO
57 XLTO
56 DATO
56 DATO
21
PCMD
20
LRCK
22
BCK
34
XTAI
50 XRST
DIGITAL SIGNAL
PROCESSOR
IC1
55 CNIN
54 SEIN
1
FOK
3
MDP
27
GFS
45
EXCK
46
SQSO
47
SQCK
49
SENS
51
DATA
52
XLAT
53
CLOK
SCOR
SBSO
WFCK
SERVO 5V
Q4, 6
Q3, 5
35 PD1
36 PD2
39 E
38 F
31
RFO
19
CLK
20
XLT
21
DATA
RF AMP, SERVO CONTROL
IC2
OPTICAL PICK-UP
KSS-521A
37 FE BIAS
SERVO 5V
PD
LD
RV1
FOCUS BIAS
RV4
FOCUS GAIN
LD DRIVE
Q2
1
FEO
2
FEI
16
SLO
22
XRST
23
C. OUT
24
SENS
25
FOK
6
FEO
13
TAO
34 PD
33 LD
Q1
16 CH2+
15 CH2-
18 CH1+
17 CH1-
19
CH1 IN
22
CH2 IN
24
CH3 IN
TRACKING
FOCUS
2
CH4 IN
FOCUS/TRACKING COIL DRIVE,
MOTOR DRIVE
IC3
13 CH3+
14 CH3-
M902
(SLED)
M901
(SPINDLE)
M903
(LOADING)
12 CH4+
11 COM
6
FWD
7
REV
4
CTL1
5
CTL2
10 CH5+
6
DIN
5
BCKIN
LRCIN
LRCIN
CLKO
12
VOUTL
VOUTR
R-CH
XTI
19
XTO
D/A CONVERTER
IC702
X700
16.9344MHz
MC/DM1
22
RSTB
30 DEEMPH
6
GFS
17 SQ SI
19 SQ CKO
78 CD SENCE
SYSTEM CONTROL
IC801(1/2)
SERVO 5V
M
M
M
I-V
CONV.
4
DATA25
3
XLAT25
28 CLOK25
75 SCOR
5
XRST
2
FOK
23 C IN
1
LD ON
57 TXT ON
27 TXT CKO
25
77 DQSY
3
SCOR
5
MCK
1
EXCK
2
SBSO
4
WFCK
6
11
12
13
XMODE
SCLK
SRDT
DQSY
CD TEXT DECODER
IC703
115 CD EJ
114 CD LD
PH3
CD 5V
REG
Q909
MD 8V
REG
Q912
MD 8V
SWITCH
Q910, 911
CD POWER
SWITCH
Q907,908
120
117
116 L SW
118 D SW
CD ON
32
35
MD ON
SW2
(SELF)
CD+5V
MD 8V
MAIN
SECTION
1
Signal path
: CD
: CD
SW3
(LIMIT)
SW1
(DISC IN)
SW4
(DOWN)
04
BATT+B
BATT+B
COM 8V
SWITCH
SWITCH
Q913, 919
COM 8V
REG
Q904
REG
Q904
COM+8V
COM8V ON
95
SELF SW/(IN SW)
IN SW/(PH1)
TXT SI
102
9
17
1
20
4
4-3. BLOCK DIAGRAM — MAIN SECTION —
CDX-C6850
– 25 –
– 26 –
-3
L
1
3
19
17
18
3
2
1
1
1
2
18
12
16
13
11
21
20
22
19
83
81
53
9
10
6
6
14
15
25
24
5
4
CNJ600
(ANT)
AM ANT
FM L-CH
FM R-CH
SEEK
AM IF
FM IF
VCO
SD
ST-IND
S-METER
TU+B
FM+B
AM+B
VT
LO/DX
AM DET
FM ANT
TUNER ASSY
TU601
R-CH
R-CH
R-CH
Signal path
: FM
: AM
: CD
: FM
: AM
: CD
CD
SECTION
PJ400
R-CH
R
-1
-2
BUS AUDIO IN
L
11
12
1
28
TONE
22
20
2
7
13
12
ELECTRONIC VOLUME
IC401
26
25
24
PDL
SE3L
SE2L
SE1L
SCL
SDA
MUTE
OUT FL
OUT RL
SYSTEM CONTROL
IC801(2/2)
58
104
14
13
90
61
49
37
101
109
47
48
12
15
60
FM+B
SWITCH
Q610,615
SWITCH
Q901,902
ILL+B REG
Q903
D-BASS
SWITCH
S501
ROTARY
ENCODER
RE501
12
13
16
71
70
65
28
9
PLL
IC601
IF FM
AM IN
SCL
SDA
SSTOP
FM IN
LPOUT
LCL/DX
X601
10.25MHz
29
13
2
10
3
11
4
9
8
6
12
1
22
21
36
76
20
46
79
106
107
BUS INTERFACE
IC803
RST
BATT
CLK
CLK
DATA
BUS ON
RES IN
BATT CHECK
CLK IN
DATA IN
DATA OUT
BUS ON
7
2
5
6
4
BATT+B
D807
LCD DRIVE
IC501
LCD-CE
LCD-CLK
LCD-DATA
LCD501
AMBER LED
SWITCH
Q503,505
GREEN LED
SWITCH
Q504,506
U COM 5V
+B
BATT+B
RESET
IC902
S900
RESET
CNP802
(REMOTE IN)
(REMOTE IN)
KEY MATRIX
LSW512-521,531,532,534-538
(KEY BOARD)
KEY ACTIVE
Q914,915
LED510
LED511
LED511
LAMP
SWITCH
Q502, 505
LSW532, 536
LED501-504
TEL MUTE
SWITCH
Q916
POWER SUPPLY
IC901
AMP ON
VCC
AMP+B
BATT+B
BATT+B
ACC
CHECK
Q905
F901
11
3
12
4
10
2
9
1
13
TEL MUTE
16
BATT
7
ACC
5
AMP REM
6
ANT REM
15
TEST
SCL
X1A
X0A
SDA
SSTOP
SD IN
ST/MONO
S-METER
KEY IN0
SYSRST
UNI CK
UNI SO
UNI SI
UNI SI
BUS ON
BU IN
BU IN
AD ON
KEY ACK
RE IN0
RE IN1
ACC IN
TEL ATT
KEY IN1
KEY IN2
RC IN1
RC IN0
RESET
108 LAMP ON
LCD CKO
LCD SO
DIM
AMBER
GREEN
LCD CE
ANT REM
AMP ATT
BEEP
Q402
ATT
VOL ATT
PW ON
TEST
FLS SI/NOSE1
Q110
Q401
Q111
LINE AMP
IC402
INFL
INRL
OUTFL
OUTRL
12
11
5
3
9
7
POWER AMP
IC200
22 4
FL
RL
MUTE
STBY
-6
REAR
R
-5
L
-4
FRONT
R
R-CH
R-CH
PJ401
PJ400
R-CH
CNP501
FL+
FL-
RL+
RL-
FR+
FR-
RR+
RR-
31
AMP ON 56
111
80
BATT+B
D918
D919
LINE OUT
92
93
X800
4.19MHz
X0
X1
73
74
X801
32kHz
D909
BATT+B
BU CHECK
Q906
ANT REM
SWITCH
Q924,925
66
1
2
4
IF AM
SEEK
10
9 OSC IN
OSC OUT
1
2
3
LP FM
LP HC
LP AM
TU+5V REG
Q613
TU+B
SWITCH
Q603,609
TU+5V
COM+8V
68 FM ON/AM ON
AM+B
SWITCH
Q612
86 HSTX
69 TU ON
8
D910
3
CNP801
(BUS CONTROL IN)
IR
RECEIVER
IC502
Q806
PULL UP 5V
04
24
SIRCS
LED506
(CD WINDOW)
SUB+B
LSW511
LED507
LED507
-3
-4
L
R
Q403
2
3
1
IC406
18
17
SUBOUT+
SUBOUT-
S901
NOSE DET
72
NOSE2
4
LED DRIVE
Q507
COM+B
LSW512-521,531,534,
535,537,538
POWER-ON
41
ANGLE
SWITCH
Q802,803
11
10
7
9
VLCD
VLC1
VLC2
VLC3
VLC3
VLC4
6
VLC5
8
NARROW
SWITCH
Q608,616
24
84
WIDE
SWITCH
Q617
85
WIDE
NARROW
WI/NA
SUB OUT
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