Sony MDX-C8900 Service Manual ▷ View online
– 25 –
– 26 –
AM Auto Scan/Stop Level Adjustment
Setting:
Band: AM
FREQUENCY SELECT switch (E model): AM 10 k
FREQUENCY SELECT switch (E model): AM 10 k
Procedure:
1. Set to the test mode. (See page 23.)
2. Push the
1. Set to the test mode. (See page 23.)
2. Push the
[SOURCE]
button and set to FM.
3. Push the
[MODE]
button and set to AM.
Display
4. Adjust the volume RV1 on TU1 by turning clockwise untill
“0” is shown next to “AM” on the display window, If “0” is
already shown or the volume RV1 has been turned too far,
turn it back counterclockwise untill “0” is disappeared once,
then try this adjustment.
already shown or the volume RV1 has been turned too far,
turn it back counterclockwise untill “0” is disappeared once,
then try this adjustment.
Display
AM RF signal
generator
Carrier frequency : 1000 kHz
30% amplitude
modulation by
1 kHz signal
Output level
30% amplitude
modulation by
1 kHz signal
Output level
: 33 dB (44.7
µ
V)
(50
Ω
)
set
AM dummy antenna
30
Ω
15 pF
65 pF
antenna jack (CNP1)
Adjustment Location:
– SET UPPER VIEW –
SHUF
SHUF
TU1
RV1 AM Auto Scan/Stop Level Adjustment
RV2 FM Auto Scan/Stop Level Adjustment
RV3 FM Stereo Separation Adjustment (Wide)
RV4 FM Stereo Separation Adjustment (Narrow)
Front
MDX-C8900
– 27 –
– 28 –
4-1.
BLOCK DIAGRAM – MD SERVO Section –
SECTION 4
DIAGRAMS
F
C
B
D
A
E
I
J
J
I
B
A
C
D
D
E
F
DETECTOR
1
2
J
I
4
5
6
7
A
B
C
D
D
8
9
E
F
LD
PD
LASER DIODE
ILCC
PD
OPTICAL PICK-UP
(KMS-241A/J2N)
AUTOMATIC
POWER
CONTROL
Q302
11
10
APC
PD
LD/PD
AMP
12
APCREF
I-V
AMP
I-V
AMP
AT
AMP
B.P.F.
29
30
WBL
ADFM
ADIN
32
ADFG
ABCD
AMP
FOCUS
ERROR AMP
TRACKING
ERROR AMP
35
34
26
28
ABCD
FE
TE
SE
V-I
CONVERTER
20
F0CNT
WBL
3T
EQ
+3.3V
SERIAL/
PARALLEL
CONVERTER,
DECODER
COMMAND
17
16
18
SWDT
SCLK
XLAT
RF AMP
B.P.F.
46
RFO
40
RF AGC
& EQ
AGCI
EQ
38
RF
RF AMP,
FOCUS/TRACKING ERROR AMP
IC302
TEMP
48 47
MORFO
MORFI
3T
PEAK &
BOTTOM
WBL
33
AUX
73 62
37
PEAK
36
BOTM
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC303
6
8
OUT4F
OUT4R
M
M901
(SPINDLE)
27
25
OUT2F
OUT2R
M
M902
(SLED)
21
23
OUT1F
OUT1R
12
10
OUT3F
OUT3R
FCS+
FCS–
TRK+
TRK–
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
3
4
IN4R
IN4F
29
30
IN2F
IN2R
19
18
IN1F
IN1R
14
15
IN3F
IN3R
SPFD
SPRD
IC306
92
91
88
89
86
85
83
APCREF
SFDR
SRDR
FFDR
FRDR
TFDR
TRDR
16
PSB
PWM GENERATOR
AUTOMATIC
POWER
CONTROL
DIGITAL
SERVO
SIGNAL
PROCESS
74
65
64
75
66
63
ANALOG MUX
A/D CONVERTER
AUTO
SEQUENCER
13
FROM CPU
INTERFACE
DIGITAL SERVO
SIGNAL PROCESSOR
IC301 (2/2)
RECP
PEAK HOLD
Q301
+3.3V
ABCD
AUX1
AUX2
ABCD
FE
TE
SE
PEAK
BOTM
81
80
82
XLRF
CKRF
DTRF
EFM/ACIRC
ENCODER/DECODER
SHOCK PROOF
MEMORY CONTROLLER
ATRAC
ENCODER/DECODER
PLL
FILTER
59
58
61
60
FILI
PCO
CLTV
FILO
100
EFMO
23
ADDT
IC301 (1/2)
15
TX
COMPA-
RATOR
51
52
55
ASYO
ASYI
RFI
ADIP
DEMODULATOR/
DECODER
78
ADFG
SPINDLE
SERVO
79
F0CNT
94 93
SPFD
SPRD
SUBCODE
PROCESSOR
24
SAMPLING
RATE
CONVERTER
DIGITAL
AUDIO
INTERFACE
22
21
DIN
DOUT
DIGITAL SIGNAL PROCESSOR,
EFM/ACIRC ENCODER/DECODER,
SHOCK PROOF MEMORY CONTROLLER,
ATRAC ENCODER/DECODER, 2M BIT D-RAM
IC301 (1/2)
DADT
INTERNAL BUS
D-RAM
CLOCK
GENERATOR
25
26
27
512FS OSC
IC304
XBCK
LRCK
FS256
BCK
LRCK
FS256
X301
22.5792MHz
22.5792MHz
16
OSCI
17
OSCO
CPU
INTERFACE
MONITOR
CONTROL
CONTROL
10
XRST
12
DQSY
11
SQSY
14
XINT
9 8
5 6 7
SENS
SRDT
SWDT
SCLK
XLAT
LEVEL SHIFT
IC502
5
13
3 1
6
12
4 2
LEVEL SHIFT
IC503
1
2
3
4
MNT0
MNT1
MNT2
MNT3
13
1
3
5
12
2
4
6
FOK
SHOCK
XBUSY
SLOCK
SWDT
SCLK
XLAT
59
62
55
54 52
45 51 64
26 27 28 29
MNT0
MNT1
MNT2
MNT3
21
LOCK
39
TEMP
MD-RST
SQSY
CC-XINT
SENS
MD-SI
MD-SO
MD-CKO
MD-LAT
7
6
EJECT
LOAD
5
4
05
1
7
M
RIN
FIN
OUT1 OUT2
LOADING
MOTOR DRIVE
IC305
M903
(LOADING)
63
C-SW
LOADING START/
EJECT END
EJECT END
E-SW
LIMIT-IN
(LIMIT)
LOADING
END
END
ON: When the disc loading start
and the disc eject completion.
ON: When completion of
the disc loading.
ON: When the optical pick-up is
inner position.
31
32
EXTAL
XTAL
X501
10MHz
TH501
66
DEEMP
47, 46, 48, 49
1, 2, 24, 25
D0 – D3
32 – 29, 34 – 38, 43
9 – 12, 14 – 18, 5
A0 – A9
D0 – D3
A00 – A09
41
22
45
3
44
4
42
23
XOE
XWE
XRAS
XCAS
OE
WE
RAS
CAS
D-RAM
IC307
(Page 29)
A
DADT, BCK, LRCK, FS256
(Page 29)
C
LOCK
(Page 29)
B
EMPHASIS
MD MECHANISM CONTROLLER
IC501 (1/2)
• SIGNAL PATH
: MD PLAY
11
56
RESET, EMPHASIS
RESET
– 29 –
– 30 –
MDX-C8900
4-2.
BLOCK DIAGRAM – MAIN Section –
AUX-IN-L
MD-IN-L
FM-IN-L
AM-IN-L
1
4
2 FM-ANT
AM-ANT
6
VCO
21
FM-IF
11
AM-IF
5
9 16
13
6
1
5
20
4 2
25
26
27 28
18
7
VT
24
DOUT
DIN
CLK
X IN
X OUT
CE
PLLSI
104 LOCK
PLLSO
PLLCKO
PLLCE
1
53
VSM
20
SD-IN
4
ST-MONO
5
TU-ATT
98
BBE
99
LO
67
VOLCKO/SUBCKO
66
VOLSO/SUBSO
68
SUBCE
64
VOLCE
CLK
DATA
SUBCE
VOLCE
100
PRO
BBE
CONTOUR
PROCESS
62
SUB-SW0
61
SUB-SW1
CSV-NAR
CSV-SO
CSV-CKO
CSV-CE
65
ATT
57
79
TEL-ATT
58
118
LED-ON
FM OSC
15
AM OSC
IFIN
PD1
NARROW
13
SEEK
19
S-METER
20
SD
22
18
16
12
ST/MONO
FM L-OUT
FM R-OUT
AM
DET
LOW-PASS
FILTER
Q6
LOW-PASS
FILTER
IC100
LOW-PASS
FILTER
IC411
MIX AMP
IC401
CENTER VOLTAGE
GENERATOR
(FOR BIAS)
IC402
LINE
DRIVER
IC200
BUFFER
IC404
X1
7.2MHz
X502
4MHz
FM/AM PLL
IC4
05
• SIGNAL PATH
: MD PLAY
: FM
: AM
MUTING
Q9
MUTING
Q11
MUTING
CONTROL SWITCH
Q12
SUB CUT
SWITCH
Q206, 207
R-CH
R-CH
R-CH
D500
D7
R-CH
C
(Page 28)
LOCK
D
(Page 34)
LED-ON
FM/AM TUNER UNIT
TU1
MASTER CONTROLLER
IC500 (1/3)
+
LO/DX
LO/DX
FM/AM SIGNAL
METER BUFFER
Q5
SEEKOUT
41
42
40
39
20
INL
VOLUME
CONTROL
CIRCUIT
VOLUME
CONTROL
CIRCUIT
LOUDNESS
CONTROL
CIRCUIT
TONE
CONTROL
CIRCUIT
FADER
CONTROL
CIRCUIT
INPUT
SELECTOR
SWITCH & BUFFER
CIRCUIT
31
30
VR1
IN
IN
VOUT1
14
33
32
INAO1
OUTL
26
25
12
13
8
1
17
TIN1
20
17
INP1
BUFFER
23 AOUT
22 NAR
15 DATA-IN
14 CLK
14 CLK
8 CE
20
16
VRIN1
INAO1
15
OUT1
FDIN1
FL+
1
ZC
DET
LPF
BPF
HPF
SHIFT
REGISTER &
LATCH
BBE/BYPASS
CONTROL
CIRCUIT
23
12
13
24
FNTO1
VCT
REO1
OUTL
OUTR
INL
INR
12
14
5
3
OUT2+
OUT2–
21
23
OUT4+
OUT4–
IN2
IN4
11
9
7
OUT1+
OUT1–
IN1
15
22
17
19
OUT3+
OUT3–
IN3
MUTE
4
STBY
8
1
OUTL
OUTR
INL
INR
TCO1
16 21 22
DATA
CLK
CE
CLK
DATA
VOLCE
NOISE
SHAPER
INPUT
INTERFACE
D/A
CONVERTER
MODE
CONTROL
CLK
CONTROL
DIGITAL FILTER,
D/A CONVERTER
IC101
(L)
(R)
12
9
VOUTL
VOUTR
R-CH
R-CH
R-CH
MUTING
Q200
8
9
9
10
PROCESS
CONTOUR
BBE
MUTING
Q300
BATTERY OFF
MUTE DRIVER
Q400
MUTING
CONTROL SWITCH
Q401
MUTING
CONTROL SWITCH
Q402
R-CH
R-CH
R-CH
R-CH
LEVEL
SHIFT
Q509
BUSY
3
XT
2
XT
17
117 21 22 23 9
RESET
6
5
4
1
15
17 16
DATA
BCK
LRCK
XTI
RSTB
DM1
DM0
BCK
DADT
LRCK
FS256
A
(Page 28)
DADT,
BCK,
LRCK,
FS256
BCK,
LRCK,
FS256
B
(Page 28)
EMPHASIS
CNP500 (2/2)
(POWER CONNECTOR)
POWER AMP
IC600
GROUND ISOLATION
(FOR FRONT)
IC801
SW400 (2/8)
SW400 (3/8)
SW400 (7/8)
SW400 (6/8)
SW400 (4/8)
SW400 (8/8)
GROUND ISOLATION
(FOR REAR)
IC802
INPUT SELECT,
ELECTRICAL VOLUME
IC400 (1/3)
ELECTRICAL VOLUME
IC400 (2/3)
ELECTRICAL
VOLUME
IC400 (3/3)
ELECTRICAL VOLUME
(FOR SUBWOOFER)
IC403
SOUND ENHANCEMENT
AUDIO PROCESSOR
IC409
CSV
IC502
DIGITAL
FILTER
RESET,
EMPHASIS
EMPHASIS
RESET
SHIFT
REGISTER &
LATCH
8
1
2
7
9 7
DATA
CLK
CE
CLK
DATA
SUBCE
COM +8V
BATT B+
R-CH
R-CH
Q403
CSV BUSY SWITCH
IC405
FL–
9
FR+
4
FR–
12
RL+
2
RL–
10
RR+
3
RR–
11
TEST MODE
13
TEL-MUTE
15
COM +8V
CNP1
ANT
8
FM +B
FM B+
10
AM +B
AM B+
TUNER B+
9
+B (FM/AM)
WIDE/NARROW
SWITCH
Q13
3
WIDE
Q14
WIDE/NARROW
SWITCH
FORCED WIDE/
NARROW
D406
D405
D407
D402
D403
D801
D802
CN802 (1/2)
BUS
AUDIO IN
CN801 (1/2)
FRONT
LINE IN/OUT
(L)
(R)
CN801 (2/2)
REAR
LINE IN/OUT
SW400
LINE OUT/IN
SELECT
SW400
LINE OUT/IN
SELECT
(L)
(R)
CN802 (2/2)
SUB EQ OUT
(L)
(R)
+
MUTING
Q201
MUTING
Q301
MUTING
Q202
MUTING
Q801
MUTING
Q802
MUTING
Q803
MUTING
Q804
SW400 (1/8)
SW400
LINE OUT/IN
SELECT
1 (OFF)
2 (ON)
1 (OFF)
2 (ON)
1 (OFF)
2 (ON)
MUTING
Q203
TESTIN
EQ-SEL
CSV-RST
MDX-C8900
– 31 –
– 32 –
4-3.
BLOCK DIAGRAM – DISPLAY/KEY CONTROL Section –
Q903
LSW900, 901, 903,
LSW904, 906 – 909,
LSW912 – 918
LED900 – 907,
LSW902, 905
05
35
RE-IN1
KEYACK
AMBER
76
12
BEEP
15
LCDANG
41
2
LCD-DATA
18
LCD-CLK
17
21
20
LCD-CE
OSC-OUT
OSC-IN
19
KEYIN1
RE-IN0
36 37
KEYIN0
X1
X0
X1A
X0A
RC-IN0
RC-IN1
46
47
48 72
93
92
73
LCD SO
13
LCD CKO
14 16
LCD-INH
14
LCD CE
32
74
DSTSEL2
51
KEY ACTIVE
SWITCH
Q523
BUZZER
DRIVE
Q526
OSC
D503
VOL+
VOL–
D505
Q902
VLC0 – VLC5
GREEN
1
LED DRIVE
Q900
CONTRAST
SWITCHING
Q503, 504
AD-ON
80
NOSESW
DOORSW
E
(Page 34)
DOOR SW
LSW701, 900 – 909,
LSW912 – 918,
S900
SW503
(NOSE DETECT)
ROTARY
ENCODER
RE900
BACKUP +5V
CN900
FRONT PANEL SIDE
BZ501
(BUZZER)
CN500
MAIN BODY SIDE
P-ON +10V
LCD +10V
LCD +10V
11
10
LED DRIVE
Q901
11 – 6
X500
3.68MHz
X501
32kHz
E MODEL
R952
MASTER CONTROLLER
IC500 (2/3)
LIQUID CRYSTAL DISPLAY DRIVER
IC900
26 – 90
SEG101 – SEG165
100 – 93
COM100 – COM107
LIQUID CRYSTAL DISPLAY
LCD900
VOLUME/BASS/TREBLE/
BALANCE/FADER CONTROL
RE900
CNJ500
REMOTE IN
LCDINH
SW501
(FREQUENCY SELECT)
FM 200k/AM 10k
FM 50k/AM 9k
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