Sony CDX-4180R / CDX-4180RV Service Manual ▷ View online
– 21 –
CD SECTION
Note:
1. CD Block basically constructed to operate without adjustment.
1. CD Block basically constructed to operate without adjustment.
Therefore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use the oscilloscope with more than 10 M
3. Use the oscilloscope with more than 10 M
Ω
impedance.
4. Clean an objective lens by an applicator with neutral detergent
when the signal level is low than specified value with the following
checks.
checks.
Focus Bias Adjustment
Setting: This adjustment is performed with the set placed
horizontally.
Focus Gain Adjustment (Coarse adjustment)
This adjustment is not required unless the following parts are replaced:
•
•
Optical pick-up
•
RV4
Procedure:
1. Set RV4 to the standard position. (mechanical center)
2. Check whether operation noise (while noise type) caused by
1. Set RV4 to the standard position. (mechanical center)
2. Check whether operation noise (while noise type) caused by
the 2-axis device (lens section of the optical pick-up) is
abnormally loud.
If the operation noise is too loud, turn RV4 slightly counter-
clockwise.
abnormally loud.
If the operation noise is too loud, turn RV4 slightly counter-
clockwise.
•
If the gain is too low:
Focus does not function and no music is selected.
Focus does not function and no music is selected.
•
If the gain is too high:
Noise caused by scratches and dust is heard and the operation
becomes unstable.
Noise caused by scratches and dust is heard and the operation
becomes unstable.
Adjustment Location: servo board
Adjustment Location: servo board (component side)
Procedure:
1. Connect an oscilloscope between TP (RF) and TP (RF. GND)
1. Connect an oscilloscope between TP (RF) and TP (RF. GND)
on the SERVO board.
2. Connect the power supply.
3. Push the RESET button (S900) on the MAIN board.
4. Insert the disc (YEDS-18) and playback.
5. Adjust RV1 so that the oscilloscope waveform is clear and check
3. Push the RESET button (S900) on the MAIN board.
4. Insert the disc (YEDS-18) and playback.
5. Adjust RV1 so that the oscilloscope waveform is clear and check
RF signal level is correct or not.
Note: Clear RF signal waveform means that the sharp “
≈
” can be
clearly distinguished at the center of the waveform.
• When observing the eye pattern, set the oscilloscope to AC range
and raise the vertical sensitivity so that it may be easily seen.
Adjustment Location: servo board
SERVO board
oscilloscope
TP (RF)
TP (RF. GND)
RF signal waveform
VOLT/DIV: 200 mV
TIME/DIV: 500 nS
TIME/DIV: 500 nS
level: 1.0 – 1.5 Vp-p
CN2
RV1
FOCUS BIAS ADJ
TP
(RF. GND)
FOCUS GAIN ADJ
RV4
TP
(RF)
IC1
IC3
IC2
CN1
CN3
– 22 –
4-1. IC PIN DESCRIPTION
• IC801 MB90574FPV-G-110 (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
LD ON
O
Laser power ON/OFF control pin
2
FOK
I
Focus signal detection input
3
XLAT25
O
CD signal process latch output
4
DATA25
O
CD signal process serial data output
5
XRSRO
O
CD signal process IC reset output
6
GFS
I
GFS signal detection input
7
NIL
—
Not used. (Contact to GND.)
8
VCC
—
Power supply (+5 V)
9
PLL SI
I
PLL data input
10
PLL SO
O
PLL data output
11
PLL CKO
O
PLL CLK output
12
NOSE
I
Front panel connect detection input
13
LCD SO
O
LCD serial data output
14
LCD CKO
O
LCD serial clock output
15
BEEP
O
Buzzer control output
16
DBMOD2
O
D-BASS mode set signal output
17
SQSI
I
SUBQ data input
18
NIL
—
Not used. (Contact to GND.)
19
SQCKO
O
SUBQ read clock output
20
UNI SI
I
BUS system serial interface input
21
UNI SO
O
BUS system serial interface output
22
UNI CKI/O
I/O
BUS system serial interface input/output
23
C OUT
I
CD track jump number count input
24
SIRCS
I
Remote commander input
25
SRDT
I
CD-TEXT data input
26
NIL
—
Not used. (Contact to GND.)
27
SCLK
O
CD TEXT data read clock output (Not used.)
28
CLOCK25
O
CD signal process serial clock output
29
SYSRST
O
System reset control output
30
DEEM
O
Emphasis control output
31
DBMOD1
O
D-BASS mode set signal output
32
MD ON
O
Machanism deck section power supply control output
33
VSS
—
GND
34
C
—
Capacitor terminal for power supply
35
CD ON
O
CD power supply control output
36
BUS ON
O
BUS ON control output (Not used.)
37
AD ON
O
Power control output for A/D conversion
38
DVCC
—
Power supply for D/A convertor
39
DVSS
—
GND for D/A convertor
40
TEST
I
Test mode direct setting input
41
VOL CE
O
Electric volume serial chip enable output
42
AVCC
—
Power supply for analog circuit
43
AVRH
—
Power supply for A/D convertor
44
AVRL
—
Power supply for A/D convertor
45
AVSS
—
GND for analog circuit
46
KEY IN0
I
Key input
47
KEY IN1
I
Key input
48
KEY IN2
I
Key input for D-BASS rotary switch
49
RC IN0
I
Rotary commander input
50, 51
NIL
—
Not used. (Contact to GND.)
52
MPDH
I
Tuner multi-path input
SECTION 4
DIAGRAMS
– 23 –
Pin No.
Pin Name
I/O
Pin Description
53
S-METER
I
S-meter voltage detection input
54
VCC
—
Power supply
55
AMP MUTE
O
Power amplifier mute control output
56
AMP ON
O
Power amplifier power control output
57
XMODE
O
Reset signal output for CD-TEXT decoder (Not used.)
58
VOL SO
O
Electric volume serial data output
59
VOL CKO
O
Electric volume serial clock output
60
AU MUTE
O
Audio mute signal output
61
AF MUTE
O
RDS mute signal output (Not used.)
62
TU MUTE
O
Tuner mute signal output
63
VSS
—
GND
64
ACC IN
I
Accessory power voltage detection input
65
AFSEEK
O
RDS operation control output
66
M SIO
I/O
EEPROM serial data input/output (Not used.)
67
DAVN
I
RDS data input detection input
68
M CK
O
EEPROM serial clock output (Not used.)
69
M CE
O
EEPROM chip enable output (Not used.)
70
RDS SI
O
RDS serial data input
71
RDS CKI
O
RDS serial clock input
72
RC IN1
I
Remote commander shift key input
73
X1A
—
Low frequency oscillator input
74
X0A
—
Low frequency oscillator input
75
SCOR
I
SCOR signal detection input
76
BU IN
I
Back-up power supply detection input
77
DQSY
I
CD-TEXT data set complete signal detection input (Not used.)
78
CD SENCE
I
CD SENS signal detection input
79
KEY ACK
I
Key input acknowledge
80
TEL MUTE
I
Telephone mute detection input
81
ST IN/MONO
I
Tuner stereo signal detection input
82
SEEKOUT
O
SEEK OUT output
83
SD IN
I
Signal detection input
84
NC
—
Not used. (Contact to GND.)
85
PLL CE
O
PLL CE output
86
H
I
Hardware standby input
87
VSS
—
GND
88, 89
VCC
—
Power supply
90
RESET
I
Reset input
91
VSS
—
GND
92
X0
—
High frequency oscillator input
93
X1
—
High frequency oscillator input
94
VCC
—
Power supply
95
PW SEL
I
Power select initial setting input
96
NIL
—
Not used. (Contact to GND.)
97
AREA1
I
Fixed to “L”.
98
AREA2
I
Fixed to “L”.
99
AREA3
I
US, Canadian model : Fixed to “L”. E model : Fixed to “H”.
100
BAND (9K 10K)
I
AM/FM frequency select (E model)
101
NIL
—
Not used. (Contact to GND.)
102
PH3
I
Disc insert detection photo sensor input (Not used.)
103
PH2
I
Disc insert detection photo sensor input (Not used.)
104
LCD CE
O
LCD chip enable output
105
NIL
—
Not used. (Contact to GND.)
106
RE0
I
Rotary encoder input
– 24 –
Pin No.
Pin Name
I/O
Pin Description
107
RE1
I
Rotary encoder input
108
LAMP ON
O
Illumination power control output
109
PW ON
O
System power control output
110
REGMOD1
O
FM power control output
111
REGMOD2
O
System power control output
112
CTL1
O
Laser power ON/OFF control output (Not used)
113
CTL2
O
Laser power ON/OFF control output
114
FWD
O
Loading motor control output (Loading)
115
REV
O
Loading motor control output (Eject)
116
L SW
I
SLED limit switch detection input
117
IN SW
I
Disc insert detection input
118
D SW
I
DOWN switch detection input
119
VSS
—
GND
120
SELF SW
I
SELF switch detection input
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