Sony CDX-C460 / CDX-C560 Service Manual ▷ View online
– 25 –
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 MΩ impedance.
4. Clean an objective lens by an applicator with neutral detergent
3. Use the oscilloscope with more than 10 MΩ 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.
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:
•
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 the
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.
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) on
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 (SW901) 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 (SW901) 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.
RF signal waveform
•
When observing the eye pattern, set the oscilloscope to AC range
and raise the vertical sensitivity so that it may be easily seen.
and raise the vertical sensitivity so that it may be easily seen.
Adjustment Location : servo board
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
SERVO board
oscilloscope
TP (RF)
TP (RF GND)
CN1
CN3
– 26 –
SECTION 4
DIAGRAMS
4-1. IC PIN DESCRIPTIONS
• IC601 µPD784035 (MAIN SYSTEM CONTROL)
• IC601 µPD784035 (MAIN SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
UNICKI
I
Serial clock input
2
UNISO
O
Serial data output
3
BUSON
O
BUS ON control output
4
UNICKO
O
Serial data output
5
WR
O
PIO write strobe output
6
BEEP
O
BEEP control output
7
RESET
I
Reset input
8
VDD
—
Power supply pin (+5 V)
9
X OUT
O
System clock output (22 MHz)
10
X IN
I
System clock input (22 MHz)
11
VSS
—
GND for microcomputer.
12 – 19
D0 – 7
I/O
PIO data input/output D0 – 7
20
EMPH
O
Emphasis control output
21
RD
O
PIO read strobe output
22
CDMON
O
CD mechanism power control output
23
LINK-OFF
O
Link off output (Fixed at “L” (C560).)
24
CD LAT
O
CD signal process latch output
25
CD SO
O
CD signal process serial data output
26
CD CKO
O
CD signal process serial clock output
27
CD RST
O
CD signal process IC reset output
28
F OK
I
Focus OK signal detection input
29
GFS
I
GFS signal detection input
30, 31
CTL1, 2
O
Driver IC control output 1, 2
32
LM EJ
O
Loading motor control output (Eject direction)
33
LM LOD
O
Loading motor control output (Loading direction)
34
PLLSI
I
PLL data input
35
PLLCKO
O
PLL clock output
36
ACC IN
I
Accessory power voltage detection input
37
TEST
I
TEST mode direct setting input
38
PLLCE
O
PLL chip enable output
39
PLLSO
O
PLL data output
40
SQ SI
I
Sub Q data input
41
SQ CKO
O
Sub Q clock output
42
AD-ON
O
Power control output for A/D conversion.
43
VOL-CE
O
Electric volume serial chip enable output
44
TIMCE
O
Calendar clock chip select output
45
GND
—
GND for microcomputer.
46
GND.
—
Connect to GND.
47
CS
O
PIO chip select output
48
LCDCE
O
LCD serial chip enable output
49
LCDCKO
O
LCD serial chip clock output
50
NOSESW
I
Detachable panel detection
51
LCDSO
O
LCD serial chip data output
52
ST/MONO
I/O
Used inconjunction with ST indicator input/force MONO output.
53
PW ON
O
System power control output
54
RAM-BU
I
RAM reset detection input
– 28 –
Pin No.
Pin Name
I/O
Pin Description
55
VDD.
—
Power supply pin (+5 V)
56, 57
KEY IN0, 1
O
KEY input 0, 1
58
RC IN0
I
Rotary commander 0
59
VSM
I
MW/SW, FM S-meter voltage detection input
60
D-BASSIN
I
D-BASS rotary switch input (C460)
61
RC IN1
I
Rotary commander 1
62
SD-IN
I
Signal detector input
63
SYS-RST
O
System reset control output
64
AD+B
I
Power supply for A/D converter.
65
AVREF(AD)
I
Reference voltage for A/D converter.
66
AVSS
—
GND for A/D converter.
67
VOL CKO
O
Electric volume serial clock output
68
VOL SO
O
Electric volume serial data output
69
AVREF(DA)
—
Reference voltage for D/A converter.
70
AVREF(DA).
—
Connect to GND.
71
BU IN
I
Back-up power detection input
72
SIRCS
I
Remote commander input
73
CNIN
I
Track jump number count input
74
SENS
I
SENS signal detection input
75
WT INT
I
Calendar clock timing pulse detection input
76
KEYACK
I
KEY input acknowledge (WAKE UP)
77
SCOR/SELF SW
I
SCOR signal detection input
78
UNISI
I
Serial data input
79, 80
A1, 0
O
PIO address output
– 28 –
• IC651
µ
PD71055GB-10-3B4 (SUB SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
NC
—
Not used.
2
CS
I
Chip select input
3
GND
—
GND
4, 5
A1, 0
I
Address input A1, 0
6
L SW
I
Sled limit switch input
7
IN SW
I
Disc insert detection input
8
D SW
I
DOWN switch detection input
9
PW SEL
I
Power select initial setting
10
CD-ON
O
CD power control output
11
A-MUT
O
Audio mute control output
12
AMP-M
O
Power amplifier mute control output
13
DIMMER
O
DIMMER control output (Not used.)
14 – 16
D-BASS CONT3, 1, 2
O
D-BASS select control output (C460)
17
NC.
—
Not used.
18
COLOR
O
Illumination color select control output
19
B-CUT
O
Power amplifier boost control output
20
FM ON
O
FM-ON output
21
TU ON
O
TUNER-ON output
22
ILL ON
O
Illumination power control output
23
VDD
—
Power supply pin (+5 V)
24 – 31
D7 – 0
I/O
PIO data input/output D7 – 0
32
RESET
I
Reset input
33, 34
NC.
—
Not used.
35
WR
O
Write strobe output
36
COLORSEL
I
Color select with/without initial setting input (Fixed at “H” (C460), “L” (C560).)
37
EQSEL
I
Equalizer connection with/without initial setting input (C560)
38
D-BASS SEL
I
D-BASS control with/without initial setting input (Fixed at “L” (C460), “H” (C560).)
39
DSPSEL
I
DSP control with/without initial setting input (Fixed at “H” (C460), “L” (C560).)
40
ILL-IN
I
Illumination detection input
41
TELMUTE
I
Telephone mute detection input
42, 43
DSTSEL1, 0
I
Destination select setting input
44
RD
O
Read strobe output
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