Sony CDX-3150 Service Manual ▷ View online
– 17 –
Adjustment Location : tuner unit (TU1)
–set upper view–
TU1
RV2
FM AUTO SCAN/
STOP LEVEL ADJ
RV1
MW AUTO SCAN/
STOP LEVEL ADJ
RV3
FM NOISE
FOCUS ADJ
RV4
FM STEREO
SEPARATION ADJ
– 18 –
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.
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 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 (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.
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
– 19 –
SECTION 4
DIAGRAMS
4-1. IC PIN DESCRIPTION
• IC800 µPD17017GF-B29-3B9 (SYSTEM CONTROL)
• IC800 µPD17017GF-B29-3B9 (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
CD SO/VOL DATA
O
CD serial data/electric volume serial data output pin
2
VOL CLK
O
Electric volume serial clock output pin
3
SENSE
I
CD sens signal input pin
4
ST/MONO
O
FM/AM select pin
5
ACC
I
Accessory power (ACC) voltage detection pin
6
FOK
I
Focus OK signal input pin
7
CD-LAT
O
CD latch signal output pin
8
SQCKO
O
Sub code Q data read clock output pin
9
CD RST
O
CD reset signal output pin
10
SQ SI
I
Sub code Q data input pin
11
NC
—
Not used. (Connect to GND.)
12
SCOR
I
Sub code sync detection signal input pin
13
BUIN
I
Power for operation (BATT) voltage detection pin
14
CDMON
O
Mechanism deck section power supply control pin
15
ILL ON
O
Illumination power supply control pin
16
LD ON
O
Laser power ON/OFF control pin
17
FM/AM
O
FM/AM select pin
18
SEEKOUT
O
SEEK OUT signal output pin
19
PW-ON
O
System power supply control pin
20
LCL/DX
O
LOCAL/DX select pin
21
BEEP
O
Beep sound output pin
22
VOL CE
O
Electric volume serial chip enable output pin
23
LM EJ
O
Loading motor control pin (Eject direction)
24
LM LOD
O
Loading motor control pin (Loading direction)
25
MUTE
O
Audio mute signal output pin
26
FM IF
I
FM IF counter input pin
27
AM IF
I
AM IF counter input pin
28
NOSE SW
I
Front panel with/without detection input pin
29
SD/ST
I
During SEEK operation, station detection input pin.
30
VDD1
—
Power supply pin
31
VCOL
I
AM OSC signal input pin
32
VCOH
I
FM OSC signal input pin
33
GND
—
GND
34
XOUT
O
System clock output pin (4.5 MHz)
35
XIN
I
System clock input pin (4.5 MHz)
36
EO0
O
Charge pump output pin
37
EO1
—
Not used.
38
NC
—
Not used. (Fixed at “H”.)
39, 40
NC
—
Not used.
41
VDD2
—
Power supply pin
42
EMPH.O
O
De-emphasis control pin
43, 44
COM1, COM0
O
Not used.
45
LCDSO
O
LCD serial data output pin
46
LCDCKO
O
LCD serial clock output pin
47
LCDINH
O
LCD blank display control output pin
48
LCDCE
O
LCD chip enable output pin
– 20 –
Pin No.
Pin Name
I/O
Pin Description
49 – 63
LCD25 – LCD11
O
Not used.
64
LCD10
O
At key return, signal output pin
65
TEST SW(LCD9)
I/O
Test mode direct settig input
66
BAND SW(LCD8)
I/O
Not used.
67
AREA2 SW(LCD7)
I
Destination setting pin
68
AREA1 SW(LCD6)
I
Destination setting pin
69, 70
LCD5, LCD4
O
Not used.
71
SELF SW(LCD3)
I/O
SELF SW input/LCD segment signal output pin
72
IN SW(LCD2)
I/O
DISC IN SW input/LCD segment signal output pin
73
L SW(LCD1)
I/O
LIMIT SW input/LCD segment signal output pin
74
D SW(LCD0)
I/O
DOWN SW input/LCD segment signal output pin
75
KEY-RETURN
I
Key return signal input pin
76 – 78
AD2 – AD0
I
Key input pin (A/D input)
79
AMP MUTE
O
Power amplifier mute signal output pin
80
CD CKO
O
CD serial clock output pin
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