Sony CDX-C560RDS Service Manual ▷ View online
– 21 –
MW Auto Scan/Stop Level Adjustment
Setting :
D-BASS switch
: OFF
SOURCE
n MODE button : MW
AM RF signal
generator
Carrier frequency : 999 kHz
30% amplitude
modulation by
1 kHz signal
output level
30% amplitude
modulation by
1 kHz signal
output level
: 33 dB (44.7 µV)
AM dummy
antenna (50
antenna (50
Ω
)
antenna
terminal
terminal
set
15 pF
30
Ω
65 pF
Procedure :
1. Set to the test mode. (See page 19.)
2. Push the SOURCE button.
3. Push the MODE button and set to MW.
1. Set to the test mode. (See page 19.)
2. Push the SOURCE button.
3. Push the MODE button and set to MW.
Display
Adjustment Location : tuner unit (TU1)
–set upper view–
TU1
RV1
MW AUTO SCAN/
STOP LEVEL ADJ
RV2
FM AUTO SCAN/
STOP LEVEL ADJ
4. Push the preset 3 button.
Display
5. Adjust with the volume RV1 on TU1 so that the “MW”
indication turns to “MW0” indication on the display window.
But, in case of already indicated “MW0”, turn the RV1 so that
put out light “0” indication and adjustment.
But, in case of already indicated “MW0”, turn the RV1 so that
put out light “0” indication and adjustment.
Display
Adjustment Location : tuner unit (TU1)
REG
SHUF1
REG
SHUF1
REG
SHUF1
TP
TP
TP
VR601
FM RDS
S-METER
ADJ
RV3
FM STEREO
SEPARATION ADJ
– 22 –
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 (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
– 23 –
4-1. IC PIN DESCRIPTIONS
• IC4 MN1883220Y5C (TUNER SYSTEM CONTROL)
• IC4 MN1883220Y5C (TUNER SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1 – 6
—
—
Not used.
7
VDD
—
Power supply pin
8
OSCIN
I
Ceramic oscillator connection input pin (8 MHz)
9
OSCOUT
O
Ceramic oscillator connection output pin (8 MHz)
10
GND
—
GND
11
XT IN
I
Connect to GND.
12
XT OUT
O
Not used.
13
EX2
—
Connect to GND.
14
RESET
I
Reset input pin
15
RDSCKI
I
RDS clock input pin
16
BUIN
I
Back-up detection input pin
17
BUS ON
I
Bus interface bus on input pin
18 – 29
—
—
Not used.
30
RDSSI
I
RDS data input pin
31
NIL1
I
Fixed at “L”.
32
AM STIN
I/O
AM STEREO indicator input/output pin
33 – 35
—
—
Not used.
36, 37
NIL2, 3
I
Connect to GND.
38
SI
I
PLL data input pin
39
SO
O
PLL data output pin
40
CKO
O
PLL clock output pin
41
CE
O
PLL chip enable output pin
42
UNIREQ
O
Bus interface request output pin
43
LINK OFF
O
Bus interface link output pin
44
UNICKI
I
Bus interface serial clock-in input pin
45
UNISI
I
Bus interface serial data-in input pin
46
UNISO
I/O
Bus interface serial data-out input/output pin
47
VDD
—
Power supply pin
48
AVDD
—
Power supply pin for A/D conversion input.
49
AVREF
—
Reference voltage input pin for A/D conversion input. (+ side)
50, 51
NIL4, 5
I
Fixed at “L”.
52
RAMBU
I
RAM reset detection input pin
53
MUTSEL
I
Mute operation select pin
54, 55
DSTSEL1, 0
I
Destination select setting pin
56
AM VSM
I
AM S-meter voltage detection input pin
57
FM VSM
I
FM S-meter voltage detection input pin
58
AVREF
—
Reference voltage input pin for A/D conversion input. (- side)
59
AVSS
—
GND for A/D conversion input.
60
GND
—
GND
61
TU ON
O
TUNER-ON output pin
62
DX/LO
O
DX/LOCAL output pin (Fixed at “L”: DX)
63
SEKOUT
O
SEEK OUT output pin
64
AM ON
O
AM-ON output pin
65
FM ON
O
FM-ON output pin
66
TUNER-MUTE
O
MUTE output pin
67
AF-SEEK
I
Not used.
SECTION 4
DIAGRAMS
– 24 –
Pin No.
Pin Name
I/O
Pin Description
68
NIL6
I
Fixed at “L”.
69
—
—
Not used.
70
ST-IN
I/O
ST indicator input/MONO output
71
SD-IN
I
Signal detecter input pin
72 – 80
—
—
Not used.
Click on the first or last page to see other CDX-C560RDS service manuals if exist.