Sony CDX-4170R Service Manual ▷ View online
– 21 –
FM Noise Focus Adjustment
Setting :
D-BASS switch : OFF
SOURCE button : FM
SOURCE button : FM
Carrier frequency : 98.00 MHz
Output level
Output level
: 60 dB (1 mV)
Mode
: stereo
Modulation
: 1 kHz, 75 kHz deviation (100%)
Procedure :
1. Tune the 98.00 MHz.
2. The then output level is supposing that (A) dB.
3. Adjust with the volume RV3 on TU101 so that the output level is
1. Tune the 98.00 MHz.
2. The then output level is supposing that (A) dB.
3. Adjust with the volume RV3 on TU101 so that the output level is
(A) – 30
±
1 dB then signal generator input set to – 20 dB.
Adjustment Location : See page 22.
Carrier frequency : 98.00 MHz
Output level
Output level
: 35 dB (56.2
µ
V)
Mode
: mono
Modulation
: no modulation
Procedure :
1. Set to the test mode. (See page 20.)
2. Push the SOURCE button and set to FM.
1. Set to the test mode. (See page 20.)
2. Push the SOURCE button and set to FM.
Display
FM RDS S-Meter Adjustment
Setting :
D-BASS switch : OFF
SOURCE button : FM
SOURCE button : FM
3. Push the preset 6 button.
4. Adjust RV101 so that the display indication is “160”.
4. Adjust RV101 so that the display indication is “160”.
Display
Specification : Display indication : 158 to 162.
Adjustment Location : See page 22.
FM Stereo Separation Adjustment
Setting :
D-BASS switch : OFF
SOURCE button : FM
SOURCE button : FM
FM stereo
Level meter
Level meter
signal generator
connection
reading (dB)
output channel
L-CH
L-CH
A
B
R-CH
L-CH
Adjust RV4 on TU101 for
minimum reading.
R-CH
R-CH
C
D
L-CH
R-CH
Adjust RV4 on TU101 for
minimum reading.
L-CH stereo separation : A – B
R-CH stereo separation : C – D
The separations of both channels should be equal.
R-CH stereo separation : C – D
The separations of both channels should be equal.
Specification : Separation more than 28 dB
Adjustment Location : See page 22.
Carrier frequency : 98.00 MHz
Output level
Output level
: 70 dB (3.2 mV)
Mode
: stereo
Modulation
: main : 1 kHz, 20 kHz deviation (26.5%)
sub : 1 kHz, 20 kHz deviation (26.5%)
19 kHz pilot : 7.5 kHz deviation (10%)
19 kHz pilot : 7.5 kHz deviation (10%)
Procedure :
FM RF signal
generator
0.01
µ
F
antenna
terminal
terminal
set
LINE OUT REAR
10 k
Ω
level meter
FM RF signal
generator
0.01
µ
F
antenna
terminal
terminal
set
LINE OUT REAR
10 k
Ω
level meter
FM RF signal
generator
0.01
µ
F
antenna
terminal
terminal
set
INTRO
REG
INTRO
REG
– 22 –
MW Auto Scan/Stop Level Adjustment
Setting :
D-BASS switch
: OFF
SOURCE
n MODE button : MW
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
µ
V)
Procedure :
1. Set to the test mode. (See page 20.)
2. Push the SOURCE button.
3. Push the MODE button and set to MW.
1. Set to the test mode. (See page 20.)
2. Push the SOURCE button.
3. Push the MODE button and set to MW.
Display
Adjustment Location : tuner unit (TU101)
4. Push the preset 3 button.
Display
5. Adjust with the volume RV1 on TU101 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 (TU101)
30
Ω
15 pF
65 pF
AM RF signal
generator
AM dummy
antenna (50
antenna (50
Ω
)
set
antenna
terminal
terminal
INTRO
REG
INTRO
REG
INTRO
REG
TU101
– set upper view –
RV1
MW AUTO SCAN/
STOP LEVEL ADJ
RV2
FM AUTO SCAN/
STOP LEVEL ADJ
RV3
FM NOISE
FOCUS ADJ
RV4
FM STEREO
SEPARATION ADJ
RV101
FM RDS
S-METER
ADJ
– 23 –
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 (S502) 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 (S502) 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
TP (RF)
TP (RF GND)
oscilloscope
RF signal waveform
VOLT/DIV : 200 mV
TIME/DIV : 500 nS
TIME/DIV : 500 nS
level : 1.0 – 1.5 Vp-p
IC3
IC1
IC2
CN2
CN1
CN3
TP
(RF)
TP
(RF GND)
FOCUS GAIN ADJ
RV4
RV1
FOCUS BIAS ADJ
– 24 –
– 25 –
Pin No.
Pin Name
I/O
Pin Description
47
VDD
—
Power supply (+5 V)
48
AVDD
—
Power supply for AD conversion input. (+5 V)
49
AVREF+
—
Reference voltage input (+ side) for AD conversion input. (+5 V)
50
KEYIN1
I
Key input
51
KEYIN0
I
Key input
52
KEYIN2
I
Key input
53
TBTGSEL
I
Automatic adjustment process with/without setting port
54
DSTSEL
I
Destination select setting port
55
RC IN0
I
Rotary commander input
56
NIL
I
Connect to GND.
57
VSM
I
FM and AM common signal meter A/D conversion input
58
AVREF-
—
Reference voltage input (- side) for AD conversion input. (GND)
59
AVSS
—
GND for AD conversion input.
60
GND
—
GND
61
LD ON, CTL2
O
LD ON and CTL2 common port
62
EMPH O
O
Emphasis control output
63
SEKOUT
O
SEEK OUT output
64
TUNON
O
TUNER power control output
65
FM ON
O
FM power control output
66
MUTE
O
System mute output
67
NCO
—
Not used.
68
AD ON
O
Power control output for AD conversion.
69
NOSESW
I
Front panel connect detection input (“L” : with front panel, “H” : without front panel)
70
ST
I/O
Used for both STEREO indicator display input and force MONO output. (FM)
71
SD IN
I
Signal detector input
72
PW SEL
I
Power select initial setting input
73
RDSSI
I
RDS-DATA input
74
TUNMUT
O
TUNER MUTE output
75
AMPMUT
O
Power amplifier mute control output
76
AMPON
O
Power amplifier power control output
77
TEST
I
Test mode setting input
78
DBCNT3
O
D-BASS level select port
79
DBCNT2
O
D-BASS level select port
80
INTSEL0
O
CNIN and SCOR signal select control port (“H” : CNIN, “L” : SCOR)
4-1. IC PIN DESCRIPTION
• IC501 MN1886426SD (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
F OK
I
Focus signal detection input
2
L SW
I
Sled limit detection switch input
3
IN SW
I
Disc insert detection input
4
ILLON
O
Illumination power control output
5
PW ON
O
System power control output
6
RC IN1
I
Rotary commander shift input
7
VDD
—
Power supply (+5 V)
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
Sub crystal (for clock) oscillator connection input pin (32.768 kHz)
12
XT OUT
O
Sub crystal (for clock) oscillator connection output pin (32.768 kHz)
13
EX2
I
Connect to GND.
14
RESET
I
Reset input (“L” : Reset)
15
CNIN, SCOR
I
CNIN and SCOR common port
16
BU IN
I
Back-up detection input
17
SENS
I
SENS input from CXD2507AQ.
18
VOLCE
O
Electric volume serial chip enable output
19
VOLSO
O
Electric volume serial data output
20
VOLCKO
O
Electric volume serial clock output
21
DBCNT1
O
D-BASS level select port
22
LM EJ
O
Loading motor control output (Eject direction)
23
LM LOD
O
Loading motor control output (Loading direction)
24
CDMON
O
Power control output for CD mechanism deck drive.
25
CD ON/CTL1
O
CD ON and CTL1 common port
26
RDSCKI
I
RDS-CLK input
27
PLLCKO
O
PLL CLK output
28
PLLSO
O
PLL DATA output
29
PLLCE
O
PLL CE output
30
SELF SW
I
Disc self store detection input
31
KEYAC
I
Key input acknowledge
32
CD RST
O
CD signal process IC reset output
33
CD CKO
O
CD signal process serial clock output
34
CD SO
O
CD signal process serial data output
35
CD LAT
O
CD signal process latch output
36
ACCIN
I
Accessory power detection input
37
PLLSI
I
PLL DATA input
38
BEEP
O
Buzzer control output
39
LCDCKO
O
LCD serial clock output
40
LCDSO
O
LCD serial data output
41
LCDINH
O
LCD blank display control output
42
LCDCE
O
LCD chip enable output
43
GFS
I
GFS signal detection input
44
SQ CKO
O
SUBQ clock output
45
SQ SI
I
SUBQ data input
46
D SW
I
DOWN switch detection input
SECTION 4
DIAGRAMS
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