Sony CDX-2160 / EXCD-206 Service Manual ▷ View online
– 18 –
Adjustment Location : tuner unit (TU1)
+
–
FM CENTER
OUT
(Both side
of R32.)
–tuner unit (TU1) (conductor side)–
R32
18
36
19
IC2
1
SEEK
(At FM AUTO SCAN/
STOP LEVEL ADJ,
add the +5 Vdc.)
STOP LEVEL ADJ,
add the +5 Vdc.)
FM SD
OUT
AM VT
OUT
T2
T3
T1
T3
T1
FM
SENS/IF
ADJ
SENS/IF
ADJ
T4
FM VT
VOLTAGE
ADJ
RV3
FM AUTO
SCAN/STOP
LEVEL ADJ
T5
FM CENTER
ADJ
–tuner unit (TU1)
(component side)–
(component side)–
FM VT
OUT
AM VT
VOLTAGE
ADJ
T9
AM SD
ADJ
RV4
RV4
AM IF
ADJ
T8
T7
T6
AM SENS
ADJ
– 19 –
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 (S700) on the key 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 (S700) on the key 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
– 36 –
• IC Block Diagrams
IC1 CXD2507AQ
XLON
SPOD
SPOC
SPOB
SPOA
CLKO
VDD
CNIN
SEIN
CLOK
XLAT
XLTO
DATO
52
53
54
55
56
57
58
59
60
61
62
63
64
51
SERVO AUTO
SEQUENCER
SEQUENCER
33
34
35
36
37
38
39
40
41
42
43
45
46
47
48
49
50
44
DATA
XRST
SENS
MUTE
SQCK
SQSO
EXCK
SBSO
SCOR
VSS
WFCK
EMPH
DOUT
C4M
FSTT
XTSL
XTAO
XTAO
XTAI
MNTO
20 21 22 23 24 25 26 27
29 30 31 32
28
LRCK
PCMD
BCLK
GTOP
XUGF
XPCK
VDD
GFS
RFCK
C2PO
XROF
MNT3
MNT1
1
2
3
4
5
6
7
8
9
9
10
11
12
16
17
18
19
13
14
15
FOK
MON
MDP
MDP
MDS
LOCK
TEST
FILO
FILI
PCO
VSS
VSS
AVSS
CLTV
AVDD
RF
BIAS
ASYI
ASYO
ASYE
WDCK
5
14
CPU
INTERFACE
SUB CODE
PROCESSOR
DIGITAL
CLV
EFM
DEMODULATOR
DIGITAL
PLL
ASYMMETRY
CORRECTOR
CORRECTOR
5
D/A
INTERFACE
ERROR
CORRECTOR
3
6
3
16K
RAM
DIGITAL
OUT
CLOCK
GENERATOR
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
OPOUT
CH4-IN
CH4
CTL1
CTL2
FWD
REV
TRAY
GND
CH3 –
CH5 –
COM
CH4 +
CH3 +
CH3-IN
CH3
VREF
CH2
CH2-IN
VCC
VCC
CH1 –
CH2 –
CH1-IN
OP IN –
CH1
CH1 +
OP IN +
CH2 +
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
DRIVE
BUFFER
LEVEL
SHIFT
SHIFT
LEVEL
SHIFT
SHIFT
LEVEL
SHIFT
SHIFT
LEVEL
SHIFT
SHIFT
THERMAL
SHUT
DOWN
15
16
17
18
19
20
21
22
23
24
25
26
27
28
LOGIC
CTL1
CTL2
FWD
REV
V/I
IC3 BA6796FP-T1
– 37 –
IC2 CXA1782BQ
36
35
34
33
32
31
30
29
28
27 26 25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
37
38
39
40
41
42
43
44
45
46
47
48
PHD 2
PHD 1
PHD
LD
RF O
RF I
CP
CB
CC1
CC2
FOK
SENS
C.OUT
XRST
DATA
XLT
CLK
VCC
ISET
SL O
SL M
SL P
TA O
TA M
FSET
TG2
TGU
SRCH
FE O
FLB
FGD
FDFCT
FE M
FEI
FEO
FE BIAS
F
E
EI
VEE
TED
LPFI
TEI
ATSC
TZC
TDFCT
VC
APC
LEVEL S
FOK
MIRR
RF IV AMP1
RF IV AMP2
FE AMP
TTL
IIL
FZC COMP
DFCT
IIL
TTL
IIL DATA REGISTER
INPUT SHIFT REGISTER
ADDRESS DECODER
OUTPUT DECODER
TTL
IIL
TOG1-3
BAL1-3
FS1-4
TG1-2
TM1-7
PS1-4
F IV AMP
E IV AMP
BAL1
BAL2
BAL 3
TE AMP
TZC COMP
DFCT
TM1
DFCT
FS4
ATSC
WINDOW COMP
TOG1
TOG2
TOG3
FCS PHASE
COMPENSATION
FS1
F SET
TG2
TM7
TM3
TM4
TM5
TM6
ISET
TRACKING
PHASE
PHASE
COMPENSATION
HPF COMP
LPF COMP
TG1
FS2
TM2
RF M
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