Sony CDX-T6NV Service Manual ▷ View online
13
CDX-T6NV
GND
+
BUS cable
compact disc changer
master unit
power supply
(DC 14.4 V)
SECTION 3
MECHANICAL ADJUSTMENT
ELEVATOR HEIGHT (ADDRESS) ADJUSTMENT
Note:
This adjustments is necessary when the system controller (IC301),
variable resistor (RV302), lever (CHK.L) assy, lever (CHK.R) assy,
or chassis (EV) assy was replaced for any repair.
variable resistor (RV302), lever (CHK.L) assy, lever (CHK.R) assy,
or chassis (EV) assy was replaced for any repair.
Connection:
Adjustment Method:
1. Connect this set to the master unit (e.g. MDX-C7970/C7970R),
1. Connect this set to the master unit (e.g. MDX-C7970/C7970R),
load a disc magazine, and place the set vertically as shown
below.
below.
2. Connect the regulated power supply to the master unit, and
turn the power on.
3. Press the DISC button on the master unit and select DISC 6.
4. Adjust the variable resistor RV302 so that the reference holes
4. Adjust the variable resistor RV302 so that the reference holes
of the slider (6L) and of the chassis (6B) meet within an error
of
of
±
0.15 mm when the tray is loaded at address 6.
RV302
slider (6L)
slider (6L)
(reference hole)
slider (6L)
(reference hole)
chassis (6B)
chassis (6B)
(address 6 hole)
0.15mm
0.15mm
14
CDX-T6NV
GND
+
BUS cable
compact disc changer
master unit
power supply
(DC 14.4 V)
SECTION 4
ELECTRICAL CHECK
Note:
1. This check is performed with the set placed horizontally.
2. Power supply voltage: DC14.4 V (more than 3 A).
3. Be sure to use the disc “YEDS-18” parts code: 3-702-101-01, but only
2. Power supply voltage: DC14.4 V (more than 3 A).
3. Be sure to use the disc “YEDS-18” parts code: 3-702-101-01, but only
when indicated.
Connection:
FOCUS BIAS CHECK
Connection:
– RF Board (Component Side) –
Procedure:
1. Connect the oscilloscope to TP (RFAC) and TP (VC) on the
1. Connect the oscilloscope to TP (RFAC) and TP (VC) on the
RF board.
2. Put the set into play mode by loading the disc (YEDS-18).
3. Confirm that oscilloscope waveform is clear and check RF sig-
3. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
Note:
Clear RF signal waveform means that the shape “
◊” can be clearly distin-
guished 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.
and raise the vertical sensitivity so that it may be easily seen.
RF signal waveform
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
(10 : 1 probe in use)
TIME/DIV: 500 ns
(10 : 1 probe in use)
level: 1.4
+ 0.3
Vp-p
– 0.4
oscilloscope
(AC range)
+
–
–
TP (VC)
TP (RFAC)
IC101
15
CDX-T6NV
TRACKING OFFSET CHECK
Connection:
– RF Board (Component Side) –
Procedure:
1. Connect the oscilloscope to TP (TE) and TP (VC) on the RF
1. Connect the oscilloscope to TP (TE) and TP (VC) on the RF
board.
2. Put the set into play mode by loading the disc (YEDS-18).
3. Press the
3. Press the
[ AMS ]
button on the master unit, and check
the traverse waveform*.
4. Confirm that the oscilloscope waveform is symmetrical on the
top and bottom in relation to 0 V dc, and check this level.
* Traverse waveform: This is the tracking error wave form appears
when crossing the track.
A
B
0 V
A=B
traverse waveform
(100 track jump waveform)
(100 track jump waveform)
VOLT/DIV: 500 mV
TIME/DIV: 2 ms
Center: 0 V
TIME/DIV: 2 ms
Center: 0 V
Traverse waveform
. >
oscilloscope
(DC range)
+
–
–
TP (TE)
TP (VC)
IC101
CDX-T6NV
17
17
M
M
8
9
VO3+
VO3–
VIN3+
VIN3–
12
13
VO1+
VO1–
MOTOR
DRIVE
MOTOR
DRIVE
COIL
DRIVE
10
11
VO2+
VO2–
VIN1+B
VIN1–B
32
33
FFDR
FRDR
28
29
25
24
19
18
5
4
VL0+
VL0–
FWD
REV
1
2
SFDR
SRDR
A
B
C
D
E
F
I-V AMP
PD
LD
DETECTOR
6
7
8
9
10
11
E
D
C
B
A
F
1
LD
FOCUS
ERROR
AMP
15
RFAC
16
FE
18
2
TE
TRACKING
ERROR
AMP
AUTOMATIC
POWER
CONTROL
Q101
PD
RFDC
FE
TE
43 39 41 40
RFDC
FE
TE
51
49
48
ASYMMENTRY
CORRECTOR
RFAC
ASYI
ASYO
ASYO
DIGITAL
PLL
53 56 55
54
FILO
CLTV
PCO
FILI
FILTER
INTERNAL BUS
16k RAM
ERROR
CORRECTOR
42 GFS
18
GFS
61 CDDAT
5
DATA
59 CDCLK
7
CLOK
60 CDLAT
56 SQSO
58 SQCK
52 SCOR
43 SCLK
41 FOK
XRST
6
XLAT
44 SENS
8
SENS
1
SQSO
2
SQCK
20
SCOR
9
SCLK
24
FOK
CPU
INTERFACE
SUBCODE
PROCESS
PROCESS
RFDC
FE
TE
SE
OP AMP
ANALOG SWITCH
A/D CONVERTER
MIRR
DFCT
FOK
DIGITAL SERVO
SIGNAL PROCESS
PWM GENERATOR
30
31
31
32
TEDR
TRDR
VIN2–
21
6
7
VO4+
VO4–
VIN4+
VIN4–
DIGITAL
CLV
26
MDP
M
M103
(CHUCKING)
M102
(SPINDLE)
M101
(SLED)
TRACKING/FOCUS COIL DRIVE,
SLED/SPINDLE/CHUCKING
MOTOR DRIVE
IC201
MOTOR
DRIVE
COIL
DRIVE
SERVO AUTO
SEQUENCER
SERVO
INTERFACE
62
LOADF
5
LOADR
6
98
3
XRST
27
SSTP
LIM SW
SW101
(LIMIT)
97 LOAD SW
96 SAVE SW
96 SAVE SW
SW102
(CHUCKING END DETECT)
ON : When the optical pick-up
is inner position
is inner position
ON : When completion of the disc
chucking operation
chucking operation
DIGITAL FILTER,
NOISE SHAPER
77
70
76
71
AOUT2
AOUT1
BUFFER
AIN2
AIN1
72
75
LOUT1
LOUT2
MUTING
Q502, 503
67
XTAO
60
XTAI
X401
16.9344MHz
TIMING
LOGIC
CLOCK
GENERATOR
67
MUTE
SYSTEM CONTROLLER
IC301 (1/2)
DIGITAL SIGNAL PROCESSOR,
DIGITAL SERVO PROCESSOR,
DIGITAL FILTER, D/A CONVERTER
IC401
(TRACKING)
(FOCUS)
2-AXIS DEVICE
OPTICAL
PICK-UP BLOCK
(KSS-720A)
RF AMP,
FOCUS/TRACKING ERROR AMP
IC101
• SIGNAL PATH
: CD PLAY
LASER DIODE
PWM
&
INTEGRATOR
(L)
(R)
CN902 (1/2)
MUTING CONTROL
SWITCH
Q501
RFAC
SUMMING
AMP
4
AC
SUM
3
EQ
IN
IN
RFDC
SUMMING
AMP
RW/ROM
SW
12
APC AMP
RW/ROM
30
DC OFST
RFAC
VCA
RF EQ
AMP
28
RFDCO
RF AMP OFFSET
CONTROL SWITCH
Q102
99 RW SWL
CD-ROM/RW
SELECT SWITCH
Q301
D/A
INTERFACE
SERIAL
IN
INTERFACE
64
EMPH
66 EMPH
EFM
DE-
MODULATOR
GROUND-
ISOLATION
IC501
SECTION 5
DIAGRAMS
5-1.
BLOCK DIAGRAM – SERVO Section –
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