Sony CX-LMNV5 / XR-MNV5 Service Manual ▷ View online
25
CX-LMNV5
Checking Location: BD board (Side B)
+
–
–
BD board
TP2 (TE)
TP7 (VC)
oscilloscope
Traverse Waveform
0V
B
level: 1.0
±
0.5 Vp-p
Center of
the waveform
the waveform
A (DC
voltage)
Traverse Waveform
0V
Tracking servo
Sled servo
ON
C (DC
voltage)
voltage)
Tracking servo
Sled servo
OFF
6.
Press the CD
u
button. (The tracking servo and sledding
servo are turned ON)
Rotate RV101 on BD board and adjust the C (DC voltage)
is almost equal to the A (DC voltage) in step 4.
Rotate RV101 on BD board and adjust the C (DC voltage)
is almost equal to the A (DC voltage) in step 4.
7. To exit from this mode, turn the power off.
Notes:
• Always move the optical pick-up to most inside track when
exiting from this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can
be chipped.
E-F Balance Adjustment
Connection:
Procedure:
1.
1.
Connect an oscilloscpe to test point TP2 (TE) and TP7 (VC)
on the BD board.
on the BD board.
2.
AC is put in pushing CD
u
button to enter the CD test
mode.
3.
Put the disc (YEDS-18) in to playback the number five track.
4.
Press the button. If it plays, press the
CD
u
button again. (The tracking servo and the sledding servo are
turned OFF)
turned OFF)
5.
Check the level B of the oscilliscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than
±
10%
Checking Location:
– BD BOARD (Side B) –
CD
u
IC101
TP7
(VC)
(VC)
IC103
RV101
E-F Balance
Adjustment
E-F Balance
Adjustment
TP8
(RFAC)
(RFAC)
TP6
(RFDC)
(RFDC)
TP4
(FE)
(FE)
TP2
(TE)
(TE)
26
CX-LMNV5
SECTION 8
DIAGRAMS
MODE MOTOR board
ROLLER MOTOR board
STOCKER MOTOR board
SW (1) board
TRANSLATION board
ST ENCODER board
PT board
MAIN board
VCD board
FRONT board
FAN board
VF board
MIC board
HP board
KEY board
BD board
SW (2) board
SW (3) board
SW (4) board
SENSOR board
• Circuit Boards Location
27
27
CX-LMNV5
• Waveforms
– BD Board –
– BD Board –
1.2Vp-p
1
TP8 (RFAC)
200mV/DIV, 1
µ
s
/DIV
2
IC101
us
(XTAO)
1V/DIV, 20ns/DIV
3.3Vp-p
59.1ns (16.9MHz)
3
IC901
qd
(CF2)
1V/DIV, 40ns/DIV
3.4Vp-p
115ns
(8.64MHz)
4
IC901
q;
(XT2)
1V/DIV, 10
µ
s
/DIV
2.4Vp-p
30.5
µ
s
(32.768kHz)
5
Q453
Collector (REC mode)
5V/DIV, 4
µ
s
/DIV
15.4Vp-p
11.8
µ
s
– MAIN Board –
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
∗
: Impossible to measure
•
f
: internal component.
•
2
: nonflammable resistor.
•
C
: panel designation.
•
H
: adjustment for repair.
For printed wiring boards.
Note:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
•
A
: B+ Line.
•
B
: B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: TUNER
J
: CD
d
: AUX
E
: PB (TAPE)
a
: REC (TAPE)
L
: VIDEO
: MIC
: MIC
• Abbreviation
MY
: Malaysia model.
SP
: Singapore model.
TH
: Thai model.
• Indication of transistor
B
These are omitted.
C
E
Q
C
B
These are omitted.
E
Q
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Side A)
the parts face are indicated.
B
These are omitted.
C
E
Q
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
6
IC802
ua
(XOUT)
1V/DIV, 10ns/DIV
4.6Vp-p
37 ns
– VCD Board –
28
28
CX-LMNV5
8-1. BLOCK DIAGRAM — BD, CHANGER SECTION —
: CD
• Signal Path
OPTICAL PICK-UP
BLOCK
(A-MAX.3)
PD1
PD2
I5-10
I1-6
LD
VC
VCC
7
5
3
1
2
4
+
3.3V
GND
IL-SW
PD
VR
LD
DRIVE
FOCUS
COIL
TRACKING
COIL
Q101
RF AMP
IC103
VC
27
A
6
B
7
C
8
D
9
E
10
F
11
LD
1
PD
2
IC102
MOTOR/COIL DRIVE
VO1+
52
VO1-
47
VO2+
56
VO2-
55
VO3+
2
VO3-
1
M
(SLED)
M102
M101
VO4+
10
VO4-
5
M
(SPINDLE)
F+
F-
T+
T-
35
IN1+
34
IN1-
32
IN2+
31
IN2-
27
IN3+
26
IN3-
24
IN4R
8
STBY
MDP
25
SRDR
30
SFDR
29
TRDR
32
TFDR
31
FRDR
34
FFDR
33
DIGITAL SIGNAL PROC.
IC101
DIGITAL SERVO
RFAC
50
29
RFDCI
28
RFDC
16
FE
17
FEI
12
SW
TE_BAL
RFDC
43
FE
39
TE
41
SE
40
SSTP
26
66
PCMD
4
DATA
16.9344MHz
6
CLOK
5
XLAT
DATA
XLAT
77
SQCK
SQCK
8
SCLK
15
SCOR
76
SQSO
2
XRST
XRST
RF-SW
PWM3
PWM2
PWM1
7
SENS
SCOR
SQSO
SENS
14
C2PO
C2PO
IC901 (1/3)
SYSTEM CONTROLLER
50
O-LOD_NEG
O-LOD_POS
O-SLD_POS
O-SLD_NEG
36
I-D. SENSOR
I-SW5-B
I-SW5-A
I-SW4
I-SW3
I-SW2-A
I-SW2-B
I-SW1-A
15
RF AC
18
TE
67
BCLK
65
LRCK
13
GFS
22
FOK
PCMD
CLK
BCLK
LRCK
GFS
FOK
71
XTAI
72
XTAO
37
O-ELV_POS
O-ELV_NEG
35
57
58
34
19
RV101
X201
AVDD(3.3V)
OUT1
FIN
OUT2
RIN
IC721
STOCKER MOTOR DRIVE
M761
(STOCKER)
M
7
9
4
2
52
49
OUT1
FIN
OUT2
RIN
IC711
ROLLER MOTOR DRIVE
M781
(ROLLER)
M
7
9
4
2
38
51
OUT1
FIN
OUT2
RIN
IC701
MODE MOTOR DRIVE
S771
ROTARY ENCODER (MODE)
M771
(MODE)
M
7
9
4
2
S713 (DISC IN (8/12cm))
S714 (DISC IN (8cm))
S715 (DISC OUT)
S716 (STOCKER IN/OUT)
S711 (DISC INSERT(8/12cm))
S717 (DISC POSITION)
S718 (STOCKING)
1
G
2
3
4
33
59
31
32
I-ELV_E3
I-ELV_E2
I-ELV_E1
I-ELV_E0
I-SLD_E3
I-SLD_E2
I-SLD_E1
I-SLD_E0
S702
ROTARY ENCODER
(STOCKER POSITION)
1
2
3
4
43
42
47
45
41
48
44
(ON : When disc insert)
S711
S713
S714
S715
S717
S718
(ON : When disc out from play position)
In the midst disc is moving
between play position and stocker
ON : disc is play position side
OFF : disc is stocker side
between play position and stocker
ON : disc is play position side
OFF : disc is stocker side
OFF: In the Midst disc is moving
between play position and
stocker
stocker
(ON : Play position)
(8cm disc only)
ON : Play position
S716
from stocker
ON : The moment disc in/out
LEVEL
SHIFT
Q731
DISC INSERT
DETECT SENSOR
IC751
A
VCD
SECTION
B
VCD
SECTION
C
VCD
SECTION
G
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