Sony CX-LFA600 / XR-FA600 Service Manual ▷ View online
17
CX-LFA600
Checking Location: BD board (Side B)
+
–
–
BD board
TP4 (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 TP4 (TE) and TP7 (VC)
on the BD board.
on the BD board.
2.
While depressing the
CD u
button, insert an AC plug 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
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
button
IC101
TP7
(VC)
(VC)
IC103
TP8
(RFAC)
(RFAC)
TP6
(RFDC)
(RFDC)
TP4
(FE)
(FE)
TP2
(TE)
(TE)
RV101
E-F Balance
Adjustment
E-F Balance
Adjustment
18
CX-LFA600
SECTION 7
DIAGRAMS
• Circuit Boards Location
MAIN BOARD
BD BOARD
LOADING BOARD
PHONE BOARD
FRONT BOARD
PT BOARD
19
19
CX-LFA600
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 µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
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.
•
f
: internal component.
•
2
: nonflammable resistor.
•
1
: fusible resistor.
•
C
: panel designation.
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 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)
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
• Indication of transistor
• Waveforms
– BD Board –
– BD Board –
– MAIN Board –
– FRONT Board –
1.2Vp-p
1
TP8 (RFAC)
200mV/DIV, 1
µ
s
/DIV
2
IC101
us
(XTAO)
1V/DIV, 40ns/DIV
3.3Vp-p
59.1ns (16.9MHz)
5
IC601
qh
(XOUT)
2V/DIV, 50ns/DIV
1V/DIV, 10
µ
s
/DIV
4
IC601
qd
(XT2)
5.2Vp-p
30.5
µ
s
4.6Vp-p
116ns
3
Q301 collector (Rec mode)
5V/DIV, 5
µ
s
/DIV
11.6Vp-p
11.6
µ
s
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
B
These are omitted.
C
E
Q
20
20
CX-LFA600
7-1. BLOCK DIAGRAM – CD 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
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
66
PCMD
26
RO
4
DATA
R-CH
IC603(1/5)
LEVEL SHIFT
IC603 (2/5)
IC603 (3/5)
IC603 (4/5)
IC603 (5/5)
L-CH
LOUT
ROUT
LOUT
ROUT
16.9344MHz
6
CLOK
5
XLAT
77
SQCK
8
SCLK
15
SCOR
76
SQSO
2
XRST
XDAT
87
CLK
97
XLT
86
SQCK
88
SCOR
3
SUBQ
91
7
SENS
SENS
94
IC601 (1/2)
SYSTEM CONTROLLER
15
RF AC
18
TE
IC104
D/A CONV,
MP3 DECODER
SDIO
12
23
LO
67
BCLK
BCKIA
13
65
LRCK
LRCKIA
14
71
XTAI
72
XTAO
XI
62
XO
63
5
MIDIO
6
MICK
7
MIACK
39
REQ
1
RESET
MIDIO2
100
MIDIO1
99
MICK
MICS
MILP
96
MIACK
68
MP3RST
78
3
76
MP3REQ
98
XRST
85
4
2
MICS
MILP
LD
1
RFSW
95
+2.5V
REG
1
3
IC121
CD +3.3V
+2.5V
19
RV101
X201
AVDD(3.3V)
A
MAIN SECTION
B
MAIN SECTION
PWM3
DATA
AO3
AO2
AO1
CLK
LD
PWM2
BUDO
BUCK
PWM1
IC103
D/A CONV.
3
2
1
6
7
8
16
4
18
2
17
3
15
5
14
6
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