Sony HCD-GS100 Service Manual ▷ View online
21
HCD-GS100
CD SECTION
Note:
1. CD Block is basically designed to operate without adjustment. There-
fore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10M
3. Use an oscilloscope with more than 10M
Ω
impedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
S-curve Check
Connection:
Procedure:
1.
1.
Connect an oscilloscope to test point TP (FE) and TP (DVC)
on the CD board.
on the CD board.
2.
Turn the power on.
3.
Put the disc (YEDS-18) in and turned power switch on again
and actuate the focus search. (actuate the focus search when
disc table is moving in and out)
and actuate the focus search. (actuate the focus search when
disc table is moving in and out)
4.
Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak level within 2 ± 1
Vp-p.
between A and B. And confirm peak to peak level within 2 ± 1
Vp-p.
S-curve waveform
Note:
• Try to measure several times to make sure than the ratio of A : B
or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the
brightness to obtain best waveform.
Checking Location: CD board (Conductor side)
RFDC Level Check
Connection:
Procedure:
1.
1.
Connect an oscilloscope to test point TP (RFDC) and TP (DVC)
on the CD board.
on the CD board.
2.
Turn the power on.
3.
Put the disc (YEDS-18) in to playback the number five track.
4.
Confirm that oscilloscope waveform is clear and check RFDC
signal level is correct or not.
signal level is correct or not.
Note:
A clear RFDC signal waveform means that the shape “
◊
” can be
clearly distinguished at the center of the waveform.
+
–
–
CD board
TP (FE)
TP (DVC)
oscilloscope
A
B
symmetry
within 2
±
1 Vp-p
+
–
–
CD board
TP (RFDC)
TP (DVC)
oscilloscope
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level: 1.15
±
0.35 Vp-p
RFDC signal waveform
Checking Location: CD board (Conductor side)
RFAC Level Check
Connection:
Procedure:
1.
1.
Connect an oscilloscope to test point TP (RFAC) and TP (VC)
on the CD board.
on the CD board.
2.
Turn the power on.
3.
Put the disc (YEDS-18) in to playback the number five track.
4.
Confirm that oscilloscope waveform is clear and check RFAC
signal level is correct or not.
signal level is correct or not.
Note:
A clear RFAC signal waveform means that the shape “
◊
” can be
clearly distinguished at the center of the waveform.
RFAC signal waveform
Checking Location: CD board (Conductor side)
+
–
–
CD board
TP (RFAC)
TP (VC)
oscilloscope
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level: 1.35
±
0.4 Vp-p
22
HCD-GS100
E-F Balance Check
Connection:
Procedure:
1.
1.
Connect an oscilloscpe to test point TP (TE) and TP (DVC) on
the CD board.
the CD board.
2.
Turn the power on.
3.
Select the function “CD”.
4.
Press three buttons of
[ENTER]
,
M
, and
[REPEAT]
si-
multaneously to set the CD service mode.
5.
Put the disc (YEDS-18) in to playback the number five track.
6.
Press the
.
button. (The tracking servo and the sledding
servo are turned OFF)
7.
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 ± 22%
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%
Traverse Waveform
8.
Press the
.
button. (The tracking servo and sledding servo
are turned ON)
Confirm the C (DC voltage) is almost equal to the A (DC
voltage) is step 5.
Confirm the C (DC voltage) is almost equal to the A (DC
voltage) is step 5.
9. To exit from this mode, perform as follows.
1) Move the optical pick-up to the most inside track.
2) Press three buttons of
2) Press three buttons of
x
,
[CLEAR]
, and
[DISPLAY]
simultaneously. (cold reset)
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.
Traverse Waveform
Checking Location: CD board (Conductor side)
+
–
–
CD board
TP (TE)
TP (DVC)
oscilloscope
0V
B
level: 1.15
±
0.5 Vp-p
Center of
the waveform
the waveform
A (DC
voltage)
0V
Tracking servo
Sled servo
ON
C (DC
voltage)
voltage)
Tracking servo
Sled servo
OFF
Checking Location:
– CD BOARD (Conductor Side) –
TP (VC)
TP (FE)
TP (TE)
TP
(RFDC)
TP
(DVC)
TP
(RFAC)
IC103
IC101
23
23
HCD-GS100
SECTION 7
DIAGRAMS
7-1. Circuit Boards Location
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 PLAY
c
: CD PLAY (DIGITAL OUT)
E
: TAPE PLAY
G
: REC
q
: VIDEO IN (AUDIO)
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
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
• Waveforms
– CD Board –
– CD Board –
– MAIN Board –
– DISPLAY Board –
7
IC801
qd
(XOUT)
1V/DIV, 40ns/DIV
1V/DIV, 20
µ
s
/DIV
6
IC801
qa
(SUBXOUT)
3.5Vp-p
30.6
µ
s
2.6Vp-p
62ns
1V/DIV, 100ns/DIV
8
IC701
id
(X1)
4Vp-p
248ns
MAIN board
AMP board
POWER board
D.SENSOR (OUT) board
T.SENSOR board
D.SENSOR (IN) board
L.T MOTOR board
LOAD SW board
CD LED board
CD board
DISPLAY board
KEY board
HEADPHONE board
1.05Vp-p
1
IC103
qg
(RFAC)
(CD Play Mode)
(CD Play Mode)
2
IC101
el
(FE)
(CD Play Mode)
(CD Play Mode)
200mV/DIV, 1
µ
s
/DIV
50mV/DIV, 200
µ
s
/DIV
100mV/DIV, 200
µ
s
/DIV
1V/DIV, 20ns/DIV
150mVp-p
160mVp-p
3
IC101
ra
(TE)
(CD Play Mode)
(CD Play Mode)
4
IC101
yj
(XTAO)
4.8Vp-p
59ns
24
24
HCD-GS100
7-2. Block Diagrams
– CD Section –
: CD
• Signal Path
• R-CH is omitted due to same as L-CH.
SQSO
SQCK
A/D
CONVERTER
CH1OUTF
CH1OUTR
6
7
8
9
16
18
11
10
12
2
1
51
49
48
43
24
41
40
39
64 15
28
29
30
31
32
33
24
25
23
5
6
2
3
17
18
15
16
E
B
C
D
A
CD +5V
F
DETECTOR
A
B
C
D
RF
SUMMING
AMP
FOCUS
ERROR AMP
TRACKING
ERROR AMP
RFAC
FE
IC103
RF AMP,
FOCUS/TRACKING ERROR AMP
TE
E
F
F I-V AMP
E I-V AMP
Q101
AUTOMATIC
POWER
CONTROL
APC LD
AMP
LD
LD
PD
LASER DIODE
RFAC
ASYO
ASYI
ASYMMETRY
CORRECTION
CORRECTION
DIGITAL
PLL
IC101 (1/2)
DIGITAL SIGNAL PROCESSOR,
DIGITAL FILTER, D/A CONVERTER
DATA
XLAT
CLOK
14
5
6
MDP
26
7
8
XLON
3
XRST
DIGITAL
CLV
D/A
INTERFACE
SE
TE
FE
RFDC
FOCUS/TRACKING/SLED
SERVO DSP
FOCUS/TRACKING/SLED
PWM GENERATOR
SFDR
CH3FIN
CH4SIN
CH3RIN
CH3OUTF
CH3OUTR
CH2FIN
CH2RIN
CH1FIN
CH1RIN
20
MUTE
SRDR
TFDR
TRDR
FFDR
FRDR
S101
(LIMIT)
EMPH
WFCK
GFS
MIRR/DFCT/
FOK
DETECTOR
SERVO AUTO
SEQUENCER
SERVO
INTERFACE
CPU INTERFACE
18
63
62
61
19
19
SENS
20
23
35
28
27 19
SCOR
C-SQSO
C-SQCK(SCLK)
C-XLAT
C-CLK
C-DATA
C-SENS
C-SCOR
1 2
32 33
SCLK
COUT
9 21
SSTP
27
FOK
22
23
MIRR
DFCT
TO SERVO INTERFACE
CH4OUTF
CH4OUTR
(SPINDLE)
MOTOR
DRIVE
MOTOR
DRIVE
CH2OUTF
CH2OUTR
M
M
(SLED)
IC102
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
IC101 (2/2)
DIGITAL SERVO
PROCESSOR
OPTICAL PICK-UP
BLOCK
KSM-213BFN
SW
PD
I-V AMP
12
11
13
14
54
56 53
55
FILTER
FILO
PCO
CLTV
FILI
EFM
DEMODULATOR
SERIAL
IN
INTERFACE
DIGITAL
FILTER,
NOISE SHAPER
PWM
&
INTEGRATOR
BUFFER
CLOCK
GENERATOR
TIMING
LOGIC
DIGITAL
OUT
INTERNAL BUS
16K
RAM
ERROR
CORRECTOR
SUBCODE
PROCESSOR
60
21
C-XRST
XTAI
X101
16.9344MHz
AIN1
AIN2
AOUT1
AOUT2
TO MIRR/DFCT/
FOK DETECTOR
FOK DETECTOR
PCMD
BCK
LRCK
C2PO
C2PO
DOUT
66
XTAO
67
70
77
LOUT1
LOUT2
R-CH
72
75
71
76
A
AMP SECTION
EQ
IN
15
3
4
EQ
AC
SUM
17
FEI
RF DC
AMP
28
RFDCO
29
RFDCI
COIL
DRIVE
COIL
DRIVE
26
24
22
PWM3
PWM2
PWM1
PWM1
PWM3
PWM2
PWM3
PWM2
PWM1
25 LD ON
91
88
93
T-SENS3
T-SENS2
T-SENS1
IC11
TABLE
SENSOR
IC13
TABLE
SENSOR
IC12
TABLE
SENSOR
LOAD IN SW 86
LOAD OUT SW 87
LOAD IN
LOAD OUT
S842
(LOAD)
D-SENS 92
D441, Q841
DISC IN
DETECT SENSOR
LOAD NEG 3
LOAD POS 2
Q406, 408
LOADING
MOTOR CONTROL
TABLE POS 5
Q402, 404
TABLE
MOTOR CONTROL
TABLE NEG 100
3
2
RN1
FN1
16
17
MOTOR
DRIVE
9
8
10
11
MOTOR
DRIVE
OUT1 –
OUT1 +
OUT2 –
OUT2 +
RIN2
FIN2
IC401
LOADING/TABLE
MOTOR DRIVE
M441
(LOADING)
M
M
M442
(TABLE)
IC801 (1/4)
SYSTEM CONTROLLER
CD
L-CH
RFAC
VCA
+3.3V
Q801,802,
805,806
AMP
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