Sony HCD-MG110 / HCD-MG310AV / MHC-MG110 / MHC-MG310AV Service Manual ▷ View online
17
HCD-MG110/MG310AV
Tape Speed Check
DECK B
Mode: Playback
1. Insert the WS-48A into the deck B.
2. Press the nN button on the deck B.
3. Confirm that the frequency counter reads 3,000
2. Press the nN button on the deck B.
3. Confirm that the frequency counter reads 3,000
±
60 Hz.
Sample value of Wow and Flutter: 0.3% or less W.RMS (JIS)
(WS-48A)
2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
so that outputs match within 1dB of peak.
3. Mode: Playback
4. Repeat step 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the
5. After the adjustments, apply suitable locking compound to the
parts adjusted.
Screw
position
position
L-CH
peak
peak
within
1dB
1dB
Output
level
level
L-CH
peak
peak
R-CH
peak
peak
within
1dB
1dB
Screw
position
position
R-CH
peak
peak
set
test tape
P-4-A100
(10 kHz, – 10 dB)
P-4-A100
(10 kHz, – 10 dB)
R-CH
oscilloscope
L-CH
R-CH
V
H
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good
wrong
MAIN AMP board
FRONT SPEAKER terminal (J501)
L-CH
FRONT SPEAKER terminal (J501)
L-CH
+
–
–
set
test tape
WS-48A
(3 kHz, 0 dB)
WS-48A
(3 kHz, 0 dB)
MAIN AMP board
FRONT SPEAKER terminal (J501)
L-CH, R-CH
FRONT SPEAKER terminal (J501)
L-CH, R-CH
frequency counter
Record/Playback Head Azimuth Adjustment
Note:
Perform this adjustments for both decks
Procedure:
1. Mode: Playback (FWD)
1. Mode: Playback (FWD)
DECK A DECK B
set
MAIN AMP board
FRONT SPEAKER terminal (J501)
L-CH, R-CH
FRONT SPEAKER terminal (J501)
L-CH, R-CH
+
–
–
level meter
test tape
P-4-A100
(10 kHz, – 10 dB)
P-4-A100
(10 kHz, – 10 dB)
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
reverse
forward
Ver 1.1
18
HCD-MG110/MG310AV
Ver 1.1
CD SECTION
Note:
1. CD Block is basically designed to operate without adjustment. There-
fore, check each item in order given.
2. Use PATD-012 disc (4-225-203-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MW impedance.
4. Clean the object lens by an applicator with neutral detergent when the
3. Use an oscilloscope with more than 10MW 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 (FEI) and TP (VC) on
the CD board.
the CD board.
2.
Turn the power on.
3.
Put the disc (PATD-012) 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
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
RFDC Level Check
Connection:
Procedure:
1.
1.
Connect an oscilloscope to test point TP (RFDC) and TP (VC)
on the CD board.
on the CD board.
2.
Turn the power on.
3.
Put the disc (PATD-012) in to playback the number two 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 (VC)
oscilloscope
A
B
symmetry
within 2
±
1 Vp-p
+
–
–
CD board
TP (RFDC)
TP (VC)
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
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 (PATD-012) in to playback the number two 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
+
–
–
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
19
HCD-MG110/MG310AV
Ver 1.1
E-F Balance Check
Connection:
Procedure:
1.
1.
Connect an oscilloscpe to test point TP (TE) and TP (VC) on
the CD board.
the CD board.
2.
Turn the power on.
3.
Put the disc (PATD-012) in to playback the number two track.
4.
Press the
[REPEAT]
button. (The tracking servo and the
sledding servo are 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
±
22%
Traverse Waveform
6.
Press the
[REPEAT]
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.
Traverse Waveform
Checking Location: CD board
+
–
–
CD board
TP (TE)
TP (VC)
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 (FEI)
TP (TE)
TP
(RFDC)
TP
(RFAC)
IC103
IC101
HCD-MG110/MG310AV
21
21
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
RF AMP,
FOCUS/TRACKING ERROR AMP
IC103
TE
E
F
F I-V AMP
E I-V AMP
AUTOMATIC
POWER
CONTROL
Q101
APC LD
AMP
LD
LD
PD
LASER DIODE
RFAC
ASYO
ASYI
ASYMMETRY
CORRECTION
CORRECTION
DIGITAL
PLL
DIGITAL SIGNAL PROCESSOR,
DIGITAL FILTER, D/A CONVERTER
IC101 (1/2)
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
86
87
85
84 19
SCOR
C-SQSO
C-SQCK
C-LATCH
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
M101
(SPINDLE)
MOTOR
DRIVE
MOTOR
DRIVE
CH2OUTF
CH2OUTR
M
M
M102
(SLED)
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC102
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
DIGITAL SERVO
PROCESSOR
IC101 (2/2)
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
83
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
When the optical pick-up
is inner position
is inner position
ON :
A
(Page 23)
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
88 LD ON
LEVEL
SHIFT
IC803
IC803
91
18
93
T-SENS3
T-SENS2
T-SENS1
TABLE
SENSOR
IC11 – 13
LOAD IN SW 6
LOAD OUT SW 7
LOAD IN
LOAD OUT
S842
(LOAD)
D-SENS 92
DISC IN
DETECT SENSOR
D841, Q841
LOAD NEG 3
LOAD POS 2
LOADING
MOTOR CONTROL
Q881 – 884
TABLE POS 5
TABLE NEG
TABLE
MOTOR CONTROL
Q885 – 888
100
3
2
RN1
FN1
16
17
MOTOR
DRIVE
9
8
10
11
MOTOR
DRIVE
OUT1 –
OUT1 +
OUT2 –
OUT2 +
RIN2
FIN2
LOADING/TABLE
MOTOR DRIVE
IC881
M51
(LOADING)
M
M
M52
(TABLE)
SYSTEM CONTROLLER
IC801 (1/5)
• SIGNAL PATH
: CD PLAY (ANALOG)
: CD PLAY (DIGITAL OUT)
• R-ch is omitted due to same as L-ch.
OPTICAL
TRANSCEIVER
IC361
OPTICAL
OUT (CD)
CD
L-CH
RFAC
VCA
SECTION 7
DIAGRAMS
7-1.
BLOCK DIAGRAM – CD SERVO Section –
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