Sony HCD-M100 / HCD-M300AV Service Manual ▷ View online
21
SECTION 5
ELECTRICAL ADJUSTMENTS
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 1 dB of peak.
so that outputs match within 1 dB of peak.
3. Mode: Playback
4. After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
0 dB = 0.775 V
DECK SECTION
1. Demagnetize the record/playback head with a head demagne-
tizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
3. After the adjustments, apply suitable locking compound to the
parts adjust.
4. The adjustments should be performed with the rated power sup-
ply voltage unless otherwise noted.
5. The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit ad-
justment.)
should be completed before performing recording circuit ad-
justment.)
6. The adjustments should be performed for both L-CH and R-
CH.
7. Switches and controls should be set as follows unless otherwise
specified.
• Test Tape
Record/Playback Head Azimuth Adjustment
Tape
Signal
Used for
P-4-A100
10 kHz, –10 dB
Azimuth Adjustment
WS-48B
3 kHz, 0 dB
Tape Speed Adjustment
P-4-L300
315 Hz, 0 dB
Level Adjustment
DECK A/B
Note: Perform this adjustments for both decks
Procedure:
1. Mode: Playback
1. Mode: Playback
set
main board
CN301B
Pin qs (L-CH)
Pin qa (R-CH)
CN301B
Pin qs (L-CH)
Pin qa (R-CH)
main board
CN301B
Pin 0 (GND)
CN301B
Pin 0 (GND)
+
–
–
level meter
test tape
P-4-A100
(10 kHz, –10 dB)
P-4-A100
(10 kHz, –10 dB)
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
MAIN
board
CN301B
set
board
CN301B
set
test tape
P-4-A100
(10 kHz, –10 dB)
P-4-A100
(10 kHz, –10 dB)
pin qa
oscilloscope
L-CH
R-CH
V
H
waveform of oscilloscope
in phase 45
° 90° 135° 180°
good
wrong
pin 0
pin qs
L
R
22
[MAIN BOARD] (Component Side)
[CASSETTE BOARD] (Component Side)
[LEAF SW BOARD] (Component Side)
Tape Speed Adjustment
DECK A/B
Note: Start the Tape Speed adjustment as below after setting to the test
mode.
Procedure:
1. Press the
1. Press the
@/1
button to turn ON the power.
2. Press the
x
button, ENTER button and TIMER SELECT
button simultaneously.
(The “VOLUME” on the fluorescent indicator tube will blink
while in the test mode.)
To exit from the test mode, press the
(The “VOLUME” on the fluorescent indicator tube will blink
while in the test mode.)
To exit from the test mode, press the
@/1
button.
Mode: Playback
1. Insert the WS-48B into the deck.
2. Press the H button on the deck.
3. Adjust RV1002 on the LEAF SW board so that frequency
2. Press the H button on the deck.
3. Adjust RV1002 on the LEAF SW board so that frequency
counter reads 3,000 ± 90 Hz.
Adjustment Location: LEAF SW board
Sample Value of Wow and filter
W, RMS (JIS) within 0.3%
(test tape: WS-48B)
(test tape: WS-48B)
Playback level Adjustment
DECK A/B
Procedure:
Mode: Playback
Mode: Playback
Adjust DECK A/B: VR301 (R-CH) so the level meter reading
becomes the adjustment limits below.
Adjustment Level:
CN301 PB level: 155 to 275 mV (– 14 to – 9 dB) level difference
between the channels: within ± 0.5 dB
Adjustment Location: CASSETTE board
becomes the adjustment limits below.
Adjustment Level:
CN301 PB level: 155 to 275 mV (– 14 to – 9 dB) level difference
between the channels: within ± 0.5 dB
Adjustment Location: CASSETTE board
+
–
–
set
test tape
WS-48B
(3 kHz, 0 dB)
WS-48B
(3 kHz, 0 dB)
main board
CN301B (Pin qs : L-CH)
CN301B (Pin qs : L-CH)
(Pin qa : R-CH)
frequency counter
+
–
–
set
test tape
P-4-L300
(315 Hz, 0 dB)
P-4-L300
(315 Hz, 0 dB)
Phones jack (HP801)
level meter
CN401
CN301B
IC501
CN402
1
9
2
8
1
15
2
16
12
2
11
1
VR301
PB
LEVEL
IC301
CN301
1
2
11
12
TAPE SPEED
RV1002
(NORMAL)
CN1001
23
23
When a general remote commander is used:
1.
1.
Press the @/1 button to turn ON the power.
2.
Open the front cover, and press the CD PLUS ONE button.
3.
Set the disc (YEDS-18) into the “PLUS ONE” slit.
4.
Close the front cover, and chuck the disc.
5.
Press the @/1 button to turn OFF the power.
6.
Connect the oscilloscope to TP (TE) of the BD board.
7.
Connect TP (ADJ) of the MAIN board and connect TP (GND)
with a lead wire.
with a lead wire.
8.
Press the @/1 button to turn ON the power.
9.
Playback the fifth track of the disc.
10. Press the 3 button on the remote commander. (The tracking
servo and the sledding servo are turned OFF.)
11. Check the level B of the oscilloscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 10%
Confirm the following :
A/B x 100 = less than ± 10%
10. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
11. Turn OFF the power, and remove the lead wire connected at
step 7.
Note : A clear RF signal waveform means that the shape “
◊” can be
clearly distinguished at the center of the waveform.
E-F Balance (Traverse) Check
The procedure for this checking method differs for when a general
remote control unit is used and not used.
The procedure for this checking method differs for when a general
remote control unit is used and not used.
12. Press the 8 button on the remote control unit. (The tracking
servo and sledding servo are turned ON.) Confirm the C (DC
voltage) is almost equal to the A (DC voltage) is step 11.
voltage) is almost equal to the A (DC voltage) is step 11.
13. Turn OFF the power, and remove the lead wire connected at
step 7.
CD SECTION
Note :
1.
CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
Therefore, 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 10 MW 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.
when the signal level is low than specified value with the
following checks.
S Curve Check
Procedure :
1.
Procedure :
1.
Press the @/1 button to turn ON the power .
2.
Open the front cover, and press the CD PLUS ONE button.
3.
Set the disc (YEDS-18) into the “PLUS ONE” slit.
4.
Close the front cover, and chuck the disc.
5.
Press the @/1 button to turn OFF the power.
6.
Connect the oscilloscope to TP (FE) of the BD board.
7.
Connect TP (ADJ) of the MAIN board and connect TP (GND)
with a lead wire.
with a lead wire.
8.
Press the @/1 button to turn ON the power.
9.
The first track will be played back automatically. When the
CHECK button is pressed, “S JI” will be displayed on the
fluorescent indicator tube, and focus search will be repeated.
CHECK button is pressed, “S JI” will be displayed on the
fluorescent indicator tube, and focus search will be repeated.
10. Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak level within 1.8 ±
0.6 Vp-p.
0.6 Vp-p.
11. Turn OFF the power, and remove the lead wire connected at
step 7.
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.
RF Level Check
Procedure :
1.
1.
Press the @/1 button to turn ON the power.
2.
Open the front cover, and press the CD PLUS ONE button.
3.
Set the disc (YEDS-18) into the “PLUS ONE” slit.
4.
Close the front cover, and chuck the disc.
5.
Press the @/1 button to turn OFF the power.
6.
Connect the oscilloscope to TP (RF) of the BD board.
7.
Connect TP (ADJ) of the MAIN board and connect TP (GND)
with a lead wire.
with a lead wire.
8.
Press the @/1 button to turn ON the power.
9.
Playback the fifth track of the disc.
oscilloscope
BD board
TP (FE)
TP (VC)
TP (VC)
S-curve waveform
symmetry
within 1.8
± 0.6Vp-p
A
B
oscilloscope
BD board
TP (RF)
TP (VC)
TP (VC)
RF signal waveform
level : 1.8
± Vp-p
VOLT/DIV : 200mV
TIME/DIV : 500ns
TIME/DIV : 500ns
+0.3
–0.2
–0.2
TP (TE)
TP (VC)
TP (VC)
BD board
oscilloscope
Traverse waveform
A (DC voltage)
B
Center of the waveform
level : 0.7
± 0.3 Vp-p
0V
Traverse waveform
0V
C (DC
voltage)
voltage)
Tracking servo
Sled servo
Sled servo
ON
Tracking servo
Sled servo
Sled servo
OFF
When a general remote commander is not used:
1.
1.
Solder lead wires to TP (DVDD) and TP (TOFF) on the BD
board severally.
board severally.
2.
Connect the oscilloscope to TP (TE) of the BD board.
3.
Press the
@/1
button to turn ON the power.
4.
Open the front cover, and press the CD PLUS ONE button.
5.
Set the disc (YEDS-18) into the “PLUS ONE” slit.
6.
Close the front cover, and chuck the disc.
7.
Playback the fifth track of the disc.
8.
Short-circuit the lead wire connected at step 1. (The tracking
servo is turned OFF)
servo is turned OFF)
9.
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
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B
× 100 = less than ± 10%
10. Disconnect the lead wire short-circuited at step 8. (The tracking
servo is turned ON.) Confirm the C (DC voltage) is almost
equal to the A (DC voltage) is step 8.
equal to the A (DC voltage) is step 8.
11. Turn OFF the power, and remove the lead wire connected at
step 1.
RF PLL Free-run Frequency Check
Procedure :
1.
Procedure :
1.
Connect the frequency counter to TP (PLCK) of the BD board.
2.
Press the
@/1
button to turn ON the power.
3.
Open the front cover, and press the CD PLUS ONE button.
4.
Set the disc (YEDS-18) into the “PLUS ONE” slit.
5.
Close the front cover, and chuck the disc.
6.
Playback the fifth track of the disc.
7.
Confirm that reading on frequency counter is 4.3218 MHz ±
30 kHz.
30 kHz.
Adjustment Location :
[ BD BOARD ] — CONDUCTOR SIDE —
[ MAIN BOARD ] — COMPONENT SIDE —
oscilloscope
BD board
TP (TE)
TP (VC)
TP (VC)
Traverse waveform
A (DC voltage)
B
Center of the waveform
level : 0.7
± 0.3 Vp-p
0V
Traverse waveform
0V
C (DC
Tracking servo
OFF
Tracking servo
ON
voltage)
frequency counter
BD board
TP (PLCK)
IC102
IC101
TP
(VC)
TP
(TE)
TP
(FE)
TP
(RF)
TP
(PLCK)
CN101
CN102
CN103
TP
(DVDD)
TP
(TOFF)
CN401
CN301B
IC501
CN402
1
9
2
8
1
15
2
16
12
2
11
1
HCD-M100/M300AV
24
24
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM – CD SECTION –
OPTICAL PICK-UP
BLOCK
(KSM-213BFN/C2NP)
LD
DRIVER
Q103
A+5V
LD
GND
FOCUS
COIL
F+
F
T+
T
TRACKING
COIL
IC103
FCS/TRK COIL
SL/SP MOTOR
DRIVER
SLED/SPINDLE SERVO
RF AMP
IC101
18
22
17
19
20
VR
PD
8
7
6
5
15
10
V02
V IN 4
V IN 3
3
V IN 1
2
MUTE
V06
V05
V07
V08
V04
V03
V02
V01
M
M
MOTOR
M102
SLED
MOTOR
M101
SPINDOL
S101
LIMIT
VDD
D IN
GND
A+5V
CD
DIGITAL
OUT
IC402
09
:CD
:DIGITAL OUT
• SIGNAL PATH
41
RF SM
VR
58
VCC
VC
A
B
C
D
E
F
DETECTOR
FOCUS/TRACKING/
FIN 1
2
FIN 2
1
E
3
F
4
LDD
62
LDS
63
FD
16
TO
15
SLD
29
SPD
27
52
DATA
50
CLK
51
CL
53
CE
34
TGL
54
DRF
39
CV-
40
CV+
Q101
30
SL-
Q102
31
SL+
35
TOFF
44
SLI
49
DEF
36
TES
37
HFL
33
JP+
32
JP-
DIGITAL SIGNAL
PROCESSOR
IC102
EFMI
10
EFMO
9
DEFI
1
TES
16
HFL
15
JP+
19
JP-
20
COIN
56
4.2M
61
CQCK
57
RWC
54
TGL
18
SLOF
V/P
14
CONT2
25
TOFF
17
CONT3
26
CLV+
12
CLV-
13
CONT4
27
31
D OUT
49
PW
CD TEXT
DECODER
IC104
SBSO
2
WFCK
4
MCK
5
EXCK
1
SCOR
3
12
SRDT
11
SCLK
13
DQSY
6
XMODE
50
SFSY
60
16M
51
SBCK
47
SBSY
53
WRQ
55
SQOUT
3
PDO
45
XI
44
XO
X101
16.9344MHz
37
L CH
40
R CH
R CH
58
RESET
CD CHANGER
CONTROL
IC401
80
IIC DATA
78
IIC CLK
66
65
64
67
55
49
SRDT
SCLK
DQSY
XMODE
WRQ
SQOUT
COIN
50
BD RESET
2
COCK
48
RWC
58
TGL
57
DRF
54
SL+
47
SL-
59
XTAL
32
EXTAL
31
X401
10MHz
D151
IC461
MOTOR DRIVER
8
9
11
10
OUT1+
OUT1-
OUT2+
OUT2-
M
M
MOTOR
M601
LOADING
MOTOR
M602
TABLE
3
2
16
17
R IN 1
F IN 1
R IN 2
F IN 2
LD OUT
76
LD IN
77
TBL L
75
TBL R
74
30
RESET
42
D SENS
Q471
8
15
8
D0
D7
A0
A14
SRAM
IC411
WE
27
20
CE
29
WE
RESET
SW
Q411
+5V
Q51
D51
DISC
SENSOR
DISC
SENSOR
62
TSENS 1
61
TSENS 2
70
UP SW
71
DOWN SW
69
DOOR SW
63
TSENS 3
TABL
SENSOR
IC51-53
S51
(UP)
S52
(DOWN)
S413
(DOOR)
RESET
IIC DATA
IIC CLK
CD L
MAIN
SECTION
(Page 26)
B
AMP
SECTION
(Page 25)
A
38
1
2
3
BUFFER
MOTOR
CONTROL
Q464,468
MOTOR
CONTROL
Q461,465
MOTOR
CONTROL
Q463,467
MOTOR
CONTROL
Q462,466
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