Sony CMT-NE3 / HCD-NE3 Service Manual ▷ View online
13
HCD-NE3
TUNER STEP CHANGE-OVER
*
Either the 9 kHz step or 10 kHz step can be selected for the
AM channel step.
AM channel step.
Procedure:
1. Set the FUNCTION to AM, and press the
1. Set the FUNCTION to AM, and press the
I/1
button to turn
the power off.
2. While depressing the
TUNING +
M
>
button, press
the
I/1
button.
3. The message “9K STEP” or “10K STEP” is displayed on the
liquid crystal display, and thus the channel step is changed
over.
over.
14
HCD-NE3
Note:
1.
CD Block is basically constructed to operate without
adjustment.
adjustment.
2.
Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3.
Use an oscilloscope with more than 10 M
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.
when the signal level is low than specified value with the
following checks.
5.
Check the focus bias check when optical block is replaced.
FOCUS BIAS CHECK
Procedure :
1. Connect the oscilloscope to TP012 (RFACO) and TP013 (VC)
1. Connect the oscilloscope to TP012 (RFACO) and TP013 (VC)
on the BD board.
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the
3. Press the
CD
N
X
button.
4. Confirm that the oscilloscope waveform is as shown in the
figure below. (eye pattern)
A good eye pattern means that the diamond shape (
A good eye pattern means that the diamond shape (
◊
) in the
center of the waveform can be clearly distinguished.
• RF signal reference waveform (eye pattern)
Checking Location:
SECTION 5
ELECTRICAL CHECK
+
–
–
BD board
TP012 (RFACO)
TP013 (VC)
TP013 (VC)
oscilloscope
(DC range)
VOLT/DIV: 0.2 V (with the 10: 1 probe in use.)
TIME/DIV: 500 ns
TIME/DIV: 500 ns
1.1
When observing the eye pattern, set the oscilloscope
for AC range and raise vertical sensitivity.
for AC range and raise vertical sensitivity.
0.2 Vp-p
– BD BOARD (Conductor Side) –
TP012
(RFACO)
TP013
(VC)
HCD-NE3
15
15
SECTION 6
DIAGRAMS
6-1.
BLOCK DIAGRAM – CD SERVO Section –
A/D
CONVERTER
CH2OUTF
CH2OUTR
23
24
22
4
5
6
7
17
18
16
15
RFACI
ASYO
ASYI
FILTER
FILO
PCO
CLTV
FILI
DIGITAL PLL
ASYMMETRY
CORRECTOR
EFM
DEMODULATOR
CD DSP
IC101 (1/2)
MDP
DIGITAL
CLV
PROCESSOR
32K
RAM
ERROR
CORRECTOR
INTERNAL BUS
SQCK
SQSO
EXCK
AOUT1
C4M
XTSL
XTAO
XTAI
AOUT2
R-CH
D/A
DIGITAL
INTERFACE
D/A
CONVERTER
SELECTOR
CLOCK
GENERATOR
SUBCODE
PROCESSOR
SCOR
WFCK
XUGF
GFS
EMPH
SENS
DATA
CLOK
XLAT
SBSO
CD SENS
CD DATA
CD XLT
TEI
FEI
FOCUS/
TRACKING/SLED
SERVO DSP
FOCUS/TRACKING/SLED
PWM GENERATOR
SFDR
CH3FIN
CH4IN
CH3RIN
CH3OUTF
CH3OUTR
CH1FIN
CH1RIN
CH2FIN
CH2RIN
20
MUTE
SRDR
TFDR
TRDR
FFDR
FRDR
SSTP
COUT
MIRR,
DFCT, FOK
DETECTOR
SERVO AUTO
SEQUENCER
SERVO
INTERFACE
CPU INTERFACE
SCLK
TO CPU INTERFACE
FOK
MIRR
DFCT
2
OPIN+
CH4OUTF
CH4OUTR
27
OPOUT
M101
(SPINDLE)
MOTOR
DRIVE
MOTOR
DRIVE
COIL
DRIVE
CH1OUTF
CH1OUTR
COIL
DRIVE
M
M
M102
(SLED)
MOTOR/COIL DRIVE
IC251
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
CD DSP
IC101 (2/2)
•
SIGNAL PATH
: CD PLAY
14
13
11
12
CD SCOR
A
CD
13
11
12
9
10
14
112
101
20 22
3
1
2
7
TO SERVO AUTO
SEQUENCER
39
48 50
XPCK
105
47 49
42
43
6
XRST
93
CD XRST
5
89 90
76
73
110
86
72
81
91 92
108
100
95 98 97
103 104 106 64
6
CD CLK
8 9
LRCK
BCK
PCMD
59 62 61
LRCKI
BCKI
PCMDI
58 56 57
7
27
25
26
27
28
23
21
19
18
35
34
E
B
A
D +3.3V
F
DETECTOR
A
B
C
D
RF
SUMMING
AMP
FOCUS
ERROR
AMP
TRACKING
ERROR AMP
RFACO
FEO
TEO
E
F
AUTOMATIC
POWER
CONTROL
Q10
APC LD
AMP
LD
LD
PD
LASER DIODE
OPTICAL PICK-UP
BLOCK
(KSM-213EDP)
PD
I-V AMP
D
C
EQ_
IN
38
33
32
EQ
AC_
SUM
RFAC
VCA
X171
16.9344MHz
SYSTEM CONTROLLER
IC801 (1/2)
S101
(LIMIT)
CD XTXCN 3
•
R-ch is omitted due to same as L-ch.
XTACN
88
(Page 16)
HCD-NE3
16
16
6-2.
BLOCK DIAGRAM – MAIN Section –
AC
DETECT
Q333, 338
R-CH
+
95
INPUT SELECT,
ELECTRICAL VOLUME
IC302
94
28
REC-O-L
18
OUT-L
13
CONT
21 CD-L
23 TU-L
2 TA-L
19 AUX-L
REC/PB
SWITCH
Q326 – 332
R-CH
CD
A
•
SIGNAL PATH
: CD PLAY
: TAPE PLAY
: REC
•
R-ch is omitted due to same as L-ch.
: TUNER
J303
R
MD
L
: AUX IN
J301
PHONES
SPEAKER
IMPEDANCE
USE 6 – 16
Ω
+
–
–
–
+
R
L
J302
FM/AM TUNER PACK
TU-LCH
TU-RCH
TU-CE
CE
R-CH
TUNED
TUNED
STEREO
STEREO
MUTE
TU-MUTING
TU-DI
DO
TU-DO
DI
TU-CL
CLK
CE
TUNED
STEREO
DO
DI
CLK
BIAS OSC
T301
REC BIAS
SWITCH
Q346 – 348
B +10V
BIAS OSC
Q344, 345
ERASE
HRPE301
(REC/PB/ERASE)
TAPE MECHANISM
DECK BLOCK
L-CH
R-CH
R-CH
DC
DETECT
Q342, 343
+
POWER
AMP
IC501
30
TU DI
34
TU CLK
35
TU CE
36
TU TUNED
37
TU STEREO
32
TU DO
TU-MUTING
33
TU MUTE
TA REC/PLAY
TA BIAS
18
I POWER MONITOR
28
F DATA
99
AMP MUTE
98
AMP STBY
CAPSTAN/REEL
MOTOR DRIVE
Q804, 805
PLUNGER
DRIVE
Q802, 803
M M
(CAPSTAN/REEL)
(DECK-A)
SOL 9V
MOTOR 9V
PACK
REC
PLAY SW
FWD SW
TA PLAY SW
TA END SW
TA END SW
24
91
92
TA-SW
96 TA SOL
93 TA MOTOR
RMC
29
SYSTEM CONTROLLER
IC801 (2/2)
(EXCEPT E, E51, EA, SP)
(EXCEPT E, E51, EA, SP)
(E, E51, EA, SP)
D307
(AC IN)
SUB POWER
TRANSFORMER
T901
MAIN POWER
TRANSFORMER
T902
SYS +3.2V
SYS +3.1V
RECT
D913, 914
D810
D809
D923, 924
D922
D920, 921
AMP B+
TO
POWER AMP
AMP B–
VOLTAGE
SELECTOR
S901
+10V
REGULATOR
IC305
VM +10V
+3.9V
REGULATOR
Q312 – 314
RECT
D916, 917
RECT
D918, 919
RECT
D907 – 910
SYS +3.3V
AM
ANTENNA
FM ANT
AM ANT
ANT GND
ANT GND
FM 75
Ω
COAXIAL
VOLTAGE
DETECT
IC803
MAIN POWER
RELAY DRIVE
RELAY DRIVE
Q311, 315
+3.3V
REGULATOR
Q339
+3.3V
REGULATOR
Q317
M +7V
D +3.3V
B+ SWITCH
Q319, 320
2
CD ON
1
PWR ON
23
I POWER DOWN
11
RESET
REMOTE CONTROL
RECEIVER
IC802
ST/BY
39
LED DRIVE
Q806
D806
(STANDBY)
BACK LIGHT ON
97
LED DRIVE
Q808
D701 – 703
(LCD BACK LIGHT)
X801
32.768kHz
13
12
XT2
XT1
16
15
X802
10MHz
CF2
CF1
FL801
FLUORESCENT
INDICATOR TUBE
SEG1 – 33
LCD COM0 – 3
83 – 86
79 – 56,
53 – 45
22 VOL ENCODER
4 CD OPEN
ROTARY
ENCODER
RV801
VOLUME
S801 – 813
(FRONT PANEL KEYS)
S820
(CD LID OPEN/CLOSE DETECT)
KEY0,
KEY1
KEY1
25, 26
RESET SWITCH
Q801
RY901
+7V
REGULATOR
IC306
(Page 15)
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