Sony CMT-NEZ7DAB / HCD-NEZ7 Service Manual ▷ View online
HCD-NEZ7
13
13
HCD-NEZ7
SECTION 5
MECHANICAL ADJUSTMENTS
SECTION 6
ELECTRICAL ADJUSTMENTS
•
Precaution
1. Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head
pinch roller
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head
demagnetizer. (Do not bring the head magnetizer close to the
erase head.)
erase head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, appiy suitable locking compound to
4. After the adjustments, appiy suitable locking compound to
the parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
•
Torque Measurement
Mode
Torque Meter
Meter Reading
2.95 – 6.86 mN
⋅
m
FWD
CQ-102C
(30 – 70 g
⋅
cm)
(0.42 – 0.97 oz
⋅
inch)
FWD
0.15 – 5.39 mN
⋅
m
Back Tension
CQ-102C
(1.5 – 5.5 g
⋅
cm)
(0.021 – 0.076 oz
⋅
inch)
more than 5.89 mN
⋅
m
FF
CQ-201B
(more than 60 g
⋅
cm)
(more than 0.83 oz
⋅
inch)
more than 5.89 mN
⋅
m
REW
CQ-201B
(more than 60 g
⋅
cm)
(more than 0.83 oz
⋅
inch)
•
Tape Tension Measurement
Mode
Tension Meter
Meter Reading
FWD
CQ-403A
more than 100 g
(more than 3.53 oz)
0 dB=0.775 V
DECK SECTION
Procedure:
1. Mode: Playback
set
HEAD PHONE board
PHONES jack
(J500)
PHONES jack
(J500)
+
–
–
level meter
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
1. Demagnetize the record/playback head with a head
demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
•
Test Tape
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
Note:
Remove the cover (azimuth) before this adjustment.
Tape
Signal
Used for
P-4-A063
6.3 kHz, -10 dB
Azimuth Adjustment
3. Mode: Playback
4. After the adjustments, apply suitable locking compound to
the pats adjusted.
Adjustment Location: Record/Playback/Erase Head
set
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
oscilloscope
V
H
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good
wrong
HEAD PHONE board
PHONES jack
(J500)
PHONES jack
(J500)
Note:
1.
CD Block is basically constructed to operate without 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.
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 TP (RFACO) and TP (VC) on the
CD board.
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the
3. Press the
CD
u
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:
TP
(RFACO)
TP (VC)
– CD BOARD (Conductor Side) –
+
–
–
CD board
TP (RFACO)
TP (VC)
TP (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
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.
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
CD SECTION
HCD-NEZ7
14
14
HCD-NEZ7
SECTION 7
DIAGRAMS
7-1. BLOCK DIAGRAM – CD SERVO Section –
MIACK
8
PO11/BUCK/AD14
36
MILP
5
RESET
2
MICS
4
MIDIO
6
MICK
7
MP3 DECODER
IC301
A/D
CONVERTER
CH2OUTF
CH2OUTR
23
24
21
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
CLOCK
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
119
108
21 23
3
1
2
7
TO SERVO AUTO
SEQUENCER
42
51 53
XPCK
112
50 52
45
46
6
XRST
100
XRST
50
96 97
81
78
117
93
77
86
98 99
115
107
102 105 104
110 111 113 68
35
CD CLK
37 51
LRCK
BCK
PCMD
LRCKIA
SDI0
63 66 65
16
BCKIA
15
SFSY/LRCKIB
19
SBSY/BCKIB
18
14
LRCKI
BCKI
PCMDI
SDO0
62 60 61
11
36 19
26
27
28
29
24
22
20
19
37
36
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
41
35
34
EQ
AC_
SUM
RFAC
VCA
X171
16.9344MHz
SYSTEM CONTROLLER
IC801 (1/3)
S101
(LIMIT)
MP3 DATA IN 6
MP3 DATA OUT 5
MP3 CLK 7
MP3 CS 57
MP3 ACK 56
MP3 REQ 53
MP3 LP 54
MP3 RESET 58
CD XTCN 43
STANDBY
3
MP3 STBY 55
• R-ch is omitted due to same as L-ch.
XTACN
95
(Page 15)
HCD-NEZ7
15
15
HCD-NEZ7
7-2. BLOCK DIAGRAM – AUDIO Section –
ANTENNA
DAB 75
Ω
AC
DETECT
Q333, 338
R-CH
+
40
INPUT SELECT,
ELECTRICAL VOLUME
IC302
42
28
RECO-L
18
OUT-L
13
CONT
21 CD-L
23 ST-L
2 TC-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
J321
AUDIO IN
: AUX IN
: DAB
J500
PHONES
SPEAKER
+
–
–
–
+
R
L
J302
BIAS OSC
T301
REC BIAS
SWITCH
Q347, 348
M +10V
BIAS OSC
Q344
ERASE
HRPE301
(REC/PB/ERASE)
L-CH
R-CH
R-CH
DC
DETECT
Q342, 343
+
POWER
AMP
IC501
TC RELAY
BIAS ON/OFF
91
POWER MONITOR
49
AMP CLK/DATA/LT
44
AMP MUTE
45
AMP POWER
SYSTEM CONTROLLER
IC801 (2/3)
M301
(FAN)
(FAN)
FAN MOTOR
DRIVE
Q316, 317
FAN MOTOR
DRIVE (FOR DAB)
Q312, 314
M
M
+
D307
D320
D313
X801
32.768kHz
11
10
XCOUT
XCIN
15
13
X802
16MHz
XOUT
XIN
TC CONT
TC TRG
HALF
PLAY SW
END SW
LOW-PASS
FILTER
IC702, 703
TUNER SELECT
SWITCH
IC721
S1_DIN
S1_DOUT
AUDIO_RIGHT_OUT
R-CH
AUDIO_LEFT_OUT
DAB TUNER MODULE
66
TC TRG
63
TC MOTOR
94
HALF REC SW
65
TC PLAY
92
TC END SW
24 ST DATA OUT
26 ST DATA IN
25 ST CLK
23 ST CE
22 TUNED IN
27 STEREO IN
28 ST MUTE
21 RDS DATA
26 ST DATA IN
25 ST CLK
23 ST CE
22 TUNED IN
27 STEREO IN
28 ST MUTE
21 RDS DATA
ST DIN
ST DOUT
ST CLK
ST CE
TUNED
STEREO
ST MUTE
RSD DATA
RDS INT
TC TRG
TC CONT
HALF
PLAY SW
END SW
18 RDS INT
39 DAB SELECT SW
38 DAB MUTE
31
DAB DATA OUT
32
DAB DATA IN
DAB SELECT
SWITCCH
Q721
DAB MUTING
SWITCH
Q722
TUNER UNIT
L OUT
R OUT
ST CE
ST CE
R-CH
TUNED
TUNED
STEREO
STEREO
ST MUTE
ST-MUTING
ST DIN
ST DIN
ST DOUT
ST DOUT
ST CLK
ST CLK
RDS DATA
RDS DATA
RDS INT
RDS INT
AM
ANTENNA
FM ANT
AM ANT
ANT GND
ANT GND
FM 75
Ω
COAXIAL
TAPE MECHANISM
DECK BLOCK
CAPSTAN/REEL
MOTOR DRIVE
Q804, 805
PLUNGER
DRIVE
Q802, 803
M M
(CAPSTAN/REEL)
(DECK-A)
SOL
10V
MOTOR
10V
PACK
REC
PLAY SW
END SW
+
B
DAB
C
POWER
(Page 14)
(Page 16)
(Page 16)
HCD-NEZ7
16
16
HCD-NEZ7
7-3. BLOCK DIAGRAM – PANEL/POWER SUPPLY Section –
30
LCD DATA
67
STANDBY LED
29
IIC CLK
1
LCD CS
100
LCD RST
SIRCS
4
(AC IN)
SUB POWER
TRANSFORMER
T901
MAIN POWER
TRANSFORMER
T902
SYS +3.3V
LCD +3.3V
RECT
D911 – 914
D809
D898
D922, 923
D920, 936
AMP B+
TO
POWER AMP
AMP B–
+4V
REGULATOR
IC901
+7V
REGULATOR
Q320, 321
+10V
REGULATOR
IC900
D +4V
+4V
REGULATOR
IC903
RECT
D916, 917
RECT
D918, 919
RECT
D907 – 910
RDS +3.3V
VOLTAGE
DETECT
IC803
MAIN POWER
RELAY DRIVE
RELAY DRIVE
Q311, 315
+3.3V
REGULATOR
D305
D +3.3V
M +7V
M +10V
+9V
REGULATOR
IC902
A +9V
B+ SWITCH
Q300, 301
33
DAB POWER 3
34
DAB POWER 5
97
MAIN POWER
20
AC CUT
12
RESET
REMOTE CONTROL
RECEIVER
IC802
D804, 805
(LCD BACK LIGHT)
LED DRIVE
Q806
D806
LCD801
LIQUID
CRYSTAL
DISPLAY
80 VOLUME 1
79 VOLUME 2
59 CD OPEN
ROTARY
ENCODER
RV801
VOLUME
STANDBY
52
BACKLIGHT
LED DRIVE
Q808
S801 – 813
(FRONT PANEL KEYS)
S820
(CD LID OPEN/CLOSE DETECT)
KEY0,
KEY1
KEY1
90, 89
RESET
SWITCH
Q801
AC DETECT
Q807
RY901
CD +1.5V
+1.5V
REGULATOR
IC303
DAB +5V
+5V
REGULATOR
IC951
DAB +3.3V
+3.3V
REGULATOR
IC952
74 POWER KEY
B+ SWITCH
Q809, 811
LINE FILTER
LF901
C
POWER
B
DAB
SYSTEM CONTROLLER
IC801 (3/3)
(Page 15)
(Page 15)
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