Sony CMT-NEZ3 / CMT-NEZ5 / HCD-NEZ3 / HCD-NEZ5 Service Manual ▷ View online
13
HCD-NEZ3/NEZ5
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
14
HCD-NEZ3/NEZ5
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-NEZ3/NEZ5
15
15
HCD-NEZ3/NEZ5
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
SENS
CDDATA
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
67
96 97
81
78
117
93
77
86
98 99
115
107
102 105 104
110 111 113 68
31
CDCLK
33 68
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
32 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
IC1801 (1/2)
S101
(LIMIT)
MP3DI 29
MP3DO 30
MP3CLK 28
MICS 73
MIACK 72
MP3REQ 69
MILP 70
MP3RST 75
XTCN 66
STANDBY
3
MP3STB 71
• R-ch is omitted due to same as L-ch.
XTACN
95
(Page 16)
HCD-NEZ3/NEZ5
16
16
HCD-NEZ3/NEZ5
AC
DETECT
Q333, 338
R-CH
+
56
INPUT SELECT,
ELECTRICAL VOLUME
IC302
57
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
J500
PHONES
SPEAKER
IMPEDANCE
USE 6 – 16
Ω
+
–
–
–
+
R
L
J302
TUNER UNIT
L OUT
R OUT
ST CE
CE
R-CH
TUNED
TUNED
STEREO
STEREO
ST MUTE
TU-MUTING
ST DIN
DO
ST DOUT
DI
ST CLK
CLK
CE
TUNED
STEREO
DO
DI
CLK
RDS DATA
RDS DATA
RDS INT
RDS CLOCK
BIAS OSC
T301
REC BIAS
SWITCH
Q347, 348
M +10V
BIAS OSC
Q344
ERASE
HRPE301
(REC/PB/ERASE)
TAPE MECHANISM
DECK BLOCK
L-CH
R-CH
R-CH
DC
DETECT
Q342, 343
+
POWER
AMP
IC501
53
STDIN
51
STCLK
49
STCE
48
TUNED
54
STEREO
50
DOUT
TU-MUTING
55
STMUTE
RDS DATA
RDS CLOCK
47
REC/PB
18
BIAS
RDSDATA
RDS INT
87
I POWER MONITOR
58
FDATA
60
AMPMUTE
61
AMPSTBY
CAPSTAN/REEL
MOTOR DRIVE
Q1804, 1805
PLUNGER
DRIVE
Q1802, 1803
M M
(CAPSTAN/REEL)
(DECK-A)
SOL
10V
MOTOR
10V
PACK
REC
PLAY SW
END SW
TCPLAY
ENDSW
ENDSW
94
78
79
TC HARF/REC
80 S0L
35 LCDDATA
36 LCDCLK
36 LCDCLK
81 TCMOTOR
SIRCS
7
SYSTEM CONTROLLER
IC1801 (2/2)
(NEZ5: AEP, UK, EE, RU)
(EXCEPT E, E51, EA, SP)
(EXCEPT E, E51, EA, SP)
(E, E51, EA, SP)
(NEZ5)
(NEZ5: AEP, UK, EE, RU)
(NEZ5: AEP, UK, EE, RU)
M301
(FAN)
(FAN)
FAN MOTOR
DRIVE
Q316, 317
M
M
+
D307
D320
D313
(AC IN)
SUB POWER
TRANSFORMER
T901
MAIN POWER
TRANSFORMER
T902
SYS +3.3V
LCD +3.3V
LCD +4V
RECT
D911 – 914
D1809
D1898
D922, 923
D920, 936
AMP B+
TO
POWER AMP
AMP B–
VOLTAGE
SELECTOR
S901
+4V
REGULATOR
IC901
+9V
REGULATOR
IC902
+10V
REGULATOR
IC900
D +4V
+4V
REGULATOR
IC903
RECT
D916, 917
RECT
D918, 919
RECT
D907 – 910
RDS +3.3V
AM
ANTENNA
FM ANT
AM ANT
ANT GND
ANT GND
FM 75
Ω
COAXIAL
VOLTAGE
DETECT
IC1803
MAIN POWER
RELAY DRIVE
RELAY DRIVE
Q311, 315
+3.3V
REGULATOR
D305
D +3.3V
A +9V
M +10V
+7V
REGULATOR
Q320, 321
M +7V
B+ SWITCH
Q300, 301
65
CDON
6
POWER ON
20
ACCUT
12
RESET
REMOTE CONTROL
RECEIVER
IC1802
BACKLIGHT
76
LED DRIVE
Q1808
D1804, 1805
(LCD BACK LIGHT)
STBYLED
5
LED DRIVE
Q1806
D1806
X1801
32.768kHz
11
10
XT2
XT1
15
13
X1802
10MHz
CF2
CF1
LCD1801
LIQUID
CRYSTAL
DISPLAY
97 VOL ENCORDER
77 CD OPEN
ROTARY
ENCODER
RV1801
VOLUME
STANDBY
S1801 – 1813
(FRONT PANEL KEYS)
S820
(CD LID OPEN/CLOSE DETECT)
KEY0,
KEY1
KEY1
90, 89
RESET
SWITCH
Q1801
AC DETECT
Q1807
RY901
CD +1.5V
+1.5V
REGULATOR
IC303
74 KEYWAKEUP
B+ SWITCH
Q1809 – 1811
• Abbreviation
E51
: Chilean and Peruvian
EA
: Saudi Arabia
EE
: East European
RU
: Russian
SP
: Singapore
7-2. BLOCK DIAGRAM – MAIN Section –
(Page 15)
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