Sony CX-JN77 / JAX-N77 / JAX-PK77 Service Manual ▷ View online
CX-JN77
21
21
CD SECTION
Note:
1.
CD Block is basically designed to operate without adjustment. Therefore,
check each item in order given.
check each item in order given.
2.
Use YEDS-18 (3-702-101-01) unless otherwise indicated.
3.
Use an oscilloscope with more than 10M
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.
S-CURVE CHECK
Procedure :
1. Connect an oscilloscope to TP (FE) and TP (VC) on the CD
1. Connect an oscilloscope to TP (FE) and TP (VC) on the CD
board.
2. Press the
I/1
button to turn the power ON.
3. Load a disc (YEDS-18) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focus
search)
search)
4. Confirm that the oscilloscope waveform (S-curve) is
symmetrical between A and B. And confirm peak to peak level
within 3
within 3
± 0.5 Vp-p.
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.
Connecting Location: CD board
RFAC LEVEL CHECK
Procedure :
1. Connect an oscilloscope to TP (RFACO) and TP (VC) on the
1. Connect an oscilloscope to TP (RFACO) and TP (VC) on the
CD board.
2. Press the
I/1
button to turn the power ON.
3. Load a disc (YEDS-18) and playback.
4. Confirm that oscilloscope waveform is clear and check if RFAC
4. Confirm that oscilloscope waveform is clear and check if RFAC
signal level is correct or not.
Note:
Clear RFAC signal waveform means that the shape “
◊ ” can be
clearly distinguished at the center of the waveform.
Connecting Location: CD board
CD board
Oscilloscope
TP(FE)
TP(VC)
TP(VC)
symmetry
S-curve waveform
within 3
±
0.5 Vp-p
A
B
SECTION 5
ELECTRICAL ADJUSTMENTS
TP(RFACO)
CD board
oscilloscope
TP(VC)
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
TIME/DIV : 500ns
level : 1.3
±
0.3 Vp-p
– CD BOARD (Conductor Side) –
TP
(VC)
TP
(FE)
TP
(RFACO)
IC101
CX-JN77
22
22
SECTION 6
DIAGRAMS
6-1.
BLOCK DIAGRAM – SERVO Section –
MIACK
8
PO11/BUCK/AD14
36
MILP
5
RESET
2
MICS
4
MIDIO
6
MICK
7
9
RIN
LM-R
4 OUT1
2 OUT2
M751
(LOADING)
M
LOADING MOTOR DRIVE
IC701
7
FIN
LM-F
MP3-STB
CD-MUTING
9
RIN
TM-R
4 OUT1
2 OUT2
M741
(TABLE)
M
TABLE MOTOR DRIVE
IC712
7
FIN
TM-F
B
MP3 DECODER
IC301
A/D
CONVERTER
CH2OUTF
CH2OUTR
23
24
21
4
5
5
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
I-SENS
O-CD-DATA
O-XLT (CD-LAT)
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
CH4OUTF
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
I-SCOR (Q-DATA REQ)
A
CD
STANDBY
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
O-XRES (RESET)
93
96 97
81
78
117
93
77
86
98 99
115
107
102 105 104
110 111 113 68
95
O-CD-CLK
97 94
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
96
5
3
26
27
28
29
24
22
20
19
37
36
E
B
A
CD +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-215DCP)
PD
I-V AMP
D
C
EQ_
IN
41
35
34
EQ
AC_
SUM
RFAC
VCA
X171
16.9344MHz
73
I-CD NUM SENSER
20
I-CD ENCODER
21
I-CD OPEN/CLOSE
SYSTEM CONTROLLER
IC601 (1/3)
S751
OPEN/CLOSE
DETECT
OPEN
CLOSE
LEVEL SHIFT
Q731
TABLE ADDRESS
SENSOR
IC731
CD-MUTING,
MP3-STB,
LM-F, LM-R,
TM-F, TM-R
S101
(LIMIT)
ROTARY
ENCODER
S711
DISC TRAY
ADDRESS DETECT
I-MP3-DI 99
O-MP3-DO 98
O-MP3-CLK 100
O-MP3 CS 1
I-MP3 ACK 3
I-MP3 REQ 4
O-MP3 LP 2
O-XTCN 92
O-MP3 RESET 6
R-CH
MUTING
Q306
MUTING
CONTROL
Q304, 305
• R-ch is omitted due to same as L-ch.
XTACN
95
(Page 23)
(Page 23)
CX-JN77
23
23
6-2.
BLOCK DIAGRAM – MAIN Section –
OVER LOAD
DETECT
Q441, 442
PROTECT
DETECT
Q485, 487
AMS DETECT
Q327
THERMAL
DETECT
Q483, 484
FAN MOTOR
DRIVE
Q310
FEED BACK
SWITCH
Q106
TH441
R-CH
R-CH
R-CH
+
R-CH
R-CH
7
INPUT SELECT,
TONE CONTROL,
ELECTRICAL VOLUME
IC101
LOADING/TABLE
MOTOR DRIVE
IC371
Q1
6
Q0
37
TONE OUT1
15
REC OUT1
33
VOL OUT1
3
DATA
4
CLOCK
5
LCH
19
SI
10 Q4
12
Q6
14 Q8
CD-MUTING
MP3-STB
17 Q11
FRONT SP RELAY
11 Q5
TU-MUTING
13 Q7
LM-R
LM-F
16 Q10
TM-F
15 Q9
1 CD L
61 TUNER L
3 TAPE L
9 TAPE A1
7 PB OUT1
11 TAPE B1
63 MD L
36 VIN1
TM-R
REC/PB
SWITCH
IC201,
Q322, 323
R-CH
CD
A
CD-MUTING, MP3-STB,
LM-L, LM-R, TM-L, TM-R
LM-L, LM-R, TM-L, TM-R
B
• SIGNAL PATH
: CD PLAY
: TAPE PLAY (DECK-A)
: REC
• R-ch is omitted due to same as L-ch.
: TAPE PLAY (DECK-B)
: TUNER
MOTOR/PLUNGER DRIVER
IC602
18 SO
11 MP3-STB
C
JK101
R
VIDEO/MD
IN
L
: AUX IN
D481
D207
D206
M901
(FAN)
(FAN)
D201
J801
PHONES
SPEAKER
IMPEDANCE
USE 6 – 16
Ω
+
–
–
–
+
R
L
JK441
FM/AM TUNER PACK
AM
FM ANT
AM ANT
TUNER-L
TUNER-R
LC72121 CE
CE
R-CH
ANT GND
ANT GND
TUNED
TUNED
STEREO
STEREO
TU MUTE
TU-MUTING
LC72121 DI
DO
LC72121 DO
DI
LC72121 CLK
CLK
CE
TUNED
STEREO
DO
DI
CLK
RDS DATA
RDS DATA
RDS INT
RDS INT
FM 75
Ω
COAXIAL
BIAS OSC
L101
REC BIAS
SWITCH
Q324
B +9V
BIAS OSC
Q321
ERASE
HRPE1
(REC/PB/ERASE)
(DECK-B)
HP1
(PB)
(DECK-A)
L-CH
R-CH
R-CH
L-CH
R-CH
R-CH
40
AMS OUT
BAND-PASS
FILTER
Q351, 352
56
SAOUT1
18
SC
+
RY441
–1
–2
PROTECTOR
Q486, 488
POWER ON
MUTING
Q105
STANDBY
SWITCH
Q489
LEVEL
SHIFT
Q490, 491
MUTING
Q103
MUTING
CONTROL
Q101, 102
POWER AMP
ON/OFF
Q308
DC
DETECT
Q481, 482
+
+
+
POWER
AMP
IC441 (AEP, UK, CIS)
IC441 (Chilean, peruvian, Mexican)
LINE AMP
IC102
B+9V
B+9V
POWER ON
MUTING
Q309, 313
83
I-LC72121 DI
86
O-LC72121/BU2099FV CLK
84
O-LC72121 CE
67
I-TUNED-IN
68
I-STEREO-IN
87
O-BU2099FV LCH
85
O-LC72121/BU2099FV DO
RDS DATA
RDS INT
7
I-BU1924 DATA
8
I-BU1924 CLK
69
I-AMS-IN
24
I-STREAM/VACS
19
WFR/HP/MIC-IN
18
I-PROTECT
91
O-BD3401 DATA
88
O-BD3401 CLK
75
O-SYSTEM-MUTE
8
CAPSTAN/REEL
MOTOR DRIVE
Q601
6
PLUNGER DRIVE
(DECK-A)
Q603
M
M
(CAPSTAN/REEL)
(DECK-A)
(DECK-B)
MOTOR
SOL-A
M
M
7
PLUNGER DRIVE
(DECK-B)
Q602
SOL-B
A-HALF
B-SOL
A-SOL
CAPM+
A-MODE
REC (REW)
A-PHOTO
B-PHOTO
I-REEL A IN
I-REEL B IN
22
70
71
I-TAPE A STAT
3
DATA
4
CLOCK
5
LCH
B-HALF
B-MODE
REC (FWD)
23
I-TAPE B STAT
SYSTEM CONTROLLER
IC601 (2/3)
TAPE MECHANISM
DECK BLOCK
(AEP, UK)
(AEP, UK)
(Page 22)
(Page 22)
(Page 24)
CX-JN77
24
24
6-3.
BLOCK DIAGRAM – PANEL/POWER SUPPLY Section –
–27V
REGULATOR
Q902
W001
(AC IN)
SUB POWER
TRANSFORMER
PT902
RY901
VF1, 2
VDD2
VDD1,
VDD3/4
TO
FLUORESCENT
INDICATOR TUBE
+12V
REGULATOR
Q311
–VFL
VP
MAIN POWER
TRANSFORMER
PT901
RECT
D401
D401
RECT
D301 – 304
AMP B+ 1
AMP B– 1
RECT
D402
D402
AMP B+ 2
AMP B– 2
D324 – 326
D321
D609
D610
D607, 608
D316
D908
RECT
RECT
D314, 315
+3.3V
REGULATOR
IC301
B+3.5V
+3.3V
REGULATOR
IC302
VOLTAGE
DETECT
IC604
+3.3V
REGULATOR
IC603
CD +3V
+1.5V
REGULATOR
IC303
CD +1.5V
RECT
D309 – 312
RECT
D902 – 904
RY B+
FAN B+
+9V
REGULATOR
IC304
CD M+7V
RECT
D305 – 308
UNREG +16V
+9V
REGULATOR
IC303
B+9V
EVER +10V
M +9V
B+3.5V
B+ SWITCH
Q312
B+ SWITCH
Q604, 616
RESET SWITCH
Q605
B+ SWITCH
Q314, 315
RELAY DRIVE
Q361, 362
29
I-AC CUT
74
O-POWER RELAY
11
RESET
SYSTEM CONTROLLER
IC601 (3/3)
O-POWER LED 76
FRONT SP RELAY
C
FLUORESCENT
INDICATOR TUBE
FL601
S1 – 21
G1 – G13
42 – 30
43 – 45, 47 – 50,
52 – 65
LED601
I/1
O-I-BASS LED 77
I-SIRCS-IN 28
LED602
i-BASS
LED DRIVE
Q609
REMOTE CONTROL
RECEIVER
IC610
S601 – 610,
S621 – 630,
S621 – 630,
S641 – 650
(FRONT PANEL KEYS)
10 I-VOLUME-IN2
9 I-VOLUME-IN1
ROTARY
ENCODER
S660
VOLUME
82 I-MULTI-JOG IN2
I-KEY1 –
I-KEY3
I-KEY3
81 I-MULTI-JOG IN1
ROTARY
ENCODER
S661
AMS/
TUNING
27 – 25
X601
32.768kHz
13
12
O-XT2
I-XT1
16
15
X602
10MHz
CF2
CF1
VOLTAGE
SELECTOR
S901
(EXCEPT E51)
(E51)
(EXCEPT E51)
(E51, MX)
• Abbreviation
E51 : Chilean and Peruvian models
MX : Mexican model
MX : Mexican model
(Page 23)
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