Sony CX-JN1 / JAX-N1 / JAX-PK1 Service Manual ▷ View online
17
CX-JN1
SECTION 4
TEST MODE
MC COLD RESET
• The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
the set to the customer.
the set to the customer.
Procedure:
1. In the standby status, while pressing the
1. In the standby status, while pressing the
x
button, press the
[POWER]
button.
2. The set is reset, then becomes standby status.
GC TEST MODE
Procedure:
1. Press the
1. Press the
[POWER]
button to turn the power on.
2. While pressing the
x
button, press the
[POWER]
button for
5 seconds.
3. It change displays in order of model type, version and suffix at
2 seconds interval, then the display is back to normal status.
AMP TEST MODE
Procedure:
1. In the status where AC plug is disconnected, while pressing
1. In the status where AC plug is disconnected, while pressing
the
[VIDEO/AUX]
button, connect the AC plug to turn the
power on. Then enter the AMP test mode and display “AMP
TEST”.
TEST”.
2. If turn the
[VOLUME]
knob clockwise, it displays “VOLUME
MAX”, and if turn the knob counterclockwise, it displays
“VOLUME 0”.
“VOLUME 0”.
3. If the
[TREBLE]
and
[BASS]
knobs are turned clockwise or
counterclockwise, it change displays in order of “EQ MAX”,
“EQ MIN” and “EQ FLAT”.
“EQ MIN” and “EQ FLAT”.
4. To release from this mode, disconnect the AC plug and turn
the power off.
DISC TRAY LOCK
Procedure:
1. Press the
1. Press the
[POWER]
button to turn the power on.
2. While pressing the
x
button, press the
[ OPEN/CLOSE]
button for 5 seconds.
3. The message “LOCKED” is displayed and the tray is locked.
(Even if exiting from this mode, the tray is still locked)
4. To release this lock, while pressing the
x
button, press the
[ OPEN/CLOSE]
button for 5 again.
5. The message “UNLOCKED” is displayed and the tray is un-
locked.
CD REPEAT 5 LIMIT CANCEL MODE
• Number of repeat for CD playback is 5 times when the repeat
mode is “REPEAT”. This mode enables CD to repeat playback
for limitless times.
for limitless times.
Procedure:
1. Press the
1. Press the
[POWER]
button to turn the power on.
2. In the repeat on status, while pressing the
x
button, press the
[CD]
button to enter the CD repeat 5 limit cancel mode and
repeat mark blinks on the fluorescent indicator tube.
3. To release this mode, press the
[POWER]
button to turn the
power off.
Z
Z
CHANGE-OVER OF AM TUNER STEP BETWEEN
9 kHz AND 10 kHz (Except AEP, UK and CIS models)
9 kHz AND 10 kHz (Except AEP, UK and CIS models)
• A step of AM channels can be changed over between 9 kHz and
10 kHz.
Procedure:
1. Press the
1. Press the
[POWER]
button to turn the power on.
2. While pressing the
[TUNER]
button, press the
[POWER]
but-
ton to the display on fluorescent indicator tube changes to “AM
530 kHz” (10 kHz step) or “AM 531 kHz” (9 kHz step), and
thus the channel step is changed over.
530 kHz” (10 kHz step) or “AM 531 kHz” (9 kHz step), and
thus the channel step is changed over.
FUNCTION CHANGE MODE
• Select either TV, VIDEO or AUX (MD) of the external function
input.
Procedure:
1. Press the
1. Press the
[POWER]
button to turn the power on.
2. While pressing the
[VIDEO/AUX]
button, press the
[POWER]
button.
3. Each time this operation is operated, it change displays in or-
der of “TV”, “VIDEO” and “AUX”.
Ver 1.1
18
CX-JN1
CD TEST MODE
• This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the pickup.
Procedure:
1. In the status where AC plug is disconnected, while pressing
1. In the status where AC plug is disconnected, while pressing
the
[CD]
button, connect the AC plug to turn the power on.
2. When enter this mode, it displays “CD TEST” and few sec-
onds later, all segments turn on of the fluorescent indicator
tube.
tube.
3. To release from this mode, disconnect the AC plug and turn
the power off.
In this mode, it operates as following table.
Button
Operation
Purpose of use
M
Move the pick-up to outside track
Sled circuit check
m
Move the pick-up to inside track
Tracking circuit check
Mechanism operation check
Optical pick-up check
N
Playback a CD
Servo block check
If it cannot focus on, it continuous focus search
x
When playback a CD: stop playback
APC circuit check
When stop a CD:
Laser current measure
display “READING” (blink)
Focus search waveform check
continuous laser diode on
Tracking balance check
continuous focus search (not made focus on)
X
Pause, Tracking servo off
(ignore CLV error)
CX-JN1
19
19
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).
2. Turn the power on.
3. Load a disc (YEDS-18) and actuate the focus search. (In
1. Connect an oscilloscope to TP (FE) and TP (VC).
2. 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.
RF LEVEL CHECK
Procedure :
1. Connect an oscilloscope to TP (RF) and TP (VC).
2. Turn the power on.
3. Load a disc (YEDS-18) and playback.
4. Confirm that oscilloscope waveform is clear and check if RF
1. Connect an oscilloscope to TP (RF) and TP (VC).
2. Turn the power on.
3. Load a disc (YEDS-18) and playback.
4. Confirm that oscilloscope waveform is clear and check if RF
signal level is correct or not.
BD board
Oscilloscope
TP(FE)
TP(VC)
TP(VC)
symmetry
S-curve waveform
within 3
±
0.5Vp-p
A
B
TP(RF)
BD board
oscilloscope
TP(VC)
Note:
Clear RF signal waveform means that the shape “
◊ ” can be clearly
distinguished at the center of the waveform.
Connecting Location: BD board
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
TIME/DIV : 500ns
level : 1.3
±
0.3Vp-p
TP (VC)
TP (RF)
TP (FE)
IC721
– BD Board (Conductor side) –
SECTION 5
ELECTRICAL ADJUSTMENTS
CX-JN1
20
20
SECTION 6
DIAGRAMS
6-1.
BLOCK DIAGRAM – CD Section –
8
7
9
10
80
79
70 LIMIT SW
20
TDO
18
10
VO3(+)
FOIN
20
TIN
3
SPIN
7
LDS
25
SLIN
17 VO3(–)
11 VO2(+)
12 VO2(–)
26 VO4(+)
27 VO4(–)
2 VO1(+)
1 VO1(–)
A
C
B
D
E
F
LD
PD
CD DSP
IC721
21
FDO
23
SLDO
22
SPDO
25
CONT4
A
B
D
E
F
C
I-V AMP
DETECTOR
LD
PD
LASER DIODE
OPTICAL PICK-UP
BLOCK
(KSM-213DCP)
2-AXIS
DEVICE
(FOCUS)
(TRACKING)
M702
(SPINDLE)
M701
(SLED)
M
M
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC722
49
48
X701
16.9344MHz
S701
(LIMIT)
99 CD DO
98 CD DI
100 CD CLK
5 CD CE
97 CD WRQ
95 CD DRF
4 CD RESET
60
DATA
59
DATACK
52
C2F
58
LRSY
57
ASDFIN
56
ASDACK
55
ASLRCK
54
16MOUT
53
EFLG
50
FSX/16MIN
26
MP3RES
64
DO
63
DI
62
CL
74
CD NUMBER SENS
20
CD BUSY
9
RIN
LM-R
11
RESET
1
MUTE
94
POWER
27
HOLD
MUTE
POWER
HOLD
61
CE
65
WRQ
67
DRF
66
RES
4 OUT1
2 OUT2
M751
(LOADING)
M
LOADING MOTOR DRIVE
IC701
SYSTEM CONTROLLER
IC901 (1/2)
S751
OPEN/CLOSE
DETECT
OPEN
CLOSE
LEVEL SHIFT
Q731
TABLE ADDRESS
SENSOR
IC731
+
ROTARY
ENCODER
S711
7
FIN
LM-F
9
RIN
TM-R
4 OUT1
2 OUT2
M741
(TABLE)
M
TABLE MOTOR DRIVE
IC712
7
FIN
TM-F
LM-L, LM-R,
TM-L, TM-R
D
O-MUTE,
O-POWER,
HOLD
B
42
LCHO
45
RCHO
R-CH
CD
A
APC
FIN2
FIN1
LDD
LDS
TIN2
TIN1
XOUT
XIN
RF
4
EFMIN
3
ERROR
CORRECT
EQ,
AGC
COMMAND
INTERFACE
INTERFACE
CLOCK
GENERATOR
PH, BH
RF AMP
TBAL
A/D
CONVERTER
D/A
CONVERTER
EXTERNAL
AUDIO IN
SERIAL OUT
D/A
CONVERTER
SERVO
PROCESSOR
AUTOMATIC
POWER CONTROL
Q701
18
POWER DOWN
P-DOWN
RESET
RESET,
P-DOWN
C
• SIGNAL PATH
: CD
• R-ch is omitted due to same as L-ch.
(Page22)
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