Sony CX-JN101 / JAX-N101 Service Manual ▷ View online
17
CX-JN101
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.
returning the set to the customer.
Procedure:
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 [POWER] button to turn the power on.
2. While pressing the
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
the [VIDEO/AUX] button, connect the AC plug to turn the power
on. Then enter the AMP test mode and display “AMP TEST”.
on. Then enter the AMP test mode and display “AMP 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 [POWER] button to turn the power on.
2. While pressing the
2. While pressing the
x
button, press the
OPEN/CLOSE
Z
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
Z
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 [POWER] button to turn the power on.
2. In the repeat on status, while pressing the
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.
and repeat mark blinks on the fluorescent indicator tube.
3. To release this mode, press the [POWER] button to turn the
power off.
CHANGE-OVER OF AM TUNER STEP BETWEEN
9 kHz AND 10 kHz
9 kHz AND 10 kHz
•
A step of AM channels can be changed over between 9 kHz
and 10 kHz.
Procedure:
1. Press the [POWER] button to turn the power on.
2. While pressing the [TUNER] button, press the [POWER] button
2. While pressing the [TUNER] button, press the [POWER] button
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 [POWER] button to turn the power on.
2. While pressing the [VIDEO/AUX] button, press the [POWER]
2. While pressing the [VIDEO/AUX] button, press the [POWER]
button.
3. Each time this operation is operated, it change displays in order
of “TV”, “VIDEO” and “AUX”.
18
CX-JN101
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)
CD TEST MODE
•
This mode can run the CD sled motor freely. Use this mode,
for instance, when cleaning the picAkup.
Procedure:
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 seconds
later, all segments turn on of the fluorescent indicator tube.
3. To release from this mode, disconnect the AC plug and turn
the power off.
19
CX-JN101
SECTION 5
MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads
pinch rollers
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head de-
magnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to
4. After the adjustments, apply suitable locking compound to
the parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
TORQUE MEASUREMENT
Meter reading
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
6.96 N • m to 14.02 N • m
71 to 143 g • cm
(0.98 – 1.99 oz • inch)
9.80 N • m
100 g or more
(3.53 oz or more)
9.80 N • m
100 g or more
(3.53 oz or more)
Mode
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Torque meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
20
CX-JN101
SECTION 6
ELECTRICAL ADJUSTMENTS
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
DECK-A DECK-B
Note:
Perform this adjustments for both decks
Procedure:
1. Mode: Playback
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.
DECK SECTION
0 dB=0.775 V
1. Demagnetize the record/playback head with a head
demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to
3. After the adjustments, apply suitable locking compound to
the parts adjust.
TEST TAPE
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 parts adjusted.
Adjustment Location:Playback Head (DECK-A)
Record/Playback/Erase Head (DECK-B)
set
HP board
PHONES
jack (J221)
PHONES
jack (J221)
+
–
–
level meter
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
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
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
HP board
PHONES
jack (J221)
PHONES
jack (J221)
reverse
forward
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