Aiwa CX-JN331, CX-JPK331 Service Manual
CX-JN331/JPK331
SERVICE MANUAL
Ver. 1.0 2005.05
CX-JN331 is the amplifier, CD player, tape deck
and tuner section in JAX-N331.
CX-JPK331 is the amplifier, CD pla yer, tape deck
and tuner section in JAX-PK331.
CD
Section
Tape deck
Section
E Model
Model Name Using Similar Mechanism CX-JN33/JPK33
CD Mechanism Type CDM74KS-F1BD81C
Base Unit Name BU-F1BD81C
Optical Pick-up Name KSM-215DCP
Model Name Using Similar Mechanism CX-JN33/JPK33
Tape T ransport Mechanism Type
CWM43FF13 (JPK331)
CWM43FR34 (JN331)
Amplifier section
CX-JN331
The following measured at AC 120, 127, 220, 240 V
50/60 Hz
DIN power output (rated): 48 + 48 watts (6 ohms at
1 kHz, DIN)
Continuous RMS power output (reference):
60 + 60 watts (6 ohms at
1 kHz, 10% THD)
CX-JPK331
The following measured at AC 120, 127, 220, 240 V
50/60 Hz
DIN power output (rated): 48 + 48 watts (6 ohms at
1 kHz, DIN)
Continuous RMS power output (reference):
60 + 60 watts (6 ohms at
1 kHz, 10% THD)
Inputs
VIDEO/MD IN (phono jacks):
voltage 450/250 mV,
impedance 47 kilohms
MIC (phone jack) chilean and peruvian model
sensitivity 1 mV,
impedance 10 kilohms
Outputs
PHONES (stereo mini jack):
accepts headphones of
8 ohms or more
SPEAKER: accepts impedance of 6 to
16 ohms
SPECIFICATIONS
CD player section
System Compact disc and digital
audio system
Laser Diode Properties Emission duration:
continuous
Laser Output: Less than
44.6 µW
(This output is the value
measurement at a distance
of 200 mm from the
objective lens surface on
the Optical Pick-up Block
with 7 mm aperture)
Frequency response 2 Hz − 20 kHz (±0.5 dB)
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
Tape deck section
Recording system 4-track 2-channel, stereo
Frequency response 50 − 13,000 Hz (±3 dB),
using Sony TYPE I
cassettes
Wow and flutter ±0.15% W. Peak (IEC)
0.1% W. RM S (NAB)
±0.2% W. Peak (DIN)
COMPACT DISC DECK RECEIVER
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 − 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
2 Band type:
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
(50-kHz step)
530 − 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 − 1,602 kHz
(with the tuning interval
set at 9 kHz)
– Continued on next page –
9-879-731-01
2005E05-1
© 2005.05
Sony Corporation
Personal Audio Group
Published by Sony Engineering Corporation
CX-JN331/JPK331
General
Power requirements
Mexican models: 127 V AC, 60 Hz
Other models: 120 V, 220 V or
Power consumption
Dimensions (w/h/d) incl. projecting parts and controls
Amplifier/Tuner/Tape/CD section:
Mass Approx. 8.3 kg
Design and specifications are subject to change
without notice.
230 − 240 V AC, 50/60 Hz
Adjustable with voltage
selector
110 watts
Approx. 280 × 325 ×
425 mm
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
This appliance is classified as a CLASS 1
LASER product.
This label is located on the rear exterior.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY P ARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
2
TABLE OF CONTENTS
CX-JN331/JPK331
1. SERVICING NOTES ............................................... 4
2. GENERAL ................................................................... 7
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 9
3-2. Case (Side-L/R) ............................................................... 10
3-3. Case (Top) ....................................................................... 10
3-4. Tray Panel........................................................................ 11
3-5. CD Mechanism Deck (CDM74KS-F1BD81C)............... 11
3-6. Front Pack Block ............................................................. 12
3-7. Back Panel Section......................................................... 12
3-8. MAIN Board.................................................................... 13
3-9. Tape Mechanism Deck
(CWM43FF13: JPK331)/(CWM43FR34: JN331) .......... 13
3-10. Table Assy ....................................................................... 14
3-11 MOTOR (TB) Board ...................................................... 14
3-12 MOTOR (LD) Board ...................................................... 15
3-13 Base Unit (BU-F1BD81C) .............................................. 15
3-14 Motor Gear Assy (Sled) (M102), CD BOARD ............. 16
3-15 Optical Pick-up (KSM-215DCP) .................................... 16
4. TEST MODE.............................................................. 17
5. MECHANICAL ADJUSTMENTS ....................... 21
6. ELECTRICAL ADJUSTMENTS ......................... 21
8. EXPLODED VIEWS
8-1. Case Section .................................................................... 56
8-2. Tape Mechanism Deck Section
(CWM43FF13: JPK331)/(CWM43FR34: JN331) .......... 57
8-3. Panel Board Section ........................................................ 58
8-4. Cassette Box Section ....................................................... 59
8-5. Front Panel Section ......................................................... 60
8-6. Back Panel Section .......................................................... 61
8-7. Chassis Section................................................................ 62
8-8. CD Mechanism deck Section-1
(CDM74KS-F1BD81C) .................................................. 63
8-9. CD Mechanism deck Section-2
(CDM74KS-F1BD81C) .................................................. 64
8-10. CD Mechanism deck Section-3
(CDM74KS-F1BD81C) .................................................. 65
8-11. Base Unit (BU-F1BD81C) .............................................. 66
9. ELECTRICAL PARTS LIST................................ 67
7. DIAGRAMS
7-1. Block Diagram − SERVO Section − .............................. 24
7-2. Block Diagram − MAIN Section − ................................ 25
7-3. Block Diagram
− PANEL/POWER SUPPLY Section −........................... 26
7-4. Printed Wiring Board − CD Board − ............................. 28
7-5. Schematic Diagram − CD Board −................................. 29
7-6. Printed Wiring Boards − CHANGER Section − ........... 30
7-7. Schematic Diagram − CHANGER Section −................. 31
7-8. Printed Wiring Board
− CDMP3 CONNECT Board −....................................... 32
7-9. Schematic Diagram
− CDMP3 CONNECT Board −....................................... 33
7-10. Schematic Diagram − MAIN Section (1/4) − ................ 34
7-11. Schematic Diagram − MAIN Section (2/4) − ................ 35
7-12. Schematic Diagram − MAIN Section (3/4) − ................ 36
7-13. Schematic Diagram − MAIN Section (4/4) − ................ 37
7-14. Printed Wiring Boards − MAIN Section −..................... 38
7-15. Printed Wiring Boards − PANEL Section − ................... 39
7-16. Schematic Diagram − PANEL Section (1/2) −............... 40
7-17. Schematic Diagram − PANEL Section (2/2) −............... 41
7-18. Printed Wiring Board − POWER AMP Section −.......... 42
7-19. Schematic Diagram − POWER AMP Section −............. 43
7-20. Printed Wiring Boards − TRANS Section −................... 44
7-21. Schematic Diagram − TRANS Section −....................... 45
3
CX-JN331/JPK331
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveforms is output three times.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
• MODEL IDENTIFICATION
– Rear View –
PART No.
RLRL
+
+
–
–
MODEL PART No.
CX-JPK331: Mexican model 4-252-231-2[]
CX-JN331/JPK331: Chilean and Peruvian models 4-252-231-3[]
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 ˚C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 ˚C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscou-s (sticky, less prone to flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
4
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF.
d
1
Remove the case (side-L).
2
Turn the loading gear in the direction
of arrow A.
A
CX-JN331/JPK331
Pull-out the disc tray.
3
SERVICE POSITION
– CD MECHANISM DECK –
CD mechanism deck
stan
CDMP3 CONNECT board
5
CX-JN331/JPK331
– FRONT PANEL SECTION –
MAIN board
PANEL board
front panel section
– AMP BOARD –
TRANS board
tape mechanism deck
front panel section
SUB TRANS board
AMP board
MAIN board
6
• LOCATION OF CONTROLS
4q
q
qkqlw;waw
1
283 5 6 7
Main unit
ALPHABETICAL ORDER
A – N O – Z
ALBUM + wk
ALBUM − wk
BASS control 5
CD qh
CD SYNC qs
Deck A 9
Deck B wl
DISC 1 − 3 wd
DISC SKIP/EX-CHANGE wf
Disc tray ws
DISPLAY qg
Display window 4
ENTER 2
i-Bass qd
2)
MIC jack
MIC LEVEL
MIDDLE control 5
e;
2)
e;
SECTION 2
GENERAL
Operation Dial
(AMS/TUNING) qf
P FILE 6
PHONES jack qa
PLAY MODE w;
PRESET EQ 3
REC PAUSE/START 8
Remote sensor 7
SURROUND wa
TAPE A/B qk
TREBLE control 5
TUNER/BAND qj
TUNING MODE w;
VIDEO/MD ql
VOLUME control wh
CX-JN331/JPK331
This section is extracted from
instruction manual.
BUTTON DESCRIPTIONS
?/1 (power) 1
Z PUSH (deck A) (eject) 0
Z (eject) wg
PUSH Z (deck B) (eject) wj
m (rewind) wk
x (stop) wk
H or hH
X (pause) wk
M (fast forward) wk
1)
CX-JN331 only
2)
CX-JPK331 chilean and
peruvian model only
1)
(play) wk
qg
qf
qd
qs
qa
0
9
j
h
s
wd
+—
++—
+—+—
—
Z Z
+—
++—
+—+—
—
wf
wg
wh
wj
wk
wl
e;
7
CX-JN331/JPK331
Remote control
ALPHABETICAL ORDER
A – E
ALBUM + qa
ALBUM − qd
CD qk
CLEAR qg
CLOCK/TIMER SELECT 2
CLOCK/TIMER SET 3
DISC SKIP 0
DISPLAY wa
ENTER 9
EQ qf
F – Z
FM MODE 4
FUNCTION 6
PLAY MODE w;
REPEAT 4
SLEEP ws
TAPE qj
TUNER BAND 5
TUNER MEMORY ql
TUNING MODE w;
VOLUME +/− qs
ws
wa
w;
ql
qk
qj
qh
BUTTON DESCRIPTIONS
?/1 (power) 1
m/M (rewind/fast forward)
7
N (play) 8
X (pause) 8
x (stop) 8
−/+ (tuning) qh
./> (go back/go forward)
qh
1
2
3
4
5
6
7
qg
qf
qd
8
9
q;
qa
qs
8
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
Note 1: The process described in can be performed in any order.
Note 2: Without completing the process described in , the next process can not be performed.
SET
3-2. CASE
(SIDE-L/R)
(Page 10)
CX-JN331/JPK331
SECTION 3
DISASSEMBLY
3-3. CASE (TOP)
(Page 10)
3-5. CD MECHANISM DECK
(CDM74KS-F1BD81C)
(Page 11)
3-6. FRONT PANEL
BLOCK
(Page 12)
3-9. TAPE
MECHANISM
DECK
(CWM43FF13: JPK331)/
(CWM43FR34: JN331)
(Page 13)
3-4. TRAY PANEL
3-7. BACK PANEL
3-8. MAIN BOARD
(Page 11)
SECTION
(Page 12)
(Page 13)
3-10. TABLE ASSY
(Page 14)
3-11. MOTOR (TB)
BOARD
(Page 14)
3-12. MOTOR (LD)
BOARD
(Page 15)
3-13. BASE UNIT
(BU-F1BD81C)
(Page 15)
3-14. MOTOR GEAR ASSY (SLED) (M102),
CD BOARD
(Page 16)
3-15. OPTICAL PICK-UP
(KSM-215DCP)
(Page 16)
9
CX-JN331/JPK331
)
Note: Follow the disassembly procedure in the numerical order given.
3-2. CASE (SIDE-L/R)
1
two screws
(case 3 TP2)
2
screw
(case 3 TP2)
3
two screws
(BVTP3
×
10)
7
case (side-R)
3-3. CASE (TOP)
4
case (side-L)
3
case (top)
2
three claws
5
three screws
(case 3 TP2)
1
two screws
(BVTP3 × 10
6
two screws
(BVTP3 × 10)
10
3-4. TRAY PANEL
1
Turn the loading gear
in the direction of arrow A.
A
four claws
B
3
Remove the tray panel
in the direction of arrow C.
C
2
Pull-out the tray in the direction
of arrow B.
CX-JN331/JPK331
3-5. CD MECHANISM DECK
(CDM74KS-F1BD81C)
5
wire (flat type) (17 core)
(CN873)
2
screw
(BVTP3
×
10)
4
7
CD mechanism deck
(CDM74KS-F1BD81C)
6
two connectors
(CN701, CN874)
3
three screws
(BVTP3
×
10)
1
screw
(BVTP3
×
10)
11
CX-JN331/JPK331
3-6. FRONT PANEL BLOCK
6
front panel block
3
screw
(BVTP3
4
1
wire (flat type) (29 core)
(CN302)
2
connector
(CN103)
×
8)
harness
2
2
connector
(CN112)
connector
(CN309)
2
connector
(CN324)
3-7. BACK PANEL SECTION
8
SUB TRANS board
7
two screws
(BVTP3
×
10)
1
wire (flat type) (15 core)
(CN101)
5
three screws
(BVTP3
×
8)
4
duct cover
2
connector
(CN901)
9
back panel section
3
two screws
(BVTP3
×
10)
5
three screws
(BVTP3
×
10)
12
2
two connectors
(CN904, 906)
6
two screws
(BVTP3
×
8)
3-8. MAIN BOARD
1
connector
(CN907)
4
3
connector
(CN307)
CX-JN331/JPK331
MAIN board
3-9. TAPE MECHANISM DECK
(CWM43FF13: JPK331)/
(CWM43FR34: JN331)
2
two screws
(BVTP3
×
8)
1
six screws
(BVTP2.6
×
8)
2
tape mechanism deck
(CWM43FF13: JPK331)/
(CWM43FR34: JN331)
13
CX-JN331/JPK331
)
3-10. TABLE ASSY
two claws
5
A
2
Pull-out the table assy.
6
table assy
3-11. MOTOR (TB) BOARD
1
screw
(PTPWH M2.6)
2
tray
1
Turn the loading gear
in the direction of arrow
3
belt (table)
4
hook
3
wire (flat type) (5 core
(CN702)
A
.
14
4
connector
(CN731)
6
5
two screws
(BTTP M2.6)
MOTOR (TB) board
3-12. MOTOR (LD) BOARD
4
MOTOR (LD) board
3
two screws
(BTTP M2.6)
CX-JN331/JPK331
1
3-13. BASE UNIT (BU-F1BD81C)
belt (loading)
2
connector
(CN704)
5
base unit
(BU-F1BD81C)
4
four insulators
3
four coil springs
(insulator)
2
four floating screws
(PTPWHM2.6)
1
wire (flat type) (27 core)
(CN201)
15
CX-JN331/JPK331
)
n
3-14. MOTOR GEAR ASSY (SLED) (M102), CD BOARD
7
gear (A)
6
claw
2
two screws
×
3)
(P2
qa
CD board
8
gear (B)
5
wire (flat type) (16 core
(CN101)
1
Remove two
solders.
4
3-15. OPTICAL PICK-UP (KSM-215DCP)
9
Remove two solders.
3
Remove the optical pick-up
(KSM-215DCP) in the directio
of arrow B.
B
0
motor gear assy (SLED)
(M102)
3
screw (2.6 × 8)
16
2
sled shaft
A
1
Slide the lever
in the direction of arrow
A
.
SECTION 4
TEST MODE
CX-JN331/JPK331
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.
Procedure:
1. Press the I/1 button to turn the power ON.
2. Press three buttons of x , [P FILE] and [DISC 1] simultaneously .
3. The message “COLD RESET” is displayed on the fluorescent
indicator tube momentarily, then becomes standby states.
TUNER STEP CHANGE-OVER
• A step of AM channels can be changed over between 9 kHz
and 10 kHz.
Procedure:
1. Press the I/1 button to turn the power ON.
2. Press the [TUNER/BAND] button to select “AM”.
3. Press the I/1 button to turn the power OFF.
4. Press two buttons of [PLAY MODE/TUNING MODE] and I/1
simultaneously.
5. The message “ AM 9K STEP” or “ AM 10K STEP” is displayed
on the fluorescent indicator tube, and thus the channel step is
changed over.
CD SHIP (LOCK) MODE
• This mode moves the optical pick-up to the position durable
to vibration. Use this mode when returning the set to the
customer after repair.
Procedure:
1. Press the I/1 button to turn the power ON.
2. Press the [CD] button to select “CD”.
3. Press two buttons of [CD] and [POWER] simultaneously.
4. The message “LOCK” is displayed on the fluorescent indicator
tube, and the CD ship mode is set.
CD SHIP (LOCK) MODE & COLD RESET
• This mode is used to perform CD chip (lock) mode and cold
reset simultaneously.
Procedure:
1. Press the I/1 button to turn the power ON.
2. Press the [CD] button to select “CD”.
3. Press three buttons of x , [CD] and [DISPLAY] simultaneously.
4. The message “COLD RESET” is displayed on the fluorescent
indicator tube momentarily, then becomes standby states.
CD TRAY LOCK MODE
• This mode is used to unable to take sample disc out of tray in
the shop.
Procedure:
1. Press the I/1 button to turn the power ON.
2. Press the [CD] button to select “CD”.
3. Set disc on the CD tray, press two b uttons of x and Z for 5
seconds.
4. The message “LOCKED” is displayed on the fluorescent
indicator tube and the CD tray is locked. (Even if pressing
the Z button, the message “LOCKED” is displayed on the
fluorescent indicator tube and the CD tray is locked)
5. To release from this mode, press tw o buttons of x and Z for
5 seconds.
6. The message “UNLOCKED” is displayed on the fluorescent
indicator tube and the CD tray is unlocked.
AMP TEST MODE
• This mode is used to display the parameter of amplifier IC
and display the VACS status.
Procedure:
1. Press the I/1 button to turn the power ON.
2. Press three buttons of x , [P FILE] and [PLAY MODE/TUNING
MODE] simultaneously.
3. When the AMP test mode is activated, the message “AMP
TEST IN” is displayed on the fluorescent indicator tube
momentarily, then amplif ier adjustment mode is displayed on
the fluorescent indicator tube.
4. Press the [DISPLAY] button to changed over between VACS
status display mode and the amplifier IC parameter display
mode.
5. In the amplifier IC parameter display mode, press the [i-BASS]
button to changed over DBFB ON/OFF, and when it is ON,
the character “D” is displayed on the fluorescent indicator tube.
6. In the amplifier IC parameter display mode, press the
[SURROUND] button to changed ov er surround ON/OFF, and
when it is ON, the character “S” is displayed on the fluorescent
indicator tube.
7. In the amplifier IC parameter display mode, turn each knob of
[BASS], [MIDDLE] and [TREBLE] causes respective parameters
to be changed, as well as change-over of the display on the
fluorescent indicator tube.
CHANGE-OVER FUNCTION OF MD/VIDEO
• This mode is used to enable function of external input to change
over between MD and VIDEO.
Procedure:
1. Press the I/1 button to turn the power ON.
2. Press two buttons of VIDEO (MD) and I/1 simultaneously.
3. The message “MD” or “VIDEO”is displayed on the fluorescent
indicator tube, and the function of external input is changed
over.
17
CX-JN331/JPK331
AGING MODE
• This mode can be used for operation check of CD section and
tape deck section.
CD section and tape deck section work in parallel.
If an error occurred:
The aging operation stops only an error occurred sections and
display then status.
If no error occurs:
The aging operation continues repeatedly.
Procedure:
1. Press the I/1 button to turn the power ON.
2. Press the [CD] button to select “CD”.
3. Set disc on the CD tray and set tape into the deck.
4. Press three buttons of x , [P FILE] and [DISC SKIP/EX-
CHANGE] simultaneously.
5. Aging operations of CD and tape are started at the same time.
6. To release from this mode, press the I/1 button to turn the
power OFF and press the function buttons.
1. Display at the Aging Mode
Display operating state of CD section and tape deck section
alternately.
If an error occurred, stop display which that section.
2. CD Section
The sequence during the aging mode is following as below.
Display at the aging mode is the same as the normal operation.
Aging mode sequence (CD section) :
3. Tape Deck Section
The sequence during the aging mode is following as below.
If an error occurred, stop display that step.
Aging mode sequence (tape deck section) :
Rewind the tape A and B
“TAPE AAG-1 or TAPE BAG-2”
Shut off
FWD play the tape A
“TAPE AAG-3”
2 minutes
Rewind the tape A
“TAPE AAG-6”
Shut off
FWD play the tape B
“TAPE BAG-3”
2 minutes
Rewind the tape B
“TAPE BAG-6”
Shut off
Start (from disc 1)
Disc chucking
TOC read
Play first track for 2 seconds
Play last track for 2 seconds
EX-change open/close
Open the disc tray
Disc skip
Close the tray
Change the next disc.
Note: “TAPE *AG-*” is display of each step.
PANEL TEST MODE
• This mode is used to check the fluorescent indicator tube, LEDs
and buttons.
Procedure:
1. Press the I/1 button to turn the power ON.
2. Press three buttons of x , [P FILE] and [ENTER] simultaneously.
3. Fluorescent indicator tube and LEDs are all turned ON.
4. Press two buttons of X and [ENTER] simultaneousl y, mode
is changed over.
5. In the key check mode, press each key , the defined key number
of every each key list is displayed on the fluorescent indicator
tube.
6. In the key count check mode, “KEYCNT 0” is displayed on
the fluorescent indicator tube. Each time a key is pressed, “K”
value increases. Howev er, once a ke y is pressed, it is no longer
taken into account.
7. In the headphone input check mode, connect the headphone,
the message “H_P ON” is displayed on the fluorescent
indicator tube, and disconnect the headphone, the message
“H_P OFF” is displayed on the fluorescent indicator tube.
8. In the volume check mode, “VOLUME FLAT” is displayed
on the fluorescent indicator tube. Turn the [VOLUME] knob
clockwise, the message “VOLUME UP” is displayed on the
fluorescent indicator tube momentarily and turn the [VOLUME]
knob counterclockwise, the message “VOLUME DOWN” is
displayed on the fluorescent indicator tube momentarily.
18
CX-JN331/JPK331
MC TEST MODE
• This mode is used to check operations of microprocessor.
Procedure:
1. Press the I/1 button to turn the power ON.
2. Press three buttons of x , [P FILE] and [DISC 3] simultaneously.
3. When the MC test mode is activated, VACS level is displayed
on the fluorescent indicator tube momentarily.
4. Turn the [AMS/TUNING] knob clockwise, the message “ALL
EQ MAX” is displayed on the fluorescent indicator tube
momentarily and turn the [AMS/TUNING] knob
counterclockwise, the message “ALL EQ MIN” is displayed
on the fluorescent indicator tube momentarily.
5. Press the [PRESET EQ] button, the message “ALL EQ FLAT”
is displayed on the fluorescent indicator tube momentarily.
6. Turn the [VOLUME] knob clockwise, the message “VOLUME
MAX” is displayed on the fluorescent indicator tube
momentarily and turn the [VOLUME] knob counterclockwise,
the message “VOLUME MIN” is displayed on the fluorescent
indicator tube momentarily.
7. Press the [i-BASS] button to changed over VACS ON/OFF.
8. When the [REC PAUSE/START] button is pressed twice with a
tape set in the deck-B, the function is switched “MD” or
“VIDEO” and recording starts. When the m or M button
is pressed during recording, the tape is rewound back to the
beginning of recording, the function is switched to “TAPE
B”, then playback starts.
9. When the [CD SYNC] key is pressed with the test tape (AMS-
100, AMS-110A) in the deck, number of space between tunes
is counted, then if AMS-110A is set, “OK” is displayed on the
fluorescent indicator tube and if AMS-100 is set, “NG” is
displayed on the fluorescent indicator tube.
10. Press the I/1 button to release from this mode, then cold reset
is performed.
VERSION DISPLAY MODE
• This mode is used to check the model, destination and software
version.
Procedure:
1. Press the I/1 button to turn the power ON.
2. Press three buttons of x , [P FILE] and [DISC 2] simultaneously.
3. When this mode is activated, model and destination is displayed
on the fluorescent indicator tube.
4. Press the [DISPLAY] button to changed o ver between software
version and year, month, day of the software creation display
mode and model and destination display mode.
5. To release from this mode, pr ess three buttons of x , [P FILE]
and [DISC 2] simultaneously.
CD ERROR CODE DISPLAY MODE
• This mode can be used for error code display of CD section.
Procedure:
1. Press the I/1 button to turn the power ON.
2. Press the [CD] key to select “CD”.
3. Press three buttons of x , [CD] and [DISC 1] simultaneously.
4. When this mode is activated, mechanism deck error code is
displayed on the fluorescent indicator tube.
5. Press the [i-BASS] button to changed over between optical pickup error code display mode and mechanism deck error code
mode.
6. Turn the [AMS/TUNING] knob to change o ver display of error
history.
1. Mechanism Deck Error Code Mode
• When this mode is entered, mechanism deck error code is
displayed with the 10-character format on the fluorescent
indicator tube.
The first digit from the left indicates:
The first digit from the left indicates which mode the error history
is. In the mechanism deck error code mode, “M” is displayed on
the fluorescent indicator tube.
The second digit from the left indicates:
(Error history No. display)
The second digit from the left indicates which order the error history
is. “1” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error .
The third and 4th digit from the left indicates:
(Error status display)
The third and 4th digit from the left indicates which error status is
indicated.
Display Status
00 No error
08 Table operation time-out (Table does not move to the target
position within the specified time)
16 In the chucking down operation, the operation was retried
by the maximum number of times but the operation could
not be completed
17 In the chucking up and down operation, the reverse
recovery processing was attempted but it could not be
recovered
18 In the chucking up operation, the operation was retried by
the maximum number of times but the operation could not
be completed
20 Loading operation time-out (Table does not move to the
target position within the specified time)
22 As the chuck was in the ex-open status at the initialization,
the closing was attempted but could not be completed
The 5th and 6th digit from the left indicates:
(Present status display)
The 5th and 6th digit from the left indicates which operating status
when an error occurred is indicated.
Display Status
01 Open completion status
02 From open status, the movement to chucking down position
is under way
03 From chucking down position, the open operation is under
way
04 Chucking down completion status
10 The chucking down operation is under way
11 The chucking up operation is under way
12 Close completion status
13 From close status, the ex-open operation is under way
14 From ex-open status, the close operation is under way
18 Ex-pen completion status
19
CX-JN331/JPK331
The 7th and 8th digit from the left indicates:
(Motor status display)
The 7th and 8th digit from the left indicates which motor output
status when an error occurred is indicated.
Display Status
× 0 No table motor output
× 1Table motor forward output
× 2Table motor backward output
× 3Table motor break output
0 × No loading motor output
1 × Loading motor forward output
2 × Loading motor backward output
3 × Loading motor break output
The 9th and 10 th digit from the left indicates:
(Tray status display)
The 9th and 10th digit from the left indicates which target processing
when an error occurred is indicated.
Display Status
01 Open operation
12 Close operation
18 Ex-open operation
2. Optical Pick-up Error Code Mode
• When this mode is entered, optical pick-up error code is
displayed with the 8-character format on the fluorescent
indicator tube.
The first digit from the left indicates:
The first digit from the left indicates which mode the error history
is. In the optical pick-up error code mode, “D” is displayed on the
fluorescent indicator tube.
The second digit from the left indicates:
(Error history No. display)
The second digit from the left indicates which order the error history
is. “1” indicates the latest error history, and each time the number
increases by one, the error history goes back to one-previous error.
The 5th and 6th digit from the left indicates:
(Error step display)
The 5th and 6th digit from the left indicates which processing when
a trouble occurred
Display Contents
01 Power OFF in progress
02 Initialize in progress
03 Oscillation stopping
04 From oscillation stop, oscillation starting
05 Stopping
06 Stop operation is under way
07 Start operation in progress
08 TOC read in progress
09 Search operation is under way
0A Playback operation is under way
0B Pause operation is under way
0C Playback manual search operation is under way
0D Pause manual search operation is under way
0E −
The 7th and 8th digit from the left indicates:
The 7th and 8th digit from the left indicates which operation in
progress when a trouble occurred. (Step of each processing of the
5th and 6th digits is indicated)
5 REPEAT LIMIT CANCEL MODE
• Number of repeat for CD playback is 5 times when the repeat
mode is “REPEA T”. This mode is used to enables CD to repeat
playback for limitless times.
Procedure:
1. Press the
2. Press the [CD] button to select “CD”.
3. Press three buttons of x , [CD] and [ENTER] simultaneously.
4. The message “LIMIT OFF” is displayed on the fluorescent
indicator tube momentarily, CD repeat 5 limit is cancelled.
I/1 button to turn the power ON.
The third and 4th digit from the left indicates:
(Error status display)
The third and 4th digit from the left indicates which error status is
indicated.
Display Status
01 Not focused (TOC read without a disc)
02 GFS NG (TOC read with a disc chucked)
03 Start operation time-over
04 Defocused continuously (Defocused during TOC reading)
05 Q code not entered for specified time
06 Tracking not turned ON
07 Blank disc (Blank disc TOC read)
20
SECTION 5
MECHANICAL ADJUSTMENTS
CX-JN331/JPK331
SECTION 6
ELECTRICAL 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 demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
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
Mode
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
Torque meter
FCQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
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)
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
the parts adjust.
• Test Tape
Tape Signal Used for
P-4-A100 10 kHz, −10 dB Azimuth Adjustment
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
DECK A DECK B
Note: Perform this adjustments for both decks
Procedure:
1. Mode: Playback
test tape
P-4-A100
(10 kHz,
−
10 dB)
2. Turn the adjustment scre w 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.
L-CH
peak
Output
level
set
within
1dB
MAIN board
CN309
Pin
5
(L-CH)
3
(R-CH)
Pin
MAIN board
CN309
4
(HP-GND)
Pin
level meter
+
–
within
1dB
Screw
position
R-CH
peak
L-CH
peak
R-CH
peak
Screw
position
21
CX-JN331/JPK331
e
CD board
Oscilloscope
TP(FE)
TP(VC)
p
TP(RFACO)
CD board
oscilloscope
TP(VC)
3. Mode: Playback
test tape
P-4-A100
(10 kHz, –10 dB)
L-CH
MAIN
baord
CN309
set
R-CH
waveform of oscilloscope
in phase 45°90°135°180
pin
L
R
pin
good
5
pin
3
4
oscilloscop
V
wrong
H
°
4. After the adjustments, apply suitable locking compound to
the pats adjusted.
Adjustment Location:Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
forward
reverse
CD SECTION
Note:
1. CD Block is basically designed to operate without adjustment. Therefore,
check each item in order given.
2. Use YEDS-18 (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MW 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.
S-CURVE CHECK
Procedure :
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)
4. Confirm that the oscilloscope waveform (S-curve) is
symmetrical between A and B. And confirm peak to peak le vel
within 3 ± 0.5 Vp-p.
S-curve waveform
symmetry
A
±
within 3
B
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.
0.5 Vp-
Connecting Location: CD board
RFAC LEVEL CHECK
Procedure :
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 RF A C
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.
22
Connecting Location: CD board
RF signal waveform
p
CX-JN331/JPK331
VOLT/DIV : 200mV
TIME/DIV : 500ns
– CD BOARD (Conductor Side) –
TP
(VC)
TP
(FE)
IC101
level : 1.3
±
0.3 Vp-
TP
(RFACO)
CX-JN331/JPK331
2323
CX-JN331/JPK331
7-1. BLOCK DIAGRAM – SERVO Section –
SECTION 7
DIAGRAMS
DETECTOR
A
B
C
D
F
E
OPTICAL PICK-UP
BLOCK
(KSM-215DCP)
LASER DIODE
PD
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
I-V AMP
LD
M101
(SPINDLE)
M102
(SLED)
M
M
CD +3V
AUTOMATIC
POWER
CONTROL
Q10
CH4OUTF
16
CH4OUTF
15
CH3OUTF
17
CH3OUTR
18
CH1OUTF
14
CH1OUTR
13
CH2OUTF
12
CH2OUTR
11
A
26
B
27
C
28
D
29
F
20
E
19
LD
36
MOTOR/COIL DRIVE
IC251
MOTOR
DRIVE
MOTOR
DRIVE
COIL
DRIVE
COIL
DRIVE
MUTE
20
CH4IN
CH3FIN
CH3RIN
CH1FIN
CH1RIN
CH2FIN
CH2RIN
SUMMING
AMP
FOCUS
ERROR
TRACKING
ERROR AMP
APC LD
AMP
24
23
21
4
5
5
7
RF
AMP
FILTER
CD DSP
IC101 (1/2)
AC_
SUM
34
FEO
24
TEO
22
PD
37
OPIN+
OPOUT
27
SFDR
9
SRDR
10
TFDR
11
TRDR
12
FFDR
13
FRDR
14
EQ_
IN
35
2
CD DSP
IC101 (2/2)
PWM GENERATOR
FOCUS/TRACKING/SLED
S101
(LIMIT)
RFAC
VCA
21 23
TEI
CONVERTER
FOCUS/
TRACKING/SLED
SERVO DSP
A/D
EQ
FEI
SSTP
7
RFACO
41
INTERFACE
SERVO AUTO
SEQUENCER
TO CPU INTERFACE
MIRR,
DFCT, FOK
DETECTOR
SERVO
42
45
46
RFACI
ASYI
ASYO
DIGITAL
CLV
PROCESSOR
FOK
MIRR
DFCT
COUT
SCLK
ASYMMETRY
CORRECTOR
MDP
6
100
3
1
2
119
108
XRST
51 53
FILI
PCO
FILO
CLTV
DIGITAL PLL
TO SERVO AUTO
SEQUENCER
CPU INTERFACE
DATA
CLOCK
XLAT
95
97 94
O-CD-CLK
O-CD-DATA
O-XLT (CD-LAT)
SYSTEM CONTROLLER
O-XRES (RESET)
93
1125052
XPCK
DEMODULATOR
SUBCODE
PROCESSOR
EXCK
SCOR
SENS
SBSO
SQSO
96 97
98 99115107102 105 104 110 111
I-SENS
IC601 (1/3)
O-MP3-DO
O-MP3-CLK
O-MP3 CS
I-MP3 ACK
I-MP3 REQ
I-SCOR (Q-DATA REQ)
O-MP3 LP
O-MP3 RESET
EFM
SQCK
I-MP3-DI
O-XTCN
32K
RAM
INTERNAL BUS
WFCK
XUGF
GFS
113
99
98
100
1
3
4
2
6
92
73I-CD NUM SENSER
20I-CD ENCODER
21I-CD OPEN/CLOSE
CORRECTOR
EMPH
68
MIDIO
6
MICK
7
MICS
4
MIACK
8
PO11/BUCK/AD14
36
MILP
5
RESET
2
ERROR
MP3 DECODER
IC301
LEVEL SHIFT
ROTARY
ENCODER
INTERFACE
M751
(LOADING)
M741
(TABLE)
Q731
S711
CLOSE
D/A
DIGITAL
M
M
ADDRESS DETECT
OPEN
117 93
C4M
CONVERTER
SELECTOR
LRCK
BCK
63 66 65
16
15
19
18 14
LRCKIA
SBSY/BCKIB
SFSY/LRCKIB
LOADING MOTOR DRIVE
4 OUT1
2 OUT2
TABLE MOTOR DRIVE
4 OUT1
2 OUT2
TABLE ADDRESS
SENSOR
IC731
DISC TRAY
S751
OPEN/CLOSE
DETECT
GENERATOR
D/A
PCMD
SDI0
BCKIA
CLOCK
LRCKI
BCKI
62 60 61
IC701
IC712
XTSL
XTAO
77
PCMDI
1196 5
SDO0
STANDBY
7FIN
9RIN
7FIN
9RIN
XTAI
XTACN
AOUT1
AOUT2
78
95
81
86
3
R-CH
MP3-STB
LM-F
LM-R
TM-F
TM-R
16.9344MHz
MUTING
Q306
MUTING
CONTROL
Q304, 305
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: CD PLAY
X171
R-CH
CD-MUTING
CD
A
CD-MUTING,
MP3-STB,
LM-F, LM-R,
TM-F, TM-R
(Page 25)
(Page 25)
B
CX-JN331/JPK331
SWITCHING
IC501
2424
Loading...