1. Remove the six screws A attaching the metal cover on the back of the body. 2. Remove the two screws B on both sides of the body. 3. Remove the metal cover from the body while lifting up the rear part of the metal cover. Fig.1
Metal cover
A
Metal cover
A
A
B
Fig.2
Metal cover
Fig.3
B
1-5
MX-J300 Removing the CD changer mechanism assembly (See Fig.4 to 7)
Prior to performing the following procedures, remove the metal cover. 1. Remove the two screws C attaching the CD changer mechanism assembly on the top of the body. 2. Disconnect the card wire from connector CN303 on top of the main board. 3. Remove the plastic rivet a fixing the main board to the front panel assembly on the left side of the body. 4. Remove the two screws D from the rear panel. 5. Detach upward the rear part of the CD changer mechanism assembly while pulling the front panel assembly and the rear panel outward, then pull out the front part backward and upward.
Plastic rivet a Front panel assembly CD changer mechanism assembly Main board CN303
Fig.4
C
CD changer mechanism assembly Rear panel CN303 Main board
Fig.5
D
Rear panel
Fig.6
CD changer mechanism assembly Front panel assembly Pull outward Rear panel
Pull outward
Main board
Fig.7 1-6
MX-J300 Removing the front panel assembly (See Fig.8 to 12)
Prior to performing the following procedures, remove the metal cover and the CD changer mechanism assembly. 1. Disconnect the card wires from connector CN301, CN304, CN305 and the harness from CN302 on the inside of the main board. 2. Turn over the body and remove the two screws E. 3. Release the joint b on the bottom of the body and the joints c and d on both sides of the body using a screwdriver, and detach the front panel assembly toward the front. Fig.8
CN301 Main board
Main board
Front panel assembly
CN304 CN305 CN302
CN901A,CN901B
Fig.9
(Bottom)
Joint b
E
Fig.10
Front panel assembly
Front panel assembly Fig.12
Joint d
Joint c
Front panel
Fig.11 assembly 1-7
MX-J300 Removing the rear cover and the rear panel (See Fig.13 to 16)
Prior to performing the following procedures, remove the metal cover and the CD changer mechanism assembly. It is not necessary to remove the front panel assembly.
Rear panel
F
1. Remove the two screws F and the rear cover on the back of the body. 2. Remove the four screws G and the six screws H attaching the main board and the heat sink to the rear panel. 3. Remove the screw I attaching the rear panel to the base chassis. 4. Release the lower two joints e and f on both sides of the rear panel using a screwdriver and detach the rear panel backwards.
Rear cover
F
Fig.13
G (To Earth bracket) H
Rear panel
G
G H I
Fig.14
Joint e Rear panel
Fig.15
Rear panel Joint f
Fig.16 1-8
MX-J300 Removing the main board (See Fig.17 to 20)
Prior to performing the following procedures, remove the metal cover, the CD changer mechanism assembly and the rear cover, rear panel. It is not necessary to remove the front panel assembly. 1. Disconnect the card wires from connector CN301, CN304, CN305 and the harnesses from CN302, CN901A and CN901B on the inside of the main board.
Main board
CN301
CN304 CN305 CN302
CN901A,CN901B
2. From the right side of the body, remove the screw J attaching the main board to the base chassis.
Fig.17
Main board Rear panel
~To remove the heat sink from the main board~
Prior to performing the following procedure, remove the rear panel. 1. Remove the two screws K and the screw L attaching the heat sink to the main board. Remove the IC bracket 1 and 2 on the back of the heat sink. 2. Pull out the heat sink toward you.
J
Fig.18
Main board
IC bracket 2 Heat sink Heat sink
K L
Fig.19
IC bracket 1
Fig.20
1-9
MX-J300 Removing the power transformer assembly (See Fig.21 to 23)
Prior to performing the following procedure, remove the metal cover and the CD changer mechanism assembly. 1. Disconnect the harness from connector CN901A and CN901B on the inside of the main board. 2. Cut off the tie band g of the power transformer assembly and unsolder the power cord. (Make sure to bundle the wires after repair.) 3. Remove the four screws M attaching the power transformer assembly. When removing the power transformer assembly with the power cord, remove the rear panel and pull out the power cord stopper from the bottom chassis upward.
CN901A,CN901B
Tie band g
Power transformer assembly
Fig.21
M
Tie band g
M
Fig.22
Power transformer assembly
Tie band g Rear panel
Power cord stopper Power transformer assembly
Fig.23
1-10
MX-J300
Cassette mechanism assembly
Prior to performing the following procedure, remove the metal cover, the CD changer mechanism assembly and the front panel assembly. 1. Disconnect the card wire from connector CN352 on the cassette amplifier board. 2. Remove the six screws N attaching the cassette mechanism assembly. 3. Detach the cassette mechanism assembly toward you.
N
N
N
h
N
Cassette amplifier board CN352
Fig.24
Cassette mechanism board
Removing the cassette amplifier board (See Fig.25 and 26)
Prior to performing the following procedure, remove the cassette mechanism assembly. 1. Disconnect the card wire from connector CN353 on the cassette amplifier board. ATTENTION: When reconnecting the card wire, put it pass through under the harness h on the DC motor (The Flg.27 shows the details). 2. Unsolder the soldering i on the flexible wire for the cassette amplifier board head at the bottom of the cassette mechanism assembly. 3. Remove the four screws O attaching the cassette amplifier board on the bottom of the cassette mechanism assembly.
DC motor
Cassette amplifier board CN352 CN353
Fig.25
O
(Bottom)
O
Soldering i R/P head
Cassette amplifier board
Fig.26
1-11
MX-J300 Removing the rolling panel assembly (See Fig.27 to 29)
Prior to performing the following procedure, remove the metal cover, the CD changer mechanism assembly and the front panel assembly. 1. Disconnect the card wire from connector CN704 and the harness from CN706, CN707 and CN708 on the display board over the rolling panel. 2. Remove the four screws P attaching the bracket. 3. Remove the four screws Q attaching the rolling panel assembly. 4. Pull out the rolling panel assembly.
Bracket Display board
P
Q Q Q
Rolling panel assembly
Q
Fig.27
Removing the display board (See Fig.30)
CN707
Prior to performing the following procedure, remove the rolling panel assembly. 1. Disconnect the card wire from connector CN705 and the harness from CN703 on the display board. 2. Remove the two screws R attaching the display board. 3. Pull out the display board upward.
CN706
Display board
Fig.28
Display board
CN708 H.phone jack board CN704 CN703
Fig.29
R
Display board
CN705
CN703
R
Fig.30 1-12
MX-J300 Removing each board in the front panel assembly (See Fig.31 to 33)
Prior to performing the following procedure, remove the rolling panel assembly.
Eject switch board FW1004
U
V V
Power switch board FW1002
U
Volume board
~Function board 1~ (Fig.31 and 33)
V
Function board 1 (Tape / AWX) FW1002
1. Remove the two screws S attaching the function board 1. Detach the function board downwards Function board 2 (Audio / CD) while releasing it from the part k. FW1004 2. Unsolder FW1002 on the function board 1 and disconnect the harness extending from the power switch board.
S
T
Fig.31
~Function board 2~ (Fig.31)
1. Remove the three screws T attaching the function board 2. 2. Unsolder FW1004 on the function board 2 and disconnect the harness extending from the eject switch board.
Volume board
~Volume board~ (Fig.31 and 32)
1. Pull out the volume knob on the front of the front panel assembly and remove the nut attaching the volume board. 2. Unhook the two hooks j on the back of the front panel assembly and detach the volume board. Fig.32
Hooks j
~Eject switch board ~ (Fig.33)
1. Remove the four screws U attaching the eject switch board. 2. Unsolder FW1004 on the eject switch board and disconnect the harness extending from the function board 2.
V V
Power switch board FW1002 Part k Function board 1 FW1002
~Power switch board~ (Fig.31 and 33)
1. Remove the three screws V attaching the power switch board. 2. Unsolder FW1002 on the power switch board and disconnect the harness extending from the function board 1.
W
Headphone board
S
Fig.33
~Headphone board~ (Fig.33)
1. Remove the screw W attaching the headphone board.
1-13
MX-J300
Prior to performing the following procedures, remove the metal cover the CD changer mechanism assembly, the front panel assembly and the rolling panel assembly. It is not necessary to remove the display board.
Multi control assembly
Removing the multi control assembly (See Fig.34 to 36)
1. Remove the two screws X on both sides of the multi control assembly. 2. Disconnect the card wire from connector CN705 on the display board. 3. Pull outwards the joints l on both sides and detach the multi control assembly toward the front. Fig.34
X
Multi control assembly
Removing the multi control board (See Fig.37 to 39)
Prior to performing the following procedure, remove the multi control assembly. 1. Remove the six screws Y attaching the cover and the bracket. 2. Release the hooks m on both sides of the panel holder attaching the bracket and pull out the panel holders outward. Detach the multi control board with the cover and the bracket attached. 3. Remove the two screws Z attaching the multi control board.
Hook m Bracket
Fig.35
X
Multi control assembly
Joint l
Fig.36
Panel holder
CN705 Bracket
Y
Bracket
Fig.38
CN705 Multi control board
Y
Y
Cover
Fig.37
Z
Fig.39 1-14
MX-J300 Removing the drive motor assembly (See Fig.40 to 41)
Prior to performing the following procedures, remove the display board. 1. Remove the two screws A attaching the motor bracket, then detach the motor leads from the fixing plate n. 2. Remove the two screws B attaching the shaft bracket.
Shaft bracket Fixing plate n
B
A
Motor bracket
3. Remove the motor belt. 4. Pull the parts o on each side of the shaft assembly outwards and detach the shaft assembly upward. 5. Detach the drive motor assembly upward.
Fig.40
Part o
Part o
Shaft assembly
Motor belt
Drive motor assembly
Fig.41
1-15
MX-J300 A Removing the CD Servo control board (See Fig.1)
1.Remove the metal cover. 2.Remove the CD changer mechanism assembly. 3.From bottom side the CD changer mechanism assembly, remove the two screws A retaining the CD servo control board. 4.Absorb the four soldered positions "a" of the right and left motors with a soldering absorber. 5.Pull out the earth wire on the CD changer mechanism assembly. 6.The two screws B is removed and C.B.holder is detached. 7.Disconnect the connector CN854 on the CD servo control board. 8.Disconnect the card wire CN601 and the connector CN801 on the CD servo control board.
a a
CN854
A
CN651
CD servo control board
CN652 CN801 CN151
CN601
Removing the CD tray assembly (See Fig.2~4) 1. Remove the front panel assembly.
2. Remove the CD changer mechanism assembly. 3. Remove the CD Servo control board. 4. Remove the screw C retaining the lod stopper. 5. From the T.bracket section "b" and clamper base section "c" , remove both of the edges fixing the rod(See Fig.2 and 3). 6. Remove the screw D retaining the disc stopper (See Fig.3). 7. Remove the three screws E retaining the T.bracket (See Fig.3). 8. Remove the screw F retaining the clamper assembly (See Fig.3). 9. From the left side face of the chassis assembly, remove the one screw G retaining both of the return spring and lock lever(See Fig. 4). 10. By removing the pawl at the section "d" fixing the return spring, dismount the return spring(See Fig.4). 11. Remove the three lock levers(See Fig.4). T.Braket Disc stopper
Earth wire
B
B
Fig.1
C.B.Holder
Clamper base
b
Rod T.Braket
c
Fig.2
d D E a C
Lod stopper (C/J version only)
E
E F b
Lock lever Clamper ass'y
Return spring
G
Fig.4 Fig.3
1-16
MX-J300
11. Check whether the lifter unit stopper has been caught into the hole at the section "e" of CD tray assembly as shown in Fig.5. 12. Make sure that the driver unit elevator is positioned as shown in Fig.6 from to the second or fifth hole on the left side face of the CD changer mechanism assembly. [Caution] In case the driver unit elevator is not at above position, set the elevator to the position as shown in Fig.7 by manually turning the pulley gear as shown in Fig.8. 13. Manually turn the motor pulley in the clockwise direction until the lifter unit stopper is lowered from the section "e" of CD tray assembly(See Fig.8). 14. Pull out all of the three stages of CD tray assembly in the arrow direction "f" until these stages stop (See Fig.6). 15. At the position where the CD tray assembly has stopped, pull out the CD tray assembly while pressing the two pawls "g and g' " on the back side of CD tray assembly(See Fig.9). In this case, it is easy to pull out the assembly when it is pulled out first from the stage CD tray assembly. Stopper
e
CD tray assembly
Fig.5
Chassis assembly
f
CD tray assembly Drive unit of elevator
Refer to Fig.7
Pawl
g
Fig.7
Fig.6
CD tray assembly
Pulley gear
Motor pulley Pawl
Fig.8
g , g'
Fig.9
1-17
MX-J300 Removing the CD loading mechanism assembly(See Fig.10)
1. While turning the cams R1 and R2 assembly in the arrow direction "h" ,align the shaft "i" of the CD loading mechanism assembly to the position shown in Fig.10. 2. Remove the four screws H retaining the CD loading mechanism assembly. Cams R1, R2 assembly
Arrow
h i H
Removing the CD traverse mechanism (See Fig.11 and 12 )
1. For dismounting only the CD traverse mechanism without removing the CD loading mechanism assembly, align the shaft "j" of the CD loading mechanism assembly to the position shown Fig.11 while turning the cam R1 and R2 assembly in the arrow direction "k" . 2. By raising the CD loading mechanism assembly in the arrow direction "l", remove the assembly from the lifter unit
H
Cam R1, R2 assembly
H
CD loading mechanism assembly
H
Fig.10
CD traverse mechanism
Arrow
k
j
Lifter unit Arrow
k
Fig.11 Fig.12
CD Pickup unit
Removing the CD pick unit (See Fig.13 )
1. Move the cam gear in the arrow direction "m" . Then, the CD pickup unit will be moved in the arrow direction "n" . 2. According to the above step, shift the CD pickup unit to the center position. 3. While pressing the stopper retaining the shaft in the arrow direction "o" , pull out the shaft in the arrow direction "p". 4. After dismounting the shaft from the CD pickup unit, remove the CD pickup unit
n m
CD loading mechanism Shaft Cam gear
Shaft
Shaft
o
Stopper
p
Stopper
Fig.13 1-18
MX-J300 Removing the cam unit (See Fig.14 ~17 )
1. Remove the CD loading mechanism assembly. 2. While turning the cam gear "q", align the pawl "r" position of the drive unit to the notch position(Fig.16) on the cam gear "q". 3. Pull out the drive unit and cylinder gear(See Fig.17). 4. While turning the cam gear "q", align the pawl "s" position of the select lever to the notch position(Fig.18) on the cam gear "q". 5. Remove the four screws J retaining the cam unit(cam gear "q" and cams R1/R2 assembly)(See Fig.18).
Drive unit Chassis assembly
Cam gear q
Tray select switch board
r
CN802 CN801 CN804
Fig.14
I
Fig.15
Drive unit
J
Cylinder gear Cam gear q
Cams R1, R2 assembly Cam unit
J J s
Fig.16
Select lever
Fig.17
1-19
MX-J300 Removing the actuator motor and belt (See Fig.18~21)
1. Remove the two screws K retaining the gear bracket (See Fig.19). 2. While pressing the pawl "t" fixing the gear bracket in the arrow direction, remove the gear bracket (See Fig.19). 3. From the notch "u section" on the chassis assembly fixing the edge of gear bracket, remove and take out the gear bracket(See Fig. 20). 4. Remove the belts respectively from the right and left actuator motor pulleys and pulley gears(See Fig. 19). 5. After turning over the chassis assembly, remove the actuator motor while spreading the four pawls "v" fixing the right and left actuator motors in the arrow direction(See Fig. 21). [Note] When the chassis assembly is turned over under the conditions wherein the gear bracket and belt have been removed, then the pulley gear as well as the gear, etc. constituting the gear unit can possibly be separated to pieces. In such a case, assemble these parts by referring to the assembly and configuration diagram in Fig. 22. Chassis assembly Pulley gear Belt Motor pulley
Gear bracket
Pulley gear Belt Motor pulley
K
Pawl
t
K
Fig.18
Actuator motor
u v
Gear bracket
v
Fig.19
Fig.20
Assembly and Configuration Diagram
Pulley gear Gear B Pulley gear Cylinder gear
Gear B Gear C Select gear Gross gear L Gross gear U Gear C
Fig.21
1-20
MX-J300 Removing the cams R1/R2 assembly and cam gear q(See Fig.22)
Slit washer 1. Remove the slit washer fixing the cams R1 and R2 assembly. 2. By removing the two pawls "w" fixing the cam R1, separate R2 from R1. 3. Remove the slit washer fixing the cam gear "q". 4. Pull out the cam gear "q" from the C.G. base assembly. Cam gear L Slit washer Cam R2
L
Pawl Cam R1
w
Pawl
w
Removing the C.G. base assembly (See Fig.22 and 23)
Remove the three screws L retaining the C.G. base assembly. [Caution] To reassemble the cylinder gear, etc.with the cam unit (cam gear and cans R1/R2 assembly), gear unit and drive unit, align the position of the pawl "x" on the drive unit to that of the notch on the cam gear "q". Then, make sure that the gear unit is engaged by turning the cam gear "q" (See Fig. 24).
Cam switch board C.G. base assembly
Fig.22
Cam gear L Cam R1, R2 assembly
Notch
Pawl
x
Gear unit
Cylinder gear
Drive unit
Gear bracket
Fig.23
1-21
MX-J300 < Cassette mechanism section > Removing the R/P head assembly (See Fig.1to2)
1. Unsolder the head mechanism board. wire from the cassette
R/P head assembly
2. Remove the two screws A retaining the R/P head assembly. Refer to the figure for soldering
A
Cassette mechanism board Sold part
A
Fig.1
Fig.2
Removing the R/B head assembly (See Fig.3)
1. Loosen the screw B attaching the P/B head. 2. Remove the screws C retaining the R/B head assembly.
B
C
Removing the Pinch roller assembly (See Fig.4)
1. Pull the tab a outward and remove the pinch roller upward.
Fig.3
Tab a
Pinch roller
Fig.4
1-22
MX-J300 Removing the Capstan motor (See Fig.5 to 7)
1. Remove the two screws D attaching the capstan motor. 2. Unsolder the motor wire.
Motor wire Marke red line Un solder
D
Cassette mechanism assembly
Fig.5
Capstan motor
Fig.6
Removing the Capstan belt (See Fig.7)
1. Remove the capstan motor. 2. Remove the capstan belt. ATTENTION: Do not stain the belt with grease.
Capstan motor FR belt
Sold part FR belt
Capstan belt
Fig.7
1-23
MX-J300
Adjustment method
Measurement instruments required for adjustment
1. Low frequency oscillator, This oscillator should have a capacity to output 0dBs to 600ohm at an oscillation frequency of 50Hz-20kHz. 2. Attenuator impedance : 600ohm 3. Electronic voltmeter 4. Frequency counter 5. Wow flutter meter 6. Test tape VT712 : For Tape speed and wow flutter ( 3kHz) VT703 : For Head angle(10kHz),Play back frequency characteristics(1kHz),and dubbing frequency characteristics(63,1,10kHz) Because of frequency-mixed tape with 63,1k,10k and 14kHz(250nWb/m -24dB). Use this tape together with a filter. 7. Blank tape TAPE : AC-225, TAPE : AC-514 8. Torque gauge : For play and back tension Forward ; TW2111A, Reverse ; TW2121A Fast Forward and Rewind ; TW2231A 9. Test disc : CTS-1000(12cm),GRG-1211(8cm) 10. Jitter meter Radio input signal AM modulation frequency : 400Hz Modulation factor : 30% FM modulation frequency : 400Hz Frequency displacement : 22.5kHz Frequency Range AM 531kHz~1710kHz FM 87.5MHz~108MHz
Standard measurement positions of volume and switch Power : Standby (Light STANDBY Indicator) S,A,BASS : OFF Sound mode : OFF Main VOL. : 0 Minimum Travers mecha set position : Disc 1
Measurement conditions
Power supply voltage AC120V(60Hz) Measurement output terminal : Speaker out :TP101(Mesuring for TUNER/DECK/CD) :Dummy load 6ohm
Precautions for measurement 1. Apply 30pF and 33kohm to the IF sweeper output side and 0.082 F and 100kohm in series to the sweeper input side. 2. The IF sweeper output level should be made as low as possible within the adjustable range. 3. Since the IF sweeper is a fixed device, there is no need to adjust this sweeper. 4. Since a ceramic oscillator is used, there is no need to perform any MPX adjustment. 5. Since a fixed coil is used, there is no need to adjust the FM tracking. 6. The input and output earth systems are separated. In case of simultaneously measuring the voltage in both of the input and output systems with an electronic voltmeter for two channels, therefore, the earth should be connected particularly. 7. In the case of BTL connection amplifier, the minus terminal of speaker is not for earthing. Therefore, be sure not to connect any other earth terminal to this terminal. This system is of an OTL system.
1-24
MX-J300 Arrangement of adjusting positions
Cassette mechanism section (Mechanism A section)
Cassette mechanism section (Back side)
Head azimuth adjusting screw (Forward side)
Head azimuth adjusting screw (Reverse side)
Head azimuth adjusting screw (Forward side)
Playback head
Head azimuth adjusting screw (Reverse side)
Playback,recording and eraser heads or playback head
Tape recorder section
Items Confirmation of head angle Measurement conditions Test tape VT703(10kHz) Measurement output terminal :Speaker terminal Speaker R (Load resistor:3ohm) :Headphone terminal Measurement method 1.Playback the test tape VT703(10kHz). 2.With the playback mechanism or recording & playback mechanism, adjust the head azimuth screw so that the forward and reverse output levels become maximum.After adjustment,lock the head azimuth at least by half a turn. 3.In either case,this adjustment should be performed in both the forward and reverse directions with the head azimuth screw.
Confirmation of tape speed
Test tape :VT712(3kHz) Measurement output terminal :Headphone terminal
Tape speed of decks (A and B) :3,000Hz 60Hz
Volume Inside of capstan motor
1-25
MX-J300 Reference values for confirmation items
Items Double tape speed Measurement conditions Test tape :VT703(10kHz) Measurement output terminal :Speaker terminal Speaker R (Load resistance:3ohm) measurement output terminal :Headphone terminal Measurement method After setting to the double speed motor, confirm that the frequency counter reading becomes 4,800+400/-300Hz when the test tape VT712 (3kHz) has been play back with the playback mechanism. Adjusting Standard positions values 4,800+400/ Playback -300Hz mechanism side
Difference between the forward and reverse speed. P.mecha and R/P mecha speed Wow & flutter Test tape :VT703(10kHz) Measurement output terminal :Headphone terminal
When the test tape VT712(3kHz) has been played back with the playback mechanism or recording and playback mechanism at the beginning of forward winding, the frequency counter reading of the difference between both of the mechanisms should be 6.0Hz or less.
60Hz or less
Both the playback and recording & playback mechanism
When the test tape VT712(3kHz) has been played back with the playback mechanism or recording and playback mechanism at the beginning of forward winding the frequency counter reading of wow & flutter should be 0.25% or less(WRMS).
with in 0.25% JIS(WTD)
Both the playback and recording & playback mechanism
Reference values for electrical function confirmation items
Measurement conditions Recording *Recording and bias frequency playback side forward or reverse *Test tape :TYP AC-514 *Measurement terminal BIAS TP on P.C.board Eraser current *Recording and (Reference playback side forward value) or reverse *Recording mode *Test tape :AC-514 and AC-225 Measurement terminal Both of the eraser head Items Measurement method 1.While changing over to and from BIAS 1 and 2, confirm that the frequency is changed. 2.With the recording and playback mechanism. load the test tape (AC-514 to TYP ),and set the mechanism to the recording and pausing conditions in advance. 3.Confirm that the BIAS TP frequency on the P.C.board is 100kHz 6kHz. 1.With the recording and playback mechanism, load the test tapes(AC-514 to TYP and AC-225 to TYP ),and set the mechanism to the recording and pausing condition in advance. 2.After setting to the recording conditions, connect 1Mohm in series to the eraser head on the recording and playback mechanism side, and measure the eraser current from both of the eraser terminal. Standard values 100kHz +9kHz -7kHz Adjusting positions
TYP :120mA TYP :75mA
1-26
MX-J300
Flow of functional operation until TOC read
Check Point
Power ON
Play Key
Slider turns REST SW ON.
Confirm that the voltage at the pin5 of CN801 is "H"\"L"\"H".
Automatic tuning of TE offset
Check that the voltage at the
Laser ON
pin40 of IC651 is + 5V?
Detection of disc
Automatic tuning of Focus offset Confirm that the Focus error S-cuve signal at the pin28 of IC651 is approx.2Vp-p Confirm that the signal from pin24 IC651 is 0V as a accelerated pulse during approx.400ms.
Automatic measurement of Focus S-curve amplitude
Disc is rotated
Tracking error waveform at TOC reading pin 25 of IC601(TE)
Approx 1.8V VREF
Approx.3sec
Focus servo ON (Tracking servo ON) Confirm the waveform of the Tracking error signal. at the pin 25 of IC601 (R604) (See fig-1)
Automatic measurement of Tracking error amplitude
Tracking Disc to be servo braked to stop on states TOC reading finishes Automatic measurement of TE amplitude and 500mv/div automatic tuning of 2ms/div Fig.1 TE balance Tracking servo off states
Disc states to rotate
Automatic tuning of Tracking error balance
Automatic tuning of Focus error balance
Automatic tuning of Focus error gain
Automatic tuning of Tracking error gain
TOC reading
Confirm the eys-pattern at the lead of TP1
Play a disc
1-27
MX-J300
Maintenance of laser pickup
(1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab. (2) Life of the laser diode When the life of the laser diode has expired, the following symptoms will appear. 1. The level of RF output (EFM output:ampli tude of eye pattern) will below.
Replacement of laser pickup
Turn off the power switch and,disconnect the power cord from the AC outlet.
Replace the pickup with a normal one.(Refer to "Pickup Removal" on the previous page)
Is the level of RFOUT under 1.25V 0.22Vp-p?
NO
Replace it.
Plug the power cord in,and turn the power on. At this time,check that the laser emits for about 3seconds and the objective lens moves up and down. Note: Do not observe the laser beam directly.
YES O.K Play a disc.
Check the eye-pattern at TP1.
Finish.
(3) Semi-fixed resistor on the APC PC board The semi-fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser power.Since this adjustment should be performed to match the characteristics of the whole optical block, do not touch the semi-fixed resistor. If the laser power is lower than the specified value,the laser diode is almost worn out, and the laser pickup should be replaced. If the semi-fixed resistor is adjusted while the pickup is functioning normally,the laser pickup may be damaged due to excessive current.
1-28
MX-J300
Description of major ICs
BA6897FP-W(IC801): 4channel driver
1.Pin layout & Block diagram
CH4-OUTB CH3-OUTB C H 4 - O U TA C H 3 - O U TA OP IN(+)
16
CH4-INA
CH4-INB
CH3-INB
CH3-INA
28
27
26
25
24
23
22
21
20
19
18
17
15
D.BUF
D.BUF
10K 13.3K
Vcc
Vcc
10K
Level shift
REGULATOR 10K T.S.D 50K 10K Level shift Level shift 50K DRIVER MUTE
Level shift
D.BUF
13.3K
D.BUF
13.3K
13.3K 10K
D.BUF
D.BUF
10K
D. B U F
1
2
3
4
5
6
7
8
9
10
11
12
13
D. B U F
14
Tr - B Vreg OUT
C H 1 - O U TA
CH1-OUTB
CH2-OUTB
C H 2 - O U TA
CH1-INA
CH1-INB
CH2-INB
CH2-INA
T.S.D;Thermal shutdown
OP-OUT
D.BUF:Drive buffer
MUTE
GND
2.Pin function Pin Symbol NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14
CH1-OUTA CH1-OUTB CH1-INA CH1-INB Tr-B Vreg OUT MUTE GND CH2-INB CH2-INA CH2-OUTB CH2-OUTA GND OPOUT
Function Driver CH1 - output Driver CH1 + output Driver CH1 input Connect to the base of external Tr Fixed voltage output Mute control terminal GND Driver CH2 input Driver CH2 + output Driver CH2 - output Sub-slate GND Operation amplifier output
Pin Symbol NO. 15 16 17 19 20 21 22 24 25 26 27 28
OP IN(-) OP IN(+) CH3-OUTA CH3-OUTB CH3-INA CH3-INB Vcc Vcc BAIS IN CH4-INB CH4-INA CH4-OUTB CH4-OUTA GND
Function Operation amplifier - input Operation amplifier + output Driver CH3 - output Driver CH3 + output Driver CH3 input Driver CH3 gain adjustment Input terminal Power supply terminal Power supply terminal Bias amplifier input terminal Driver CH4 gain adjustment Input terminal Driver CH4 input Driver CH4 + output Driver CH4 - output Sub-slate GND
Driver CH1 gain adjustment Input terminal 18
Driver CH2 gain adjustment Input terminal 23
GND
OP IN(-)
BIAS IN
GND
Vcc
Vcc
1-29
MX-J300 AN8806SB-W (IC601) : RF&Servo AMP
1.Pin layout
PD LD LDON LDP VCC RFRF OUT RF IN C.AGC ARF C.ENV C.EA CS BDO BDO CS BRT OFTR /NRFDET GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 PDAC PDBD PDF PDE PDER PDFR TBAL FBAL EFEF OUT TETE OUT CROSS TE BPF VDET LD OFF VREF ENV
2.Block diagram
6 7 29 28 27 8 9 10 17 11 12 19
-+ -- +
-+
EQ AGC
RF DET
ENV CURCUIT
36
-+
+ VCBA --
-+
OFTR
13
BDO
14 15 16
35
-+
+ VCBA --VCBA +
31
34
-+ -VCBA + -+ + -+ -30 24 25 26 23 22 1 4 3
-+
20
32
-+ -- +
-- +
-- +
21
33
2
1-30
MX-J300
3. Pin function
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
Symbol
PD LD LD ON LDP VCC RFRF OUT RF IN C.AGC ARF C.ENV C.EA CS BDO BDO CS BRT OFTR /NRFDET GND ENV VREF LD OFF VDET TE BPF CROSS TE OUT TEFE OUT FEFBAL TBAL PDFR PDER PDF PDE PD BD PD AC
I/O
I O I --I O I I/O O I/O I/O I/O O I/O O O -O O -O I O O I O I I I I/O I/O I I I I
APC amp input terminal APC amp output terminal APC ON/OFF control terminal
Description
Connect to ground Power supply Inverse input pin for RF amp RFamp output RF input Connecting pin of AGC loop filter RF output A capacitor is connected to this terminal to detect the envelope of RF signal A capacitor is connected to this terminal to detect the envelope of RF signal A capacitor is connected to detect the lower envelope of RF signal BDO output pin A capacitor is connected to detect the lower envelope of RF signal Of-track status signal output RF detection signal output Ground Envelope output Reference voltage output Connect to ground Vibration detection signal output Input pin of tracking error through BPF Tracking error cross output Tracking error signal output Inverse input pin for tracking error amp Output pin of focus error Inverse input pin for focus error amp Focus balance control Tracking balance control F I-V amp gain control E I-V amp gain control I-V amp input I-V amp input I-V amp input I-V amp input
1-31
MX-J300 BA15218F(IC303):OP AMP.
OUT1 1 -IN1 2 +IN1 3 VEE 4 1 + 2 + -
8 VCC 7 OUT2 6 -IN2 5 +IN2
BA3126N(IC31) : R/P Switch
C O NT .
GND
REC SW
Vcc
1
2
3
4
5
6
7
8
9
TA8409S(IC851,IC852):Motor driver
1.Pin layout
IN2 1 VCC 2 OUT 2 3 GND 4 GND 5 VS 6 OUT 1 7 VR 8 IN1 9 TA8409S
2.Pin function
INPUT IN1 IN2 0 1 0 1 0 0 1 1 H L L L H L OUTPUT OUT1 OUT2 MODE MOTOR STOP CW/CCW CCW/CW BRAKE
1-32
REC SW
P/B SW
P/B SW
G
G
MX-J300 LC72136N (IC2) : PLL Frequency synthesizer
1. Pin layout
XT FM/AM CE DI CLOCK DO FM/ST/VCO AM/FM 1 2 3 4 5 6 7 8 9 10 SDIN 11 22 21 20 19 18 17 16 15 14 13 12 XT GND LPFOUT LPFIN PD VCC FMIN AMIN IFCONT IFIN
2. Block
Phase Detector Charge Pump
1 22
Reference Driver
18 19 20
16
1/2
Swallow Counter 1/16,1/17 4bit
Unlock Detector
15
12bit Programmable DriverS 12
3 4 5 6 17 21 Power on Reset C2B I/F Universal Counter
Data Shift Register & Latch
7
8
2
11 13
3. Function
Pin No. 1 2 3 Symbol XT FM/AM CE I/O I O I Function X'tal oscillator connect (75kHz) LOW:FM mode When data output/input for 4pin(input) and 6pin(output): H 4 DI I Input for receive the serial data from controller 5 6 CLOCK DO I O Sync signal input use Data output for Controller Output port 7 FM/ST/VCO O "Low": MW mode 18 PD O 16 17 FMIN VCC I FM Local OSC signal input Power suplly(VDD=4.5-5.5V) When power ON:Reset circuit move PLL charge pump output(H: Local OSC frequency Height than Reference frequency. L: Low Agreement: Height impedance) 8 9 10 11 AM/FM LW MW SDIN O I/O I/O I/O Open state after the power on reset Input/output port Input/output port Data input/output 19 20 21 22 LPFIN LPFOUT GND XT I O I Input for active lowpassfilter of PLL Output for active lowpassfilter of PLL Connected to GND X'tal oscillator(75KHz) 15 AMIN I AM Local OSC signal output Pin No. 12 13 14 Symbol IFIN IFCONT I/O I O Function IF counter signal input IF signal output Not use
1-33
MX-J300 MN35510 (IC651) : DIGITAL SERVO&DIGITAL SIGNAL PROCESSER
1. Terminal Layout
21 ~ 40 41 ~ 60 20 ~ 1 80 ~ 61
2.Block Diagram
LRCKIN(MSEL) BCLK(SSEL) SRDATAIN (PSEL) IOSEL CLVS CRC BLKCK CLDCK SBCK SUBC DEMPH RESY FLAG6(RESY) SSEL SQCK SUBQ AVDD2 AVDD2 PCK EFM PLLF DSLF IREF DRF ARF RSEL PSEL MLD MCLK MDATA CK384(EFM) VCOF BYTCK SMCK FCLK CSEL MSEL X2 X1 ĘSTAT OUTPUT PORT MICRO COMPUTER INTERFACE CLV SERVO D/A CONVERTER SUB CODE BUFFER EFM DEMODULATION SYNC INTERPOLATION SUBCODE DEMODULATION CIRC ERROR CORRECTION DEINTERLEVE 16k SRAM 8TIMES OVER SAMPUNC DIGITAL FILTER PEM (R) 1BIT DAC LOGIC S PEM (L) AVSS1 AVDD1 OUTR
DIGITAL DEEMPHSIS
OUTL
FLAG IPFLAG DIGITAL AUDIO INTERFASE DIGITAL AUDIO INTERFASE INTER POLATION SOFT MUTING DIGITAL ATTENUATION PEAK DETECTIVE AUTO CUE TX
ECM PC LRCK SRDATA BCLK DMUTE TRKV KICK VREF TRVSTR ECS TVD TRD FOD TBAL FBAL TOFS TES /TLOCK /FLOCK PLAY LDON WVEL SENSE
DSL. PLL VCO
VCO ITUNING GENERATION PITCH CONTROL
A/D COVERTER
INPUT
SERVO TIMING GENERATOR
V V D S D S
D V D D 1
D / / V R T S S E S T S 1 T
F E
T E
R F E N V
T R C R S
V D E T
B D O
/ R F D E
O F T
1-34
MX-J300
3. Description
Pin No. 1 2 3 4 5 6 7 8 9 symbol I/O BCLK LRCK O Not used O Not used Description Pin No. 41 symbol TES I/O Description O Tracking error shunt signal output(H:shunt) Not used Not used RF signal input Reference current input pin Bias pin for DSL I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
42 PLAY 43 44 WVEL ARF
SRDATA O Not used DVDD1 DVSS1 TX MCLK MDATA MLD Power supply (Digital) Connected to GND I
45 IREF 46 DRF 47 DSLF 48 PLLF 49 VCOF 50 51 52 53 54 AVDD2 AVSS2 EFM PCK PDO
O Digital audio interface output I I I com command clock signal input (Data is latched at signal's rising point) com command data input com command load signal input
I
I/O Loop filter pin for DSL I/O Loop filter pin for PLL Not used Power supply(Analog) Connected to GND(Analog) Not used Not used Not used Not used Not used Connected to GND(for X'tal oscillation circuit) Input of 16.9344MHz X'tal oscillation circuit
10 SENSE 11 12 13 15 FLOCK TLOCK BLKCK SUBQ
O Not used O Not used O Not used O sub-code block clock signal output I Outside clock for sub-code Q resister input O Sub-code Q -code output Connected to GND I
14 SQCK
55 SUBC 56 SBCK 57 58 VSS XI
16 DMUTE
Status signal 17 STATUS O (CRC,CUE,CLVS,TTSTOP,ECLV,SQOK) 18 19 20 21 22 23 RST SMCK PMCK TRV TVD PC I I Reset signal input (L:Reset) Not used Not used
59 X2 60 61 VDD BYTCK
O Output of X'tal oscillation circuit Power supply(for X'tal oscillation circuit) Not used Not used Not used Not used Not used Not used Not used Not used Not used pull up pull up Power supply(Digital)
O Traverse enforced output O Traverse drive output Not used Spindle motor drive signal (Enforced mode output) 3-State Spindle motor drive signal (Servo error O signal output) O Kick pulse output I
I
62 CLDCK 63 FCLK 64 IPPLAG 65 FLAG
24 ECM 25 26 ECS KICK
O
66 CLVS 67 68 CRC DEMPH
27 TRD 28 FOD
O Tracking drive output O Focus drive output I Reference voltage input pin for D/A output block (TVD,FOD,FBA,TBAL)
29 VREF 30 31 32 33 34 35 36 FBAL TBAL FE TE RF ENV VDET OFT
69 RESY 70 IOSEL 71 72 73 74 75 TEST AVDD1 OUT L AVSS1 OUT R
O Focus Balance adjust signal output O Tracking Balance adjust signal output I I I I I I I I Focus error signal input(Analog input) Tracking error signal input(Analog input) RF envelope signal input(Analog input) Vibration detect signal input(H:detect) Off track signal input(H:off track) Track cross signal input RF detect signal input(L:detect) BDO input pin(L:detect)
O Lch audio output Connected to GND pull up Connected to GND Connected to GND Connected to GND Pull up
O Rch audio output
76 RSEL 77 CSEL 78 PSEL 79 MSEL
37 TRCRS 38 39 40 RFDET BDO LDON
O Laser ON signal output(H:on)
80 SSEL
1-35
MX-J300 UPD78055GCA37 (IC251):CD Changer control
1. Terminal Layout
20 ~ 21 ~ 40 41 ~ 60 1 80 ~ 61
2. Pin function
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 symbol I/O DEMPH I I I I Description Deemphasis input On screen display on/off Connected to GND Mode control select SUB Ready Pin No. 41 42 43 44 45 46 47 48~59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 RESET STAT HREG HRDY DRMUTE MCLK MDATA MLD VDD X2 X1 IC XT2 REST AVDD AVREF SSEL MSEL PSEL IOSEL P ON I I Symbol I/O L CAM down R CAM up R CAM down Not used Not used Not used Not used connected to GND VC3 reset out Statues signal Description
LM DOWN O RM UP RMDOWN CHECK CHECK1 CHECK2 CHECK3 O O I I I I
DEMPHO O Deemphasis output OS OFF AVSS MCS MRDY AVREF1 KCMND MSTAT KCLK SUB RST SQCK DMUTE MREQ
- AV reference SVC3 Serial data out put O SVC3 Status input input I SVC3 Serial clock input I Sub-code Q code output O Reset signal input (L : Reset) I I Outside clock for sub-code Q resister input Digital mute
O Not used I O I I I Not used BTL Driver mute com command clock signal input com command data input com command lode signal input
O Not used VCDEMP - Not used SRDATA - Not used SRCLK I Not used CAM SW input Sub tray SW input Sub tray SW output Connected to GND Disk sensor Test mode(Not used) Test mode(Not used) Test mode(Not used) Test mode(Not used) Not used L CAM up
I 30~32 3~1MSW I 33 VSS 34 35 36 37 38 39 40 DISC SHIFT MNT MNT1 MNT2 I I I I I
19~26 CAM0~7 27~29 1~3SSW
Power supply (for X' tal Q oscillation circuit) O Out of X' tal oscillation circuit I Input of 16.9344MHz X' tal oscillation circuit I connected to GND Not used Rest SW input A/D converter power supply Digital GND Not used Not used Not used
-
VCORST O LMUP
O Data select out O Power ON/OFF
1-36
MX-J300
VICTOR COMPANY OF JAPAN, LIMITED AUDIO & COMMUNICATION BUSINESS DIVISION PERSONAL & MOBILE NETWORK B.U. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
No.20818
Printed in Japan 200007(V)