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MX-G500
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
MX-G500
Area suffix
J ------------------- U.S.A. C ---------------- Canada
DISC CHANGE
STAND BY
1
2
STANDBY/ON
3 CD
CD
CD
CD-R/RW PLAYBACK
MX -G500
SOUND MO DE
STAN DBY/ ON
CLOCK /TIMER
1
SLEEP
2 5 8
+1 0
3 6 9
SUBW OOFER LEVEL
4
AUX
DISPLAY
SOUN D M ODE
7 10
EXTEN DED SUPER BA SS
FM M ODE
AUX
FM /A M TAPE TAPE A/B FADE M UTIN G
FM / AM
CD
TAPE
CD
DISC SKIP
PHONES
REPEAT
PROGRAM
RANDOM
TAPE A
TAPE B
+
VOLUM E
REC START / STOP
CD REC START
SUBW OOFER LEVEL
DUBBING
COMPU
PL AY
C ON TROL
VOLUM E
FULL - L OGIC CONT ROL
CD SYN CHRO RECORDIN G
RM SMXG500 A R EM OTE CONT ROL
SP-MXG500
CA-MXG500
CD
3
SP-MXG500
Contents
Safety Precautions Importance administering point on the safety Preventing static electricity Disassembly method Wiring connection Adjustment method 1-2 1-3 1-4 1-5 1-18 1-19 Flow of functional operation until TOC read Maintenance of laser pickup Replacement of laser pickup Trouble shooting Description of major ICs 1-23 1-24 1-24 1-25 1-28~41
COPYRIGHT
2002 VICTOR COMPANY OF JAPAN, LTD.
No.21068 Feb. 2002
MX-G500
1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only. 2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturer`s warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom. 3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards. 4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling. 5. Leakage currnet check (Electrical shock hazard testing) After re-assembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. Do not use a line isolation transformer during this check. Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.). Alternate check method Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground. AC VOLTMETER Measure the AC voltage across the resistor with the AC (Having 1000 ohms/volts, voltmeter. or more sensitivity) Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to 0.15 F AC TYPE the chassis, and meausre the AC voltage across the resistor. Place this Now, reverse the plug in the AC outlet and repeat each probe on measurement. Voltage measured any must not exceed 0.75 V each exposed AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1500 10W metal part.
Good earth ground
1. This equipment has been designed and manufactured to meet international safety standards. 2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained. 3. Repairs must be made in accordance with the relevant safety standards. 4. It is essential that safety critical components are replaced by approved parts. 5. If mains voltage selector is provided, check setting for local voltage.
! Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.
In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " " mark nearby are critical for safety. (This regulation does not correspond to J and C version.)
1-2
MX-G500
Importance administering point on the safety
RFS5
4A 125V 4A 125V 4A 125V 4A 125V
RFS6
RFS7
4A 125V
RFS2
RFS8
Fuse board (Forward side)
Power supply board (Forward side)
Caution: For continued protection against risk of fire, replace only with same type 4A/125V for RFS2, RFS5, RFS6, RFS7 and RFS8. This symbol specifies type of fast operating fuse. Precaution: Pour eviter risques de feux, remplacez le fusible de surete de et RFS2, RFS5, RFS6, RFS7 et RFS8 comme le meme type que 4A/125V. ^ Ce sont des fusibles suretes qui functionnes rapide.
1-3
MX-G500
Preventing static electricity
1. Grounding to prevent damage by static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
2. About the earth processing for the destruction prevention by static electricity
In the equipment which uses optical pick-up (laser diode), optical pick-up is destroyed by the static electricity of the work environment. Be careful to use proper grounding in the area where repairs are being performed.
2-1 Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it.
2-2 Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(caption) Anti-static wrist strap Conductive material (conductive sheet) or iron plate
3. Handling the optical pickup
1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.) 2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily destroy the laser diode.
4. Handling the traverse unit (optical pickup)
1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit. 2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector. 3. Handle the flexible cable carefully as it may break when subjected to strong force. 4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it
Attention when CD mechanism assembly is decomposed
*Please refer to "Disassembly method" in the text for pick-up and how to detach the CD mechanism assembly. 1. Remove the CD changer unit. 2. Remove the CD changer mechanism. 3. Solder is put up before the card wire is removed from the pickup unit connector on the CD mechanism assembly. (When the card wire is removed without putting up solder, the CD pick-up assembly might destroy.) 4. Please remove solder after connecting the card wire with the pickup unit connector when you install picking up in the substrate.
Card wire Picup unit connector
CD changer unit
CD changer mechanism
Fig.1
Card wire
Soldering Fig.2 1-4
Picup unit connector
MX-G500
Disassembly method
Removing the metal cover (See Fig.1)
1. Remove the three screws A attaching the metal cover on the back of the body. 2. Remove the six screws B attaching the metal cover on the both sides of the body. 3. Remove the metal cover from the body by lifting the rear part of the cover. ONE POINT How to eject the CD tray (see fig.2) Although it will end if the OPEN/CLOSE button is pushed when a power supply can be taken, when that is not right, CD tray will be opened manually. Turn the loading pulley gear at the bottom of the CD changer unit as shown in Fig.2 and draw the CD tray toward the front.
Metal cover
A
(both sides)
B
Fig.1
Loading pulley gear (See fig.1)
Removing the CD Tray fitting (See Fig. 3)
Prior to performing the following procedure, eject the CD tray. 1. After drawing the lower part of the tray fitting toward the front, remove the five claws. Then, while moving the tray fitting upward, remove it.
CD tray fitting
Fig.2
Joint
Removing the CD changer unit (See Fig.4 to 7)
Prior to performing the following procedure, remove the metal cover. 1. Remove the card wire attached to CD changer unit on the adhesion tape.
Claw
2. Disconnect the card wire from the connector CW107 on the CD servo board. 3. Disconnect the harness from the connector RCW6 on the main board and CW105 on the CD servo board. 4. Remove the two screws C attaching the CD changer unit to the rear panel. 5. Remove the two screws D attaching the CD changer unit to the both side of front panel assembly. 6. Draw the CD changer unit upward from behind while pulling the rear panel outward.
Adhesion tape
Fig.3
Card wire CD changer unit
Fig.4 1-5
MX-G500
CW107 CW105
CD servo board
C
Rear panel
CD changer unit
RCW6
Fig.6
Front panel assembly
CD changer unit
Main board
Fig.5
(both sides) Rear panel
D
Fig.7
Removing the front panel assembly (See Fig.8 to 10)
Prior to performing the following procedure, remove the metal cover and the CD changer unit. 1. Disconnect the card wire from the connector FCW3 on the main board. 2. Disconnect the harness from the connector JCW1, JCW2 and HCW3 on the main board. 3. Remove the two screws E attaching the front panel assembly to both sides of the body.
Front panel assembly
FCW3 JCW2 JCW1 HCW3
Main board
ACW1 ACW2
Amp. board
4. Remove the screw F attaching the earth terminal Joint1 extending from the cassette mechanism assembly. (both sides) 5. Remove the screw G attaching the main board to front panel assembly. 6. Remove the screw H attaching the front panel assembly to the bottom of the body. 7. Release the two joints1 and two joints2, and detach the front panel assembly toward the front.
E
(both sides)
F(fixing the earth wire)
Fig.8
Front panel assembly
Main board
G
Joint1 (both sides)
Fig.9
E
(both sides)
1-6
MX-G500
Joint2
(Bottom side)
Removing the heat sink & amp. board (See Fig.8, 11 and 12)
Prior to performing the following procedure, remove the metal cover and the CD changer unit. 1. Disconnect the card wire from the connector ACW1 and the harness from the connector ACW2 on the amp. board.
H
Fig.10
Rear panel
I
2. Remove the four screws I attaching the heat sink cover to the rear panel. Remove the heat sink cover. 3. Remove the four screws J attaching the heat sink and two screws K attaching the speaker terminal to the rear panel. 4. After moving the heat sink upward, remove the claws. Then pull out the heat sink & amp. board inward.
Heat sink cover
I
Fig.11
Removing the tuner board (See Fig.12 and 13)
Rear panel
J Prior to performing the following procedure, remove the metal cover. Heat sink
1. Disconnect the card wire from the connector CON01 on the tuner board. 2. Remove the two screws L attaching the tuner board to the rear panel.
L M K
J
Speaker terminal
Removing the rear panel
(See Fig.12)
N
Fig.12
Rear panel Main board CON01
Prior to performing the following procedure, remove the metal cover, CD changer unit, heat sink & amp. board and tuner board. 1. Remove the two screws M and three screws N attaching the rear panel.
Tuner board
Fig.13
1-7
MX-G500
Removing the main board
(See Fig. 14)
FCW3 JCW2 JCW1 Main board Fuse board PCW1 Power supply board RCW2 Power cord Power cord stopper Heat sink Bottom chassis HCW3
Prior to performing the following procedure, remove the metal cover, CD changer unit and rear panel. 1. Disconnect the card wire from the connector FCW3 and the harness from the connector JCW1, JCW2 and HCW3 on the main board. 2. Disconnect the harness from the connector PCW1 on the fuse board. 3. Remove the screw G attaching the main board holder to the front panel assembly. (See Fig.9) 4. Remove the two screws O attaching the heat sink to bottom chassis.
O
Fig.14
Removing the power cord
(See Fig. 14)
Prior to performing the following procedure, remove the metal cover, CD changer unit and rear panel. 1. Disconnect the power cord from the connector RCW2 on the power supply board and pull up the power cord stopper upward.
P
Heat sink
Amp. board
Removing the power ICs (See Fig.15 and 16)
Prior to performing the following procedure, remove the metal cover, CD changer unit and heat sink & amp. board. 1. Remove the four screws P attaching the power ICs to the heat sink. 2. Unsolder the power ICs solder point.
Fig.15
Power ICs solder point Heat sink
Amp. board (reverse side)
Removing the power transformer (See Fig .17)
Prior to performing the following procedure, remove the metal cover, CD changer unit and heat sink & amp. board. 1. Disconnect the power cord from the connector RCW2 on the power supply board.
Fig.16
Power transformer PCW1
Fuse board
Q
R
Power supply board RCW2
2. Disconnect the harness from the connector PCW1 on Bottom chassis the fuse board. 3. Remove the four screws Q attaching the power transformer and the screw R attaching the earth terminal on the bottom chassis.
1-8
Fig.17
MX-G500
Prior to performing the following procedure, remove the metal cover, the CD changer unit and the front panel assembly.
Front panel assembly (inner side)
A B
UCW2 UCW3
Power / CD switch board
UCW1 FL diplay & system control board
Removing the power / CD switch board (See Fig.1)
1. Disconnect the card wire from the connector UCW1 on the power / CD switch board. 2. Remove the five screws A attaching the power / CD switch board.
B
UCW4 UCW5 UCW6
Removing the FL display & system control board (See Fig.1)
1. Disconnect the card wire from the connector UCW3, UCW4, UCW5 and UCW6 on the FL display & system control board. 2. Remove the six screws B attaching the FL display & system control board.
Sound mode knob
Fig.1
3. Disconnect the card wire from the connector UCW2 on the FL display & system control board.
Volume knob Subwoofer level knob
Removing the headphone jack board (See Fig.3)
Prior to performing the following procedure remove the FL display & system control board. 1. You can pull out the headphone jack board. Fig.2
Removing the front key switch board (See Fig.2 and 3)
Prior to performing the following procedure, remove the FL display & system control board. 1. Pull out the sound mode knob, volume knob and subwoofer level knob from front side. 2. Remove the twelve screws C attaching the front key switch board. 3. Remove the front board releasing the two tabs.
Front panel assembly (inner side)
Front key switch board
C
UCW7 Tab
C
Tab
Headphone jack board
D D
Removing the cassette mechanism assembly (See Fig.3)
1. Disconnect the card wire from the connector on the mecha. board. 2. Remove the six screws D attaching the cassette mechanism assembly.
Mecha. board
D
(fixing the earth wire) Connector
Cassette mechanism assembly
Fig.3
1-9
MX-G500
Prior to performing the following procedure, remove the CD changer unit.
CD servo board CW103
CD changer uint (reverse side)
Removing the CD tray (See Fig.1 to 3)
1. Turn the black loading pulley gear on the under side of the CD changer unit in the direction of the arrow and draw the CD tray toward the front until it stops. 2. Disconnect the card wire from connector CW103 on the CD servo board. 3. Push down the two tray stoppers marked a and pull out the CD tray.
CD tray
Loading pulley gear
CD tray
Fig.1
Reinstall the CD tray
(See Fig.4 to 5)
Fig.2
a (Tray stopper)
1. Align the gear-cam with the gear-tray as shown fig.4, then mount the CD tray. 2. When assembling the CD tray, take extreme care not engage with gear - synchro.
CD tray
a (Tray stopper) CD servo board CW103
Fig.3
Gear-cam
Gear-tray
Gear-convert
Gear-cam timing point Gear-tray CD tray
Gear-synchro
Gear-convert
Gear-tray
Fig.4
Fig.5
1-10
MX-G500
Removing the sensor board / the turn table motor assembly (See Fig.6 to 8)
Prior to performing the following procedure, remove the CD tray. 1. Remove the screw A attaching the sensor board and release the two tabs b attaching the sensor board on the under side of the CD tray. 2. Disconnect the harness from connector CW1 on the sensor board and release the harness from the two hooks c. Remove the sensor board. 3. Remove the screw B attaching the turn table. Detach the turn table from the tray. 4. Pull outward the tab marked d attaching the turn table motor assembly on the upper side of the tray and detach the turn table motor assembly from the tray. Fig.6
b
A
CW1 c b Sensor board
Turn table
Tray
B
Fig.7
d Turn table motor assembly
Fig.8
1-11
MX-G500
Removing the belt, the CD servo board and the switch board (See Fig.9 and 10)
Prior to performing the following procedure, remove the CD tray. 1. Detach the belt from the pulley on the upper side of the CD changer unit (Do not stain the belt with grease). 2. Disconnect the card wire from the pickup unit connector on the under side of the CD changer unit.
CD changer unit Belt
Attention : Solder is put up before the card wire is removed from the pick-up unit connector on the CD mechanism assembly. (When the card wire is removed without putting up solder, the CD pick-up unit assembly might destroy.) 3. Disconnect the motor wire harness from connector on the CD servo board. 4. Remove the screw C attaching the switch board and release the two tabs e attaching the switch board outward and detach the switch board. 5. Remove the two screws D attaching the CD servo board and . First release the two tabs f and two tabs g attaching the CD servo board motor to raise the CD servo board slightly, then release the CD servo board. If the tabs f and g are hard to release, it is recommendable to unsolder the two soldered parts on the motor terminal of the CD servo board.
Fig.9
D CD servo board
Tabs e Tabs g Soldered parts Motor Tabs f
C
Switch board CW3 CD mechanism board motor connecter Pickup unit connector
Card wire
Soldering
Picup unit connector
Fig.10
1-12
MX-G500
Removing the CD mechanism holder assembly (mechanism included) (See Fig.11 to 14)
1. Disconnect the harness from connector on the CD mechanism board in the CD mechanism assembly on the under side of the CD changer unit. Disconnect the card wire from the pickup unit connector. Attention : Solder is put up before the card wire is removed from the pick-up unit connector on the CD mechanism assembly. (Refer to Fig.10) (When the card wire is removed without putting up solder, the CD pick-up unit assembly might destroy.)
Motor connecter
CD changer unit CD mechanism holder assembly Pickup unit connector
2. Remove the screw E attaching the shaft on the right side of the CD mechanism holder assembly. Pull outward the stopper fixing the shaft on the left side and remove the CD mechanism holder assembly from behind in the direction of the arrow y. 3. Turn the CD mechanism holder assembly half around the lift up slide shaft h of the CD mechanism holder assembly until the turn table is reversed, and pull out the CD mechanism holder assembly.
Fig.11
E
Stopper CD mechanism holder assembly
Fig.12
Lift up slide shaft n Lift up slide shaft
y
CD mechanism holder assembly
CD mechanism holder assembly
Fig.14
Fig.13
1-13
MX-G500
·
Removing the CD mechanism holder from the CD chager unit. (Refer to "Removing the CD mechanism holder assembly" )
Shutter Pickup unit Shaft
A
Removing the pickup unit
(See Fig.1)
1. Removing the cut washer on the feed gear sleeve and pull out the feed gear. 2. Remove the two screws A fixing the pickup shaft. 3. Removing the pickup unit.
A B
Cut washer Feed Gear Fig.1
Removing the motor board
2. Remove the moter board.
(See Fig.2)
1. Unsolder the motor terminal on the motor board.
Removing the feed motor
(See Fig.1) Remove the two motor fixing screws at B and removing the feed motor.
Motor board
Unsolder Feed motor
Removing the spindle motor
The spindle motor cannot be removed as a single unit. When removing the spindle motor, change the chasis and turntable together as aunit.
Spindle motor
Unsolder Fig.2
1-14
MX-G500
Removing the record/playback mechanism.
R/P Head
Removing the R/P head.
1. Remove the screw A on the right side of the R/P head.(Fig.1, Fig.2) 2. Remove the screw B on the left side of the R/P head.(Fig.1, Fig.2)
Remove the erase head.
Remove the screw C fixing the erase head.(Fig.1) E. Head Stoppsr
C B
A
Removing the pinch roller.
1. Pull out the pinch roller by opening the pinch roller stopper outward to unlock .(Fig.3) 2. When reassembling the pinch roller, refer to fig. 4 to hook up the spring.
Pinch roller assembly
Fig.1
B
A
Spring
R/P Head Fig.2
Pinch roller
Pinch roller stopper
Fig.3
Return spring
Pinch roller
Pinch roller spring
Return spring Fig.4
Return spring
1-15
MX-G500
Mecha. board b E Motor terminal D E b
a
Removing the motor.
1. Remove the two screws D fixing the motor. Be careful to grease's splash when the drive belt comes off.(Fig.5, Fig.6) 2. Unsolder the motor terminal.(Fig.5)
Removing the mechanism board.
1. Unsolder the four parts a on the solenoid
coil terminal.(Fig.5) 2. Remove the two screws E fixing the board.(Fig.5) 3. Unhook the three parts b from the board.(Fig.5) 4. Remove the mechanism board.(Fig.5) Drive belt (Flat) Motor Fig.5 Motor D
a Drive belt
Removing the flywheel.
Remove the cut-washers at c and d from the capstan shaft, then remove the flywheel. When reassembling the flywheel, be sure to use new washers as they cannot be reused.(Fig.8, Fig.9)
Drive belt Fig.6
Capstan washer
Capstan washer
d c Sleeve Sleeve Washer FR belt
Fig.7
Flywheel FR belt Flywheel
1-16
Flywheel
Fig.9
Fig.8
MX-G500 < Speaker section >
It is exchange in a unit. Please do not decompose as much as possible.
A(long wood screw) A(short wood screw)
Boss and adhesion
Removing the side panel
(See Fig. 1)
A(long screw)
1. Remove the five screws A attaching the side panel and remove the side panel.
NOTES : It will be good to use the tool with a flat tip, since a boss's portion is pasted with adhesives. Please take care not to damage the cabinet at this time.
Boss and adhesion
Side panel
Fig.1
Side speaker
Front panel
Removing the side speaker (See Fig. 2 and 3)
Prior to performing the following procedure, remove the side panel.
B
1. Remove the four screws B attaching the side speaker. 2. Pull out the side speaker and remove the speaker cord from the speaker terminal.
Fig.2
Side speaker Speaker terminal
Fig.3
1-17
AH39-00022A
9
CW3 CW101 CW104
CW102 CW103
16634-502-610
AH39-20002D
Color codes are shown below. 1 Brown 2 Red 3 Orange 4 Yellow 5 Green 6 Blue 7 Violet 8 Gray 9 White 0 Black
AH39-00096D
3809-001034
1-18
3809-001184 3809-001228
UCW1
3809-001222
MX-G500
Tuner board Power /CD switch board
ACW2
JW1
3809-001224
ACW1 UCW7 FCW1
Amp. board
0 9
9 2 Front key switch board
3809-001315
RCW6 OCW
0 0
9
FCW3 JCW2
JCW1
Main board
AH39-00245A
Wiring connection
FCW3
FCW2
HCW3
FL dispaly & system control board AH39-00244A
RW2 UCW2 UCW3 PCW1 UCW4 UCW5 UCW6
0 9 0
9
2
RW1
0 9
0 Power transformer
RCW2
9
2
0
0
9
RFS5 RFS6 RFS7 RFS8
RFS2
HCW2
0 9 AH39-00247A Headphone J.board
3809-001185
3809-001121 AH39-20561P
0
9 0
9
0
0
9
CD mechanism
CW2 CW3 CW1 AAN1
8 8 2
2 0 9 0
2 9 0 2 8 8 9 0 9
0
0
0
9
CW107 CW105 CW106
CD servo board 0
9 0
AH39-20025S
2 0
2
9
2
MX-G500
Adjustment method
1. Tuner
* Adjustment Location of Tuner PCB
ITEAM
Received FREQ. Adjustment point
AM(MW) OSC Adjustment 530~1710 KHz MO 1~7.0 0.5V
AM(MW) RF Adjustment 603 KHz MA
Maximum Output(Fig.1)
Output
MAIN PCB
VT
GND
TESTER
Fig.1 OSC Voltage
1-19
MX-G500
FM THD Adjustment SSG FREQ. Adjustment point (FM DET) Output 98 MHz FM DETECTOR COIL 60 dB
Speaker Terminal output Distortion Meter
Input
Output GND FM S.S.G
FM Antenna SET Terminal Input Oscilloscope
Minumum Distortion (0.4% below) (Fig.2)
Fig.2 IF CENTER and THD Adjustment
FM Search Level Adjustment SSG FREQ. Adjustment point (SVR1) Output 98 MHz BEACON SENSITIVITY SEMI-VR(20K ) 28 dB( 2dB)
FM S.S.G 28 dB FM Antenna SET GND FM IN
Adjust SVR1 so that "TUNED" of FL T is lighted (Fig.3) *Adjust FM S.S.G level to 28dB
20 k
Fig.3 FM Auto Search Level Adjustment
AM(MW) I.F Adjustment SSG FREQ. Frequency Adjustment point Maximum output (Fig.4) 450 kHz 522 kHz
AM IF 60cm
AM IF
OUTPUT AM SSG 450KHZ
INPUT
AM ANT IN Speaker Terminal
OUTPUT
VTVM
Oscilloscope
Fig.4 AM I.F Adjustment
1-20
MX-G500
2. Cassette Deck
To adjust tape speed
Notes 1) Measuring tape: i) VT-712/MTT-111(or equivalent) (Tapes recorded with 3kHz) ii) AC-225/MTT-5512(or equivalent) 2) Connect the cassette deck to the frequency counter as in fig.1.
Cassette Deck
Frequency Counter
SPK OUT output Fig.1
Step 1
Item NOR SPEED Control
Pre-Setup Condition OUT (connected to the frequencycounter)
Pre-Setup 1) Deck 1:VT-712 2) Press PLAY SW button 3) Deck 2:Same as above
To Adjust Turn VSR1 to left and right (FRONT PCB)
Standard 3KHz
Remark
1%
range
To adjust plabyback level/REC
Notes 1) Before the actual adjustment, clean the play/recording head. 2) Measuring tape : i) VT-703 / MTT-114N(or equivalent 10kHz AZIMUTH control) ii) AC-225/MTT-5512(or equivalent) 3) The cassette deck is connections as shown in fig.2.
Cassette Deck
SPK OUT
VTVM
Oscilloscope
(GND)
In Out Fig.2
1. Adjust Deck 1 Play Level
Step 1 Item AZIMUTH Pre-Setup Condition SPK OUT (VTVM is connected to the scope) Pre-Setup After putting MTT-114N into Deck 1 - Press FWD PLAY button. To Adjust Standard Remark
Turn the control Max output After screw to as and same phase adjustment shownin Fig.3. (both channels) secure it with REGION LOCK.
1-21
MX-G500
2. Adjust Deck 2 Play Level/REC BIAS
Step Item Pre-Setup Condition SPK OUT (VTVM is connected to the scope) Pre-Setup
After putting VT-703 into Deck 2 1)Press FWD PLAY button.
To Adjust
Standard
Remark
1
AZIMUTH
Turn the control Max output screw to as and same phase shown in Fig.3. (both channels)
After adjustment secure it with REGION LOCK.
2
Recording Bias Voltage
Fig.4
After putting AC-225 into Deck 2 1)Press REC PLAY button. 2)MAIN PCB JCW3, connectted to VTVM
Turn JSR2L, JSR2R to the right and left
7mV(
0.5mV)
Recording /Play head
AZIMUTH control screw Fig.3
Audio OSC.
SET (MAIN PCB)
LINE OUT
VTVM
Oscilloscope
IN
TP JCW3
AUX IN
IN
OUT
Fig.4
1-22
MX-G500
Flow of functional operation until TOC read
Check Point
Power ON
Play Key
RESET a CD LSI
Confirm that the voltage at the pin17 of KB9226(IC101) is "L" "H".
LIMIT SW ON
Confirm that the voltage at the pin33 of KB9226(IC101) is "H" "L" "H".
SET Default value of TE gain, TE balance
Automatic adjusting of focus bias
Automatic adjusting of FE offset
Automatic adjusting of TE offset
LASER power ON
Confirm that the voltage at the pin37 of KB9226(IC101) is 3.5V.
Detection of disk
Tracking error waveform at TOC reading Pin 34 of KB9226 (IC101)
Approx 0.4V 2.50V
Approx.3.7sec
Disc is rotated
Confirm that the signal from pin24 of KB9226(IC101) is 3.5V as a accelerated pulse during approx.1.96s. Confirm the waveform of the Tracking error signal at the pin 34 of KB9226(IC101).
Automatic adjusting of TE balance
Disc states to rotate
Automatic adjusting of TE gain
TOC reading
Confirm the eye-pattern at the pin2 of KB9226(IC101).
Play a disc
1-23
MX-G500
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 : amplitude of eye pattern) will below.
Is the level of RF OUT under 1.1V 0.2Vp-p?
NO
Replace it.
YES O.K (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.
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)
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.
Play a disc.
Check the eye-pattern at TP1.
Finish. 1-24
MX-G500
Troubleshooting
1. Amplifier
Power malfunction
No output
1-25
MX-G500
2.Tuner malfunction (FM/AM)
3.Tape
HA12235F
16
HA12235F
3,4,27,28
JIC1(HA12235F) PIN5,26 JC63L,JC63R,JR65L,JR65R
1-26
MX-G500
4.CD
1-27
MX-G500
Description of major ICs
5L9290 (IC201) : Digital signal processor for CDP
VDDD_DAC VDDA_DAC VSSD_DAC VSSA_DAC VDDA_PLL
1. Pin layout
RCHOUT
LRHOUT
VHALF
SADTI
LRCKI
38
VREF
48 VSSA_PLL VCO1LF 1 2
47
46
45
44
43
42
41
40
39
37 36 BCKO 35 LRCKO 34 SADTO 33 DATX 32 C2PO
VSSD_PLL 3 VDDD_PLL 4 VDDD1_5V 5 XIN XOUT 6 7
S5L9290X
DSP+DAC
48-LQFP-0707
BCKI
31 JITB 30 SBCK 29 VDDD3-5V 28 VSSD2-3V 27 VDDD2-3V 26 MUTE 25 SQDT
VSSD1_5V 8 EFMI 9
LOCK 10 SMEF 11 SMON 12
13
14
15
16
17
18
19
20
21
22
23
24
WDCK
SMDS
RESETB
TESTV
2. Block diagram
SOS1 SQDT SBDT
SQCK SBCK
ISTAT
C2PO
SQCK
MDAT
LKFS
LKFS
S0S1
MLT
MCK
DATX
VCO1LF EFMI DPLL
Subcode Out
Digital Out
LOCK SMEF SMDP SMDS WDCK
EFM Demodulator
Interpolator
Digital Filter
CLV Servo
ECC
1-bit DAC
WFCK RFCK C4M XIN ISTAT MLT MDAT MCK MUTE
Timing Generator
16K SRAM PWM
Micom Interface
Address Generator
I/O Interface
LPF
JITB
SADTO LRCKO BCKO
SADTI LRCKI BCKI
LCHOUT VHALF RCHOUT VREF
1-28
MX-G500
3. Pin function 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 28 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Symbol VSSA_PLL VCO1LF VSSD_PLL VDDD_PLL VDDD1-5V XIN XOUT VSSD1 EFMI LOCK SMEF SMDP SMDS WDCK TESTV LKFS C4M RESETB MLT MDAT MCK ISTAT S0S1 SQCK SQDT MUTE VDDD2-3V VSSD2 VDDD3-5V SBCK JITB C2PO DATX SADTO LRCKO BCKO BCKI LRCKI SADTI VSSD_DAC VDDD_DAC RCHOUT VSSA_DAC VREF VHALF VDDA_DAC LCHOUT VDDA_PLL I/O O I O I O O O O O I O O I I I I O O I O I I O O O O O O I I I O O O O Function Analog Ground for DPLL Pump out for VCO1 Digital Ground Separated Bulk Bias for DPLL Digital Power Separated Bulk Bias for DPLL (3V Power) Digital Power (5V Power, I/O PAD) X'tal oscillator input (16.9344MHz) X'tal oscillator output Digital Ground (I/O PAD) EFM signal input CLV Servo locking status output LPF time constant control of the spindle servo error signal Phase control output for Spindle Motor drive Speed control output for Spindle Motor drive Word clock output (Normal Speed : 88.2KHz, Double Speed : 176.4KHz) Various Data/Clock Input The Lock status output of frame sync 4.2336MHz clock output System Reset at 'L' Latch signal input from Micom Serial data input from Micom Serial data receiving clock input from Micom The internal status output to Micom Subcode sync signal(S0+S1) output Subcode-Q data transfering bit clock input Subcode-Q data serial output System mute at 'H' Digital Power (3V Power, Internal Logic) Digital Ground (Internal Logic) Digital Power (5V Power, I/O PAD) Subcode data transfering bit clock Internal SRAM jitter margin status output C2 pointer output Digital audio data output Serial audio data output (48 slot, MSB first) Channel clock output Bit clock output Bit clock input Channel clock input Serial audio data input (48 slot, MSB first) Digital Ground for DAC Digital Power for DAC (3V Power) Right-Channel audio output through DAC Analog Ground for DAC Referance Voltage output for bypass Referance Voltage output for bypass Analog Power for DAC (3V Power) Left-Channel audio output through DAC Analog Power for PLL (3V Power)
1-29
MX-G500
KB9226 (IC101) : RF amp. & servo signal processor
1. Pin layout
36
ATSC
35
LPFT
34
TEIO
33
TZC/SSTOP
32
GND
31
FEO
30
FEM
29
TEO
28
TEM
27
SLP
26
SLO
25
SLM
37 LD 38 PD
SPO 24 SPM 23 ASY 22 EFM 21 LOCK 20 WDCK 19
39 PDAC 40 PDBD 41 PDF 42 PDE 43 DCB 44 MCP 45 DCCI 46 DCCO 47 VREF
FRSH
S1L9226X
CLVI 18 RESET 17 MLT 16 MDATA 15 MCK 14 ISTAT 13
48 EQC
EFMI EQO RFM RFO VCC EQI
FSET
FGD
1
2
3
4
5
6
7
8
9
10
11
12
2. Block diagram
PDBD PDAC VREF EQC RFM RFO PDE PDF
EQI
TGU
FLB
FSI
3
2
1
48
47
42
41
40
39
EQO EFMI
4 5
RF AGC & EQ Control Focus OK Detect Defect Detect Mirror Gen
Center Voltage
Tracking Error (RW) I/V AMP
RF & Focus Error (CD-RW) I/V AMP
38 PD 37 LD 35 LPFT 34 TEIO
DCCI 45 DCC0 46 MCP 44 DCB 43 VCC/ VDD FRSH FSET FLB
APC. Laser Control & LPC
Focus Servo Loop - Gain & Phase Compensation - Focus Search - Offset Adjust - FZC Gen.
6 7 8 9
Tracking Servo Loop - Gain & Phase Compensation - Track Jump - Offset Adjust - TZC Gen.
TZC& SSTOP 36 ATSC 33 29 TEO 28 TEM
FGD 10
Hardware Logic - Auto-Sequencer - Fast Search - Febias, Focus Servo, Tracking Offset ADJ. - Tracking Balance & Gain Adjust - Interruption Detect - EFM Muting System
Sled Servo & Kick Gen
27 SLP 26 SLO 25 SLM
29 FEO 30 FEM 23 SPDLO 24 SPDLM
FSI 11
TGU 12 Micom Data Interface Logic Decoder
EFM Comparator 18
CLVI
Spindle Servo LPF
13
ISTAT
14
MCK
15
MDATA
16
MLT
17
RESET
19
WDCK
20
LOCK
22
ASY
21
EFM
1-30
MX-G500
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 37 38 39 40 41 42 43 44 45 46 47 48 Symbol RFM RFO EQI EQO EFMI VCC FRSH FSET FLB FGD FSI TGU ISTAT MCK MDATA MLT RESET CLVI WDCK LOCK EFM ASY SPM SPO SLM SLO SLP TEM TEO FEM FEO GND TZC/ SSTOP TEIO LPFT ATSC LD PD PDAC PDBD PDF PDE DCB MCP DCCI DCCO VREF EQC I/O I O I O I P I I I I I I O I I I I I I I O I I O I O I I O I O P I B I I O I I I I I I I O I O I Function RF summing amp. inverting input RF summing amp. output RFO DC eliminating input(use by MIRROR, FOK ,AGC & EQ terminal) RF equalizer output EFM slice input. (input impedance 47K) Main power supply Capcitor connection to focus search Filter bias for focus,tracking,spindle Capacitor connection to make focus loop rising band Terminal to change the hign frequency gain of focus loop Focus servo input Connect the component to change the high frequency of tracking Loop Internal status output Micom clock Data input Data latch input Reset input Input the spindle control output from DSP 88.2KHz input terminal from DSP Sled run away inhibit pin (L: sled off & tracking gain up) EFM output for RFO slice(to DSP) Auto asymmetry control input Spindle amp. inverting input Spindle amp. output Sled servo inverting input Sled servo output Sled servo noninverting input Tracking servo amp.inverting input Tracking servo amp. output Focus servo amp. inverting input Focus servo amp. output pin Main ground Tracking zero crossing input & Check the position of pick-up wherther inside or not Tracking error output & Tracking servo input Tracking error integration input (to automatic control) Anti-shock input APC amp. output APC amp. input Photo diode A & C RF I/V amp. inverting input Photo diode B & D RF I/V amp. inverting input Photo diode F & tracking(F) I/V amp. inverting input Photo diode E & tracking(E) I/V amp. inverting input Capacitor connection to limit the defect detection Capacitor connection to mirror hold Output pin to connect the component for defect detect Input pin to connect the component for defect detect (VCC+GND)/2 Voltage reference output AGC_equalize level control terminal & capacitor terminal to input in to VCA 1-31
MX-G500 LC72131(IC02) : PLL frequency synthesizer for electron alignment
1. Pin layout 2. Block diagram
XIN CE DI CL DO BO1 BO2 BO3 BO4 I01
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
XOUT VSS AOUT AIN PD VDD FMIN AMIN I02 IFIN
1 20
Reference Driver
Phase Detector Charge Pump
16 17 18
14
1 2
Swallow Counter 1/16,1/17 4bits
Unlock Detector
13
12bits Programmable Divider
11
2 3 4 5 15 19
CCB I/F Power on Reset
Data Shift Register & Latch
Universal Counter
6
7
8
9
10
12
3.Pin function
Symbol Pin No. Type Functions
(1/2)
Circuit configuration
XIN XOUT
1 20
Xtal OSC
Crystal resonator connection (4.5MHz/7.2MHz)
FMIN
14
Local oscillator signal input
Serial data input : FMIN is selected when DVS is set to 1. The input frequency range is from 10 to 160MHz. The signal is passed through a built-in divide-by-two prescaler and then supplied to the swallow counter. A1 though the range of divisor setting is from 272 to 65, 535, the actual divisor is twice the setting since there is also a built-in divide-by-two prescaler.
AMIN
13
Local oscillator signal input
Serial data input : AMIN is selected when DVS is set to 0. Serial data input : When SNS is set to 1 : The input frequency range is form 2 to 40MHz The signal is supplied directly to the swallow counter. The range of divisor setting is from 272 to 65, 535 and the actual divisor will be the value set. Serial data input : When SNS is set to 0 : The input frequency ranges is from 0.5 to 10MHz. The signal is supplied directly to a 12-bit programmable divider. The range of divisor setting is from 4 to 4,095 and the actual divisor will be the value set. Most be set high when serial data is input to the LC72131M (DI ), or when serial data is output (DO).
S
CE
2
Chip enable
1-32
MX-G500
3.Pin function
Symbol Pin No. Type Functions Used as the synchronization clock when serial data is input to the LC72131 (DI ), or when serial data is output (DO). Inputs serial data sent from the controller to the LC72131M.
(2/2)
Circut confguration
S
CL
4
Clock
DI
3
Input data Output data
S
DO
5
Output serial data sent from the LC72131M to the controller. The content of the output data is determined by the serial data DOCO to DOC2. The LC72131M power supply (VDD=4.5 to 5/5V) The power on reset circuit operates when power is first applied. The LC72131M ground. Dedicated output pins The output states are determined by BO1 to BO4 in the serial data. 'Data"=0:Open =1:Low The pins go to the open state after the power-on reset. An 8Hz time base signal can be output from BO1 when TBC in the serial data is set to 1. Note that the ON impedance of the BO1 pin is higher than that of the other pins (BO2 to BO4) Pins used for both input and output The input or output state is determined by bits IOC1 and IOC2 in the serial state. 'Data"=0:Input port =1:Output port When specified for use as an input port : The input state is transmitted to the controller through the DO pin. 'Input state"=Low:data value 0 =High:data value 1 When specified for use as an output port : The output state is determined by bits IO1 and IO2 in the serial sate. 'Data"=0:Open =1:Low These pins go to the input port state after the power-on reset.
VDD VSS
15 19
Power supply Ground
BO1 BO2 BO3 BO4
6 7 8 9 Output port
IO1 IO2
10 I/O Port 12
S
PD
16
Charge pump output
PLL Charge pump output When the frequency generated by dividing the Local oscillator frequency by N is higher than the reference frequency, a high level will be output from the PD in. similarly, when that frequency is lower, a low level will be output. The PD pin goes to the high impedance state when the frequencies agree.
AIN AOUT
17 18
L.P.F amplifier Tr
The MOS transistor used for the PLL active Low-pass filter.
IFIN
11
IF counter
The input frequency range is from 0.4 to 12MHz. The signal is supplied directly to the IF counter. The result from the IF counter MBS is output through the DO pin. There are four measurement periods: 4, 8, 32 or 64ms.
1-33
1-34
4.7 k 2.2k 8.2k 2.2u 21 (6.8k+1.5k)
NC ALC(L) PB OUT(L) REC OUT(L) REC IN(L)
MX-G500
0.01 u 15k 0.1u 24 22 23
0.1u NC TAI(L)
4.7 k 10k 2.2u 26 25
EQOUT(L)
PB-EQ(L)
1. Block diagram
PB-NF2(L)
30 27
29
28
47u PB-NF1(L) 31 +
EQ
20 I ref TEST (Open for normal use)
+ MUTE
120/60 (Norm/High)
AIN(L) 32 19 22k GND 18 ALCDET 1M 17
Return SW A B
1u RIP 33
+
BIN(L) 34
HA12235 (JIC1) : Audio signal processor
REC Return 35 GND 36
Return SW
16
Vcc
10u
+
Vcc
ALC
15 REC MUTE OFF/ON
BIN(R) 37
14
MUTE ON/OFF
NC 38 AIN(R) 39
MUTE + A B
13
A A/B (REC RETURN ON/OFF) 12 High/Normal
PB-NF1(R)
47u 1 2
TAI(R)
+
3 4
40
120/60 (Norm/High)
EQ
5 6 7 8 9 10
11
ALC ON/OFF
+
2.2u 2
0.1u PB OUT(R)
NC
0.1u
NC
+
ALC(R) REC IN(R) REC OUT(R)
2.2u 10k 15k 2.2k 8.2k (6.8k+1.5k)
PB-EQ(R)
PB-NF2(R) EQOUT(R)
0.01 u
4.7 k
4.7 k
MX-G500
2. 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 37 38 39 40 Symbol PB-NF2(R) PB-EQ(R) EQOUT(R) TAI(R) PBOUT(R) NC RECIN(R) NC RECOUT(R) ALC ON/OFF High/Norm A/B MUTE ON/OFF REC MUTE OFF/ON Vcc GND IREF Test mode RECOUT(L) NC RECIN(L) NC PBOUT(L) TAI(L) EQOUT(L) PB-EQ(L) PB-NF2(L) PB-NF(L) AIN(L) RIP BIN(L) REC-RETURN GND BIN(R) NC AIN(R) PB-NF1(R) Function PB EQ feed back NAB output EQ output Tape input PB output NC pin REC-EQ input NC pin REC output Mode control input Mode control input Mode control input Mode control input Mode control input Vcc pin GND pin Equalizer reference current input Test mode pin REC output NC pin REC-EQ input NC pin PB output Tape input EQ output NAB output PB EQ feed back PB EQ feed back PB A deck input Ripple filter PB B deck input REC Return GND pin PB B deck input NC pin PB A deck input PB EQ feed back
1-35
MX-G500
M66010 (UIC2) : I/O control
1.Pin layout
D0 D1 CLK CS Vcc S GND D24 D23 D22 D21 D20 D19 D18 D17 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 DO DI CLK CS S D24 D23 D22 D21 D20 D19 D18 D17 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16
2.Block diagram
Shift register 1
Vcc 5
DO D3 D2 D1
1 32 31 30
DO D1 D2 D3
SET INPUT CHIP SELECT INPUT
S CS
6 4
Control circuit
CLOCK INPUT
CLK
3
D24 D23 D22
SERIAL DATA OUTPUT
Q24 Q23 Q22 D24 D23 D22 Q24 Q23 Q22 DI
Q3 Q2 Q1 D3 D2 D1 Q3 Q2 Q1
Parallel output latch 10 D22 9 8 7 16 D23 D24
PARALLEL DATA I/O
Shift register 2 SERIAL DATA DI INPUT 2
GND GND
STK402-040 (AIC1) / STK402-090 (AIC2) : Power amp.
1.Pin layout
STK402-090
1
15 STK402-090
+ _ ch.1 + ch.2 _
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
CH1 CH1 IN NF
NC
Pre BIAS Vcc
CH1 CH1 VE -VE
Vcc -Vcc CH2 CH2 Pre SUB CH2 +VE -VE -Vco GND NF
CH2 IN
1-36
MX-G500
TDA7442D (FIC1) : Audio processor
1.Pin layout
R_IN3 R_IN2 R_IN1 L_IN1 L_IN2 L_IN3 L_IN4 MUXOUTL IN(L) MUXOUT(R) IN(R) BIN(R) BOUT(R) BIN(L) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 R_IN4 LOUT ROUT AGND VS CREF SDA SCL DIG-GND TREBLE(R) TREBLE(L) PS1 LP BOUT(L)
2.Block diagram
100nF 2.2 F
IN(L)
5.6nF
5.6K 100nF
100nF
MUXOUT(L) 0.47 F L-IN1 50K 0.47 F L-IN2 50K 0.47 F L-IN3 0.47 F L-IN4 50K 6 50K 7 + + 5 4 31.5dB control 8
PS1 17 RPS1
TREBLE-L 18 14
BIN(L) BOUT(L) 15 RB
9
FIX
30K PS1 90Hz OFF 79dB CONTROL VAR SPKR ATT MUTE + FIX MIXING AMP TREBLE BASS 21 22 I2C BUS DECODER + LATCHES 20 TREBLE BASS FIX SURR VAR + 50K 30K OFF MUTE 79dB CONTROL 50K 31.5dB control 10 MUXOUT(R) 11
IN(R)
SYMULATED L+R MUSIC + L-R OFF
MUSIC/ SYMULATED
SURR
27
LOUT
SCL SDA DIG GND
0.47 F R-IN1
3 50K
0.47 F R-IN2
2 50K
LPF 9KHz
EFFECT CONTROL
MIXING AMP
0.47 F R-IN3 0.47 F R-IN4
SPKR ATT
1
26
ROUT
28 Vref RB 19 CREF TREBLE-R 12 BIN(R) 13 BOUT(R)
SUPPLY
16 LP
24 VS 1.2nF
25
AGND
23
D98AU947A
2.2 F
22 F 5.6nF 100nF 5.6K 100nF
BA4560 (AIC3, AIC4, AIC5, AIC6, AIC7, FIC4, HIC1) : Dual op amp.
1.Pin layout
OUT1 1 8 VCC
IN1 2 + IN1 3
1ch
7
OUT2
+
2ch
+
6
IN2
VEE 4
5
+ IN2
1-37
MX-G500
L4959 (RIC1) : Voltage regulator
1.Pin layout
11 10 9 8 7 6 5 4 3 2 1 OUT 12V(a) VS OUT 8.6V EN 8.6V EN 12V(a) GND EN 12V(b) N.C. OUT 5.6V VS OUT 12V(b)
TAB CONNECTED TO PIN 6
D97AU716A
2.Block diagram
VS 2/10 5.6V, 250mA REGULATOR 8.6V, 600mA REGULATOR SWITCHED EN 8V 8 12V, 800mA REGULATOR SWITCHED EN 12V(a) 7 12V, 1.3A REGULATOR SWITCHED EN 12V(b) 5 1 11 3
OUT 5.6V
REF GEN
9
OUT 8.6V
OUT 12V(a)
OUT 12V(b)
6
D97AU569C
GND
3.Pin function
Pin 1 2 3 4 5 6 7 8 9 10 11 Pins OUT 12V (b) VS OUT 5.6V N.C. EN 12V (b) GND EN 12V (a) EN 8.6V OUT 8.6 VS OUT 12V (a) Description 12V/1.3A SWITCHED OUTPUT VOLTAGE Supply Voltage 5.6V/250mA OUTPUT VOLTAGE not connected Enable 12V/1.3A SWITCHED OUTPUT VOLTAGE Ground Enable 12V/0.8A SWITCHED OUTPUT VOLTAGE Enable 8.6V/0.6A SWITCHED OUTPUT VOLTAGE 8.6V/0.6A SWITCHED OUTPUT VOLTAGE Supply Voltage 12V/0.8A SWITCHED OUTPUT VOLTAGE
1-38
MX-G500
KA9258D (IC301) : 4-ch Motor driver
1.Block diagram
28
27
26
25
10K
24
23
22
GND
21
20
19
10K
18
17
16
15
VCC
VCC 10K
10K
REGULATOR T·S·D
50K MUTE
+ LEVEL SHIFT
+ LEVEL SHIFT
10K
10K
1
2
3
10K
4
5
6
7
10K
GND
8
9
10
11
12
13
14
LA1837 (IC01) : FM IF/DET AM RF/IF/DET
1.Block diagram
1-39
MX-G500
LC86P6548 (UIC1) : Microcontroller
S47/PF7 S46/PF6 S45/PF5 S44/PF4 S43/PF3 S42/PF2 S41/PF1 S40/PF0 VDD4 S39/PE7 S38/PE6 S37/PE5 S36/PE4 S35/PE3 S34/PE2 S33/PE1 S32/PE0 S31/PD7 S30/PD6 S29/PD5 S28/PD4 S27/PD3 S26/PD2 S25/PD1 S24/PD0 S23/PC7 S22/PC6 S21/PC5 S20/PC4 VP
81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
1.Pin layout
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51
2.Block diagram
Interrupt Control IR PLA
A15-A0 D7-D0 TA CE OE DASEC
Standby Control
Clock Generator
CF RC X' tal
BaseTimer
SIO0
SIO1
Timer 0
Timer 1
ADC
INT0-3 Noise Filt er SIO Automatic transmission
RAM 128 bytes
VFD Controller Watchdog Timer High voltage Output
1-40
P16/BUZ P17/PWM0 P30 P31 P32 P33 P34 P35 P36 P37 P70/INT0 RES XT1/P74 XT2/P75 VSS1 CF1 CF2 VDD1 P80/AN0 P81/AN1 P82/AN2 P83/AN3 P84/AN4 P85/AN5 P86/AN6 P87/AN7 P71/INT1 P72/INT2/T0I P72/INT3/T0I S0/T0
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
S48/PG0 S49/PG1 S50/PG2 S51/PG3 P00 P01 P02 P03 VSS2 VDD2 P04 P05 P06 P07 P10/SO0 P11/SI0/SB0 P12/SCK0 P13/SO1 P14/SI1/SB1 P15/SCK1
50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
S19/PC3 S18/PC2 S17/PC1 S16/PC0 VDD3 S15/T15 S14/T14 S13/T13 S12/T12 S11/T11 S10/T10 S9/T9 S8/T8 S7/T7 S6/T6 S5/T5 S4/T4 S3/T3 S2/T2 S1/T1
PROM Control
PROM(48KB)
PC
Bus Interface
ACC
Port 1
B Register
Port 3
C Register
Port 7 ALU Port 8
PSW
RAR
RAM
Stack Poi nter
Port 0
MX-G500 KA3082 (IC401, IC402) : DC motor driver
1.Pin layout
DRIVER OUT
PRE DRIVER
BIAS
LOGIC SWITCH
TSD
1
2
3
4
5
6
7
8
9
10
GND
VO1
VZ1
VCTL
VIN1
VIN2
SVCC
PVCC
VZ2
VO2
2.Pin function
Pin No. 1 2 3 4 5 6 7 8 9 10 Symbol GND VO1 VZ1 VCTL VIN1 VIN2 SVCC PVCC VZ2 VO2 I/O O I I I O Function Ground Output 1 Phase compensation Motor speed control Input 1 Input 2 Supply voltage (Signal) Supply voltage (Power) Phase compensation Output 2
74HCU04 (OIC1) : Optical
1.Pin layout
1A 1 1Y 2 2A 3 2Y 4 3A 5 3Y 6 GND 7 14 Vcc 13 6A 12 6Y
04U
11 5A 10 5Y 9 4A 8 4Y
1-41
MX-G500
VICTOR COMPANY OF JAPAN, LIMITED AUDIO & COMMUNICATION BUSINESS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.21068)
200202(V)