JVC XL-R5020BK Service Manual
XL-R5020BK
SERVICE MANUAL
CD/CDR MULTIPLE COMPACT DISC RECORDER
XL-R5020BK
Area Suffix
J ------------- U.S.A.
CD1 CD2 CD3
1
2
5
4
8
7
10
10
PLAY
MODE
REPEAT CD CDR
Y
A
L
P
S
I
D
GROUP
SET
R
E
GROUP
C
S
O
U
R
C
E
CD REC CD EDIT SYNCHRO FADE
REC
PITCH 0
FINALIZE
REC MUTING
RM-SXL001J
REMOTE CONTROL
STANDBY/ON
3
6
9
GROUP
CONTROL
M
E
N
U
L
E
C
N
A
C
MIN MAX
PITCH
XLÐR5020 CD/CDR MULTIPLE COMPACT DISC RECORDER
COMPACT
DIGITAL AUDIO
MP3 PLAYBACK
COMPACT
DIGITAL AUDIO
Recordable
ReWritable
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
No.A0035
Aug. 2002
XL-R5020BK
TABLE OF CONTENTS
1 Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Warning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 Critical parts for safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.5 Preventing static electricity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.6 Handling the traverse unit (optical pickup) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.7 Importance admistering point on the safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.8 Precautions for Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Main body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Changer mechanism assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Confirm method of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.1 Check mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.2 All release of set content. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.3 Service menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.4 Running operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.5 Display of version number. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.6 Extension cord for diagnosis of changer mechanism unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5 Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1 AN22000A-W(IC601):RF & SERVO AMP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.2 BU4066BCF-X(IC831,IC841,IC861):Source selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.3 BU4052BCF-X(IC821):Channel switch controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.4 LB1641 (IC851,IC852) : DC Motor driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.5 TC74HC00AF(IC301,IC311):Digital I/O selector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.6 BR24C01AFV-W-X (IC201) : EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.7 LA6541-X (IC801) : Focus & Spindle & Feed & Tracking BTL driver . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.8 M66004SP(IC721):FL Driver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.9 MN35505-X (IC361) : DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.10 TC9246F-X(IC404):Clock generation for digital audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.11 TC74HCU04AF-W(IC331):Digital input selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.12 74VHC00MTC-X (IC406) : 2-input nand gate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.13 74VHC08SJ-X(IC407):2-input AND gate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.14 TC94A02F-005(IC401) : MP3 Decoder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.15 TC9412AF(IC891) : Rec Level. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.16 MN662790RSC(IC651):Digital servo & processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.17 UPD780076GK-533(IC251):Unit microcomputer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.18 UPD784215AGF513(IC501):System controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.19 W24L010AJ-12-X (IC402) : SRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
2
SECTION 1
Important Safety Precautions
1.1 Safety Precautions
(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 vo id
the manufacturers 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 specia l
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 reassembling.
(5) Leakage shock hazard testing)
After reassembling 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 direct ly into the AC outle t. Use a n AC
voltmeter having, 1,000 ohms per volt or more sensitivity in
the following manner. Connect a 1,500 ohm 10W resistor
paralleled by a 0.15 µF AC-type capacitor between an
exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
XL-R5020BK
voltmeter.
Move the resistor connection to each exposed metal part,
particularly any exposed metal part having a return path to
the chassis, and measure the AC voltage across the
resistor. Now, reverse the plug in the AC outlet and repeat
each measurement. Voltage measured any must not
exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC
(r.m.s.).
1.2 Warning
(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 lo-
cal voltage.
1.3 Caution
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.
1.4 Critical parts for safety
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 " " ma rk nearby are critical for safety.
When replacing them, be sure to use the parts of the same type
and rating as specified by the manufacturer. (Except the JC version)
3
XL-R5020BK
1.5 Preventing 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.
1.5.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser dio de) in devices such as DVD players.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron pl ate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(3) Handling the optical pickup
• 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.)
• 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.
1.6 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)I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
4
1.7 Importance admistering point on the safety
XL-R5020BK
5
XL-R5020BK
1.8 Precautions for Service
1.8.1 Handling of Traverse Unit and Laser Pickup
(1) Do not touch any peripheral element of the pickup or the actuator.
(2) The traverse unit and the pickup are precision devices and therefore must not be subjected to strong shock.
(3) Do not use a tester to examine the laser diode. (The diode can easily be destroyed by the internal power supply of the tester.)
(4) To replace the traverse unit, pull out the metal short pin for protection from charging.
(5) When replacing the pickup, after mounting a new pickup, remove the solder on the short land which is provided at the center
of the flexible wire to open the circuit.
(6) Half-fixed resistors for laser power adjustment are adjusted in pairs at shipment to match the characteristics of the optical block.
Do not change the setting of these half-fixed resistors for laser power adjustment.
1.8.2 Destruction of Traverse Unit and Laser Pickup by Static Electricity
Laser diodes are easily destroyed by static electricity charged on clothing
or the human body. Before repairing peripheral elements of the traverse unit or pickup, be sure to take the following electrostatic
protection:
(1) Wear an antistatic wrist wrap.
(2) With a conductive sheet or a steel plate on the workbench on wh ich the trave rse unit or the pick up is to be repaired, grou nd
the sheet or the plate.
(3) After removing the flexible wire from the connector (CN101), short-circuit the flexible wire by the metal clip.
(4) Short-circuit the laser diode by soldering the land which is provided at the center of the flexible wire for the pickup.
After completing the repair, remove the solder to open the circuit.
Please refer to "Fig.2-4" of "Disassembly
method" for details.
6
SECTION 2
Disassembly method
2.1 Main body
2.1.1 Removing the top cover (see Fig.1)
(1) Remove the four screws A attaching the top cover on both
sides of the body.
(2) Remove the two screws B attaching the top cover on the
back of the body.
(3) Remove the top cover from the body by lifting the rear part
of the top cover.
ATTENTION:
Do not break the front panel tab fitted to the top cover.
2.1.2 Removing the changer mechanism assembly
(see Fig.2~3)
*Prior to performing the following procedure, remove the top
cover.
(1) Remove the four screws C attaching the changer mecha-
nism assembly.
(2) Disconnect the card wire from connector CN606 and
CN651 on the CD servo control board respectively.
(3) Remove the changer mechanism assembly from the body
by lifting the rear part of the changer mechanism asse mbly.
XL-R5020BK
Fig.1
Fig.2
Fig.3
7
XL-R5020BK
2.1.3 Removing the CD recording mechanism assembly
(see Fig.4~6)
*Prior to performing the following procedure, remove the top
cover.
*There is no need to remove the changer mechanism assembly.
(1) Remove the two screws E attaching the mechanism chas-
sis.
(2) Remove the three screws F attaching the CD recording
mechanism assembly.
(3) Disconnect the card wire from connector CN702 and
CN703 on the servo control board respectively.
(4) Disconnect the connect wire from connector CN701 on the
servo control board.
(5) Remove the five screws G attaching the mechanism chas-
sis
Fig.5
Fig.4
2.1.4 Removing the MP3 board
(see Fig.7,8)
*Prior to performing the following procedure, remove the top
cover, CD recording mechanism assembly.
*There is no need to remove the changer mechanism assembly.
(1) Pull out the MP3 board from the fastener.
At this time, disconnect the connector CN401 of the MP3
board from connector CN616 on the Main board.
(2) Disconnect the card wire from connector CN617 on the
MP3 board.
Fig.6
Fig.8
Fig.7
8
2.1.5 Removing the front panel assembly
(see Fig.9~11)
*Prior to performing the following procedure, remove the top
cover.
*There is no need to remove the changer mechanism assembly
and CD recording mechanism assembly.
(1) Remove the three screws H attaching the front panel as-
sembly on the bottom of the body.
(2) Remove the two screws I attaching the headphone jack
bracket.
(3) Remove the one screw J attaching the mic jack bracket.
(4) Remove the one screw K attaching the main board.
(5) Disconnect the card wire from connector CN711, CN841
and CN501 on the main board respectively.
(6) Disconnect the flat wire from connector CN601 on the
main board from mic board.
(7) Hook a and b are removed respectively, and the front
panel assembly is removed.
XL-R5020BK
Fig.9
Fig.10
Fig.11
9
XL-R5020BK
2.1.6 Removing the rear panel
(see Fig.12,13)
*Prior to performing the following procedure, remove the top
cover.
(1) Remove the ten screws L attaching the rear panel.
(2) Disconnect the power cord from connector CN1 on the
power supply board.
Fig.12
2.1.7 Removing the main board and power supply board
(see Fig.14)
*Prior to performing the following procedure, remove the top
cover, front panel assembly, changer mechanism assembly, CD
recording mechanism assembly and rear panel.
(1) Remove the four screws M attaching the power transform-
er.
(2) Disconnect the flat wire from connector CN901 and
CN902 on the main board.
(3) Remove the six screws N attaching the main board.
Fig.13
Fig.14
10
SECTION 3
MECHANISM
3.1 Changer mechanism assembly
3.1.1 Removing the servo control board
(See Fig.1 to 5)
ATTENTION:
Make sure the sub chassis unit is locating at the lowest position. If not,perform the following procedure from 1 to 3.
(1) Insert a screwdriver into the sub chassis slot on the back
of the body and push the slider (R) toward the front.
(2) From the top of the body, slide the hook and the slider (R)
forward until they stop.
(3) From the right side of the body, slide the slide cam (L)
backward until it stops. The sub chassis unit will move to
the lowest position.
(4) From the bottom of the body, unsolder each soldered part
a and b of the motors on the servo control board.
(5) Remove the five screws A attaching the servo control
board.
(6) Disconnect connector CN610 on the servo control board
from the tray select switch board to suspend the servo
control board tentatively. Solder the part c of the flexible
wire connected to connector CN601 on the underside of
the servo control board.
(7) Disconnect the flexible wire from connect or CN601 and
remove the servo control board from the body.
ATTENTION:
In case of disconnecting the flexible wire without soldering, the CD pick up may be damaged.
ATTENTION:
When reassembling, make sure the cam switch boss of
the servo control board is fitted to the slot p of the control cam on the bottom of the body
(Refer to Fig.3).
XL-R5020BK
Fig.3
Fig.4
Fig.1
Fig.2
Fig.5
11
XL-R5020BK
3.1.2 Removing the tray unit
(See Fig.6 to 9)
*The tray unit can be removed despite the position of the sub
chassis unit, but the lowest position is recommended to expedite
the work.
(1) Remove the four screws B attaching the top cover on the
top of the body.
(2) Remove the top cover with the two rods attached to the top
cover and the clamper base unit.
(3) Pull the lock lever of the return spring on the right si de of
the body to eject the tray unit.
(4) From the top of the body, release the tray from the joi nt
hook marked d (Push the tray toward the front).
(5) Release the stoppers on both sides in the direction of the
arrow and pull out the tray unit from the body.
ATTENTION:
Pull out the tray unit from the top tray 3 in sequence.
Fig.8
Fig.6
Fig.7
Fig.9
12
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