JVC CEXV-N450BUC, XV-N452SUC, XV-N452SUM Service Manual
SERVICE MANUAL
YD11820075SERVICE MANUAL
XV-N450BUC, XV-N452SUC,
DVD PLAYER
XV-N452SUM
Area Suffix
UC -------------- Canada
UM ------ Latin America
DISPLAY
COPYRIGHT © 2007 Victor Company of Japan, Limited
XV-N450BUC,XV-N452SUC,XV-N452SUM [D7P2]
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
COPYRIGHT © 2007 Victor Company of Japan, Limited
No.YD118
2007/6
SPECIFICATION
XV-N450BUC, XV-N452SUC, XV-N452SUM
General
Power requirements AC120 V, 60 Hz
Power consumption 8 W
Dimensions (Approx.) 430 × 35 × 201 mm (17 × 1.4 × 7.9 inches) (W × H × D) without foot
Net weight (Approx.) 1.6 kg (3.5 lbs)
Operating temperature 5 °C to 35 °C (41 °F to 95 °F)
Operating humidity 5 % to 90 %
Outputs
VIDEO OUT 1.0 V (p-p), 75 Ω, sync negative, RCA jack × 1
S-VIDEO OUT (Y) 1.0 V (p-p), 75 Ω,negative sync, Mini DIN 4-pin × 1
(C) 0.3 V (p-p),75 Ω
COMPONENT VIDEO OUT (Y) 1.0 V (p-p), 75 Ω,negative sync, RCA jack × 1,
(Pb)/(Pr) 0.7 V (p-p),75 Ω, RCA jack x 2
AUDIO OUT 2.0 Vrms (1 KHz, 0 dB), 600 Ω, RCA jack (L, R) × 1
DIGITAL OUT (COAXIAL) 0.5 V (p-p), 75 Ω, RCA jack × 1
System
Laser
Signal system
Frequency response DVD (PCM 96 kHz): 8 Hz to 44 kHz
Signal-to-noise ratio More than 90 dB (ANALOG OUT connectors only)
Harmonic distortion Less than 0.02%
Dynamic range More than 95 dB (DVD/CD)
Accessories
Video cable (1), Audio cable (1), Remote control (1), Batteries (2)
Note:
Design and specifications are subject to change without prior notice.
Semiconductor laser, wavelength 650 nm
NTSC
DVD (PCM 48 kHz): 8 Hz to 22 kHz
CD: 8 Hz to 20 kHz
1-2 (No.YD118)
SECTION 1
PRECAUTION
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 void
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 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 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 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 ohm 10W
resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth
ground.
Measure the AC voltage across the resistor with the AC
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.).
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
0.15 F AC TYPE
Place this
probe on
1500 10W
Good earth ground
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 local
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 " " mark 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)
each exposed
metal part.
(No.YD118)1-3
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 diode) 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 plate 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.
(caption)
Anti-static wrist strap
1M
Conductive material
(conductive sheet) or iron palate
(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.
1.7 Precautions of the safe use of battery
• Store the battery in a place where children cannot reach.If a child accidentally swallows the battery, consult a doctorimmediately.
• Do not recharge, short, disassemble or heat the battery or dispose of it in a fire.
Doing any of these things may cause the battery to give off heat, crack, or start a fire.
• Do not leave the battery with other metallic materials.Doing this may cause the battery to give off heat, crack, or start a fire.
• When throwing away or saving the battery, wrap it in tape and insulate; otherwise, the battery may start to give off heat, crack, or
start a fire.
• Do not poke the battery with tweezers or similar tools.Doing this may cause the battery to give off heat, crack, or start a fire.
• Dispose of batteries in the proper manner, according to federal, state, and local regulations.
1-4 (No.YD118)
1.8 Important for laser products
!
1.CLASS 1 LASER PRODUCT
2.CAUTION : VISIBLE AND/OR INVISIBLE CLASS 1M
LASER RADIATION WHEN OPEN.
DO NOT STARE INTO BEAM OR VIEW DIRECTLY WITH
OPTICAL INSTRUMENTS.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.
4.CAUTION : The laser products uses visible and / or
invisible laser radiation and is equipped with safety
switches which prevent emission of radiation when the
drawer is open and the safety interlocks have failed or are
defeated. It is dangerous to defeat the safety switches.
CAUTION : VISIBLE AND/OR INVISIBLE CLASS 1M
LASER RADIATION WHEN OPEN.
DO NOT STARE INTO BEAM OR VIEW
DIRECTLY WITH OPTICAL INSTRUMENTS.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified here in may result in
hazardous radiation exposure.
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
(No.YD118)1-5
SPECIFIC SERVICE INSTRUCTIONS
2.1 SERVICE INFORMATION FOR EEPROM
POWER ON
SECTION 2
DVD LOGO Status (NO Disk status)
Remotecontrol
Pause key-->1-->4-->7-->2 in order.
Press number 0~8, Press charater
A~F (1~6 for a while)
Use arrow key (F D G E) to move
to approprite position and make
changes
Press pause key once
DETECT NEW EEPROM
(OPTION EDIT SCREEN)
MODEL : XV-N450B/XV-N452S
NAME HEX
OPT 1 00
OPT 2 00
OPT 3 00
OPT 4 00
OPT 5 00
OPT 6 00
OPT 7 00
OPT 8 00
Change will be applied when power
OFF-->ON.
1-6 (No.YD118)
SECTION 3
TOP COVER
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the top cover (See figure 1)
(1) Remove the two screws A attaching the top cover on both
sides of the main body.
(2) Remove the three screws B attaching the top cover on the
back of the main body.
(3) Raise the both sides and lower part of the rear of the top
cover, with opening them slightly in an outward direction.
And the top cover will be removed.
TOP COVER
TOP COVER
3.1.3 Removing the mechanism assembly (See figure 4)
• Prior to performing the following procedure, remove the top
cover and front panel assembly.
(1) Disconnect the card wire from connectors P2201
on the main board.
P2202
(2) Remove the four screws C attaching the mechanism as-
sembly.
Mechanism assembly
B
C
C
Main board
and
P2201
A x 2
B
Fig.1
3.1.2 Removing the front panel assembly (See figure 2, figure 3)
• Prior to performing the following procedure, remove the top
cover.
(1) Disconnect the card wire from connector P6901
main board.
(2) Remove the eight hooks a, and then remove the front panel
assembly.
Main board
Hook a
Front panel assembly
Hook a
Fig.2
Hook a
P6901
B
on the
Hook a
Hook a
C
P2202
C
Fig.4
3.1.4 Removing the regulator board and main board (See
figure 5)
• Prior to performing the following procedure, remove the top
cover.
(1) Disconnect the wire from connector PW6101
board.
(2) Disconnect the power cord from connector PW101 on the
regulator board.
(3) Remove the four screws D attaching the regulator board.
(4) Disconnect the card wire from connectors P2201
and P6901
(5) Remove the two screws E attaching the main board.
(6) Remove the two screws F attaching the main board with
rear panel.
on the main board.
D
D
PW6101
E
P6901
on the main
, P2202,
P2202
E
Front panel
assembly
Hook a
Fig.3
D
PW101
Regulator board
D
Fig.5
Main board
F
F
P2201
(No.YD118)1-7
3.2 DVD MECHANISM PARTS LOCATION
• TOP VIEW (WITH TRAY)
• TOP VIEW (WITHOUT TRAY)
Procedure
Starting No.
Parts Fixing Type
Disass
embly
Fig-
ure
1 Main Base 4-1
12
Clamp Assembly Disc
4-1
1, 2 3 Plate Clamp 4-1
1, 2, 3 4 Magnet Clamp 4-1
1, 2, 3, 4 5 Clamp Upper 4-1
16Tray Disc 4-2
1, 6 7
Base Assembly
Sled
4-3
4 Screws,
1, 2, 6 8 Gear Feed
1 Connector
4-3
1 Locking Tabs
1, 2, 6, 8 9 Gear Middle
1, 2, 6, 8,9 10 Gear Rack 1 Screw 4-3
1, 2, 7 11 Rubber Rear 4-3
1, 2, 7 12
Frame Assembly Up/Down
1 Screw Bottom 4-4
1, 2 13 Belt Loading 1 Locking Tab 4-4
1, 2 ,13 14 Gear Pulley 4-4
1, 2, 13, 14 15 Gear Loading 1 Locking Tab 4-4
1, 2, 7, 12,
13, 14
1, 2, 13 17
1,2,7,12,13,
14,15,16,17
16 Guide Up/Down 4-4
PWB Assembly
Loading
1 Locking Tab
1 Hook
2 Screw
Bottom 4-4
18 Base Main 2 Locking Tabs 4-4
• BOTTOM VIEW
Note
When reassembling, perform the procedure in reverse order.
The “Bottom” on Disassembly column of above Table indicates
the part should be disassembled at the Bottom side.
1-8 (No.YD118)
3.3 DVD MECHANISM DISASSEMBLY
Fig.4-1
3.3.1 MAIN BASE (FIG. 4-1)
3.3.1.1 Clamp Assembly Disc
(1) Place the Clamp Assembly Disc as Fig. (A)
(2) Lift up the Clamp Assembly Disc in direction of arrow(A).
(3) Separate the Clamp Assembly Disc from the Holder
Clamp.
3.3.1.1.1 Plate Clamp
(1) Turn the Plate Clamp to counterclockwise direction and
then lift up the Plate Clamp.
3.3.1.1.2 Magnet Clamp
3.3.1.1.3 Clamp Upper
Fig.4-2
3.3.2 TRAY DISC (FIG. 4-2)
(1) Insert and push a Driver in the emergency eject hole(A) at
the right side, or put the Driver on the Lever(B) of the Gear
Emergency and pull the Lever(B) in direction of arrow so
that the Tray Disc is ejected about 15~20mm.
(2) Pull the Tray Disc until it is separated from the Base Main
completely.
(No.YD118)1-9
3.3.3 BASE ASSEMBLY SLED (FIG. 4-3)
(1) Release 4 Screw (S2).
(2) Disconnect the FFC Connector (C1)
3.3.3.1 Gear Feed
3.3.3.2 Gear Middle
1-10 (No.YD118)
Fig.4-3
3.3.3.3 Gear Rack
(1) Release the Scerw (S3)
3.3.4 RUBBER REAR (FIG. 4-3)
3.3.5 FRAME ASSEMBLY UP/DOWN (FIG. 4-4)
Note
Put the Base Main face down (Bottom Side)
(1) Release the screw (S4)
(2) Unlock the Locking Tab (L3) in direction of arrow and then
lift up the Frame Assembly Up/Down to separate it from the
Base Main.
Note
• When reassembling move the Guide Up/Down in direction of
arrow(C) until it is positioned as Fig.(C).
• When reassembling insert (A) portion of the Frame Assembly Up/Down in the (B) portion of the Guide Up/Down as
Fig.(B)
3.3.6 BELT LOADING(FIG. 4-4)
Note
Put the Base Main on original position(Top Side)
3.3.7 GEAR PULLEY (FIG. 4-4)
(1) Unlock the Locking Tab(L4) in direction of arrow(B) and
then separate the Gear Pulley from the Base Main
Fig.4-4
3.3.8 GEAR LOADING (FIG. 4-4)
3.3.9 GUIDE UP/DOWN (FIG. 4-4)
(1) Move the Guide Up/Down in direction of arrow(A) as
Fig.(A)
(2) Push the Locking Tab(L5) down and then lift up the Guide
Up/Down to separate it from the Base Main.
Note
When reassembling place the Guide Up/Down as Fig.(C) and
move it in direction arrow(B) until it is locked by the Locking
Tab(L5). And confirm the Guide Up/Down as Fig.(A)
3.3.10 PWB ASSEMBLY LOADING (FIG. 4-4)
Note
Put the Base Main face down(Bottom Side)
(1) Release 1 Screws(S5)
(2) Unlock the Loading Motor (C2) from the Hook (H1) on the
Base Main.
(3) Unlock 2 Locking Tabs(L6) and separate the PWB Assem-
bly Loading from the Base Main.
3.3.11 BASE MAIN (FIG. 4-4)
(No.YD118)1-11
SECTION 4
ADJUSTMENT
4.1 The version of the firmware is confirmed
(1) The power supply is turned ON.
(2) Press the "SETUP" button of the remote control unit to select "16:9" in "Display Mode".
TV Aspect
Display Mode
TV Output Select
4:3
16:9
Prev. Move Enter
(3) Press the buttons of the remote control unit in the following order.
"1"→"3"→"9"→"7"→"1"→"3"→"9"→"ENTER"
(4) When the TV display changes as shown as below, check the firmware version.
SYSTEM INFORMATION
MODEL : JVC_DV_JV070D202230BZIH
CHIP I.D : VADDIS_888
Firmware version
of main body
SERVO VER. : 40.52
MICOM VER. : V1.372
Check Sum : B6B3
PROM OPTION 55 53 00 d3 03 55 f4 00
Factory Reset..Done.
(5) Press the "ENTER" button of the remote control unit to display the initial screen.
4.2 Updating the firmware
• Firmware update disc supports CD-R media.
• When firmware update is necessary, information is available from the web site of DIGITAL VIDEO STORAGE, CS group.
4.2.1 Creating an update disc
Please check the details of the update disc creation method with JS-NET.
(1) Down load the update file from JS-NET.
(2) Write the update file into CD-R. Pay attention in the following points when writing the update disc.
• Make sure to write in "Disc at Once".
• Set the file compatibility to "JOLIET format".
If the writing method is not correct, the update results in an error.
4.2.2 Update procedure
(1) Turn the power of the main unit ON, and insert the update disc.
(2) The TV screen shows the display as shown as below after a while, select "Start" and then press "ENTER" with the remote control
unit.
Firmware upgrade
Cancel Start
(3) When "Erase and Program Do Not Power Off" is displayed on the TV screen and the tray opens in a few seconds, remove the
update disc.
(4) Wait for about three minutes.
(5) When the firmware updating is completed, the tray closes automatically and the power is turned OFF.
(6) Turn the power ON, and then check the firmware version.
1-12 (No.YD118)
TROUBLESHOOTING
5.1 ELECTRICAL TROUBLESHOOTING GUIDE
5.1.1 POWER CHECK FLOW
SECTION 5
A. B.
No 5V No 3.3VA
Is 3.3VA
NO
NO
section working?
YES
Is 5.6V present at
collector of Q126?
YES
No 3.3VA
NO
Replace Q126. Check FR101 Replace Q121.
Is there a DC voltage at
NO
cathode of D105 or D107?
Is 3.3VA
section working?
YES
Is 3.3V
present at emitter
of Q121?
YES
YES
Check D105/D106/D107/
D108 and replace.
YES
Replace IC101.
(No.YD118)1-13
5.1.2 SYSTEM OPERATION FLOW
Power on
1. 8032 CPU initializes SERVO, DSP&
RISC registers
2. Write RISC code to SDRAM
3. Reset RISC
Show LOGO
YES
Tray closed?
NO
Tray close to closed position
SLED at inner side?
NO
SLED moves to inner position
1. Judge whether have disc and disc type
2. Jump to related disc reading procedure
Recieve
OPEN/CLOSE key?
YES
YES
1. Execute pressed key & IR key
2. System operation routine loop
1. Stop playback & open tray
2. Display tray open message & LOGO
NO
1-14 (No.YD118)
NO
YES
Receive CLOSE key?
5.1.3 SYSTEM TEST FLOW
TEST
Check the AC
Voltage power PCBA (110V or
220V)
YES
Switch on the power PCBA
Is the DC
voltage outputs OK?
(5V, 3.3V, 12V, 5.6V
MOTOR)
YES
Make sure the main PCBA don't
short on VCC and switch it on.
YES
Is 3.3V and 1.8V DC
outputs normal on main
PCBA?
YES
NO
NO
NO
Replace power PCBA or AC transformer.
Repair or replace power PCBA
Check the regulators or related diodes.
Connect to PC RS232 cable and
update the FLASH memory code.
Update FLASH
successfully?
YES
A
NO
1. Check 27MHz system clock.
2. Check system reset circuit.
3. Check FLASH R/W enable signal PRD,
RWR.
4. Check RS232 SIGNALS.
5. Check FLASH memory related circuit.
(No.YD118)1-15
A
RESET or power on.
Show LOGO?
YES
NO NO
Flash
memory operates
properly?
YES
SDRAM
NO
works properly?
YES
ZR966
NO
VIDEO outputs
properly?
YES
Have TV
NO
signal output?
YES
Check AV cable
connection to TV set.
Check connection lines
between FLASH & ZR966
and the FLASH access time
whether is suitable or not.
Check connection lines
between SDRAM & ZR966
and the SDRAM is damaged.
Check the related circuit of
ZR966
Check the filtering and amp
circuit of TV signal.
move inside when it is not
Does tray
at closed position?
YES
B
NO
Normal
TROUT & TRIN
signals?
YES
Normal
TRCLOSE & TROPEN
signal?
YES
Normal
LOAD+ & LOAD
signal?
YES
Check the cable
connection between main
PCBA and loader.
NO
NO
NO
Check the load OPEN &
CLOSE switch
Check the tray control IO
pins on ZR966 & AM5869S
Check the tray control
amplifying circuit on motor
driver.
1-16 (No.YD118)
B
Does the
SLED move
to inner side when it is at
outer position?
YES
Do not put in disc and
tray close.
Optical Lens has
movements for searching
Focus?
Motor
driver DRVSB pin
is high?
YES
Is SLED_S
DC Level higher than
1.4V?
YES
SL+
and SL- output
properly?
YES
Check the cable connection
with MECHA.
Proper
FOCUS_S outputs to
motor driver?
YES
NONO
NO
NO
NONO
Check the connection line of
DRVSB signal.
Check the related circuit of
Sled_S.
Check the amp circuit on
motor driver.
Check FOCUS_S connection
on ZR966 and motor driver .
C
YES
Proper
F+ & F-
outputs?
YES
Check cable connect on
with pick-up head.
NO
Check the amp circuit on
motor driver.
(No.YD118)1-17
Loading...