JVC XVS40BK XVS42SL XVS45GD XVS30BK SERVICE MODE AND MECHANICAL DISASSEMBLING

JVC  XV-S40BK - XV-S42SL - XV-S45GD  - XV-S30BK - service  mode and mechanical disassembling 

Disassembling

Loading assembly section

Removing the clamper assembly

Remove the four screws A attaching the clamper assembly.
Move the clamper in the direction of the arrow to release the two joints A on both sides.)

Removing the tray

Prior to performing the following procedure, remove the clamper assembly.

Push b of the slide cam into the slot on the left side of the loading base until it stops.
Draw out the tray toward the front.

Removing the traverse mechanism assembly

Prior to performing the following procedure, remove the clamper assembly and the tray.
Remove the four screws B attaching the traverse mechanism assembly.

Removing the elevator

Prior to performing the following procedure, remove the clamper assembly, the tray and the traverse mechanism assembly.
Extend each bar e inside of the loading base outward and detach the elevator shaft.

Removing the motor assembly

Prior to performing the following procedure, remove the clamper assembly, the tray, the traverse mechanism assembly and the elevator.
Remove the belt from the pulley.
Remove the screw C attaching the motor assembly.
Turn over the body and remove the screw D attaching the motor assembly.
Release the two tabs g retaining the motor board.

Adjustment method
(1) Initialization method
(2) Display of "Laser current value" and "Jitter value"
If microprocessor (IC401,IC402,IC403) or pick-up is replaces, initialize the
DVD player in the following matter
1)Take out the disc and close the tray.
2)Unplug the power plug.
3)Insert power plug into outlet while pressing both PLAY button and OPEN/CLOSE button.
4)FL Display indicate "TEST " . :Version, :Region code
5)Press 3D-PHONIC key button of remote controller. and EEPROM initialize start.
6)When indicate "DTS" on the display, initialize finishes.
7)The power is turned OFF, and Unplug the power plug.
1)Take out the disc and close the tray.
2)Unplug the power plug.
3)Insert power plug into outlet while pressing both PLAY button and OPEN/CLOSE button.
4)FL Display indicate "TEST " . :Version, :Region code
5)Press the "OPEN/CLOSE" button to move the tray outward.
Put the test disc (VT-501) on the tray and press "OPEN/CLOSE" button.
The tray should move inward (Note:Don't push to close the tray directly by hand etc.)
6)Press the "PLAY" button.
7)The laser current value and the jitter value is displayed on the FL

For Laser current value
The laser current value becomes 40mA for the above-mentioned.
Becomes a test mode by doing above-mentioned procedure 1) - 4). Afterwards, the laser current value can
be switched by pushing the key to remote control without turning on the disk.

Remote control "4" key --- Laser of CD
Remote control "5" key --- Laser of DVD
*Returns to a usual test mode by the thing to push the stop button of remote control.

If the laser current value is 64mA or less, it is roughly good. There is a possibility to which pick-up is deteriorated, and exchange pick-up, please when there are 65mA or more laser current value.

Check points for each error
(1) Spindle start error
1.Defective spindle motor
*Are there several ohms resistance between each pin of CN201 "5-6","6-7","5-7"?
(The power supply is turned off and measured.)
*Is the sign wave of about 100mVp-p in the voltage had from each terminal?
[ CN201"9"(H1-),"10"(H1+),"11"(H2-),"12"(H2+),"13"(H3-),"14"(H3+) ]
2.Defective spindle motor driver (IC251)
*Has motor drive voltage of a sine wave or a rectangular wave gone out to each terminal(SM1~3)
of CN201"5,6,7" and IC251"2,4,7"?
*Is FG pulse output from the terminal of IC251"24"(FG) according to the rotation of the motor?
*Is it "L(about 0.9V)" while terminal of IC251"15"(VH) is rotating the motor?
3.Has the control signal come from servo IC or the microcomputer?
*Is it "L" while the terminal of IC251"16"(SBRK) is operating?
Is it "H" while the terminal of IC251"23"(/SPMUTE) is operating?
*Is the control signal input to the terminal of IC251"22"(EC)?
(changes from VHALF voltage while the motor is working.)
*Is the VHALF voltage input to the terminal of IC251"21"(ECR)?
4.Is the FG signal input to the servo IC?
*Is FG pulse input to the terminal of IC201"53"(FG) according to the rotation of the motor?

(3) Traverse movement NG

1.Defective traverse driver
*Has the voltage come between terminal of CN101 "1" and "2" ?
2.Defective BTL driver (IC271)
*Has the motor drive voltage gone out to IC271"17" or "18"?
3.Has the control signal come from servo IC or the microcomputer?
*Is it "H" while the terminal of IC271"9"(STBY1) ?
*TRSDRV Is the signal input?
4.TRVSW is the signal input from microcomputer?

(4) Focus ON NG
* Is FE output ? --- Pattern, IC101
* Is FODRV signal sent ? (R279) --- Pattern, IC201
* Is driving voltage sent ?
IC271 "13", "14" --- If NG, pattern, driver, mechanical unit .
* Mechanical unit is defective.

(5) Tracking ON NG
* When the tracking loop cannot be drawn in, TE shape of waves does not settle.
* Mechanical unit is defective.
Because the self adjustment cannot be normally adjusted, the thing which cannot be normally
drawn in is thought.
* Periphery of driver (IC271)
Constant or IC it self is defective.
* Servo IC (IC201)
When improperly adjusted due to defective IC.

(6) Spindle CLV NG
* IC101 -- "35"(RF OUT), "30"(RF-), "31(RF+).
* Does not the input or the output of driver's spindle signal do the grip?
* Has the tracking been turned on?
* Spindle motor and driver is defective.
* Additionally, "IC101 and IC201" and "Mechanism is defective(jitter)", etc. are thought.

(7) Address read NG

* Besides, the undermentioned cause is thought though specific of the cause is difficult because various
factors are thought.
Mechanism is defective. (jitter)
IC201, IC301, IC401.
The disc is dirty or the wound has adhered.

(8) Between layers jump NG (double-layer disc only)
Mechanism defective
Defect of driver's IC(IC271)
Defect of servo control IC(IC201)

(9) Neither picture nor sound is output

1.It is not possible to search
*Has the tracking been turned on?
*To "(5) Tracking ON error" in "Check points for individual errors" when the tracking is not normal.
*Is the feed operation normal?
To "(3) traverse movement NG" in "Check points for individual errors" when it is not normal.
Are not there caught of the feeding mechanism etc?