(No.YD017)1-25
5.2
Check points for each error
5.2.1 Spindle start error
(1) Defective spindle motor
• Are there several ohms resistance between each pin of
CN201
"1-2","2-3","1-3"?
(The power supply is turned off and measured.)
• Is the sign wave of about 100mVp-p in the voltage had from each terminal?
[
CN201
"10"(H1+),"11"(H1-),"7"(H2+),"8"(H2-),"5"(H3+),"6"(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
"1,2,3" 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
"18"(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
IC301
"25"(FG) according to the rotation of the motor?
5.2.2 Disc Detection, Distinction error (no disc, no RFENV)
• Laser is defective.
• Front End Processor is defective (IC101).
• APC circuit is defective. ---
Q101
,
Q102
.
• Pattern is defective. --- Lines for
CN101
- All patterns which relate to pick-up and patterns between
IC101
•
IC101
--- For signal from
IC101
to
IC301
, is signal output from
IC101
"20" (ASOUT) and
IC101
"41"(RFENV) and
IC101
"22"
(FEOUT)?
5.2.3 Traverse movement NG
(1) Defective traverse driver
• Has the voltage come between terminal of
CN101
"2" and "4" ?
(2) Defective BTL driver (
IC201
)
• Has the motor drive voltage gone out to
IC201
"17" or "18"?
(3) Has the control signal come from servo IC or the microcomputer?
• Is it "H" while the terminal of
IC201
"9"(STBY1) ?
• TRSDRV Is the signal input? (
IC301
"10")
(4) TRVSW is the signal input from microcomputer? (
IC303
"50")
5.2.4 Focus ON NG
• Is FE output ? --- Pattern,
IC101
• Is FODRV signal sent ? (
R209
) --- Pattern,
IC301
"6"
• Is driving voltage sent ?
IC201
"13", "14" --- If NG, pattern, driver, mechanical unit .
• Mechanical unit is defective.
5.2.5 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 (
IC201
)
Constant or IC it self is defective.
• Servo IC (
IC301
)
When improperly adjusted due to defective IC.
