JVC XV-M565BK Service Manual page 22

XV-M565BK/M567GD
(4) Focus ON NG
* Is FE output ? --- Pattern, IC101
* Is FODRV signal sent ? (R288) --- Pattern, IC201
* Is driving voltage sent ?
CN102 "9", "11" --- If NG, pattern, driver, mechanical unit (with the power turned off, measure the
* Does CN101 "14"(SRF1) become "H" and is the focus drawing in done?
--- Mechanical unit (laser power too low), IC101(defective gain)
--- Moreover, It is thought that abnormality is found in the disk.
* Mechanical unit is defective.
(5) Tracking ON NG
* When the tracking loop cannot be drawn in, IC201 "58" (/TRON) does not become "L".
* Mechanical unit is defective.
Because the undermentioned adjustment value is abnormal, it is not possible to draw in normally.
* Periphery of driver (IC271)
Constant or IC it self is defective.
(When passing without becoming abnormal while adjusting the following.)
* Servo IC (IC201)
When improperly adjusted due to defective IC.
[Focus position rough adjustment]
[Phase difference cancellation rough adjustment]
[Tracking balance adjustment]
(6) Spindle CLV NG
* When the spindle cannot be shifted to CLV Servo, does not become "H" between IC301 "88"
and IC201"18".
* IC101 Is signal output from CN104 "1" (RFOP)?
* IC101 Is signal output from CN104 "12" (FLTOUT)?
* IC101 Is signal output from CN104 "7" "8" "9" "10" (binary-coded clock and data)?
* IC201 Is "58" (/TRON) at "L" level ?
* Besides the causes mentioned below, it is difficult to point out a specific one because there are various
factors that should be considered.
Mechanism is defective.(jitter)
IC101, IC201.
(7) Address read NG
* Besides the causes mentioned below, it is difficult to point out a specific one because there are various
factors that should be considered.
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)
* Defective mechanism
* The ICs surrounding the driver IC (IC271) are defective.
* Servo IC (IC201) is defective.
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resistance between CN102 "9" and "11").