JVC KDSH99R
Service Manual

KD-SH99R

Flow until reading TOC of CD/CD-R/CD-RW
FEED RETURN Becomes DRVMUTE=H and the output of the IC604 driver becomes possible. Picking up is moved to surroundings on the inside until becoming REST SW=L. Afterward, moves in the direction of outer again and stops in the place in which became REST SW=H. FOCUS OFFSET, TRACKING OFFSET, and RF OFFSET are done, and OFFSET of RF AMP in IC603 is corrected.
2.8Vp-p

OFFSET SELF ADJUSTMENT LASER ON Pre SP KICK LENS UP FOCUS ON
2.0Vp-p

400ms turns the spindle motor before the focus search starts. Lens UP of the pick is done. At this time, S character curve becomes about 2.0Vp-p by CTS-1000. The down of the lens and FOCUS ONing are made. Changes into CD-RW MODE, and serches for FOCUS in case of no FOCUS ON even if FOCUS search(UP DOWN) is done three times. The spindle motor is rotated up to the number of necessary rotations. In the state of tracking OFF, do the self adjustment of wavy OFFSET of TE2 to 0. It takes time to adjust the one with a large gap of the traking balance of picking up. At this time, the racking error becomes about 2.8Vp-p by CTS-1000. In the state of traking OFF, do the self adjustment of the RF level of RF(TP601) to 1.0-1.2Vp-p. After adjusts,traking ON is done. Do th eself adjustment of the gain intersection of the focus servo to 1.2kHz (300ms). Do the self adjustment of the gain intersection of the focus servo to 1.2kHz. (300ms). Time expands in DISC that the number of total tracks with CD-TEXT is a lot of. It is a head of 1Tr., and the reproduction begins.

THE SPINDLE START TRAKING BALANCE

RF GAIN FOCUS GAIN TRACKING TOC READING 1Tr. HEAD

Shape of waves when based on Vref(TP602)

FE TP603

TE2 TP605

FEED TP634 SP0 TP636 FE : Focus error signal TE : T Tracking error signla FEED : FEED deive signal SPO : Spindle drive signal

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