DV-L88S/S(H)
DV-L88W/W(A)
No
Check the line between the IC705 and the focus actuator.Check the line from the pin 37 of IC701 to the base of Q301. Check the line between the pin 45 of IC301 and base of Q302. Check the line between S801 and R323.Check the D_3.1V line and A_5V line.Check the Q301 and line between Q302 and CN301.Check the line between the pin 4 of IC301 and base of Q303. Check the line between S801 and R323.Check the A_5V line.Check the line between Q304 and CN7301.Check tray switch. S801, 802Check for contamination of objective lens of optical pickup.Replace the optical pickup unit.
NoNoNoNoNoNoNoNoNoNoNoNoNo
YesYesYesYesYesYesYesYesYesYesYes
Focus control drive voltage applied to 27, 29 pin of CN7301 (focus actuator terminal)? Check the connection of optical pickup cable. If it is normal, replace the optical pickup.FLOW CHART NO.7The DVD disc is not recognized. (When the laser beam does not go on)Is the drive signal (SEL) of Q301 (LD POWER ON) being output to the pin 37 of IC701? Is the drive signal (LDO1) of Q302 (LD POWER CTL) being output to the pin 45 of IC301? When S801 is pressed, is the base of Q303 0.8V?Is the voltage of 3.3V being applied to the emitter of Q301? And, is the voltage of 3.4V being applied to the emitter of Q302?Is the voltage of 3.1V and 2.3V being applied to the pins 14 and 23 of CN7301, respectively?Check the connection of optical pickup cable. If it is normal, replace the pickup.FLOW CHART NO.8The CD disc is not recognized. (When the laser beam does not go on)Is the drive signal (LDO2) of Q304 (LD POWER CTL) being output to the pin 4 of IC301? When S801 is pressed, is the base of Q304 0.8V?Is the voltage of 3.4V being applied to the emitter of Q303?Is the voltage of 2.3V being applied to the pin 9 of CN7301?Check the connection of optical pickup cable. If it is normal, replace the pickupBoth picture and sound do not operate normally.(1)Set disc to mechanism.When cover is closed, disc starts rotating?Is the level of RF signal which is output from pin 28 of IC301, normal?Replace the main PWB unit.Check the main PWB unit.
FLOW CHART NO.9
NoYesYesNoNoYes
Replace IC301.Replace IC705.
Replace the S802.When S802 is pressed, are the pins 3 and 4 short-circuited?Check the connection between pins 2 or 4 of S802 and pin 27 of IC502.Check the cable connecting to the CN7302. (Check the CN7302 and line of pins 2 and 4 of IC705.)Check the cable connecting to the CN7303.Check the M_4.8V line.See FLOW CHART NO.6<The [No Disc] indication. (In case focus servo does not function.)>Is there input signal on the pins(50,55) and (49,54) of IC301?Check the connection of optical pickup cable. If it is normal, replace the optical pickup.In case of CD For DVD, 58, 59, 63, and 64Check the IC701 DAC power source periphery circuit. If it is normal, replace IC701.Check the focus control signal (DA0) line between the IC705 and IC701.Check M_5V line.Is 8V voltage applied to the pins 8 and 27 and 25 and 24 of IC705?
NoNoNoNoNoNoNoNoNoNo
YesYesYesYesYesYesYesYesYesYes
The disc does not rotate.
FLOW CHART NO.4Is the tray lid open?Does the pickup move in the direction of inner periphery?After moving in the direction of inner periphery, does the pickup move in the direction of outer periphery?Is 4.8V being applied to the pins 16 and 17 of IC7701?Replace the IC7701.FLOW CHART NO.5The [No Disc] indication. (In case of focus error)When removing disc and applying load to spin motor (by stopping with hand, etc.), objective lends moves up and down? (Checking item to symptom) Note) If load is not applied to spin, lens does not move and becomes NO DISC immediately.Is FE signal output to the pin 21 of IC301 when the disc is set?Is FE signal inputted into the pin 150 of IC701.Check or replace IC701.Check the line between the IC301 and IC701.FLOW CHART NO.6The [No Disc] indication. (In case focus servo does not function.)Is the focus control signal output to the pin 14 of IC701?Is the focus control signal from the pin 158 of IC701 input into the pin 20 of IC705?Is the focus control drive voltage output from the pins 29 and 30 of IC705?
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ACEC
SHARP
