DV-620H
DV-620S
NoYes
Check the IC401 DAC power source periphery circuit. If it is normal, replace IC401.Check the focus control signal (DA0) line between the IC702 and IC401.Check PC 8V line.Is 8V voltage applied to the pin(8) of IC702?Replace IC702.Check the line between the IC702 and the focus actuator.Check the line between the pin(150) of IC401 and the base of Q301 through Q304. Check the line between the pin(45) of IC302 and the base of Q307.Check the A_5V line.Check the line between the Q301, Q307 and pickup terminal.Check the loading switch.Check for contamination of objective lens of optical pickup.Replace the optical pickup unit.
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YesYesYesYesYesYesYesYesYesYesYes
FLOW CHART NO.18The [No Disc] indication. (In case focus servo doesnot function.)Is the focus control signal output to the pin(14) of IC401?Is the focus control signal from the pin(14) of IC401 input into the pin(23) of IC702?Is the focus control drive voltage output from the pins (17) and (18) of IC702?Is the focus control drive voltage applied to the terminal of focus actuator?Check the connection of optical pickup cable. If it is normal, replace the optical pickup.FLOW CHART NO.19The [No Disc] indication. (When the laser beam does not light.)Is the Q301(LD POWER ON) drive signal (VOSCON) output to the pin(150) of IC401? Is the Q307(LD POWER CTL) drive output to the pin(45) of IC302? (Checking of symptom.)Is 5V voltage applied to the emitter of Q301 and Q307?Are the 5V and 2.3V voltage supplied to the pins (11) and (9) of pickup terminal.Check the connection of optical pickup cable. If it is normal, replace the optical pickup.FLOW CHART NO.20Both picture and sound do not operate normally.Set the disc on the disc tray.Is it possible to hold normally the disc with the check?Is the level of RF signal which is output from pin(28) of IC302, normal?Replace the main PWB unit.Check the video amplifier unit and the audio amplifier unit.(Q209, Q210, Q211, IC6001)
No
YesNo
Yes
Replace IC702.Check PC 8V line.
Check the secondary circuit, AT 5V line.Check for load circuit short-circuiting or leak.Replace IC9004.Check the S8102 and OPEN/CLOSE KEY line.Replace IC8201.Check the line between the pin(106) of IC504 and the pin(11) of IC8201. (Check the TRAY ACK line and Q8202.)Check the LD-RVS/FWD signal line between IC702 and the IC504.Is 8V voltage applied to the pin(8) of IC702?Check the line between the IC702 and the loading motor.See FLOW CHART NO.18<The [No Disc] indication. (In case focus servo does not function.)>Replace IC302.Is there input signal on the pins(50,55) and (49,54) of IC302?Check the connection of optical pickup cable. If it is normal, replace the optical pickup.
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Does the optical pickup move up and down after the disc is removed?(Checking of symptom.)
FLOW CHART NO.14PC 2.5V is not output.(PC 3.3V(1), (2) is possibleIs 5V voltage supplied at pin(1) of IC9004?Is voltage of 2.5V sent out from the pin(2) of IC9004?Check the IC9004 periphery circuit.FLOW CHART NO.15The disc tray cannot be opened and closed.(For remote control is possible.)Dose the "L" pulse inputted into the pin(13) of IC8201, when the OPEN/CLOSE button is activated on the DVD? Are the "L" pulse outputted from the pin(10) of IC8201?Are the "L" pulse inputted into the pin(11) of IC8201?See FLOW CHART NO.16<The disc tray cannot be opened and closed.>FLOW CHART NO.16The disc tray cannot be opened and closed.Is the signal from the pins(70) and (69) of IC504 input into the pins(1) and (28) of IC702?Is loading motor drive voltage output from the pins(9) and (10) of IC702?Is the loading motor drive voltage applied to the terminal of loading motor?Check for mechanism and gear engagement and breakage.The [No Disc] indication. (In case of focus error)FLOW CHART NO.17Is FE signal output to the pin(21) of IC302 when the disc is set?Is FE signal inputted into the pin(8) of IC401.Check or replace IC401.Check the line between the IC302 and IC401.
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ACEC
