DV-650
DV-650W
NoYes
Check the line between the IC707 pin 52 and the Q301 base through Q304. heck the line between the IC303 pin 45 and the Q307 base.Check the D 3.3V (1) line and the A 5V line.Check the line between the Q301 and Q307, AB connector.Check the loading switch.Check for contamination of objective lens of optical pickup.Replace the optical pickup unit.
Check the line between the IC303 pin 21 and the IC707 pin 38.Check the IC707 power source periphery circuit. If it is normal, replace IC707.Check the focus control signal (FOO) line between the IC702 and the IC504.Check AT 8V line.Is 8V voltage applied to the IC702 pin 21?Replace IC702.Check the line between the IC702 and the AB connector.
NoNoNoNoNoNo
NoNoNoNoNo
YesYesYesYesYesYes
YesYesYesYesYesYesYesYes
FLOW CHART NO.14The disc is ejected.(When the laser beam does not light.)Is the Q301 (LD POWER ON) drive signal (SEL) output to the IC707 pin 52? Is the Q307 (LD POWER CTL) drive signal (LDO1) output to the IC303 pin 45?(Checking of symptom)Is 3.3V voltage applied to the Q301 emitter? Is 5V voltage applied to the Q307 emitter?Are 3.3V and 2.3V voltages applied to the AB connector pin 11 and 9, respectively?Check the connection of optical pickup cable. If it is normal, replace the optical pickup.FLOW CHART NO.15Both video and audio do not operate normally.Set the disc on the disc tray.Is it possible to hold normally the disc with the chuck?Is the level of RF signal which is output from the IC303 pin 28 normal?Replace the main PWB unit.Check the video amplifier unit and the audio amplifier unit. (IC2002-4, IC801-3)
FLOW CHART NO.13The disc is ejected.(In case of focus error)Is FE signal input into the IC707 pin 38? (Checking of symptom)Is the focus control signal output to the IC707 pin 43?Is the focus control signal from the IC504 pin 43 input into the IC702 pin 19?Is the focus control drive voltage output from the IC702 pins 17 and 18?Is the focus control drive voltage applied to the AB connector pins 4 and 2?Check the connection of optical pickup cable. If it is normal, replace the optical pickup.
YesNoNo
No
NoYes
Check the secondary circuit AT 12V line.Check the IC9001 periphery circuit and AT 12V line.Refer to the flow chart No.8 <The power cannot be turned on>.Check the periphery circuit when Q9001 is heated.Replace Q9001.Check the secondary circuit AT 5V line.Check the IC9003 periphery circuit and AT 5V line.Check the LD-REV/FWD signal line between the IC702 and the IC504.Check AT 8V line.Is 8V voltage applied to the IC702 pin 21?Replace IC702.Check the line between the IC702 and the AG connector.Refer to (When the focus servo does not function).Is there input signal on the IC303 pins (49, 54), (50, 55), (46, 52), and (47, 53)?Is there output signal on the IC301 pins 18, 17, 16, and 15?Check the connection of optical pickup cable. If it is normal, replace the optical pickup.
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Yes
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FLOW CHART NO.9AUDIO 9V is not output.Is 12V voltage supplied to the IC9001 pin 3?Is there output to the IC9001 pin 1?Is 9V voltage output to the Q9001 collector?Check for load circuit short-circuiting or leak.FLOW CHART NO.10PC 3.3V is not output.Is 5V voltage supplied to the IC9003 pin 1?Is there output to the IC9003 pin 2?Check for load circuit short-circuiting or leak.FLOW CHART NO.11The disc tray cannot be opened and closed.Is the signal from the IC504 pins 70 and 69 input into the IC702 pins 6 and 7?Is the loading motor drive voltage output from the IC702 pins 10 and 11?Is the loading motor drive voltage applied to the AG connector pins 3 and 2?Check for mechanism and gear engagement and breakage.FLOW CHART NO.12The disc is ejected.(In case of focus error)Does the optical pickup move up and down after the disc is removed? (Checking of symptom).Is FE signal output to the IC303 pin 21 when the disc is set?
10-2 |
ACEC
SHARP
