PIONEER DV-646A
Service Manual

DV-646A

FL

Description of Error

Causes if with a DVD

Causes if with a CD

Operation of the Unit
Adjusts focus at the innermost circumference and tries to return to its position where the error was generated (for 3 times),then opens. If the same error persists after one retry, the tray opens. (No FOK pulse)

33 No FOK pulse during When the focus was deviated continuously 20 times. playback CLVA

38 Disc-typesensing error

If normal starting was impossible in the following three cases, disc-type sensing will be retried if other errors occure excepting C5 error. However, when the focus error "33" was occured continuously 3 times, it is finished as "38 error" at the with another disc by (1) startup with the first disc-type-sensing result, (2) forced startup moment: designating the disc type, (3) forced startup with the original disc by designating the disc type.

Open

39

SGC converge timeout

SGC could not converge during detects the peak The unit did not enter Stop mode within 10 seconds of issuance of a Stop command. The spindle could not converge into within ± 12% of the target FG rotation speed within 10 seconds after spindle kick. The first time after startup (the first time after disc distinction), it doesn't become the number of the target rotation within five seconds. The first time after startup, detects the abnormal rotation number of high-speed continuously 3 loops. DVD: 5 to 9 mS , CD: 40 to 60 mS

Open Stop

41 Spindle timeout

48

Spindle FG transition timeout

Stops. (FG timeout)

49

Spindle PLL transition timeout

After the second times after startup, it doesn't become the number of the target rotation Stops. within five seconds. Detects the abnormal high-speed or low-speed rotations. DVD: 5 to ("73" is displayed during 9 mS , CD: 40 to 60 mS starting process.) Stops. ("73" is displayed during starting process.) Stop

4A Spindle lock timeout Spindle could not lock more than 1.5 seconds before start the AFB. Auto sequence timeout of peak 51 detection Auto sequence 52 timeout of focus jump down Auto sequence 53 timeout of focus jump up 54 Auto sequence timeout of play AGC Auto sequence 55 timeout of disc-typesensing Auto sequence 56 timeout of ATB2 ABUSY did not return within 1 second after the DDTCT (peak detection) command was sent. ABUSY did not return within 30 mS after the FJMPD (Focus jump 1 to 0) command was sent. ABUSY did not return within 30 mS after the FJMPU (Focus jump 0 to 1) command was sent. ABUSY did not return within 50 mS after the GSUMON (play-AGC-measuring) command was sent. ABUSY did not return within 2 seconds after the DJSRT (disc-sensing) command was sent. ABUSY did not return within 1 second after the TBLOFS (Internal ATB after the completion of external ATB) command was sent. ABUSY did not return within 500 mS after the TSON (tracking servo ON) command was sent. ABUSY did not return within 200 mS after the TBL (external ATB) command was sent. ABUSY did not return within 2 seconds after the FGN (focus gain adjustment) command was sent. ABUSY did not return within 2 seconds after TGN (tracking gain adjustment) command was sent. ABUSY did not return within 1 second after the CMDAVE (offset adjustment) command was sent.

Stop

Stop

Stop Stop

Stop

Auto sequence 57 timeout of tracking servo ON Auto sequence 58 timeout of ATB1 Auto sequence 59 timeout of focus gain adjustment Auto sequence 5A timeout of tracking gain adjustment Auto sequence 5B timeout of offset adjustment

Stop Stop Stop

Stop

Stop

72