SA-PT250EE - Panasonic Audio Service Manual (repair manual). Page 22

FL Display

Key Operation

Front Key

Item

Jitter check

Description

Mode Name

Initial setting 

of laser drive 

current

Error code 

check

Cancelled automatically 
5 seconds later.
To exit, press [POWER]
button on main unit or 
remote control.

Press [FL Display] on 
remote control unit for next
page (FL Display) on values
of laser drive current.

Cancelled automatically 
5 seconds later.

Press [POWER] button to  
exit.

In STOP (no disc) mode, 
press [STOP] button on the 
main unit, and [5] button on 
the remote control unit.

Jitter check.
Jitter rate is measured and displayed.  
Measurement is repeatedly done in 
the cycle of one second. Read error 
counter starts from zero upon mode 
setting. 
When target block data failed to be 
read out, the counter advances by one 
increment. When the failure is caused 
by minor error, it may be corrected 
when retried to enable successful 
reading. 
In this case, the counter advances by 
one. When the error persists even 
after retry, the counter may jump by 
two or more.

FL Display sequence:
Display 1    2.

Jitter rate is shown in decimal notation to 
one place of decimal.
Focus drive value is shown in hexadecimal 
notation.

(Display 1)

(Display 1)

(Display 2)

(Display 2)

In STOP (no disc) mode, 
press [STOP] button on the 
main unit, and [0] button on 
the remote control unit. * With 
pointing of cursor up and 
down on display.

Error code check
The latest error code stored in the 
EEPROM IC is displayed.

Note: Refer to "Section 8.3 DVD Self
Diagnostic Function-Error Code" for 
more detailed information on the error 
codes.

In STOP (no disc) mode, 
press [STOP] button on the 
main unit, and [PAUSE] 
button on the remote 
control unit.

Initial setting of laser drive current. 
Initial current value for the DVD laser 
and CD laser is separately saved in 
the EEPROM IC.

FL Display sequence:
Display 1    2.

Press [FL Display] on 
remote control unit for next
page (FL Display).

Jitter rate

Lead
Error
Counter

Focus Drive 
Value

Jitter check
mode

U / H / F

Laser current
measurement 
mode

CD
Laser 

DVD Laser 

Error code (play_err) is expressed in the 
following convention.
Error code = 0 x DAXX is expressed: 

DVDnn U12

Error code = 0 x DBXX is expressed: 

DVDnn H12

Error code = 0 x DXXX is expressed: 

DVDnn F123

Error code = 0 x 0000 is expressed: 

DVDnn F---

* "xx" denotes the error code

The value denotes the current in decimal 
notation.

The above example shows the initial 
current is XXXmA and YYYmA for CD 
laser and DVD laser respectively when 
the laser is switched on.

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