Panasonic SC-XH70, Service Manual

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6.2.1. Service Mode Table 1 (For DVD)
Initial setting of
laser drive
current
Jitter check 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)
Jitter rate Jitter check
mode
(Display 2)
Lead
Error
Counter Focus Drive
Value
Press [POWER] or [STOP]
button to exit.
In STOP (with disc inside
tray) mode, press [STOP]
button on the main unit,
and [5] button on
the remote control unit.
Press [FL Display] on
remote control unit for next
page (FL Display).
Error code
check
Error code check
The latest error code stored in the
EEPROM IC is displayed.
Note: Refer to "[Section 6.5] DVD Self
Diagnostic Function-Error Code" for
more detailed information on the error
codes.
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
F / H / U
To exit, press [POWER]
button on main unit or
remote control.
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.
Press [FL Display] on
remote control unit for next
page (FL Display) on values
of laser drive current.
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.
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.
(Display 1)
Laser current
measurement
mode
(Display 2)
CD
Laser DVD Laser
FL Display
Key Operation
Front Key
Item
Description Mode Name