Panasonic SA-PT750P, Service Manual

Page: 34 / 155

9.2.1. Service Mode Table 1
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 9.5 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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SA-PT750P / SA-PT750PC