Panasonic SA-HT441WP Service Manual page 25

9.2.1. Service Mode Table 1
Item
Mode Name
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.
Error code check
Error code
The latest error code stored in the
check
EEPROM IC is displayed.
Initial setting Initial setting of laser drive current.
Initial current value for each of DVD
of laser drive
laser and CD laser is separately saved
current
in the EEPROM IC.
DVD laser DVD laser drive current measurement
drive current ·DVD laser drive current is measured
measurement and the result is displayed together
with the initial value stored in the
EEPROM IC.
After the measurement, DVD laser
emission is kept on. It is turned off
when POWER key is switched off. (It
is also turned off when POWER button
on the player is switched off.)
ADSC internal
ADSC internal RAM data check
RAM data ·ADSC internal RAM data is read out
check
and displayed.
CD laser drive current measurement
CD laser drive
CD laser drive current is measured
current
and the result is displayed together
measurement
with the initial value stored in the
EEPROM IC.
After the measurement, CD laser
emission is kept on. It is turned off
when POWER key is switched off. (It
is also turned off when POWER button
on the player is switched off.)
Description
Jitter rate is shown in decimal notation to
one place of decimal.
Focus drive value is shown in hexadecimal
notation.
Error code (play_err) is expressed in the
following convention.
Error code = 0 x DAXX is expressed:
Error code = 0 x DBXX is expressed:
Error code = 0 x DXXX is expressed:
Error code = 0 x 0000 is expressed:
* "xx" denotes the error code
The value denotes the current in decimal
notation. The above example shows the
initial current is 34mA and 28mA for DVD
laser and CD laser respectively when the
laser is switched on.
The value denotes the current in decimal
notation.
The above example shows the initial current
is 34mA and the measured value is 32mA.
The value is shown in hexadecimal
notation. The above example shows the
data in ADSC address OFAh is 6901h.
The value denotes the current in decimal
notation.
The above example shows the initial current
is 28mA and the measured value is 26mA.
FL Display
Jitter rate
Jitter check mode
DVDnn UXX
DVDnn HXX
DVDnn FXXX
DVDnn F---
Laser current
measurement
mode
DVD laser current
measurement mode
RAM data for
Address
specified address
CD laser current
measurement mode
25
SA-HT441WP
Key Operation
Front Key
In STOP (no disc) mode,
press STOP button on the
player, and "5" button on
the remote control unit.
Press STOP or OPEN
button to exit.
Press "FL Display" on
remote control unit for next
page (FL Display).
In STOP (no disc) mode,
press STOP button on the
player, and "0" button on the
remote control unit. * With
pointing of cursor up and
down on display.
Cancelled automatically
5 seconds later.
To exit, press [POWER]
button on main unit or
remote control.
In STOP (no disc) mode,
press STOP button on the
player, and PAUSE button
on the remote control unit.
Cancelled automatically
5 seconds later.
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
player, and FUNCTIONS
button on the remote
control unit.
Cancelled automatically
5 seconds later.
Press "FL Display" on
remote control unit for next
page (FL Display) on values
of dvd drive current.
In STOP (no disc) mode,
press STOP button on the
player, and "1" button on
the remote control unit.
To exit, press STOP or PLAY
button.
In STOP (no disc) mode,
press STOP button on the
player, and "3" button on
the remote control unit.
Press "FL Display" on
remote control unit for next
page. (FL Display)