Sharp DV-L88S/S Service Manual page 15

BATTERY END VOLTAGE ADJUSTMENT
1. Initial setting
(1) Power supply
Input 6.15V±0.05V to the DVD battery.
Note1) Set the voltage on the DC input jack PWB of the main unit to the value specified above in the condition of
DVD start-up (LCD lit).
Note 2) Check the voltage with a calibrated measuring instrument. In case that drift is worried, check the voltage
periodically.
2. Battery end voltage adjusting procedure and method
(1) Select the battery detection error compensation adjustment mode.
1 Turn on the main power switch on while pressing the "UP" "DOWN" keys of the main unit at the same time.
2 Press the mode selection key.
3 Press the sound volume down button twice to enter the battery adjusting screen.
4 With button changing button, make the cross key to the cursor mode. (With 70 type remote controller, the cursor
key can be used for operation as it is.)
(2) Adjust with the right and left key so that the "BAT" value displayed on the LCD becomes "0".
No. Item Checked place
1 S image Y output S terminal
2 S image C output S terminal
3 Error rate check Display
4 Flash memory Display
check
5 Sound level check Audio output
L/R
6 Digital sound Digital sound
output check output
7 Distorted disc Played image
playback check
Checking method
1. Play the test disc TDV - 581A.
2. Check the Y output with an
oscilloscope.
1. Play the test disc TDV - 581A.
2. Check the C output with an
oscilloscope.
1. Press the STOP key and the
PLAY key of the main unit key 20/4
at the same time and check
the error rate displayed on the
display.
1. Press the return key and the
VOL-UP key of the main unit
key at the same time.
Transmit the numeric number
key of R/C (1), next transmit
play to check the model name
and the region code, and
transmit play again to check
the software Ver.
Play the title 49, chapter 1AC - 320 1.35Vrms ± 0.3Vrms
mode of the test disc TV - 501 to
check the sound output level.
Connect the digital surround
processor to the digital sound
output and play the VCD to check be played properly.
the sound output from the digital
surround processor.
Play the test disc TDV - 533 to
check the played image on the
monitor screen.
15
Standard, condition
1Vp-p ± 0.15Vp-p
S terminal Y output
Measure at 75Ω
termination.
0.286Vp-p ± 0.15Vp-p
S terminal C output
Measure at 75Ω
termination.
V-CD:TDV-581A When playing back.
DVD:TV-501
38/76
Model name of the When NO DISC.
software
Region code
Software Ver.
The sound from the digital
surround processor must
It must be normally played.
* No EJECT, rickety play
or staying in LOAD
condition are allowed.
DV-L88S/S(H)
DV-L88W/W(A)
Remarks