Test Mode; Explanation Of Operation At The System Start - Sharp DV-550U Service Manual

9. TEST MODE

Memory Test Mode
Video Test Mode
Mecha Test Mode
Servo adjustment
value read mode

10. EXPLANATION OF OPERATION AT THE SYSTEM START

DVDOpe( )
Test1
OSD
(F1h)
Adjustment
key
value display
AdjDisplay( )
Power
Off
Program version indicaiton.
Ordinary test pattern indication, and copy guard signal added test pattern indication
are given.
Servo system initialization, tray opening and closing, laser, servo, continuous playback,
jump test are performed.
Sub CPU version indication, VC/FE/TE/RF AVRG, TRVSC, RF LEVEL, FO BIAS,
FO GAIN, TR GAIN indication are given.
Test Mode Operation
DVD Disc detection
Eject or
error
CD Disc
Test0
detection
(F0h)
key
Test0
CDOpe( )
(F0h)
key
OSD
Adjustment
value display
'1' Key
Test0
Key
Memory Test
Model number
Program version
Region code
microcode version
Static Test
Initial resetting
Flash rewriting key
SystemOpe( ) Reset
Start
Eject or
error
Test1
No Disc and
(F1h)
Test 0 (F0h) key
key
Systest( )
Test0
Key
'2' Key
Video Test
Initial Screen
Test Pattern
Note: For test mode input,
"F0h" = S.PICTURE + Stop
"F1h" = S.PICTURE + SKIP (-).
The keys of main body are doubly pressed.
9-1
FlashOpe( )
Power
Off
Branching with
ten keys
Power
Off
'3' Key
Dynamic
Test
Tray Open/Close
Sled Move
DVD Servo
CD Servo
DV-550U