Service manual

CD-DV999W/CD-DV777W
2 – 9
4. CD-ROM Write Mode
4.1. Outline
DVD-ROM can be upgraded from CD-ROM. The write mode is
entered from the normal mode.
1. When any CD-ROM for version upgrade DVD is detected, the sta-
tus informs that the version upgrade ROM is being read.
When DVD microcomputer is changed to System microcomputer
and byte 24 status data detects 0Fh:
• The TEST Mode is entered by the status reception. (Required to
be internally recognized.)
• The Power button /Function switching is prohibited.
(Power supply is necessary until write is completed.)
• It is prohibited to accept any button input until write is com-
pleted.
• Change the display as follows:
TOC READ
2. To expand into RAM, DVD performs read-operation.
3. When reading ends, transmission stops for writing.
(Ignore stoppage of transmission during write.)
When transmission stops, the transmission port receives write
states, which are displayed according to port states.
4. The DVD/CD tray will automatically open when end of rewrite is
detected.
(The DVD status is not relevant since there is no communication.)
5. To close the DVD/CD door, cancel the TEST Mode and reset when
the Power button is pressed.
6. To initialze the E2PROM, do the shipping TEST mode.
Standard Specification of Stereo System Error Message Display Contents
(*) CHECKING:
If CD changer mechanism error is detected, 'CHECKING' will be dis-
play instead of 'ER-CD**'. 'ER-CD**' display will only be display when
error had been detected for the 5 th times.
Speaker abnormal detection and +B PROTECTION display
In case speaker abnormal detection or +B PROTECTION had
occurred, it can be check by pressing 'POWER', ' ' and 'X-BASS'
button. MicroComputer version number will displayed as "UD".
Press ‘GAME/VIDEO’ button during version number display and then
press ‘POWER’, ‘MEMORY/SET’ and ‘GAME/VIDEO’ button. Display
will show "S** B**". S is referring to speaker abnormal detection and B
is referring to +B PROTECTION. ** is in hex valve.
+B PROTECTION is condition when irregular process occur on power
supply line.
BEFORE TRANSPORTING THE UNIT
The following process need to be taken after set tapering/parts
replacement.
7. Press the ON/STAND-BY button to enter stand-by mode.
8. While pressing down the button and the X-BASS/DEMO but-
ton, press the ON/STAND-BY button. The Micro Computer version
number will be displayed as "UD".
9. Press OPEN/CLOSE button until "WAIT"→ "FINISHED" appears.
10.Unplug the AC cord and the unit is ready for transporting.
DVD DATA DVD CLK State Unit display
1 L H During read FLASH WR
2 H L During write FL W : S T R
3 H H Write ended FL W : E N D
4 L L Write error FL W : E R R
Error Contents Display Notes
CD CD Changer Mechanism Error. 'ER-CD**' (*) 10: CAM SW Detection NG during normal operation
11: CAM SW Detection NG during initialize process
20:TRAY SW Detection NG during normal operation
21:TRAY SW Detection NG during initialize process
DVD Communication Error. 'ER-CD30' DVD COMMUNICATION ERROR.
Focus Not Match/IL Time Over. 'NO DISC'
TUNER PLL Unlock. PLL Unlock.
F
M 87.50 MH
z