HCD-C770/C990
SECTION 1Ver 1.6
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UPRELEASING THE DISC SLOT LOCK
BLOCK OR BASE UNITThe disc slot lock function for the antitheft of an demonstration
disc in the store is equipped.
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential diffReleasing Prerence generatedocedure:
by the charged electrostatic load, etc. on clothing and the human1. Press two buttons of [DISC 1] andx simultaneously for five
body.seconds.
During repair, pay attention to electrostatic break-do2. The message OUNLOCKED� is displayed and the slot is un-wn and also
use the procedure in the printed matter which is included in thelocked.
repair parts.Note:When OLOCKED� is displayed, the slot lock is not released by
The flexible board is easily damaged and should be handled withturning power on/off with the [POWER] button.
care.
CHECKING OF OPERATIONS WITH REMOTE
NOTES ON LASER DIODE EMISSION CHECKCOMMANDERS OF DIFFERENT MODELS
The laser beam on this model is concentrated so as to be focusedSome of the signal of remote commander vary between generation
on the disc reflective surface by the objective lens in the opticalof player.
pick-up block. Therefore, when checking the laser diode emis-Between DAV-S400/S500/S800/C450/C700/C900 and DAV-S550/
sion, observe from more than 30 cm away from the objectiS880/C770/C900, remote commander signal codes ofve lens.
OFUNCTION�, OBAND�, OST/MONO� and OMEMORY� are
different.
NOTE OF REPLACING THE DVD BOARDTake notice of the above when you check the operation with remote
When replacing the DVD board, since the adjustment vcommanders of difalue is not ferent models.
set up correctly, ODrive Auto Adjustment� canOt be performed.
In this case, initialize Memory in the following procedures.
Procedure:
1. Set the test mode. (See page 25)
2. Press the [2] key of the remote commander, and set the ODRIVE
MANUAL OPERATION�. (See page 26)
3. Press the [6] key of the remote commander, and set the O2-6,
Memory Check�. (See page 28)
4. Press the [CLEAR] key of the remote commander, and initial-
ize Memory.
JIG ON REPAIRING
When repairing this set, etc., connect the extension cable as the
figure shown below.
extension cable
(DVD board-AMP board)extension cable
(Part No. J-2501-198-A)(relay board-DVD board)
(Part No. J-2501-143-A)
extension cable
(DVD board-AMP board)
(Part No. J-8000-024-A)
extension cable
(RF board-DVD board)
(Part No. J-2501-217-A)
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ACEC
