The test mode allows you to diagnosis problems and make adjustments
using the remote commander and TV monitor. The instructions and results
are given on the TV screen (OSD).
Test Mode Access
1. Plug in the DVD player,
2. Select DVD on the remote,
3. Aim the remote at the DVD player; and
4. Press the TITLE, CLEAR and POWER buttons one after another. The red standby light changes to green and
the blue Dolby Digital light will come on. The display will momentarily flash
DIAG START as IC202 retrieves the program from the flash ROM IC205.
Exit
To leave the test mode, turn the power off.
Tests
The initial test mode menu shows seven options. Selecting a number enters
that option level. You can navigate through each menu of that level using the
remote’s PREV or NEXT keys. The RETURN key brings you to the previous level.
Syscon Diagnosis
This is a communications test between IC202 and IC on the parallel bus and
is similar to the quicker checks that occur during power ON. If the unit powers
on, it will usually pass this check. Writing
information in and reading the same information checks most ICs. When the two match, the IC is deemed good.
This testing occurs when the TV screen changes to a blue background. The IC is
good if the original menu reappears. In
this check, the remainder of the video IC401 is tested by producing a video
patterns to confirm operation. The audio IC501 is instructed to produce
individual audio tones to each channel.
In checking the A/V Decoder (CDX1930 IC401), the OSD words “CHG_COLCON”
mean this part of the IC is OK.
1. Drive Auto Adjustment
Automatically plays the disc and reloads new data into EEProm IC201. This is used when memory IC201 or the optical
assembly is replaced. Test discs are
required for these adjustments. The Super Audio CD (SACD) procedure is in this
generic test program, but this DVD player cannot play SACDs.
2. Drive Manual Adjustment
Servo adjustments stored in EEProm IC201 can be altered manually. This operation
is useful if you want to determine if the player can identify the disc type as
the first step in playing the disc.
Within the Manual Adjustment is a Servo Control subsection that permits
you to turn on each servo separately for observation. You can also play the
disc and observe an eye pattern when all servos are on (sled does not come on
in PB).
3. Mechanical Aging
This mode cycles the tray in, and then momentary plays the disc for
identification. The number of cycles and the disc type found is displayed on
the TV screen.
4. Emergency History
This is the most valuable diagnostic information in the test mode. The last
failure is recorded in EEProm IC201 and displayed on the TV. Ten codes may all
pertain to one failure that affects various parts of the DVD circuitry that is
monitored.
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