Test Mode
The test mode allows you to diagnosis problems and make adjustments using the remote commander and TV monitor. The instructions and re- sults 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 re- trieves 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.
0. 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 origi- nal 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.
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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.
Servo Usage - Automatic Disc Identification
Servos used | Servos NOT used |
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Sled moves laser | Sled moves laser assembly to home position |
outward slightly | at Manual Adj. entry (pressing the # 2 button) |
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Laser | Tilt motor resets platform to mid position at |
| Manual Adj. entry (pressing the # 2 button) |
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Focus | Tracking |
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Spindle motor kick | Spindle motor servo (lock) |
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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 iden- tification. 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. An emergency code list is found in the service manual.
