23
Mar.2003
Check DIGITAL OUT 48KHz.
• Audio at a sampling rate of 48 kHz will be output from the OPTICAL
OUT jack.
* Set your speakers for optical input.
• A triangle wave will be output from L, and a sine wave from R.
• Check the audio, and press [ ] to proceed to the next step.
Check DIGITAL OUT 44.1KHz .
• Audio at a sampling rate of 44.1 kHz will be output from the OPTICAL
OUT jack.
* Set your speakers for optical input.
• A triangle wave will be output from L, and a sine wave from R.
• Check the audio, and press [ ] to proceed to the next step.
6:LCD Test
fig.13-7_70
Check the LCD.
• Press [ ].
• A pattern in four-level greyscale will appear in the LCD. Turn the
contrast adjustment knob all the way to left and right, and verify that the
contrast changes. Then adjust the knob for optimal contrast.
fig.13-8_70
• Press [ ].
• Verify that the all-pixel-on screen is not missing any pixels, and that the
darkness is uniform.
fig.13-9_70
• Press [ ].
• Verify that the all-pixel-off screen has no pixels “stuck on,” nor any
obvious extraneous display artifacts.
fig.13-10_70
• Press [ ] to proceed to the next test item.
7: Encoder Test
fig.13-11_70
Check the encoder.
• Turn the encoder clockwise once, and counter-clockwise once. If
clockwise rotation produces a value of +24 and counter-clockwise
rotation produces a value of -24, the LCD screen will indicate “OK,” and
Problem Items to check
No sound is output for any test
No sound from MAIN OUT MAIN BOARD
MAIN OUT L&R NG MAIN BOARD IC545
MAIN OUT L only NG MAIN BOARD
MAIN OUT R only NG MAIN BOARD
DIRECT OUT L&R NG MAIN BOARD CN512,
DIRECT OUT L only NG MAIN BOARD
DIRECT OUT R only NG MAIN BOARD
COAXIAL IN NG MAIN BOARD JK502
No output from COAXIAL OUT MAIN BOARD JK502
OPTICAL IN NG MAIN BOARD CN507
No output from OPTICAL OUT MAIN BOARD CN508
Problem
Items to check
Contrast does not change SUB BOARD VR1A,IC20,Q25
LCD BOARD CN17,Q30
Incorrect display MAIN BOARD IC501,IC503,CN501
LCD BOARD CN16,CN17
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