Test 80 (Monitor); Test 90 (Clip); Judgment - Yamaha PC4800N Service Manual

2.3.3.8 TEST 80 (MONITOR)

The monitor screen appears as shown below and judgment is made automatically.
>> 80:MONITOR TEST
TEMP(CH A):29C--<OK>
TEMP(CH B):28C--<OK>
Vpre(CH A):0.67V--<OK>
Vpre(CH B):0.65V--<OK>
VSP(CH A):29.95V--<OK>
VSP(CH B):30.28V--<OK>
ISP(CH A):3.37A--<OK>
ISP(CH B):3.30A--<OK>
------------------<TEST80:OK>
When the TEST 80 result is OK, "—————<TEST 80:END>" appears on the screen.
The test program proceeds to TEST 90 automatically after TEST 80.

2.3.3.9 TEST 90 (CLIP)

The monitor screen appears as shown below.
>>90:CLIP TEST
Waiting for CLIP=NONE...(CH A)
Waiting for CLIP=NONE...(CH B)
------------------<TEST90:OK>
Waiting for CLIP=ON...(CH A)
Remove the load resistance and feed 1kHz, 10dB sine wave to the input terminal
When the TEST 90 result is OK, the screen appears as follows.
Waiting for CLIP=ON... (CH A)
Waiting for CLIP=ON... (CH B)
—————<TEST90:OK>

2.4 Judgment

When the results of all the automatic test items are OK, "—————<TEST ALL:OK>" appears on the screen.
When any of the automatic test items has resulted in NG, that particular test is indicated.
(The example below shows when TEST 40 and TEST 80 have resulted in NG)
————>>>TEST ALL:NG!<<<
—————<TEST 40: NG>
—————<TEST 80: NG>
<Reference>
Described below is the procedure to perform each data port test individually.
1. Preparation
Same as DATA PORT check (automatic)
2. Setting
Same as DATA PORT check (automatic)
3. Check
Make the same initial setting as DATA PORT check (automatic) and perform REMOTE and MODEL ID checks.
After that, enter the number of the test to be executed by using the keyboard of Windows PC.
In this way, the DATA PORT tests can be performed individually.
PC9500N/PC4800N
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