Polaroid 8035 Repair Manual page 97

8K Series ProPalette Repair Manual
Horizontal channel test (ht)
This test consists of three sub-tests
1. Horizontal DAC test
2. Horizontal size trimdac test
3. Horizontal center trimdac test
The sub-tests are run sequentially, the Pass/Fail results are printed to the screen and the
main menu is displayed.
Vertical channel test (vt)
This test consists of three subtests
1. Vertical DAC test
2. Vertical size trimdac test
3. Vertical center trimdac test
The sub-tests are run sequentially, the Pass/Fail results are printed to the screen and the
main menu is displayed.
Video channel test (vdt)
This test consists of two subtests
1. Video DAC test
2. COS
The sub-tests are run sequentially, the Pass/Fail results are printed to the screen and the
main menu is displayed.
Luma trimdac test (lt)
There are two luma trimdacs, hi_luma and lo_luma. The output of these two trimdacs is
added to create the input to the luma amplifier. The tests are run sequentially, the
Pass/Fail results are printed to the screen and the main menu is displayed.
Autoluma test (at)
The autoluma test consists of two parts, testing the autoluma offset , and testing the
autoluma multiplier. This test requires a -0.800 Vdc input, applied to TP 16 or J35 pin 2
referenced to TP 41. The tests are run sequentially, the Pass/Fail results are printed to the
screen and the main menu is displayed.
Note: Failure to use the -0.800 Vdc bias voltage will result in the
false reporting of a Luma test error.
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DAC test
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Troubleshooting and Diagnostics