Repair Flow Chart (Continued) |
| 107T5 |
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| 77 |
| Go to cover page |
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E.CPU check list
Basic Check
31.
10,11, (Q2,Q1)
33,34,40,41 Hsync / Vsync
check cpu pin6= 5V pin9/pin8=12MhZ
pin7=gnd
H size compensation for
the load variance
check
low : 0
hi :1
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| 1 . Normal |
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| Fhout=Fhin |
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check sync. |
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| Fvout=Fvin |
Hsync_in=pin40 |
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| 2. Self test |
Vsync_in=pin41 |
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| Hout=48Khz |
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Hsync_out=pin34 |
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| Fvout=72Hz |
Vsync_out=pin33 |
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| 3.sync out of rang |
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| Fhin>72.8kHz,<28kHz |
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| Fvin>168Hz, <45Hz |
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Vblank
20 LED driver
23. Degauss
check pin 3 Normal=vblank Pulse
Blank=Hi
pin 22 OFF
check active=hi
no active=low
power saving | pin22 |
Normal | hi |
Standby | low |
Off | low |
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5, Reset |
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| check |
| check |
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| from 0V to 5V | 2801 / 3801 | ||
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