TROUBLESHOOTING GUIDE
5. NO COLOR
Check |
| Check | |
C.V.S waveform |
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| the voltage | ||
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composite video in | #44 |
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| #43 | ||
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| Video/Chroma/Deflection Vcc | |
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| Check | |
Check |
| the crystal | |
| #38 | ||
the voltage | I101 | ||
X502 | |||
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| #18 |
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RGB Vcc (9V) |
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R OUT | #19 |
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G OUT | #20 |
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B OUT | #21 |
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Check |
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R/G/B signal |
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6. NO VERTICAL DEFLECTION
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| Check |
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| the voltage |
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| #43 |
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| Video/Chroma/Deflection Vcc | Check | |
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| the voltage (25V) |
5V | I101 |
| Vertical IC Vcc (25V) | |
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| #6 |
C507 | #24 | X502 |
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C508 |
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V RAMP ALC filter |
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| I301 | |
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| C307 | |
| #23 |
| LA7841 | |
Check |
| #5 | ||
Vertical output |
| (Invert RAMP in) | ||
the voltage |
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| #3 |
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( 2.5V ) |
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| (Output) | ||
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| Check |
| Vertical |
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| vertical output signal |
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| D.Y. | Check | ||
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| the waveform | |
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| If no output, | |
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| then change I301 | |
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| 25 |
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