TROUBLESHOOTING GUIDE
3. NO SOUND
Check audio output signal of I101 #1
NG : Go to the figure e
OK : Go to the figure f
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33V | 5V |
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U102 | IF OUT | SF101 |
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TUNER |
| SAW FILTER |
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#29 | #30 |
| #5 | #6 |
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| IF AGC voltage | |||||
| #14 | AFT | #10 |
| #3 |
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I701 |
| #8 |
| #52 | Check | |
Check |
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| SIF output signal | |||
MICOM |
| I101 | #54 |
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| IF Vcc (5V) |
| If no signal, | ||
| #27 |
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| SDA | #11 |
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| then change I101 | |
| #28 | SCL |
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#10 | #11 #12 | #12 |
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XC701 |
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| SIF input signal | |
32.768KHz | Check |
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| #9 |
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| clock/data signal |
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| 5V |
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| 5V |
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Check |
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| FM filter circuit |
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the crystal |
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f |
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Check |
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Vcc of the sound AMP |
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| audio signal out |
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SOUND | R601 |
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12V | #1 |
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C602 | #2 |
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| C605 |
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Audio in | #4 | I601 |
| speaker | Check |
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| C603 | TDA7267A |
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| L:Mute / H:Normal | |
Check |
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#3 |
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| Micom #40 | |||
audio signal in |
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| C604 |
| Audio MUTE | |
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| H:Mute | L:Normal | |
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| Q601 | ||
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| 23 |
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