Anyone know where the sound chip is on an SE/30? I have replaced all the capacitors and still have the jailbar pattern on screen, but have read that removing and replacing the sound chip can cure the problem. Where is said chip?
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SE/30 sound chip
- Thread starter beachycove
- Start date
from the SE/30 repair on http://www.biwa.ne.jp/~shamada/fullmac/repairEng.html#SimasiMac
"(5) If solution (4) doesn't work, pull up the sound IC chip (UB11). You can see letters "SONY 0F09G 3430045B APPLE85" or "SONY 9A04 3430045B APPLE85" printed on the chip. To pull up the IC chip, connect pin 7 to pin 15 of the chip with a 1 kilo ohm resistor.
Numbering of IC Pins:
IC pins are numbered counterclockwise. Pin 1 is located at the corner marked by a small circle or dot on the chip.
(6) If solution (5) doesn't work either, replace the network filter RP2 (Bourns 4120R-601-250/201).
Also see 9. Bright Monitor with neither Arrow Pointer nor Startup
Replacement of chip type electrolytic capacitors solves the SimasiMac problem in most cases.
Even if you don't have capacitor-related troubles, it's a good idea to replace them.
C1, C3, C4, C5, C7, C8, C9, C10, C12, C13: 47µF 16V
C6: 1µF 50V"
"(5) If solution (4) doesn't work, pull up the sound IC chip (UB11). You can see letters "SONY 0F09G 3430045B APPLE85" or "SONY 9A04 3430045B APPLE85" printed on the chip. To pull up the IC chip, connect pin 7 to pin 15 of the chip with a 1 kilo ohm resistor.
Numbering of IC Pins:
IC pins are numbered counterclockwise. Pin 1 is located at the corner marked by a small circle or dot on the chip.
(6) If solution (5) doesn't work either, replace the network filter RP2 (Bourns 4120R-601-250/201).
Also see 9. Bright Monitor with neither Arrow Pointer nor Startup
Replacement of chip type electrolytic capacitors solves the SimasiMac problem in most cases.
Even if you don't have capacitor-related troubles, it's a good idea to replace them.
C1, C3, C4, C5, C7, C8, C9, C10, C12, C13: 47µF 16V
C6: 1µF 50V"
I know the source, I just can't find that chip on the logic board. Is it on another board? Or am I just blind?[/code]
