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annotate pirelli/audio @ 55:037c9bea954c

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Pirelli PCB: traced the earpiece and loudspeaker analog signals
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Fri, 02 Aug 2013 02:16:31 +0000
parents
children fdfb57a1c5fe
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
55
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1 Tracing EARN & EARP outputs from Iota. On L1 they go to vias at (2422,518) and
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
2 (2449,518). On L2 they go to vias at (2455,322) and (2492,323). Tracing made
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
3 difficult by flaws in steve-m's grind-down process, but they appear to go to L4,
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
4 where they then seem to go to other vias at (491,1254) and (490,1292). Found
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
5 them on L7: going to immediately adjacent micro-vias at (514,1255) and
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
6 (514,1295). On L8 they go to the earpiece speaker.
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
7
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
8 Tracing the loudspeaker signal path starting with the physical speaker connector
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
9 on L1. The connector part center is about (1930,212). The connector footprint
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
10 on L1 is damaged by steve-m's grind-down process (almost gone), but there seem
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
11 to be micro-vias at (1756,251) and (2005,237). On L2 they go to (1788,231) and
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
12 (2021,264). On L7 they go to micro-vias at (1784,262) and (1992,252). On L8
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
13 they go by some caps and then back to new micro-vias! The latter are at
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
14 (1902,220) and (1903,259). On L7 the grind-down damage gets in the way again,
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
15 but they appear to go to vias at (1935,218) and (1934,260). Found them on L3:
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
16 going to new vias at (3703,311) and (3739,313). (It might actually be L4.)
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
17 Found them on L7: fat traces to micro-vias at (3870,934) and (3898,869).
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
18 Finally on L8 they go to the Winbond chip! The speaker connection pins appear
037c9bea954c Pirelli PCB: traced the earpiece and loudspeaker analog signals
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
19 to be the two leftmost ones in the top row of 9 pins.