Editing N900 Hardware Schematic

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An [[Nokia N900|N900]] schematic appears to be at [http://mohammadag.xceleo.org/public/.private/Nokia_N900_RX-51_Schematics.pdf] and now on [http://www.google.de/search?q=nokia+n900+rx-51+schematics.pdf&oq=Nokia_N900_RX-51_schematics].
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An [[Nokia N900|N900]] schematic appears to be at [http://mohammadag.xceleo.org/public/.private/Nokia_N900_RX-51_Schematics.pdf].
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Service Manuals L1_2 and L3_4 can be found under e.g. http://www.google.de/search?q=Nokia_N900_RX-51_Service_Manual_L1L2_v1_0.pdf
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This might not be the exact version of the schematic used to make the phone.
This might not be the exact version of the schematic used to make the phone.
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* N6543 - 2.8 V regulator with enable, provides power to:
* N6543 - 2.8 V regulator with enable, provides power to:
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* G6450 - 38.4 MHz VCTCXO - clock for Bluetooth and WLAN modules automatically enabled when either require clock, through D6450 OR gate to above regulator.
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* G6450 - 38.4 MHz VCTCXO - clock for Bluetooth and WLAN modules automatically enabled when either require clock, through or gate to above regulator.
* N6300 - WLAN module
* N6300 - WLAN module
* N6000 - BT module / FM receiver - [[N900 FM radio receiver]]
* N6000 - BT module / FM receiver - [[N900 FM radio receiver]]
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Erratum:
 
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WLAN_BT(3:0)
 
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line_3 N6300 WLAN module : BT_FREQ goes to nirvana
 
==Page 10 GPS==
==Page 10 GPS==
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==Page 11 RAPUYAMA, GAZOO==
==Page 11 RAPUYAMA, GAZOO==
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* N2200 - Gazoo (modem companion chip similar to GAIA)
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* N2200 - Gazoo
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* D2800 - Rapuyama -  Nokia BB5 Modem
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* D2800 - Rapuyama
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* D3000 - 128 Mbit NOR flash + 128 Mbit DDR RAM - connected only to Rapuyama
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* D3000 - 128 M NOR flash + 128 M DDR - connected only to Rapuyama
==Page 12 Display flex connector==
==Page 12 Display flex connector==
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* N1530 - Ambient light sensor
* N1530 - Ambient light sensor
* N1550 - CMOS camera module
* N1550 - CMOS camera module
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* V1540 - RGB indicator LED
 
Erratum:
Erratum:
  I2C_3(1:0)
  I2C_3(1:0)
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==Page 13 RF Part==
==Page 13 RF Part==
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Cellphone components RF block
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* N7560 - Aura DC/DC converter for power supply
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* Aura - Vapaus, ... Cellphone components.
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* N7500 - Vapaus RX I/Q sampling, TX encoder, connected to RAPUYAMA. Provides reference clock to GPS
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* N7540 - WCDMA Power amplifier TX
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==Page 14 Signal Overview (Top)==
==Page 14 Signal Overview (Top)==
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==Note on component types and values==
==Note on component types and values==
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The schematics only use symbolic labels for most components, and abstract names made up by Nokia for some of the large chips (e.g. GAYA, RAPUYAMA). However at least most resistors and capacitors have their size printed next to them. So the simpler the component, the harder it gets to tell what it actually is - except for capacitors and resistors. For a lot of chips you can read the actual printing from body of component, by looking at the photos p. 14, 15 and at [http://maemo.cloud-7.de/Gallery-N900-exploded/ Joerg Reisenweber's highres scans] <ref name="high resolution scans"/>.
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The schematics only use symbolic labels for most components, and abstract names made up by Nokia for some of the large chips (e.g. GAYA, RAPUYAMA). However at least most resistors and capacitors have their size printed next to them. So the simpler the component, the harder it gets to tell what it actually is - except for capacitors and resistors. For a lot of chips you can read the actual printing from body of component, by looking at the photos p. 14, 15 and at [http://maemo.cloud-7.de/Gallery-N900-exploded Joerg Reisenweber's highres scans] <ref name="high resolution scans"/>.
This webpage<ref name="teardown BOM">http://www2.electronicproducts.com/Nokia_N900_Mobile_Phone-whatsinside_text-90.aspx</ref> has a pretty decent list of components from a reverse engineering teardown effort by isuppli.com. Almost a BOM, if only they had added the symbolic labels or exact component locations to link back to the schematics. Comes even with links to datasheets, physical dimensions of component, etc pp.
This webpage<ref name="teardown BOM">http://www2.electronicproducts.com/Nokia_N900_Mobile_Phone-whatsinside_text-90.aspx</ref> has a pretty decent list of components from a reverse engineering teardown effort by isuppli.com. Almost a BOM, if only they had added the symbolic labels or exact component locations to link back to the schematics. Comes even with links to datasheets, physical dimensions of component, etc pp.

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