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JSD-001 motherboard
All the components listed are controlled by Syscon and connected to it by a pin/trace either directlly or indirectlly, the traces are hidden in internal layers of the motherboard
By looking at the first syscon model used by the PS3 CXR713120-201GB where we know the names of the pin signals it seems these syscon control lines for voltage regulators could be the syscon pins named SW_x or SW_x_x (switches, used as a generic name for slave components that only has 2 states)
Mitsumi 463A (STBY)
Mitsumi voltage regulator 463A
Seen on a JSD-001 motherboard
Pin # |
Name |
Description
|
1 |
5V_EVER |
Input 5v standby rail, from power supply (pin 1 of connector CN101)
|
2 |
3.3V_EVER_B |
Output 3.3v standby rail 2
|
3 |
RST/SYSCON_RST |
Goes under package to the black 100 ohm resistor at its right, and from there to syscon pin26@SW2-303
|
4 |
? |
Goes under package to squared testpad/sinkhole at its right (not connected ?)
|
5 |
VCAP |
Capacitor to ground
|
6 |
? |
To squared testpad/sinkhole at its top (not connected ?)
|
7 |
GND |
Ground
|
8 |
3.3V_EVER_A |
Output 3.3v standby rail 1
|
Mitsumi 348A (HDMI)
Mitsumi voltage regulator 348A
Seen on a JSD-001 motherboard
Pin # |
Name |
Description
|
1 |
N/C |
Not connected
|
2 |
HDMI_EN |
Connected to SW2-30x pin 119 Connected to HDMI connector pin 18 (+5V output) through a transistor
|
3 |
GND |
Ground (this pin also dissipates heat to the circuit board ground layer)
|
4 |
HDMI_VCC1 / +5V_ANA ? |
Connected to HDMI controller MN8647091 pin 100 (and a lot more pins). It have a testpad at the other board side
|
5 |
HDMI_VCC2 / +3.3V_ANA ? |
Connected to HDMI controller MN8647091 pin 25 (and a lot more pins). It have a testpad at the other board side
|
6 |
GND |
Ground (this pin also dissipates heat to the circuit board ground layer)
|
7 |
HDMI_EN |
Connected to SW2-30x pin 119 Connected to HDMI connector pin 18 (+5V output) through a transistor
|
8 |
5V_EVER |
Connected to Power Supply control connector (CN101) pin 1
|
Mitsumi 810X (RSX RAM)
Mitsumi voltage regulator 810x
Pin # |
Name |
Description
|
1 |
RSX_VDDR |
connected to a lot of pads of the RSX, it has a testpad at the other board side
|
2 |
N/C |
Not connected
|
3 |
GND |
Ground
|
4 |
NOISE_CAP |
Noise decrease pin. 0.01μF capacitor to GND, and to a tiny squared testpad
|
5 |
EN ?/Cont/Control |
Connected to syscon pin75@SW2-303
|
6 |
N/C |
Not connected
|
7 |
N/C |
Not connected
|
8 |
VIN |
connected to 2x sinkholes
|
D35653 0S25
Next to NOR, on top of the board JSD-001, responsible of the NOR VCC
Pin # |
Name |
Description
|
1 |
OUT/NOR ? |
capacitor and 180 ohm resistor to ground... then to 4 sinkholes and at the other side NOR VCC 3.3v (testpoint)
|
2 |
GND |
|
3 |
GND |
|
4 |
? |
Capacitor to ground
|
5 |
EN ? |
Connected to pin50@SW2-303. And pin 3 @ Service Connector
|
6 |
GND |
|
7 |
GND |
|
8 |
VCC ? |
To fuse/thermistor TH7601
|
BD9684 0906
Pin # |
Name |
Description
|
1 |
? |
sealed coil... then to 8 sinkholes... to BD controller, etc...
|
2 |
? |
dissapears under package
|
3 |
VCC ? |
0.400mf capacitor to ground, and to fuse/thermistor TH7601
|
4 |
EN ? |
to a sinkhole... at the other side 3.3K resistor to ground, then connected to pins 2 and 3 of a dual transistor (base of TR1, and collector of TR2) pin 5 of the dual transistor (base of TR2) is connected to a long trace that dies in a sinkhole and emerges under syscon, connected to pin42@SW2-303 the emitter pins of the dual transistor (1 and 4) are connected to a common ground
|
5 |
GND |
|
6 |
GND |
|
7 |
|
dissapears under package
|
8 |
VCC ? |
0.400mf capacitor to ground, and to fuse/thermistor TH7601
|
9 |
? |
dissapears under package
|
10 |
? |
sealed coil... then tied to pin 11
|
11 |
? |
to 6 sinkholes... at the other side to unpopulated service connector... etc...
|
12 |
? |
Capacitor to ground, to a 4x-sinkhole... then to BD controller
|
13
|
14 |
GND |
|
15 |
? |
to a sinkhole... at the other side to BD controller
|
16 |
? |
dissapears under package
|
17 |
VCC ? |
0.400mf capacitor to ground, and to fuse/thermistor TH7601
|
18 |
? |
towards blu ray laser connector
|
19 |
? |
tied to pin 1
|
20 |
? |
to a sinkhole... then to pin 6 of the same dual transistor (collector of TR1)
|
Rohm BD3525
BD3525 pinout
Pin # |
Name |
Description |
Connections
|
1 |
OUT |
Output voltage |
To 4 sinkholes... at the other side to electrolitic capacitor 2.5v 330... and to ???
|
2
|
3
|
4
|
5
|
6 |
VOS |
Output voltage control |
Shorten with OUT pins
|
7 |
FB |
Reference voltage feedback |
Diode to ground, and capacitor to ground, and diode to 55.8 ohm resistor to OUT pins
|
8 |
NRCS |
Non Rush Current on Start-up |
Capacitor to ground
|
9 |
GND |
Ground |
|
10 |
GND |
Ground |
|
11 |
VCC |
Power supply |
To fuse/thermistor TH7601
|
12 |
EN |
Enable input |
46Kohm resistor to ground, and a trace that dissapears in a sinkhole and emerges near syscon, connected to pin52@SW2-303
|
13 |
SCP |
Short Circuit Protection delay time setting |
Capacitor to ground
|
14 |
VD |
Input voltage detect |
Shorten with IN pins
|
15 |
IN |
Input voltage |
0.400mf capacitor to ground, to 4 sinkholes connected to BD3527 (near usb) pins 14 up to 20 and BD3527 (near flash) pins 14 up to 20... and to ???
|
16
|
17
|
18
|
19
|
20
|
Rohm BD3527
There are 2 BD3527 on JSD-001 motherboard, one is located near flash and the other near usb connectors
BD3527 (near flash) pinout
Pin # |
Name |
Description |
Connections
|
1 |
OUT ? |
Output voltage ? |
to 3 smd components to gnd, to electrolitic capacitor 2.5v 330, to 3 sinkholes with a testpoint at the other side
|
2
|
3
|
4
|
5
|
6 |
VOS ? |
Output voltage control ? |
Shorten with OUT pins
|
7 |
FB ? |
Reference voltage feedback ? |
Capacitor and 1600 ohm resistor to OUT pins
|
8 |
NRCS ? |
Non Rush Current on Start-up ? |
Capacitor? to ground
|
9 |
GND |
Ground |
|
10 |
GND |
Ground |
|
11 |
VCC ? |
Power supply ? |
To fuse/thermistor TH7601
|
12 |
EN ? |
Enable input ? |
dissapears in a sinkhole (resistor 23Kohm to ground in the other side) and emerges near syscon, connected to pin95@SW2-303
|
13 |
SCP ? |
Short Circuit Protection delay time setting ? |
dissapears in a sinkhole (capacitor 915nf to ground in the other side)
|
14 |
VD ? |
Input voltage detect ? |
Shorten with IN pins
|
15 |
IN ? |
Input voltage ? |
to 3 sinkholes missing at the other side, to 4 sinkholes connected to BD3525 pins 14 up to 20... and to ???
|
16
|
17
|
18
|
19
|
20
|
BD3527 (near USB) pinout
Pin # |
Name |
Description |
Connections
|
1 |
OUT ? |
Output voltage ? |
88 ohm resistor to ground, to a testpoint, to 4 sinkholes and to the other side to electrolitic capacitor 2.5v 330 (very close to a ram chip)
|
2
|
3
|
4
|
5
|
6 |
VOS ? |
Output voltage control ? |
Shorten with OUT pins
|
7 |
FB ? |
Reference voltage feedback ? |
capacitor and 1600 ohm resistor to OUT pins
|
8 |
NRCS ? |
Non Rush Current on Start-up ? |
Capacitor? to ground
|
9 |
GND |
Ground |
|
10 |
GND |
Ground |
|
11 |
VCC ? |
Power supply ? |
To fuse/thermistor TH7601
|
12 |
EN ? |
Enable input ? |
42k ohm resistor to ground, and to a sinkhole that dissapears in the other side and emerges near syscon, connected to pin92@SW2-303
|
13 |
SCP ? |
Short Circuit Protection delay time setting ? |
1000nf capacitor to ground
|
14 |
VD ? |
Input voltage detect ? |
Shorten with IN pins
|
15 |
IN ? |
Input voltage ? |
capacitor to ground, to 4 sinkholes missing in the other side, connected to BD3525 pins 14 up to 20 ... and to ???
|
16
|
17
|
18
|
19
|
20
|
Others
- RSX VDDR control in DIA-001 ---> Rohm D35231 (1,2v)?, see 1
- RSX VDDR control in DIA-002 ---> Rohm D35230 (1,0v)?, see 1