73
PSR-S750/PSR-S950
If accessing SDRAM doesn’t
start, SH7731 (IC1) may be faulty.
If accessing Program Flash
doesn’t start, SH7731 (IC1)
may be faulty.
A
Power ON
Setting CPU registers.
Initializing SH7731 port.
PSWO = H (IC26, 4)
/USB-RES =L (IC13, 18)
/SWP-IC = L (IC13, 17)
/RGB-RES = L (IC13, 16)
/DAC-IC = L (IC13, 14)
MIDI-IC = H (IC13, 13)
/NAF-WP = L (IC202, 19)
/CPU-MUTE = L (IC17, 1)
/CPU-SPOFF = L (IC17, 9)
/DA-MUTE = L (IC5, 1)
BL-ON/OFF = L (IC1, D12)
Initializing SH7731 port.
PSWO = H
/USB-RES =L
/SWP-IC = L
/RGB-RES = L
/DAC-IC = L
MIDI-IC = H
/NAF-WP = L
/CPU-MUTE = L
/CPU-SPOFF = L
/DA-MUTE = L
BL-ON/OFF = H
Resetting negation.
/USB-RES =H
/SWP-IC = H
/RGB-RES = H
/DAC-IC = H
MIDI-IC = L
/NAF-WP = H
Keyboard and
switch status taken in.
Animation starts.
Main program read from
NAND (IC202).
SSP2 internal resetting.
Canceling SSP2
internal resetting.
BL-ON/OFF = H
Initializing EBUS driver.
(EBUS Start)
EICN = H
Backup Flash transferred
ROM SDRAM
(IC23)
SSP2 PSWO = L
(IC26, 1)
Initializing EBUS driver.
/SWP-IC = H
(EBUS Start)
EICN = H (IC603, 1)
/SWP-IC = L
EICN = L
BL-ON/OFF = H
BL-ON/OFF = H
Port initial setting
/SWP-IC = H
Port initial setting
/RGB-RES = H
/USB-RES =H
Opening screen displayed.
Opening screen displayed.
Installation screen
displayed.
No
Yes
Installation mode?
(Start SW)
Media Error!
Has main program
been read successfully?
No
END
Main program not found!
Main program
should exist.
Yes
Yes
No
END
Initializing SDRAM for
BOOT, 0 clearing, setting
constant.
END
Installation
by user
Accessing Program
Flash (IC16) starts.
Error! Internal drive is
unformatted.
Mounting internal drive
should be succeeded.
Yes
No
END
Internal drive not
formatted or
connected.
Install.
Internal drive is
faulty.
No main program.
If failed to reach here, possible cause
may be in;
s3$2!-
Accessing SDRAM
(IC204, 205, 206, 207)
starts.
Communication with
EBUS starts.
Normal
starting
PSR-S950 SYSTEM BOOTING FLOWCHART
Содержание PSR-S750
Страница 41: ...41 PSR S750 PSR S950 Pattern side 2NA WZ35370 1 DM Circuit Board PSR S750 ...
Страница 43: ...43 PSR S750 PSR S950 Pattern side Scale 90 100 DM Circuit Board PSR S950 2NA WZ49340 1 ...
Страница 45: ...45 PSR S750 PSR S950 Scale 90 100 Pattern side AJACK Circuit Board 2NA WZ43510 2 ...
Страница 47: ...47 PSR S750 PSR S950 PNM Circuit Board Pattern side Scale 70 100 2NA WZ50830 1 ...
Страница 48: ...PSR S750 PSR S950 48 PNS Circuit Board Component side WR 315 1 WR 31 1 WR 310 1 2NA WZ50830 1 ...
Страница 49: ...49 PSR S750 PSR S950 Pattern side PNS Circuit Board 2NA WZ50830 1 ...
Страница 50: ...PSR S750 PSR S950 50 Component side Pattern side PNC Circuit Board WR 316 1 Scale 75 100 2NA WZ55980 ...
Страница 52: ...PSR S750 PSR S950 52 Pattern side PNR Circuit Board WR 316 1 Component side Scale 90 100 2NA WZ55980 ...