Main Cpu I/F Test; Usb Storage Test; Haad Test; Lcd Test - Yamaha M7CL-32 Service Manual

M7CL-32/M7CL-48

1-16 MAIN CPU I/F test

Contents: Checks if the connection from the MAIN → Master-
Panel CPU communication port (USB) is established.
Besides, command is sent from the MAIN →
MasterPanel CPU communication port (SIO) and
checks if received through the MasterPanel → MAIN
communication port (SIO).
If checking the circuit board, checks through the
USB memory access and loopback of SIO.
Example of executing screen
NG MAIN CPU I/F
NG SIO Loopback
NG USB I/F
AutoNext
START PAUSE CLOSE

1-17 USB STORAGE test

Contents: Checks the USB port by writing/reading the data in
the storage connected to the USB port.
Example of executing screen
NG USB STORAGE
NG USB Storage
AutoNext
START PAUSE CLOSE

1-18 HAAD test

Contents: Checks by sending command to change GAIN to
the HAAD circuit board, inputting sound for each
8ch, and D/A converting it.
Example of executing screen
NG USB STORAGE
NG CH1–8 GAIN SWITCH
NG CH9–16 GAIN SWITCH
NG CH17–24 GAIN SWITCH
NG CH25–32 GAIN SWITCH
NG CH33–40 GAIN SWITCH
NG CH41–48 GAIN SWITCH
NG STIN1–4 GAIN SWITCH
NG CH1–8 PHANTOM
NG CH9–16 PHANTOM
NG CH17–24 PHANTOM
NG CH25–32 PHANTOM
NG CH33–40 PHANTOM
NG CH41–48 PHANTOM
NG STIN1–4 PHANTOM
AutoNext
START PAUSE CLOSE
On the M7CL-32, CH33–40 and CH41–48 are grayed out.
134
If the check result is NG
NG:
OkData TxData
If the check result is NG
NG:
OkData TxData
If the check result is NG
NG:
OkDate TxDate

1-19 LCD test

Contents: LCD Display Test.
Eight patterns from "1)" to "8)" shown below will
be shown on the LCD at 5 second intervals. Visually
check them. Touching Touch Panel clears the timer.
Keep touching Touch Panel to continue the visual
check while holding the screen. When the visual
check is over, select [OK] or [NG] in the result dialog
of the test program.
Example of executing screen
NG LCD
NG LCD
AutoNext
START PAUSE CLOSE
Input the result of the check with this dialog.
LCD CHECK
OK
1) H character display
Used to check vertical and horizontal distortion and whether
or not Hs are clearly seen in the frame.
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
2) Color bleeding and unstable display
As "O"s are displayed at both sides and "X"s in-between, check
that characters are stable, "O"s are in place and the color is free
from bleeding. The characters and background are displayed
with white, black and gray colors with slight variation.
O X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O
O X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O
O X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O
O X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O
O X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O
O X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O
O X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O
O X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O
O X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O
O X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O
O X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O
O X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O
O X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X O
OkData TxData
NG