Roland VS-1680 Service Notes page 8

VS-1680
[F6:LCD check2] Display all ASCII character codes one by
one on the LCD.
[02:LED check]
This is a test for the LED in order to find any defect such as LED
lighting problems,short circuit, wrong connections, or etc.
[F3:LED Scan] Turn on and off LED one by one.
[F4:LED Blink] Flash all LED simultaneously.
[F5:LED All On] Turn all LED simultaneously.
[F6:LED ManuScan] Turn on LED one by one as [FF] or
[REW] button is pressed or TIME/VALUE
Dial is turned.
[03:SW check]
Check the SW contact fault or other problems and confirm SW
functions on Panel board.
[F3:SW] Except power switch press all switches
on the panel one by one.
The LEDs will flash and warn of error
when more than two Switches are
pressed at the same time during the test.
To finish this test turn TIME/VALUE dial.
"Err" message and the number of
switches which not tested yet will be
appeared on the display at the end of
the test.
(If there is any untested switch is
remained.)
When all switches are tested completely,
"OK" message is appeared on the
display and finish the test.
[04:Fader check]
Check the Fader and the capacity of back up battery on Panel
board.
[xx:Fader Check] Check the Faders.
The LCD draws bar graphs representing
settings of the faders.
Each channel LED lights green when the
fader is at the bottom,red at the top
position (127) and orange at the middle
of the stroke (64).
In the test, confirm the bottom and top
position.
[xx:Battery Check] Battery voltage and OK/NG are shown
on the display.
[05:FootSW check]
Check the status of foot switch function.
[xx:FootSW Check] Check the foot switch.
Plug the foot switch in FOOT SWITCH
socket.
The LCD indicates each status when
switch is turned on and off and confirm
the LCD correspond it correctly.
[06:Encoder check]
Check the status of Encoder function.
[xx:Encoder Check] Check the encoder function.
The display shows the numbers that
increase or decrease depending on the
TIME/VALUE dial turning direction.
Confirm increase or decrease numbers
correspond to the dial direction.
Turn TIME/VALUE dial clockwise:
increase the numbers.
Turn TIME/VALUE dial counterclockwise:
decrease the numbers.
The numbers are indicated -25 to 25
extreme.
8
[07:MIDI check]
Check the status of MIDI IN/OUT/THRU function.
[F3:MIDI IN/OUT] Feed MIDI signal to MIDI IN.
The display indicate the data which input
into MIDI IN and output the data from
MIDI OUT.
Confirm the data which output from MIDI
OUT is as same as the input data.
[F4:MIDI THRU] Feed MIDI signal to MIDI IN.
The display indicate the data which input
into MIDI IN and output the data from
MIDI OUT by hardware through from
MIDI IN.
Confirm the data which output from MIDI
OUT is as same as the input data.
[08:A/D D/A check]
Test A/D and D/A in order to find wrong connection or etc.
[F3:FS Select] 48,44.1,32KHz
Select the sampling rate at A/D and D/A
stages
[F4:Peak ModeSel] Clip(0dB), Peak(-3dB), Sence(-20dB),
0(---dB)
Set the LED lighting conditions at the
peak point.
[F5:R-DAC Mode] MASTER, MT-PRO, MT-1, MT-2, Liv1,
Liv2
R-DAC processed sound is output to all
OUT.
[F6:MUTE] Off, ON
Mute all of output signals.
Analogue input 1-8 send signals to analogue output 1-8
respectively.
The signals from analogue input 7 and 8 are also sent to
DIGITAL OUT.
[09:Digital IN check]
Test Digital IN in order to find wrong connection or etc.
[F3:Input Sel] 1ch(Cx), 2ch(Op)
Select the output of Cox and Opt.
[[F5:R-DAC Mode] MASTER, MT-PRO, MT-1, MT-2, Liv1,
Liv2
R-DAC processed sound is output to all
OUT
Test DIGITAL IN.
Connect DIGITAL IN socket to DIGITAL OUT of your CD player
or etc. and play song.
When the signal is received correctly and locked, the display will
show "Lock" message, current FS, Emphasis(EMP), Copy
graph(CPY) and Category(xxH). If the signal isn't received
correctly and unlocked,"Unlock" message will be appeared on
the display.
The input signals from DIGITAL IN are sent to all of analogue
output and also sent to DIGITAL OUT with the same flags (FS,
CPY, EMP) as they received.
[10:Digital OUT check]
Test Digital OUT in order to find wrong connection or etc.
[F3:FS Select] 48,44.1,32KHz
Select the sampling rate at Digital OUT.
Sep, 1998