Ram Battery Test; Lcd All On / Off Test; Led On / Off Test - Yamaha RM1x Service Manual

Test End
After displaying the test result and the test will
be finished.
All the RAM data will be restored.
Press the [F4] switch to exit the test, press the
[+1] switch to proceed with the next test and
then the [ENTER] switch to execute the next
test.
C-2 RAM BATTERY TEST
02: RAM Battery
This test checks that the voltage of the RAM
backup battery is greater than 2.9V and less
than 3.5V at the A / D input terminal of CPU.
The " OK " will be displayed when the voltage
is within the range.
Display Of Test Results
02: RAM Battery
OK
3.2V
NG
02: RAM Battery
#.#V Low
02: RAM Battery
#.#V High
Test End
Displays the test result and ends the test.
Press the [+1] switch to proceed with the next
test and then the [ENTER] switch to execute
the next test.
Notes)
OK
NG
NG
RM1x
LCD
(Fig. 1 )
mark is red LED, mark is green LED,
C-3 LCD ALL ON / OFF TEST
03: LCD Check
Confirm that all LCD dots blink. Each line should
blink in one (1) second intervals.
Confirm that the LCD dots light normally.
Confirm that the LCD contrast changes when
rotating the contrast adjustment volume.
Display Of Test Results
Not appearing
Test End
Press the [F4] switch to end the test.
Press the [+1] switch to proceed with the next
test and then the [ENTER] switch to execute
the next test.
C-4 LED ON / OFF TEST
04: LED Check
Confirm that LED lights on and off sequentially
from the left of Fig. 1 and all LED ' s light on
and off at the same time.
The above-mentioned procedure are repeated
until being interrupted.
Display Of Test Results
Not appearing
Test End
Press the [F4] switch to ends the test.
Press the [+1] switch to proceed with the next
test and then the [ENTER] switch to execute
the next test.
mark is 7- Seg. LED
RM1x
27