Yamaha PSR-E343, Руководство по обслуживанию

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PSR-E343/PSR-E344/YPT-340
TEST
No.
LCD display
Test descriptions, judging conditions, etc.
5
005: FRomChk1
Checks the FROM connected to the CPU bus (simpli fi ed check).
Make sure that “ FRom OK ” is displayed on the LCD.
9
009: Pit Chk
Checks pitch accuracy.
Connect the frequency counter to the [PHONES/OUTPUT] jack. (Either L or R)
Make sure that the correct signal is output. (441.0 Hz ± 0.2 Hz)
Amount of volume decay
Connect the level meter (with JIS-C
fi lter) to the L/R of the [PHONES/OUTPUT] jack. (33 Ω load)
Turn the [MASTER VOLUME] to the minimum and measure the amount of volume decay.
· PHONES L, R: -70 dBu or less
11
011: Output R
Connect the level meter (with JIS-C fi lter) to the L/R of the [PHONES/OUTPUT] jack.
(33 Ω load)
Set the [MASTER VOLUME] to the maximum level and check the output level.
· PHONES R: –2.0 dBu ± 2 dB
· PHONES L: –45.0 dBu or less
12
012: Output L
Connect the level meter (with JIS-C fi lter) to the L/R of the [PHONES/OUTPUT] jack.
(33 Ω load)
Set the [MASTER VOLUME] to the maximum level and check the output level.
· PHONES L: –2.0 dBu ± 2 dB
· PHONES R: –45.0 dBu or less
21
021: AUX Chk
Checks the [AUX-IN] terminal.
Con
fi rm that “ AUX In ” is displayed when any plug is not inserted into the [AUX-IN] terminal.
Con fi rm that “
AUX Out
” is displayed when a plug is inserted into the [AUX-IN] terminal.
(10kohms load.)
Input a sine wave (1kHz, -24dBu) into R ch of [AUX IN] terminal. (Do not input any signal into
the L ch of [AUX IN] terminal.) Con
fi rm that the output level at each terminal is as follows.
PHONES R: -2.0 dBu ± 2 dB
PHONES L: -55.0 dBu or less
Also, con
fi rm that the output level at each terminal is reversed when L and R ch are reversely
inputted.
When the plug is disconnected from the [AUX IN] terminal, “
AUX End ” is displayed on the
LCD.
23
023: SW Chk
Checks the switches on the panel. Press the switches as shown in the LCD. When a switch is
pressed, a sound is played at the prescribed pitch. (Refer to the Switch test item list on the next
page.)
Make sure that “
SW OK ” is displayed on the LCD when all the switches are pressed as indicated.
If more than two switches are pressed at a time,
“
Over Two
”
is displayed.
To cancel the running test, press the [DEMO] button or the lowest key (white key C1) to
return to the item selection display.
30
030: LCD On
Make sure that all the dots on the LCD are turned on.
31
031: LCD Off
Make sure that all the dots on the LCD are turned off.
35
035: PD1 Chk
Before power switch ON, Connect a footswitch (FC-4 or FC-5) to the [SUSTAIN] jack.
Check that C3 sound is played when the [Start/Stop] button is pressed with the pedal released and
that C4 sound is played when the pedal is depressed. Released the pedal again and the sound
will be stopped.
Make sure that “
PD1 OK ” is displayed on the LCD.
41
041: MIDI Chk
Connect the PC with a USB-MIDI driver installed and the [USB TO HOST] terminal using a
USB cable, and execute the test.
(As for the PC, install a USB-MIDI driver in the PC and
fi nish the THROUGH setup, in
advance.)
Con
fi rm that the C4 sound is played and the LCD displays “ MIDI OK ”.
45
045: Volt Chk
Insert the plug of the AC adapter into a DC-IN 12V jack.
Make sure that “
Volt OK
” is displayed on the LCD.
55
055: Rom Chk2
Checks the ROM connected to the CPU bus. (Full address)
Make sure that “
Rom OK ” is displayed on the LCD.
It will take about 25 seconds for the check.
56
056: Ram Chk2
Checks the RAM connected to the CPU bus. (Full address)
Make sure that “
Ram OK ” is displayed on the LCD.