Yamaha Clavinova CLP-970 Service Manual page 29

19 019: TG F Chk
20 020: TG XG Chk
21 021: Pitch Chk
22 022: Output R
23 023: Output L
24 024: EQ-Low
25 025: EQ-Mid
26 026: EQ-High
27 027: D/A Noise
28 028: SW, LED Chk
29 029: All LED On
30 030: Red LED On
CLP-970/CLP-970M/CLP-970C/CLP-970A/CLP-970AM/CLP-970AC
Checks the Sound Source F (Autoscale) (SUB F).
Sequentially outputs the sine wave starting from the lower keys by switching the note
of the sound source. Checks if there is no noise or abnormal sound. When completing
the autoscaling, a note is output when a key is depressed (A certain note is output when
a respective note button is pressed).
Checks the Sound Source XG (Autoscale) (SUB XG).
Sequentially outputs the sine wave starting from the lower keys by using the sound
source of the piano. Checks if there is no noise or abnormal sound. When completing
the autoscaling, a note is output when a key is depressed (A certain note is output when
a respective note button is pressed).
Connect the frequency counter to the [PHONES] terminal.
Check that the 441.0 +/- 0.2 Hz sine wave is output.
Checks R channel output. (1 kHz)
AUX OUT L: -4 dBm
AUX OUT R: Should be lower than L channel by more than 50 dB
PHONES L: -7 dBm
PHONES R: Should be lower than L channel by more than 40 dB
Checks L channel output. (1 kHz)
AUX OUT L: Should be lower than R channel by more than 50 dB
AUX OUT L: -4 dBm
PHONES L: Should be lower than R channel by more than 40 dB
PHONES R: -7 dBm
Checks EQ-LOW frequency
Checks if the output level of the sine wave 65.4 Hz(C1) can be -15 dBm when the
wave is output at PAN = Center.
(Measuring terminal: MA120-CN5 or A-JACK-CN240)
Checks EQ-MID frequency
Checks if the output level of the sine wave 523 Hz(C4) can be -16.5 dBm when the
wave is output at PAN = Center.
(Measuring terminal: MA120-CN5 or A-JACK-CN240)
Checks EQ-HIGH frequency
Checks if the output level of the sine wave 4186 Hz(C7) can be -16.5 dBm when the
wave is output at PAN = Center.
(Measuring terminal: MA120-CN5 or A-JACK-CN240)
Checks D/A converter noise.
Play a note and check that there is no noise during the PIANO 1 release time.
(SUSTAIN ON, PAN = Center)
Checks switch and LEDs on the panel.
Play the switch which is displayed on the LED. (The order is shown in the Table 1 for
page 29.) A pre-assigned note is output when he switches pressed. (With some switchs,
the corresponding LED will light up.)
Check that all panel LEDs are lit.
Executes the test and check that all panel LEDs are lit.
Check that all panel Red LEDs are lit.
Executes the test and check that all panel Red LEDs are lit.
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