Yamaha P-60 Service Manual page 20

P-60/P-60S
I TEST PROGRAM
1. Preparation
• To check the unit, the following instruments and jigs are required.
Instruments: Frequency Counter
Level Meter (with JIS-C filter)
Jigs: Foot Pedal (FC-5)
MIDI cable
• Before executing the test program, set each control as follows.
Master Volume: Maximum
• Insert a plug with load of 33Ω into the [PHONES/OUTPUT] jack.
2. Entering the Test Program
Turn on the power with [C2#], [F2] and [G2#] keys pressed and held. (Fig.1)
When the test program starts to run, the sine wave of A3 sounds.
Press any key to stop the sound.
3. Test Procedure
See the Table 1 for each test item. Press the corresponding key to select and execute each test.
Table 1
No. Test Item
1 ROM Version
2 ROM Check 1
3 RAM Check 1
11 Tone Generator 1
13 Pitch
14 Output Level R
15 Output Level L
16 EQ Low
20
Key
C1-A1, Displays the version of ROM.
C2-A2 The sine wave of C4 sounds when the key corresponding to the version
is pressed and the sine wave of C2 sounds when other keys are pressed.
Where, the keys (C1-A1) correspond to integer portion (0-9) of the ver-
sion and keys (C2-A2) to decimal portion (0-9).
For example, when the version is 1.0, the sine wave of C4 sounds when
the key C1# or C2 is pressed.
C3 When the result is OK, the sine wave of C4 sounds.
When the result is NG, the sine wave of C2 sounds.
C3# When the result is OK, the sine wave of C4 sounds.
When the result is NG, the sine wave of C2 sounds.
D3 The sine wave of F3 to C6 sounds in sequence.
Confirm that no noise or abnomal sound is generated.
D3# Connect a frequency counter to the [PHONES/OUTPUT] jack and exe-
cute the test.
Confirm that the sine wave of 440±0.2Hz sounds.
E3 The sine wave of 1kHz sounds.
Confirm that each output level is as follows. (Unit: dBm)
PHONES/OUTPUT R: -2.0±2
PHONES/OUTPUT L: at least 50dBm less than R ch
F3 The sine wave of 1kHz sounds.
Confirm that each output level is as follows. (Unit: dBm)
PHONES/OUTPUT L: -2.0±2
PHONES/OUTPUT R: at least 50dBm less than L ch
F3# The sine wave of C1 sounds.
Confirm that each output level is as follows. (Unit: dBm)
PHONES/OUTPUT L, R: -1.0±2
Test Function and Judgment Creteria
(Fig. 1)