Yamaha P 85 Service Manual

							31 P-85/P-85S
C0 D0C
#0D#0
E0 F0 G0 A0F#0G#0A#0
B0 C1 D1C#1D#1
E1 F1 G1 A1F#1G#1A#1
B1 C2 D2C#2D#2
E2 F2 G2 A2F#2G#2A#2
B2 C3 D3C#3D#3
E3 F3 G3 A3F#3G#3A#3
B3 C4 D4C#4D#4
E4 F4 G4 A4F#4G#4A#4
B4C5 D5C#5D#5
E5 F5 G5 A5F#5G#5A#5
B5 C6 D6C#6D#6
E6 F6 G6 A6F#6G#6A#6
B6 C7
B-1 A-1A#-1
12
34
5910
1112
1314
1517
1826 00 41 43
27 28 31 42 45 47 16
Test No.
8 4
Fig. 1
C#2F2
G#2
Fig. 2
 TEST  PROGRAM
1 Preparation
  Use an AC adaptor PA-5D or PA-150.
  Following items are required for testing. (Input impedance of measuring instrument is more than 1 MΩ)
  • Level meter (with JIS-C Filter)
  • Frequency counter, which can detect thousandth value or more.
  • MIDI cable
  • Foot pedal (FC3), Foot switch (FC4 or FC5)
  Set the [MASTER VOLUME] to the maximum level and leave the pedals turned off.
  Connect a measuring plug (stereo plug) to the [PHONES] jack. (33 Ω load)
2  To enter Test Program
  Turn on the power with [C#2], [F2] and [G#2] keys pressed and held simultaneously. (Fig. 1)
  Once the Test Program is started properly, the sine wave of A3 sounds. To stop the sound, press any key.
3  To proceed the test
  Test items are listed in Table 1.
  Press the corresponding key to select and execute each test. (See Fig. 2)
  To enter the test item select mode after completing each test item, press the [DEMO/SONG] button or the lowest key.
4 Test result
  Each test result is indicated by the sound.
  When the test result is OK, the sine wave of C4 sounds.
  When the test result is NG, the sine wave of C2 sounds. 
						

							P-85/P-85S
32
No. Key Test item Test function and judgment criteria
1 C3 ROM version checkTo check the Master ROM version using C0 – A2 keys.
To check the Slave ROM version using C3 – A5 keys.
Press keys in the specifi ed range and fi nd the key where the sine wave sounds. Check the 
version by the scale of that key. (See Fig. 3)
Press keys C0 – A0 to check the integer of the Master ROM version.
Press keys C1 – A1 to check the fi rst decimal place of the Master ROM version.
Press keys C2 – A2 to check the second decimal place of the Master ROM version.
Press keys C3 – A3 to check the integer of the Slave ROM version.
Press keys C4 – A4 to check the fi rst decimal place of the Slave ROM version.
Press keys C5 – A5 to check the second decimal place of the Slave ROM version.
When the number corresponding to the pressed key is coincident with the current version, an 
OK (sine wave of C4) sound is generated and when it is not coincident, an NG (sine wave of 
C2) sound is generated.
For the Key-to-number correspondence, refer to Fig. 3.
Example) When the current version is Ver.1.00
When the C#0 key is pressed. the sine wave of C4 sounds, indicating 1 for the integer.
When the C1 key is pressed, the sine wave of C4 sounds, indicating 0 for the first 
decimal place.
When the C2 key is pressed, the sine wave of C4 sounds, indicating 0 for the second 
decimal place.
In this way, the version 1.00 is confi rmed.
(The sine wave of C2 sounds when any key other than C#0, C1 and C2 is pressed.)
C0 D0C
#0D#0
E0 F0 G0 A0F#0G#0A#0
B0 C1 D1C#1D#1
E1 F1 G1 A1F#1G#1A#1
B1 C2 D2C#2D#2
E2 F2 G2 A2F#2G#2A#2
B2 C3 D3C#3D#3
E3 F3 G3 A3F#3G#3A#3
B3 C4 D4C#4D#4
E4 F4 G4 A4F#4G#4A#4
B4C5 D5C#5D#5
E5 F5 G5 A5F#5G#5A#5
B5 C6 D6C#6D#6
E6 F6 G6 A6F#6G#6A#6
B6 C7
B-1 A-1A#-1
01
23
456
78
9
Integer of the
Master ROM version
01
23
456
78
9
First decimal place 
of the Master 
ROM version
01
23
456
78
9
Second decimal place 
of the Master 
ROM versionInteger of the
Slave ROM versionFirst decimal place 
of the Slave 
ROM versionSecond decimal place 
of the Slave 
ROM version
01
23
456
78
901
23
456
78
901
23
456
78
9
2 C#3 Master ROM check 1To check the ROM checksum connected to the CPU bus (Simplifi ed check)
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
3 D3 Slave ROM check 1To check the ROM checksum connected to the CPU bus (Simplifi ed check)
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
4 D#3 RAM check 1To check the connection condition of RAM connected to the CPU bus (Simplifi ed check)
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
5 E3 Flash ROM check 1To check erase, write, read functions for specifi c bank of Flash ROM (Simplifi ed check)
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
It takes 6 seconds before checking is completed.
9 F3 TG1 check
(Auto Scaling)The sine wave sounds from the low range in the key range (A0 – E3) capable of sounding 
while the sound production channel of the sound source is changed one after another.
(The sound stops after sounding of all 32 channels.)
Check that no abnormal sound or noise is generated.
When a key is pressed after Auto Scaling, the sine wave sounds. (Single sound, priority on 
fi rst-come)
Press the [DEMO/SONG] button to end this test.
Table 1    Test items
Fig. 3 
						

							33 P-85/P-85S
No. Key Test item Test function and judgment criteria
10 F#3 TG2 check
(Auto Scaling)The sine wave sounds from the low range in the key range (F3 – C6) capable of sounding 
while the sound production channel of the sound source is changed one after another.
(The sound stops after sounding of all 32 channels.)
Check that no abnormal sound or noise is generated.
When a key is pressed after Auto Scaling, the sine wave sounds. (Single sound, priority on 
fi rst-come)
Press the [DEMO/SONG] button to end this test.
11 G3 Pitch checkCheck that the sine wave of 439.92 Hz ± 0.22 Hz sounds at the level of specifi cation  (DAC 
input full bit -12 dB). (PAN = Center)
Connect the frequency counter to the [PHONES] jack for measurement.
When the test item is ended with the [DEMO/SONG] button, the sound stops.
12 G#3 Output Level R checkCheck that the sine wave of 1 kHz sounds at the level specifi ed below (DAC input full bit 
-12dB). (PAN = R)
Connect a level meter (with JIS-C Filter) to the [PHONES] jack for measurement.
PHONES L: -50 dBu or less  PHONES R: -1.0 dBu ± 2 dB
When the test item is ended with the [DEMO/SONG] button, the sound stops.
13 A3 Output Level L checkCheck that the sine wave of 1 kHz sounds at the level specifi ed below (DAC input full bit 
-12 dB). (PAN = L)
Connect a level meter (with JIS-C Filter) to the [PHONES] jack for measurement.
PHONES L: -1.0 dBu ± 2 dB  PHONES R: -50 dBu or less
When the test item is ended with the [DEMO/SONG] button, the sound stops.
14 A#3
&2-08
GSFRVFODZ
DIFDL
15 B3
&2.*%
GSFRVFODZ
DIFDL  For factory inspection only.
16 C4
&2)*()
GSFRVFODZ
DIFDL
17 C#4 SW checkPress switches one at a time in the order as in Table 2 (p.34). The sine wave sounds at the 
scale corresponding to each switch being pressed (Refer to Table 2 in p.34.). Also, when 
there is an LED corresponding to that switch, the LED lights up while the switch is pressed.
Check that all switches are pressed correctly, resulting in OK.
Pressing a switch other than specifi ed ones results in NG.
When the pressed switch is not detected even though it is actually pressed, no sound is pro-
duced and the test results in NG.
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
18 D4 Lighting of all panel LEDsAll LEDs should light up.
When the test item is ended with the [DEMO/SONG] button, the LEDs will turn off.
26 D#4 Pedal 1 check
(Soft pedal)Connect the pedal unit to the [PEDAL UNIT] jack.
The sine wave of C3 sounds when the test is started and the sine wave of C4 sounds when 
the pedal is depressed.
When the pedal is released, the sound of the C4 sine wave stops and the test result is OK.
For the NG test result, the sine wave sounds (continuously until any key is pressed).
27 E4 Pedal 2 check
(Sostenuto pedal)Connect the pedal unit to the [PEDAL UNIT] jack.
The sine wave of C3 sounds when the test is started and the sine wave of C4 sounds when 
the pedal is depressed.
When the pedal is released, the sounding of the C4 sine wave stops and the test result is OK.
For the NG test result, the sine wave sounds (continuously until any key is pressed).
28 F4 Pedal 3 check
(Damper pedal)Connect the pedal unit to the [PEDAL UNIT] jack.
The sine wave of C3 sounds when the test is started. The sine wave of G4 sounds when 
the pedal is depressed from the OFF position to the half position , and the sine wave of C4 
sounds when the pedal is depressed from the half position to the ON position. When the 
pedal is released, the sound of the C4 sine wave stops and the test result is OK.
For the NG test result, the sine wave sounds (continuously until any key is pressed).
29 F#4 Sustain pedal checkConnect a foot pedal (FC3) or footswitch (FC4 or FC5) to the [SUSTAIN] jack.
The sine wave of C3 sounds when the test is started and the sine wave of C4 sounds when 
the pedal is depressed.
When the pedal is released, the sound of the C4 sine wave stops and the test result is OK.
For the NG test result, the sine wave sounds (continuously until any key is pressed). 
						

							P-85/P-85S
34
No. Key Test item Test function and judgment criteria
31 G4 MIDI checkConnect the [MIDI IN] jack and [MIDI OUT] jack with the MIDI cable and execute the test.
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
41 G#4 Master ROM check 2To check the ROM checksum connected to the CPU bus (Full address)
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
It takes 12 seconds before checking is completed.
42 A4 Slave ROM check 2To check the ROM checksum connected to the CPU bus (Full address)
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
It takes 12 seconds before checking is completed.
43 A#4 RAM check 2To check RAM connected to the CPU bus (Full address)
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
It takes 2 seconds before checking is completed.
As execution of this test causes the entire data on RAM to be rewritten, it is necessary to ex-
ecute initialization after this test.
45 B4 Flash ROM check 2To check erase, write, read functions for all banks of Flash ROM
* Note that execution of this test causes all data in Flash ROM to be erased.
  (a) Erase function check
    Perform the erasing procedure to the entire Flash ROM and check if it is successful.
  (b) Write function check
    To check the full address checksum of Flash ROM
    * Be careful not to turn off the power during the write function check.
 (c) Final erasure
    To erase the data written during (b) Write function check.
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
It takes 27 seconds before checking is completed.
47 C5 Factory SetTo initialize all the backup areas to restore factory default. (RAM and Flash)
* Note that all the data will be erased.
For the OK result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
It takes 7 seconds before the execution is completed.
* After executing this factory setting, be sure to execute test No. 48 “Test Exit”. Initialization of 
the memory is actually executed when the program is restarted (REBOOT). The REC and 
PLAY LEDs will begin to fl ash after the restart. Do not turn off the power until LED fl ashing 
comes to an end.
  It takes 20 seconds before LED fl ashing comes to an end.
48 C7
Test Mode ExitTo end the test program and reset to the normal mode (for restarting).
Table 2    Switch test order
Order Switch name Note No.
1 DEMO/SONG C3
2
  SELECT D3
3 SELECT  
E3
4 METRONOME F3
5 REC G3
6 PLAY A3
7 GRAND PIANO 1 B3
8 GRAND PIANO 2 C4Order Switch name Note No.
9 E. PIANO 1 D4
10 E. PIANO 2 E4
11 C. ORGAN 1 F4
12 C. ORGAN 2 G4
13 STRINGS A4
14 HARPSICHORD 1 B4
15 HARPSICHORD 2 C5
16 VIBRAPHONE D5 
						

							35 P-85/P-85S

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							39 P-85/P-85S
PREPARATION
  PC (Personal Computer)
 UX16
  MIDI - USB Driver
 *1
  Musicsoft Downloarder (MSD) *1
  *1: Obtain these programs from Yamaha offi cial website.
   (URL>>http://www.yamahapkclub.com)
      Install these software in PC beforehand.
 
P-85/P-85SComputer USB terminal
UX16
(optional) MIDI [OUT]
terminal MIDI [IN] 
terminal
BACKUP PROCEDURE
  1. Turn off the power of P-85 (P-85S).
  2. Close all the application software.
  3. Connect music instrument to the PC with the UX16.
  4. Turn on the power of P-85 (P-85S).
  5. Click the Control Panel on PC.
  Set it clicking 
as shown in the fi gure below.
CHECK off
 DATA BACKUP 
						

							P-85/P-85S
40
Display the following when click Electronic Musical Instruments
(The music data is stored)
(The panel setting and recorded user songs are stored)
* Refer to Page 42  when the following display appears.
Start up Musicsoft Downloader.