Yamaha Tyros 1 Service Manual

							61 Tyros / TRS-MS01
INPUT VOLUME MASTER VOLUMEto LCR-CN7 to MICVRSUB-CN7
to MICVR-CN4
to AJACK-CN5
 MICVR Circuit Board
 MICVRSUB Circuit Board
Component Side
Component Side
Pattern SidePattern Side
Note: See parts list for details of circuit board component parts.
MICVR: 2NA-V881090
MICVRSUB: 2NA-V895040 
						

							62Tyros / TRS-MS01
WH
BEWH: U, C
BE: A, B, G BL: U, C
BR: A, B, G
I
I’AC CORD
to MAIN(C)-W18A to MAIN(C)-W19A
 MAIN(A) Circuit Board
Pattern Side

 CIRCUIT BOARDS (TRS-MS01) 
						

							63 Tyros / TRS-MS01
I
I’
L
R
TO KEYBOARD to MAIN(B)-W4
 MAIN(A) Circuit Board
Pattern Side
Note: See parts list for details of circuit board component parts. 
						

							64Tyros / TRS-MS01
BASS
to MAIN(A)-CB4
POWER
WH
BE
to MAIN(A)-W18B to MAIN(A)-W19B
+—+—
2.2
SPEAKER
(MIDRANGE)SPEAKER
(TWEETER) to KEYBOARD
 MAIN(S) Circuit Board
 MAIN(B) Circuit Board MAIN(C) Circuit Board
Pattern Side Pattern Side
Pattern Side
Note: See parts list for details of circuit board component parts. 
						

							Tyros / TRS-MS01
65
 TEST PROGRAM
1. Preparation
To check the product, following measuring instruments and jigs are required.
Measuring Instruments: Frequency Conter, Level Meter (with JIS-C filter), Oscillator
Except as otherwise requires, use a stereo plug with a load of
33Ω and measure at the [PHONES] jack.
Jigs: Foot Volume (FC-7), MIDI cable, Floppy Disk (2HD and
2DD), Microphone, Computer, USB cable, TV (Monitor)
2. How to Enter the Test Program
Turn the power on with [C#2], [F2] and [G#2] keys pressed and held. (Fig.1)
3. Test Procedure
1) When the test program starts to run, the LCD shows TEST.
2) Press the [TEMPO -] button or the [TEMPO +] button to select test item.
3) Press the [STYLE START/STOP] button to execute the current test item.
If the test result is OK, press the [STYLE START/STOP] button or the leftmost key to return to the wait state.
If the test result is NG, press the leftmost key to return to the wait state.
4. Test Items
No. LCD Test Function and Judgment Criteria
1 001: VersionDisplays the version of each ROM.
ROM versionsare displayed alternately on the LCD
3 003: ROM Check1Checks all ROMs connected to the CPU bus.
Confirm that the LCD shows ROM Check1 OK.
4 004: RAM Check1Checks all RAMs connected to the CPU bus.
Confirm that the LCD shows RAM Check1 OK.
5 005: Flash Check1Checks all flash memories connected to the CPU bus.
Confirm that the LCD shows Flash Check1 OK.
6 006: 
Wave ROM Check1Checks all wave ROMs.
Confirm that the LCD shows Wave ROM Check OK.
9 009: FDD CheckChecks the floppy disk drive.
Insert a disk to the drive and execute the test. Check both of 2HD and 2DD type disks.
If the test result is OK, the LCD shows FDD Check OK.
If errors occur, the following messages are indicated on the LCD.
1) FDD Check NG (when the test result is NG.)
2) NO FD (when no disk is detected in the drive.)
3) PROTECT FD (when the disk is write-protected.)
4) UNFORMAT FD (when the disk is not formatted.)
10 010: HDD Chk(IDE)Checks the hard disk.
If the test result is OK, the LCD shows HDD (IDE) OK.
If errors occur, the following messages are indicated on the LCD.
1) HDD (IDE) NG (when the test result is NG.)
2) NO HDD (when no hard disk is detected.)
*Format a harddisk drive with it installed on the Tyros.
*Perform the HDD check more than 20 seconds after turning on the power.
12 012: Effect RAM CheckChecks all EFFECT RAMs.
Confirm that the LCD shows the following message.
Effect Check TG1 OK
Effect Check TG2 OK
16 016: TG1 CheckChecks the tone generator 1.
The sine waves between C2 and G4 automatically sound in order.
Confirm that no abnomal sounds or noise are generated.
17 017: TG2 CheckChecks the tone generator 2.
The sine waves between C2 and G4 automatically sound in order.
Confirm that no abnomal sounds or noise are generated.
18 018: 
TG connection CheckChecks connection of the tone generator 1 and 2.
The sine wave sounds for about 2 seconds.
Confirm that no abnomal sounds or noise are generated.
C2# G2#
F2
POWERON /    OFF
(Fig.1) 
						

							Tyros / TRS-MS01
6619 019: Pitch CheckChecks pitch and volume decay.
1) Connect a frequency counter to the [PHONES] jack (either L or R) with a load of 33Ω
and set the [MASTER VOLUME] knob to maximum.
Confirm that the frequency counter shows the level of 441.43 
± 0.22[Hz].
2) Connect a level meter to the [PHONES] jack (L, R) with 33Ωand set the [MASTER
VOLUME] knob to minimum.
Confirm that the levels of L and R are -60.0dBm or less.
20 020: Output R CheckChecks the output level of R channel.
1)Connect a level meter to the [PHONES] jack (L, R) with a load of 33Ω and set the
[MASTER VOLUME] knob to maximum.
Confirm that the output levels are as follows.
L: -50.0dBm or less
R: +6.2dBm 
± 2dB
2)Connect a level meter to the [LINE OUT] jack (MAIN L/L+R, R) with a load of 10kΩ
and set the [MASTER VOLUME] knob to maximum.
Confirm that the output levels are as follows.
L: -70.0dBm or less
R: +14.8dBm 
± 2dB
3)Connect a level meter to the [TO SUB WOOFER] jack (R) with a load of 470Ω and set
the [MASTER VOLUME] knob to maximum.
(L: Pin6-Pin3, R: Pin5-Pin3, Pin3: GND)
Confirm that the output levels are as follows.
L: -70 dBm or less
R: +12.8dBm 
± 2dB
4)Connect optional speakers and disconnect the plug from the [PHONES] jack.
Confirm that only the speaker of R channel generates sound.
21 020: Output L CheckChecks the output level of L channel.
1)Connect a level meter to the [PHONES] jack (L, R) with a load of 33Ω and set the
[MASTER VOLUME] knob to maximum.
Confirm that the output levels are as follows.
L: +6.2dBm 
± 2dB
R: -50.0dBm or less
2)Connect a level meter to the [LINE OUT] jack (MAIN L/L+R, R) with a load of 10kΩ
and set the [MASTER VOLUME] knob to maximum.
Confirm that the output levels are as follows.
L: +14.8dBm 
± 2dB
R: -70.0dBm or less
3)Connect a level meter to the [TO SUB WOOFER] jack (R) with a load of 470Ω and set
the [MASTER VOLUME] knob to maximum.
(L: Pin6-Pin3, R: Pin5-Pin3, Pin3: GND)
Confirm that the output levels are as follows.
L: +12.8dBm 
± 2dB
R: -70 dBm or less
4)Connect optional speakers and disconnect the plug from the [PHONES] jack.
Confirm that only the speaker of L channel generates sound.
22 022: 
Output Sub-1 CheckChecks the output level of LINE OUT SUB1.
Connect a level meter to the [LINE OUT] jack (SUB1, SUB2) with a load of 10kΩ and
set the [MASTER VOLUME] knob to maximum.
Confirm that the output levels are as follows.
SUB1: +0.2dBm 
± 2dB
SUB2: -80.0dBm or less
23 023: 
Output Sub-2 CheckChecks the output level of LINE OUT SUB2.
Connect a level meter to the [LINE OUT] jack (SUB1, SUB2) with a load of 10kΩ and
set the [MASTER VOLUME] knob to maximum.
Confirm that the output levels are as follows.
SUB1: -80.0dBm or less
SUB2: +0.2dBm ± 2dB 
						

							Tyros / TRS-MS01
67 28 028: EQ Low CheckChecks the frequency of EQ LOW.
The sine wave of 65.4Hz is output from the [LINE OUT] jack (MAIN L/L+R, MAIN R,
SUB1, SUB2).
29 029: EQ Mid CheckChecks the frequency of EQ MID.
The sine wave of 523Hz is output from the [LINE OUT] jack (MAIN L/L+R, MAIN R,
SUB1, SUB2).
30 030: EQ High CheckChecks the frequency of EQ HIGH.
The sine wave of 4186Hz is output from the [LINE OUT] jack (MAIN L/L+R, MAIN R,
SUB1, SUB2).
31 031: SP Mute CheckChecks the SP mute.
When this test is executed, the sine wave of 4186Hz is output from the [LINE OUT] jack
(MAIN L/L+R, MAIN R).
Confirm that the ON and OFF of SP MUTE can be toggled by pressing the [NEXT]
button and the [BACK] button.
32 032: Mute CheckChecks the mute.
When this test is executed, the sine wave of 4186Hz is output from the [LINE OUT] jack
(MAIN L/L+R, MAIN R).
Confirm that the ON and OFF of MUTE can be toggled by pressing the [NEXT] button
and the [BACK] button.
33 033: D/A Noise CheckChecks the level of D/A noise.
Checks the level of D/A noise when any key is depressed.
1)Connect a level meter to the [PHONES] jack (L, R) with a load of 33Ω and set the
[MASTER VOLUME] kbob to maximum.
Confirm the levels of D/A noise are as follows.
L: -85.0dBm or less
R: -85.0dBm or less
2)Connect a level meter to the [LINE OUT] jack (L/L+R, R) with a load of 10kΩ and set
the [MASTER VOLUME] knob to maximum.
Confirm the levels of D/A noise are as follows.
L: -75.0dBm or less
R: -75.0dBm or less
3)Connect a level meter to the [TO SUB WOOFER] jack (R) with a load of 470Ω and set
the [MASTER VOLUME] knob to maximum.
(L: Pin6-Pin3, R: Pin5-Pin3, Pin3: GND)
Confirm the levels of D/A noise are as follows.
L: -85.0dBm or less
R: -85.0dBm or less
4)Connect a level meter to the [LINE OUT] jack (SUB1) with a load of 10kΩ and set the
[MASTER VOLUME] knob to maximum.
Confirm that the level of D/A noise is -80.0dBm or less.
5)Connect a level meter to the [LINE OUT] jack (SUB2) with a load of 10kΩ and set the
[MASTER VOLUME] knob to maximum.
Confirm that the level of D/A noise is -80.0dBm or less.
34 034: SW,LED CheckChecks all switches and LEDs on the panel
When this test is executed, the LCD shows the name of switches in order.
Press the switch indicated on the LCD.
When the test result is OK, the note corresponding to the switch sounds. (See P.71 TABLE
1)Besides, the LED lights up if it is a LED-attached switch.
When errors are detected, following messages are indicated.
1) SW,LED Check NG (when the test result is NG.)
2) NG (when unfit switch is pressed.)
3) Over Two SW (when plural switches are pressed at the same time.)
After all switches are finished, the LCD shows DIAL DOWN 50. Turn the rotary en-
coder counterclockwise and confirm that the value on the LCD decreases.
Then the LCD shows DIAL UP 0, so turn the rotary encoder clockwise and cinfirm
that the value increases.
Confirm that the LCD shows SW, LED Check OK when the value reaches 100. 
						

							Tyros / TRS-MS01
6835 035: 
All Panel LED On CheckAll LEDs light up.
Confirm that all LEDs on the panel light up. (including MIC SIGNAL and OVER)
* Dual color LEDs illuminate orange.
36 036: 
Red LED On CheckAll of red LEDs light up.
Confirm that all of red LEDs on the panel light up.
* Dual color LEDs illuminate red.
37 037: 
Green LED On CheckAll of green LEDs light up.
Confirm that all of green LEDs on the panel light up.
* Dual color LEDs illuminate green.
38 038: 
Blue LED On CheckAll of blue LEDs light up.
Confirm that all of blue LEDs on the panel light up.
39 039: All LCD On CheckAll dots of the LCD turn on.
Confirm that all dots of the LCD turn on and that whole screen turns to black.
40 040: All LCD Off CheckAll dots of the LCD turn off.
Confirm that all dots of the LCD turns off and that whole screen turns to white.
48 048: Pedal 1 CheckChecks the pedal 1.
Connect the FC-7 to the [ASSIGNABLE FOOT PEDAL] jack (1) and execute the test
with the pedal completely released.
Confirm that the LCD shows DOWN and the note of C3 sounds when the pedal is
depressed.
Confirm that the LCD shows UP and the note of C4 sounds when the pedal is released.
Disconnect the pedal from the jack and confirm that the LCD shows Pedal 1 Check
OK.
49 049: Pedal 2 CheckChecks the edal 2.
Connect the FC-7 to the [ASSIGNABLE FOOT PEDAL] jack (2) and execute the test
with the pedal completely released.
Confirm that the LCD shows DOWN and the note of C3 sounds when the pedal is
depressed.
Confirm that the LCD shows UP and the note of C4 sounds when the pedal is released.
Disconnect the pedal from the jack and confirm that the LCD shows Pedal 2 Check
OK.
50 050: Pedal 3 CheckChecks the pedal 3.
Connect the FC-7 to the [ASSIGNABLE FOOT PEDAL] jack (3) and execute the test
with the pedal completely released.
Confirm that the LCD shows DOWN and the note of C3 sounds when the pedal is
depressed.
Confirm that the LCD shows UP and the note of C4 sounds when the pedal is released.
Disconnect the pedal from the jack and confirm that the LCD shows Pedal 3 Check
OK.
51 051: 
Pitch Bend Wheel CheckChecks the pitch bend wheel.
When this test is executed, the LCD shows Pitch Bend Down. Turn the pitch bend
wheel toward DOWN and confirm that the value on the LCD changes from 64 to 0.
Confirm that the note of C3 sounds and the LCD shows Pitch Bend Up when the wheel
reaches DOWN position.
Next, turn the wheel toward UP and confirm that the value changes from 0 to 127.
Confirm that the note of C4 sounds and the LCD shows Pitch Bend Center when the
wheel reaches UP position.
Bring back the wheel to the center and confirm that the LCD shows Pitch Bend Wheel
Check OK.
52 052: 
Modulation Wheel CheckChecks the modulation wheel.
Set the modulation wheel to MIN position and execute the test.
The LCD shows Modulation Up, so turn the wheel toward MAX and confirm that the
value on the LCD changes from 0 to 127.
Confirm that the note of C3 sounds and the LCD shows Modulation Down when the
wheel reaches MAX position.
Next, turn the wheel toward MIN and confirm that the value changedhs from 127 to 0.
Confirm that the note of C4 sounds and the LCD shows Modulation Wheel Check OK
when the wheel reaches MIN position. 
						

							Tyros / TRS-MS01
69 53 053: After Touch  CheckChecks the after touch.
Confirm that the note of C3 sounds and the LCD shows After Touch Check Start when
any key is depressed.
Confirm that the value on the LCD increases according to the strength of a press.
Confirm that the note of C4 sounds and the LCD shows After Touch OK when the
value reaches 127 (maximum).
* At this test, pressing the leftmost key does not make the system return to the wait state.
Press the [STYLE START/STOP] button to return the wait state.
54 054: Sub Out CheckDetects a plug insertion at the Sub Out.
Insert a plug into the [LINE OUT] jack (SUB1) and confirm that the note of C3 sounds
and the LCD shows SUB1 IN.
Disconnect the plug from the [LINE OUT] jack (SUB1) and confirm that the note of C4
sounds.
Insert the the plug into the [LINE OUT] jack (SUB2) and confirm that the note of C3
sounds and the LCD shows SUB2 IN.
Disconnect the plug from the [LINE OUT] jack (SUB2) and confirm that the note of C4
sounds and the LCD shows Sub Out Check OK.
56 056: MIDI CheckChecks the MIDI.
Connect IN and OUT of the [MIDI A] jack, IN and OUT of the [MIDI B] jack re-
spectively via a MIDI cable and execute the test.
Confirm that the note of C4 sounds and the LCD shows MIDI-A Check OK, MIDI B
Check OK.
58 058: USB CheckChecks the USB.
Connect the product and a computer via a USB cable and execute the test.
Confirm the LCD shows USB Chk In.
Confirm that the note of C4 sounds and the LCD shows USB Chk OK.
* Before executing the test, install the USB-MIDI driver on the computer and complete
the setting of THRU.
64 064: MIC CheckChecks the input level of MIC/LINE IN.
Connect a level meter to the [LOOP SEND] jack (L/L+R, R) with a load of 10kΩ.
Apply a sine wave of -50dBm into the [MIC/LINE IN INPUT] jack with a load of 33Ω
and set the [INPUT VOLUME] knob and the [MIC/LINE IN TRIM] knob to maximum.
Confirm that the level meter reads the following value.
L: +14.0dBm 
± 2dB
R: +14.0dBm 
± 2dB
Next, set the [INPUT VOLUME] knob and the [MIC/LINE IN TRIM] knob to mini-
mum.
Confirm that the level meter reads the following value.
L: -65.0dBm or less
R: -65.0dBm or less
65 065: ROM Check2Checks all ROMs connected to the CPU bus.
Confirm that the LCD shows ROM Check2 OK.
66 066: RAM Check2Checks all RAMs connected to the CPU bus.
Confirm that the LCD shows RAM Check2 OK.
67 067: Flash Check2Checks all flash memories connected to CPU bus. (It takes about 90 seconds.)
Confirm that the LCD shows Flash Check2 OK.
69 069: 
Wave ROM Check2Checks all wave ROMs. (It takes about 30 seconds.)
Confirm that the LCD shows Wave ROM Check2 OK.
71 071: Effect RAM Check2Checks all effect RAMs.
Confirm that the LCD shows the folloing messsage.
Effect Check TG1 OK
Effect Check TG2 OK
72 072: 
Ext. Wave ROM CheckChecks the flash ROM connected to the expansion socket.
Cofirmt that the LCD shows Ext. Wave ROM Check OK. 
						

							Tyros / TRS-MS01
7080 080: 
VIDEO OUT NTSC RGBChecks VIDEO OUT (NTSC RGB).
Connect the video input jack of a TV set and the [VIDEO OUT] jack of the product, and
execute the test.
Confirm that red, blue and green bars are displayed on the monitor.
81 081: 
VIDEO OUT PAL RGBChecks VIDEO OUT (PAL RGB).
Connect the video input jack of a TV set and the [VIDEO OUT] jack of the product, and
execute the test.
Confirm that red, blue and green bars are displayed on the monitor.
84 084: Factory SetFactory Set
The data of flash ROM is initialized to factory preset at the next time the power is turned
on.
Confirm that the LCD shows Factory Set OK.
86 086: Test ExitTest Exit
Exit the test program and return to the play mode.
0dBm = 0.775V
• Power On Reset
Turn on the power with [F#5], [G5] and [A#5] keys pressed and held. The data of flash ROM is initialized to factory preset
when the system starts to run.
Confirm that keys pressed for the Power On Reset execution does not sound when the system enters the play mode.