Yamaha UD-Stomp, Service Manual

Page: 26 / 41

UD-Stomp
26
TEST PROGRAM
1
1 2 3
7
8
4
2
3
6
5
1: SW Check
(1) Using the UP and DOWN switches, select “1”.
(This step can be skipped if “1” is already selected.)
(2) Press the STORE switch.
(3) Starting with the UP switch, press each switch whose
LED lights up one after another. After “FUNCTION”,
“BANK”, “3”, “2” and “1”, all LED segments should light
up and then go out.
• A number (0 to 20) is indicated at the right end of
the 7 segment LED.
• If “E” representing an error appears at the left end
of the LED, press the UTILITY switch for resetting.
2: VR Check (Be sure to set each of VR and EXP
PEDAL to be checked at its center position.)
(1) Using the UP and DOWN switches, select “2”.
(This step can be skipped if “2” is already selected.)
A. CONNECTION OF TERMINALS
• INPUT Monaural input
• OUT L/MONO Monaural output (RL 47K
Ω
)
• OUT R Monaural output (RL 47K
Ω
)
• HEAD PHONES Stereo output (RL 33
Ω
each)
• EXP. PEDAL FC7 or Connect VR of B50K.
JK pin 1: MIN of VR JK pin 2: MAX of VR
JK pin 3: CENTER of VR
• DIGITAL OUT Connect the DA converter.
• MIDI IN, MIDI OUT Connect IN and OUT with the
DIN 5P cable.
• HIGH/LOW SW Input Level Select
OFF: 0dB
ON: +10dB
• AC IN Connect the AC adaptor
• STAND-BY SW Power switch
B. CONTENTS OF THE TEST PROGRAM
0: LED Check
1: SW Check
2: VR Check
3: BATTERY Check
4: SRAM Check
5: FLASH ROM Check
6: DSP Check
C. STARTING THE TEST PROGRAM AND CHECKING
While pressing the UTILITY, STORE and SYNC
switches, turn on the POWER switch. The TEST
program will then be started. At this time, check to make
sure that the model name “Ud.S” is displayed for about
2 seconds. The digit at the left end of the 7-segment
LED indicates the test No.
D. SELECTING THE TEST NUMBER
• Using the UP and DOWN switches, select the test
number and press the STORE switch to start testing.
E. OPERATION OF THE TEST PROGRAM AND CHECKING
0: LED check
(1) Using the UP and DOWN switches, select “0”.
(This step can be skipped if “0” is already selected.)
(2) Press the STORE switch.
• LED segments light up one after another starting
with “UP”. When “FUNCTION” is reached, “BANK”,
“3”, “2” and “1” light up followed by 7 segments in
the following order from the left end. After that, all
LED segments light up and go out.(Fig.1)
(2) Press the STORE switch to start checking.
LED display
(3) Turn ASSIGNABLE CONTROLL
p
counterclockwise.
LED display
(4) Turn ASSIGNABLE CONTROLL
p
clockwise.
LED display
(5) Set ASSIGNABLE CONTROLL
p
at the center position.
(6) Turn COARSE
q
counterclockwise.
LED display
(7) Turn COARSE
q
clockwise.
LED display
(8) Set COARSE
q
at the center position.
(9) Check other VRs
w
to
!1
(Fig. 2) one after
another until EFFECT LEVEL
!2
finally.
LED display
(10) Return EXP. PEDAL.
!3
LED display
(11) Push in the EXP. PEDAL.
!3
• All LED segments light up and go out, and then the
checking proceeds to Battery check.
• If VR or EXP PEDAL is not set at its center position,
checking will result in an error and E. 0 will appear
at the left end of LED.
In such case, set it to the center position and press
UTILITY SW for resetting.
• To advance the VR No. (0-13) to be checked, press
UTILITY SW.
2 0.
2. 1
2 1.
2. 2
2.13
2 13.
2. 0
Fig.1