Yamaha GA 011589 service manual Midi Check

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AG-Stomp

(11)Push in the EXP. PEDAL. !4

All LED segments light up and go out, and then the checking proceeds to MIDI check.

If VR, SW 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. to be checked, press MANUAL SW.

3:MIDI Check

(1) Using the UP and DOWN switches, select “3”. (This step can be skipped if “3” is already selected.)

(2) Press the STORE switch.

If the check result is OK, all LED segments light up and go out.The checking function will proceed to the next step.

In case of an error, “E” appears at the left end of the LED. “0” at the right end indicates transmission and “1” indicates reception.

4:SRAM Check

(1) Using the UP and DOWN switches, select “4”. (This step can be skipped if “4” is already selected.)

(2) Press the STORE switch.

If the check result is OK, all LED segments light up and go out.The checking function will proceed to the next step.

In case of an error, “E”appears at the left end of the LED. “0” at the right end indicates IC2 and “1” indicates IC3.

5.FLASH ROM Check

(1)Using the UP and DOWN switches, select “5”. (This step can be skipped if “5” is already selected.)

(2)Press the STORE switch.

If the check result is OK, all LED segments light up and go out.The checking function will proceed to the next step.

In case of an error, “E” appears at the left end of the LED. “0” at the right end indicates “1 sector erase”, “1” indicates “Erase check” and “2” indicates “Write check”.

6: DSP Electric Characteristic

(1) Using the UP and DOWN switches, select “6”. (This step can be skipped if “6” is already selected.)

(2) Press the STORE switch.

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• An input signal will be output when the STORE switch is pressed. “0” appears at the right end of the LED. (Table.1)

• The sine waveform can be checked in all of the analog circuit, AD, DSP-6 and D/A where the signal has passed.

• Initial setting: OUTPUT VR ••• MAX

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Contents Acoustic Guitar PRE-AMPLIFIER AG-Stomp Specifications Digital SectionAG-Stomp Panel Layout AG-Stomp Pre-AmpSection AG-Stomp Footswitch Section Block Diagram DM 2/2 DM 1/2KEC-54233 Circuit Board Layout Wiring Disassembly Procedure Bottom30PN 1/2 Heat Sink LSI PIN Description HD6413002FP16 XQ375A00 CPUYSS910-S XV988A00 DSP6 Digital Signal Processor AK4520A-VF-E2 XT802A00 DAC & ADC IC Block Diagram AsspNJM5532M XC011A00 Circuit Boards To PN1/2-CN302 To PN1/2-CN303 To PN1/2-CN304 AG-Stomp DM 1/2 Circuit Board AG-Stomp DM 2/2 Circuit Board Pattern side AG-Stomp PN 1/2 Circuit Board To DM1/2-CN103 AG-Stomp PN 1/2 Circuit Board PN 2/2 Circuit Board AG-Stomp Pattern side Test Program Connection of TerminalsSW Check Midi Check Input Output Error Messages E1 Midi Receive Buffer FullOmni ON, Mono Parts List Overall Assembly Description Remarks Electrical Parts V7494000 XZ108A00 RG004470 V7491800 VK701100 PN 1/2 DM 2/2 AG-Stomp Overall Circuit Diagram 3/3 DM