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HP-555G
TEST MODE
Note!: When you enter item 9), the user setting data will be set to the factory settings.
Required Items
• MIDI Cable (1.5m or longer Part No.23485229 1.5m)
• Computer Test Cable for Sound Canbas SC-88 (P/No. 17049906)
• Michrophone
• Osciloscope
1. Entering test mode
After turning on the power, press the [Function] button two times while holding down the [Track 4] and [Play] button to enter the Test
Mode.
The following display will appear, and you will enter test mode.
V*** : version number
B*** : build number (This is for factory use only)
*** : destination region (DOM: 100V specs, EXP: 117/230/240V specs)
C*** : CPU build number (This is for factory use only)
* (Build number) and (CPU build number) are generally not displayed in the LCD, but some units of the initial production may display
these. As this numbers are displayed for factory purpose, please ignore when you execute Test mode during the repair.
Press the [Function] button to move to item 2.
* To advance to the next item you will generally use the [Function] button.
For some items, you will advance automatically, so refer to the explanation of each item.
* If you wish to exit test mode during this procedure, turn off the power.
2. Device check and display of ROM version, etc.
During the device check, the following display will appear.
Nov. 1998
9
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