HP-335 Nov. 1998 KEYBOARD PA-4A88-C2 CIRCUIT DIAGRAM A B C D E F G H I J K L M N O P Q R S T U V TEST MODE Required items MIDI cable (1.5m or longer Part No.23485229 1.5m) Computer test cable for SOUND CANVAS SC-88 (Part No.17049906) Microphone Oscilloscope 1. To enter the test mode Get into the FUNCTION MODE from pressing [Function] button after turning the power On. (Each LED may brink.) Then press [Function] button while holding down the [Track 2] and [Play] buttons. 'JIG' is displayed and the piano shall automatically enter into the TEST MODE. Press [Function] button to get into stage 2. * To exit the Test Mode, turn the power Off. * To proceed on the next mode, press [Function] button.
However, there are some mode that will move to the next item automatically. Please refer to the explanations written to the each mode. NOTE : When there is a malfunction during the TEST MODE, switch the power On again. 2. Display of DEVICE CHECK, ROM VERSION * DEVICE CHECK When enter into the TEST MODE, the DEVICE CHECK will be executed automatically. If there is no malfunction, ROM VERSION is displayed to the 7-SEG LED. In the event of a malfunction, one of the following shall be displayed. 7-SEG LED Failed DEVICE : Program ROM : Working DRAM : Wave ROM : DSP RAM Press [Function] to go on the TEST MODE.
* BUILD NUMBER This numbers are displayed for factory purpose only, please ignore when you execute test mode. 12