SPECIFICATIONS GENERAL Number of keys: Polyphonic: 8-note Preset tones: Auto-rhythms: Auto-accompaniment: CASIO Chord/Fingered Demonstration tune: Classical Medley Built-in speakers: 8 cm dia. 1.1 W Input Rating: 1 pc. Terminal: AC Adapter Jack (DC 7.5 V) Power source: 2-way AC or DC source...
CPU (LSI101: MSM6387-13) Containing a sound data ROM and a DAC (Digital to Analog Convertor), the CPU provides sound waveform in accodance with the pressed key and the selected tone. The following table shows the pin functions of LSI101. Pin No. Terminal In/Out Function...
TROUBLESHOOTING No power Power indicator does not light up. Connect an AC adapter into the power jack. Does the keyboard work? Check contact at battery springs. Measure voltage at pin 16 of IC AN8053N. Replace D101. Is the voltage +6.8 V? Check contact of power switch.
No sound Measure voltage at pin 13 of IC AN8053N. Is the voltage +5 V ? Measure voltage at pin 16 of IC AN8053N. Is the voltage +6.8 V? Follow flow chart of No Power. Measure voltage at pin 14 of IC AN8053N. Turning power on, measure voltage Is the voltage 0 V? at pin 3 of LSI MSM6387-13.
Measure voltage at pins 22 ~ 30 of LSI MSM6387-13. Is the voltage +0.3 V? Touch pin 5 of LSI MSM6387-13 with test Replace LSI rod (+) of multimeter in resistance range, MSM6387-13. connecting test rod (-) to ground. Does the keyboard work? Is a noise made? Replace LSI MSM6387-13.
PARTS LIST MA-100 Notes: This parts list does not include the cosmetic parts, which parts are marked with item No. "R-X" in the exploded view. Contact our spare parts department if you need these parts for refurbish. Prices and specifications are subject to change with- out prior notice.
FOB Japan Item Code No. Parts Name Specification N.R.Yen Unit Price IC101 2114 3269 IC, Power Amp. AN8053N LSI101 2011 2961 LSI, CPU MSM6387-13 Q101, 102 2220 1387 Transistor 2SC1740SQ-TP-T D101 2390 1323 Diode RB100A-T32-T D102 2390 0371 Diode DSK10B-BT-T D103 2310 7848 Zener diode RD4.