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Electrical
Current Drain with 12V DC:
No Sound Output 390 mA ± 20%
Maximum Volume 1700 mA ± 20%
with white keys D2 to D3 pressed in Synth-Bass-2 tone
and in Latin Fusion rhythm at initial setup tempo
Volume; maximum, Touch: maximum
Line Output Level (Vrms with 47 KΩ load each cannel):
with key D4 pressed in FSynth-Bass-2 tone on L-ch 850 mV ± 20%
with key G4 pressed in FSynth-Bass-2 tone on R-ch 800 mV ± 20%
Phone Output Level (Vrms with 8 Ω load each channel):
with key D4 pressed in FSynth-Bass-2 tone on L-ch 280 mV ± 20%
with key G4 pressed in FSynth-Bass-2 tone on R-ch 260 mV ± 20%
Speaker Input Level:
with key D4 pressed in FSynth-Bass-2 tone on L-ch 5200 mV ± 20%
with key G4 pressed in FSynth-Bass-2 tone on R-ch 5600 mV ± 20%
Minimum Operating Voltage: 5.5 V
REPLACING THE DSP (HG51A115A01FD)
Note: To increase productivity ,the DSP HG51A115A01FD is sticked on the main PCB with a double-side
adhesive tape, then its leads are soldered.
Remove the DSP according to the following procedures.
1. Prepare isopropyl alcohol and a flat IC desoldering machine (Spot Heater HS-600).
2. Apply plenty of the alcohol to the adhesive tape from the reverse side of the main PCB. (Fig. 1)
There is a hole on the PCB just under the LSI, and the adhesive tape can be seen through the hole.
3. Leave it more than one minute so that the alcohol weaken adhesive power fully.
4. Using a proper size of nozzle, apply heat to leads of the LSI with the desoldering machine.
5. Grasp the LSI with tweezers, and using gentle force vibrate the tweezers to feel melting solder. (Fig.2)
6. Remove the LSI after meltingsolder at every leads wholly.
Alcohl
Spot Heater HS-600
Fig.2Fig.1
HG51A115A
LSI-S