Electrical
Current Drain with 12V DC: | 390 mA ± 20% |
No Sound Output | |
Maximum Volume | 1700 mA ± 20% |
with white keys D2 to D3 pressed in |
|
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 | 850 mV ± 20% |
with key G4 pressed in | 800 mV ± 20% |
Phone Output Level (Vrms with 8 Ω load each channel): | 280 mV ± 20% |
with key D4 pressed in | |
with key G4 pressed in | 260 mV ± 20% |
Speaker Input Level: | 5200 mV ± 20% |
with key D4 pressed in | |
with key G4 pressed in | 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
Remove the DSP according to the following procedures.
1.Prepare isopropyl alcohol and a flat IC desoldering machine (Spot Heater
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.
Spot Heater
Alcohl
HG51A115A
LSI
- S
Fig.1 | Fig.2 |
— 2 —