Roland DR-55 Service Notes

SPECIFICATIONS
OUTPUT DBS : +5 V (8 ms} CSQ : +4 V UO ms}
VOICE : (.at OUTPUT Jack, Power source 6 V)
VOLUME, TONE : at max. ACCENT : at min.
Amplitude (Vpp)
Prequency (Hz)
Decay (ms)
min. avr. max.
min. avr.
max. min.
avr. max
BD
1.0
1.3 1.6
14
62
(16 ms}
18
RS
0.7 0.9 1.2
0.65
0.75
(1330 ms}
0.85 5
7
10
SD
(noise)
0.3 0.6
2.7
3.1
(320 ms)
3.5 55
75
100
HH 1.2
] 1
35
50 70
POWER REQUIREMENTS — 4.5 V-6.5 V. (Current draw 5.5 mA @6 V)
DIMENSIONS -211 (W} x II
6
(D) x 53 (H} mm
WEIGHT
-
PUn
P-
Chassis no.291
(061-291)
Jack SG-8026
(009-048)
LED TLR-124
(019-028)
Knob no.78 -
(016-078)
Switch SSBO2335
(001-183)
Knob no.125
(016-125)
Knob no.77
(016-077)
Switch SSP-04205
(001-293)
Switch SQPR24-12P
(001-228}
* Por the START and STOP switches, refer to the Parts List
^Roland
Printed in Japan AC2 1
* CAUTION: Do not lay jack leads over the PCB as shown in dotted line.
Since high gain stage is located on that area, the leads will
provide feedback loop.
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