Roland Boss BF-2 Service Notes

FEB.1987
BF-2/BF-2B
BF-2/BF-2B
SERVICE NOTES
•)&This notes includes the contents of the BF-2 First
Edition and makes it obsolete.
* bf-2 cD+r—tfxy— hfg-WJUJSb tf*y- NzflteL tt0
First Edition
SPECIFICATIONS
Power.Battery 9V (1), AC Adaptor
Current Draw.15mA DC at 9V
Controls.Manual, Depth, Rate, Resonance
Others.Normal/Effect Changeover Switch,
Effect Indicator^ Battery Check)
Delay Time.1 ms ~ 13ms
LFO Speed.100ms ~ 16s
Residual Noise.— 95dBm (IHF-A)
Input Impedance. 470kn
Output Load Impedance .... OverlOkfl
Dimensions.70(W) x 55(H) x 1 25(D)mm (2.8" x 2.2" x 4.9")
Weight. 400g (0.88lbs.)
-screw 3 x 10 mm
f/_^®xCO,l.SpR|NG No. 59
(070-059)
BUSHING
No. 26 (068-026)
No. 46 (066-046)
COVER No.130 (065-130)
BASE No.32 (111-032)
bottom, not shown
PARTS LIST
066-046 Case no.46 (purple)
065-253 Cover no.253 (purple)
072-315 Panel no.315
065-130 Cover no.130 bottom
111-031 Base no.31 pedal matt
111-032 Base no.32 bottom
068-026 Guide bushing no.26
064-151 Holder no.151 washer LED
107-053 Cushion no.53 PCB
065-153 Cover no.153 PCB
070-059 Spring no.59 coil
016-077 Knob no.77
001-295 Switch J-M0404
009-022 Jack HEC-0003 adaptor
009-012 Jack SG7622 OUTPUT
009-036 Jack SG7713 INPUT
PART NUMBER IN NEW NUMBERINGS—
151-054 PCB assy ET-54 (052-517A)
030-952 Pot. VN20AK15 5 0KB
030-953 Pot. VN20AK15
50KC
030-954 Pot. VN20AK15
250KC
SEMICONDUCTOR
017-110
2SC945-P
transistor
017-104
2SC732TM-GR
transistor
017-024
2SA733-P
transistor
017-014
2SK30A-Y FET
018-014
lS2473(or lS1588/DS442)diode
018-075 RD
5
.IEB
-3 zener
018-039 RD11EB-3 zener
019-034 SLP-135B
LED
020-097 UPC4558C IC
020-164
TL022CP IC
15199109N uPC78L05 10
15219211
MN3207
BBD
15219210 MN3102 BBD driver
IfSFtoland
Printed in Japan BG-2
1
ET-54 (151-054) (pcb 052-517A)
ADJUSTMENT
CLOCK FREQUENCY
Connect oscilloscope to
TP-1.
1. Adjust VR7 for T = 25ps.
2. Rotate MANUAL FCW.
T should be 2ys+20?S.
BBD BIAS
MAM'IAL DEPTH RATE RES.
Feed 200Hz sine wave,0dBm
A
/ / into INPUT jack.
Connect oscilloscope to Q3
emitter.
1. While turning MANUAL across its entire rotaion
range, set VR6 for clip-free waveform at the
peaks.
RESONANCE
Plug short circuit into
INPUT jack.
Connect OUTPUT jack to an
amplifier and speaker.
1. While touching screw driver to TP-2, set VR5
to the point where oscillation begings.
IC1, 2 : pPC4558C
IC3 : MN3207 (1024-stage)
IC4 : MN3102 (BBD driver)
~r n r- . mT AAnnT)
-Lup : xj
IC6 : pPC78L05 or equiv.
Ql-3 : 2SC732TM-GR
Q4 : 2SK30A-Y
Q5 : 2SA733-P
Q6-11 i 23C945-P
D1 : RD11EB-3
D2 : RD5.1EB-3
D3-10 : 1S2473 or 1S1588