Boss SP 1 Spectrum Schematic

Page 1

SP-1

GAIN ADJUSTMENT OUTPUT WAVEFORM CHECKINCHEFFECT]
ten signal: 5KHmass_ gin», 7101.797". m SPEchUM,
BALANCE :1 mix. (Fem. adiuu mmm pm. In ,0,
2 Edam mm at peaklng Iraq. stHmtm

mu mynahzmHz. square, BUmVpp

$119M QWWW'JLW

NUTE:peaking m. rexponse
soo~smHz G~75d3m
len SPECTRUM at min [FCEWJ

@M

DEC. 26,1980

ET5202-510A (P/N 7529251000)

(pcb 2291032204 or 052-282D)
Serill number with 9100

ET l4}: MODIFICATION
CORTLEV'UUUS LED LJGHTINE

FIT-245 does not keep the LED staying
cn in EFFECT mode. Below describes
modifiazfinn steps.

l. Ber-Jute LED blue lead tc Q4
llector.

eplaca 01a, Use or 0.47/50,
with OOImed mylar.

. Changing of 014 and 015 to
326;)! will ensure stanle flip-
llvp at lower supply voltages
L, 5).

For long battery life, lower-power<

consumption LED SLP-l 353 is used

with later ECBs. Lf the LEDS are
manged, another necessary era-Age

is R27, from lk t2 3914.

w

R1

R9

2; %m r a {Q
m rim 1: i
an my J.
M8 ,
\ R" a mo 11 51293 T O m
c
2\ 7'
N
" m =5» 1} i i O 1??? 3
SERIAL HUI-BER x [T T RIB 0 "
1 l stamped on case bop '5 02 $31
0 ,9, SP- 3 First two di its TE-CyClE when exhausted.
.J _.@4 - 9100 - - 9900 - 0003 - 0305
IN PUT
OUT PUT
BATTERY:
fig '§§x
JACK CHANGE mi . L I no fl mu,
.. . .. 33K - L7! DK l
HEC- 00 t mac-0;. 44 ~
0 J 0 17 :5 Vflalka mum H J muBAWCE
'0! 2 u2 cm nu
_ _ Ic I . mas IflK W,
H
,- [IDKCI
® @ m M
HOSHIEEN vgflZIl-Kfil
' c- 00 - 1
r11? 0 3 BBC 03 7 SPECTRUM
AC ADAPTOR VRZH
(mum)

For positive CGDDSCElOIJ wnh plug

As can be seer from selfrexplanatory
figures above, type 43317 requires a.
mounting hole in a case redesigned
to accommodate its larger housing.

It cannot replace the -0003 existing
in an exclusive case. while, being
smaller, -0003 can enter Lhe hole in

a new case and be installed.

5 2