Roland RS-505 Operating and maintenance manual

SEP.10 1978
PARAPHONIC
RS-505 MJMIiWIrtiM
RS-505
SPECIFICATIONS
Keyboard
:
CONTENTS PAGE
SPECIFICATIONS 1
CIRCUIT DESCRIPTION 2
BLOCK DIAGRAM 4
TONE DIVIDER &TONE GATE GTH-9/10/11 5
MOTHER BOARD OPH-28 6
STRINGS VOICING &SYNTHESIZER VCFH-2 8
KEY TRIGGER &ENVELOPE GENERATOR . . ARH-1 9
BASS VOICING &LFO LFOH-2 10
PITCH SHIFT OPH-29 11
ENSEMBLE MODULATOR ETH-7 12
POWER SUPPLY PSH-28/29/30 14
PARTS LAYOUT 15
PARTS LIST 16
KEYBOARD PARTS 17
DISASSEMBLY To open upper panel
|remove six wood screws
3x16 oval
Cabinet H170 •-
(081H170)
Side Block H171
(081H171)
fSide Block H172
(081H172)
Strings Section
Tablets:
Controls:
Strings/Synthesizer Section
Control:
Synthesizer Section
Tablets:
Controls:
Upper Strings, Lower Strings
4'-8' Mix (U/L), Attack
Keyboard SK-192A
Bass Section
Tablets:
Controls:
Balance Control:
Ensemble Switch:
Vibrato Control:
LFO Controls:
Pitch Shift
Controls:
Switch:
General
Controls:
Switch:
Rear Panel
Control:
Switches:
Jacks:
Power Consumption:
Dimensions:
Weight:
Upper 4', Upper 8', Lower 4', Lower 8', Bass 8', Bass 16', Ensemble
Resonance, Cutoff Frequency, LFO Sensitivity, Envelope Sensitivity, Attack, Decay,
Sustain, Release
Second Touch On/Off
Cello 8', Tuba 16', Contra Bass 16', Ensemble
Attack, Release
Strings-Synthesizer, Bass Volume
Mode Selection
Depth
Rate, Delay Time
Manual, Time, Pitch Set
Auto/Off/Manual Selection
Tune, Master Volume
Power
Ensemble Tone
Output Level Synth/Bass, Stereo/Mono
Output Stereo, Mono, Bass/Synth, Trig, Gate
Input Ext, Sustain, Pitch, VCF
14W
905 (W) x370(D) x145 (H) mm
14Kg

PCB &CIRCUIT DESCRIPTION
ISTRINGS SECTION IATTACK I|
IIControl
M
^R^Ji0dT°pOCTA\re[12J^ GATE
9° 11DEVIDE^J^JDEVIDERb-*] circuit
RS-505 CIRCUIT DESCRIPTION
PCB AND CIRCUIT DESCRIPTION
1. Mother Board OPH-28
1-1. Master VCO
This is basically an IX oscillator whose frequency is variable by changing the
voltage applied to varicap diode.
Maximum pitch shift range is 1octave.
Frequency stability is within 15 cents at normal working temperature.
1-2. Top Octave Divider
The VCO output is divided to create 12 notes by IC6. The notes are octave downed
several times by the tone dividers at the next stage and routed to the corresponding
tone gates.
The top octave notes themselves are not supplied to the tone gates.
SEP.10 1978
1-3. Tone Divider, Tone Gate (GTH-9, 10, 11)
Pressing akeyswitch applies negative voltage to the transistor keying circuit
Q1(Q4, Q7 ....). This negative voltage is applied to the collectors of Q2, Q3
(Q5, Q6 )where they are chopped by the signal outputs from the dividers
TC-4024's applied to the bases.
The negative voltage from akeyswitch also charges C2 (C5, C8 )which discharges
upon releasing akey and holds Ql on. The discharge rate of this capacitor is
controlled by the frequency of the pulse that comes from Release Pulse Generator
via terminal No. 4.
1-4. Bass Priority
Three 8-bit priority encoders TC-4532 generate 6-bit codes by the on/off action
of the bass keyswitches. These coded signals are fed to the two IC's (TC4042) and
latched. At the same time, the output of TC-4042 is sent to the 8-bit priority
decoders at the next stage and one out of 24 bass notes is selected. The latched
signals are held until anext bass key signal is given.
The bass gate signals for the bass AR envelope generator are also generated by this
priority circuit.
2. String Voicing &Synthesizer VCFH-2
The VCF of the synthesizer section is an LPF of 24dB/oct. Its control voltage is
supplied through an Anti-log circuit. The control voltage of the VCA is also
supplied through an Anti-log circuit. The level adjusting trimmer pot is mounted
on each circuit.
3. Bass Voicing LFO LFOH-2
3-1. Bass Tone Gate
The output signals of the Bass AR Env (Ql, Q2) are chopped by the bass tones at
Q5, Q6, and Q7. The output is sent to the tone filters and the VCF of synthesizer
section.
3-2. LFO
This is an R-C sine wave oscillator whose frequency is varied from about 1Hz to 15Hz
by the RATE control. Its oscillation is once stopped by the gate signal which is
generated by depressing akey, then it starts again and the amplitude is gradually
increased. The oscillation stop time until the start of oscillation is adjusted
by the DELAY TIME control.

SEP.10 1978 RS505
PCB LOCATIONS &INTERWIRING
4. Key Trigger Detector, Envelope Generator ARH-1
The key trigger detector detects change in key bus current, and it generates pulses
by the key on-off operation and trigger pulses by the key on operation.
The envelope generator is triggered by the gate pulse, or by the trigger pulse when
the second touch switch is activated.
5. Ensemble Modulator ETH-7
IC's (2AD512D) are used in the 4sets of aoudio delay lines. The clock frequency
range is 40KHz to 250KHz.
To get various output signals, the processing conditions are different for each of
the delay lines: the clock generators are modulated by four different waves, that
is, two different triangular waves and two different waves of anti-phase triangular
wave plus sine wave.
LPF
/v >•DELAY LINE 1—
»
LPF 1OUTPUT 1
LFO 1CLOCK OSC 1tL_j\^
rv^
DELAY LINE 2LPF _J
LFO 2I_l\ CLOCK OSC 2f
/N^V'~\^^
/v DELAY LINE 3LPF1OUTPUT 2
LFO 3CLOCK OSC 3!Lj\_^
ri^°
L— DELAY LINE 4LPF _J
LFO 4^J\ CLOCK OSC 4T
/\/-1

BLOCK DIAGRAM
SEP.10 1978
|VCF CONT~~f

SEP.10 1978
GTH-9 (147H009)
F#~B
GTH-10(147H010)
C#~F
VALUES FOR
GTH-10
R7, 16, 25= 18K
R9, 18, 27 =3K9
C3 =0.1
C4, 6=0.047
C7, 9=0.022
C10 =0.01
C12 =0.012
C13 =0.0056
TONE OUT U8
TONE OUT U4
NOTE:
1.UKLESS OTIItRWISt SPECIFIED
RESISTOR VALUES ARE IN OHMS
CAPACITOR VALUES ARE IN pF
RS-505
A1.2.3
05 2HI2 4TONE DIVIDER & GATE
505 GTH-11 (147H011)
c
Connectors
J, 5145-06
A
J25145-04A
J32373-06A
QARE 2SA495 GR-TM or
DAf-E 1S1555 or M8555 2SA1C15 GR
or 1S2473
-T) TONE IN
L
-b) -lov
ao,IH
£470K*~
C4
:0.047
R15 D2
£470K'^
C6
:0.04 7
R21 D3
^470K
L-^^ \BASS
~$ TONE OUT 2
—=——4"; RELEASE BUS
l6GND
-TONE OUT L8
8j TONE OUT L4
in
9) TONE OUT U8
©TONE OUT U4#

NS-5U5
AO
MOTHER BOARD
OPH-28 (149H028)
L,
D, 7
RC-855(180juH)
(181K)
SVC-303
Connectors
Js
Ji,Ja,J4, J7
J3
•is
5028-04A
5028-06A
5028-07A
5028-08A
SEP.10 1978
FREQUENCY COUNTER
I768HZ ©
Q
jiiiniim
»»«1iihiuiTn«. Sir
TG-H09
TUNING
The Master VCO should be retuned after:
1. Secondary voltage varies (modification or repairing around
the power supply).
2. Components in the VCO are replaced.
When soldered, allow them to dissipate heat for several minutes.
Set Knobs and Switch as shown.
Adjust VR-1 (OPH-28) for 1768Hz at "A" Tone Divider.
RELEASE PULSE FREQUENCY ADJUSTMENT
Place aclosed plug or DP-1 in SUSTAIN jack on the rear panel.
Adjust VR-2 (OPH-28) for:
WpSEC
OSCILLOSCOPE
27jjSEC
/
0P-H28 ©v)
IC6 ^x-—~S
TP.02/^ I"
I

SEP.10 1978
OPH-28 RS505
AO
6A0S TONE
GRN
TO A6-14
+15V
^C28L YFRTM A9-16
BAtS C-ATE OUT
BLU
TO A6-13
-15 7
BLU
FROM A9-22
.-10V
30 VIO
~FROM A9-24
C-NC
BLK
FROM A9-25

RS-505
A5
VCFH-2A (153H002A) STRINGS VOICING &SYNTHESIZER
SEP.10 1978
111 ?tMMM/
gs
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g8
®, 38!
°i "11II 11II ITT '
lillHHM Ij
lllMllllW '£o
Z
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te
D
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SEP.10 1978
-2 O
=o
co
3=
CO o
DC O
>-c
00
.2. »
to .<U
S.2> E
o. "F
'•— x: DC -c o
£$>HS
ARH-1A (155H001A) KEY TRIGGER &ENVELOPE GENERATOR
RS-505
A4
8±
ISJ N) O)
(O CO N3
^1 ^1 ro
CO CO NJ
§s
i£>Oi {£>Q cfitn

HS-505
A6
LF0H-2A (158H002A) BASS VOICING &LFO
SEP.10 1978
10

SEP.10 1978
PITCH SHIFT
OPH-29 (149H029)
Sgi '• SLE643-15P
J, :2373-04
A
J2:2373-06A
J3:2373-06A
Serial No. 740300
arid higher
VR85 10KB
R15]
R16 delete
R17'
CONTROL
PITCH
^h
GATE RULIE
GRY
FROM Jl
AUDIO OUT CHI
fRUM A7-1 j1
CH2 1^
ON $-6,
FRCM A7-p ]|
CH3 |^1
GRN Q-y3r
FROM A
/
-15V
BLU
FROM AO-33
NOTE:
T.UNLESS OTHERWISE SREClFiEL
RESISTOR VALUES ARE IN OHMS
CAPACITOR VALUES ARE INjuF
DARE 1S1555 or M8555 or 1S24 73
G1.2/1 ARE 2SC1515GR
03,5,6 ARE 2SA495 GR-TM or 2SA 1015 GR
II

RS-505
A7
SEP.10 1978
ENSEMBLE
MODULATOR
ETH-7d5iH007)
MODULATOR BIAS ADJUSTMENT
Feed asignal (1kHz, sine, -20dB) into EXT. IN jack on the rear panel.
Connect an oscilloscope to MONO jack.
Set ENSEMBLE changeover switch at I.
Increase the input level until the output is slightly distorted.
Adjust VR-71 so that positive half and negative are symetrical.
For easier check on individual channel, connect the scope at the points:
TP7-301,-401,-501 and -601.
12

SEP.10 1978
ETH-7
RS-505
A7
C4 150 D
,. ,^:D101
gkn 3>-r^-«-
FROM
A6-15
BASS. SYNTH
..DIRECT OUT
jo&y-t GRN
J2 TTO Afa-3
DIRECT SIG
STOP
"BLU
rTO J7
AUDIO OUT
CH1
BRN
^TO A8-9
AUDIO OUT
CH2
^TO A8-6
MOD CONT B
YEL
FROM A6-16
023 IENSEMBLE CONT
;: -€>HT YEL
GCV2J [TO VR91
<5>
^ENSEMBLE CONT
-^4)-fr RED
{TO VR91
+15V
RED
FROM A9-19
GND
BLK
FROM A9-26
^-15 V
-fl9 BLU
^FROM A9-23

ffS-505
A9
POWER SUPPLY
SEP.10 1978
PSH
IakT
28C (146H028C) PSH-29C (146H029C) PSH-30C (
100V 117V
TO A5-18 BRN
AC 100V rCONTRQLl
-"tC UKIN OTV I-
)
-13 BRN o—J[I 1SUSTAINI
orlS 24 73
AC 117V
Wi WHT
PSH-29
BLK
iPCWERl
cVpBLK _
f° S93 pLK JF1
r
T1
022
110C
3LU
GRN
WHT
bikii
u0001
AC 12 5V
BLLH0^
r,uv -
YEL
AC^0V/24CV
W1 fcLU
-^ ENSEMBLE TONEL -
GRN
YEL
5) 1PSH-30
BLK L
r
^4CV
_WHI 4>
BLK \n
REL
_b_RN_,J
AS,
WHT
O) /GEMKO
O.C4 7
AC s.Z„\
aHP*
-1 1
—
I
aste
•mm §
14
117V 220/240V
F, MGP-1A Pigtail SEMKO 1AT
F2315mA
F3315mA
heatst'-nh H-/z

SEP.10 1978
PARTS LAYOUT
POWER SWITCH
SDA1SA-1 (100V)
(001-258)
SDA2SA-1 (117V)
(001259)
SDE4SA-1 (220/240V)
(001-260)
LED
TLR102KB
(019-027)
RS-505
LEVER SWITCH
SLE623-23P
(001-257)
TABLET (See Parts List)
SWITCH SMT-049A
(002-005)
LEVER SWITCH
SLE622-23P
(001-255)
TABLET (See Parts List)
SWITCH SMT-079A
(002-006)
RAILH6
(110H006)
(TABLET
(See Parts List)
SWITCH SMT-029A
(002-004)
KNOB
TK-1114
(016-021)
KNOB
TK-1 113 (016-026)
LEVER SWITCH
SLE643-15P
(001-256)
KNOB NO. 33
(016-033)
BLIND H. 40 (065H040)
KNOB NO. 33
(016-033)
GM10AK10 10KB
(028-1077)
SSB-023-6 RS
(001-183)
Hinge H8
(059H008)
Chassis H68
(061H068)
4x20
Oval
Jack
HLJ-102-1-1
(009-015)
Jack
HLJ-027-0 1-080
(009-042)
Rubber Foot G-5
(111-021)
15

KS-5U5
PARTS LIST
SEP.tO 1978
081H170
059H008
111-021
081H171
081H172
072H041
068-018
110H006
004-010
065H040
016-026
016-021
016-033
009-015
009-042
022-1 IOC
022-1 10D
022-129
008-041
008-066
008-061
149H028
147H009
147H010
147H011
151H007
155H001A
153H002A
158H002A
149H029A
146H028C
146H029C
146H030C
020-156
020-051
020-158
020-090
020-157
020-076
020-041
020-161
020-064
020-096
020-160
020-162
Cabinet HI 70
Hinge H8
Rubber Foot G-5
Side Block HI 71 left
Side Block H172 right
Panel H41 upper
Bushing No. 18 music rack
Rail H6 music rack
Keyboard SK-192A
Blind H40
Knob TK-1 113 large
Knob TK-1 114 small
Knob No. 33 Slide
Jack HLJ-102-1-1
Jack HLJ-027-0 1-080 Bass Synth
Power Transformer No. 11OC 100/1 17V
Power Transformer No. 110D 220/240V
Coil RC-855osc 180/uH
Fuse MGP0001 1A pigtailed w/CSA or
UL marking 117V
Fuse SEMKO 1Amidget prim. 220/240V
Fuse SEMKO 315mA midget sec.
220/240V
OPH-28
GTH-9
GTH-10
GTH-11
ETH-7
ARH-1A
VCFH-2A
LFOH-2A
OPH-29
PSH-28C
PSH-29C
PSH-30C
PCB ASSY
(052H122)
(052H123)
(052H123)
(052H124)
(052H128)
(052H125A)
(052H126A)
(052H127A)
(052H129)
(052H130C)
(052H130C)
(052H130C)
100V
117V
220/240V
ICs
AY30214
TC4001P
TC4042P
TC4051P
TC4532P
TC4024P
TC4013P
TA7179P
UPC4558C
BA662
BA662-A
SAD512
017-131
017-064
017-022
017-010
017-130
017-129
017-106
017-016
018-086
018-014
018-081
019-027
028-1077
028-1068
028-1058
028-1059
028-1054
029-459
029-461
029-462
029-449
029-453
029-472
030-465
030-459
030-469
BBD
001-183
001-255
001-256
001-257
001-258
001-260
001-259
002-004
002-005
002-006
003-010
003-01
1
003-012
003-013
048H012
064H200
068-029
068-034
035-145
035-158
045-005
____JTR^SISTORS^
TN41A PUT
2SA495TM-GR
2SB434-0
2SD234-0
2SC381-R
2SC752G-0
2SC1815-GR
2SK30A-GR FET
DIODES
SVC303
1S2473
1B4B41
TLR102KB
varicap
bridge
LED
JPOTEPmOMIEJERS
GM10AK10B14
JM40AK35B14
VM60ZK30B24
VM602K30B54
VM60ZK30A55
LFE3RC20B14
LFE3RC20B54
LFE3RC20B15
LFE3RC20A54
LFE3RC20A16
LFE3RC16B15L 100KB
SR19R 10K Trimmer
SR19R 1K
SR19R 47K
w/click
4-ganged
20KB
160 pc terminal
500KA
slide ENV
(from Acurve to B)
50KB
100KB
50KA
1MA
SWITCHES
SSB0236RS
SLE622-23P
SLE643-15P
SLE623-23P
SDA 1SA1
SDE4SA1
SDA2SA1
SMT029A
SMT049A
SMT079A
Tablet
Tablet
Tablet
Tablet
slide 2-pole 3^pos^
lever 2-pole 2-pos.
lever 4-pole 3-pos.
lever 2-pole 3-pos.
power 100V seesaw
power 220/240V
power 117V
tablet STRINGS
tablet BASS
tablet SYNTH
green
maroon
white
gray
OTHERS
HeatsinkH12
PCB holder DLC BS-6N PSH
Collar Bush NA-305 PCB
Collar Bush NB-300 PCB
Capacitor ECQS5500J 50pF styrol
Capacitor ECQS1181JZ 180pF Styrol
Resistor array RM-6 334J 330K x6
16

IBRoland
10583
UPC 10583
Roland