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Service Manual Roland System 100 

Expander 102 

My copy is missing the page for the parts-layout for the VCF-VCA- Board. I inserted in this file the page from 
the Modul 101 here. The board is identically, but the parts for the noise are not installed. 

This file is a scan from papercopies from the original service manual. Never pay for a copy of this file! 

It should be available for free. 



PANEL DIAGRAM 



m 



I ■ WW ~lW«b 





CONTENTS 

Page 

1. SPECIFICATIONS 

2. PANEL DIAGRAM . 

4 

3. DISASSEMBLY 

5 

4. GENERAL LAYOUT ... 

6 

5. CIRCUIT DESCRIPTION 

6. GENERAL BLOCK DIAGRAM 

9 

7. SEMICONDUCTOR ELECTRODES ... 

9 

8. PRINTED CIRCUIT BOARD ASSEMBLY 

PARTS LIST AND CIRCUIT DIAGRAMS '. ,« 

8-1 . VCO-5 VCO BOARD 

10 

8-2. OP-28 VCF-VCA BOARD 

12 

8-3. OP-29 RING BOARD 

14 

8-4. PS-22, PS-24 POWER SUPPLY BOARD 

16 

9. WIRING DIAGRAMS 

10. ADJUSTMENTS 

18 

11. PARTS LIST 

31 

12. PARTS PICTURE 

35 

i 






-4- 



- 1 - 



mm 






MODEL-102 

1. VCO (Voltage Controlled Oscillator) 



Frequency Range: 
VCO Output: 
VCO Sync. Input: 

CONTROLS 

Waveforms: 
Frequency: 
Fine Tuning: 
Pulse Width: 
Ext. CV or S/H: 
LFO 

2. RING MODULATOR 
Ext. Input: 
Ring Modulator Output: 



3 Hz -40 KHz 

10 Vp-p 

Strong and Weak 

Triangular, Sawtooth, Square, Pulse (Pulse Width Controlled) 

10 Hz - 10 KHz (at A2 key) continuously variable 

1 oct. 

5% - 50% (Manual, ADSR, LFO) 

1 V/oct. 



10Vp-p 
10Vp-p 



3. AUDIO MIXER 

Ext. Input Impedance: more than 50Kft 

CONTROLS 

VCO, Ring Modulator, Ext. Input 

4. HIGH PASS FILTER 

HPF Cutoff Frequency: 10 Hz - 10 KHz 

5. VCF (Voltage Controlled Filter) 

Cutoff Frequency Range: 20 Hz - 100 KHz 

CONTROLS 

VCF Cutoff Frequency: 20 Hz - 20 KHz 

Resonance: - self oscillation 

LFO/Ext. CV: 1 V/oct. 

KYBD CV 
ADSR 

6. VCA (Voltage Controlled Amplifier) 

CONTROLS 

Initial Gain 

LFO 

ADSR 

7. ENVELOPE GENERATOR (ADSR) 



KYBD Gate Input: 
KYBD CV Input: 
ADSR Output: 
Env. Input: 

CONTROLS 

Attack Time: 
Decay Time: 
Sustain Level: 
Release Time: 



+14 from MODEL 101 
1V/oct. from MODEL 101 
+6V (contour peak) 
+6V (contour peak) 

0.4 msec -3 sec. 

0.8 msec —6 sec. 

- 100% (contour peak) 

0.8 msec -6 sec. 

-2- 



> w i w aw WW w • w ■ fc— i»l J w* 



m 

• ■• .'■ 



8. LFO (Low Frequency Oscillator) 

Wave Form: Sawtooth, Sine, Square 

CONTROL 

LFO Frequency: 0.15 Hz, -25 Hz 



9. SAMPLE AND HOLD 

Ext. Input: 
S/H Output: 
Clock Output: 

CONTROLS 

Sample Mode: 
Sample Time: 
Output Lag: 

10. OUTPUT MIXER 

Input: 

Input Impedance: 

11. AUDIO SIGNAL OUTPUT 

High Output: 
Low Output: 



10Vp.p 
± 14.V 

OFF, Sawtooth, Reverse Sawtooth, Triangular, Ext. Input 
0.6 Hz- 125 Hz 
-2 sec. 



6Vp-p max. 
50K ohm 



3Vp-p with 1K-ohm output impedance. 
0.3Vp-p with 1K-ohm output impedance. 



12. HEADPHONE OUTPUT 

0.3V max. into standard 8-ohm stereo headphones. 



13. DIMENSIONS AND WEIGHT 

Overall Size: 
Net Weight: 

14. POWER REQUIREMENTS 

100 -120V 50 -60 Hz 
220 -250V 50 -60 Hz 

15. POWER CONSUMPTION 

10W max. 



610 mm wide, 155 mm deep, 305 mm high. 
7.5 Kg 



-3- 






yjZyffiffiv 



..;w.:f 






ftil 

•. i)'-'v : 3'.',u"/'--i"iC> '•'" 



! 



1976-10-30 SYSTEM 100-102 



GENERAL LAYOUT 



CONTROL PANEL ASSEMBLY 



SIDE BOARD 
N0.8 




CHASSIS N0.106 



SIDE BOARD 
NO 7 



-6- 



1976-10-30 SY5TEMKX3-102 



DISASSEMBLY 



System-100, Model-102 can be disassembled in the following steps when necessary for checking and readjustment. 

The power cord must be disconnected from the power source before proceeding with disassembly. 

Remove the 5 screws on the lower front chassis. 

Remove the 7 front panel screws and also loosen the 10 side board screws. The panel can be opened by pulling the top 

of the panel. 

Use a string through the screw holes to keep the frnt panel from falling too far forward. 



JS- 




f/ 



LOOSEN 

BOTH SIDES 



5- 




■ '\ - ; ^.j.V : .-■* 



mam 




1976-10-30 SYSTEM 100-102 

DESCRIPTION of PCB(Printed Circuit Board) ASSEMBLY 

Since the circuits of the Model 102 are similar to or the same as the Model 101 circuits, refer to the Model 101 section 
of this manual (pp. 7, 8) for circuit descriptions not given below. 

1. VCO BOARD ASSEMBLY (VCO-5) 

1-1. SAMPLE and HOLD 

This circuit takes the periodic samples of voltage levels from the LFO waveforms or external source to produce 
different patterns of up and down voltage steps. 

2. VCF VCA BOARD ASSEMBLY (OP-28) 

3. RING BOARD ASSEMBLY (OP-29) 

3-1. RING MOD is a device which makes use of the double balanced modulation by an IC. 

The RING MODULATOR is a balanced multiplier which supresses the two input frequencies but passes both 
the sum and difference frequencies of the inputs. 

3-2. The CLOCK OSC determines the sample timing of the Sample and Hold circuit. 

3-3. The LAG is a variable RC time constant for rounding off the sharp edges of the Sample and Hold output 
waveform. 

3-4. The INVERTER is used to invert the LFO waveform for use in the Sample and Hold circuit. 

3-5. The VCO SYC function uses an external pulse (usually the square wave output of the Model 101 VCO SYNC 
OUT jack) to synchronize the Model 102 VCO to an external source. 



-7- 



1976-10-30 SYSTEM 100-102 



4. POWER SUPPLY BOARD ASSEMBLY (PS-22, PS-24) 

This assembly is a voltage regulator circuit which provides constant voltages of +14V and -14V. 
Note: The PS-22 board is for 100V - 120V, while the PS-24 board is for 220V - 250V. 
Fuse 0.5A, Fuse Holder TF-758, of Label No. 69, are used on PS-24 alone. 
For PS-22, use a jumper wire on the Fuse Holder. 



-8- 



GENERAL BLOCK DIAGRAM 



SEMICONDUCTOR ELECTRODES (TOP VIEW) 






, ■ 
- : ... '■' '.' «« 



p 

:■ ■ r, 




1 c 

2 C 

3 C 

4 C 



1 


If. 


2 


;;■ 


3 


r*} 


4 


," 


5 


;*, 


6 


O 


7 


/•-; 



8 
7 
3 6 
3 5 



314 
3 13 
312 
311 
310 
3 9 
1 8 





CA1458(G) 



723CN 



TA7136P 



MA726 



TA7504M 
301AH 
CA3080 
CA3130 




ITS1276 



S yJ- 


v — G 


E-412 


D — (f 


J] D 


(ITS30546) 


G — -^ 


^ S 






2SA733(Q) 
2SC945(Q) 
2SC828(R) 




2SC100CKGR) 




2SK30A(Y) 
2SK30A(GR) 



G - 

K - 



N13T1 



B 
C 

E 





o 

n. 



2SD234IO) 



-9- 



VCO-5 VCO BOARD ASSEMBLY PARTS LAYOUT (152-005) 



: 1 '• ; 



'. I 



S/H 
INPUT 

from 
SAMPLE 
MODE 
SW 



-14V 

G 
+14V 





VCOCV IN 
I 


1 I 

h- 


cc 


5 




H 


' 




cc 


'D 


en 
> 

> o 




Q 


> 


CO 


> 


3 
O 


QC 
> 

QJ . 


s 


o 

LU 

CC 


2 


2 






x 

LU 



r v v r t 



Q_ 

o 



Q. 
O 






37 



rt 



?4 25 26 27 23 2? 30 31 ?2 33 34- 35 36 



^ SET 




n_r; 

to 

WAVE 
FORM 
SW 



aa:; 

to 

WAVE 
FORM 
SW 



to 

WAVE 
FORM 
SW 



24- 2<? 26 27 23 29 30 31 32 33 34 ?! 36 37 JS 

® © ® ®€> ©©©©©©© © SCALE © sy SCT © _ 

R2i o i 

R2^~' 



SET 




14 © (fcto7j)(£l£DC / ,, 
4(§) ((«ofej)ls( + «-f 



■; '•- 





Metal Film Type 



Carbon Type 



/VooopJ^y 



Polystyene 
Film Capacitor 



* 


2SK30A (GR) 





2SA733 (Q) 


: 


2SC945 (Q) 





s 



1 S2473 



Metal Film 
Resistor (± 1%) 



- 10 



VCO-5 VCO BOARD CIRCUIT DIAGRAM 






.1 
\- 

'■ it ... 
" v '■' ' 



j." ■'■■ ■; ■> 



' ' . I".- 




NOTES: IC201 , 202 CA1458G 

IC204.205 CA3130 

IC206.208 301AH 

IC207 TA7504M 

(MF): Metal Oxide Film Resistor. 
ALL DIODES ARE 1S2473 

-11 - 



OP-28 VCFVCA BOARD CIRCUIT DIAGRAM 






■ ■ ■ ■ 



■,,-,.. ■.: 



i»fff$t 



VCO-b 




NOTES: 



J ,;,... :S , 



+I4V G -I4V 

Q315-318 2SC945Q (SELECTED VCF) 

Q327, 328, 330, 331 ....2SC1000GR (SELECTED hfe) 

IC301.302, 304 CA1458G 

IC303 TA7504M 

IC305 CA3080 (SELECTED C) 

IC306 TA7136P 



(T) : Tantalum Capacitor 
ALL DIODES ARE 1S2473 

UNLESS OTHERWISE SPECIFIED 



-13- 



1976-7-30 SYSTEMIOO-IOI 



OP-27 VCF VCA BOARD ASSEMBLY PARTS LAYOUT (149-027) 



NOISE AMP,] OUTPUT 
Jxck 



I MIXER 



INI A-&10HZ 
f / / 



PHONES INPUT 




RESONANCE' VR 



ADSR &ATE 1M 
ADSR OUT /t\_ 
ADSR CfATE OUT 



ADR-VR COM. 



1S2473 



0: 

m : 2SK30A(Y) 
(f) : 2SA733(Q) 
Q : 2SC945(Q) 
P I 2SC1000(GR) 




— -Ny «> -t to 

® ® ® © © 

$n o o 



0» /— — V 




;® 

^©i-e> 



^© ©^ 05SO ®@ C5a£> ®@© 

g g v I g s g 



2SC828(R) 
(Selected NZ) 



2SC945(Q) 
(Selected VCF) 



2SC1000(GR) 
(Selected hfe) 



131 U lU'JO JIJlbVli^^-lOA 



OP-29 RING BOARD ASSEMBLY PARTS LAYOUT (149-029) 



;$;?-. 



".-.:: 



to VCOSYNC 
(VCO-5) 

© 

i 



SYNC. IN 
STRONG 



WEAK 




LED LD64R 



OJ' 



KYBDGATE IN 



SAMPLE TIME 
S/H OUT 



CLOCK OUT 



500KA -^ 

?»£■ Cfl from S/H (VCO-5) 

LAG v - y 

- ^1><4 to SAMPLE MODE SW 
-LNJ^ from LFO 
VCO 

LFO,E>,T. IN 
CLOCK IN 

*<£}) to S/H (VCO-5) 
RING MOD. OUT 

to AUDIO MIXER (OP-28) 



o 



o 



Q-V02 



c.t&Z 




e = 


1S2473 


* 


2SK30A (GR 


D-' 


2SC945 (Q) 



(?) : Tantalum Capacitor 

(G) : 1/4R±2% 






-14- 



i»/o-iu-ou otsicjvii\jvj-iv-»^ 



OP-29 RING BOARD CIRCUIT DIAGRAM 



■ ■ 
■ v.; 
'.■•?■■-■' 




NOTES: IC401 •-- TA7504M 
C403--- TA7136P 
ALL DIODES ARE 1S2473. 
@ : Tantalum Capacitor 



HgH§H6> 



tl4v 6 -I4V 



-15- 






TS^^^JU JUIUINUU IUJ. 



PS-22 PS-24 Power Supply Board Assy Parts Layout 



Circuit Diagram 



■::,, K 



; :'' '•■■' 






. I, .' 




A-246I-SC 




O^ 



REPLACE ONLY WITH SAME 
TYPE 500mAT 250V FUSES. 



o 



2SD- 
23U0) 



o 






-**- 



Label Mo. 4? 



3 r^cN 



4-V 
* 



PS-22 
(100-1 20V) 








+ 14V 



PS-24 (220- 250V) 




Power Switch 
MS-066 4K 



Power Transformer 
022-86C(100V-120V) 
022-86D (220V-250V) 



-16- 



WIRING DIAGRAM 



i^ikj- IVJ-o»J OIOI CIV! IV^\^-I\_'^ 



I, .'. 

&£ . 

••r5'.'.- 



XY90 
CLOCK &*rE 
OuT in 



SING 
our 



OUT 



VCO SrNC IN 
STRONG WEAK 



VCO 
OUTPUT 



EXT- 
END. ADSR 
>N OUT 



VCf 


VGA 


err. 




exec* 


CHECK 


Audio 


OUTPUT 


POINT 


FWNT 


IN 


HIGH LOW 



r 



6 o— o-j>— o 



^ 



SAMPLE 
TIME 



4 



of F PA /H /V\ EKT 



i) 






v 



4 4 4 • 
H ha hn f"^ 



WAveFoan 



3' 



:' S4a 



CS4) 

aan\ ru nu 



I 



. AOS» 

> MANUAL 
I UO 




h 



VOLTAGE 

FOLLOWER 



r 



D 



a 



*€ -9 



nn 



IMK 



-®— ®@<ghN 



/ 

AA' 






pecAr 

ATTACK RELEASE 




fl 



Y 






■-a I 



4i /, 



; -H 



rO-0 



-/, 



<M 1 



AA 

SHAPBR 



A 



ITU 

SHAP6R 
P.W.M 



ru: 





vco-s 



fte 



D..i 



AA> 



SHAPER 






N\ 

SHAPER 



N\ 



• 



AOSB 
HATE 



H PASS 

FILTER 



OP-28 






CONTROL 
VOLTAGE 
MIXER 



too 



C>~ 






H'H 






AUDIO 
MIXER 



c>- 



R6 






®h4@ — 



HEAD 

PH0N6 |— ' 

AMP. 



LO-MO \ 



43>-ft4)-W5)- 




*WV -t4V 



+ WV -wv 



1-I4V -id/ 




PS— 22 IOOV-I20V- 
PS — 24 230V-250V - 






-17- 



SYSTEM 100, MODEL 102 ADJUSTMENT PROCEDURES 



la/b- !U-»iU J>YS> I fcM 100-K32 



1. Power supply Voltage Adjustment: 

a) Connect 2 Digital Voltmeter to Terminal "10" of the Power Circuit Board (PS-22, PS-24), and adjust VR101 
(+14V ADJ.) for + 14V 

b) Adjust VR102 (-14V ADJ.) for -14V at Terminal "13". 

c) Tolerance: 14V ± 100 mV. 



LFO Waveform Adjustment: 

a) Connect the Oscilloscope to Terminal "54" of the VCF-VCA Board (OP-28), and adjust VR301 ( N\ wave 
ADJ.) for a Sawtooth wave. 



d) Digital Voltmeter should have: 

Resolution voltage down to DC 10 mV or more 

Input Impedance 1 Mohm or more 



Good 



Bad 



10V 



0-I 




OSCILLOSCOPE 



IP 






(6) (ot (O) (0) 
QOOQ 



POWER 
SUPPLY 
BOARD 



PS-22 100-1 20V 
PS-24 220-250V 



ADJ. 



ADJ. 






-14V 






77 



-{+14V)- 
-(-14V)- 



-18- 



DIGITAL VOLTMETER 



114.00V 



'-"'.' 



/.-vs\ ■ ., •■ :. ... ; » 
. '■<> ■ ' ■.[•-,■ ■ 






OOOO 




7?T 



OOOOOOOOOOOOOOOOO OOOOOOO 



54 O 



® 



VCF. VCA-BOARD 



(OP-28) 



O NK wave AD J 

o @ 

(VR301) 



O 

o 
o 
o 



® 

° © 



® 



O 
O 

O 

O 
O 



-19- 



l»/t»-10-30 SYSTEM 100-102 



ADSR Zero Adjustmeat: 

a) Set the controls of the Control Panel as illustrated below: 




(102) 



b) Connect an Oscilloscope or Digital Voltmeter to Terminal "88" or the ADSR OUTPUT JACK and adjust 
VR302 (ADSR Zero ADJ.) for 0V. 



OSCILLOSCOPE 



DIGITAL VOLTMETER 



VCF. VCA-BOARD 



(OP-28) 



ADSR 
Zero ADJ 



O 



Sensitivity 



10mV/cm 




TTT 



OOOOOOOOOOOOOOOQOOOOOO ooooooo 

o 



® 



® 



o 
o 



o W ® 

°(VR302) 



■ ®r ® 



© 



o 
o 

o 

o 
o 



mm 









RING MOD Adjustment: 

a) Set the controls of the control panel as illustrated below: 



' ^"••-i"Ul > 



DE-1 



.Q]<x>- 



5 



a--fj 



b) Connect the Oscilloscope to terminal "113" or the RING OUTPUT jack and adjust VR-401 (SIG BAL) for 
minimum output. 

c) Allowable voltage limit; under 100 mV 

d) Reset the controls as illustrated bellow: 




e) Adjust VR-402 (MOD BAL) for uniform waveform and amplitude. 



lOVpp 





GOOD 









O 
O 

o 
o 
o 
o 
o 
o 
o 



o 

o 

o 




RING-BOARD 


O (OP-29) 

O 



/-TN MOD BAL 
\®J (VR402) 

SIGBAL. 
q (VR401) 

O 


® 


© 



BAD 



RING 
OUTPUT 
JACK 
A 



OSCILLOSCOPE 




*JH 



20- 



-21 - 



upik 



VCO ADJUSTMENT 



1. Triangular! AA ) Wave Form Adjustment: 

a) Set the Control Panel as shown below. 



FINE TUNING 



FOEQUENCr VWVVE fOBM 






b) Connect the Oscilloscope to Terminal "40" or the VCO OUTPUT JACK, and adjust VR205 ( AA WAVE 
ADJ.) for the triangular waveform. 

c) Then, adjust VR206 ( AA ZERO SET) so as to balance this output waveform on 0V. 



Good 



Bad 




-5- 




o oo oo oo oo o oo o o o 



o 
o 

O 
O 

o 
oW3 



© ®« 

AA zero SET 

@ ©^ 
O (VR206) 



VCO-BOARD 



(VCO-5) 



AA wave ADJ. 

® ' 

(VR205) 



VCO 

OUTPUT 

Jack. 

A 



OSCILLOSCOPE 




-22 



1976-10-30 SYSTEM 100-102 



1 ■ 



- , ■ j 






2. Square ( nj ) Wave Adjustment: 

a) Set the Control Panel as shown below. 



FINE TUNIHG FfltQUENCV 





WhVF FOAM 

fsN ru '«» 

/sa J — i nu 




b) Connect the Oscilloscope to Terminal "39" or the VCO OUTPUT JACK on the VCO Board (VCO-5), and 
adjust VR207 ( nj 50% SET) for a 50% - 50% square wave. 

c) Re-set the Control Panel as shown below. 

'MOjtNCV VWVI F0M4 

M\ ru •-- 



■# 






B¥ 



VOV'AOt 

CONTROLLED 

OK'LL»tO" 



••Pulse Width Moo (QJ ■ 



m 



PULSE VYIOTH 



d) With the same connection as in b) above, adjust VR204 ( HJ 5% SET) for a 5% - 95% square wave. 

e) Check that the wave form does not disappear when the front panel FREQUENCY control is turned from 10 
Hz to 10 KHz. 



10-- 
0- 



50% 



50% 



O OOOO OO OOO OO o o o 



o 

O 
O 
O 
O 

oBOH 



><on (©) (©) 5 * r 2w> 



/rrs 5% SET ST\ 

Q0>) (VR207)(®; 

® 



O 

o 
o 



VCO-BOARD 



(VCO-5) 



5% 95% 

VCO 
OUTPUT 
Jack 
A 

I 

I 

l 



OSCILLOSCOPE 




777 



-23- 



«7*U~ l\J~OKJ ON">lUVIIW-tUl 



3. VCO WIDTH Adjustment: 

a) Set the Control Panel as shown below. 



FINE TUNING FfigOUENCY W»VE FORM 






'■jCQ STHL *>UI> 



Voltage 

CONTflOLLEO 
OSCILLATOfl 



f 

E»T 

Chi 



^■PiASEWmTHMoo flLI -v 



'USE width 



(102) 



b) Connect the Oscilloscope or Frequency Counter to Terminal "40" or the VCO OUTPUT JACK, and adjust 
VR201 (WIDTH) so that the frequency generations on Keys F1, F2, F3, and F4, become all octave relations 
with each other. 

c) When tuned with a Tuner, use VR202 (FREQ.) for adjustment of the frequency of Key F1. 



S KEYBOARD 



FREQUENCY COUNTER 



Q 



Hz 



F1 F2 F3 F4 

^l*- 71 *^1:2>" ^1:2^ 



ooooo oo ooo oo o o o 

WIDTH /rT «v ^~. / ^ N 
(VR201) MM (©)(©) 



@ ® Q 



°o® 



FREQ 
(VR202) 



40) <N 



VCO-BOARD 



(VCO-5) 



OSCILLOSCOPE 





V H 



c* 



o 



777" -777 



TUNER 



TL 



FiF 2 F 3 F4 



777 



-24- 









■ ■■■■■■ ■< 



' ■ »— *•! t^ss^ iw« 



4. VCO FREQ. Adjustment: 

a) Set the Control Panel as shown below. 



FINE TUNING FXEQUENCV WAVE FOAM 






VOUACI 
COMTMXLEO 

OsciLLAfon 



^-PiaseWiothMoo fill -^ 



QiW 



I 1 ADSB 

§. [ELs 

— LJ ^o — 



PULSE WIOTM 



(102) 



b) Connect the Oscilloscope or Frequency Counter to Terminal "39" or the VCO OUTPUT JACK. With the 
front panel FREQUENCY control set at "10Hz", adjust VR202 (FREQ) so that the A2 key on the 
keyboard produces 10Hz (100ms). 

c) In the same manner, adjust VR203 (SCALE) so as to have 10 KHz (100 /is) when the FREQUENCY control 
is at "10 KHz". 

d) Repeat the above b) and c) until the frequency output matches the "10 Hz" and "10 KHz" indications) 



KEYBOARD 

»»1 



FREQUENCY COUNTER 



A2 



O 
O 
O 
O 
O 

oBJi 



ooooo oo oooooo o o 

@@@ 

SCALE 



© (VR203) (®) * 



FREQ 
(VR202) 



VCO-BOARD 



(VCO-5) 



® 




-25- 



VCF ADJUSTMENT 



.;■:- 






1. VCF DC BAL Adjustment: 

a) Set the Control Panel as shown below. 



FREQUENCY 



Low 

Frequenc 
qscillatof 







**V£ FORM 





fV\ ru wu 




(rW 



EXT INPUT VCQ RING MOO 



J 



High 
Pass 

F ILTER 



Voltage 
Controlled 
F ILTER 



-#• 



y 



== 



J =A= 



b) Connect the Oscillscope to Terminal "71" or the VCF CHECK POINT JACK on the VCF VCA Board and 
adjust VR305 (VCF DC BAL) so the output waveform is symmetrical. 

Check that waveform remains balanced when the CUTOFF-FREQ. control is moved between 10 and 0. 

OSCILLOSCOPE 



VCF 

CHECK <■ 

POINT 
Jack 




oooooooooooooooooooolo ooooooo 

_ (71) 
O 



© 



o 
o 


VCF. VCA-BOARD 


® 






o 
o 




O 

o 


(OP-28) 






o 




o 




o 


o 
o 
o 





o 
o 


© 


VCF 

DCBAL 
(VR305) 




o 
o 





I 






2. VCF WIDTH Adjustment: 

a) Set the Control Panel as shown below. 



SIT INPUT \CO SIHG MOO 



n ri— 



o=- = 




High 
Pass 

F'LTfR 



Controlled - uMft ' 



cv _ 



■0 <OU 



b) Connect the Oscilloscope to Terminal "71" or the VCF CHECK POINT JACK, and adjust VR304 (WIDTH) 
so that the frequency generations of Keys Fl, F2, F3, and F4, are all in octave relationships with each other. 

d) Check that such octave relations remain the same when the front panel CUTOFF FREQ. control is moved 
between 10 and 0. 



KEYBOARD 

i piiiiiwii 

F1 F2 F3 F4 



VCF 
CHECK 
POINT 
Jack 
A 



OSCILLOSCOPE 



^1:2-" ^1:2^ ^-1:2^ 




777- 



ooooooo ooooooo oooooo< 

© 

©WIDTH 
(VR304) 



OOOOOOO 



VCF. VCA-BOARD 



® 



(OP-28) 



O 

o ® 

O 



® 

O 

i ® 



o 
o 



® 



® 



o 
o 

o 

o 
o 



-26- 



.*' ■:■■■'■■ 



-27- 



3. VCF FREQ. Adjustment: 

a) Set the Control Panel as shown below. 



INPUT vCO 



~\f~ 



={]=' --O-Or- 



HlCM 

Pass 

F \Wt 




VAMd 








l 



-#■ 






no *o» 



b) Connect the Oscilloscope to Terminal "71" or the VCF CHECK POINT JACK on the VCF-VCA Board 
(OP-28), and adjust VR303 (VCF-FREQ.) so the frequency produced by Key F1 is 20 KHz (50 ms) 

c) Adjustment as above may sometimes disturb the VCF WIDTH Adjustment as done in (2) above. Repeat, 
therefore, both adjustments of (2) and (3) until both WIDTH and FREQ. are correct. 



■ 


1 


'- V 




. '•■'-: " 


■ 



. 






$m 






KEYBOARD 



VCF 
CHECK 
POINT 
Jack 

I 
I 



OSCILLOSCOPE 



F1 : 20KHz (507*0 



OOOOOOOOOOOOOOOOOOOO 
O 




777 



® 



© 



o ooooooo 



VCF. VCA-BOARD 



® 



(OP-28) 



o 



VCF 

©JFREQ r 

—^ (VR303) u 
O 

°o @ 



Q 
O 

O 

O 
O 



-28- 



i»/o- i«-»-c«-( oroi tu\nnj\j-rv'4 



VCA ADJUSTMENT 









r'-'-'ii'.i.) 

1 



1 






1. VCA CUTOFF Adjustment: 

a) Set the Control Panel as shown below. 




b) Connect the Oscilloscope to Terminal "69" or the VCA CHECK POINT JACK on the VCF VCA Board (OP- 
• 28), and set VR307 (VCA CUTOFF) at the point where the output wave form just dissappears. 

c) Check that, when the INITIAL GAIN on the Control Panel is moved to "10", the output voltage is within 
2-3 Vp-p. 

OSCILLOSCOPE 



VCF 

CHECK < 
POINT 
Jack 




000000000000000000*000 OOOOOOO 

O (69) 



© 



VCA 



VCF. VCA-BOARD 



(OP-28) 



© © 



® 

O 

I ® 



©Cutoff 
(VR307) O 

© 

@ o 



O 

o 



-29- 






2. VCA DC BAL Adjustment: 

a) Set the Control Panel as shown below. 






Low 

F"EQUENCfJ 

OschlatohI 



y 




b) Conned the Oscilloscope to Terminal "69" or VCA CHECK POINT JACK on the VCF VCA Board (OP-28), 
and adjust VR306 (VCA DC BAL) for minimum "click" at the output. 



OSCILLOSCOPE 



VCA 

CHECK <_. 
POINT 
Jack 




O 
O 



O 
O 



oooooooooooooooooolooo OOOOOOO 

O (g) 

® 



VCF. VCA-BOARD 



(OP-28) 



3) 

o 
o 



® 
® 

(^®)(VR306) O 



©j (© 

O 



§ © 



O VCA 

DC BAL. 



O 
O 



-30- 



1976-10-30 SYSTEMTOO-102 

SYSTEM-100 MODEL-102 PARTS LIST 

VC0-5 VCO Board Assembly (152-005) 



052-134C Printed Circuit Board No. 134C 

020-025 IC 

020-024 IC 

020-052 IC 

020-010 IC 

020-032 IC 

017-013 Transistor 

017-012 Transistor 

017-016 FET 

017-036 FET 

018-014 Diode 

028-006 Trimmer Potentiometer 

028-007 Trimmer Potentiometer 

029-108 Trimmer Potentiometer 

029-109 Trimmer Potentiometer 

044-025 Resistor 

044-031 Resistor 

044-037 Resistor 

044-041 Resistor 

044-042 Resistor 

044-047 Resistor 

044-048 Resistor 

044-050 Resistor 

044-052 Resistor 

044-054 Resistor 

044-055 Resistor 

044-057 Resistor 

044-058 Resistor 

044-060 Resistor 

044-082 Resistor 

044-064 Resistor 

044-066 Resistor 

044-068 Resistor 

044-072 Resistor 

044-167 Resistor 

044-599 Resistor 

044-829 Resistor 

044-840 Resistor 

044-845 Resistor 

044-846 Resistor 

044-847 Resistor 

037-001 Capacitor 

037-006 Capacitor 

035-005 Capacitor 

035-01 6 Capacitor 

035-026 Capacitor 

035-028 Capacitor 

035-137 Capacitor 

032-033 Capacitor 

032-037 Capacitor 



CA3130 
301 AH 
CA1458G 
TA7504M 
MA726 
2SC945 (Q) 
2SA733 (Q) 
2SK30A(GR) 
E412I17S30546) 
1 S2473 
50Kn (B) 

100Kfi (B) 
50KH <B) 

100Kft (B) 

ioon 

330ft 

1Kf2 

2.7Kn 

3.3Kfi 

8.2KI2 

10Kf2 

i5<n 

22Kn 

33Kft 

39Kn 

56Kfi 

68Kfl 
100KS2 
200KI2 
220KJ2 
330KJ2 
470Kft 
IMfl 
2.7Mfi 

10MJ2 

820ft 

22Kfi 

82Kft 

100Kft 

120Kn 

10pF 

100pF 

0.001/jF 

0.01/iF 

0.068m F 

0.1/iF 

1000pF 

10/iF 

100/iF 



EVL-R4XA0054B 
EVL-R4XA0015B 
PNB-04C3A-503H 
PNB-04C3A-104H 



1/4W 

1/4W 

1/4W 

1/4W 

1/4W 

1/4W 

1/4W 

•1/4W 

1/4W 

1/4W 

1/4W 

1/4W 

1/4W 

1/4W 

1/4W 

1/4W 

1/4W 

1/4W 

1/4W 

1/2W 

1/2W 
CRB-1/4FX 
CRB-1/4FX 
CRB-1/4FX 
CRB-1/4FX 
CRB-1/4FX 

50V 

50V 

50V 

50V 

50V 

50V 
100 V 

16V 

16V 



±5% 

±5% 

±5% 

±5% 

±5% 

±5% 

± 5% 

±5% 

±5% 

±5% 

±5% 

±5% 

±5% 

±5% 

±5% 

±5% 

±5% 

±5% 

±5% 

± 10% 

± 10% 

± 10% 

± 10% 

± 10% 

± 10% 

± 10% 

±10% 

± 10% 

± 10% 

± 10% 

± 10% 

±10% 

± 10% 

+ 

± 



Ceramic 

Ceramic 

Mylar 

Mylar 

Mylar 

Mylar 

Polystyrene 

Electrolytic 

Electrolytic 



-31 - 



m 



OP-28 VCF-VCA Board Assembly (149-028) 








05 052-135A 


Printed Circuit Board No. 


135A 








020-052 


IC 


CA1458G 








020-015 


IC 


CA3080 


Selected VCA 




020-010 


IC 


TA7504M 








020-027 


IC 


TA7136P 








020-021 


IC 


ITS1276 








017-013 


Transistor 


2SC945 (Q) 








017-047 


Transistor 


2SC945 (Q) 


Selected VCF 




017-003 


Transistor 


2SC1000(GR) 








017-048 


Transistor 


2SC1000(GR) 


Selected hfe 




017-012 


Transistor 


2SA733 (Q) 








017-014 


FET 


2SK30A (Y) 








017-018 


PUT 


N13T1 








018-014 


Diode 


1S2473 








018-027 


Diode 


1N60 








022-077 


Output Transformer 


ST-31 








028-002 


Trimmer Potentiometer 


1KS2 (B) 


EVL-R4XA0013B 




028-004 


Trimmer Potentiometer 


10Kn (B) 


EVL-R4XA0014B 




028-007 


Trimmer Potentiometer 


100Kfi (B) 


EVL-R4XA0015B 




044-025 


Resistor 


ioon 


1/4W 


±5% 




044-027 


Resistor 


ison 


1/4W 


±5% 




044-035 


Resistor 


680ft 


1/4W 


±5% 




044-037 


Resistor 


n<n 


1/4W 


±5% 




044-038 


Resistor 


1.5KH 


'1/4W 


±5% 




044-039 


Resistor 


1.8KH 


1/4W 


±5% 




044-040 


Resistor 


2.2Kn 


1/4W 


±5% 




044-042 


Resistor 


3.3«n 


1/4W 


±5% 




044-044 


Resistor 


4.7Kn 


1/4W 


±5% 




044-045 


Resistor 


5.6KI2 


1/4W 


±5% 




044-046 


Resistor 


6.8Kn 


1/4W 


±5% 




044-048 


Resistor 


10Kft 


1/4W 


±5% 




044-050 


Resistor 


15Kn 


1/4W 


±5% 




044-052 


Resistor 


22Kn 


1/4W 


±5% 




044-053 


Resistor 


27KJ2 


1/4W 


±5% 




044-054 


Resistor 


33KO 


1/4W 


±5% 




044-056 


Resistor 


47Kn 


1/4W 


±5% 




044-057 


Resistor 


56Kft 


1/4W 


±5% 




044-059 


Resistor 


82Kf2 


1/4W 


±5% 




044-060 


Resistor 


lOOKft 


1/4W 


±5% 




044-062 


Resistor 


150KJ2 


1/4W 


±5% 




044-064 


Resistor 


220KJ2 


1/4W 


+ 5% 




044-065 


Resistor 


270KI2 


1/4W 


±5% 




044-068 


Resistor 


470KJ3 


1/4W 


±5% 




044-072 


Resistor 


1M£2 


1/4W 


±5% 




044-166 


Resistor 


2.2Mfl 


1/2W 


± 10% 




037-002 


Capacitor 


15pF 


50V 


±10% 


Ceramic 


037-005 


Capacitor 


47pF 


50V 


±10% 


Ceramic 


037-007 


Capacitor 


250pF 


50V 


±10% 


Mylar 


035-001 


Capacitor 


0.001MF 


50V 


+ 10% 


Mylar 


035-016 


Capacitor 


0.01/nF 


50V 


±10% 


Mylar 


035-018 


Capacitor 


0.01 Sfif 


50V 


±10% 


Mylar 


035-026 


Capacitor 


0.068/liF 


50V 


±10% 


Mylar 


035-028 


Capacitor 


0.1/iF 


50V 


±10% 


Mylar 



32- 



032-099 


Capacitor 


032-107 


Capacitor 


032-071 


Capacitor 


032-033 


Capacitor 


032-036 


Capacitor 


032-037 


Capacitor 



w 


35V 


±10% 


Tantalum 


3.3*iF 


25V 


±10% 


Tantalum 


IjzF 


50V 




Electrolytic 


10mF 


16V 




Electrolytic 


47,uF 


16V 




Electrolytic 


10/nF 


16V 




Non Polarized 



OP-29 Ring Board Assembly (149-029) 



052-136A 


Printed Circuit Board No. 


136A 










020-026 


IC 


LM1496 










020-010 


IC 


TA7504M 










020-027 


IC 


TA7136P 










017-013 


Transistor 


2SC945- 


(Q) 








017-014 


FET 


2SK30A 


(GR) 








018-014 


Diode 


1S2473 










028-007 


Trimmer Potentiometer 


100Kft 


(B) 


EVL-R4XA0015B 




044-030 


Resistor 


27 0f2 




1/4W 


±5% 




044-037 


Resistor 


i«n 




1/4W 


±5% 




044-040 


Resistor 


2.2Kft 




1/4W 


±5% 




044-042 


Resistor 


3.3K12 




1/4W 


±5% 




044-043 


Resistor 


3.9Kfi 




1/4W 


±5% 




044-045 


Resistor 


5.6Kft 




1/4W 


±5% 




044-046 


Resistor 


6.8K12 




1/4W 


±5% 




044-048 


Resistor 


ioxn 




1/4W 


±5% 




044-049 


Resistor 


15Kft 




1/4W 


±5% 




044-052 


Resistor 


22Kft 




1/4W 


±5% 




044-054 


Resistor 


33Kft 




1/4W 


±5% 




044-056 


Resistor 


47Kft 




1/4W 


±5% 




044057 


Resistor 


56Kft 




1/4W 


±5% 




044059 


Resistor 


82«n 




1/4W 


±5% 




044-060 


Resistor 


100Kft 




1/4W 


±5% 




044-062 


Resistor 


150Kn 




1/4W 


±5% 




044-072 


Resistor 


1MS2 




1/4W 


±5% 




044737 


Resistor 


1KJ2 




1/4W 


±2% 




044-599 


Resistor 


ioMn 




1/2W 


±10% 




037-005 


Capacitor 


47pF 




50V 


±10% 


Ceramic 


037-006 


Capacitor 


100pF 




50V 


±10% 


Ceramic 


035-016 


Capacitor 


0.01mF 




50V 


±10% 


Mylar 


035-028 


Capacitor 


0.1/liF 




50V 


±10% 


Mylar 


032-099 


Capacitor 


1MF 




35V 


±10% 


Tantalum 



PS-22 Power Supply Board Assembly (146-022) 100V-120V 
PS-24 Power Supply Board Assembly (146-024) 220V-250V 



052-1 33B 

048-001 

020-031 

017-010 

018-028 

018-029 

018-022 



Printed Circuit Board No. 133B 

Heatsink No.1 

IC 723CN 

Transistor 2SD234 (O) 

Diode ESA-B01-03C 

Diode ESA-B01-03N 

Diode 1N4003 



-33 



1976-10-30 SYSTEM 100-102 



028-002 


Trimmer Potentiometer 




1Kft(B) 




EVL-R4XA0013B 


044-008 


Resistor 


3.9ft 


1/4W 


±5% 




044-037 


Resistor 


ixn 


1/4W 


±5% 




044-042 


Resistor 


3.3KI2 


1/4W 


±5% 




037-008 


Capacitor 


470pF 


50V 


± 10% 


Ceramic 


032-033 


Capacitor 


10/iF 


16V 


± 10% 


Electrolytic 


032-068 


Capacitor 


470fiF 


35V 




Electrolytic 


010-038 


Wafer Terminal 


A-2461-8C 









PS-24 Only 



012-003 


Fuse Holder 


TF-758 




008-024 


Fuse (Midget) 


0.5A 


SGA 0.500 


076-069 


Label No. 69 







Control Panel Assembly 



010-010 


Housing Receptacle 




A-2 139-8 




042-015 


Pin Terminal 




2578T 




044-009 


Resistor 


4.7ft 


1/4W 


±5% 


044-031 


Resistor 


330ft 


1/4W 


±5% 


044-037 


Resistor 


• 1Kft 


1/4W 


±5% 


044-043 


Resistor 


3.9KH 


1/4W 


±5% 


044-048 


Resistor 


10Kn 


1/4W 


±5% 


044-050 


Resistor 


i5Kn 


1/4W 


±5% 


044-060 


Resistor 


100KH 


1/4W 


±5% 



-34- 



i—" w ivy \^\j vjioi i_ivi 1WW~1W^ 



1976-10-JO t>YSTEM100-102 









*■ , • '■-'•, - '"; 



H 



Knob No. 3 

(016-003) 

Knob Trim No. 1 

(063-061) 



Knob TK-1 113 
(016-026) 



Knob TK-1 114 
(016-021) 



mm 




Label No. 92 
(076-092) 



Bushing No. 20 
(068-020) 



V ' : 



.••)■,/ 

5 

I 






■ ".'.J 1 . 



Side Board (Left) 
No. 8 (083-008) 



Side Board (Right) 
No. 7 (083-007) 




Holder 

No. H2 (064H002) 



Chassis 

No. 106(061-106) 



Holder 

No. H2 (064H002) 



W0, 

■■'■■ ('':,:■.■•• 

■•■ v.y. k 



-36- 






-35- 



1976-10-30 SYSTEM 100-102 



.'. I 



DO O 

Q 



O 



O 



Q 



o 



• Q 



® 


©□i© 




e 








e 

*7 





(2)®ai a 




«l B3 





oo 
oo 



o © 




Cover No. 67 
(065-067) 



Cover No. 66 
' (065-066) 






-37- 



i.o««j - iw-ovj OIOiaVII\A^-|<JA 



; ->' ; "v 



'■')■ ,v : • 



m 

V !r'. ; 



"i -,'■■ 

' < ■ :■ ■ 

'■•n ','" .;' 

.v ■; 

mm 



Potentiometer 1 KB 
EVR-20AS15B1 3 (029-002) 
(RV24YN15SBIK 




Potentiometer 50KB 
V24L5N15KC-B50Kfi (030-054) 
(EVC B0AK15B54) 



Potentiometer 100KB 
V24L5N20KC-B100Kft (020-055) 
(EVC B0AK20B15) 



Rotary Switch 
ESR-E124K20Z (001-055) 



Chassis 

No. 104(061-104) 



Potentiometer 100KA x 2 
~EVB-F0A A00A15 (029-168) 






-38- 



MMU-wdWJUkxJ-ra 









« i1 




..,,^¥'i 



Washer 

No. 31 (121-031) 



Rubber Foot 
G-7 (11 1-023) 



Cord Bushing (strain relief) 
R-5 (047-019) 



Terminal Strip 
2L-4P (042-004) 



Long Nut 

No. 1 (120-001) 



RING Board Assembly 
OP-29 (149-029) 



VCO Board Assembly 
VCO-5 (152-005) 



Pig-tail Fuse 
1.0A (008-032) 

1.0A (008-014) 
(For UL) 



Label 

No. 18 (076-018) 

No. 60 (076-060) 




VCF-VCA Board Assembly 
OP-28 (149-028) 



■-(100V-120V) 
• - (220V-250V) 



Power Transformer 

No. 86C (022-086C) - - - ( 1 00V-1 20V) 

No. 86D (022-086D) - - - (220V-250V) 



Power Supply Board Assembly 
PS- 22 ( 1 46-022) - - - ( 1 00 V- 1 20V) 
PS-24 (146-024) - - - (220V-250V) 



Clip 

SCF-L40 (047-021) 



Clip 

SCF-L40 (047-021) 



Chassis 
/No. 105(061-105) 



Caution Mark 

No. 9A (075-009A) 



Name Plate 

No. 37 (075-037) - - - ( 1 00V-1 20V) 

No. 38 (075-038) - - - (220V-250V) 






■39-