Page 1
CONCERTMATE-500
Catalog Number:42-4004
CUSTOM MANUFACTURED
FOR RADIO SHACK, A DIVISION
OF
TANDY CORPORATION
Page 2
CONTENTS
SPECIFICATIONS
3
BLOCK DIAGRAM
5
CIRCUIT
DESCRIPTION
6
MAJOR
WAVEFORMS
14
TROUBLESHOOTING
16
PCB (Top and Bottom Views)
17
ELECTRICAL PARTS LIST
19
MECHANICAL PARTS LIST 25
EXPLODED VIEW/DISASSEMBLY
26
1C AND
TRANSISTOR
LEAD
IDENTIFICATION
27
SCHEMATIC DIAGRAM 28
Page 3
SPECIFICATIONS
Keyboard:
Chords:
Preset tones;
Effects:
Envelope selection:
Synthesizer function:
Auto-rhythms:
Auto accompaniment:
Function:
Memory play:
Sampling function:
Demonstration
function:
Terminals:
Tuning control:
Speaker:
Power
supply:
Auto
power off:
Power consumption:
Dimensions:
32 Keys
4-note polyphonic
5 PCM: piano, brass ensemble, trumpet, synth drums, human voice
3 Harmonic synthesis: flute, pipe organ, jazz organ
Vibrato, portamento
13
Harmonic synthesis
(16', 8', 5-1/3', 4', 2-2/3',
2
\
1-3/5', M/3', V
to 14 levels for each harmonic)
1 1 rhythms: disco, rock, pops, march, samba, bossa nova,
rhumba, 4-beat, swing, slow
rock, waltz
Ftll-in
key
Tempo keys
Concert chord: maj. min, 7th, min
7
Chord selector system: maj, min, 7th, min
7,
maj 7
,
dim,
sus
4,
aug 6th, min
6,
m 7-5, mM 7
Playback tones: 2
4-note polyphonic memory: 400
steps
3-channel multi-memory: Chords
99
steps,
solo
1/solo 2
198
steps
each
Auto play
One key play
Method: 8-blt PCM
Rate: 9.34
kHz
Time: 1 .4 sec. (auto trigger system)
Input method: Internal microphone, external microphone, line
Loop set
Envelope select
Toy Symphony
(one-touch endless)
MIC, LINE-IN, output (mini jacks)
t30
cents
3-1/8"
(8cm)
X
1 (output 1W)
Five
AA-size
batteries
External adapter
7 min. after
last
operation
1.8W
18-1/8"(W) X 6-1/8"(D)
X 1-3/4(H) or
461(W) X 155(D)
x44(H)mm
2.4
lbs (1.1kg) including batteries
Weight:
Page 4
ELECTRICAL SPECIFICATIONS
1 . Current Drain at DC 7.5V
Input
a) No sound output
b) Maximum
sound output
with 4 keys A4
thru
D5
being pressed
simultaneously and
with tone at Flute,
mode at Normal,
envelope at
G#5
2.
Auto-power off Time
when A4 is turned to
442 Hz
3.
Output Level
with C4 key pressed in
Flute (47kohm load)
4. Sound
Pressure Level
at 10cm away
from speaker with G5
key
pressed in Flute tone
5. Pitch Variable
Range
when A4
is turned
to
442 Hz
Note: 1 i
»
1/100 half note
6.
Minimum Operating DC
Supply Voltage
for sound to not
distort noticeably
7. Mic
Input Sensibility
at 1
kHz for
sampling
8.
Line Input Sensibility
at 1kHz for
sampling
9. Line Output
Level
with
A3
key by
sampling external 1 kHz
a)
4mV input at Mic
b)
lOOmV input at
Line
Nominal
Limit
54mA
54mA
±
30%
225mA 225mA
±
30%
7 min. 30 sec. 7
min. 30 sec.
±1
min.
1.1V
1.1V
±30%
106dB 106dB
± lOdB
442Hz
±
304 442Hz
i 304
5.5V
6.0V
4mV
lOOmV
470mV 470mV
±
20%
550mV
550mV
±
20%
Note:
Nominal specs
represent the design specs; all units
should be able to approximate these
-
some will
exceed and some may drop
slightly below these specs. Limit specs
represent
the absolute
worst condition that
still might be considered
acceptable; in no case should
a unit
perform to less than
within any limit spec.
Page 5
BLOCK DIAGRAM
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Page 6
CIRCUIT
DESCRIPTION
CPU (MSM6283
01GS; LSI Y)
•
Generates pitch
and
envelope
signals for melody,
chord,
bass, and obbligato
sounds.
•
Provides
percussion sounds.
•
Controls keys, switches,
RAMs, and ROM.
The
following is a list of
pin functionsofthe
CPU.
PinNo. Terminal Name In/Out Functkon
1 BOND Ground iOV) source ror AOC iAnalog
to Dignal Converter)
2
'
VAOC
*
-5V
source tor
AOC
3.4
T
No fur^citon.
5-11
1
100-106
»
In/Out Data bus
<100-
106).
"^12
’
AO Out .
Address
bus (AO).
13
:
107
•
*
1
m/Out Data bus
(107).
14 A1
1
Out Address bus (A1).
is’
'
CE
¥ ^
'
Out Chip enable sigr>al
for
the memory
devices.
16-18
A2. A10.
A3
T
•
Out
Address
bus <A2, A3. A 10).
19
idE
•
«
Out Output enable signal for the memory devices.
^20-30
I
A4-9. All-15 Out Address bus (A4
-
A9, A1
1
-
A15).
A
”
’31*
*
I
wt
W
w
Out Write signal output.
1
When
"L".
the CPU writes
data
into
the memory
devices.
32
1
RPSH
1
Out
Refresh signal
output.
When
'X*'. the CPU
refresh
the memory data of RAMs.
~33-39 f
r~
No
function.
40
[gno
^
Ground
(OV) source.
“‘41.42*
r
1
No function.
43
VDD1
1
1 -5V
source.
“44-66*”
No function.
"stTbs
”
,
OSI.OSO
'
Irt/Out 7.24
MHz clock pulse inputs.
59
'
1
» —
1
No function.
60
1
1
RESET In
Reset signal input. "H" active.
At power
ON,
the terminal receives art
''H"
level pulse so that the
CPU's
internal
[
circuits
are initialized.
61 ‘k015
1
t
Out |~Control
signal for external
filter circuit.
“62-66“^
No
function.
~67-76“
K09
-
KOO Out
^
Key ar>d
switch common signals
output.
77~84
1
KI1 -kl8 In
Key and switch input signals
input.
85
No function.
86 *P01
*
j
Out
APO
(Auto Power Off) signal.
When the
instrumertt is left
unoperated for approximately
7
minutes,
the
terminal
drops to
"V
level
to shut the voltages off.
87 1
. No function.
88 P03
r
Out
'
Control
signal for external
filter circuit.
Page 7
Pin No.
Terminal Name
'
In/Out
1
Function
89
EH Out
{
Melody envelope signal output.
90 EG
Out
1
Melody or obbligato envelope signal output.
91 EF Out Melody
or
chord envelope signal output.
92 EE
i
Out Melody or bass envelope signal output.
93
!
SH
Out
1
Melody
pitch signal
output.
94
'
SQ
Out
'
Melody or obbligato pitch signal output.
95
SF Out
Melody or chord pitch signal output.
^
96
*
I
SE
Out Melody or bass pitch signal output.
SC
;
Out
i—
Analog percussion signal output.
,
1
98
•
AGNO
1
Ground
(OVI
source for
DAC
(Digital to Analog Converter).
99 VDAC
i
—
5V source for DAC.
j
Vin
r’
1 1
^Sample sound signal irtput.
Note: Since this LSI
functions as negative l
09
ic, OV is provided to VDD1 terminal while
*^5V
source
is appiied to GND terminal.
Keyboard Matrix
KM
1
KI2 KI3 KI4 KIS
KI6
KI7 KIS
KCO SAMPLING
j
1
LOOP SET
1
I
DEMO
ONE
KEY
PLAY
R
ONE
KEY
PLAY
L
•
KCl
PORTA-
MENTO
HARMO.
;
SYNTH.
ENVELOPE
SELECT
VIBRATO
1
F3
F3#
1
G3
G3#
KC2
MEMORY
!
PLAY 1
,1
RESET
1
1
RHYTHM
;
SELECT
1
'
FILL-IN
A3 A3#
B4
J
C4
KC3
•
•
TEMPOS
1
TEMPO
'
1
DELETE
1
CLEAR
1
i
1
C4#
f
•
1
D4
1
.
J
1
D4# E4
KC4
SAMPLING
SOUND
•
HARMONIC
'
SOUND
11
“
•
1
1
1
1
•
F4
1
•
F4# G4
» -
KC5
1
j
1
w
^ ^ ^
4
1
A4
A4#
:1
64
'
1
:
C5
•KC6
JAZZ
ORGAN
PIPE
ORGAN
1
FLUTE
1
HUMAN
VOICE
C#6 D5
1
D6#
1
1
KC7
SYNTH
DRUMS
TRUMPET
1
BRASS
lENSEMBLE
1
PIANO
'
F5
F5#
t
=5
G5#
KC8 NORMAL SOLO
1 SOLO 2 CHORD
1
A5 A5#
B5 C6
KC9
1
PLAY RECORD
!
1
POWER
OFF
Page 8
Nomenclature of keys
F3 A3 C4 E4
G4 B4 OB
F5 AS
C6
G3
B3
04
F4 A4 CS £5 Q5
B&
Envelope/Pitch Mixing Circuit
The Concertmate-500 has
four Envelope/Pitch mixing circuits. The circuits generate melody,
obbligato, chord and bass sounds by
means
of a
mixing envelope and pitch signals from the CPU.
At "NORMAL" mode, all of the
four circuits generate melody signal, while they create
melody,
obbligato, chord, and bass sounds individually at the other modes.
Note:
The waveforms are
only for understanding
the principle of the above
circuit.
The actual
waveforms differ from the
figure.
(§):(!>«
10:1
Figure 2
The pitch signal PS from the CPU is amplified by differential amplifiers (transistors T1 5 and T16).
Since the envelope signal ES from the CPU is a stepped waveform, the CR circuit smoothes it.
These signals are mixed in transistor T17. and the mixed
sound signal is provided to
the filter
circuit,
Page 9
Filter Change-Over Circuit & Percussion Circuit
Percusston Filter
Filter
Analog
Switch
IC2
Chord Filter
K015
CPU
P03
MSM6283
•DIGS
SC
LSI
1
(Percussion
sound signal)
Melody Filter
Figure
3
Melody
or
<C
Bdss
sound
signal
Melody
sound
signal
Melody
or
<
Chord
sound
signal
^
Melody
or
Obbligato
sound Signal
The Concerimate
500
has four Envelope/Pitch
mixing circuits.
In accordance with
the mode switch
position,
signals
P03 and K01
5
turn the analog
switches on or off so that
the sound signals
pass
through the appropriate filters.
P03
1 K015
NORMAL
'
H
L
SOLO
1
SOLO
2
:
CHORD
1
L
H
I
On "NORMAL"
mode,
all
Envelope/Pitch mixing circuits generate
melody
signals,
and the signals
pass through the melody filter. When the mode switch
is at the other position,
each Envelope/Pitch
circuit
creates
different
sound signals. These signals
pass
through
corresponding filter's.
The percussion signal comes out from the CPU directly,
wherever the mode
switch position Is set.
As the signal is a stepped
waveform,
the percussion filter shapes
it.
Page 10
Sample Sound Input Circuit
VC
Figure 4. Sample
Sound Input
Circuit
Sampling
Start
Figure
5.
Vin
Input
Trigger Level
As shown In Fig.
4,
the circuit
provides sampling signals
to pin 100 Vin terminal of
the CPU.
By divider
circuit of
2
pcs of lOOkohm
resistors, the sampling signal
is biased on 2.5V.
When the sampling
sound
level
exceeds ±0.3
t5V as shown Fig.
5,
the CPU
starts to transmit
the
sampling sound
data to
the
RAMs during the following
time.
Sampling time
RAM's Capacity
(Kbit)
Sampling Data Bit
(bit) x Sampling Frequency (kHz)
108.544(Kbit)
8
(bit) X 9.387 (kHz)
s
1.4454 Sec.
s
1.4
Sec.
While sampling, the
CPU doesn't output key
common signals
(KOO
~
K09), so that the keyboard
cannot
be operated.
Page 11
ROM St RAM
Accesses
RAM
(1)
and RAM (2) are
dynamic 64Kbit RAM. Since
they are dynamic type, data should
be
refreshed every 2msec. at
least. The
memory
is
used as
the demonstration, memory play, and
sampling data area.
The chip select condition
and memory assignments are
as
shown below.
Chip^\
I
1
A15
'
1
CE
1
OE
1
Memory Assignment
RAM
(1)
1 1
1
H
,
1
1
1
(LSB)
L
22.528 bit (MSB)
L
1
u
1
Demonstration/Memory play
1
Sampling
1
RAM {2)
1
1
1
1
1
1 1
{LSB) 65,536 bit (MSB)
Sampling
RAM
(1)
cannot record
demonstration data and memory play data at the same time.
Page 12
The capacity of ROM is 256 Kbit
and
contains the program for system
execution.
The chip
select
condition is as
shown below.
Power Supply Circuit
The power supply circuit has
a voltage regulator
and an APO
(Auto
Power
Off) circuit.
When
power is ON and at the normal
operation, the APO
signal from the CPU
keeps "H" level.
Transistors
T4
and
T8 turn on, so that voltages
VH, VLl, VL2
and VE are provided
to
the
circuits.
When the keyboard is not operated
for seven minutes,
the APO signal
becomes "L" level.
Transistors T4
-
T8 turn off causing
the voltages
to
shut
off.
Voltages VA (5V) and VDD1
(ground) are always provided
to the CPU even
at the APO.
Transistors T1
,
T2 and T3
form
a voltage regulator.
Using the LEDs characteristic
of current
regulation,
T1 stabilizes the battery voltage
at 5V and the darlington-connected
T2
and
T3
amplifies the current.
Page 13
Reset Circuit
VAI5V)
GND
Figure
8
Voltage VA
(Point®!
Preset Signal
(Point®)
Figure 9
At
power ON, the waveform of point
2
provides
a pulse by the differential circuit of resistor
R
and capacitor C.
The pulse initializes the internal circuits of the CPU.
Page 14
MAJOR WAVEFORMS
Attenuation of probe is 10 :
Checkpoints: Refer to the PC8 View on
page 17.
^^Clock Pulse Signal
0,1V/div, 0.1 mS/<Jiv
Reset Signal
0-2V/div,
2mS/div
Pitch Signal
tor Piute
50mV/div, 0-5mS/div
Envelope
Signal for Flute
2mV/div.
0.5mS/div
Percussion
Signal
SOmV/div,
5mS/div
Rhythm:
Rock. Tempo: Maximum
Envelope/Pitch Mixing Signal
20mV/div. SmS/div
Tone: Flute.
Key:
C3
Tone: Flute, Key:
C3
Page 15
Refresh
Signal
0.2V/d(v, lO^iS/dlv
0CE
Signal
0.2V/div,
10^S/div
Tone; Sampling, Key:
G3
Key
Common Signal KOO
0-2V/div, 0.5mS/div
@Key Input Signal KI8
0-2V/div, 0.5mS/div
Page 16
TROUBLESHOOTING
Trouble Checkpoints
and
Possible
Cause
Does not work at all
(Pilot lamp does not
light)
• Check the voltages
VA (+SV), VE (+3 .35V), VC (+5V) and
VD (+5V).
•
Check the reset and APO signals.
•
Faulty parts: Transistors
Tt
Power
switch, or CPU
(LSI 1).
Does not
work
at
all
(Pilot lamp
lights)
• Check the voltages
VH (+7.5V), VC (+5V) and VD (+5V).
•
Check
the
clock pulse and key common signals.
•
Faulty parts: Transistors
T5 T8.
Ceramic Trimmer
VCT84K.or ROM
(LSI 4).
1
'1
Preset tone
does
not 1
sound on PLAY mode
• Check the voltage VH (+7.5V).
• Check the analog signal at base of transistor
T1 1
or Power
amp. (IC1).
• Faulty parts: Transistors
T7 T9, Til, CPU (LSI Dor
Power Amp.
(ICl).
Chord
or Bass tone
does
not
sound on
C)HORD mode
• Check the analog signal at collector of transistor
T18
or T23.
• Check the analog signal
at source
of
FET TIO.
• Faulty parts: Transistors
T18 “*'T23, TIO, or Analog
Switch
(IC2).
Melody
or
Obbligato
tone does not sound
on
SOLO 1orSOLO
2 mode
• Check the analog signal at collector of transistor
T13
or
T17.
and at emitter of transistor
Til.
• Faulty parts: Transistors
T12 T17
or
T1 1.
Memory/Oemo play
does not perform
•
Faulty pans; RAM
1
(LSI
4),
ROM (LSI
2).
CPU (LSI Dor
Chip Selector (IC3).
Sampling impossible • Check the analog signal at collector of transistor T25 at
sampling time.
• Check the vol tage (2.5
V )
of pin
1 00
of the CPU
{ LSI 1 ).
•
Faulty parts: Transistors
T24,
T25.
CPU
(LSI
1
).
RAM 1
(LSI4)or Chip Selector (IC3).
Distorted sound
•
Faulty parts: Transistors T1 2 T20, T9,
or
Power Amp.
(ICl).
A certain key or switch
does not respond
• Check the contacts of
PC
joirter or
contact
rubber.
• Clean the contacts on the keys and the switches.
Percussions do not
sound
• Chedc the analog signal
at
pin
97
of the
CPU.
•
Check
the poor soldering on pin
97
of the CPU.
•
Faulty parts: CPU (LSI 1).
Reference Waveform
Waveform
@
Waveforms
@
Waveform(^
Waveform
@
Page 17
PCB
{Top
«id
Bottom
V«w&)
Page 18
Page 19
ELECTRICAL PARTS LIST
Ref.
No. Description
Radio Shack
Part Number
Manufacturer's
Part Number
Capacitors
Cl Electrolytic 2200pF
16V
±20%
CC-228MBOA
2804 9731
C2 Electrolytic 2.2pF 50V ±20%
CC-225MJBA 2804
5336
C3
Electrolytic
47^F 10V
±20%
CC476MCBA
2804 5069
.
C4,C5
Semiconductive
0-0 Ip
F
25V
±10%
CC-103KFBZ
0002 8903
C6
Mylar* 0.1 5pF
50V
±10%
CC-164KFB2 2830 6067
C7
Electrolytic 220pF
10V
±20%
CC-227MCBA 2804 5140
C8
Ceramic
150pF 50V
±10%
CC-151KJBC
2818 0039
C9
Ceramic 220pF 50V
±10%
1
CC-221JJBC
2819 0107
CIO
Electrolytic lOOpF
10V
±20%
'
1
CC-107MCBA 2804 4879
cn
Electrolytic 47pF 10V ±20%
CC-476MCBA 2804 5069
C12,C13
Electrolytic lOOpF
16V
±20%
2804 4933
C14'-C16
Electrolytic 50V ±20%
CC-105MJBA 2804 4925
C17
Electrolytic 330pF 6.3V ±20%
CC-337MBDA 2804 5808
C18
Semiconductive O.lpF 16V ±10%
CC104M0CZ 0002 9177
C19
1
Electrolytic 2.2pF 50V ±20% CC-225MJBA 2804
5336
C20, C21
,
Semiconductive 0-047pF 16V
±10%
CC-473KOCZ
!
0002 9178
C22, C23
Semiconductive O.lpF 16V 110%
CC-104MDCZ 0002 9177
C24
Ceramic 56pF 50V
±5%
CC-560JJBC 2819 0344
C26
1
Ceramic ISOpF
60V
±5%
CC151JJBC 2819 0654
C26
!
Ceramic lOOpF 50V
?5%
CC-101JJBC 2818
3054
C27
Semiconductive O.lpF
16V
±10%
CC-104MDCZ 0002 9177
C28
Electrolytic
lOpF
16V ±20%
1
CC-106MDCA
2804 5051
C29. C30
Semiconductive O.OlpF 25V ±10% CC'103KFB2
0002
8903
C3LC32
Semiconductive O.lpF 16V
±10%
1
CC-104MDC2 0002 9177
C33
Electrolytic lOOpF 6.3V ±20% CC-107MBOA 2804 9374
C34
Semiconductive O.lpF 16V
±10%
CC-104MDC2 0002 9177
C35
Semiconductive
O.OlpF 25V
±10%
CC-103KFBZ 0002
8903
C36
Semiconductive lOOOpF 25V
±10%
CC102KFB2 0002 8898
C37
Semiconductive
6800pF
25V
±10% CC-682KFB2
0002 9179
C38,
Semiconductive 0.047pF 16V
±10%
CC-473KDCZ
1
0002
9178
C39
Semiconductive O.lpF 16V
±10%
CC-104MDCZ
0002 9177
C40
Electrolytic IpF 50V
±20% CC-105MJBA 2804 4925
C41
Semiconductive O.lpF 16V ±10% CC-104MDCZ 0002 9177
C42
Semiconductive 0.047pF 16V
±10%
CC-473KOC2 0002 9178
C43
Semiconductive O.lpF 16V
±10%
CC-104MDC2
0002 9177
C44
Electrolytic IpF
50V ±20% CC-105MJBA 2804 4925
C45
Semiconducti ve O.lpF 16V
±10%
CC-104MDC2 0002
9177
*
Mylar is a registered
trademark of E.l. Du Pont de Nemours and Company.
Page 20
Ref. No.
Description
Radio Shack
Part Number
Manufacturer's Part Number
C46 Semiconductive 0.047pF
16V
±10%
CC-473KDCZ
0002 9178
C47 Semi conductive O.lyF
16V
±10%
CC-104MOC2
0002
9177
C48 Electrolytic
imF 50V
±20%
CC-105MJBA 2804 4925
1
C49 Semiconductive O.lpF
16V
±10%
]
CC-104MDCZ
1
!
0002 9177
CSO
Semi
conductive 0.047;^F
16V
±10%
CC-473KOCZ 0002 9178
C51
,
Semiconductive
0.1*iF 16V ±10%
CC-104MDCZ
1
0002 9177,
C52
1
Electrolytic
1*iF 50V ±20%
CC-105MJBA
2804 4925
C53, C54
Semiconduct ive
1
OAiiF 16V ±10%
CC-104MDCZ
0002 9177
C55
^
Electrolytic
16V ±20%
1
CC-106MOCA 2804
5051
C56, C57 Semicond uctive
1
0^^xf
16V
±10%
CC-104MDCZ 0002 9177
C58 Semiconductive 0.022^F 26V ±10%
CC-223KFBZ
0002 8894
C59
Ceramic
lOOOpF 50V ±10%
CC-102KJBC
2818 0110
C60 Semiconductive
0.022pF 25V ±10%
CC-223KFBZ 0002 8894
C61
Electrolytic
lOO^F 6.3V ±20%
CC-107M60A 2604 9374
062
Ceramic
lOOOpF 50V ±10%
CC-102KJBC 2818 0110
063, 064 Semiconductive 0.047*iF 16V ±10%
CC473KDCZ 0002 9178
065
Ceramic lOOOpF
50V ±10%
CC-102KJBC 28180110
066
Electrolytic
1
lOO^iF
6.3V ±20% CC-107MBDA
2804 9374
067
Electrolytic
220^F 6.3V
±20%
CC-227MBOA 2804
5638
068, 069
^
Sem
i
COr>d uctive O.O^F
25V
±10%
CC103KFBZ 0002 8903
1
Coils
LI
:
Oscillator.
L10-495 CA-99S1
3841 0695
L2, L3 Noise Filter, ELE-H821KA 3841 0154
Diodes
D1-D56
Silicon,
1S254 OX-0808
0002
8721
ICs
IC1 Amp.,
Power, Linear
LA4138 MX-6210 2120 8329
iC2 Switch,
Analog.
MOS.
TC50H4066P
MX-7302 2100 5045
103 Gate.
NOR.
MOS,
TC74HC02P
MX-7301 2100 4669
Jacks
J1
Power.
H EC
0470
01
-230
3512 3288
J2, J3 Phone, YKB21-5101 J-1797 3612 0665
J4 Mic., YKB21-5006 J-1798 3612 0711
1
LEDs
LED1 Regulator, Voltage, LN2G
LED2
Lamp. Pilot, LN251RPPWE
2320 9619
2320 9764
Page 21
Ref.
No.
Description
Radio Shack
Part Number
1
Manufacturer's
Part Number
LSIs
LSI1
CPU. MSMe283-01G5 MX-7287 2010 0035
LSI2 ROM.
;iPO23C256EAC*0n
MX-7299
2010 0896
LSI3, LSI4
RAM.
MR04168C-1
5.20
MX-7300
2010
0056
Potentiometer
VR1 Volume,
lOkohm, EWA-MK0C25814 P-7948
2770 9800
Resistors
R1.R2
Carbon film 68ohm 1/2W
R3
Carbon film 56kohm 1/5W
R4
Carbor^ film 47kohm 1/5W
R5
Carbon film
68Kohm
1/5W
R6
Carbon film
56kohm
1/5W
R7
Carbon film
33kohm
1/5W
R8
'
Carbon
film Ikohm 1/5W
R9
1
Carbon film
120kohm
1/5W
RIO
Carbon film 15kohm 1/5W
R11
Carbon film
Ikohm 1/5W
R12
'
Carbon
film 2.2kohm 1/5W
R13
Carbon film lOkohm 1/5W
R14.R15
Carbon film
2.2kohm
1/5W
R16
Carbon film 120
kohm 1/5W
R17
j
Carbon film 1
0Okohm 1/5W
R18
Carbon film 330ohm 1/5W
R19--R21
Carbon film Ikohm 1/SW
R22
Carbon film
lOOkohm 1/5W
R23
Carbon
film 68kohm 1/5W
R24. R25
Carbon film lOkohm 1/5W
R26
Carbon film
3^ohm 1/5W
R27
Carbon film
6.8kohm 1/SW
R28
Carbon film
ISkohm 1/SW
R29
Carbon film
560kohm 1/SW
R30. R31
Carbon
film 22kohm
1/5W
R32
Carbon film
lOOkohm 1/5W
R33
1
Carbon film
Ikohm 1/SW
R34'-R37
Carbon film
lOOkohm 1/5W
R38
'
Carbon film
1
2.2kohm 1/SW
R39'-'R41
Carbon film
ISkohm 1/5W
R42
Carbon film
lOkohm 1/5W
R43.
R44
'
Carbon film
lOOkohm 1/5W
±5%
N-0111EFC 0002 9176
±5%
N 0345EQC 0002 8957
iS% N0340EQC 0002 8731
±S% N0354EQC 0002
8947
£5%
N 0345EQC
0002 8957
£5% N
0324EQC
0002 8730
£5%
'
N-0196EQC 0002 8726
±5% N.0375EOC 0002 8953
±5%
N'0297EQC
0002 9002
£6% N-0196EQC 0002
8726
£5%
N-0216EQC
0002 8727
±S% N-0281EQC
0002 8729
£$%
N-0216EQC
0002 8727
15% N-0375EQC 0002 8953
±5%
N-0371EQC
0002 8733
£5%
N-0410EOC
0002 9104
±5%
'
1
N-0196EQC 0002
8726
1
±5%
N-0371EOC
0002 6733
£5% N-0354EQC 0002
8947
±5% N0281EQC 0002
8729
±5%
N-0324EQC
0002 8730
±5% N'0262EQC 0002
9021
£$% N-0297EQC
0002 9002
£5% N-0429EQC
0002 8958
£5% N-0311EQC
0002 8956
±5% N-0371EQC
0002 8733
±5% N0196EQC
0002 8726
±5% N-0371EQC
0002 8733
±5%
N-0216EQC
0002
8727
15%
N0297EQC
0002 9002
15% N-0281EQC
0002 8729
±5% N-0371EQC
0002
8733
Page 22
Ref. No.
Description
Radio Shack
Part
Number
Manufacturer's
Part Number
R45
Carbon
film 47kohm
1/5W
±5%
N-0340EQC 0002 8731
R46
Carbon film lOOkohm 1/5W
15%
N 0371EQC 0002 8733
R47
Carbon
film
47kohm 1/5W 15%
N-0340EQC 0002 8731
R48
Carbon film 3.9kohm 1/5W
±5%
N-0237EQC 0002 9059
R49, R80
Carbon film 4.7kohm 1/5W
±5%
N-0247EQC 0002 8728
R51
Carbon film
2.2kohm
1/5W
±5%
N-0216EQC 0002 8727
R52
Carbon film 3.3kohm
1/5W 1S% N-0230EQC
0002 8946
R53
Carbon film 330ohm 1/5W
15%
N-0410EQC 0002 9104
R54
Carbon film 12kohm 1/5W ±5% N-02B8EOC 0002 695
1
R65
Carbon
film lOOkohm
1/5W
15%
N-0371EQC 0002
8733
R56
Carbon film 120kohm 1/5W
15%
N-0375EQC 0002 8953
R57
Carbon film lOOkohm 1/5W
15%
N-0371EQC
0002 8733
R58
Carbon film 180kohm 1/5W
15%
N0387EQC
0002
9023
R59
Carbon
film 680kohm
1/5W
15%
N-0433E0C
0002 9020
R60 Carbon film
47kohm
1/5W
±5%
N-0340EQC 0002 8731
R61-R63 Carbon
film lOOkohm 1/5W 15% N-0371EQC
1
0002 8733
R64 Carbon film 47kohm 1/5W
16
%
N-0340EQC
1
0002 8731
RisS
,
Carbon film
3.9kohm
1/5W
15% N-0237EQC
1
0002
9059
R66, RS7
1
Carbon film 4.7kohm 1/5W 16% N 0247EQC
0002 8726
R68
Carbon film 2.2kohm 1/5W
15%
N
0216600
1
0002 8727
R69
i
1
Carbon
film 3.3kohm 1/5W
15%
N
0230600
1
0002 8946
R70
Carbon film 330ohm 1/5W
16%
1
N-0410EQC 1
0002
9104
R71
Carbon film 12kohm 1/6W 15%
;
N-0288EQC
1
0002 8951
R72 Carbon
film lOOkohm 1/5W 15% N-0371EQC
;
0002 8733
R73
Carbon film
120kohm
1/5W
15% N-0375EQC
0002 8953
R74
Carbon film lOOkohm 1/5W
15% N-0371EQC 0002
8733
R75
Carbon film ISOkohm V5W
15% N-0387EQC
0002 9023
R76
Carbon film
680kohm 1/5W
15%
N 0433EQC
1
0002 9020
R77
Carbon film
47kohm
1/6W
±5%
'
N 0340EQC
0002 8731
R78*-R80
Carbon film
lOOkohm 1/5W
15%
N -0371600
0002 8733
R81
Carbon film 47kohm 1/5W
15% N-0340EQC
0002 8731
R82
Carbon film
3.9kohm 1/5W
±5%
N
0237EQC
0002 9059
R83. R64
Carbon film 4.7kohm
±5% N-0247EQC
0002
8728
R85
Carbon film
2.2kohm 1/5W
±5%
N0216EQC
0002 8727
R86
Carbon film
3.3kohm 1/5W
±5% N-0230EQC
0002 8946
R87
Carbon film
330ohm 1/5W
±5% N-0410EQC
0002 9104
R88
Carbon film 12kohm
1/5W 15% N-0288EQC
0002 8951
R89
Carbon film
lOOkohm 1/5W
15% N-0371EQC
0002
8733
R90
Carbon
film 120kohm
1/5W 15%
N-0375EQC
0002
8953
R91
Carbon film
lOOkohm 1/5W
±5% N-0371EQC
0002
8733
R92
Carbon film
180kohm 1/5W
±5%
N-0387EQC
0002
9023
R93
Carbon film
SSOkohm 1/5W
15% N-0433EQC
0002 9020
Page 23
Ref. No.
Description
Radio Shack
Part Number
Manufacturer's
Part Number
R94 Carbon film
47kohm
1/5W
±5%
N-0340EQC
0002
8731
R95'-R97 Carbon film lOOkohm
1/5W ±5%
N-0371EQC
0002 8733
R98
Carbon film 47k ohm
1/5W
15%
N-0340EQC
0002 8731
R99 Carobn
film 3.9kohm
1/5W
15%
N
0237EQC
0002 9059
1
R100. R101 Carbon film
4.7kohm
1/5W
15%
N-0247EQC
1
0002 8728
R102 Carbon film 2.2kohm
1/5W
15%
N-0216EQC
0002 8727
R103 Carbon film 3.3kohm
1/5W 15%
N-0230EQC
1 0002 8946
R104 Carbon film 330ohm
1/5W 15%
N-0410EQC
'
0002 9104
R105 Carbon film
12kohm
1/5W
15%
N-0288EQC
!
0002 8951
R106 Carbon film lOOkohm
1/5W
±5%
N-0371EQC
i
0002 8733
R107 Carbon film 120kohm
1/5W
15%
N-0375EQC
! 0002 8953
R1Q8 Carbon film lOOkohm
V5W
15%
N037tEQC
i
0002 8733
R109 Carbon film 180kohm
1/6W
15%
N0387EOC
1
0002 9023
R110 Carbon film 680kohm
1/5W
±5%
N
0433EQC 0002 9020
R111 Carbon film 47kohm 1/5W
±6%
:1
N 0340EQC
^
0002 8731
R112 Carbon film lOOkohm 1/6W 15%
N.0371EQC
0002 8733
R113
Carbon
film
lOOohm
1/5W ±5%
1
N-0132EQC 0002 6723
R114 Carbon film 330kohm
1/5W 15%
0002 9005
R115 Carbon film lOkohm
1/6W
15%
N-0281EQC 0002 8729
R116
Carbon film 120kohm
1/6W l5% N-0375EOC
0002 8953
R117
'
Carbon film
1
ISkohm
1/5W
i6%
N0297EQC
0002 9002
Rns Carbon film 2.2kohm
1/5W
±5%
N0216EQC 1
0002
8727
Rug Carbon film 390kohm
1/5W 15%
:
N0414EQC
1
0002
8961
R120 Carbon film 39kohm 1/5W 15%
N 0330EQC
1
0002 8738
R121 Carbon film 680kohm
1/5W
£5%
N 0433EQC
1
1
0002 9020
R122 Carbon film 68ohm
1/6W
£5%
N-OniEQC 0002 9100
R123 Carbon film 22kohm 1/5W
1
£5%
N0311EOC 0002 8956
R124 Carbon film
1kohm
1/5W £5% N0196EQC
0002 8726
R125 Carbon film 3.9kohm 1/5W
15%
•
N 0237EQC 0002 9059
R126
Carbon film
470kohm 1/5W
15%
N 0423EQC 0002 8948
R127
Carbon film 68ohm
1/5VV
±5%
N-0111EQC 0002 9100
R128 Carbon film
lOOkohm
1/5W
12%
0002 9272
R129 Carbon film lOkohm 1/5W
15%
N'0281EQC
^
0002 8729
R130 Carbon film lOOkohm 1/5W ±2%
;
0002
9272
R131
Carbon film lOOohm 1/5W £5%
N-0132EQC
'
0002 8723
R132
Carbon film 33ohm 1/6W
±5%
N-0087EQC 0002 9012
Transistors
T1,T2 2SC1740SQ, NPN
—
2SC174DSQ
2220 1395
T3 2S6824S, PNP 2SB-824S 2210 6261
T4 2SC2060R
,
NPN 2SC-2060 2220 2632
T5 2SA933SQ, PNP 2SC-933SQ
2200 3721
Page 24
Ref-
No.
Description
T6
2SC2060R.
NPN
T7
2SC1740SQ, NPN
T8
2SA934R. PNP
T9
2SC1740SQ,
NPN
T10 2SK105E.
FET
T11-T23 2SC1740SQ.
NPN
T24, T25 2SC1740LNSR,
NPN
Trimmer Capaci^r
VC1 150pF, 50V,
VCT84K
Radio Shack
Part Number
Manufacturer's Part Number
2SC 2060
2SC-1740SQ
2SA-934R
I
2SC-174DSO
2SK-105E
2SC-174DSQ
i
2SC
1740LNSR
j
L
2220 2632
2220 1395
0002 9175
2220 1395
0002
9076
2220 1396
0002 6740
Page 25
MECHANICAL
PARTS LIST
Ref.
No. Description
Radio Shack
Part
Number
Manufacturer's
Part Number
1
Case
sulMss'y
»
T
op.
M
21
33*2
1
21142
8424 0041
2
1
Panel. Keyboard. M21
282-1
1
2 1161 6907
0310
3
Set
of keys. BlacA. M
1
844-1
K-0861
6907 0160
4 Set of keys. White, Ml
843-1
K-0860
6907 0160
5 Rubber. Contact, Keyboard. M31953-1
HC-4304
6907 0300
6 PCB
ass'v.
Console M3l2d-CN1M
XB-1388 9424 0042
7 PCB assV. Keyboard M3l2d-KY1M
XB1389 9424 0043
3 Microphone, WM-034CY
M-1021
:
3830 9021
9
Sponge, for Microphone,
M42612A-1
6907 0321
10 Wire, for Microphone, M4273d*3
6907 4540
11 PC8 ass'y. Main control. M3129-MA1M
XB-1387 9424 0041
12 Case subass'y. Bottom. M21334*1
2-1163
8424
0046
13
1
1
Spring.
Contact.
Battery, <-^}.
A42606A-1 B-06&2 6345
2238
14 Hardware kit
1
HW-4204004 8424 0047
14-1
Screw, Tapping,
{'f),
2.6x10
$150 1069
15 Cover. Battery. M31417A*8 DB0497 6905 8341
16 Plate. Rating,
U.S.A. 6424 0047
'
CANADA 8424 0048
TANDY 8424 0049
17
Spring. Contact, Battery.
{-}.
M42382-1
6
0932 6912 2630
18
Sponge, for
Keyboard,
M49
18*1
6910
3840
19
Speaker. 4ohm. 6AS-6P109H
|
SP-5346 3631 0014
20
Wire, for Speaker. M42739-2 6907 4530
21 Wire, for PCB ass'y, M3129 MA1M. M42739-1 6907 1 080
22 Plate, Shield, for
PCB
ass'y. M2139M
6907 4550
'
23
Joiner,
12
pins, for PCB-KY1M. SMVJU-12-105M W-3478 3717
0014
24 Plate. Shield, for PCB ass'y. M21392A-1 6907
4561
25 Spacer,
under Board-slide. M42610-1 HC4306 6907 0070
26
Joiner.
20
pins, for PCB-CN1M, SMVJU-20-55M W-3477 3717 0007
27
Rubber,
Cor^tact,
4
contacts aligned horizontally.
M42606-1 HC-4307 6907 0100
28
Rubber, Contact. 10 contacts, M42607-1 HC-4308
6907
0110
'
29
Rubber. Contact, S contacts. M42607-2 HC-4309 6907 0120
30
Rubber. Contact, 4 contacts. M42608-1 HC-4310 6907 0130
31
Set of buttons. 14 pcs. M32105*1
K-0863 6907 0060
32 Spring.
Contact, for Slidir>g knob, M42184-1 S-8044
1
6911 9160
33
Board. Slide, for Sliding
knob,
Po
wer-switch.
Mode-switch, M31673-1 HC-4305 6911 9150
34 Spring, for
Sliding knob. M4491-1 RB-9296 6190
0480
35
Bearing, Ball. SUS
304
2
Pi
HC-0556
5580 1274
36
Seal, Polarity.
+/— 8424 0042
37
Knobs, Sliding. M320B4-1 K-0862
6907 0290
Page 26
Page 27
^ Cl
•01GS
Page 28
Page 29
Console
PCB
M3129
CN1M
Page 30
Page 31
RADIO SHACK,
A
DIVISION
OF TANDY CORPORATION
USJLx PORT WORTH, TEXAS 76102
CANADA: BARRIE, ONTARIO
L4M 4W5
TANDY
CORPORATION
mum* mm ux
91 KUtRAIONC
mNU( RU( BCS PICDS rAlHETTI. 39 99
II?
‘99933 BILSTDN I9AD WE0NESBU9T
MOUNT
9RUin. R.S.W.27?9 5I4Q NANINNE(HAMUR)
CEICT MNT9TSE CEDE*
WEST HIOUNDS VS 19
?
IN
8A6
PRINTED IN JAPAN
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