Teac EQA-220 User manual

TEAC
EQA-220
Graphic
Equalizer
¢—cemeammmnmrany
~~
or
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memcemnmrencmrner
er
SERVICE
MANUAL
EQA-220/EQA-110
Graphic Equalizer
NOTES
@ PC boards shown are viewed from parts side.
@ Parts marked with * require longer delivery time.
@ The parts with no reference number or no parts number in the
exploded views are not supplied.
@ As regards the resistors and capacitors, refer to the circuit
diagrams contained in this manual.
@ A\ Parts marked with this sign are safety critical components.
They must be replaced with identical components - refer to
the appropriate parts list and ensure exact replacement.
@ Parts of [ ] mark can be used only with the version designated.
[EX/T]: U.S.A. and GENERAL EXPORT [C]: CANADA
[GE]: GENERAL EXPORT [E]: EUROPE
Effective
:
March,
1993
570464300
$02

:QA-220/EQA-110 |
1. SPECIFICATIONS
EQA-220
Number of Channels: 2
Number of Bands: 10
Center Frequencies:
30, 60, 125, 250, 500, 1k, 2k, 4k, 8k, 16kHz
Boost/Cut Range: +12 dB
Input :
Impedance: 47 k ohms
Nominal Level: 0.3 V
Outputs:
impedance: 1 k ohms
Maximum Level: 6 V
Frequency Response*: 10 Hz ~ 100 kHz, +1 dB
Total Harmonic Distortion: 0.01 %
Signal-to-Noise Ratio*: 90 dB (IHF A Weighted)
Power Requirements:
115/230 V AC, 50/60 Hz
(U.S.A./General Export Model)
120 V AC, 60 Hz (Canada Model)
230 V AC, 50 Hz (Europe Model)
240 V AC, 50 Hz (U.K./Australia Model)
Power Consumption: 12 W
Dimensions (W x H x D):
435 x 83 x 213 mm (17-1/8" x 3-1/4" x 8-3/8")
Weight (net): 2.7 kg (5-15/16 Ibs.)
Standard Accessories:
RCA pin-plug cords
EQA-110
Number of Channels: 2
Number of Bands: 10
Center Frequencies:
30, 60, 125, 250, 500, 1k, 2k, 4k, 8k, 16kHz
Boost/Cut Range: + 12 dB
Input :
Impedance: 47 k ohms
Nominal Level: 0.3 V
Outputs:
impedance: |] k ohms
Maximum Level: 6 V
Frequency Response®*: 10 Hz - 100 kHz, +1 dB
Total Harmonic Distortion: 0.01 %
Signal-to-Noise Ratio*: 90 dB (IHF A Weighted)
Power Requirements:
115/230 V AC, 50/60 Hz
(U.S.A./General Export Model)
120 V AC, 60 Hz (Canada Model)
230 V AC, 50 Hz (Europe Model)
240 V AC, 50 Hz (U.K./Australia Model)
Power Consumption: 8 W
Dimensions (W x H x D):
435 x 83 x 213 mm (17-1/8" x 3-1/4" x 8-3/8")
Weight (net): 2.5 kg (5-1/2 Ibs.)
Standard Accessories:
RCA pin-plug cords
* Measured with the equalizer sliders set to center-flat
frequency response.
@ Improvements may result in the specifications and
feature changing without notice.
@ Illustrations may differ slightly from production models.

EQA-220/EQA-110
2. PC BOARDS AND PARTS LIST
MAIN PCB
Coot
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BO cyan C808 4 COB bet
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R155 C=) 10K oR 3
26° iia
one
R251) 12K
R2GC—) 10K
RB2C— 47K
S emnmanenaiaanl
4]K
C226
R20
R228 pots
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R234 eee Bane’ aS»
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R203 oa
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R233
11K
C247
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IK
C106 00:
PIA OK
RIG3 390
R122 68K
C—S-
R128 10K
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R11 11K
R26
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QA-220/EQA-110
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DISPLAY PCB (EQA-220)
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EQA-220/EQA-110
MAIN
PCB
ASSY
(EQA=220)
DISPLAY
PCB
ASSY
(EQA=220)
REFe
NO.
PARTS
NO.
DESCRIPTION
REF.
NO.
PARTS
NO.
DESCRIPTION
*9A04291400
MAIN
PCB
ASSY
I[EX/T,GE,C]
*9A04330200
DISPLAY
PCB
ASSY
¥*9A04291420
MAIN
PCB
ASSY
[E]
D303-312
9A04162200
DIODE,
IK60
9A04296500 PLATE, EARTH A Q30) 9A04162300 TR, 2SD!450S
C401
A
9A04171900
C,
ELEC
!000UF/35V
Q30
2-3
|
|
9A03979200
TR,
2SC1815GR
C409
A
9A04!171800
C,
ELEC
I!000UF/I6V
U301-303
9A04162100
IC,
NJM2902N
D40
1-403
A
9A04166700
DIODE,
|N4003
U304-306
9A04162000
IC,
TC4066BP
D405
A
9A04166700
DIODE,
IN4005
U307,308
9A04161800
IC,
BA6I24
D406
9A04166800
DIODE,
RD5S.1E
U309
9A04161900
IC,
TC40!17BP
D407 9A04166700 DIODE, IN4003
D410~-413 A, 9A04166700 DIODE, IN4003 [EX/T,GE,C]
JS 9A04167200 JACK, RCA 4P YKC21-0349 VR PCB L ASSY (EQA=220)
I5Z 9A04167300 JACK,RCA 4P YKC21-O0I18A
QIOl=110 9A04166900 TR, 28C732TM REF. NO. PARTS NO. DESCRIPTION
Qtti,211 9A04!67100 TR, 2SDI450S
Q201=-210 9A04166900 TR, 25C732TM *9A04330800 VR PCB L ASSY
R!1O0-19 9A04167500 VR, SLIDE 250K
Q401,402 9A04!167000 TR, 2SAIOI5GR 9A04167700 LED, 3534HD
$33 9A04166400 SW, PUSH PBS-KS-002A
$40 | Ay 9A04166100 SW, PUSH SPUFI2SE07-TK
UlLOl,201 9A04166500 IC, NJM4560D
U40 I A 9A04166600 IC, NJM/824A VR PCB L ASSY (EQA-110)
REF. NO. PARTS NO. DESCRIPTION
MAIN PCB ASSY (EQA~1 10) ¥9A04329900 VR PCB L ASSY
<< — wa R10=—19 9A04167500 VR, SLIDE 250K
REFe NO. PARTS NO. DESCRIPTION
*9A04291300 MAIN PCB ASSY [EX/T,GE,C]
*9A04291320 MAIN PCB ASSY [E] VR PCB R ASSY (EQA=220)
9A04296500 PLATE, EARTH A
C401
4
9A04171900
C,
ELEC
IOO0UF/35V
REF.
NO.
PARTS
NO.
DESCRIPTION
0401-403 A 9A04166700 DIODE, I|N4003
*9A04330900 VR PCB R ASSY
D405
A
9A04166700
DIODE,
|N4003
R20~-29
9A04167500
VR,
SLIDE
250K
D406
9A04166800
DIODE,
RD5S.IE
9A04167700
LED,
3534HD
D407
9A04166700
DIODE,
IN4003
134 9A04167200 JACK, RCA 4P YKC21-0349
ID2 9A04167300 JACK, RCA 4P YKC21-O0!18A
VR PCB R ASSY (EQA=110)
QIOl-110 9A04166900 TR, 2SC732TM
Q1It,2il 9A04167100 TR, 2SDI450$ REF. NO. PARTS NO. DESCRIPTION
Q201-210 9A04166900 TR, 2SC732TM
Q401,402 9A04167000 TR, 2SAIOI5GR *9A04330000 VR PCB R ASSY
S3l 9A04166200 SW, PUSH PBS=-22LP3~F 18 R20-29 9A04167500 VR, SLIDE 250K
Soe 9A04166300 SW, PUSH PBS-42LP3-F 18
S40 | A 9A04166100 SW, PUSH SPUFI|2SE07-TK
UlOt,201 9A04166500 IC, NJM4560D
U40| 4 9A04166600 IC, NJM/824A
LED PCB ASSY (EQA=110)
REF. NO. PARTS NO. DESCRIPTION
¥9A04330100 LED PCB ASSY
D301 9A04167900 LED, 333AD (ORENGE)
D302 9A04167800 LED, 33310C (RED)

'QA-220/EQA-110
3. EXPLODED VIEW AND PARTS LIST
po — a eH HH ae
EQA-220
(
| f !
i
° p
re
EQA-220 |

REF. NO.
|
2
PP BPBPBP
oO Oo ~]
A
A
A
10 A
lt A
13
14
15
16
17
18
19
20
21
22
23
3 |
32
33
34
35
36
aT
38
39
PARTS NO.
¥*9A04 156200
9A04 156900
9A0415 7000
9A04157100
9A04 157200
9A04 157300
9A04157400
9A04157500
9A04157600
¥*9A0429 1300
¥9A0429 1320
¥9A0429 | 400
¥9A04291420
¥9A04330 100
¥9A04330200
¥9A04 156600
¥*9A04 156700
¥9A04 156800
¥*9A04 159600
9A04 158200
¥*9A04 156300
¥9A04309600
*9A04309700
¥*9A04309800
¥9A04309900
*¥9A043 10000
*#9A043 10100
*9A043 10300
¥9A04 16 1 700
*9A04 157800
¥9A04 157700
¥*9A04 156400
*9A04 156500
*9A0429 1000
9A04 158000
9A04158100
*9A04 157900
*9A043 10400
9A04291 100
9A04 158300
*9A04330800
*9A04329900
*9A04330900
¥9A04330000
*9A04 158600
*9A04 158700
*9A04 159000
¥9A04 158900
*9A04 158800
¥*9A04 159300
*9A04 159100
*9A04 159200
*9A04 159400
INCLUDED ACCESSORIES
REF e NO.
PARTS NO.
*9A04 160500
*9A0407 1200
*9A0412 1600
*9A0407 | 300
¥#9A04121700
DESCRIPTION
BONNET
TRANS .
TRANS.
TRANS»
TRANS.
TRANS.
TRANS.
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MAIN PCB ASSY
MAIN PCB ASSY
MAIN PCB ASSY
MAIN PCB ASSY
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CHASSIS, MAIN
CHASSIS, MAIN
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EMBLEM, TEAC
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FOOT ASSY
FOOT, FF=025
VR PCB L ASSY
VR PCB L ASSY
VR PCB R ASSY
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SCREW, CAP-S T3*6 (BLK)
SCREW, C=TITE T3*8 (BLK)
SCREW, BTT=S
SCREW, CAP=S
SCREW, PTT-P
SCREW, BTT=S
SCREW, BIT-P
SCREW, BTT=S
SCREW, BTT=S
DESCRIPTION
Tors
T3760
T3*8
F3*6
pos
T4*8
T3*10
RCA PIN-PLUG CORDS
EQA=110 OWNER'S MANUAL (MULTI. »)
EQAm110 OWNER'S MANUAL (ENG. /SPANI SH)
EQA=220 OWNER'S MANUAL (MULTI.)
EQA=220 OWNER'S MANUAL (CENG./SPANI SH)
REMARKS
EQA~110 C
EQA@ 110 E
EQA-220/EQA-110
EQAm110 EX/T, GE
EQA=220 C
EQA=220 E
EQA=220 EX/T,
EQA~ 220
EQA~1 10
EQA~!10 EX/T,
EQA-II0 E
EQA=220 EX/T,
EQA=220 E
EQA~110
EQA-220
EX/T, C
GE
E
EX/T, GE
EQA=110 EX/T
EQA-110 C
EQAwI10 E
EQA=|10 GE
EQA=220 C
EQA= 220 E
EQA-220 GE
EQA=220 EX/T
EQA=220
EQA~ 220
EQA= 110
EQA-220
EQA~220
EQA=110
EQA=1 10
EQA- 220
EQA*220
EQA- 110
EQA~220
EQA-110
REMARKS
GE
EQA-110 EX/T
EQA=220 C, E, GE
EQA=220 EX/T

‘(QA-220/EQA-110 |
IC BLOCK DIAGRAM
BA6124
Di D2 D3 D4 GN DS AMP OUT IN Vec
5. BLOCK DIAGRAMS
EQA-220
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LINE
IN
|
2
TAP
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| =
CIRCUIT
EQUALIZER
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EQA-220/EQA-110 EQA-220/EQA-110
6.
EQA-220
SC
H
E
MATI
C
D
|
AG
RAM
INSTRUCTIONS
FOR
SERVICE
PERSONNEL
BEFORE RETURNING APPLIANCE TO THE CUSTOMER, MAKE LEAKAGE-
CURRENT OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT.
Ad
Parts
marked
with
this
sign
are
safety
critical
components.
They
must
always
be
replaced
with
idential
components
-
refer
to
the
TEAC
paret
list
and
ensure
exact
replacement.
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7. EQA-110 SCHEMATIC DIAGRAM
EX MODEL UK/ A. 240V
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A Parts marked with this sign are safety critical components. They
> Europe only must always be replaced with idential components - refer to the TEAC
paret list and ensure exact replacement.
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BEFORE RETURNING APPLIANCE TO THE CUSTOMER, MAKE LEAKAGE-
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EQA-220/EQA-110

EQA-220/EQA-110
TEAC.
TEAC CORPORATION Musashino Center Bldg.,1-19-18, Nakacho, Musashino-shi, Tokyo 180, Japan Phone:[phone]
TEAC AMERICA, INC. 7733 Telegraph Road, Montebello, California 90640 Phone: [phone]
TEAC CANADA LTD. 340 Brunel Road, Mississauga, Ontario L4¢Z 2C2, Canada Phone:[phone]
TEAC UK LIMITED ‘5 Marlin House, Marlins Meadow, The Croxley Centre, Watford, Herts. WD1 8YA, U.K. Phone:[phone]
TEAC DEUTSCHLAND GmbH Bahnstrasse 12, 6200 Wiesbaden-Erbenheim, Germany Phone:[phone]
TEAC FRANCE S.A. 17, Rue Alexis-de-Tocqueville, CE 005 92182 Antony Cedex, France Phone: ({1)42.37.01.02
TEAC BELGIUM NV/SA 143C Woluwelaan, 1831 Machelen-Diegem, Belgium Phone:{02)725-6555
TEAC NEDERLAND BV Perkinsbaan 11, 3439 ND Nieuwegein, Nederland Phone:[phone]
MeN oe aeaee LTD. 106 Bay Street, Port Melborne, Victoria 3207, Australia Phone: [phone]
TEAC ITALIANA S.p.A. Via C. Cantt 5, Cinisello Balsamo, Milano, Italy Phone:[phone]
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PRINTED IN JAPAN 0393SK 0.58 M-0794A