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aa"
° VR4
: Input level control.
Pm
|
NO
OQ
°VRS.6
ae
:
RESISTORS
R 85
ERD20TJ100
CAPACITORS
INTEGRATED
CIRCUITS
| COILS
|
és
'
:
gain adjustment VR.
R 86. 87
ERD20TJ562
4
° VR7,8
: Bias current adjustment VR.
R1,2
ERD20TU562
R 88
ERD20TJ100
C1,2
ECKD1H821KB
| 1C1
M5219L
L1,2
| QLQX0343KWA Bias Trap Coil
e L1,2
: Bias trap coil.
R 3,4
ERD20TJ101
R 89
ERD207Tv471
C 3,4
ECEA1EU4R7
(OP Amp)
L3,4
QLM9Z10K
MPX Filter
cen
° 13,4
: MPX filter.
R5,6
ERD20Tu473
R 90
ERD20TJ271
C 5,6
ECEAQJU101
IC 2
AN6888
L5,6
ELM7Q306A _ Network Coil
ies
° L5,6
: Network coil.
R7,8
ERD20TJ820
R91
A ERD2FCG820
C7,8
-ECKD1H181KB | IC 3, 4
M5218L
L7
QLB0198KA _ Bias Oscillation Coil
oy
e L7
: Bias oscillation coil.
R 9, 10
ERD20TJ334
R 92
ERD20TJ123
. :
| EPeieuie
(OP Amp)
;
i
i
+g:
F
R11,
12
ERD20TJ682
R 93
ERD20TJ103
1,1
IC 5,6
TEA0665
e Resistance are in ohms
(Q), 1/4 watt unless specified otherwise.
'
'
1K = 1,000(2), 1M=1 mae
i
R 13, 14
ERD20TJ562
R 94,95 A ERD20TJ102
C 13, 14
ECKD1H821KB
(Dolby)
SPARK KILLERS
'
Gots
ous
.
R 15, 16
ERD20TJ104
C 31, 32
ECEA1HU010
,
|
e Capacity are in micro-farads (uF) unless specified otherwise.
R 17, 18
ERD20TJ222
1 R96
A ERD2FCJ4R7
C 33, 34, 35, 36
21,2
EXRP220K124T
* The mark (¥) shows test point.
e.g. W=Test point 1.
R 4
ERD20TJ223
R97
ERD20TJ390
ECKD1H223ZFD | TRANSISTORS
Q
1,2
mode with volume control at minimum position otherwise specified.
R 21,22 A ERD20TJ102
R100
A ERD2FCG100
Q3,4
2SD1450RST
TRANSFORMERS
a
ee Voltage values at record mode.
R 23
ERD20TJ562
|
©:39,40°
ECOMINSI2Z
165 6.7.8 9, 10,11. 12
ae
CHO,
ececeeee Voltage values at CrO, tape mode
R 39,40
ERD20TJ472
R 101, 102
C 41, 42
ECEA1HU010
2SC2603E
T 1 [D] A QLPD92EKC
— AC Power Transformer
Ww"
:
;
R41
ERD20TJ561
{D0} ERDS1FJ100
C 43
A ECEA1AU471
D592AR
T 1 ([B] A QLPA78EKC
— AC Power Transformer
0.
Metal ......... Voltage values at Metal tape mode.
ECEA1AU2214
Q 13
2SD59
Cr02/
R 42
ERD20TJ471
R 101, 102
C 44
Q 14
2SC1846RS
ora
Stop
......... Voltage values at Stop mode.
R 43, 44, 45, 46
[B] ERD2FCG100
C 45
ECQP1183JZ
015
DG Ad45
—
|
NRIN ......... Voltage value at which the noise reduction switch is turned on.
ERD20Tu222
C 46
ECEA1CU101
G46
RS
a
SWITCHES
|
039, 0.0033
:
For measurement use VTVM.
R 47, 48
ERD20TJ682
R 201, 202
ERD20TJ363
C 47
ECFDD153KVY
Q17
>SAB85RS
|
|
(_B+_)
indicates B + (bias).
R 49,50
ERD20TJ272
R 203, 204 ERD20TJ472
C 48
ECFDD822KVY | 6 48 149 20 28C2603E
S1
QSSA209
Slide iti ae (Recordi
° (_B—_)
indicates B — (bias).
R51,52
ERD20TUS60
R 205, 206 ERD20TJ154
C 50
ECEA1EU100
Gao
osGo60sE
Playback Selector)
es
eT Ea
,
R 53,54
ERD20TJ181
R 207
ERD20TU123
C 51,52
ECEA1AU221
$2,3,4,5,6
.
(ames) indicates the flow of the playback signal. (NR out).
A O08
EP EDOT i250
|
|
QSWX604T
Push Switch
© = ap s) indicates the flow of the recording signal. (NR out).
R 55, 56
ERD20TJ223
R 209
ERD20TJ471
C 53
A ECEA1CU102
S7
= A QSW2245T
Push Switch
* Important safety notice
ae
|
R 57,58
ERD20TI822
R 210
ERD20TJ122
C54
A ECEA1CU222
|p1
188133T
(Power ON/OFF)
Components
identified
by A mark
have special characteristics
important for
R 59, 60
ERD20TJ8R2
R 401, 402
ERD20TI242
C 55, 56
ECKD1H223ZFD
|p 2
MC921
S 8 [B]
A QSR1201H
AC Power Voltage
safety.
When
replacing
any of these components,
use only manufacturer's
R 61, 62
ERD20TJ473
R 403, 404
ERD20TJ562
C 57, 58
ECKD2H121KB
|p4
A MA4180L
Selector
ae
specified parts.
R 63,64
ERD20TU472
R 405, 406
ERD20TU332
C 59,60
ECQM1H102KZ
|p8,9, 10, 11
s9
QSWX604T
Push Switch
PHONES
¢ The part No. of diodes mentioned in the schematic diagram stand for production
:
EABe
ite
R407.
408
ERD20TS102
oy - A Se
Prat
D201
ne
be
oe Me ee
- bales withQmark the production part No. are different
R 69, 70
ERD20TJ121
R 409, 410
ERD20TJ333
C 201, 202
ECEA1HU2R2
:
i LN316GP
One FePiace ment Part
No:
.
R71,72
ERD20TJ153
R 411,412
ERD20TJ823
C 203
ECKD1H103ZF
| D 205, 206, 207, 208, 209, 210
Therefore, when placing an order for replacement part, please use the part No. in
R73
ERD20TJ103
R413, 414
ERD20TU821
C 301
ECEA1AU101
LN216RP
J
QJA0454C
Microphone Jack
the replacement parts list.
R 415, 416
ERD20TJ512
D 211, 212
LN316GP
J3
QJA0455C
Headphones Jack
¢ The supply parts number is described alone in the replacement parts list.
R74
ERD20TJ472
R 417, 418
ERD20TJ683
C 403, 404
ECQM1H472JZ
:
R 75
ERD20TJ104
R 419, 420
ERD20TJ222
C 405, 406
ECEA1CU100
D 213
LN216RP
()
ec
e This schematic
diagram
may
be modified
at any time with
R 76, 77
ERD20TJ103
R 421, 422
ERD20TJ823
me ie Soars
CONNECTORS
:
R 78
ERD20TJ104
R 423, 424
ERD20TJ272
;
the development of new technology.
R79,80
ERD20TJ103
R 425
ERD20TJ103
C 411,412
ECEASOMR68R
CN 1
QJP1921TN
3P Ps
'
C 413, 414
ECQM1H103JZ
CN 2
QJP1922TN
6 P
Plug
@ EQUIVALENT
CIRCUIT
R81
[D] ERD20Ty150
R 427
ERD20TJ223
C 415,416
ECQM1H472Jz
| VARIABLE RESISTORS
j|cn3
aqusig97s
3 P Socket
IC2: ANG6888
R81
[B}] ERD2FCG150
| R 428
ERD20TJ103
C 417, 418
ECEA1CU100
aa
UNMAADORO
CUS
QJS1961S
5 P Socket
.
R 429
ERD20TU223
C 419, 420
ECQM1H473JZ
,
G5X05G15
CN 5
QJS1993S
6 P Socket
R 82
ERD20TJ392
R 431, 432 ERD20TU331
C 421, 422 ECQV1H224uz
| VR3
EWANGS
CN6
QUT1090
Check Pin
VR4
EWAPB1X05A54
VR 5, 6
EVNM4AA00B54
VR 7, 8
EVNM4AA00B15
CN 7
QJS1987S
4 P Socket
CN 8
QJT1054
Contact
CN9
©
QJS1921TN
3 P Socket
CN 10
QJS1922TN
6 P Socket
C 423, 424
ECEAS50MR68R
C 425, 426, 427, 428
ECEA1CU100
C 430
|
ECEA1EU4R7
C 431, 432
ECQV1H224JZ
|
R 433, 434 ERD20TJ473
R83
[D] ERD20TJ150
R83
[B] ERD2FCG150
ERD20TJ1RO
Areas
*{D] For all Eulopean areas except United Kingdom.
* (B] For United Kingdom.
TERMINATIONS
Q14
2SC1846RS
REGULETOR
ie
6.3V
R100 10 | Q145'3y)
v
D201—204,
211, 212
LN316GP
| 0205—210,
213
LN216RP
Q1—12, 15—19,
401
* For United Kingdom.
* Input level control ...MAX
Cathode
Cathode
Anode
a
Cathet irate
Cathode
o5(Y
|
|
|
|
.
Anode
Boe
>
SPECIFICATIONS
* Balancecontrol...... Center
a
o
:
Bade: =
e e u
caste ok | can eck | cae tg on | Cao fos
)
|
Playback S/N ratio
_
D201—204,
* Test tape...QZZCFM
D1—3
D4
D5—11
O11, 212
IC2 AN6888
ES
LED DRIVE
7
Overall distortion
Sy D206
P'D204
Less than 4%
...QZZCRX for CrO
Mil METER CIRCUIT SECTION
...QZZCRZ for Metal
Cathode
Anode
Ca o—fg}—o A
"s
D205—210, 213
7
Overall S/N ratio
Greater than 43dB
[12]
|
* Test tape...QZZCRA
— _ |
(without NAB filter)
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