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NOTES:
¢ $1-1—S1-4
...... Record/Playback select switch (shown in playback position).
© $2-1—S2-2
...... Input select switch (shown in LINE IN position).
* $3-1—S3-2
...... Dolby IN/OUT select switch (shown in OUT position).
¢ $4-1—S4-5 ...... Tape select switch (shown in normal position).
AC power voltage select switch.
* For all European areas except United Kingdom.
Power ON/OFF switch (shown in OFF position).
Cue/Review muting switch (shown in off position).
0 SB. uiccetieosessnees Playback muting switch (shown in off position).
-Playback gain adjustment VR.
Input level controls.
© VR5,6
oo... Recording gain adjustment VR.
* VR101, 102
.Bias current adjustment VR.
e
VR201
0...
FL meter adjustment VR (for OdB indication)
© VR202
............ FL meter adjustment VR (for —20dB indication).
« Connection points (A) and (B)...... For erase current adjustment.
« Resistance are in ohms (Q), 1/4 watt unless specified otherwise.
K= 1,0002, M = 1,000KQ.
¢ Capacity are in microfarads («F) unless specified otherwise.
P = Pico-farads.
* The mark (¥) shows test point. e.g. ¥ = Test point 1.
* (==>) this arrow indicates the flow of the playback signal.
© (mmm ) this arrow indicates the flow of the recording signal.
* Ail voltage vatues shown in circuitry are under no signal condition and record mode
with volume control at minimum position.
For measurement, use VTVM.
¢ Important safety notice
Components identified by A mark have special characteristics important for safety.
When replacing any of these components, use only manufacturer's specified parts.
EQUIVALENT CIRCUIT
1C201
AN6870
(TOP VIEW)
3
Ic1, 2
DOLBY
B-TYPE
CIRCUIT
INTEGRATED
W112
13141
SPECIFICATIONS — * Input level controls--- MAX.
Playback S/N ratio
Test tape --- QZZCFM
Greater than 45dB
(without NAB filter)
Overall distortion
Test tape
Less than 4%
*+»QZZCRA for Normal
+ QZZCRX for CrOz
++ QZZCRZ for Metal
Overall S/N ratio
Greater than 43 dB
Test tape --- QZZCRA
NOTES:
RESISTORS
ERD --- Carbon
ERG --- Metal-oxide
ERS --- Metal-oxide
ERO --- Metai-film
ERX --- Metal-film
ERQ---
ERC.
ERF..--
Solid
Cement
Fuse type metallic
CAPACITORS
ECBA ------ Ceramic
ECGO
--.-- Ceramic
ECKO---.- Ceramic
ECC
.--- Ceramic
ECF
Ceramic
Polyester fiim
ECQE..-.-- Polyester
film
REPLACEMENT
PARTS
LIST
Important safety notice
N.-... Non polar electrolytic
enka y Polystyrene
+
Tantalum
Tantalum
ERD25FJ681
R201
' ERD25TJ153
R202.
@ ' ERD25FJ472
For ali European areas
type.
R203, 204 | ERD25TJ683
R205, 206 | ERD25TJ473
R207, 208, 209
| ERD25TJ105
R211, 212 | ERD25FJ181
R213
ERD25FJ103
R214
_ERD25FJ681
RESISTORS
ERD25FJ100
R3,4
| ERD25FJ562
R5,6
ERD25TJ104
R7,8
ERD25FJ101
R9, 10
ERD25TJ104
R11,12
| ERD25TJ823
R13,14
ERD25FJ101
R15,16
| ERD25TJ184
R17,18
| ERD25FJ392
R19,20
| ERD25FJ272
R21,22
| ERD25FJ562
R23,24
| ERD25FJ332
R25,26
| ERD25TJ473
R27,28
| ERD25FJ392
R29,30
| ERD25FJ102
R31,32
| ERD25TJ474
R33, 34
| ERD25TJ473
R35,36
| ERD25FJ332
R37, 38
| ERD25TJ105
R39,40
| ERD25TJ274
R41,42
| ERD25TJ184
R43,44
| ERD25FJ181
R45,46
| ERD25FJ272
R47,48
| ERD25FJ102
R49,50
| ERD25TJ683
R51,52
| ERD25TJ224
R53,54
| ERD25FJ822
R55,56
'| ERD25FJ681
R57,58
| ERD25FJ272
R59,60
| ERD25FJ102
R61,62
| ERD25FJ471
R63,64
| ERD25TJ223
R65,66
| ERD25FJ102
R67,68
— ERD25FJ3R3
R69,70
| ERD25TJ333
R71,72
| ERD25TJ273
R73,74
| ERD25TJ124
R75,76
| ERD25FJ151
R77
ERG2ANJ560
R78
ERDSOFJ270
R79,80
| ERG12ANJ820
R81, 82
ERD25FJ102
R83, 84
ERD25FJ222
R85
ERD25FJ102
R90
ERD25TJ563
R93
ERD25FJ102
R94
ERD25TJ153
R95
ERD251J223
R101
; ERD25FJ1RO
R102
ERD25FJ471
R103
ERD25FJ561
R104
ERD25FJ562
R105
ERD25FJ100
R106
ERD25FJ562
R107
ERD25FJ100
R108
ERDSOFJ101
R109
ERD25FJ101
R110
ERG2ANJ101
R112
ERD25FJ821
except United Kingdom.
* For —20dB indication (FL
METER) nonadjustable
QSSE203
$2,3
QES1544
$4
QES1490
S5
© A] QSR1409H
$6
A' QSWI117
: QSB0251i
TL
GA! QLPDS2EKC
A | QLPA61EKC
* For United Kingdom.
XBAQ0007
A
Ref. No.
|
Part No.
SWITCHES
VARIABLE
i
ECEAIAS101
RESISTORS | (67
ECEA2AS3R3
vR1,2
| EVNK4Aa00B24
|C69,70
| ECKD1H391KB
VR3,4
| QVH3AA067854
|C71
ECKD1H472MD
VR5,6
EVNK4AA00B54
For ~20dB indication (FL
VR101, 102 | EVNK4AA00B15,
METER) adjustable type.
VR201
—/ EVNK4AAQ0B24
|C101,102 | ECCDIM101KD
VR202
EVNK4AA00B14
{C103
ECQP1183JZ
%For —20dB indication (FL | C104
ECFDD153KXY
METER) adjustable type.
C105
ECEA1ES101
C106
ECFDD822KVY
SAPAGITORS §=— 10107, 108 | ECQV05104JZ
C1,2
ECEA25M4R7R
1C109,110 | ECEAICS471
C3,4
ECFOD102KVY
|C111, 112
C5,6
ECFDD102KVY
A | ECEAICS102
C7,8
| ECQM1H183KZ
|C201,202 | ECEA2AS010
C9, 10
ECEAIHS100
| C203
ECFOD473KXY
11,12
| ECEAQUS471 —- C205, 206]
ECKD1H223ZF
C13,14
| ECEA1ES220
C15,16
| ECKD2H121KBL | TRANSISTORS
C17,18
| ECFDDIOZKWY
|Q1,2
2SB745T
C19,20
| ECEAIHNO10 = 03,4
2SD661T
€21,22
| ECFDD392KVY
05, 6,7,8,9, 10
C23,24
| ECQM1H472J2
| 2506368
C25,26
ECEALHS100
«013
2SB641R
(27,28
| ECQM1H273/z
015
2SD636S
29,30
| ECEASOMR33R | Q101
2SD592NCR
€31,32
| ECQVvO5104s2 + Q102
| 25C1846-R
C33,34
- ECEA1HS100 '| Q103
| 25A885-0
C35,36
| ECFDD473KXY
37,38
| ECQM1H562J2
Se iieas
39,40
| ECEA1HS100
C41, 42, 43, 44
MAI61
C45,46
| ECEA2ASO19 ~—-| 9102
RVDIN4748
C47,48
| ECEAIHS100 —_| 0103, 104, 105, 106
C49,50
| ECQM1H333JZ
A|SM112
51,52
| ECFDDg22Kvy | 201,202 | MA161
C53,54
| ECFDD273Kxy_ | 9203
MA1047LF
(55,56
ECFDD333KXY | wwreGRaTED
(57,58
| ECEA1HNO10
CIRCUITS
C59,60 — : ECEA2ASO10
C61
| ECEALAS331
i :
ce
C62
ECEAIASIOZ
| coy
Aiueda
ECKD1H2232F
For ail European areas except United Kingdom.
TRANSFORMER
For all European areas except United Kingdom.
Part Name & Description
Slide Switch
(Record/Playback Selector)
Lever Switch
(Input Selector and Dolby IN/OUT)
Lever Switch (Tape Selector)
Rotary Switch (AC Power Selector)
Push Switch (Power ON/OFF)
Leaf Switch
(Cue/Review and Playback Muting)
AC Power Transformer
COILS
L1,2
QLQX0343K
'Bias Trap Coit
13,4
! SLM1Z19
: MPX Filter Coil
L5,6
"QLQX0332K
Peaking Coil
L101
, QLBO198K
: Bias Oscillation Coil
JACKS
Jl
| QUAO249C
"Headphones Jack
12,3
QJA0257H
Microphone Jack
J4
QJS1954H
Record/Playback Socket
FUSES
Fuse (T 400mA)
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