Technics RS-B105 Service Manual

RS-B105
Dolby NR circuit
1. Test equipment connection is shown in Fig 10.
2. Set a normal tape and apply 5kHz signal in record pause
mode.
3. Adjust by attenuator so that the output between terminal ©
(L-CH) {terminal @ (R-CH)} of 1C401 and ground is 12.3mvV.
4. Turn NR switch ON, and check that the level changes as
specified from the fevel in NR out mode.
Standard value: 8+ 1.5dB
m@ RESISTORS AND CAPACITORS
Notes:
1.
Part
numbers
are
indicated
on
most
mechanicat
parts.
3.
The
unit
of
resistance
is
OHM
(Q).
Piease
use
this
part number for
parts
order.
K=
10000, M=1000kQ
2.
Important
safety
notice.
4.
The
unit
of
capacitance
is
MICROFARAD
(yF).
Components
identified
by
A\ mark
have
special
charac-
P=10pF.
teristics Important for safety. When replacing any of these
components, use only manufacturer's specified parts.
Numbering System of Resistor Numbering System of a
Resistor Type Wattage
Capacitor Type Tolerance
: ECEA Tin rae |
: Carbon
at : Metal Oxide
ERC : Solid : £0.25pF
: Electrotytic 3 : 5%
; Ceramic : 6. : +10%
: Ceramic H : : +80%, ~20%
: Polyester ‘ : : +20%
: Polyester :
: Polyester
: Liquid electrolyte
double layer
capacitor
: Ceramic
wee.S.A.
Ail European areas except United Kingdom.
United Kingdom.
* [EGA] ...F.R. Germany.
R1,2
ERDS2TJ273
R
49,
50
ERDS2TJ272
R
403,
404
ERDS2TJ471
470
|
R705
ERODS2TJ472
4.7k
R3,4 R $1, 52 ERDS2TJ222 22k |R 405, 406 EROS2TJ473 47k | R 706, 707 ERDS2TJ154 150k
[EGA]
only
ERDS2TJ332
3.3k
R
407,
408
EROS2TJ562
5.6k
|
R
708
ERDS2TJ152
1.5k
R7,8
ERODS2TJ473
47k
|
R53,
54
ERDS2TJ183
18k
|R
409,
410
ERDS2TJ332
3.3k
|
R
802
EROS2TJ473
47k
R11,
12
EROS2TJ102
1k
|
R55,
56
ERDS2TJ391
390
[R
411,
412
ERDS2TJ102
1k
|
R
803
ERDS2TJ103
10k
R17, 18 ERDS2TJ472 4.7% | R57, 58 EROS2TJ391 390 R 804 EROS2TJ683 68k
R
19,
20
EROS2TJ101
100
|
R
61,
62
ERDS2TJ182
1.8k
R413,
414
ERDS2TJ274
270k
|
R807
EROS2TJ562
5.6k
R 23, 24 EROS2TJ101 100 | R 63, 64 ERDS2TI154 150k |R 418, 416 EROS2TJ184 180k | R815, 816 EROS2TJ103 10k
R
25,
26
ERDS2TJ225
2.2M
|
R
69,
70
ERDS2TJ103
1Ok
|R417,
418
EROS2TJ152
15k
|
R818
EROS2TJ102
1k
R 29, 30 EROS2TJ820 82 R419 ERDS2TJ512 §.1k
R
31,
32
ERDS2TJ334
330k
|
R81,
82
A
600,601
A
EROS2ZTJ102
1k
|
R900
ERDS2TJ392
3.9k
[EGA] only ERDS2TI182 1.8% | R 604, 605 R901 ERDS2TJ391 390
R 33, 34 ERDS2TJ682 6.8k | R 200 EROS2TJ271 270 [EK] only A ERQ14LKRS6 0.56 | R902
R 35, 36 EROS2TJ562 5.6k | R201 ERDS2TJ680 68 | A 606, 607 {EK] only ERO2FCJ4R7 47
R 37, 38 ERDS2TJ102 1k {EK] only A ERQ14LK2R2 2.2
R 39, 40 ERDS2TS103 10k | R202 ERD2FCG270 27 | R 700 ERDS2TJ561 560
R 41, 42 EROS2TJ222 2.2k | R 300, 301 ERDS2TJ8R2 8.2 | R701 ERDS2TJ562 5.6k
R 43, 44 ERDS2TJ153 15k | R 302, 303 ERDS2TJ683 68k | A 702 ERDS2TJ472 47k
R 45, 46 ERDS2TJ273 27k | R304 ERDS2TJ1RO
R 47, 48 ERDS2TJ682 6.8k ERDS2TJ242 R 703, 704 ERDS2TJ363
¢ CAPACITORS
C1,2
ECEA1CU100
10
|
C
35,
36
ECEA1HU010
1
|
C
403,
404
ECQB1H472JZ
0.0047
|
C
612
A
ECKD2HE82PE
0.0068
C9,
10
ECKD1H122KB
0.0012
|
C
37,
38
ECKD2H331KB
§
330p
|
C
405,
406 ECQV1H333JZ
0.033
|
C
701,
702
ECEAIHU2R2
2.2
C
ti,
12 ECKD1H681KB
6800p
|
C
39,
40
€CKD1H122KB
0.0012
|
C
407,
408 ECQM1H473NZ
Cc
703
ECKD1H223ZF
=:
0.022
C
17,
18 ECEAQJU101
100
|
C
41,
42
EC@B1H103JZ
0.01
2
¢ 800
ECEA1CU331
330
C
19,
20
ECEA1CU100
10
| C
43,
44
ECEA1HU010
1
|
C
409, 410 ECQV1H334NZ
0.33
C
21,
22
ECEA1CU100
10 |
C
47,
48
€CEAICU100
10
|
C
411,
412
ECQV1H104JZ
C 801
ECEA1CU331
330
C
23,
24
ECQB1H472JZ
“00047
|
C
49,
50
ECKD1H102KB
—_
0.001
c
802
ECEA1EU470
47
C
25,
26
ECEA1HU010
1
|
C
300, 301
ECFRIE222KAY
0.0022
|
C 600
A
ECEA1AU332
3300
C
27,
28
ECQB1H682JZ
(0.0068
Cc
601
A
ECEA1AU102
1000
C
29, 30
ECEA1HU010
1
1 C302
ECFD1IH6B2KD
0.0068
|
C
602
A
ECEAOJU101
100
C 303 ECKD1H332K8 0.0033 | C 603 A ECEAQJU471 470
C 31, 32 ECQB1H222JZ 0.0022 | C 304 ECEA1CU101 100 | C 604,605 A ECKD1H223ZF
C33, 34 ECQB1H822JZ C 305 ECQP1383JZ ; A ECKO1H2222F

Technics RS-B105 Specifications

General

Brand	Technics
Model	RS-B105
Category	Cassette Player
Language	English