Technics RS-B14 User Manual

YTES-
17 $1-1$1-9: Record/playback switch (shown in playback position).
2 $2-1~S2-4: Input select switch (shown in line in position).
s3 : Dolby NR switch (shown in OFF position).
54-1,54-2 : CrO, tape select switch (shown in OFF position).
55-1,55-2 : Normal tape select switch (shown in OFF position).
56 : FF/CUE/REW/REV switch (shown іп OFF position).
Ё 57 : Power ON/OFF switch (shown in OFF position).
58 : Dolby В * С NR selector (shown in Dolby B position).
VR1,2 : Playback gain adjustment VR.
VR3 : Balance control.
VR4 : Input level control.
VR5,6 : Overall gain adjustment VR.
VR7,8 : Bias current adjustment VR.
VR9,10 : FL meter adjustment VR.
L1,2 : Bias trap coil.
36. 13,4 : MPX filter.
. L7 : Bias oscillation coil.
Resistance are in ohms (Q), 1/4 watt unless specified otherwise.
1K=1,000(Q), 1M = 1,000k(9).
Capacity are in micro-farads (uF) unless specified otherwise.
All voltage values shown in circuitry are under no signal condition and
playback mode with volume control at minimum position otherwise
specified.
Voltage values at record mode.
.-Voltage values at CrO, tape mode.
..Voltage values at Metal tape mode
.. Voltage values at Stop mode.
For measurement use-VTVM.
+В ) indicates B + (bias).
В ) indicates В- (bias).
) indicates the flow of the playback signal. (NR out).
(ae) indicates the flow of the recording signal. (NR out).
Тһе part No. of transistors, ІС and diodes mentioned in the schematic
diagram stand for production part No. Regarding the part No. with о mark,
the production part No. are different from the replacement part No.
Therefore, when placing an order for replacement part, please use the part
No. in the replacement part list.
QUIVALENT CIRCUIT
201, 202: BA6146
Voltage value at which the noise reduction switch is turned on.
ж Input level control ...MAX
* Balance control...... Center
Overall distortion
* Test tape
..QZZCRA for Normal
...QZZCRX for CrO,
..QZZCRZ for Metal
Overall S/N ratio
ж Test tape... QZZCRA
Less than 3.5%
CrO2, Metal......
Less than 4%
Greater than 43dB
(without NAB filter)
B ELECTRICAL PARTS LIST
NOTES: RESISTORS CAPACI
Carbon
...Metal-oxide
...Metal-oxide
...Metal-film
Metal-film
REPLACEMENT PARTS LIST
Important safety notice
Components identified by A mark have special
characteristics important for safety Fuse type metallic
When replacing any of these components, use mw OOO
only manufacturer's specified parts ERF ы Cement
ee mee CE SC тшш —
RESISTORS ERD25FJ100 C 9, 10 ECQM1H103JZ
À A 87 ERD25FJ562 C 11, 12 ECEA1CU100
В 423, 424 ERD25FJ392 С 407, 408 ECQM1H473JZ
R 67, 68 ERD25FJ102
R 425 ERD25FJ103 С 409, 410 ECQM1H224JZ
А
Te
n
ЕМЕН
В
426
ERD25TJ563
С
411,412
ECEA50ZR68
В 73 ERD25FJ103 R 427 ERD25TJ223 С 413, 414 ECQM1H 103JZ
R74 ERD25F J472 R 428 ERD25FJ103 C 415, 416 ECQM1H472JZ
R75 ERD25TJ104 R 429 ERD25TJ223 C 417, 418 ECEA1CU100
R 76, 77 ERD25FJ103 C 419, 420. ECQM1H473JZ
CAPACITORS С 421, 422 ECQM1H224JZ
5 n 80 Бетіне С 423, 424 ЕСЕА502868
R 81 ERD25FJ150 C12 ECKD1H821KB | С 425, 426, 427, 428
R 82 ERD25FJ392 C 3,4 ECEA1EU4R7 ECEA1CU100
R 83 ERD25FJ150 C5,6 ECEAOJU101 С 429, 430 ECEA1EU4R7
R 84 ERD25FJ1R0 C:7,8 ECCD1H181K | С 431, 432 ECQM1H224JZ
TERMINATIONS
1
ІС1, 3,4
. ^ Cathode
E
Cac—t4¢—
А
Q3~12,
18,
19,
D1,
3,
6,
307,
401
313
Anode
сыпев
е
p.
d
Cathode
Сао----<А
Сао----А
D4 D8~11
Marking
#7;
55
456
ЕСВА
ECG
ECKG
ECCG
ЕСЕП
ЕСОМ
Ref. No
INTEGR
R3,4 ERD25FJ101 R 88 ERD25FJ100 С 13, 14 ECKD1H681KB ІСІ
R5,6 ERD25TJ473 R 89 ERD25FJ471 C 31, 32 ECEA1HU010 163,4
R7,8 ERD25FJ820 R 90 ERD25FJ271 C 37,38 ECQMIHEBZ |1656
R 9, 10 ERD25TJ334 R91 ERD25FJ390 C39,40 ECQMIH332/Z |16242
R11,12 ERD25FJ682 R92 ERD25FJ562 C41,42 ECEA1HU010 :
R 13, 14 ERD25FJ562 R 93 ERD25TJ333 C 43, 44 ECEA1AU471 TRANSI
В 15,16 ERD25TJ104 R 94,95 A ERD25FJ102 C 45 ECQP1183JZ
R 17, 18 ERD25FJ222 R 96 À ERD2FCJ4R7 C 46 ECEA1CU101 a 1,2
R19.20 ERD25TJ223 R 97 ERD25FJ820 |C47 ECFDD153KXY | 34
R21 ERD25FJ103 R 100 ERD25FJ182 C 48 ECFDD822KVY Q 5 6.7
R 101, 102 C 50 ECEA1CU100 '
R22 ERD25FJ102 À ERDS1FJ100 С 51,52 А ECEA1AU221 Q 13
R 25, 26 ERD25F J102 R 203, 204, 205, 206 C 53, 54 A ECEA1CU222 Q 15
R 43, 44, 45, 46 ERD25FJ103 |С 56,58 — ECKDIH2237F | Q16
к ERD25FJ222 R 209 ERD25FJ102 017
R 47, 48 ERD25FJ682 В 401, 402 ERD25FJ242 C 57, 58 ECKD2H121KB Q 18, 19
R 49, 50 ERD25FJ272 R 403, 404 ERD25FJ562 С 59, 60 ECQM1H102JZ Q 401
R 51, 52 ERD25FJ560 В 405, 406 ERD25FJ332 С 63, 64 А ECKD1H223ZF
В 53, 54 ERD25FJ181 R 407, 408 ERD25FJ102 С 201, 202 ECFDD563KXY DIODES
R 55, 56 ERD25TJ223 R 409, 410 ERD25TJ333 С 203, 204 ECEA1CU100
В 57,58 ERD25FJ822 R 411,412 ERD25TJ823 C 205, 206 ECKD1H471KB D 1
R 59, 60 ERD25F J8R2 R 413, 414 ERD25FJ821 C 301 ECEA1CU101 D2
4 R 415, 416 ERD25FJ512 C 302 ECKD1H103ZF D3
R 417, 418 ERD25TJ683 C 401, 402 ECCD1H820K
d 2) = en ee R 419, 420 ERD25FJ222 |С 403, 404 ECQM1H472UZ В :
ERD25FJ472 В 421,422 ERD25TJ823 С 405, 406 ЕСЕА1С1/100 D 8, 9, 10
VR 9, 10.

Technics RS-B14 Specifications

General

Brand	Technics
Model	RS-B14
Category	Cassette Player
Language	English