Technics RS-M206 Service Manual

RS-M206
1 2 3
SCHEMATIC DIAGRAM EQUIVALENT CIRCUIT
1C1 M5219L
ai, 2 03, 4 05,6 a7, 8
28D536F.) or 2sD626iR\S) or 250638(0,A.S) or 2SD836(%.6) oF 1C2 M5218L
28C2021 \ 1C3, 4 ‘ 2SC2021(Q,R,S) 1c2
A
o
MAIN
SECTION
[28C1685-Q]
Pty
NE646N
[2SC1685-Q]
[2SC1685-Q}
[2SC1685-Q}
MS5218L
PLAYBACK EQ/MIC AMP DOLBY NR REC EQ AMP METER & HEADPHONES AMP
Overall S/N ratio
Test tape --- QZZCRA
Greater than 43dB
hl [B+ (bias) 10V] (bias) 10V
Si-4 Sl-2 Cc:
0, O) J6 LINE OUT
PO OG > ry Mi ~raachd | POO SOE le : it)
RAS 470(144W) Ty
wee iit oy aa tev pnO 7 HEADPHONES SECTION ee abe nee
. C82
‘0 ~2oy 0.00r '
Bef
Ri
ay 2 4 Se toto} I 43
“HHo}} iz assay D)..----. For all European areas,
;
See
e
1
See
[N]
-+---+-+-
For
Asia,
Latin
America,
lormal . .
B : play [Cro, | ov | ov [o7v Middle East and Africa
Metal 0.7V
areas.
Ne 1 Ov
MlcN nec [cro, | ov | ov [orv [A] --------- For Australia.
1 (L-CH) = Metal 0.7V
bd
C81
ri i ero > ae ane SPECIFICATIONS « Input level controls-- MAX
6
|
RTT
39K
eam
Hy
cever
METER
SECTION
;
Nput
level
controls
.
OG
2
ETRE
J4
LINE
IN
(L-CH)
rT
F
I
By
(las)
10V
a
pan
mi
uy
|
E
|
cs
Playback
S/N
ratio
Greater
than
45
dB
PLAY -10.3V |-10.3V | -10.3V. ig é
1A] i bo5 ; 3 Wee $I-9 SII ®) ! Normal/REC | -9.7V | -3.5V|-10.0V Test tape eee QZZCFM (without NAB filter)
a an v ®) Metal/REC | -9.6V| +3.4V| -9.7V]
RECORD! 1 cy) <¥ ton bs ; ;
PLAYBACK
OTe
ton
thech
aiz
Overall
distortion
HEAD
(R-CH)
4
of"
METER
-
é
5
overs,
"Poa
bate
am
Tee
ree;
ea
ee
C rua & OAMOSMTA stoPt OV OV TOTV ***QZZCRA for Normal 7 — Less than 4%
-++ QZ7ZCRX for CrOz
+++ QZZCRZ for Metal
MIC IN
(ay
J2 (R-CH) iJ
6)
C2 1000P
R18
470K.
LINE IN te
C ® -
Oo
R78 3.9K(VaW) B~ (bias) ~10V A
SC Oo AC IN
J5 (R-CH) aa 16_33K
qd 7 at waiiiine 60 4 ¢ REGULATED POWER SUPPLY SI As nae
INTROL ) 2)
0) jek of bod [MUTING CONTROL ] aw 13.3 ° " I j gs
VR9
Sy
p19
agit
onne
D ie sf @ ar te = aay
@Q 4 ? (ea) * [A] ...[For Australia].
aa
cana
be
[8
Bo
jute
%
cance
OW wal a Baa
0.015
(i
Point
(B)
.
a
(K)
an
|
An
ERASE
HEAD
2
He
Skeioa
$10
R104
B-
mae
i
REO
o
|QwY21387] c bo ‘ “Tievi00
ein a a ace "ts °
i A aaa a ET SI
j BIAS OSC “103
€200 0.01 C200 0.01
. . _—— ® ——-. OO —_—_——_—_——. . —_—.
aint et REC INDICATOR ae on 4 ene * mole neh Ps ‘ {or=10., < tor et + [N] ...[For Asia Latin America,
? ,R,S) or x n areas.] ‘
asp ize or [ SECTION scaniOnS) ® zsasarni TescindeR a rend iaMt12) Middle East and Africa areas.}
[2SD592]
:
.
685-Q]
s?
88
1ON
2 | oe | | Bs O power suppty sectio!
MA1220MTA
€
.
MOTOR
[QXU0297]
[MA1220M]
DS
[LN220RP]
(RED)
NOTES:
¢ S1-1—$1-14......Record/Playback select switch (shown in playback position). * Resistance are in ohms (Q), 1/4 watt unless specified otherwise. * All voltage values shown in circuitry are under no signal condition. eg. Q1
© S$2-1—§2-4 ...... Input select switch (shown in LINE IN position). K = 1,0002, M= 1,000KQ. Unless otherwise specified, voltage measurement conditions are that tape 2SD636(R,S)—— Production parts number
© $3-1,S32......... Dolby IN/OUT select switch (shown in OUT position). * (We ) indicates printed resistor. travels is at STOP, tape mode at NORMAL, and Dolby NR switch at OFF. or 2SC2021S
© $4-1—S4-5 ...... Tape select switch (shown in normal position). A printed resistor is printed on the printed circuit board to be part of printed REG oss. ... Voltage at record mode. [2SC1685Q] ——Supply parts number
(@..Normal, @ ..CrO,, @)...Metal) patterns for circuit configuration. PLAY ... Voltage at playback mode. D7
...Power ON/OFF switch (shown in OFF position). * Capacity are in microfarads (uF) unless specified otherwise. RECI/PLAY ...... Voltage at record/playback mode. SM1A02T Production parts number
..[N] AC power voltage select switch. P = Pico-farads. Normal ......... Voltage at Normal tape mode. [SM112]————-Supply parts number
* For Asia, Latin America, Middle East and Africa areas. ¢ The mark (¥) shows test point. e.g. W = Test point 1. .. Voltage at CrO, tape mode.
Playback muting switch (shown in off position). © (SPM) this arrow indicates the flow of the playback signal. Metal ..Voltage at Metal tape mode. © The supply parts number is described alone in the replacement parts list.
....Fast wind muting switch (shown in off position). © (© QB) this arrow indicates the flow of the recording signal. * Described in the schematic diagram are two types of numbers; the supply r > : stn 3 7
..Playback gain adjustment VR. * Important safety notice parts number and production parts number for transistors and diodes. ¢ This schematic diagram may be modified at any time with
Input level controls. Components identified by A mark have special characteristics important for One type of number is used for supply parts number and production parts the development of new technology.
F Recording gain adjustment VR. safety. When replacing any of these components, use only manufacturer's number when they are idential.
© VR9,10 oo... Bias current adjustment VR. specified parts.
* Connection points (A) and (B)...... For erase current adjustment.

Technics RS-M206 Specifications

General

Brand	Technics
Model	RS-M206
Category	Cassette Player
Language	English