Technics RS-M226 - Page 14

RS-M226
IAGRAM
RECORD/PLAYBACK
HEAD
RS-M226
B- (bias) -7V |
B+ (bias) 7V
B- (bias)
-10V
B+ (bias) 7V
co
NNECTOR
SIGNAL OUT (L-CH) |
|
ols =
SIGNAL OUT (R-CH) |
PBs (blas)< 10M) 2s
B+ (bias) + 10V
MUTE
wlola] al
AC VOLTAGE
(to FILAMENT) j
[ELED CIRCUIT BOARD —
HEADPHONES JACK
CIRCUIT BOARD
B+ (bias) 10V
B- (bias) -13V
[J POWER SUPPLY CIRCUIT BOARD
Dito
BRN:
RED
‘ORG
T2: AC POWER TRANSFORMER
Bu
CAPSTAN MOTOR
S8: PLAYBACK SWITCH
gs | ae
lo)
LUG TERMINAL
(for MECHANISM)
ne0-@~O)
$7: FF/REWIND MUTING
SWITCH
ORG
AC POWER CORD
S5: POWER
ON/OFF SWITCH
B- (bias) -10V
...Black
.Blue
Brown
Gray
..-Green
...Light Blue
No Color Mark
.. Orange
Pink
-Red
-Shield Wire
WHT...... White
YEL...... Yellow
3 2 1
ia tes a1,2 TERMINATIONS
{M5219L] [M5219L] [2SD636] — _
1 | =0.04V (-0.02V) [ 1 [-0.03V (-0.03V) | B | -1.24V (-1.24v) STOP, CIR
2 | 0.04V (0.04V) 2 | 0.01V_ (0.01V) oe ee 0.74V
3 | 0.04V (0.04V) | 3 | 001V_ (0.01V) Cc] ov OV) OV
4 [-6.45V (-6.46V) | 4 | -6.74V (-6.73V) El 2 LONE a OV SONS]
5 [ 0.04V (0.04V) 5 | 0.01V (0.01V)
6 | 0.04V (0.04V) 6 | 0.01V_ (0.01V) spas] A
7 | -0.04V (—0.02V) 7 [| =0.03V (—0.03V) ot NER OSM tn 2
8 | 663V (673v)| | 8 | 692V (7.00V) B | OV (OV) S102 Metal
Cc [OV (OV) OV
iNEBRANI [E | Ov (OV) ov
1 OV (OV) - 13 | 6.94V (6.94V) Q5, 6
[| 2 | 004V (0.04V) ___[ 14 | 0.05V (0.02) | [2SD636]
3 | 0.02V_ (0.02V) 15 [-0.04V (0.02V) po STOP
4 | -6.32v (-6.32v) B: ~344Y| 46 | -o.05v (-0.01V) B. [20.70N. (OY) oi75v.
[ 5 | 0.08V (0.03V) 17_|-6.76V (-6.83V) | - By on oe |
[6 | 0.05V (0.02V) : 18 | 0.05V_ (0.02V) L
[7 OV (OV) 19 | 0.05V (-0.01V) Q7
8 | -0.04V (-0.01V) 20 |-0.05V (0.02V) [2SD636}
9 | -0.01V (-0.01V) 24 OV (OV) | B | 1021V (10.28)
10 | -0.04V (-0.02V) 22 ov ov) © | 20.45V (-0.30V)
11 | -0.04V (-0.01V) 23 V ( 7 =
12 | 6.85V (-6.69V) 24] OV (Ov) | EL 8ST 998M) | B
Qs
IC5, 6
9 [2SB641]
[NE652N] = B | -5.57V_ (-5.63V)
1 [-0.05V (0.02V) | 10 OV (OV) zt C | -10.17V (-10.27V)
2 | 0.05V (-0.01V) | 11 ov (OV) E = (-)
3 OV _(0.03V) | 12 OV (OV)
4 ov (OV) | 13 | 6.94V_ (6.94V) i ag
5 | -6.83V (-6.83V) | 14 | -6.32v (-e.32v) B “3 44¥ [2SD636]
6 ov. ov| 1s} ov ov) 7 bat es ey
7 ov. (Ov) | 16 ov OV) E1028 F-10540)
8 | -0.04V (0.02V) | 17 ov QV), [ites fie Nee SAV)
9 | 0.05V (-0.02V) | 18 ov (OV) il aio
IC7 ; __ [28D592]
[M5218L] B =9.89V (-10.36V)
1]. ov OV) C | -4.49V (-10.36V) ihe ay
2+}, 001V (OV) E | -10.13V (-10.36V)
3 0.01V (OV) C
4 | -12.54V (-13.20V) Qi1
2: 5 ay ae [2SB641]
. os ov, B | 1246v (13.281) {SRY
8 | 13.07V__(13.75V) C | =0.20V (-0.20V) 12.70V
[E | 12.46V (13.28V) 12.75V
Ics ac
[AN6870N] Q12
1 [-10.27V (—10.35V) | 15 [ -10.44V (—10.23V) | [2SD636]
2 | -7.72V_(-7.80V) | 16 | -10.14V (-10.23V) B ov ov) STOP
3 | 10.42V (10.64V) | 17 | —10.15V (-10.24V) | 0.64V
4 | -0.46V_(-0.38V) | 18 |~10.15V (-10.24V) C | 12.4aV (13.30V) 0.01V
5 | -0.47V (-0.40V) | 19 | -10.15V (-10.24V) | LE OV __(0V) Ov
6 | -10.15V (-10.32V) | 20 | —10.15V (—10.24V) 3
. 7 | =10.16V (-10.24V) [24 | -10.15V (-10.25V) | ened
8 | -10.15V (—10.24V) | 22 | -10.15V (-10.25V) .
9 | -10.15V (10.24) [23 [—10.15V (-10.25V) | B 12.53V (1235) STOR,
10 | -10.15V (-10.23V) [24 | -5.61V (-5.68V) 6 12i00V G107V) 12.0V D
11 | -10.16V (-10.24V) [25 | 5.28V (5.52V) | rE 172.53V (13.30v) 72. 15V
12 | -10.16V (-10.25V) | 26 | -6.87V (-6.98V)_ 2
13 | -10.15V (-10.24V) | 27 | -8.43V (-8.51V) | Qi4
14 | -10.15V (-10.24V) | 28 | ~8.43V (-8.50V) [2SC1846R]
(B | 19.16V (11.34V)
re 12.74V (13.50V)
|_E | 10.46V (10.65 V)
Q15
[2SA885Q]
B | -11.01V (-11.04V) Q14 Q15
C | -12.23V (-13.14V)
E [-10.31V (-10.38V)
NOTES: Cathode
* The circuit shown in#3333 on the onductor indicates printed circuit on
the back side of the printed circuit board. Cao—f@q—o a E
* Values indicated in[____] are under no signal condition.
Unless otherwise specified, voltage measurement conditions are the tape Di—6, 8—11, 17, 18
travel is at STOP, tape mode at NORMAL, and Dolby NR switch at OFF.
REC ... Voltage at record mode.
PLAY ...Voltage at playback mode.
RECI/PLAY
......
Voltage
at
record/playback
mode.
cao—(t}-0
A
Normal -Voltage at Normal tape mode. Ss
CrQ,.. -Voltage at CrO, tape mode. Cathode
Metal
Voltage
at
Metal
tape
mode.
Anode
STOP .... ... Voltage at STOP mode.
CIR
..
...
Voltage
at
Cue/Review
mode.
D7
Bina te ...Voltage at Dolby-B mode.
GQotvexsat in tee Voltage at Dolby-C mode.
For measurement, use VTVM. Cathode
¢
The
supply
parts
number
is
described
alone
in
the
replacement
parts
list.
|
Anode
F
¢ This circuit board diagram may be modified at any time
with the development of new technology.
Cao—fq—o A
D13—16