Technics RS-M215

RS-M215 RS-M215
9. Switch the tape selector to Metal,
change test tape to QZZCRZ, and
record 50Hz, 100Hz, 200Hz, 500 Hz, 1 kHz, 4kKHz, 8kHz, 1OkKHz and 12.5kHz signals. Then,
playback the signals and check if the curve is within the limits shown in the overall frequency response
chart for metal tapes (fig. 17).
10. Confirm that bias currents are approximately as follows when the tape selector is set at different
positions.
ELECTRICAL PARTS LOCATION
E5
*
Read voltage on VTVM and calculate bias current by following formula:
Value read on VT VM (V)
10 (Q)
Bias current (A) =
around 410A (Normal position)
around 545A (CrO2 position) \ measured at TP1 (L-CH) and TP2 (R-CH)
around 800uA (Metal position)
@® Overall gain _ Test equipment connection is shown in fig. 18.
Condition: 2. Place UNIT into record mode, and tape selector to normal
Record/playback
head
i
* Record /playback mode position. :
+
Input
level
controls
---
MAX
3.
Supply
1kHz
signal
(—24
dB)
from
AF
oscillator,
through
pare
et
* Standard input level; ATT to LINE IN. ele LINE IN Tee MN” Test tape
MIC
«eeeeees
—72+4dB
4.
Adjust
ATT
unti!
monitor
level
at
LINE
OUT
becomes
Record/playbacky
ie
guy
LINE IN.-- -24+4¢B OAV. me
Equipment:
5.
Using
test
tape,
make
recording.
od
—fo
O_
7
=
VTVM
.
AE
cscillator
6.
Playback
recorded
tape,
and
make
sure
the
value
at
LINE
ie
tse
Playback
mode
yTym
Oscilloscope
i
Note:
Cord
connection
using
this
nylon
*
ATT
*
Oscilloscope
OUT
on
VTVM
becomes
0.4V.
Fig.
18
coupler
(E24)
requires
a
special
tool.
.
P
7.
If
measured
value
is
not
0.4,
adjust
VR5
(L-CH),
VR6
in
coupler
(E24)
* Resistor (600 Q)
* Test tape 8
(reference blank tape)
«++ QZZCRA for Normal
(R-CH) (See fig. 2 on page 3).
5
Nylon coupler .- Copper plate
.
Repeat
from
step
(2)
i
i (E24) ve Clamping
@
Fluorescent
meter
Note:
Condition:
RS-M215
cassette
decks
are
available
with
VR202
or
without
VR202.
For
models
with
VR202,
lighting
|
*
Record
mode
adjustments
at
—20dB
and
OdB
must
be
made.
For
those
without
VR202,
lighting
adjustment
is
* Input level controls --- MAX necessary only at OdB. If —20dB lighting adjustment is required for models without VR202, replace
* Tape selector R202 with an appropriate resistor.
- Normal position 1. Test equipment connection is shown in fig. 18.
Sees 2. Supply 1kHz signal (—24 dB) to the LINE IN then press the record button.
Se 3. Adjust the ATT so that the output level at LINE OUT becomes 0.4 V (The input level at this condition
*VTVM_ * AF oscillator ef id the’ standardinput level)
* ATT * Resistor (6002) fii nad ed tapas sro iat
4. Adjustment at “—20dB":
A. Adjust the ATT so that the input level is —20dB below standard recording level.
B. Adjust VR202 so that the —20dB segment -
lights
up
in
the
—20
+0.8dB
range
CL-CH
cS]
UVMAUEIUVTUTTITEELTITUET
TTT
TET
only)
(See
fig.
19).
wae
5, Adjustment at “OB”: a 74 2 29 00072 DE se at
A. Adjust the ATT so that the output level at Fig. 19
LINE
OUT
becomes
0.4
V.
A
LE
RL
Part
Name
&
Description
(The
input
level
at
this
condition
is
termed
shasesevaassana
sagen
saassvasss
taett
LOB)
DA
|SJASS
AG
Power
Gard
r
aT TCM
POUNPUNPUNP VAP UNE te
20
(FI)
6°4+2+0°*
2
O06
&
x For all European areas except United Kingdom.
B] A | QFC1205M "
% For United Kingdom. |
the standard input level.)
B. Adjust VR201 so that the +1dB segment
+ :
lights up in the 0 £0.2dB range of the Fig. 20 E? QTD1164 | Cord Clamper (for AC Power Cord)
standard input level (See fig. 20). Eg QTS1531 |Shield Plate
6. Repeat twice between steps (5) and (6) above. Seve (for AC Power Transformer)
7. Adjust ATT and check that all se ments li hts PI UTIUTAUIASEATELERAS ELS IASEEUSIEPIST Eri triers E9 XTN3+10B Screw 3X10
si L SHUNAUUUUTUNUT AUG U CHEAT UTLE REPEL ACEMENT. PARTS LIST. E10 |XTN3+16B Screw 43X16
up when an input signal level is increased to
10.dB higher than the standard input level (See 20 PEAR) 6 © 4+ 2+ 0° 2 10 <6 B= 11008)
fig. 21).
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.
|
Ell XWG3 Washer
E12 XSN3+6S 'Screw H3X6
E13 XWA3B Washer
E14 QML3711 Recording Lever
ee ; ae dog: TPS (L-CH)
® Dolby NR circuit 1. Test equipment connection is shown in fig. 22. ICLL-CH) oe RCH) viv a E15 BS1132 Recording Wi
Condition:
2.
Place
UNIT
into
record
mode,
set
the
Dolby
NR
switch
ee
For
hare
eee
—
lei
sro
Pincord
iti
IN
to
obtain
E17
A
|
QTF1054
Fuse
Holder
+
Record
mode
to
OUT
position
and
supply
to
LINE
ETHICAL
PATS
NR switch --- IN/OUT —34.5dB at TPS (L-CH), TP6 (R-CH) (frequency oe eseparie oo ee lee
* Dolby NR switc /OU El QWwY4122z Record/Playback Head E19 QTS1532 Shield Case
« Input level controls --- MAX 5 kHz). AFostiator— ATT E2 QWY21382 Erase Head QMA4060 Volume Angle
; 3. Confirm that the value at IN position is 8(+2.5)dB £3 | OMA4061 Center Angle
Equipment : greater than the value at OUT position of Dolby NR . E4 QG01798 Push Button (for Power ON/OFF) |E21 QNQ1004 Nut
*VTVM + AF oscillator aiiteh Fig. 22 E5 QKJ0437 Cord Clamper (for Pin Cords) £22 QNQ1070 "
«ATT
*
Oscilloscope
,
Geis
“Silver
Type”
E23
QJT1041
Check
Pin
*
Resistor
(600
Q)
QKJ0437K
»
A
|
QJT1079
Nylon
Coupler
“Black Type” |XTN3+12B ‘Screw 43X12 [6]