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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
LINE IN.-- -24+4¢B
OAV.
me
Equipment:
5. Using test tape, make recording.
od
— f o
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.
* 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
* 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
-
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
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
NR
s w i t c h --- 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]
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