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SCHEMATIC
DIAGRAM
MODEL
RS-646DS-D
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NOTE:
1 Sli
-Slda
Record/playback select switch (shown in playback position),
18. VR7. 8
Record level adjustment VR for NORMAL
tape.
2 $21
$24
Input select switch (shown in LINE position)
19. VRQ, 10 -s+-+--Record level adjustment VR for CrO2 tape.
ioe
3 $3.1-$3-4.
-+.-EQ select switch (shown in "120s" position)
20, VRID v0
-+-Level meter adjustment VR for Rech
MAISOLF
4 $41,542
Limiter ON/OFF switch (shown in OFF position)
21, VR12
soo-Battery level adjustment VR
i
:
8.
S51 S52
Dofby IN/OUT switch (shown in OUT position)
22. VRGQ1, 602 ----Record input level control
11202 288324
7201 2801383
UM-1x8
6 SE
Battery check switch (shown in OFF position)
23, VR603.---
Tone volume
7. 37
Bias Low/HIGH select switch (shown in Low position?
24. VRE04-----0---Speaker volume with speaker ON/OFF switch
TERMINATIONS (BOTTOM VIEW)
r
8
os
Mets light ich (shown in OFF position)
25. Resistor values are in ohms (11), 1/4 watt unless specified otherwise
280828 , 2SA584
2801568 , 2801847
288324
ibd
;
ee
Micro:
Rasitots
astises.
2SK30AD
2SA886
t
SM102.F
10
a
Motor ON/OFF: Micro-switci
t
Resistors indicatea thickly show printed type resistor,
|
I
e5
LL
SH -
AC/DC select switch
26. Capacitor values are in microfarads (uF) unless specified otherwise
310 |
Tr301
12. $12
Power arnplifier IN/OUT switen
P=Picofarads
|
fom
do
2SC1568
13. $13
Piay switcn,
27.
The mark (¥) shows test point.
e.g.
¥=Test point |
|
aK
|
14, $14 1, $14.2.--Muting switch {off at REC/PLAY poston)
28. All voltage vaiues shown in circuitry are under no signal condition with volume
Lo
be
|
15. S15
2 voltage selector switen
control at minimum position
16. VR1, 2
Playback tevel adjustment VR
For measurement, use VIVM
17 VR3. 4.5, 6
---Doiby NR adjustment VR.
29. For parts which are shaded (sis). only parts specified by the manufacturer
OE
ee
f
should be used for replacement sn critical circurt
19
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