Matsushita Electric PANASONIC RS-260US User manual

Service Manual cues
COMPACT, FULLY EQUIPPED
STEREO CASSETTE TAPE DECK
RS-260US MECHANISM SERIES
move. RS-260US move. RS-260USE
SPECIFICATIONS
Power Source: AC: 90~109, 110~125, 200~219, Frequency Response: NORMAL 40~11,000 Hz
220~250 volts, 50/60 Hz CrOz 40~13,000 Hz
Power Consumption: 6W Signal-To-Noise Ratio: Better than 43 dB
Motor : Electronic speed control DC motor inputs: 2-MIC —~71 dB (0.3 mV)/10KQ
Transistors : 28C1327 (2) 2SC644 (2) 2-LINE —29 dB (30 mV)/100 Ka
28C828(2)
2SA102AA(2)
Outputs:
2-LINE
—6dB
(500
mV)/4.7
KO
28B324(1)
280261
(1)
1-HEADPHONE
8
Diodes:
$0501
(2)
Record/Playback
Recording System: AC bias Connector: DIN connection
Erase System: AC erase Dimensions: 11-1/4” (W) x 3-1/8” (H) x8”(D)
Tape Speed: 1-7/8 ips. (4.8 cm/s) 285 mm(W) x 80 mm(H) x 203 mm(0)
Tape: Compact cassette tape Weight: Approx. 6-1/8 Ibs. (2.8 kg)
Fast Forward and ;
Rewind Time: Approx. 90 seconds with C-60
cassette tape
These specifications are subject to change in order to accommodate improvements in design.
MATSUSHITA ELECTRICRS
MATSUSHITA ELECTRIC TRADING CO., LTD. gy
P. O. Box 288 Central, Osaka, Japan
ORDER NO. ARD-7303031

LOCATION OF PARTS
@ Tape counter
@ Reset button
@ Cassette cover
@ Level meters
® Recording level controls
Headphone jack
@ Eject button
Record button
@® Rewind button
Fast forward button
@ Playback button
@ Stop button
@ Pause button
Power switch
@® Tape selector
Microphone jacks
@ Line input jacks
Record/playback connector
Line output jacks

DISASSEMBLY INSTRUCTIONS
HOW TO REMOVE BOTTOM BOARD
J
1. Remove 4 bottom board holding screws (A). | 2. Then bottom board can be removed.
HOW TO REMOVE CHASSIS
| Fig. 3 Fig. 4
1. Remove the headphone jack holding nut (B). 4. Remove 4 chassis holding screws (E).
2. Pull out 2 volume knobs (C). 5. Then chassis can be removed.
3. Remove the body case holding screw (D).

MECHANICAL ADJUSTMENTS
Instruments required:
Spring scale (having a range of O~1 kgr), cassette torque meter (RP-8063N).
MEASUREMENT
METHOD
ADJUSTMENT
METHOD
REMARKS
Pressure roller
adjustment.
Playback
400+50 gr
Hook the spring scale
to pressure roller
lever and pull it in the
direction of the arrow
as shown in fig 5.
Adjust by bending the
(a) part of the
pressure roller spring
in either of the arrow
directions.
Measure the value
at the moment when
the pressure roller
moves away the
capstan.
Measurement &
adjustment of
takeup tension.
Playback
55+15 gr-cm
Mount the cassette
torque meter in the
same way as the
cassette tape, and set
in playback mode.
The takeup tension
is shown as in fig. 6.
Turning the plate
spring, adjust
frictional force.
See fig. 7.
Cassette torque meter
(RP8063N) is
informed in VOL. 5,
NO. 5 of technical
information previously
issued.
Measurement of
detecting piece
tension.
Playback
40~60 ger
Press part A of the
detecting piece ina
Straight line in the
direction of the arrow,
as shown in fig. 8.
Indicator
Torque Scale
RP- 8063N
Tension Gauge
Detection Piece

AMPLIFIER
ADJUSTMENTS
Conditions
for
measurement:
Equipment
required:
Power
Voltage
......ceeeeeeeee
AC
90~250
V
VTVM,
AF
OSC,
oscilloscope,
resistor
(10Q,
600Q).
SIGNAL SOURCE OUTPUT
ITEM
CONNECTION
CONNECTION
MODE
ADJUSTMENT
SPEC.
|
REMARKS
WIRING
FIGURE
Adjust the AF OSC to
obtain a circular and (Erase Head) (Lissajous' Pattern)
Measurement
of
Oscilloscope
with
Sade
Caen
e
1]
oscillation
——
AF
OSC,
as
shown
|
Record
St
ence
Ee
Bee
seinclion
Mequon
BS
frequency
is
indicated
—
*
by the scale of the AF (AF ose)
OSC.
Fig. 9
Erase Head )
Measurement of VTVM, as shown
erase
current.
in
fig.
10.
Record
ween
VTVM
Fig. 10
(Record Head) Head
Set the volume control esa
to minimum. a
Measurement
of
:
Bias
Current
3]
recording
bias
=
Ni
Snow
Record
VRLO4
eee
es
ri’
(0.55+0.02
mA)
current.
ANE
eh?
VR204
(Left)
:
rage
ace
(5.5+0.2 mV) :
7 R124(Right) or
Resistance value
(10) R224(teft) VTVM
Fig. 11

SIGNAL SOURCE OUTPUT
{TEM
|
~
CONNECTION
CONNECTION
MODE
ADJUSTMENT
SPEC.
REMARKS
WIRING
FIGURE
|
To roan ‘a (Recording AMBIIeD) aeayPypack Head)
Pe
read
cosonser|
Tae
CaP
[Yow
MIC —73+3 dB ; ; AF OSC ATT 100
Measurement
of
ee
:
Stop
the
bias
oscillator
—
4
_
aes
j
recording tevel. Be 3043 OB | See fig. 12. econ 0.45mVv by unsoldering point A
| as shown in : :
fig 12 shown in printed
Nea circuit board view on
page 7.
Fig. 12
Measurement of | ;
;
The
same
as
=
VR103
(Right)
|
0
VU
on
5
recording
level
Shave:
Record
VR203
(Left).
|
VU
meter.
At
0.5
V
line
output.
===
indicator.
(Playback Head Remove the Head)
333Hz —74
el
sire
carci:
29
SB)
NT
YM
46
II
Playback
|
VR102
(ign
|g
5
y
ane
2°88,
sae
E
as
shown
in
output
jack.
‘
VR202
(Left)
“7D
ad
gain.
fig.
13.
(Playback
Ampiitier)
(viv)

CIRCUIT BOARD
Point A
47 25v470
280261 *E
R132 i
(Wi “
a
’
BK
Nai
NOTE:
The circuit shown in green on the conductor +B circuit.
Values indicated in. are DC voltages between the chassis and
electrical parts.
The upper values should be measured during recording and the
lower values during playback.
Pine
mw AO
Tr8 ZSAIO2AA |
|
| ; f
{
i
i
|
i
on ees meet ! | i
i
Naf
Me
Madu
ease
ee
a
anant
ee
ee
i
i
|

i
/
:
i
:
i
CIRCUIT BOARD
£0.03y) [#2-25y
+0.05v) [42 30V
L. BIAS
VR204 “100K (B)
ae,
ee .
—
+12.0V
Giegy]
eviO0o te pe L:. 7. Y a a f
¥3.10v)
|
:
Weel
20y/Tooe)
ge
lg
|
2.50]
Fie
ov]
[rigovl
+4. 40V
NOTE:
The circuit shown in green on the conductor +B circuit.
Values indicated in are DC voltages between the chassis and
electrical parts.
The upper values should be measured during recording and the
lower vaiues during playback.

SCHEMATIC DIAGRAM MODEL RS-260US
RIGHT LINE IN (0)
C127
Hod E
100K
O
MIC IN | wire
0 R102
680
RECORDS
aa | | CL
DIN SOCKET
R201
LEFT LINE IN (0) 100K
C227
Jom
RECORD, AR
_ ! Sal
3s
680
c228 seor |B
(\ !
PLAYBACK* — {h 0
HEAD Ml
S1-3 Sl-4 S1-5
Ly, ) cae L,
i
ene
+
+
%
%
91%
Tr3
280844
TS
280828
Tr7
2SM102AA
3
Py
4
T10
280261
C115. 16V10 R122 1.
C104 0.015 1
co
600
a
ee
ee
©
01
gra
Ay
C113
16V10
C114
26V3.3
e
OO00QQ00000000
“ss
3
AC POWER
a
HEADPHONE
C112_6¥1000
R104
gigs 10K
STANDARD VOLTAGE CHART
Recording | Playback | Botnet | Recording | Playback
+12.0V | +140V) @ | +6.3V
+0.51V | +0.51V +32
| +13.5V
R125 C124
| Les 68K 470P
R126 5.6K
C125 0.0015
C126 180P —VR104 100K(B)
+2.25V +2.3V
i
(226
180P
VR204
100K(B)
eee
| +0.03V | +0.05V +16.5V
|
|
|
(204
0.01
;
ce
204
0.015
+3.1V
,
+3.6V
+7.6V
|
|
i
+6.1V
+4.0V +4.4V
| @ +5.9V
R203
10K(B)
C213 C214 +2.5V | +3.0V
16V10—-25V3.3
NOTE: All measurements are under no signal conditions with volume at
minimum position.
Use VTVM for voltage measurements.
NOTE:
1. $1-1~S1-11 ... Record, playback select switch (shown in playback position).
2. S2-1, $2-2 ...... Tape select switch (shown in CrOz position).
By S34 sascawarns Power ON,’OFF switch (shown in OFF position).
4. $4-1, $4-2 . Stop switch (shown in playback position).
5. $5. - Motor ON/OFF switch (shown in ON position).
6. S6..... . AC voltage select switch.
7. VR101, 201 ... Recording level control VR.
C203
R204
8.
VR102,
202
...
Playback
gain
adjustment
VR.
0.01
10K
9.
VR103,
203
...
Level
indicator
adjustment
VR.
10. VR104, 204 ... Recording bias current adjustment VR.
11. Resistors are ohms (Q), 1/4 watt unless specified otherwise.
!
[7
12.
Capacitors
are
microfarad
(/*F)
unless
specified
otherwise.
fa \ ‘ >< ERASE HEAD P-=-Pico-farads.
16
Ss
13.
Encircled
numbers
(©
)
show
the
checkpoints
for
voltage.
228
00015
The
values
are
marked
in
the
standard
voltage
chart.
Tr2_ 2SC1327 Tr4 2SC644 Tr6 2SC828
pear

ELECTRICAL PARTS LOCATION
Ell
ElZ
S6
S4
E10

CABINET PARTS

EXPLODED VIEWS
tee
/ Ci 7Oe
aN:

M62
Mo4
M66
Printed in Japan

REPLACEMENT PARTS LIST
MODEL RS-260US
NATIONAL PANASONIC
RS-260US
NOTE:
. Be sure to make your orders of Replacement Parts according to this List.
. “x” in “Rank” Column indicates that the part are not supplyable.
. “A, B and CG” in “Rank” Column indicates the recommended stock of replacement parts.
Refer to the recommended stock table on last page.
. “®” in “Remarks” Column indicates New Parts.
. “so” in “Remarks” Column indicates ISO Screw or Nut.
. “%” in indicates the serrated parts with 18 notches.
NOTA:
. Habra que asegurarse que los pedidos de piezas de repuesto se hagan segun esta lista.
. “><” marcado en la columna “Rank”, quiere decir que dichas piezas no pueden ser provistas.
. “A, By CG” marcadas en la columna “Rank” indican el surtido que se recomienda tener de dichas
piezas de repuesto.
. “Q®” marcado en la columna “Remarks”, quiere decir que las piezas son nuevas.
. “sey” marcado en la columna “Remarks”, quiere decir que es un tornillo o tuerca “ISO”.
. “GS” indica las partes dentadas con 18 ranuras.
NOTE:
. Bien s'assutet de se conformer a la liste suivante pour les commandes de piéces de rechange.
. “x”, dans la colonne ‘‘Rank’’, indique qu'il n’est pas possible de fournir ces pieces.
. “A, B et CG”, dans la colonne ‘‘Rank”, indiquent le stock recommandé de pieces de rechange.
Se reporter en derniére page au tableau des stocks/recommandés.
. “@®", dans la colonne ‘‘Remarks’’, indique les piéces nouvelles.
“@rss)"’, dans la colonne ‘Remarks’, indique une vis ou Un écrouU ISO.
“#%" indique les pieces cannelées 4 18 crans.
HINWEIS:
. Bestellen Sie Ihre Ersatzteile genau nach dieser Liste.
. Mit “x” in der “Rank” Spalte aufgefiihrte Teile kénnen nicht geliefert werden.
. “A, B und C” in der “Rank” Spalte zeigt Ihnen den Vorrat der Ersatzteile an.
. “@®” in der “Remarks” Spalte bedeutet “neue Teile”.
. “Css” in der “Remarks” Spalte bedeutet ISO-Schraube oder Mutter.
. “GM bezeichnet die gezahnten Teile mit 18 Zahnen.
. RARASE Za, Bak RULAMI ZR.
. | 48%) (Rank) —flthz “XK” BRR AR ERE HE
. | Sek) (Rank) iz “A, B, C” HicAMRBSAAER, (AEM.
mS IRR AN [TMB |,
. | 43% | (Remarks) —iWPZ “OO” A RECA NRG Oe
. | 33 | (Remarks) —i PZ “GSS” FPR aC As BRE (CBRE (ISO) SURE,
. RS? FER RECA AT 18 (EDS SEAR EF

Description
MECHANICAL PARTS
Screw 62.6 x 10
Lock Washer 2.6¢
; eer ene eee
| XSN26 +10
/ XWC26B
Part No.
Price (Per Pce.)
RS-260US
Remarks
Cassette Retainer Assembly
epee rentee te |
| QxaK0015
Brake
Auto Stop Driving Pawl Spring
QBJ1941
| QBT1489M_
Auto Stop Driving Lever Assembly
Stop Ring E2.5¢
Counter Angle
Auto Stop Driving Paw!
Takeup Idler Lever Assembly
Idler Spring
Nylon Snap Washer
Takeup Reel Table Assembly
|
i
i
= - ase ae SS
i}
Supply Reel Table Assembly
Counter Belt |
Sees Na Bees es i
Pressure Roller Lever Assembly
Pressure Roller Spring
Tape Counter
Sems Screw 23 x6
Tapping Screw ©3x*8
Sems Screw 2.6 x 10
Sems Screw 26 x6
Upper Base Plate Unit
XUC25FT
QBJ1656
QXL0621,
QXLO0687
QBT1558M
”
QWQ1124
QXP0319
“QXP0373
| QXLO689
Qob0143
QBN1157
QDC0046S ©
QMA1953
“XYN3+C6S
XTN3 +8
I XYN26+C10
XYN26-+C6_
COMMON
RQ:409S, 436S,
4378 '
“| RQ-237S, 3098
r ee ee ee
'®
RQ-421S, 4378
“TRQ-409S, 4215, ©
4378
aa
®)
|s
®)
| RQ-409S, 4378
QXK1331
~ Auto Stop Detect Lever Spring
~ QBN1188
I
= ad Se Bee
|
i
|
|
i
~ | COMMON -
”
‘eee
i .
COMMON
”
/RQ-409S
Auto Stop Detect Lever Assembly
“Screw CG2x 12
QXLO482
RQ-421S
tee
“1 COMMON
Screw D2.6 x 6
{
ne eee
if
“Head Spacer

Description
Head Base Plate Unit
Part No.
QxK0073
Price (Per Pce.)
RS-260US
Remarks
Lid Hook Plate Unit
QXHO170
Stop Ring E3¢
Eject Rod (1) Assembly
XUC3FT
QXROO004
Eject Lever Spring
Eject Rod (2)
QBT1490
QMR1309
COMMON
®
RQ-421S, 4378
ject Lever-C Spring
QBT1604M
ush Button Assembly
Push Button-A
QXB0164
QXB0147
Push Button-B
Push Button-C
Steel Ball 2.5¢
®
8
{®
®
RQ:
4098, 4218
Reel Table Washer
Screw
RQ-4098, 421S,
j.. 4378
QHQ1168
Lever Guide
Record Lever Spring
QGGO0003
QBT1670M
Fast Forward Lever Spring
QBT1671M
RQ-421S
Lock Rod Assembly
Lock Rod Spring
QXROOO1
QBT1672M
Record Lever Assembly
Fast Forward Rod (2)
Stop Ring E5¢
XUC5SFT
Fast Forward Rod (1) Assembly
QXROO02
Takeup Lever
Playback Rod Assembly
Stop Lever
Stop Ring E2¢
QML1953
QxXROO05
RQ-437S
Te
QML1954
RQ-437S8
XUC2FT
Fiber Washer
COMMON
QBK7122
COMMON
Lock Spring
QBN1271
RS-271US

RS-260US
om Pes/ Price (Per Pce.)
Rank | Ref. No. Description Part No. Set Remarks
Cc 55 Lock Plate QML2379 1 RS-271US
Cc 56 Pause Rod Assembly QXROO003 1 ©)
Cc 57 Screw QMS1833 3 RQ-409S, 4378S
Cc 58 Rubber Cushion QBG1055A 3 RQ-409S, 437S
Cc 59 Motor Angle QMA1952 1 ®)
B M60 Motor Pulley QDP1378 1 RQ-409S, 437S
A M61 Motor QDMOS80A RS-281S
c 62 Screw O23 XSN2—3 | | COMMON
Cc M63 Fast Forward Frame Assembly QXG1014 ®
Cc M63-1 Gear Spring QBN1196 ! RQ-4098, 4378S
Cc M64 Flywheel Retainer Assembly QXHO095 1 RQ-4218, 437S
A | 65 Flywheel QXF0063 1 ”
A 66 Capstan Belt QDBO141 i 1 ”
Ud sce po eres a aa ens Coe ts
Cc M67 Fiber Washer QBK7130 1 RQ-421S, 4378S
RESISTORS
B R101, 201 Carbon Resistor 100KQ 1/4W ERD14TJ104 2
B R102, 202 ” 680Q 1/4W ERD14TJ681
Bye ” 68KQ 1/4W | ERDI4VJ682 3
B R104, 204 ” 10KQ 1/4W ERD14VJ103 2
= “sy 7 en foo E
R105, 107, y
B | 205,207, | aa _aee KQ 1/4W ERR ia ts nih ie _
B R106, 206 Carbon Resistor 330KQ 1/4W ERD1L4VJ334 2
R 08, 117, - yaa ‘ _ ;
B 208, 217 47KQ, 1/4W Reng ers ; fj ak 7 7 ;
B R109, 209 ” 820 1/4W ERD14VJ820 2
B te 129, ” 1.2KQ 1/4W | ERD14VJ122 3
B R111, 211 ” 2.2KQ 1/4W ERDL4AVJ222
TRI12, 114, ;
B | 212214 | Carbon Bester . 18KQ HAN ERG TNSISS 4 Eo ef 7 7
B R113, 213 ” 120KQ 1/4W ERD14VJ124 12
R115,123.131, 7 ~
pace 2 5,223 i 4.7KQ 1/4W ERD14VJ472 5
B R116, 216 ” 100Q 1/4W ERD14VJ101 2

R118, 121,
218, 221
Description
Carbon Resistor 1KQ 1/4W
Part No.
ERD14VJ102
Price (Per Pce.)
RS-260US
Remarks
Carbon Resistor 470Q 1/4W
ERD14VJ471
” 15KQ 1/4W
ERD14VJ152
10Q 1/4W
ERD14VJ100
68KQ 1/4W
L ERD14VJ683
5.6KQ 1/4W
ERD14VJ562
R128
Solid Resistor 180Q
1/2 W i ERC12GK181
R130
Carbon Resistor 8.2Q 1/4W
R132
Solid Resistor 22Q 1/2W
| ERD14VJ8R2
ERC12GK220
R133
Carbon Resistor 15Q 1/4W
ERD14VJ150
R134
Solid Resistor 109 1W
ERC1GM100
R135, 235
Carbon Resistor
180 KQ ei ERD14VJ184
VARIABLE RESISTORS
VR101, 201
Variable Resistor 50 KQ, (A)
EVHBOAK20A54
®
VR102, 104,
202, 204
Semi-fixed Variable Resistor
100 KO (8) |
QVLOOAAO0B15
RS-275US, 2818S,
715US
VR103, 203
10 KQ (B)
QVLOOAAOOB14
“TRS-262US,263US,
275US
CAPACITORS
C101, 201
ectrolytic Capacitor 1004F
ECEA16V100L
C102,108,114,
202,208,214
” 3.3 uF
ECEA25V3R3L
C103, 203
ylar Capacitor 0.01 4F
ECQMO5103MZ
C104, 204
ECQM05153KZ
C105, 205
ica Capacitor 47 pF
ECMS05470KH
06, 206
: Ceramic Capacitor 1000 pF
ECKD1H102P
O07, 207
ylar Capacitor / 0.082¢F
ECQMO5823KZ
09, 209
ectrolytic Capacitor 1eF
ECEA5OVIL
eramic Capacitor 270 pF
ECCD1H271K
ectrolytic Capacitor 1004F
ECEA6V100L
ectrolytic Capacitor 1000¢F
ECEA6Vi000L

RS-260US
Price (Per Pce.)
Description
Part
No.
Remarks
Electrolytic Capacitor 10 pF ECEA1L6V10L
1004F ECEA25V1LO0OL
47 LF ECEA25V47L
A70pF tt ECEA25V470L
Electrolytic Capacitor AT0EF | ECEA10V470L
Mylar Capacitor O.1 uF ECQM05104MZ
Electrolytic Capacitor
330eF | ECEAL 6V330L _
0.0082"F | ECQM05822KZ
Styro Capacitor - 560 pF ECQS1561KZ
Styro Capacitor — 470 pF ECQS147 KZ
Mylar Capacitor 0.001 5y4F ECQM05152MZ
Styro | Capacitor 180 pF ECQS1 18 1KZ
_ 1000 pF | ECKE1H102P
Polypropylene Capacitor 0.047 uF | ECQF4473M
Styrol Capaci
ECQS1331KZ
TRANSISTORS
2SC1327
RS-271US, 276US
Transistor
280644
RS-270US,272US,
275US
28C828
RS-275US
2SA102AA
2SB324
COMMON
os
Transistor
| 2SD261
| RS-270US,272US,
| 275US
DIODES
Diode
COMMON
TRANSFORMERS
Headphone Transformer
QLA0376
©
Oscillator Transformer
if
QLBO155
RQ-421S
Power Transformer
QLPO564A
®)

Description
Price (Per Pce.)
RS-260US
Remarks
L101, 201
Trap Coil
SWITCHES
Slide Switch
____(Record/Playback
Selector)
QSS1162
Slide Switch (Tape Selector)
QSS1172
Push Switch (Power ON/OFF)
QSwW0114S
RS-276US,
8208S
Slide Switch (Stop Switch)
Leaf Switch (Motor ON/OFF)
QSS1105
RS-261S, 275US
QSB0169B
“Rotary Switch (AC Voltage Select)
QSR0004B
ELECTRICAL PARTS
Record/Playback Head
Erase Head
QwY4107X
QWY2110Z
Level Meter
QSL1023
Jack Board Assembly
~ QEJ0250
M3 Jack
QJAO115
QuAd229
Pilot Lamp
XAMQ16P300
6P Terminal Board
QUT6009
“| AC Power Cord
QFC1041
”
~QFC1035
‘COMMON
(RS-260USE only)
Cord Bushing
Fuse Holder —
QTD1126A
QTF1042
| Fuse 0.15A
XBAQOO11
COMMON
DIN Socket
~QJS0723S _
COMMON €S3)
CABINET PARTS
Body Case Assembly
QYMO0086
F Cassette Lid Assembly .
QYFO127.—t”*”W
~ Cassette Lid Spring
QBN1302 _