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Sharp SG-17H Serviceanleitung Seite 10

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©)
1. Resistor:
2.
©)
. Widerstand:
ooh
©)
. Résistance:
|
A
moins
d'indication
contraire,
les
résistances
sont
3.
NOTES
ON SCHEMATIC
DIAGRAM
Capacitor:
@ Unless otherwise
specified,
microfarads, P = Picofarads
|
. Kondensatoren:
@
Falls nicht anders angegeben, sind alle Kondensatoren in
Mikrofarad angegeben.
P = Picofarad
@
(CH), (SH), (TH), (WK):
TK-Kondensator
@
(P.P.): Polypropylentyp
. Die Spannungen werden bei Einstellung des Gerates auf die
Tape-Stellung
ohne
Signaleingang
mit DigitalvielfachmeR-
gerat gemessen.
exprimées en ohm, K (1000 ohms) ou M (1000K ohm).
. Condensateur:
@® A moins
de notification
contraire, toute
capacité est
exprimée en microfarads.
P = Picofarads
|
@ (CH), (SH), (TH), (WK): Compensation de température.
@
(P.P.) : Type polypropyléne
La tension est mesurée a I'aide d'un multimétre numérique
dans les conditions de non signal sur la position ''tape"'.
SW101
(AJ)
—11—
ified, all resistors are shown in ohm,
Capacitors
are shown in
SW1 (AVF)
Function Selector Switch}
PHONO-TAPE-FM ST-
FM-MW-LW
Record Playback Switch
.
SW104
Tape Motor Switch
swan)
Off-Or
S501
Off On
~ Swi102
|
Beat Cancel
Switch
(
) : AM mode
Marking except for (
) : FM mode
Parts marked " A\ " (2%) are important for maintaining the
safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.
@
Specifications or schematic diagrams of this model are
subject to change for improvement without prior notice.
ANMERKUNGEN
ZUM
SCHEMATISCHEN
SCHALTPLAN
(
) : AM-Betriebsart
Anzeichnen, auBer (
) : UKW-Betriebsart
Die
mit
A
(-*) bezeichneten
Teile
sind
besonders:
wichtig
fiir die Aufrechterhaltung
der Sicherheit.
Beim
Wechseln
dieser Teile sollten immer die vorgeschriebenen
Teile verwendet werden, um sowohl
die Sicherheit als auch
die Leistung des Gerates aufrechtzuerhalten.
® Technische
Daten oder Schaltplane dieses Modells k6n-
nen jederzeit im Sinne der Verbesserung ohne Voran-
kUndigung geandert werden.
REMARQUES
CONCERNANT
LE DIAGRAMME
SCHEMATIQUE
(
) :Mode AM
Marque, a l'exception de (
) : Mode FM
Les piéces avec une marque
/\
(=) sont importantes
pour
maintenir
la
sécurité
de
l'appareil.
S'assurer
de
remplacer ces piéces par celles spécifiées pour maintenir la
sécurité et la performance de |'appareil.
@
Les caractéristiques ou les diagrammes de cablage de ce
modeéle
sont
sujets a modification
sans préavis pour
l'amélioration du produit.
Playback-Record
©)
TORQUE
CHECK
AT
PLAY,
FAST
FORWARD
AND
REWIND
MODES
(See Table 12—1.)
|
;
-
Put a torque meter cassette in the cassette holder of the unit,
and see that the measured torque in each mode is normal as
shown in Table 12-1,
PINCH ROLLER
PRESSURE
CHECK
1. Place the unit in playback mode.
|
2. Push the pinch roller, at the point shown
in Figure 12—1,
by using a tension gauge (500 g) so that it will come off the
capstan. Then, slowly release the tension until the pinch
roller hits the capstan again (i.e., the pinch roller is about to
rotate
again). Check, then, the tension
gauge
is reading
270g
to 370g. ~
-
7%
3. If the reading is outside the range of 270 g to 370g, replace
the pressure spring of the pinch roller.
RECORD/PLAYBACK
HEAD
AZIMUTH
ADJUSTMENT
1. Connect instruments as shown in Figure 12—2.
2. Adjust the head azimuth adjusting screw so that the output
signals from both channels will have maximum waveform
with the same phase in right and left.
TAPE
SPEED
ADJUSTMENT
Connect instruments as shown in Figure 12—3, put a screw-
driver (for high-frequency use) into the hole of the motor, and
adjust the variable resistor so that the output frequency is
2980 to 3020 Hz on frequency counter.
Record/Playback
T™201
;
Head
Speaker
FREQUENCY
eerie
Playback Mode
Output
COUNTER
Test Tape
MTT-111
(3 kHz)
Figure 12—3
for high-freq.
MECHANICAL
ADJUSTMENT
OF TAPE
DECK
cassette
;
35~ 60 gem _
85 ~ 120 g-cm
Table 12-1 |
Tension Gauge
Capstan
Pinch
_" Pause
Roller
" ~ Lever
O
r
iN
Pinch Roller
Pressure Spring
Figure 12—1
Dual-trace
TM201
ELECTRONIC
OSCILLOSCOPE
Speaker
VOLTMETER
Playback
Output
Terminals
(Left)
Test Tape
MTT-114
TM201
Speaker Output
Terminals (Right)
as small as possible
Figure 12—2
ELECTRICAL
ADJUSTMENT
BIAS
OSCILLATOR
FREQUENCY
CHECK
1. Connect instruments as shown in Figure 12—4.
2. Set the function
selector switch
at
tape
and the beat
cancel switch at A position.
3. Place the unit in record mode, and see that the frequency
counter is reading within 80kHz to 96kHz.
4. Also with the beat cancel switch at
B
(and/or C ) posi-
tion,
see that the frequency
counter
is now
of the value
about 2kHz
(6kHz) lower than in the step 3 above. Then
set the beat cancel switch to
A_ position again.
PLAYBACK
AMPLIFIER
SENSITIVITY
CHECK
1. Connect instruments as shown in Figure 12—5.
2. Set the function
selector switch
at
tape,
the volume
control
knob
at
max.,
the
balance
control
knob
at
center
position
and
the
tone
control
knob
at center
position,
3. Playback a test tape (TEAC
MTT-118, 1 kHz, 250 pWb/mm,
—10 dB prerecorded).
7
4. See that the electronic voltmeter
is reading about
5.3V.
r
Erase Head
Joi imerer
FREQUENCY
COUNTER
Figure 12—4
TM201
Speaker Output
Terminals
Playback Mode]
ELECTRONIC
OSCILLOSCOPE
VOLTMETER
Test Tape
os
MTT-118
Record/Play back
Head
Figure 12—5
ae

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