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Aiwa HS-EX50 Service Manual page 13

Stereo radio cassette recorder

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TC9Y9381IF-O0O14
Pin No.| Pia Name [170[ ———SDesePiption
SCOSCSCSC*S
QO aa
|
REW
Tape end sensor input.
Performs the AUTO operation when there is no change between "HIGH" and "LOW" for
STOP
PLAY
:
REC
SW
AUTO
2.5 seconds.
=
ESE
H
EEE
qy
ie]
H
Cassette switch terminal.
An input key is accepted only at "LOW"; all operations are stopped at "HIGH".
oO
The reset and direction operations are performed when "HIGH" changes to "LOW".
PLAY SW terminal
(Malfunction prevention terminal).
"LOW" during play and "HIGH" in other modes.
FWD/REV terminal.
FWD at "HIGH" and REV at "LOW".
I
Determines the tape running mode (2),C™).(o™)
at "HIGH" and Pp») at "LOW",
MUTE output.
"HIGH" : Start of PLAY, DIRECTION, FF, REW, "LOW? : in other modes.
Motor rotation direction switching output.
"HIGH"
: FF of REW, REW and PLAY of FWD,
"LOW" : in other modes.
Motor on/off switching output. The motor stops at "LOW",
PLAY
SW
a | n
:
et
F/R
REV
MODE
MUTE
DIRECTION
MOTOR
Unused.
REC
PL
REC plunger output.
"HIGH" output sets the unit to the record mode.
MD plunger output.
,
MD
PL
"HIGH" output attracts the MD plunger and "LOW" output releases it.
mle
fepeie}>
eB Be tele]
m
Oo}
OO
[@OINIO!
oF
& folpl
&
VDD
Power terminal.
13
ADJUSTMENT — 1
({H]MOTOR
GOVERNOR
C.B)
TP103
J1 PHONES
< TAPE RECORDER
SECTION >
(F-7FL3A-F-*B
1. Clock Frequency
Check
Settings : * Test point : TP103
Method : Connect a resistor (IMQ)
to counter and
TP103. Check
the frequency
at TP103
is
2650H + 250Hz.
27—-FAE— FHS
RFs * FAKF—-T7F: TTA— 100 (TTA — 1115S)
2. Tape Speed Adjustment
1.70 » DARE
Rs FARR
Yb : TP1OS
Fk:
HIYA —ETP1OB OMI 1M O OGLE HL T. Ae
Has 2650Hz + 250Hz THA CL EHBTS.
"FARR Yb : PHONESHE (J1)
Settings : Test tape: TTA — 100 (TTA—111S)
WRB
: C—-Y—A7NI+—OSFR1
|
¢ Test point : PHONES
JACK
(Ji)
|
Fitk: FAbF—-THEBAL,
FWD
3000Hz,
REVEHI FWD
¢ Adjustment location: SFR1 of motor
WUT HASHES KG IHBITS.
governor
Method : Play back the test tape, adjust for 3000Hz
at
FWD
and + 45Hz
at REV.
3. FIVE
— VANDER
RE
2+ FALF—-T: TTS —200 (TTA — 161, TCC — 180)
"FAR
Yb: TPIOL (Lch), TP102 (Rch)
+ Mei
: SFR1 (Lch), SFR2 (Rch)
«DOLBY
SW:
OFF
«DSL SW: OFF
«BBE SW : OFF
BERL TA by
hOMNC10
uF /16VORRILY
FT
*DSL SW: OFF
v¥— 2s
L CT. FWD
REWER 100mvV + l0mVizte
*BBE SW: OFF
S&S HBTS.
Method : Connect an electrolytic capacitor (10 u F/16V)
to measured equipment and TP101 (102), adjust
for 100mV + 10mvV.
3. Dolby Level Adjustment
Settings : * Test tape : TTS — 200 (TTA — 161, TCC — 130)
* Test point: TP101
(Lch), TP102
(Rch)
* Adjustment location : SFR1 (Lch), SFR2 (Rch)
*DOLBY SW: OFF
.
=
14
|
ATP:
Rt
Tk
PRA(
FU
Malt
(IHF *
(S/N
PR
FM 235
ve
EYF
BERL
REY
Bek
SNEE:
J42%
NAP.
AiR

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