Aiwa HS-PX590, Service Manual

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12
ADJUSTMENT
<TAPE PLAYER SECTION>
1. Tape Speed Adjustment
Settings : • Test tape : TTA–100
(Tape center)
• Test point : PHONES (J101)
• Adjustment location : SFR301
• MSP : CLASSIC
• TAPE SELECTOR : NORM
• VOLUME : MAX
Method : Play back (FWD) the test tape and adjust
SFR301 so that the frequency becomes
3015Hz±10Hz. Then confirm WOW is less
than 0.50%.
2. Dolby level check
Settings : • Test tape : TTA–200
• Test point : Dolby test point
TP1(L-CH)
TP2(R-CH)
• DOLBY SW : OFF
• DSL : OFF
• TAPE SELECTOR : NORM(auto)
• VOLUME : MIN
Method : Connected an electroytic capacitor (10uF/16V)
to measured equipment and TP1, check the
voltage for 32± 1.0dB.
PRACTICAL SERVICE FIGURE
<TAPE SECTION>
Tape speed : 3015Hz ± 50Hz
Wow : Less than 0.5% (RMS)
Take-up torque : 13 ~ 22g-cm (FWD)
F.F torque : 45 ~ 80g-cm
REW torque : 45 ~ 80g-cm
Back tension : 1.0 ~ 2.5g-cm (FWD)
S/N ratio : More than 45dB (PB, DC)
Distortion : Less than 3.0% (PB, DC)
Noise level : Less than 3.0mV
(Vol MAX, PB, DC)
Less than 0.3mV
(Vol MIN, PB, DC)
Frequency response : 63Hz + 4 / – 4dB ~ 8kHz + 4 / – 4dB
(NORMAL)
63Hz + 4 / – 4dB ~10kHz + 4 / – 6dB
(CrO2)
Test tape : TTA – 100
TTA – 200
TTA – 320(NORMAL)
TTA – 310(CrO2)
SFR301
MAIN C.B
A
PHONES
1
1
VR1
VOLUME
IC201
J1
IC301
TP1
(R-CH)
(L-CH)
TP2
2