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AIWA HSTX394
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of AIWA HSTX394 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 17 (click to view)
ADJUSTMENT PRACTICAL SERVICE FIGURE
6
A MAIN C.B

<TUNER SECTION>
Sensitivity : (IHF, THD 3%)

SFR 1

VOLUME

F M Less than 20dB [at 76MHz (YU,YL)] Less than 20dB [at 87.5MHz (YH,YJ,YZ)] Less than 20dB [at 90MHz (YU,YL)] Less than 20dB [at 98.1MHz (YH,YJ,YZ)] Less than 20dB [at 108.0MHz] A M Less than 59dB [at 630KHz] Less than 56dB [at 1000KHz (YU,YL)] Less than 56dB [at 999KHz (YH,YJ)] Less than 59dB [at 999KHz (YZ)] Less than 56dB [at 1440KHz (YU,YL,YH,YJ)] Less than 59dB [at 1440KHz (YZ)]

4

2

IC1

VR1

Sensitivity : (S/N 10dB)

L102

5
VC101

TP2(VT)

3

PHONES

L103 L105
J1

4 3
L101 BAR ANT P HEAD

1

6

F M More than 43dB [at 76MHz (YU,YL)] More than 43dB [at 87.5MHz (YH,YJ,YZ)] More than 43dB [at 90MHz (YU,YL)] More than 43dB [at 98.1MHz (YH,YJ,YZ)] More than 43dB [at 108MHz] A M More than 25dB [at 630kHz (YU,YL,YH,YJ)] More than 24dB [at 630kHz (YZ)] More than 27dB [at 1000KHz (YU,YL)] More than 27dB [at 999KHz (YH,YJ)] More than 25dB [at 999KHz (YZ)] More than 27dB [at 1440KHz (YU,YL,YH,YJ)] More than 25dB [at 1440KHz (YZ)] Intermediate frequency : F M 10.7MHz ± 0.1MHz A M 450kHz ± 3KHz FM stereo separation : More than 16dB [at 90MHz (YU,YL)] More than 16dB [at 98.1MHz (YH,YJ,YZ)]

S/N Ratio

IC101

7 FWD

<TAPE SECTION>
Tape speed : Wow & flutter : Take-up torque : F.F torque : Rew torque : Back tension : S/N ratio : Distortion : Noise level : 3000Hz ± 60Hz Less than 0.50% (RMS) 35 ~ 50g-cm (FWD) More than 36g-cm 60 ~ 170g-cm 1.5 ~ 4.5g-cm (FWD) More than 43dB (YU,YL,YH,YJ) More than 40dB (YZ) Less than 3.0% Less than 7.0mV (YU,YL,YH,YJ) Less than 4.0mV (YZ) (Vol MAX, without tape) Less than 0.3mV (YU,YL,YH,YJ) Less than 0.2mV (YZ) (Vol MIN, without tape) 63Hz + 1/-5dB ~ 8kHz ± 4dB (NORMAL) TTA – 100 TTA – 210 TTA – 320 (NORM)

<RADIO SECTION>

<TAPE PLAYER SECTION>

1. AM IF Adjustment 6. Tape Speed Adjustment L105 ....................................................................... 450kHz Settings : • Test tape : TTA–100 (TAPE CENTRE) • Test point : Phones Jack (J1) 2. AM VT Check • Adjustment location : SFR1 Settings : • Test point : TP2 (VT) • Tape/radio : TAPE Method : Set to AM 530kHz and check that the test • S-BASS : OFF point is more than 0.8V. Then set to AM 1710 • Volume : NON-CLIP(MAX -10dB ) kHz and check that the test point is less than Method : Play back the test tape and adjust SFR1 for 8.7V. 3000 ± 10Hz. Then confirm WOW is less than 0.50%. 3. AM Tracking Adjustment 7. Azimuth Adjustment L101 ....................................................................... 630kHz Settings : • Test tape : TTA–330/TTA–420 VC101 .................................................................. 1440kHz • Test point : Phones Jack (J1) • S-BASS : OFF 4. FM VT Adjustment • Tape/radio : TAPE Settings : • Test point : TP2 (VT) • Volume : MAX • Adjustment location : L103 • Adjustment location : Head azimuth adjustment Method : Set to FM 76MHz and adjust L103 so that the screw test point becomes 1.0V ± 0.1V. Then set to Method : Play back the 8KHz signal of the test tape and FM 108.1MHz and check that the test point adjust screw so that the output becomes maximum. is less than 8.5V. 5. FM Tracking Adjustment L102 ....................................................................... 76MHz

Frequency response : Test tape :

29

30

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