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AIWA HS-GS302
Service Manual


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

Description of AIWA HS-GS302 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 6 (click to view)
ADJUSTMENT
A MAIN C.B

MECHANICAL EXPLODED VIEW 1 / 1
2

SFR 2

* P HEAD
VOLUME

VR1

*

3 FWD
TP1 (L-CH)

SFR 1

*

4ZM-2 P7NC
TP2 (R-CH)

A

*
C

B

PHONES

SFR 51

J1

1

Note :

4

1

2

2

* : On the other soldering pattern side.
1. Tape Speed Adjustment Settings : � Test tape : When the tape starts running smooth, this adjustment is not necessary. If wow is conspicuous at the beginning of the tape-run, perform this adjustment following the procedures below. 1) Solder resistor pattern (A) of the MOTOR AND GOVERNOR MATCHING ADJ. resistor group. 2) Set the tape speed (using speed adjustment SFR51). 3) Restrict the motor rotation by hand (or turn PAUSE ON). 4) Remove your hand and listen to the beginning of the tape-run. 5) When the rise of tape running is smooth, no more adjustment is necessary. If wow continues for 1 to 2 seconds at the rise time, change the combined resistance according to procedure 6 and check that the tape starts running smooth. 6) Solder the resistor pattern according to the table below Pattern Step (1) Step (2) Step (3) Step (4) Step (5) Step (6) Step (7) (NOTE :
A

Method :

TTA � 100 (Tape center) � Test point : Phones Jack (J1) � Adjustment location : SFR51 � MSP : CLASSIC � Tape selector : NORM � Volume : Non � clip (MAX � 10 dB down) Play back the test tape and adjust SFR51 so that the frequency becomes 3000 Hz ± 10 Hz. Then confirm WOW is less than 0.52%.

2. Dolby Level Adjustment Settings : � Test tape : � Test point :

TTA � 200 TP1 (L � CH) TP2 (R � CH) � Adjustment location : SFR1 (LCH)

Low resistance Open Open Open Open Solder Solder Solder

A

Medium B resistance Open Open Solder Solder Open Open Solder

High resistance Open Solder Open Solder Open Solder Open

C

Method :

SFR2 (RCH) � Dolby NR : OFF � Tape selector : NORM Play back (FWD) the test tape and adjust SFRs so that the test point becomes 100mV ± 1dB.

4. Azimuth Adjustment Setting : � Test tape : � MSP : � Volume :

TTA � 330 / TTA � 420 CLASSIC MAX

Method :

� Tape selector : NORM � Adjustment location : Head azimuth adjustment screw Play back (FWD) the test tape and adjust screw so that the 8 kHz signal output is maximum.

= 2.2 ohm, B = 8.2 ohm , C = 10 ohm)

7) Finally re-check the tape speed.

3. GOVERNER Check Perform the STOP �> PLAY and REVERSE operations (or PAUSE ON �> OFF) after the motor is replaced.

Caution : Cool the patterns down to normal temperature after soldering. If the pattern remains heated, the gorvernor circuit does not operate normally.

9

10

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