AIWA HS-PX607
Manual de Servicio

ADJUSTMENT
A MAIN C.B

11
VOLUME
4 3 1

2
J101 PHONES

VR101

1 1

2

TP2 (RCH) TP1(LCH) TP3 (GND)

2 2

SFR301

2

1. Dolby Level Adjustment <AE> Setting : � Test tape : TTA � 200 � Test point : TP1 (RCH), TP2 (LCH) � DSL : OFF � Tape selector : NORMAL (AUTO) � Dolby SW : OFF � Volume : MIN � Adjustment points : Soldered patterns 1 � 4 Procedure : Short the patterns via solder as shown in the table so the Dolby NR level is 32 mV ± 1.0 dB. Adjust so the specifications are satisfied in both the forward and reverse directions. Connect 10µF /16V coupling capacitors between test points and test equipment (connect the positive terminals to the test points). SOLDER PATTERN 1 � 4 STANDARD : 24.5 ± 1.0dB SOLDER POINT INCRESE LEVEL 1 only + 0.8 dB Lch
2 1 3

2. Tape Speed Adjustment Settings : � Test tape : TTA � 100 (Tape center) � Test point : Phones Jack (J101) � Adjustment location : SFR301 � Dolby : OFF � DSL : OFF � Tape selector : NORMAL (AUTO) � Volume : MAX Method : Play back (FWD) the test tape and adjust SFR301 so that the frequency becomes 3015 Hz ± 10 Hz. Then confirm WOW is less than 0.50%.

only and 2 only only and 4

+ 1.5 dB + 2.5 dB + 0.8 dB + 1.5 dB + 2.5 dB

Rch

4 3

- 10 -