Aiwa HS-GMX700 Service Manual page 7

ADJUSTMENT
A
MAIN C.B
VOLUME
3
LCH
VR1
TP3 (RCH)
TP1 (GND)
J101
PHONES
<TAPE PLAYER SECTION>
1. Tape Speed Adjustment
Settings : • Test tape :
• Test point :
• Adjustment location : SFR401
• Dolby SW :
• Super Bass :
• Direction :
• Tape selector :
• Volume :
Method : Play back the test tape and adjust SFR401 so that
the frequency becomes 3015Hz ± 10Hz. Then
confirm WOW is less than 0.55%.
2. Dolby Level Adjustment
Setting : • Test tape :
• Test point :
• Direction :
• Tape selector :
• Dolby NR :
• Volume :
• Solder points :
Method : Connect 10µF/16V coupling capacitors between
solder points and test equipment (connect the
positive terminals to the solder points). Short the
Dolby adjust point via solder as shown in the
table so the Dolby level becomes100mV ± 1.0dB
in both the forward and reverse directions.
2
2
2 1
3 2 1
RCH
TP2 (LCH)
TTA – 100 (Tape center)
Phones Jack (J101)
OFF
OFF
FWD
NORM
MAX
TTA – 200
TP1(LCH), TP2(RCH),
TP3(GND)
FWD, REV
NORM
OFF
MIN
Dolby adjust point 1, 2, 3
Dolby Level Adjust List (For RCH and LCH)
Solder point
1 2
Solder Open
Open Solder
Open Open
Solder Solder
Solder Open
Open Solder
Solder Solder
11
SFR401
1
Increase level
3
Open 1.4 dB
Open 2.0 dB
Solder 2.9 dB
Open 3.1 dB
Solder 3.9 dB
Solder 4.4 dB
Solder 5.2 dB