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A
MAIN C.B
VOLUME
VR101
SFR101
PHONES
J102
1
1
<TAPE PLAYER SECTION>
1. Tape Speed Adjustment
Settings :
• Test tape :
TTA–100 (Tape center)
• Test point :
PHONES (J101)
• Adjustment location : SFR101
• MSP :
CLASSIC
• TAPE SELECTOR : NORM
• VOLUME :
MAX
Method : Play back (FWD) the test tape and adjust
SFR101 so that the frequency becomes
3010Hz±10Hz. Then confirm WOW is less
than 0.50%.
2. GOVERNER Adjustment
Perform the STOP —> PLAY and REVERSE operations
(or PAUSE ON —> OFF) after the motor is replaced.
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 SFR101).
3) Restrict the motor rotation by hand (or turn PAUSE ON).
C
B
A
2
2
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
High
Low
Medium
Pattern
resistance
resistance
resistance
(A)
(B)
(C)
(Procedure
Solder
Open
Soder
1 above)
Step (1)
Open
Solder
Solder
Step (2)
Solder
Solder
Solder
(NOTE :
A
=10ohm ,
=2.7ohm ,
=4.7ohm)
B
C
7)
Finally re-check the tape speed.
Caution : Cool the patterns down to normal tempera-
ture after soldering. If the pattern remains
heated, the gorvernor circuit does not operate
normally.
<TAPE SECTION>
Tape speed :
3000Hz ± 60Hz
Wow :
Less than 0.5% (RMS)
Take-up torque :
24 ~ 45g-cm (FWD)
F.F torque :
70 ~ 150g-cm
REW torque :
70 ~ 150g-cm
Back tension :
1.5 ~ 4.0g-cm (FWD)
S/N ratio :
More than 42dB (PB, DC)
Distortion :
Less than 3.0% (PB, DC)
Noise level :
Less than 4.5mV
(Vol MAX, PB, DC)
Less than 0.45mV
(Vol MIN, PB, DC)
Frequency response :
63Hz + 1 / – 7dB ~ 8kHz + 4 / – 4dB
(NORMAL)
63Hz + 1 / – 7dB ~10kHz + 4 / – 6dB
(CrO2)
Test tape :
TTA– 100
TTA–320(NORMAL)
TTA–310(CrO2)
C
B
E
2SC2712
RN1411
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