Teac A-6010GSL - Specified Output Level Set; VU Meter Calibration -Playback-; Playback Equalization Adjustment

19
SPECIFIED OUTPUT LEVEL SET
10.
i.
IMPORTANT: Unless otherwise specified, the EQ/LEVEL switch must
always be in the HIGH position during measurement and adjustment.
Play the 400 Hz tone in section 1 of the test tape. This tone is
recorded at operating reference level (1% of the THD level).
Turn the OUTPUT controls fully clockwise, and adjust VR-103/203 for
-2 dB reading on the test set.
Then turn OUTPUT controls(c.c.w.) until a -8 dB reading is obtained
on the test set. If equal VU meter reading cannot be obtained in
step 11, readjust VR-103/203 slightly.
OUTPUT
NOTE: This is the specified output
level setting. Do not disturb this d
setting until the remaining adjust- .
ments have been completed.
ax
5 mis. ote
Fig. 7-3 Specified Set Position
VU METER CALIBRATION -PLAYBACK-
12.
While playing the 400 Hz tone (1% THD) in section 1 of the test
tape, adjust VR-104/204 for a reading of 0 VU on the VU meter.
The EQ/LEVEL switch should be in NORMAL position.
HIGH level check: While playing back 400 Hz (operating reference
level) signal, move the EQ/LEVEL switch from HIGH to NORMAL posi-
tion, The VU meter should decrease 3 dB. This is a performance
check only. After checking, return EQ/LEVEL switch to HIGH
position.
FREQUENCY RESPONSE AND THE PLAYBACK EQUALIZATION ADJUSTMENT
13.
14.
15.
16.
17.
18.
Play section 3 of TEAC Test Tape YTT-1003 at 7-1/2ips (which was
recorded at 10 dB below the operating reference level).
Compare the readings with the response limits given in figure.
Adjust the equalization trimmer resistors VR-101/201 to obtain the
flattest possible response within +2 dB limits between 7.5 kHz and
15 kHz.
Play section 3 of TEAC Test Tape YIT-1002 at 3-3/4ips.
Compare the readings with the response limits given in figure below.
Adjust the equalization trimmer resistors VR-101/201 to obtain the
flattest possible response within +2 dB limits between 7.5 kHz and
10 kHz.
NOTE: During reverse play, the readings should be almost identical
with forward play. However, do not made any adjustments of the
trimmers during reverse play
7-3