Teac A-650 - Recording Performance Adjustments (Continued); Record Level Setting Procedure; Distortion Checks for All Tape Types

6-4-3. RECORD LEVEL SETTING
6-4-4. DISTORTION CHECKS
Preparations:
AMP SPKR
DISTORTION ANALYZER
OSCILLATOR
2.
o
o o o
3.
4.
>
5.
Fig. 6-15
Connection
Test tape:
Switch Setting:
BIAS
EQ
LIMITER DOLBY NR
OUT OUT OUT
1
1
Test tape:
27
Specification:
2.5% or less (w/ 3 types of tape)
Load a TEAC MTT-505B test
tape.
Apply and record a 400 Hz test
tone at — 12 dB (194 mV).
Rewind and play this recorded
section.
Read tire indicated value on the
distortion analyzer.
Control Setting:
OUTPUT: Specified Setting (See 6-2-2)
Specified Setting (See 6-3-2)
Minimum Setting
DECK
under TEST
LINE:
MIC:
Hi-Fi TAPE
30. Repeat the preceding procedure, with the following
exceptions.
B1AS/EQ switches: “ 3" position
Test tape: MTT-501
Adjustments. VRI05/205
VTVM
E
o o
LINE IN
IL >
F r T
OSCILLOSCOP E
O s
• «
OUTPUT
< LI
Hi-Fi TAPE
6. Repeat the above “ CrO 2 TAPE ”
procedure, with the following ex 
ceptions.
B1AS/EQ switches:
“ 3 ” position
MTT-501
Fe-Cr TAPE
Repeat the above procedure, with
the following exceptions.
BIAS/EQ switches:
“ 2 ” position
MTT-504
CrO 2 TAPE
1.
Fe-Cr TAPE
29. Repeat the preceding procedure, with the following
exceptions.
BIAS/EQ switches: “ 2 ” position
Test tape: MTT-504
Adjustments: VR1 06/206
L —
ATTENUATOR
CrO, TAPE
24. Load a TEAC MTT-505B test tape and set the BIAS/
EQ switches to the “ 1 ” position.
25. Apply and record a 400 Hz test signal at — 9 dB (274
mV).
26. Rewind and play this recorded section.
27. Adjust VR107/207 to obtain -5 dB (435 mV) at
deck ’ s output.
28. Continue the process of the recording-rewinding-
playing-adjusting until this — 5 dB is obtained.