Teac A-3300SR - Monitor Level Setting; Specified Line Control Setting; MIC Input Level Check; Headphone Output Check

MONITOR PERFORMANCE
8-9 MONITOR LEVEL SETTING
OUTPUT SW ........... SOURCE
1. Turn LINE controls fully clockwise.
2. Apply a 400 Hz —18 dB (97 mV) signal from AF oscil-
lator to LINE IN jacks.
3. Adjust VR-301/VR-304 for —8 dB (308 mV) at the
OUTPUT jacks.
OSCILLOSCOPE
OSCILLATOR
DECK
under TEST
T-390-1
Fig. 8-6 Test Connections for Monitor Check
8-10 SPECIFIED LINE CONTROL SETTING
4. Apply a 400 Hz signal at —8 dB (308 mV) to the LINE
IN jacks.
5. Adjust LINE controls for —8 dB (308 mV) at OUTPUT
jacks.
NOTE: At this point both the LINE controls and the
OUTPUT Controls are at the “Specified setting”.
Do not move these controls unless instructed in
this procedure to do so. The accuracy of many of
the following adjustments and readings depends on
these controls being at the “Specified setting”.
8-11 VU METER LEVEL CHECK
6. Check VU Meters for 0 VU indication.
7, Adjust VR-302/305 for 0 VU, if necessary.
8-12 MIC INPUT LEVEL CHECK
This is check only, no adjustments are to be made.
1. Apply a 400 Hz signal at —70 dB (0.244 mV) to the MIC
Input jacks (on front panel).
2. Check for —8 dB +2 dB (244 mV ~ 388 mV) at OUTPUT
jacks. When MIC Land R controls are at MAX. position.
3. Change the Input signal to —60 dB Level (0.774 mV).
4. Adjust MIC Level controls L and R for —8 dB (380 mV)
at the OUTPUT jacks.
5. Return MIC Level controls fully counter clockwise
(min.) to prevent noise insertion during following steps.
8-13 HEADPHONE OUTPUT CHECK
1. With the controls set as described in Step 8-5, connect
an 8 ohm non-inductive resistor across the head phone
(PHONE) jack.
2. Connect VTVM across the resistor while playing back
operating
level
on
Test
Tape.
VTVM
should
indicate
—24
dB
+2
dB
(61.5
mV~38.8
mV).
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