Teac A-3300SR - Output Level Setting; VU Meter Level Setting; Playback Frequency Response; Playback Signal-to-Noise Ratio

16
8-5 OUTPUT LEVEL SETTING
— MAXIMUM OUTPUT LEVEL CHECK —
10. Play the 400 Hz/O dB tone in section 1 of the Test Tape.
11. Turn the OUTPUT controls fully clockwise.
12. Adjust VR-201/203 for —2 dB (615 mV) at OUTPUT
jacks.
— SPECIFIED OUTPUT LEVEL SETTING —
13. Reduce both OUTPUT controls together until the lower
reading channel reads —8 dB. (approx. 2 o’clock position).
If there is a difference in level between L-ch and R-ch,
again adjust VR-201/203 (whichever is higher) for —8
dB (308 mV).
NOTE: This is the Specified Output level setting. Do not
disturb this setting until the remaining adjustments
have been completed.
2 o'clock
Position
T-1137
Fig. 8-4 Specified Output Level Setting
8-6 VU METER LEVEL SET
14. Adjust VR-202/204 for 0 VU reading on VU meters.
8-7 FREQUENCY RESPONSE (PLAYBACK)
15. Thread TEAC Test Tape YTT-1002 on the deck.
16. Play Tape and compare readings on VTVM with the re-
sponse limits given in Fig. 8-5.
17. If adjustment is required, adjust VR-102/104 for LOW
speed.
TAPE SPEEDSW ......... HIGH
18. Thread a Test Tape YTT-1003 on the deck. Repeat Step
16.
19. If adjustment is required, adjust VR-101/103 for HIGH
speed.
20. Depress Reverse Play ( ¢ ) button and check for suitable
output from both channels. See response limits given in
Fig. 8-5.
NOTE: If the frequency response does not meet specified
response limits, especially at the high-end of the
spectrum, head should be checked for accumulated
dirt or oxides. If clean, head azimuth must be re-
adjusted.
RESPONSE IN 68
4050 00 $00 mK 5K WK = 1Bk 22K BOK
FREQUENCY IN Hz
Fig. 8-5 Frequency Response — Playback —
8-8 SIGNAL-TO-NOISE RATIO (PLAYBACK)
1.
2:
OUTPUT controls should be at the Specified Output
Level settings.
Thread a blank Test Tape on the deck leaving the tape
outside the capstan and pinch roller.
. Hold the play supply reel stationary and depress the play
(> ) or ( @ ) button.
. The VTVM connected to the OUTPUT jacks should indi-
cated readings listed below, or better.
—57 dB, ormore .... HIGH (7-1/2 ips)
—55 dB,ormore .... LOW (3-3/4 ips)
NOTE: This corresponds to Signal-to-Noise Ratio of 49
dB (for HIGH) and 47 dB (for LOW): Difference
between residual noise of —-57 dB/—55 dB and
specified output level of —8 dB,