Measurement And Adjustment - Teac A-7300RX Service Manual

10. MEASUREMENT AND ADJUSTMENT
—ELECTRICAL—
10-1 ADJUSTMENT LOCATIONS AND ADJUSTMENT POINTS
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ENCODER R M1 VR8I4 DECODER R
Adj. Component Adj. Component BIAS/EQ SW
VR-251/252 Playback Level Bias Le
VR-301/302 VU Meter (P. B) VR-709/710 Record Level
VR-203/204 Playback EQ (HIGH) Rec EQ (HIGH)
VR-201/202 Playback EQ (LOW) VR-501 (both ch) | Rec EQ (LOW #1
VR-401/402 Monitor Level
VR-707/708 VU Meter (monitor)
L-503/504 Bias Trap
L-251/252 Bias Leakage
L-552 Dummy Coil] Rec Mono (L or R)
VR-814/814 Encoder Level
VR-624/624 Decoder Level
Fig. 10-1 Ampli PC Board Location and Adjustment Points
10-2 ADJUSTMENT SEQUENCE CHART
PLAYBACK HEAD
PREPARATION || AZIMUTELADI.
-—— PLAYBACK PERFORMANCE —
SPECIFIED OUTPUT VU METER FREQUENCY |_| PHONES OUTPUT
LEVEL SETTING LEVEL SET | | RESPONSE CHECK
-—— MONITOR PERFORMANCE —
MIC INPUT VU METER SPECIFIED LINE MONITOR LEVEL
LEVEL CHECK LEVEL CHECK CONTROLS SETTING SETTING
RECORD HEAD MONOPHONC
AZIMUTH ADJ. RECORDING
— RECORD PERFORMANCE —
BIAS TRAP BIAS LEAKAGE BIAS RECORD FREQUENCY
ADJUSTMENT CHECK ADJUSTMENT LEVEL SET RESPONSE
dbx
DISTORTION
SIGNAL-TO-NOISE
CHANNEL
OPTIMUM ERASURE
PERFORMANCE CHECK RATIO SEPARATION MEASUREMENT
Fig. 10-2 Adjustment Sequence Chart
SIGNAL-TOWOISE
RATIO CHCK