Adjustment & Test Point Location - Teac A-400 Service Manual

4-4, ADJUSTMENT & TEST POINT LOCATION
INPUT,
FOS Se | TR for VRio2(VR202)
(LINE IN} o sso
CNEL DOLBY TP PHONE PHONES
orec & > o
wr =<]
PLAY S | a
MIC
ue
Wh
vagal | O° © (uTeuT}
Reh 7,
METER PEAK LED DRIVE
A"
> = Ee PEAK
VRiI05 il g
R/PHEAD of LU- ~~~ -_-
5 OE PLAY
REC T-404
Fig. 49 Simplified Circuit Diagram
: TP GND
DOLBY TP (R~ch) DOLBY TR (L-ch)
vrio2 TR
eS Noon &
sao MS
BIAS TRAP TR BIAS TRAP T.R
Fig. 50 Adjustment Location A
(R-ch)
(L-ch)
Fig.51 Adjustment (and T.P.) Location B
VR101/VR201 Output level, L102/L202 MPX filter
VR102/VR202 Input level (Dolby calibration) L103/L203 Bias trap
VR103/VR203 Level meter calibration L104/L204 Record EQ (2)
VR104/VR204 Record level (2) L105/L205 Record EQ (1)
VR105/VR205 Record Sevel (1) VC303/VC301 Bias (2)
VR106/VR206 Peak level indicator adjustment VC304/VC302 Bias (1)