Teac A-2300SD - Electrical Measurement and Adjustment; Adjustment Locations

9. MEASUREMENT AND ADJUSTMENT
DECODERi .ENCODER!
&M02
iVR403
LVR4diy
LL4011
iVRlOSl
L channel/R channel
ADJUSTMENT IDENTIFICATION
The A-2300SD DOLBY DECODER and ENCODER adjust- * Adjust VR402/VR405 for CAL TONE SW at IN
ments themselves are critical and should only be performed * Adjust VR401/VR404 for CAL TONE SW at OFF
by skilled technicians. * Adjust L202/204 for minimum Bias leakage
Fig. 9-1 Adjustment Location - Bottom View -
9-1 ADJUSTMENT LOCATIONS
-ELECTRICAL-
Fig. 9-2 BIAS OSC P.C.B. Adj. Location
Lower right side of chassis (see REAR VIEW on p5)
R ^ L
1 #
DOLBY 1
CALTONE FM/COPY
1VR505/502
1 I «N
0 2 0
1 ( ON
IVR506/503
OFF
OUT
# 0
m
m
|VR504/50ll
VR101/VR105-PB.GAIN adj.
VR201/VR203 — (LAW)
* VR402/VR405- — Meter Cal.
VR103/VR107-PB. Eq. (Low)
VR202/VR204— (GAIN) VR403- -CAL TONE Level cal.
VR102/VR106-PB. Eq. (High)
VR104/VR108--REC GAIN adj.
VR301/VR303 —(LAW)
VR302/VR304 —(GAIN)
*VR401/VR404 — Meter Cal.
L402/L404-Rec Eq. adj.
L401/L403 Bias Trap
L ch/R ch
VR502/VR505-Rec Level 1
VR503/VR506-Rec Level 2
VR501/VR504-Dolby NR
Fig. 9-3 Back panel Adj. Location
L ch/R ch _
VC21/VC20
VR20-
L20-
-Bias adj.
REC BIAS SW at 1
-Bias adj.
REC BIAS SW at 2
for both channels
-Dummy coll
for mono Recording
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