Sansui 6060 - 2) MPX Adjustment

2) MPX Adjustment
FEED SIGNAL
FROM TO
98MHz ANT terminal} Stereo
ANT Input 60dB 3000 indicator
FM SSG
Pilot 19kKHz
(10% MOD)
L-CH 1kHz
(45% MOD)
R-CH (0% MOD)
STEREO SG
MEASURE
OUTPUT
STEP SUBJECT
4. | PLL
VCO Adj.
ADJUST
VROS5
F-2590
ADJUST
FOR
Light indicator
CONDITION
Adjust the VR
within center of
lighting level.
TPOS
F-2590
Use Freq.
counter
PLL Make short
VCO Adj. between
In case of TP04 &
using Freq. chassis
counter.
VRO5
F-2590
76kHz
+200Hz
For this adjustment,
run the unit over
30 seconds.
ANT terminal] REC OUT L-CH
VTVM& Scope
98MHz
ANT Input 60dB 3002
FM SSG
Pilot 19kHz
(10% MOD)
L-CH (0% MOD)
R-CH 1kHz
(45% MOD)
STEREO SG
2. | Separation
VRO4
F-2590
Min. Output
—35dB
Confirm separation
L-CH->R-CH
—35dB
Stereo
indicator
Same as
above
3. Muting 98MHz
level & ANT Input 23dB
indicator FM SSG
level Pilot 19kHz
(10% MOD)
L-CH 1kHz
(45% MOD)
R-CH (0% MOD)
STEREO SG
Adjusting or Connecting Points on AM,
FM & FM MPX circuit board, F-2590
Fig. 3-3
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VRO2 VRO3
O TPOS
VROS
CFO4
VRO3
F-2590
Muting level
23dB
Indicator
lighting level
23dB