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2-3. TR-92 Board Adjustment
2-3-8. DATA Demodulation Circuit
Adjustment
Note :
• Use a plastic core driver to adjust 1LV.
Equipment
: Oscilloscope
Test Point
: TP50 (GND:E1)/TR-92 (G-3)
Adjustment Point : 1LV50/TR-92 (G-3)
: C = 4.9 ±0.1 Vdc
Specification
A
A
B
B
E80
TP80
E50
TP50
TP100
TP200
TP20
FL20
LV600
TP600
E600
LV400
TP400
E400
E850
LV850
TP850
TR-92 board (A side )
2-14(E)
C
GND
LV80
TP703
LV50
E100
E701
E200
RV600
RV400
2-3-9. H CONT Demodulation Circuit
Adjustment
Note :
• Use a plastic core driver to adjust 1LV.
Equipment
: Digital voltmeter or Oscilloscope
DC variable power supply
Frequency counter
Preparations :
• Set the POWER switch of the CA-57A/57AP to OFF.
• CCU-700/700P/700A/700AP setting
Extend the AT-88 board of the CCU.
Supply +2.5 Vdc to pin C19 (GND:E1)/extension board
(extending AT-88) from the DC variable power supply.
Observing the frequency counter, adjust the DC variable
power supply so that the frequency at TP1 (GND:E2)/
AT-88 (G-7) is 2.500 ±0.005 MHz.
Test Point
: TP81/extension board : EX-108
(extending TR-92)
Adjustment Procedures :
1. Set the POWER switch 6f CA-57/57AP to EXT.
2. Adjustment Point
Specification
:1LV80/TR-92 (H-3)
:2.5 ±0.2 Vdc
BKP-590
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