Incom Deviation Adjustment; Data Rf Adjustment - Sony CA-550 Maintenance Manual

3-3. TR-90 Board Adjustment

3-3-6. INCOM DEVIATION Adjustment

Equipment : Spectrum analyzer
Audio generator
Preparations :
• SW1 (INCOM MIC SEL)/AU-211 panel→ D
• Feed an 1.0-kHz, -60 dBu (2.2 mVp-p) sine wave signal
from the audio generator to the INCOM connector on the
CA-550/550P. (Refer to Section 3-1-3 "Connection —
For audio adjustments".
Test Point : TP1/TR-90 (E-2)
Adjustment Point : 1RV1 (INCOM DEV)/TR-90 (E-4)
: A = 20.0 ±0.8 kHz
Specifications
CENTER FREQ 7.1 MHz
SPAN 50 kHz
RBW 1 kHz
Note :
After the adjustment is complete, be sure to return SW1/
AU-211 to C position.
3-6 (E)

3-3-7. DATA RF Adjustment

Note :
• Use a plastic core driver to adjust 1LV.
Equipment : Spectrum analyzer
Test Point : TP5/TR-90 (F-2)
Adjustment Point : 1LV4 (5.6 MHz)/TR-90 (F-2)
: Center frequency 5,600 ±5 kHz
Specifications
CENTER FREQ 5,600 kHz
SPAN 100 kHz
RBW 1 kHz
4
TR
A
B
C
D
RV1
E
F
G
TR-90 BOARD (COMPONENT SIDE)
3 2 1
TP1
TP5
LV4
CA-550
CA-550P