Mhz Trap Adjustment - Sony CA-550 Maintenance Manual

3-4. MD-103 Board Adjustment

3-4-11. 67.5 MHz TRAP Adjustment

Notes:
• This adjustment is necessary only when replacing FL3
on the MD-103 board.
• Use a plastic core driver to adjust 1FL.
Equipment : Spectrum analyzer
Test Point : Pin 53 (GND:E1/MD-103)/
extension board
(extending MD-103)
Adjustment Point : 1FL3 (67.5 MHz TRAP)/
MD-103 (C-2)
Adjustment Procedure :
Adjust 1FL3 so that the signal level around 67.5 MHz is
minimum.
CENT FREQ 67.5 MHz
SPAN 2.0 MHz
CA-550
CA-550P
Minimum
4 3
MD
A
B
PROMPT
GENLOCK
C
D
E
F
G
MD-103 BOARD (COMPONENT SIDE)
2 1
E1
FL3
3-15 (E)