Panasonic AWSW350P - SWITCHER, Service Manual

Page: 14 / 70

ELE-3
5. G/L SCH Adjustment
BOARD MAIN
TP -----
ADJ. VR3(NT HD),VR2(PAL HD)
SIGNAL Black Burst Signal
M. EQ -----
SPEC. Variable mid-point
1. Set the SET UP switch SW1 and SW2 to the lower
side (FS OFF, G/L IN).
2. Supply a black burst signal to the G/L IN connector
from a signal Generator.
3. <NTSC Model>
1) Rotate the VR3 (NT HD) to either direction and
Inspect the variable range where the D3 (SCH)
indicator light-up
2) Set VR3 at the center position where the D3
(SCH) light up.
4. <PAL Model>
1) Rotate the VR2 (PAL HD) to either direction and
Inspect the variable range where the D3 (SCH)
indicator light-up
2) Set VR2 at the center position where the D3
(SCH) light up.
6. INT Frequency Adjustment
BOARD MAIN
TP TP14
ADJ. VR4
SIGNAL -----
M. EQ Frequency Counter
SPEC. 27MHz
±
10Hz
1. Be sure to warm up the unit for at least 10 minutes
after turning it on.
2. Disconnect the black burst signal to the G/L input
connector.
3. Connect the frequency counter to TP14 on the
MAIN board and adjust VR4 so that the frequency
is within the specification.