Sony BKDS-PA3291, Maintenance Manual

Page: 56 / 140

4-8(E)
BVS-A3232
• Switch Setting
Set all of the following switches to ON position for setting of the terminal resistance value to 600
Ω
.
COR1 to COR16 on the HN-237 board
COR1 to COR16 on the HN-238 board
(Factory setting: All ON)
As for the adjustments of OUT 2 through OUT 32, connect the audio-level meter to each connector (OUT 2 to OUT 32) to
be adjusted. (Refer to Section 4-3-1.) Adjust audio level of the respective channels in the same way.
4-3. MX-82 Board
Adjustment Conditions (For OUT 1)
• Connect output of an audio signal
generator to IN 1. Connect an audio-level
meter to OUT 1.
Adjustment Point
1
RV1 on OPM-24 board
(U20)
Specification
• Adjust RV1 for +4
±
0.1 dBm (1.228
±
0.014 V)
on audio-level meter.
HN-237 board
COR4~COR16
COR1~COR3
OFF ON
HN-238 board
COR1~COR16
OFF ON