Electrical Adjustments - Sony SA-WSLF1 Service Manual

DIAT SIGNAL RF LEVEL ADJUSTMENT
This adjustment is performed in order to adjust the transmission
distance of RF signal for DIAT communication.
Connection:
DIAT TRANSMITTER
board
TP815
(RF AMP OUT)
Procedure:
1. Connect the oscilloscope to TP815 (RF AMP OUT) and GND
on the DIAT TRANSMITTER board.
2. Connect DIR-T1 to DIR-T1 jack (J908).
3. Adjust RV801 on the DIAT TRANSMITTER board so that
the center of waveform becomes Trig level 1.05 Vp-p.
(*Trigger position: –4 div)
4. Confirm trigger is locked.
5. Adjust RV801 on the DIAT TRANSMITTER board so that
the center of waveform becomes 2.2 to 2.4 Vp-p.
RF Signal Reference Waveform
Adjustment Location:
– DIAT TRANSMITTER Board (SIDE A) –
IC804
SECTION 3
ELECTRICAL ADJUSTMENT
oscilloscope
VOLT/DIV : 500 mV
TIME/DIV : 500 ns
level : 2.2 to 2.4 Vp-p
IC805
TP815
(RF AMP OUT)
SA-WSLF1
7