Sony UWP-V1, Service Manual

Page: 23 / 164

2-3
UWP Series
S673
SET
S672
_
S671
+
CT621
LCD
CPU-422 board
(B side)
RF-131 board
(A side)
CN401
CN301
RV511
(Tone signal level adjustment)
RV441
(AF limiter adjustment)
RV491
(AF clipper adjustment)
RV521
(Reference frequency
deviation adjustment)
RV351
(RF output "H"
adjustment)
CT361
(Output efficiency
optimization)
RV341
(RF output "L"
adjustment)
Adjustment Location
1. Power Supply Voltage Check
Equipment and Tools
.
DC power supply
DC output voltage :
+
3.0
±
0.1 Vdc
. DC ammeter
. Digital volt meter (or Digital multimeter)
Switch and Control Setting
CPU-422 board
Transmission channel
U30 model ; 30-01 channel (566.125 MHz)
U42 model ; 42-01 channel (638.125 MHz)
CE62 model ; Group 00, 62-01 channel (798.125 MHz)
CE67 model ; Group 00, 67-01 channel (838.125 MHz)
KR model
; 59-01 channel (740.125 MHz)
Attenuation setting : 0 dB
Accumulated time setting : “00 : 00”
n
Take note of the settings before starting the confirmation
work.
After confirmation is completed, return the settings to
the original setting before change.
C24 ( + )
L12
GND
GND
GND
CPU-422 board (B side)
DC voltmeter
S11
Connections
(For connecting the DC power supply, refer to step
“3. Connecting the DC power supply” in Section 2-1-2.)
Procedure
1. Set the POWER switch (S11/CPU-422 board) to ON.
2. Check the DC Voltage of the + terminal on the C24/
CPU-422 board to the specified voltage as below :
Specification : C24 (
+
terminal) DC Voltage =
+
3.3
±
0.1Vdc
3. Check the DC voltage of the L12/CPU-422 board to the
specified voltage as below :
Specification : L12 terminal DC voltage =
+
5.0
±
0.1Vdc