Sony UWP-V1 Service Manual page 38

4. Reference Frequency Deviation
Adjustment
Equipment and Tools
. DC power supply
DC output voltage : +3.0 ± 0.1Vdc
. DC ammeter
. Audio analyzer
. Modulation analyzer
MEASUREMENT
MEASUREMENT RANGE : AUTO or ± 10 kHz
HPF
LPF
DE EMPHASIS
. Adjustor (SONY part No. 7-721-052-81)
. MM-SMA conversion connector
(SONY Part No. J-6402-490-A)
. SMA-BNC conversion connector
(SONY Part No. J-6402-480-A)
Switch and Control Setting
MB-1137 board
Transmission channel
U30 model ; 32-01 channel (578.125 MHz)
U42 model ; 42-01 channel (650.125 MHz)
CE62 model ; Group 00, 63-32 channel (810.000 MHz)
CE67 model ; Group 00, 68-32 channel (850.000 MHz)
KR model ; 60-01 channel (746.125 MHz)
Attenuation setting :
Accumulated time setting : "00 : 00"
n
Note down the setting position before the adjustment.
After the Adjustment complete, set the original position.
2-18
: FM
: 50 Hz
: 20 kHz or 15 kHz
: 50 usec
0 dB
Connections
(For connecting the DC power supply, refer to step
"3. Connecting the DC power supply" in Section 2-2-2.)
MB-1137 board (B side)
Modulation
analyzer
MM-SMA conversion connector and
CN101
SMA-BNC conversion connector
Audio analyzer
Oscillator
CN2
MB-1137 board
(B side)
Solder
Procedure
1. Input 1 kHz, _60 dBV (_57.8 dBm) signal to the MIC
INPUT connector (with Mic input cable).
(0 dBV = 1 Vrms)
2. Connect a modulation analyzer to the antenna terminal
(CN101) via the MM-SMA conversion connector and
the SMA-BNC conversion connector.
3. Adjust 1RV101 so that the frequency deviation for the
modulation analyzer reading meets the following speci-
fication.
Specification : Frequency deviation = ± 7 kHz ± 0.1 kHz
Adjustment : 1RV101/MB-1137 board (A side)
(Refer to page 2-16 for the adjustment location.)
Oscilloscope
Level meter
BNC connector
GND
HOT
Lead wires
CN 2
C2
2 1
THP301
FL1
R9 R310
R15
C305
Q304
R18
R302
R19
R20
R41 D2
R75
R36 Q303
4 1 IC 3 C203
UWP Series