Sony UWP-V1, Service Manual

Page: 82 / 164

2-62
UWP Series
3. Adjust
1
RV1 so that the frequency deviation for the
modulation analyzer reading meets the following speci-
fication.
Specification : Frequency deviation =
±
35 kHz
±
0.5 kHz
Adjustment :
1
RV1/MB-1094 board (A side)
4. Input 1 kHz, _ 5 dBV ( _ 2.8 dBm) signal to the MIC
INPUT connector (with Mic input cable).
5. Adjust
1
RV2 so that the frequency deviation for the
modulation analyzer reading meets the following speci-
fication.
Specification : Frequency deviation =
±
40 kHz
±
0.5 kHz
Adjustment :
1
RV2/MB-1094 board (A side)
6. Distortion Ratio Check
Equipment and Tools
.
DC power supply
DC output voltage : + 3.0
±
0.1Vdc
. DC current meter
.
Audio analyzer
.
Modulation analyzer
MEASUREMENT : FM
MEASUREMENT RANGE : AUTO or
±
40 kHz
HPF : 50 Hz
LPF : 15 kHz or 20 kHz
DE EMPHASIS : 50 u sec
. Oscilloscope
.
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-1094 board
Transmission channel
U30 model ; 32-01 channel (578.125 MHz)
U42 model ; 44-01 channel (650.125 MHz)
U6264 model ; 64-01 channel (770.125 MHz)
U6668 model ; 68-01 channel (794.125 MHz)
CE62 model
; Group 00, 63-32 channel (810.000 MHz)
CE67 model ; Group 00, 68-32 channel (850.000 MHz)
Attenuation setting : 0 dB
Accumulated time setting : “00 : 00”
MIC/LINE Select Switch (S1) : MIC
n
Take note of the settings before starting the confirmation
work.
After confirmation is completed, return the settings to
the original setting before change.
5. Maximum Frequency Deviation
Adjustment
Equipment and Tools
.
DC power supply
DC output voltage : + 3.0
±
0.1Vdc
. DC ammeter
.
Audio analyzer
.
Modulation analyzer
MEASUREMENT : FM
MEASUREMENT RANGE : AUTO or
±
100 kHz
HPF : 50 Hz
LPF : 15 kHz or 20 kHz
DE EMPHASIS : 50 u sec
. Oscilloscope
.
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-1094 board
Transmission channel
U30 model ; 32-01 channel (578.125 MHz)
U42 model ; 44-01 channel (650.125 MHz)
U6264 model ; 64-01 channel (770.125 MHz)
U6668 model ; 68-01 channel (794.125 MHz)
CE62 model
; Group 00, 63-32 channel (810.000 MHz)
CE67 model ; Group 00, 68-32 channel (850.000 MHz)
Attenuation setting : 0 dB
Accumulated time setting : “00 : 00”
MIC/LINE Select Switch (S1) : MIC
n
Note down the setting position before the adjustment.
After the Adjustment complete, set the original position.
Connections
. Same as “4. Reference Frequency Division adjustments”.
.
For connecting the DC power supply, refer to step
“3. Connecting the DC power supply” in Section 2-6-2.
Procedure
1. Input 1 kHz,
_
30 dBV (
_
27.8 dBm) signal to the AF IN-
PUT 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.