Sony WRT-807B, Service Manual

Page: 19 / 64

3-3
WRT-807B (U/CE)
Switch and Control Initial Setting
The following initial setting is to be perform with the SET
switch (S202), “
+
” switch (S200) and “
_
” switch (S201).
Transmitting Channel setting:
CE57 model ; Group 00, 58-32 channel (770.000 MHz)
CE62 model ; Group 00, 63-32 channel (810.000 MHz)
CE67 model ; Group 00, 68-32 channel (850.000 MHz)
U30 model
; 32-01 channel (578.125 MHz)
U42 model ; 44-01 channel (650.125 MHz)
U62 model ; 64-01 channel (770.125 MHz)
U66 model ; 68-01 channel (794.125 MHz)
Attenuation setting : 0 dB
Accumulated time setting : “00 : 00”
Adjustment Location
3-2-1. Power Supply Voltage Check
Equipment and Tools Required
DC power supply
DC output voltage : + 1.5
±
0.1 Vdc
DC ammeter
DC volt meter (or Digital multimeter)
Adjuster (Part No. 7-721-052-81)
Switch and Control Setting
Same as “Switch and Control Initial Setting” on page 3-3.
Procedure
(1) Set the POWER switch (S101) on the MB-860 board to
ON.
(2) Check the DC Voltage of the L102 terminal to the spec-
ified voltage as below :
Specification : DC Voltage at L102 terminal
=
+
3.0
±
0.1 Vdc
(3) Check the DC voltage of the L101 terminal to the spec-
ified voltage as below :
Specification : DC voltage at L101 terminal
=
+
5.0
±
0.1 Vdc
VCC
RV301
S200
(
+
)
CT200
S101
(POWER)
RV302
S201 (
_
)
S202 (SET)
ON
GND
CT301
CN305
RV305
RV304
RV303
CN-1868 board
DP-306 board
MB-860 board (B side) MB-860 board (A side)
C376
R366
C369
R401
L102
C108
L101
T101
T102
C109
C107 C117
C102 C101
R117
C364
C366
C 3 8 3 C 3 8 4
R 1 0 8
C 3 8 6
I C 1 0 1 I C 1 0 2
C 3 3 4
L 1 0 2
P 3 0 1
R 3 9 5
Frequency counter
+
_
MB-860 board (B side)
L101
GND
L102