S/N Checking - Sony WRR-805A Service Manual

(5) Turn ON the WRR-805A POWER switch (S501).
(6) Release (open) the jumper wire from the TP604 (land)
on the MB-861 board (A side), and check that the
following indication on the LCD appears as follows :
LCD display : "C 1 x x"
x x : About 3D to 58 (Hexadecimal)
(7) Change the FREQUENCY of the signal generator as
follows :
FREQUENCY (carrier frequency)
CE62 model : 806.000 MHz
CE69 model : 858.000 MHz
AU66 model : 799.000 MHz
(8) Short-circuit between TP604 (land) on the MB-861
board and GND (battery "_" terminal)with a jumper
wire.
(9) Release (open) the jumper wire from the TP604 (land) on
the MB-861 board (A side) , and check that the
following indication on the LCD appears as follows :
LCD display : "C 2 x x"
x x : FAbout 3D to 58 (Hexadecimal)
(10)Change the FREQUENCY of the signal generator as
follows :
FREQUENCY (carrier frequency)
CE62 model : 811.000 MHz
CE69 model : 861.000 MHz
AU66 model : 804.000 MHz
(11)Short-circuit between TP604 (land) on the MB-861
board and GND (battery "_" terminal)with the jumper
wire.
(12) Release (open) the jumper wire from the TP604 (land)
on the MB-861 board (A side) , and check that the
following indication on LCD appears as follows:
LCD display : "C 3 x x"
x x : About 3D to 58 (Hexadecimal)
(13)Short-circuit between TP604 (land) on the MB-861
board and GND (battery "_" terminal) with the jumper
wire.
The WRR-805A Power is automatically turned OFF
and then ON.
3-6

3-2-4. S/N Checking

Equipment and Tools Required
DC power supply : +3.00 Vdc ± 0.02 V
Signal generator
Function generator
Audio analyzer with A-weighted filter
Mic amp (Noise mete)
Oscilloscope
MM-SMA conversion connector (Part No. J-6402-480-A)
SMA-BNC conversion connector (Part No. J-6402-490-A)
AF Input/Output cable (Sony K-1334 or equivalent)
Connection
Signal NM - SMA conversion connector
with SMA - BNC conversion connector
generator
Function
generator
OUTPUT
Mic amp
AF Input/Output cable
Audio
analyzer
(with A-weighted filter)
Osilloscope
Antenna input (J101)
_
+
MB-861 board (B side)
WRR-805A (CE, AU)