
3-3
WRR-855B
3-2-1. TUN-8 Board Adjustment
Preparation
Before the adjustments, perform the followings.
• Remove the case and front panel.
• Remove the case lid (Precision
+
P1.7
x
2: 8) of the unit
assembly. (Refer to the ''2-1. Removal".)
1. Front-end Adjustment
Equipment and Tools
• DC power supply
+
7.0
±
0.1 Vdc
• Spectrum analyzer
• RF adjustment cable ( Part No. J-6400-680-A )
• Adjuster ( 0.4
x
1.3 mm ) : 1 ( Part No. 7-221-652-81 )
• Power supply/AF OUT connector
( Refer to the ''How to make power supply/AF OUT
connector" on page 3-1.)
Connection
Tracking
generator
ANT IN A
CN102
CN402
Case
Case
RF adjustment cable
(J-6400-680-A)
TUN-8 board
+
7.0
±
0.1 Vdc
ANT IN B
MUTING
POWER
+
–
BNC cable
(Coaxial cable 5D-2V, within 1m)
Power supply/AF OUT connector
DC power supply
Spectrum
analyzer
2
1
2
1
ANT IN A side
ANT IN B side
ANT IN A
ANT IN B
CT101
CT102
CT103
CT104
CT401
CT402
CT403
CT404
ANT IN A
ANT IN B
TUN-8 board
Adjustment Location
Switch and Control Setting
Channel setting:
CE21 model; Group 00, 22-32 channel (482.000 MHz)
CE33 model; Group 00, 34-32 channel (578.000 MHz)
CE62 model; Group 00, 63-32 channel (810.000 MHz)
CE67 model; Group 00, 68-32 channel (850.000 MHz)
U14 model; Group 00, 16-01 channel (482.125 MHz)
U30 model; Group 00, 32-01 channel (578.125 MHz)
U42 model : Group 00, 44-01 channel (650.125 MHz)
U62 model; Group 00, 64-01 channel (770.125 MHz)
U66 model; Group 00, 68-01 channel (794.125 MHz)
Procedure
Step1:
Preparation
Turn off the POWER switch of the WRR-855B, and
change the position of the soldering bridge to the printed
slit land on the TUN-8 board from
1
to
2
as shown
below.
Summary of Contents for WRR-855B
Page 1: ...UHF SYNTHESIZED TUNER UNIT WRR 855B SERVICE MANUAL 1st Edition Revised 2 ...
Page 4: ...2 WRR 855B 8 Schematic Diagrams TUN 8 8 1 CPU 342 8 8 DP 236 8 10 SW 814 8 10 ...
Page 10: ...1 6 WRR 855B Sony Corporation Printed in Japan ...
Page 38: ......
Page 58: ......
Page 67: ...7 1 WRR 855B 7 1 Section 7 Board Layouts ...
Page 83: ......
Page 84: ...Printed in Japan Sony Corporation 2006 6 16 2001 WRR 855B U CE E 9 976 898 03 ...