Sony WLL-CA55, Руководство по обслуживанию

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2-2 (E)
WLL-CA55
2-2-2. PS-668 Board
Tool
Digital multi meter: Advantest R6441B or equivalent
Preparations
1. Set the DC LINE switch of the unit to OFF, then open
the R panel assembly to remove the L panel assembly.
(Refer to Section 1-3.)
2. Set only the DC LINE switch of the unit to ON, and
warm up the unit for about ten minutes.
Checking Procedures
Check the output voltage of each power supply line.
Output voltage Specification Test point (GND)
+ 1.5 V + 1.5
±
0.1 V dc CN28-3pin/MB-1022
(CN28-8pin/MB-1022)
+ 1.8 V + 1.8
±
0.1 V dc CN28-1pin/MB-1022
(CN28-8pin/MB-1022)
+
2.5 V
+
2.5
±
0.1 V dc CN27-10pin/MB-1022
(CN27-1pin/MB-1022)
+ 3.3 V + 3.3
±
0.1 V dc CN27-7pin/MB-1022
(CN27-1pin/MB-1022)
+ 5 V + 5
±
0.2 V dc CN27-5pin/MB-1022
(CN27-1pin/MB-1022)
+ 9 V + 9
±
0.2 V dc W14/PS-668
(Screw shown in the figure)
_
5 V
_
5
±
0.15 V dc CN28-5pin/MB-1022
(CN28-8pin/MB-1022)
Setting after Checking
Reattach the L panel assembly and close the R panel
assembly. (Refer to Section 1-3.)
CN27
CN28
DC IN2
CN27
+ 2.5 V
(CN27-10pin)
+ 3.3 V
(CN27-7pin)
+ 5 V
(CN27-5pin)
+ 1.5 V
(CN28-3pin)
+ 1.8 V
(CN28-1pin)
_ 5 V
(CN28-5pin)
GND
1
8
11
0
CN28
DC IN1
MB-1022 board
Transmitter
PS-668
board
Transmitter
PS-668
board
+ 9 V (W14)
GND
(screw)