Sony BVP-550, Руководство по обслуживанию

Страница: 459 / 924

2-1 (E)
BVP-550
Section 2
Service Overview
2-1. Notes on Service
2-1-1. Note on Replacement of Parts
Every component electrical part mounted on the PR-211
and CN-1142 boards cannot be replaced. And also a 68-pin
connector on the CN-1120/1121 board cannot be. If there
is any defective part, replace the mounted circuit board
itself.
The PR-211 board is provided with a termination board
CN-1142 on it. The CN-1142 board is necessary when the
PR-212 board of OHB-550WS/550WSP is not installed.
Unless the PR-212 board is installed, be sure to connect the
CN-1142 board to the PR-211 board.
2-1-2. Description of EEPROM Data
The table below gives the holding data of EEPROM on
every printed circuit board.
Board Ref. No. Holding data
VA-163 IC26 VA-163 adjustment data
AT-95 IC46 Triming/Reference files
SG-234 IC21 SG-234 adjustment data
DA-88 IC10 DA-88 adjustment data
IF-510 IC155 IF-510 adjustment data
MB-602 IC5 Model name, Serial number of the unit
n
The IC listed above cannot be replaced because it is the
EEPROM that is holding data inherent in the board. The
part number listed in Section 5 “Spare Parts” is for an
EEPROM which is not programmed. If replacement is
needed, consult your Sony representatives.
2-1-3. Extension Boards
The extension boards and harness are available separately
for check or adjustment of some printed circuit boards.
Extension Board/Harness Sony P/N To be extended
EX-464 J-6395-040-A VA-163
AT-95
SG-234
DA-88
IF-510
Plug-in boards for CA
2-1-4. Notes on Repair Parts
1.
w w
w w w
Safety Related Components Warning
Components marked
!
are critical to safe operation.
Therefore, specified parts should be used in the case of
replacement.
2. Standardization of Parts
Some repair parts supplied by Sony differ from those
used for the unit. These are because of parts common-
ality and improvement.
Parts list has the present standardized repair parts.
3. Stock of Parts
Parts marked with “o” at SP(Supply Code) column of
the spare parts list may be not stocked. Therefore, the
delivery date will be delayed.
4. Units Representation
The following represented units are changed or
omitted in writing.
Units Representation
Capacitance
µ
F uF
Inductance
µ
H uH
Resistance
Ω
Abbreviation