Sony PDW-HD1500 Maintenance Manual page 26

(2) Replacing Memory Backup Battery (IC2907/
HPR-23 board)
A crystal oscillator incorporating a backup battery is
attached to IC2907 on the HPR-23 board.
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When replacing the part, be sure to use the specified one
below.
Use of an unspecified part may result in burst, fire or heating.
Replacement part
Model: M4T28-BR12SH1
(lithium battery integrated crystal oscillator)
! 1-767-156-11
Part No.:
Recommended replacement cycle:
10 years
Replacement
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When replacing the battery, install a new battery in correct
orientation of the mark.
1. Take note of the following setting data, if possible.
. SYSTEM SEL setting data of the setup menu
. CLIP INFORMATION setting data
. NUMERIC data of CLIP TITLE
. Error log data
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Taking note of these data before replacement facili-
tates re-setting of menu data and other data after
replacement of the battery. However, no error log data
can be restored.
2. Turn off the power of the unit.
3. Remove the HPR-23 board. (Refer to Section 6-12-9.)
4. Remove the ENC-107 board.
5. Insert a flat-blade screwdriver between the battery and
IC2907 and detach the battery.
Battery
IC2901
(address: H-2)
1-18
Mark
HPR-23 board
6. Install a new battery matching its mark with the mark
on IC2907.
7. Install the ENC-107 board.
8. Install the HPR-23 board.
9. Turn on the power of the unit while pressing the
[MENU] and [RESET] buttons simultaneously.
When "ALL RESET" appears, release your fingers
from the keys.
10. Press the [SET] button.
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Fixed values of the ROM is used for initialization data.
11. Restart the unit.
12. Perform the settings again using the data noted in step
1.
13. Perform the settings the current date and time.
(3) Replacing NV-RAM (IC2907/HPR-23 board)
Replace IC2907, after detaching the battery. The other
replacement steps are the same as those in (2) Replacing
Memory Backup Battery (IC2907/HPR-23 board).
(4) Replacing EEPROM (IC2701/HPR-23 board)
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Even if this EEPROM is replaced in the field, no data can
be initialized. When you need to replace this EEPROM,
contact your local Sony Sales Office/Service Center.
(5) Replacing EEPROM (IC4/SE-850 board)
1. Turn off the power of the unit, and then remove the
SE-850 board. (Refer to Section 6-12-12.)
2. Replace IC4 (side A).
3. Install the SE-850 board, and then turn on the power of
the unit.
4. Perform UPLOAD TO EEPROM of the MAINTE-
NANCE MENU. (Refer to Section 4-7-25.)
(6) Replacing EEPROM (IC1301/AU-311 board)
n
Even if this EEPROM is replaced in the field, no data can
be initialized. When you need to replace this EEPROM,
contact your local Sony Sales Office/Service Center.
(7) Replacing EEPROM (IC912/AU-311 board)
1. Turn off the power of the unit, and then remove the
AU-311 board. (Refer to Section 6-12-1.)
2. Replace IC912 (B-3/side B).
3. Install the AU-311 board, and then turn on the power
of the unit.
4. Audio system adjustment (Refer to Section 8-6.)
PDW-HD1500/V1 (E)