Sony MCC3000MT, Service Manual

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1-11. Note on Service
1-11-1. Requirements on Replacement of Boards or Parts
This section explains the necessary setups required when replacing boards or parts.
When any of the following boards is replaced, upgrade the firmware version.
All data are written at once when upgrading the firmware version. (Refer to
“1-8. Updating the Firmware” .)
Board Name Ref. No.
AVP-18 board IC114, IC708, IC1300
DPR-340 board IC406
KY-687 board IC101
Note
The user setting values are stored in IC819 on the AVP-18 board. When the AVP-18 board is replaced, the user setting
values are lost.
1-11-2. Description of Number Seal on the Prism
The number seal is put in the prism unit, the serial number of prism unit. Every prism unit has its own number called
prism serial number.
1-11-3. Fuse and IC Link Replacement
WARNING
Fuses and IC links are essential parts for safe operation. Be sure to use the parts specified in this manual.
Replacing any fuse or IC link with an unspecified one may cause fire or electric shock.
CAUTION
Replacing any fuse or IC link is replaced while power is supplied to the unit may cause electric shock.
Before replacing any fuse or IC link, turn off the POWER switch and also disconnect the battery pack and
the cable from the DC IN connector.
This unit is equipped with fuses and IC links. The fuses and IC links blow if overcurrent flows in the unit due to an
abnormality, In that case, turn off the power of the unit, inspect inside of the unit, and then remove the cause of the
overcurrent. After that, replace the defective parts.
Board Name Ref.No. Address Part No. Rating
APV-18 board F900 E-2 (Side A)
1-533-627-21
5 A/125 V
PS600 A-2 (Side A)
1-576-677-21
4 A/72 V
PS601 A-3 (Side A)
1-576-677-21
4 A/72 V
RE-309 board F001 B-1 (Side A)
1-576-269-21
3.15 A/125 V
1-11-4. Circuit Protection Element
This unit is equipped with positive-characteristic thermistors (power thermistors) as circuit protection elements.
The positive-characteristic thermistor limits the electric current flowing through the circuit as the internal resistance
increases when an excessive current flows or when the ambient temperature increases.
MCC-3000MT
1-19