Read Sony MEX-BT4700U / MEX-BT4750U Service Manual online
MEX-BT4700U/BT4750U
4
NOTE FOR REPLACEMENT OF THE BT BOARD
When repairing, the complete BT board (Part No. A-1641-142-A)
should be replaced since any parts in the BT board cannot be re-
paired.
When repairing, the complete BT board (Part No. A-1641-142-A)
should be replaced since any parts in the BT board cannot be re-
paired.
NOTE FOR REPLACEMENT OF THE SERVO BOARD
When repairing, the complete SERVO board (Part No. A-1554-
409-A) should be replaced since any parts in the SERVO board
cannot be repaired.
When repairing, the complete SERVO board (Part No. A-1554-
409-A) should be replaced since any parts in the SERVO board
cannot be repaired.
NOTE FOR REPLACEMENT OF THE USB CONNECTOR
(CN971)
To replace the USB connector requires alignment.
1. Insert the USB connector into the front panel.
2. Place the KEY board on the front panel and align the terminals
(CN971)
To replace the USB connector requires alignment.
1. Insert the USB connector into the front panel.
2. Place the KEY board on the front panel and align the terminals
of the USB connector with the holes in the KEY board.
3. Solder the six terminals of the connector.
Replacing the lithium battery of the card remote
commander
commander
Under normal conditions, the battery will last approximately 1 year.
(The service life may be shorter, depending on the conditions of use.)
When the battery becomes weak, the range of the card remote commander
becomes shorter. Replace the battery with a new CR2025 lithium battery.
Use of any other battery may present a risk of fire or explosion.
(The service life may be shorter, depending on the conditions of use.)
When the battery becomes weak, the range of the card remote commander
becomes shorter. Replace the battery with a new CR2025 lithium battery.
Use of any other battery may present a risk of fire or explosion.
Notes on the lithium battery
• Keep the lithium battery out of the reach of children.
• Keep the lithium battery out of the reach of children.
Should the battery be swallowed, immediately consult a doctor.
• Wipe the battery with a dry cloth to assure a good contact.
• Be sure to observe the correct polarity when installing the battery.
• Do not hold the battery with metallic tweezers, otherwise a short-circuit
• Be sure to observe the correct polarity when installing the battery.
• Do not hold the battery with metallic tweezers, otherwise a short-circuit
may occur.
+ side up
D
WARNING
Battery may explode if mistreated.
Do not recharge, disassemble, or dispose of in fire.
Do not recharge, disassemble, or dispose of in fire.
– Bottom View –
Part No.
Model Number Label
MODEL IDENTIFICATION
Part No.
Destination
4-130-436-0
[]
BT4700U: AEP and UK models
4-130-437-0
[]
BT4700U: Russian model
4-130-438-0
[]
BT4750U: E model
4-130-439-0
[]
BT4750U: Indian model
4-130-440-0
[]
BT4750U: Mexican model
4-130-441-0
[]
BT4750U: Saudi Arabia model
KEY board
USB (socket) connector
front panel
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