Sony MEX-BT38UW Service Manual page 5

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.
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.
NOTE FOR REPLACEMENT OF THE USB CONNECTOR
(CN902)
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.
USB connector
front panel
Replacing the lithium battery of the card remote
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.
c
2
1
Notes on the lithium battery
• 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 may occur.
WARNING
Battery may explode if mistreated.
Do not recharge, disassemble, or dispose of
in fire.
KEY board
+ side up
MEX-BT38UW/BT3800U/BT3807U/BT3850U
MODEL IDENTIFICATION
– Bottom View –
Model Number Label
Part No.
BT3800U: US and Canadian models
4-160-362-0[]
BT38UW
4-160-363-0[]
4-160-364-0[] BT3800U: AEP and UK models
4-160-365-0[] BT3807U
4-160-366-0[] BT3850U: E model
4-160-367-0[] BT3850U: Saudi Arabia model
Part No.
Destination
5