Sony RMT-B101A - Power Supply Issues (Flowchart 2)

5-2
Flowchart No.2
The set does not start normally by power ON
Is about 5V supplied to connector CN100 28pin
(=Key 0) on FL board when Power key on the set
is pressed?
Is the symptom improved by replacingthe Power switch?
Yes
Yes
Replace the Power switch
Is the error code “
∗∗∗
ERR” displayed on FL tube?
Displayed
Is 5V supplied to connector CN6051 1pin on main board
by power ON?
No
Go to Flowchart No.1 “Power does not turn on”
Yes
No
Replace the Main Board
Is the fuse in each line on power board OK?
No
Yes
Check/replace the power harness (PM-145, PM-146).
If not improved by replacement, replace the Power board.
Replace the Power board.
If not improved by replacement, replace the Main board.
No No
See FL board flowchart 1
Not displayed
Yes
3V
5V
12V
12.5V
-15V
1.5V
P401
P302
P202
P401
P601
P501
Is respective voltages supplied to connector CN6002 &
CN6051 on main board?
CN6002 6pin 3V
CN6002 4pin 5V
CN6002 2pin 12V
CN6051 11pin 12.5V
CN6051 9pin -15V
CN6051 3pin 1.5V
Replace the Main board
Main Set, Power Supply Section