Read JBL PULSE (serv.man2) Service Manual online
Figure 1 shows software loading circuit. Software is loaded via programmer and supply MCU
power directly. Power supplied via TP102, TP103，MCU reset signal from TP101，data
signal from TP104，clock signal from TP105
power directly. Power supplied via TP102, TP103，MCU reset signal from TP101，data
signal from TP104，clock signal from TP105
E101 Cannot load software, testing procedure：
1、Check if TP103 connected to MCU GND，if not connected, need to connect.
2、Check if TP101,TP102,TP104,TP105 connected to GND，They should not GND.
3、Check if TP101,TP102,TP103,TP104,TP105 connected to MCU pin18, 40, 6, 12, 13
they should be connected.
4、Check if MCU is solidered correctly.
5、Connect external 3.3V power to TP102, TP103 to test if any problem on 3.3V
6、If all of the above are OK, replace MCU IC U101.
1、Check if TP103 connected to MCU GND，if not connected, need to connect.
2、Check if TP101,TP102,TP104,TP105 connected to GND，They should not GND.
3、Check if TP101,TP102,TP103,TP104,TP105 connected to MCU pin18, 40, 6, 12, 13
they should be connected.
4、Check if MCU is solidered correctly.
5、Connect external 3.3V power to TP102, TP103 to test if any problem on 3.3V
6、If all of the above are OK, replace MCU IC U101.
4.1．Error code-E2
4.2．Testing procedure:
TP304、TP312 5V circuit shown in Figure 2. USB 5V connected to J301 via L311, L310 to
charge IC U304. MCU IC U101 pin1, 44, 35 to control IC U304 and IC U304 output charging
voltage on pin11, pin12.
TP304、TP312 5V circuit shown in Figure 2. USB 5V connected to J301 via L311, L310 to
charge IC U304. MCU IC U101 pin1, 44, 35 to control IC U304 and IC U304 output charging
voltage on pin11, pin12.
4. Testing station：Voltage test
JBL
PULSE Service Manual
Page 31 of 38
Click on the first or last page to see other PULSE (serv.man2) service manuals if exist.