Kenwood NX-3220 K Service Manual page 152

Check the TX-RX UNIT PCB Side A.
Verify the CN354 and
CN356, C391.
Pass
Verify the BT/GPS power
supply.
(32BT) C34[Hot Side]: 3.2V
Pass
Verify the BT/GPS power
supply.
(18BT) R9:
Pass
Verify the current monitor
circuit parts.
Check the L354, C377,
R364, R362, R363, C376,
R365 and C378.
Pass
Check the PCB side B.
Check the PCB side B.
Verify the GPS RF circuit
parts.
Check the R369, R356,
R355, R354, L359, C395,
C369 and L353.
Pass
Verify the BT/GPS control
signal (/BT_SHUTDOWN).
R353: 1.8V
Pass
1-152 (No.RA053<Rev.001>)
Fail
Replace abnormal parts.
[The BT/GPS power supply
line 32BT circuit is faulty]
Fail
Verify the PCB side A parts.
Replace any abnormal parts.
[The BT/GPS power supply
Fail
line 18BT circuit is faulty]
Verify the PCB side A parts,
C15.
[Current monitor circuit is
faulty.]
Fail
Replace any abnormal parts.
[GPS RF circuit is faulty.]
Fail
Replace any abnormal parts.
[MPU/DSP (IC401) or IC351
is faulty]
Fail
Replace the PCB.
Still fail
Still fail
Still fail
Check the PCB
side B (a).
Check the PCB
side B (b).
Check the PCB
side B.