Kenwood NX-5800 Service Manual page 68

Check the Module (BT/GPS) unit PCB side A.
Verify the BT/GPS power supply.
(33BT) L4: 3.3V
When a normal
condition is confirmed.
Verify the BT/GPS power supply.
(18BT) L5:1.8V
When a normal
condition is confirmed.
Verify the RTC for the BT/GPS.
X2 (3 pin): square waveform,
32.768kHz, 1.8Vp-p
When a normal
condition is confirmed.
Verify the reference clock for
the BT/GPS.
(BT_CLK) Intersection of C8
and C9: Clipped Sine waveform,
19.2MHz, 0.2 to 1.2 Vp-p
When a normal
condition is confirmed.
Check the Module (BT/GPS) unit PCB side B.
1-68 (No.RA017<Rev.002>)
[The BT/GPS power supply
When an abnormal
line 33BT circuit faulty]
condition is confirmed.
Visual check of the PCB side A parts.
(Whether not damaged)
L4, C15, C19, C20, C33
Replace any abnormal parts.
[The BT/GPS power supply.
When an abnormal
line 18BT circuit isfaulty]
condition is confirmed.
Visual check of the PCB side A parts.
(Whether not damaged)
C18, C13, C31, L8, C39
Replace any abnormal parts.
When an abnormal
Verify the RTC line circuit for
condition is confirmed.
the BT/GPS.
Visual check of X2, L8, C39
(Whether not damaged)
Replace any abnomal parts.
[The reference clock circuit
When an abnormal
for the BT/GPS is faulty]
condition is confirmed.
Visual check of the R9,Q1 R10,R26
R12, R13, X1, C4, C8, C9
(Whether not damaged)
Replace any abnormal parts.
When an abnormal
Check the Module (BT/GPS) unit
condition is confirmed.
PCB side B.
When an abnormal
condition is confirmed.
Check the Module (BT/GPS) unit
PCB side B.