Panasonic SA-PT875GA, Руководство по обслуживанию

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7.1.2. Troubleshooting Guide
Symptom Checking Items Repair Items Remarks
FL display blinking with
abnormal segment when
power ON the set or "F61"
Check the soldering of the SMPS
P. C.B.
Is there any solder crack at area
(D5802, Q5841, R5842)
Check all the supply line 30V
& +18V
Is there any solderability at area
of feedback circuit
Check feedback circuit.
Tou ch-up the solder crack area/
Change the defective parts.
(Tem perature Detect)
D5807, QR5840, D5843
( 30V Detect)
Touch-up the necessary areas
IC5801, PC5720, D5725
SMPS
P. C.B.
Refer to
Fig. 1
First Power ON Display
immediate show "F61". Check Speaker output by using
multi-meter,
If there is a DC Voltage around
30V
Check D-Amp IC (Pin 10 &
14) which have DC Voltage at
Speaker output short to
Vdd/Vss
If shorted that means D-Amp IC
damage already.
Change the defective parts.
D-AMP IC:
IC5000/IC5200/IC5300/IC5400
P/N = C1BA00000487
For Configuration
Refer to:
Table 1 D-Amp IC Configuration
D-AMP
P. C.B.
Refer to
Fig. 3
Power ON for a while then
only trigger "F61".
(Symptom always happen) Check the fan connection &
feedback loop:
If the fan not proper connected,
"F61" will trigger when the
volume increase.
If the fan is not working, check
for fan circuit.
Check the soldering of the SMPS
P. C.B.
Is there any solder crack at area
(QR5840, Q5841, D5840, D5841)
Check all the supply line VDD
Re-connect the Fan to CN5501
Fan circuit: Q5640, Q5641,
Q5642, Q5644, D5640
Touch-up the solder crack area /
Change the defective parts.
QR5840,Q5841,D5840,D5841
Feedback Circuit: IC5801,
PC5720, D5725
D-AMP
P. C.B.
Refer to
Fig. 4
Power ON for a while and
then trigger "F76" Check all supply voltages as
follows:
Step 1: Check for supply voltages
from SMPS P. C.B to Main P.C.B
at pin 8 & 9 of CN2016. If there are
supply voltages, proceed to Step 2.
If no voltages detected, check wire
connection and circuitry connection
from SMPS P. C.B.
Step 2: Check if there is supply
voltages for Vp, F+ & F- at
CN2016
If there is supply voltages of
+
CN2016
5V, +9V & +18V at
If there is supply voltages of
7V at CN2017 on Main P.C.B.
Check and change the possible
defective parts.
FP2901(Fuse Protector),
T2900, D2901, D2906,
D2908, D2909
IC2903 (Switching Regulator)
& related regulator circuit
components
IC2900 (Switching Regulator)
& related regulator circuit
components
SMPS
P.C.B.
Refer to
Fig. 2
D5802, Q5841, R5842
(IC5801, PC5720, D5725)