Panasonic RR-US550PP / RR-US550E Service Manual ▷ View online
37
9 Service Position
Note: For description of the disassembly procedures, see the Section 8.
9.1.
Checking and Repairing of Main P.C.B. and LCD P.C.B.
Step 1 : Remove the MIC Ornament
Step 2 : Remove the Rear Cabinet Assembly
Step 3 : Remove the Side Ornament
Step 2 : Remove the Rear Cabinet Assembly
Step 3 : Remove the Side Ornament
Step 4 : Detach Speaker Unit Wire at connector P301 on Main P.C.B.
Step 5 : Slide out the Main P.C.B. and LCD P.C.B. slightly to release the USB Port from the Front Cabinet Assembly.
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Step 6 : Remove the Main P.C.B. and LCD P.C.B.
Caution : Ensure the Battery Terminal + is release from the groove when removing the Main P.C.B.
Caution : Ensure the Battery Terminal + is release from the groove when removing the Main P.C.B.
Step 7 : Connect the Speaker Unit Wire to connector P301 on Main P.C.B.
Step 8 : Connect the DC Power supply device to the battery terminal for the power supply.
Step 9 : Checking and reparing LCD P.C.B. and Main P.C.B.
Step 8 : Connect the DC Power supply device to the battery terminal for the power supply.
Step 9 : Checking and reparing LCD P.C.B. and Main P.C.B.
Note : Refer to Troubleshooting Guide of item 7 for composition check.
39
10 Voltage Measurement & Waveform Chart
Note:
• Indicated voltage values are the standard values for the unit measured by the DC electronic circuit tester (high-impedance) with
the chassis taken as standard.
Therefore, there may exist some errors in the voltage values, depending on the internal impedance of the DC circuit tester.
Therefore, there may exist some errors in the voltage values, depending on the internal impedance of the DC circuit tester.
• Circuit voltage and waveform described herein shall be regarded as reference information when probing defect point because it
may differ from actual measuring value due to difference of Measuring instrument and its measuring condition and product itself.
10.1. MAIN P.C.B. (1/3)
REF NO.
MODE
1
2
3
4
PLAY
0
0
2.8
1.2
STANDBY
0
0
2.8
1.2
REC
0
0
2.8
1.2
REF NO.
MODE
1
2
3
4
PLAY
0
0
2.8
2.8
STANDBY
0
0
2.8
2.8
REC
0
0
2.8
2.8
REF NO.
MODE
18
20
PLAY
2.8
1.4
STANDBY
2.8
1.4
REC
2.8
1.4
REF NO.
MODE
4
5
PLAY
2.7
2.7
STANDBY
2.7
2.7
REC
2.8
2.8
REF NO.
MODE
1
2
3
4
5
PLAY
0
0
0
0
0
STANDBY
0
0
0
0
0
REC
1.2
0
1.3
1.3
2.5
REF NO.
MODE
1
2
3
4
5
PLAY
0
0
0
0
0
STANDBY
0
0
0
0
0
REC
1.3
0
1.3
1.3
2.4
REF NO.
MODE
1
2
3
4
5
6
7
8
PLAY
0
0
0
0
0
0
0
0
STANDBY
0
0
0
0
0
0
0
0
REC
1.3
1.3
1.2
0
1.2
1.3
1.3
2.4
REF NO.
MODE
1
2
3
4
PLAY
0
0
0
2.8
STANDBY
0
0
0
2.8
REC
2.5
0
1.4
2.8
IC402
IC403
RR-US550PP/E MAIN P.C.B.
IC102
IC103
IC302
IC401
IC301
IC405
40
10.2. MAIN P.C.B. (2/3)
REF NO.
MODE
1
2
3
4
PLAY
0
0
0
0
STANDBY
0
0
0
0
REC
0
0
0
0
REF NO.
MODE
1
2
3
4
PLAY
0
0
0
0
STANDBY
0
0
0
0
REC
0
0
0
0
REF NO.
MODE
1
2
3
4
5
6
PLAY
2.9
0
3
2.9
1.2
2.8
STANDBY
2.9
0
2.9
2.9
1.2
2.8
REC
3
0
3
2.9
1.3
3.2
REF NO.
MODE
1
2
3
4
PLAY
1.2
0
2.5
2.6
STANDBY
1.2
0
2.5
2.6
REC
1.2
0
2.5
2.6
REF NO.
MODE
1
2
3
4
PLAY
1.2
0
0
2.6
STANDBY
1.2
0
0
2.6
REC
1.2
0
0
2.6
REF NO.
MODE
12
37
PLAY
2.8
2.8
STANDBY
2.8
2.8
REC
2.8
2.8
RR-US550PP/E MAIN P.C.B.
IC509
IC701
IC504
IC508
IC502
IC503
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