PIONEER XR-MT3V/ULXCN/NC
Instrukcja Serwisowa

XR-MT3V

(3) Can you hear the sound of CD Changer Mechanism or clamper movement when power cord plug in
B

(4) Tuner troubleshooting

C

Does pin 3 of IC1302 and pin4 of IC1301 have 6.5V supply ?

NO

Does noise come out ?

NO

E

YES

Check the corresponding 8V power supply.

YES

Is pin 6 of IC1302 (VREF) in 5.3V NO

YES

Does pin 12 (VDD) of IC102 have 5V ?

NO

Please check the corresponding resistors R1341 and R1342.

YES

Please check the pin 1 of CN11 in 8V and the corresponding power circuit on the Tuner board. DZ103, L102, R177.

Please check the waveform of pin 5(RIN) NO and pin 4 (FIN) of IC1302 according to the corresponding operation? Is it correct ? Please check the connector of CN1201 and CN1302, YES CN1303 and CD MECHA..

Is the waveform of pin 3, 4 and 5 of IC102 correct when the tuner scans the frequency ?

NO

YES Please check the waveform of pin 1 (OUT-) and NO pin 7 (OUT+) of the IC1302? Is it correct ? The IC1302 is broken. YES

Please check the connection of the pins 3, 4 and 5 of IC102 to IC401.

Does pin 6 (TUN-) of IC102 have a 0V ?

NO

YES

Please check the pins 1 and 2 of IC102 that have 7.2MHz clock signal.

The Changer is broken.

Does pin 8 (VCC) of IC101 have 8V ? YES

NO

Please check the corresponding power circuit, Q113 and R157. The connection CN11.

Please check the FE101.

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