Pioneer FX-MG8247ZT/ES Service Manual page 48

1
- Waveforms
A
1 RFO
0.5V/div. 0.2µs/div.
Normal mode: play
REFOUT→
B
1 CH1: RFO
1V/div.
2 CH2: MIRR
5V/div.
Test mode: Tracking open
C
→
GND
6 CH1: FEY
0.5V/div.
7 CH2: XSI
2V/div.
Normal mode: Focus close
D
REFOUT→
REFOUT→
GND →
6 CH1: FEY
0.1V/div.
3 CH2: FIN
0.2V/div.
Normal mode: Play
E
REFOUT→
REFOUT→
F
48
1
2
Note:1. The encircled numbers denote measuring pointes in the circuit diagram.
2. Reference voltage
REFOUT:2.5V
1 RFO
Test mode
REFOUT→
3 CH1: FIN
0.5ms/div.
5 CH2: FOK
Normal mode: Focus close
REFOUT→
REFOUT→
GND →
8 CH1: TEY
1ms/div.
9 CH2: TIN
Test mode: 32 tracks jump (FWD)
REFOUT→
REFOUT→
3 CH1: FIN
20ms/div.
0 CH2: SIN
Normal mode: Focus close
REFOUT→
REFOUT→
FX-MG8247ZT/UC
2
3
1 CH1: RFO
0.5V/div. 0.5µs/div.
2 CH2: MIRR
Normal mode: The defect part
REFOUT→
REFOUT→
→
GND
0.5V/div. 3 CH1: FIN
0.2s/div.
2V/div. 4 CH2: FOP
REFOUT→
REFOUT→
8 CH1: TEY
0.5V/div.
0.5ms/div.
9 CH2: TIN
0.5V/div.
Test mode: Single jump (FWD)
REFOUT→
REFOUT→
0 SIN
0.5V/div.
0.5s/div.
1V/div.
Normal mode: Play
REFOUT→
3
4
1V/div.
0.5ms/div.
5V/div.
passes 500µs/div.
0.5V/div.
0.2s/div.
2V/div.
Test mode: No disc, Focus close
0.5V/div.
0.5ms/div.
0.5V/div.
0.5V/div. 0.1s/div.
4