Pioneer CDX-M8127ZT/WL Service Manual page 16

1
- Waveforms
A
1 RFO
0.5V/div. 0.5µs/div.
Normal mode: play
→
REFO
B
3 CH1: FD
0.5V/div.
4 CH2: FOP
2V/div.
Test mode: No disc, Focus close
→
REFO
C
→
REFO
8 CH1: TEY
0.5V/div.
9 CH2: TD
0.5V/div.
Test mode: 32 tracks jump (FWD)
D
→
REFO
→
REFO
6 CH1: FEY
0.1V/div.
3 CH2: FD
0.2V/div.
E
Normal mode: Play
→
REFO
→
REFO
F
16
1
2
Note:1. The encircled numbers denote measuring pointes in the circuit diagram.
2. Reference voltage
REFO:2.5V
1 CH1: RFO
2 CH2: MIRR
Test mode: Tracking open
→
GND
3 CH1: FD
0.2s/div.
5 CH2: FOK
Normal mode: Focus close
→
REFO
→
REFO
→
GND
8 CH1: TEY
0.5ms/div.
9 CH2: TD
Test mode: Single jump (FWD)
→
REFO
→
REFO
3 CH1: FD
20ms/div.
0 CH2: MDYA 1V/div.
Normal mode: Focus close (12cm)
→
REFO
→
REFO
CDX-M8127ZT/WL
2
3
1 CH1: RFO
1V/div.
0.5ms/div.
2 CH2: MIRR
5V/div.
Normal mode: The defect part
→
GND
6 CH1: FEY
0.5V/div.
0.2s/div.
7 CH2: XSI
2V/div.
Normal mode: Focus close
→
REFO
REFO
GND
8 CH1: TEY
0.5V/div.
0.5ms/div.
9 CH2: TD
0.5V/div.
Test mode: 100 tracks jump (FWD)
→
REFO
→
REFO
3 CH1: FD
0.5V/div.
0.5s/div.
0 CH2: MDYA 1V/div.
Normal mode: Focus close (8cm)
→
REFO
→
REFO
3
4
1V/div.
0.5ms/div.
5V/div.
passes 800µm
0.5V/div.
1ms/div.
2V/div.
→
→
0.5V/div.
5ms/div.
0.5V/div.
0.5V/div.
0.5s/div.
4