Pioneer FH-P404 UC Service Manual page 34

FH-P404
QQ
3 7 63 1515 0
- Waveforms
1 RFO
0.5V/div. 0.5µs/div.
Normal mode: play
→
REFO
3 CH1: FIN
0.5V/div.
4 CH2: FO+
2V/div.
Test mode: No disc, Focus close
→
REFO
→
REFO
TE
L 13942296513
8 CH1: TEY
0.5V/div.
9 CH2: TIN
0.5V/div.
Test mode: 32 tracks jump (FWD)
→
REFO
→
REFO
6 CH1: FEY
0.1V/div.
3 CH2: FIN
0.2V/div.
Normal mode: Play
→
REFO
www
→
REFO
.
34
http://www.xiaoyu163.com
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: FIN
0.2s/div.
5 CH2: FOK
Normal mode: Focus close
→
REFO
→
REFO
→
GND
8 CH1: TEY
0.5ms/div.
9 CH2: TIN
Test mode: Single jump (FWD)
→
REFO
→
REFO
3 CH1: FIN
20ms/div.
0 CH2: SIN
Normal mode: Focus close (12cm)
→
REFO
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→
REFO
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2 9
8
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
Q Q
3 6 7 1 3 1 5
GND
8 CH1: TEY
0.5V/div.
0.5ms/div.
9 CH2: TIN
0.5V/div.
Test mode: 100 tracks jump (FWD)
→
REFO
→
REFO
3 CH1: FIN
0.5V/div.
0.5s/div.
0 CH2: SIN
1V/div.
Normal mode: Focus close (8cm)
REFO
co
REFO
.
9 4 2 8
1V/div.
0.5ms/div.
5V/div.
passes 800µm
0.5V/div.
1ms/div.
2V/div.
→
0 5 8 2 9 9 4
→
0.5V/div.
5ms/div.
0.5V/div.
0.5V/div.
0.5s/div.
1V/div.
→
m
→
9 9
2 8 9 9