Pioneer MEH-P5000R II Service Manual page 88

MEH-P5000R—,P5000,P5050
6.2 MD MECHANISM MODULE ADJUSTMENT
MD Mechanism Module
GGD1141
- About test disc
Use a low reflection disc (MMD-211) for preliminary auto tuning (AUTO1).
Use a high reflection disc (MMD-110), low reflection disc (MMD-211) for ATT auto tuning (AUTO2).
Disc No. : TEAC MMD-211B or MMD-212B
Tool No. : GGF1328
1. Be sure to perform "preliminary auto tuning" when you exchanged a PCB, Mechanism Unit, or Pickup Unit.
2. Let TP421 and TP435 (IC402: pin6, pin8) short circuited before preliminary auto tuning or overwriting EE-PROM
(IC402) to clear protection on EE-PROM.
* To overwrite EE-PROM, please see page 9 of the CX-893 Service Manual.
- How to tune optical pick up grating
Adjust Lissajous' figure (x-y) of EOUT (TP131) to FOUT (TP130) after automatically adjusting in a test mode AUTO2
using a high reflection disc.
1. Loosen the three screws of the spinning motor and adjust checking Lissajous' figure.
2. After the tuning is completed, tighten the screws 1 , 2 , and 3 , in that order.
3. Check Lissajous' figure again.
Oscilloscope
IC101
26pin
EOUT
IC101
25pin
POUT
88
Main PCB
GGF1346
Lissajous' figure
Within the range a:b = 3:1
GGD1180
Tuner Amp Unit
CN201
Check Lissajous' figure while
shifting positions to which the
spinning motor is mounted.