PIONEER PD-117/WPWXJ
Instrukcja Serwisowa

PD-117

11. Focus Best Adjustment
Adjust this point only if adjustment was made in item 10.

Test mode SPDL servo = CLOSE FOCUS servo = CLOSE TRKG servo = CLOSE
TEST DISC

MAX

Innermost circumference PLAY (1 TRK)

VR156
MOTHER BOARD ASSY Adjust the RF level to maximum, with the focus error voltage within ±150mV.

Oscilloscope

GND

START

GND

TP1 (CN201)
FE RF VC

Player

DC Mode CH1: 5mV/div CH2: 20mV/div H: 200ns/div Prove (10:1)

6 1 4

MOTHER BOARD ASSY

12. Tracking Servo Loop Gain Adjustment
UNDER Test mode SPDL servo = CLOSE FOCUS servo = CLOSE TRKG servo = CLOSE
TEST DISC

GND GND
Prove (10:1)

UPPER

Innermost circumference PLAY (1 TRK)

JUST

VR151
MOTHER BOARD ASSY Lissajous Waveform

Oscilloscope
X-Y Mode X: 20mV/div Y: 10mV/div

START
TP1 (CN201)
TE TI VC

Player

Prove (10:1)

Low-frequency oscillator
1.2kHz 1Vp-p

Prove (10:1)

2 3 4

100k� GND

MOTHER BOARD ASSY

24