Read Sharp XL-505E (serv.man5) Service Manual online
XL-505H,505E,507E/CP-505,505E,507
– 10 –
Figure 10-1
Figure 10-2
1. This CD unit need adjustment as follow.
CD SECTION
Figure 10-3
CD Test Mode
Adjustment Part
Value/Adjusting Method
Instrument Connection
Step 1
VR803 (Focus Offset)
DC + 40 mV (FEL>RFO)
FEI (R826) and VRO
(1-Pin of TP801)
(1-Pin of TP801)
Step 4
VR802 (Tracking Error Balance)
*1 (See Fig. 10-1)
TSO (3-Pin of TP801)
and VRO (1 Pin of TP801)
and VRO (1 Pin of TP801)
*1: Adjust to obtaiin vertically symmetrical waveform (Fig. 10-1) with respect toreference DC level. The reference level is VRO
(Approx DC 2.1V).
2. This CD unit have the following automatic adjustment function. Automatic adjustment item.
2-1: Focus Servo Gain (Fig. 10-2)
Focus Gain Adjustment is performed when disc is changed.
2-2: Tracking Servo Gain (Fig. 10-3)
Tracking Gain Adjustment is performed when disc is changed and disc is playbacked.
TSO
VRO
1
SYMMETRICAL
UP AND DOWN
UP AND DOWN
FET
FSO
1
2
TSO
TS2O
1
2
Figure 10-4 ADJUSTMENT POINTS
VR802
VR803
TP801
TRACKING
ERROR
BALANCE
ERROR
BALANCE
FOCUS
OFFSET
OFFSET
T
S
O
N
C
V
R
O
321
3 2 1
CD SERVO PWB
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