Cd Player Adjustments - Sanyo DC-F430AV Service Manual

CD PLAYER ADJUSTMENTS
5. ADJUSTMENTS
Adjustment Measuring Service output
Adjustment Adjustment value
Item
instrument
mode
connection
location
(a) Tracking Oscilloscope yes TP3 : TE
VR101 Waveform symmetry
balance TR4 : VC
A=B
(b) Checking Check be sure that the "eye"
the "eye"
Oscilloscope
.
TP1 : RF pattern is at the center of the
pattern TP4 : VC waveform and that the diamond
shape is clearly defined
(1) Tracking balance adjustment
1. Connect an Oscilloscope to TP3 (TE) and TP4 (VC).
2. Turn "POWER" switch on.
3.
Set the test disc. (DISC 1)
4. Press "SOUND PRESET" key and "TUNING MODE key
simultaneously, whthin 1 second after pressing the
"MEMORY" switch.
(SERVICE MODE: Tracking balance adjustment mode)
5. Confirm that the oscilloscope waveform is symmetrical on
the top and bottom in relation to OV (VC).
6. If it cannot be adjusted by fully rotating VR1 01, cut the
resistor R1 108 (1OkQ ) with a pair of pliers, and adjust
again.
7. To cancel service mode, disconnect the power cord's plug
from the electrical outlet.
Q
I
CH1. 5CQTV CH2. wJmV:
; *Y
Cnlol Dclo 1 :
,::
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E
3
Ov(vc)
A
B
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t
::: :
I
200mV/div.
5ms/div.
(2) Checking the "eye" pattern
1.
Switch "ON" the
POWER.
TP1 +
(RF)O
2.
Connect an oscilloscope to TP1 (RF) and TP4 (VC).
OSCILLOSCOPE
3. Load
the test disc.
TP4
4.
PLAY/PAUSE switch push ON.
(l/c)"
5. Check to be sure that the "eye" pattern is at the center of
waveform and that the diamond shape is clearly defined.
6. Press the STOP button.
7. Switch "OFF the POWER.
I
I
+-1
1
ENING EXPANDED
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