Sanyo DC-F210 - Page 13

CD PLAYER ADJUSTMENTS
._
4. ADJUSTMENTS
Adjustment
Measuring
Item instrument
(a) Tracking
Oscilloscope
balance
(b) Checking the’’eye”
Oscilloscope
pattern
L
(1) Tracking balance adjustment
Service output Adjustment
mode connection location
yes TP3 : TE VRIO1
TR4 :
Vc
TP1 : RF
TP4 : VC
1.
2.
3.
4.
5.
6.
7.
Connect an Oscilloscope to TP3 (TE) and TP4 (VC).
Turn “POWER” switch on.
Set the test disc. (DISC 1)
Press “SOUND PRESET” key and “FM MODE” key
simultaneously .Within 1 second after pressing the
“MEMORY” switch.
(SERVICE MODE : Tracking balance adjustment mode)
Confirm that the oscilloscope waveform is symmetrical on
the top and bottom in relation to OV (VC).
If it cannot be adjusted by fully rotating VR1OI, cut the
resistor RI 108 (10kf2) with a pair of pliers, and adjust
again.
To cancel service mode, disconnect the power cord’s plug
from the electrical outlet.
Adjustment value
Waveform symmetry
A=B
Check be sure that the “eye”
pattern is at the center of the
waveform and that the diamond
shape is clearly defined.
a
I
CH1. Ywmv
CH2. 5WnlV.
, W*
DC1O 1 CC1O 1
I
t
::
t
::
,.:
A,B
TE
3
Ov(vc) A
B
I
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 switch push ON.
(Vc)”
5. Check to be sure that the “eye” pattern is at the center of
I
I
waveform and that the diamond shape is clearly defined.
6. Press the STOP button.
7. Switch “OFF” the POWER.
DED
b
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