Sanyo DC-F430AV Service Manual page 13

CD PLAYER ADJUSTMENTS
4. ADJUSTMENTS
Measuring
Adjustment
instrument
Item
(a) Tracking Oscilloscope
balance
(b) Checking
Oscilloscope
the "eye"
pattern
(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 .Within
"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 VRlOl, cut the
resistor R1108 (1 Ok Q ) with a pair of pliersand
again.
7. To cancel service mode, disconnect the power cord's plug
from the electrical outlet.
(2)Checking the "eye"
1. Switch "ON" the POWER.
2. Connect an oscilloscope to TPl (RF) and TP4(VC).
3. Load the test disc.
4. "PLAY/PAUSE" switch push ON.
5. Check to be sure that the "eye" pattern is at the center
ofwaveform and that the diamond shape is clearly defined.
6. Press the "STOP" button.
7. Switch "OFF" the POWER.
Service
mode
1 second after pressing the
adjust
pattern
output Adjustment
location
connection
TP3 : TE
TR4 : VC
TP4 : VC
R F
T E
Adjustment value
Waveform symmetry
Check be sure that the "eye"
pattern is at the center of the
waveform and that the diamond
shape is clearly defined
OPENING EXPANDED