Sanyo DVD-5100 Service Manual page 12

CHECK FLOW AND TROUBLE SHOOTING
(Disk identification/mode setting) An extract from "GENERAL FLOW"
6
&
"LASER" lights.
Pickup returns.
8/1 2 cm identification
I Measures FE level (a) I
1
~'
Lowers lens with each IC
in DVD mode
H~
Rotates at a speed of two times that of CD
Laser on.
Focus search
I
J
I
Automatic alignment
Tracking balance
Focus balance
Focus gain
Tracking gain
RF gain
Measures FE level (b)
I
Two-layer DVD
1
YES
one-layer DVD
J
1
Sets one-layer DVD circuit to
Sets CD circuit to Sets two-layer DVD circuit to
pickup mode.
pickup mode. pickup mode
Disk identification/mode setting
IProblem/symptom ]Check
IWaveform ]Schematic diagram preference data
lCheck that disk identification is correct.
2 F
Not focusable
Check that FOO waveform is normal or smooth,
1 (disk error) Error 21 Check that peak value of detection pulse (S
curve) is correct,
(34) - (38)
Check that lens up/down operation is normal.
Check that lens is free from dirt or stain.
2 Not focusable
Check LASER current (R51OO).
F
(disk error) Error 21 Compare it with that indicated close to pickup's serial number,
3 No focus search FLGC TP716 (IC900 80pin)
F
4 No focus search
Check RFO (IC501 pin 28),
(2) - (4) F
Wrong ROM
5 inactive Check LCSW
Voltage tables
Repair CD~DVD (DVD~CD).
(7) & (8)
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