Philips SD-4.00SA CH Service Manual page 21

Test Instructions Mono Board DVD-SD4.00SA_CH
PM3394B
ch1
1
CH1 2.00 V~ MTB 250ns
Figure 5-32 SL
Check DC vtg on the following testpoint when Sledge at Inward
/ Outward position
Table 5-28 DC vtg check
Name Testpoint
SL - F327
SL + F326
Measure peak to peak signal on SL- and SL+ while moving
sledge outwards.
Signal will only appear momentary during command
BeSledgeOut
Table 5-29
Name Testpoint Waveform
SL - F327 Refer to Figure 5-33
SL + F326 Refer to Figure 5-33
Measure input sledge control (sledge in HOME position)
Table 5-30 Input sledge control
Name Testpoint
SINPHI F347
COSPHI F346
ch1+
CL 16532163_054
290102
Value
4.5V 0.5V
4.5V 0.5V
Value
1.5V 0.5V
1.5V 0.5V
SD-4.00SA_CH
PM3380B
m1.1
CH1 2.00 V~ MTB 500ms
Figure 5-33 SL+ / SL- ( SLEDGE OUTWARDS )
5.6.5 Tray:
To open and close the tray use the following commands:
Table 5-31 Tray
Ref. # Command Name
43a BeTrayIn
43b BeTrayOut
Measure voltage at the driver outputs of the BA5938FM for the
tray closed.
Table 5-32 Tray closes
Name Testpoint
TRAY - F340
TRAY + F338
Measure voltage and waveform at driver outputs while the tray
is opening.
5. EN 21
ch1+
CL 06532147_010.eps
161100
Remark
Tray in
Tray out
Value (Tray closed)
4.3V 2.0V
4.3V 2.0V