Philips SD-5.31SL Service Manual page 19

Table 5-21 Tray out
Signal Name Testpoint
LOAD + F116
LOAD - F117
INSW F119
OUTSW F121
PM3380B
ch1
T
ch2
1
2
CH1 2.00V=
CH1 2.00V=
Figure 5-32 Tray out command
5.6.6 Focus check
Test need a DVD disc in the DVD player to operate properly.
The focus control circuit is checked using the following
commands:
Table 5-22 Focus check commands
Ref. # Command Name
38a BeFocusOn
38b BefocusOff
Visual check on the laser,when Focus control ON, if the
laserlight is visible.
Once the check is completed,switch the focus control OFF
before executing next command.
To check the waveform of FOCUS- and FOCUS+,
connect a 10W / 0.25W resistor between FOCUS- and
FOCUS+ to serve as dummy load without connecting the
loader.
Test Instructions Mono Board SD5.31SL
Value (Tray closed)
2V8 ± 0V2
2V2 ± 0V2
3V ± 0V2
0V ± 0V2
MTB 500ms 2.24dv ch1+
CL 36532043_082.eps
Remark
Focus on
Focus off
Table 5-23 Focus motor switching
Signal Name
FOCUS -
FOCUS +
PM3380B
ch2
ch1
030603
5.6.7 Hf Path
Play DVD Test Disc.
Measure outputs of diodes A, B, C, D, E, F.
Table 5-24
Signal Name
A
B
C
D
E
F
At outputs of diodes A, B, C, D the following waveform can be
measured: Refer to Figure Output of diodes A, B, C, D
PM3380B
ch1
Figure 5-34 Output of diodes A,B,C,D
Check the HF output, RFO, at testland F219 and observe the
waveform, refer to Figure RFO.
SD-5.31SL
Testpoint Description
F005 Negative drive to focus coil
F006 Positive drive to focus coil
2
T
1
CH1 1.00V=
CH2 1.00V= MTB 500ms 4.08dv ch1+
Figure 5-33 Focus ON Command
Testpoint
F016
F015
F014
F017
F019
F018
T
1
CH1 50.0mV= MTB 20.0us
5. EN 19
CL 36532043_061.eps
030603
Value
2.5V +/-0.2%
2.5V +/-0.2%
2.5V +/-0.2%
2.5V +/-0.2%
2.5V +/-0.2%
2.5V +/-0.2%
ch1+
CL 36532043_066.eps
030603