Philips SD-5.31SL Service Manual page 18

EN 18 5. SD-5.31SL
Table 5-17 Trackingl
Signal
Name Testpoint
Track - F003
Track + F004
PM3380B
ch1
ch2
T
1
2
CH1 2.00V=
CH1 2.00V=
Figure 5-28 TRACK ON Command
5.6.4 Sledge check
The Sledge control circuit is checked using the following
commands to move the sledge:
Table 5-18 Sledge check commands
Ref. # Command Name
41a BeSledgeIn
41b BeSledgeOut
Visual check on the sledge,when Sledge control ON, if the
sledge movement is visible.
Once the check is completed,switch the Sledge control OFF
before executing next command
To check the waveform of SLEDGE- and SLEDGE+,
connect a 10W / 0.25W resistor between SLEDGE- and
SLEDGE+ to serve as dummy load without connecting the
loader.
PM3380B
ch1
ch2
T
1
CH1 2.00V=
CH2 2.00V=
Figure 5-29 SLED Inwards comand
Test Instructions Mono Board SD5.31SL
Description
Negative drive to tracking coil
Positive drive to tracking coil
MTB 1.00s 4.18dv ch1+
CL 36532043_080.eps
Remark
Sledge inwards
Sledge outwards
MTB 500ms 5.82dv ch1+
CL 36532043_077.eps
ch1
ch2
Figure 5-30 SLED Outwards command
5.6.5 Tray Check:
The tray control circuit is checked using the following
command:
030603
Table 5-19 Tray command
Ref. # Command Name
43a
43b
Measure the DC voltages and waveforms when executing
the tray closed command.
Table 5-20 Tray in
Signal Name
LOAD +
LOAD -
INSW
OUTSW
ch1
ch2
Measure the DC voltages and waveforms when executing the
030603
tray opening command.
PM3380B
T
1
CH1 2.00V=
CH2 2.00V= MTB 500ms
Remark
BeTrayIn Tray in
BeTrayOut Tray out
Testpoint Value (Tray closed)
F116 2V5 +/- 0V2
F117 2V5 +/- 0V2
F119 0V +/- 0V2
F121 3V +/- 0V2
PM3380B
T
1
2
CH1 2.00V=
CH1 2.00V= MTB 500ms 2.24dv ch1+
Figure 5-31 Tray in command
5.82dv ch1+
CL 36532043_078.eps
030603
CL 36532043_081.eps
030603