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Philips SD-5.31SL Service Manual Page 17

Dvd-video player, dvd module sd-5.31sl.
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Table 5-15 Disc motor switching
Signal
Name
Testpoint
Frequency
SMOTOR Pin22/IC7101 Output voltage control
SSPDON Pin23/IC7101 Power save
Motor ON - high
Motor OFF - low
VH
Pin15/IC7101 HALL Bias
Motor ON - LOW
Motor OFF - HIGH
SFGIN
Pin 24/IC7101 Tacho signal output
DA1
F113
Output
DA2
F114
Output
DA3
F115
Output
H1+
F112
H1+ HALL input (positive signal)
H1-
F111
H1- HALL input (negative signal)
H2+
F110
H2+ HALL input (negative signal)
H2-
F109
H2- HALL input (negative signal)
H3+
F108
H3+ HALL input (negative signal)
H3-
F107
H3- HALL input (negative signal)
PM3380B
ch1
6
CH1 1.00 V=
MTB2.00 s- 3.94dv ch1+
Figure 5-24 SMotor (Random during jump track)
PM3380B
ch1
1
H1 2.00 V=
MTB1.00ms
Figure 5-25 SFGIN
Test Instructions Mono Board SD5.31SL
CL 36532043_048.eps
030603
ch1+
CL 36532043_049.eps
050603
SD-5.31SL
PM3380B
ch1
T
1
CH1 2.00V=
Figure 5-26 DA1-DA2-DA3
PM3380B
ch1
1
CH1 500mV=
MTB 5.00ms
Figure 5-27 HALL input signal
When measurement is completed, switch the discmotor OFF
before executing next command
5.6.3
Tracking check
The tracking control circuit is checked using the following
commands:
Table 5-16 Tracking
Ref. # Command Name
40a
BeRadialOn
40b
BeRadialOff
Visual check on the radial ,when Radial control ON, if the
radial movement is visible.
Once the check is completed,switch the Radial control OFF
before executing next command
To check the waveform of TRACK- and TRACK+,
connect a 10W / 0.25W resistor between TRACK- and
TRACK+ to serve as dummy load without connecting the
loader.
5.
EN 17
S T OP
MTB 5.00mus
ch1+
CL 36532043_058.eps
ch1+
CL 36532043_064.eps
030603
Remark
Radial control on
Radial control off
030603

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