Philips SD-5.31SL, Service Manual

Page: 17 / 64

Test Instructions Mono Board SD5.31SL
EN 17 SD-5.31SL 5.
Table 5-15 Disc motor switching
Figure 5-24 SMotor (Random during jump track)
Figure 5-25 SFGIN
Figure 5-26 DA1-DA2-DA3
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
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.
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)
CH1 1.00 V= MTB2.00 s- 3.94dv ch1+
6
ch1
PM3380B
CL 36532043_048.eps
030603
CH1 2.00 V= MTB1.00ms ch1+
1
ch1
PM3380B
CL 36532043_049.eps
050603
Ref. # Command Name Remark
40a BeRadialOn Radial control on
40b BeRadialOff Radial control off
S TOP
1
T
ch1
CH1 2.00V= MTB 5.00mus ch1+
PM3380B
CL 36532043_058.eps
030603
1
ch1
CH1 500mV= MTB 5.00ms ch1+
PM3380B
CL 36532043_064.eps
030603