Power Part - Philips CDR Mozart Service Manual

GB 18 5. CDR Mozart
Servo Drivers Check (Sledge Servo)
SERVO DRIVERS CHECK
USE FREYA SERVO BOARD CIRCUIT DIAGRAM 1 AND 3 AND FREYA SERVO BOARD BOTTOM- AND TOP VIEW: TESTPOINTS
SLEDGE SERVO
PM3392A
VSL
GND
CH1:1.00 V= MTB 500ns
Trouble Shooting
Switch on player
via ComPair mode
Execute "sledge inwards"
and "sledge outwards" tests
NOK
Check power part
Check reset and clock part
OK
Check S1V65 (=1V65) at
testpoint S9
OK
Check voltages testpoints S4, S5, S7, S8
(TP95, TP94, TP112, TP96) : +/- 1.6V
OK
Check voltage testpoint S1 : if S1=0V then S3=0V
(TP 146)
Check voltage testpoint S2 : if S2=0V then S6=0V
(TP 147)
OK
Check VSL signal at testpoint S10 (TP151)
OK
Check SL+ signal at testpoint S11 (TP54) :
+3V (going to 5V4 when executing "sledge outwards")
Check SL- signal at testpoint S12 (TP55) :
+5V4 (going to 3V4 when executing "sledge outwards")
OK
SLEDGE SERVO OK
OK
SLEDGE SERVO OK
NOK
Check R3002, R3065, C2054
NOK
if S1=1V65 then 1V<S3<4V
NOK
if S1=3V3 then S3=5V
if S2=1V65 then 1V<S6<4V
if S2=3V3 then S6=5V
NOK
NOK
Check VAM5020
Check opamp 7010
Check MACE 7019
Check driver 7003
Check MACE 7019
CL 16532046_014.eps
101001