JVC CA-MXGB5, Service Manual

Page: 40 / 85

1-40 (No.MB160)
5.4 CD : COMMON
MB ±Check Power LINE of CD board
+5V :
No
POWER ON and CD FUNCTION
Yes
Check CD POWER.
MB =8V, +5V
Yes
Check OPEN/CLOSE.
CLOSE : SW1=SW2=5V, OPEN : SW1=SW2=0V
Yes
Does Roulette revolve?
Yes
Is Roulette control OK?
Yes
Does SLED move to Inner?
Yes
Is focus search done properly?
Yes
Does laser ON during focus search?
Yes
Does disc rotate?
Yes
State of rotation is properly.
Yes
Signal of RFO is properly.
(#2,#3,#4,#5 of IC101)
Yes
Does it read disc?
Yes
END
Check OP/CL MOTOR & IC302, WIC801
No
Check IC303 & Roulette MOTOR
WIC402 : #6=5V
No
Check Roulette control sensor
CW103 #5 (RL,SENSE) :
No
-Check oscillation of xt201=16.93MHz
-Check pin #19 of KB9226 (WDCK)=88.2kHz
-Check the signal of CW105 (MCK,MDATA,MLT)
-Check the limit switch (#5,#6 of CW102)
-Check #26 of IC101 (SLO)
-Check #11,#12 of IC301
No
-Check #7 of IC101 (FRSH)
-Check #31 of IC101 (FEO)
-Check #26,#27 IC301
No
-Check #37 of IC101 (LD)
-Check TR Q101
-Check Laser diode of pick-up
No
-Check #95,#97,#98 of WIC201
-Check #24 of IC101 (SPO)
-Check #17,#18 of IC301
-Check Spindle Motor of CD DECK
No
Check parts R111,R106,R107
No
Check parts R101,C103,C104
No
-Check CW105 #8,#9,#10,#13,#15
-Check #11,#34,#28,#29 of IC101
-Check #1,#2 of IC301
No