JVC MX-GB6 Service Manual page 40

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