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Electronic appliance repair tips database - TV (LCD,TFT,Plasma,Digital), Monitor, VCR, DVD recorder and player, Digital camera, Audio equipment, Microwave ovens, Phone systems, Computer repair
Make
Model
Problem
Solution
Date
Found: 11
JVC
C21M3EK
Bottom cramp, no col, pulling, warbling sound
Low 12v supply (9v) on D405 - R421 0R68 hi res
14-09-04
JVC
C21M3EK
Dead
C910 0.1µ
14-09-04
JVC
C21M3EK
Line freq off & lack of field bottom scan
R421 0R68 risen to 5R
14-09-04
JVC
C21M3EK
No R/C operation
X601 xtal wrong freq fitted - should be 4Mhz not 17Mhz
14-09-04
JVC
C21M3EK
No sigs or R/C
ZD603 5v6 zener faulty causing 5v to micro low at 4.4v
14-09-04
JVC
C21M3EK
No start up - maybe int.
C901 ( 0.1uf ) in startup cct
14-09-04
JVC
C21M3EK
No vision
CMOS switch IC202 4066B - comp video disappeared through it
14-09-04
JVC
C21M3EK
Power supply not starting up , may be intermittant.
Replace C910 0.1uF
14-09-04
JVC
C21M3EK
St/by only
HT present 110v. Replaced C909, C911 47µ 50v 105deg, ZD401 12v zener s/c, R419 1R0 2w o/c
14-09-04
JVC
C21M3EK
Onwa
Field collapse, no sound after replacing C909/911 R419 & 12v Zener
R421 0R68 ?w fusible o/c; D406 s/c - used BY228
14-09-04
JVC
C21M3EK
Onwa
No sound
IC601 micro has no PWM o/p on vol cont pin - chip faulty
14-09-04
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