3-24
ONE POINT REPAIR GUIDE
10. VFD IS NOT DISPLAYED WHEN POWER ON THE SET
When power on the set, any icons or characters on VFD are not displayed.
10-1. VFD (VFD301)
10-1-1. Solution
Please check and replace VFD301 on FRONT board.
10-1-2. How to troubleshoot (Countermeasure)
1) Check if VH, F+ and F-, DVCC_3.3V are output from SMPS to VFD via the MAIN board.
2) Check if the IC501 outputs VFD_CLK, VFD_STB, and VFD_DO to the FRONT board.
3) Check if the VH, FRONT_12V, SW on the FRONT board.
If the VH from VFD(DGND, VDD) isn’t output, replace VFD with a new one.
10-1-3. Service hint (Any picture/ Remark)
< FRONT circuit >
< FRONT circuit >
VFD_STB,
VFD_STB,
VFD_CLK,
VFD_CLK,
VFD_DO
VFD_DO
Summary of Contents for CJ87
Page 17: ...1 16 ...
Page 19: ...2 2 ...
Page 21: ...2 6 2 5 ...
Page 23: ...2 8 A60 3 SPEAKER SECTION FRONT SPEAKER ...
Page 69: ...3 40 ...
Page 73: ...3 47 3 48 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD DIAGRAM TOP VIEW ...
Page 75: ...3 51 3 52 2 MAIN P C BOARD DIAGRAM TOP VIEW ...
Page 76: ...3 53 3 54 MAIN P C BOARD DIAGRAM BOTTOM VIEW ...
Page 77: ...3 55 3 56 3 FRONT P C BOARD DIAGRAM TOP VIEW ...
Page 78: ...3 57 3 58 FRONT P C BOARD DIAGRAM BOTTOM VIEW ...
Page 79: ...3 59 3 60 4 JACK P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW ...