HITACHI CM821FET
Instrukcja Serwisowa

Attachment A

Page 1 of 5

Procedure to fix the Screen VR on FBT of CM823 Add Copper tape form of 2 input board Add a Grounding Spring for EMI solution .
Operation (1) Chassis adjustment should be completed and prepare bond glue (2) Attach the head of glue to bond softly on the right side of Screen VR knob (3) Attach the head of glue to bond softly on the left side of Screen VR knob (4) Attach the head of glue to bond softly on the top of Screen VR knob (Refer to photo 1 ) (5) Check Screen VR can not be turned and the G2 voltage is within 600+/-10V. (6) If display has vertical ring bar( right side ) or dark line , that maybe 2 input board copper tape loss (Refer to photo 2 and 3 ) (7) Regarding to the EMI solution , has to add grounding spring on neck of CRT ( Refer to photo 4 , photo 5 ) . Photo 1

- 26-