Zenith XBV613 Service Manual - Page 97

PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION 1. Checking Points prior to Repair Following abnormal phenomena may be repaired by removal of foreign materials and oil supply. Check oiling is required at the checking set or cleaning status is complete. Determine that necessity of checking and repair the set exists after checking the using period of the set together with the user. In this case, followings must be checked: Phenomena Color beat Checking Points and Cause Replacement Pollution of Full-Erase Head o F/E Head S/N, Color Faded Pollution of Video Head o Video Head Horizontal, Vertical Jitte Pollution of Video Head or Tape Transport System o Poor Sound, Low Sound Pollution of Audio/Control Head o A/C Head No tape wound or tape wound loosely. FF or REW impossible, or slow turning Pollution of Pinch Roller or Belt Capstan Belt Pinch Roller o Belt Capston Tape loosely wound in REV or Unloading Deterioration of Clutch Assembly D37 Torque Pollution of Drum and Traveling Device o Clutch Assembly A37 Fig. C-9-3 CAUTIONS If operation of the position with (O) mark is abnormal even after removing cause, replace it with substitute product since it shows damage or wearing. Fig. C-9-1 TOP VIEW Fig. C-9-2 BOTTOM VIEW * No. (1) ~ (12) shows sequence that the tape moves from the supply reel to the take-up reel.) (3) F/E Head (6) Base Assembly P3 (7) A/C Head (5) Drum Assembly (Video Head) (4) Base Assembly P2 (8) P4 Post (10) Pinch Roller (11) Take-up Guide Post (2) Tension Post (1) Supply Reel (9) Capstan Shaft (12) Take-up Reel 4-19 Fig. C-9-3 Tape Transport System