First check the power part, found traces of PCB is burning, measuring ICl002 (UNl02) feet of resistance compared with normal discrepancy is bigger. The internal circuit is composed of 6 triode and 6 stabilivolt, electricity measurement after replacement, UNl02 (3), (5) feet just 2.4 V (normal) should be 5.1 V. From the drawings to see this voltage can be made of potentiometer VRl003 Ω (5 k) regulation, as the one foot end of the potentiometer desoldering, after repair welding UNl02 (3), (5) feet can be adjusted to 5 v. But still did not hear load motor rotation when the phone is switched on. Check the load motor driven IC6004 (M54543L), under normal circumstances, (2) the power supply the feet should be 12 v. (1), pet-name ruby feet are 8 v. (4) and computer instructions the feet should be 4.5 V transient voltages, driving feet (3, 7 feet, short-term output driving voltage, so that the warehouse to the closed position. Boot instantaneous measured (1) the foot of 9.8 V. (2) feet 11.96 V is normal; (4) feet dropped from 4.6 V to 0 V, command output is normal; But (3), 7 feet only 1.2 V, the voltage is too low; Release the load of 8 v motor and test 7 feet. This may be for IC6004 carrying capacity is poor; May also be a bad load motor. With the same load motor replacement after the commissioning, still not rotating. Therefore, identified as IC6004 damage, electric motor rotation after substitution, with warehouse close to normal. But no action operating out of the box key, and in the condition of camera insert a cassette smear complete prevention, also failed to load, improper for tape in place switch SWl503 closed. Because only when the switch is closed, the CPU can send loading instruction; The machine with the tape, operate out of the box key can play a role. Then removed with warehouse, readjust with warehouse and install the appropriate switch Angle after electrify commissioning, out of the box of normal operation. 9Uyservice manual download site
 9Uyservice manual download site
At this time of commissioning the replay, viewfinder image, but brought down and walked out of the box of timing with noise, out of the box is not free. This is typically the dominant axis belt caused by aging, too loose, replace the dominant turn after the belt, the above phenomenon has been ruled out.

 2    1 2 Next Last