Sanyo VHR-770 Service Manual

Also see for VHR-770: Instruction manual

SELF-DIAGNOSIS DISPLAYMechanism Mode Display/ Head Output Drop Warning Display/Cylinder Rotation AccumulatedTime DisplayThis unit displays the diagnosis contents of abnormalities and the mechanism, mode on its display panel in 2-digit numbers.When the head playback output has dropped, the “L” sign will be blinked. Some models (listed later) will also display the cylinderrotation accumulated time.These display shows the outline of the problems. Use it as a reference when servicing the unit.1. Self-Diagnosis Contentes and Mechanism Mode Display.lllWhen the STOP button on the remote control is pressed for about 10 seconds continuously, the self-diagnosis number will bedisplayed on the reception channel display of the display panel and number indicating the failed mechanism mode (changed modewhen being shifted) on the tape counter “seconds” display for 10 seconds each.During self-diagnosis display, displays other than the diagnosis numberlmechanism mode number and the cylinder accumulatedrotation time display described later (some models only) will be turned off and when displays end, the normal display will bereturned automatically.Refer to “Self-Diagnosis Contents” for the self-diagnosis numbers and the “Mechanism Mode Display Contents” for themechanism mode numbers.When the “O” button on the remote control unit is pressed during display, and clearing the self-diagnosis display and mechanismmode display.Display panelI 1-Self-Diagnosis number Mechanism mode number(Reception channel display) (Tape counter “Seconds” display)Self-Diagnosis ContentsNo. Problem Main Possible Cause Mechanism Operations andState After Occurrence00 There is no abnormality in the mechanism.The cylinder motor does not rotate. l The cylinder motor is faulty. Shifts to the STOP mode.01 l The control of the cylinder motor isfaulty.l The tape winds around the cylinder.The take-up reel does not rotate. l The take-up reel is caught. Shifts to the STOP mode.02 l The reel belt is faulty.l The take-up torque has decreased.The capstan motor does not rotate. l The capstan motor is faulty. Shifts to the STOP mode.03 l The control of the capstan motor isfaulty.The tape cannot be loaded with the l Error in the operations of the tape Unloads, shifts to the INITIAL mocassette inserted. loading mechanism. and the power goes off.(But unloading can be performed.) l Foreign particles in the tape load-04 ing mechanism.l The tape end sensor is faulty.l The reel brake of the tape cassettehas not been released.Tape loading and unloading cannot l The tape guide is caught. The power is forcibly turned off v05 be performed with the cassette in- l The loading motor is faulty. the mechanism at its current positiserted. l The control of the loading motor isfaulty.I)de,Mithion.–2-