Panasonic AG-RT850P Service Manual page 63

1. SERVICE INFORMATION DISPLAY
1-1. Purpose of Service Information Display
This is information to aid trouble shooting by indicating the source of the malfunction.
1-2. How to display Service Information
Press the FF and EJECT buttons simultaneously.
In the service Information display, there are five digit numbers divided into 3 functions.
The first digit indicates service mode that the unit is currently in.
MODE 1: Check tape protection circuit.
MODE 2: Check tape transport mechanism.
MODE 3: Indicate the most recent fault indication code.
MODE 4: Indicate the second recent fault indication code.
MODE 5: Indicate the third recent fault indication code.
MODE 6: Check cylinder motor and capstan motor.
MODE 7: Check loading/unloading mechanism action.
The second, third, forth and fifth digits are service data 1 and 2 which indicate the condition of the circuit or
mechanism.
1-3. Use of Service Modes
(1) Show Service Information Display.
(2) To change Service modes, press the FF and EJECT buttons simultaneously.
(3) Mode 0: Indicate VCR mode and process number
(4) Mode 1:
Service Data 1: Checks the sensor LED, Supply & Take-up sensor circuits by blocking the light from the sensor
LED to either or both Supply & Take-up sensor.
When the light is blocked to both sensors, "00" should be indicated on the service data number.
When the light is blocked to the supply sensor, "01" should be indicated.
Service Data 2: Indicate the code if the microprocessor receives the operating commands from the mode buttons
and/or remote controller.
(5) Mode 2:
Service Data 1: Check the mode switch circuit while indicating mechanism position.
Service Data numbers indicate the position of the mode switch as the mechanism position.
Service Data 2: Indicate control command to cylinder unit, capstan unit and loading motor unit.
(6) Mode 3:
Service Data 1: The most recent fault indication code is displayed.
Service Data 2: Indicate complementary data (VCR mode, mechanism position and so on) for the most recent
fault indication code.
INF-1