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6.2.5. Caution when replacing the parts
1. RAM Drive
In case the unit does not operate normally after replacement of the
RAM Drive with new one.
A. While power is off, press [SKIP (R)], [TIME SLIP] and [OPEN/
CLOSE] keys simultaneously for five seconds. Then the unit
turns into "TEST Mode", and the region code is stored on the
new RAM Drive automatically.
After few seconds, turn off the power and turn on the power
again, then the unit operates normally.
Note:
In this case, all parameters are initialized.
2. Timer Microprocessor (IC7501)
In case the unit does not operate normally after replacement of the
Timer Microprocessor with new one.
A. While power is ON, short IC7505-1 pin (RESET) and the GND in
order to transmit the "RESET (L)" to the reset terminal of Timer
Microprocessor (IC7501-18 pin), then the unit operates normally.
7. Standard Inspection Specifications after Making
Repairs
7.1. Standard Inspection Specification
After making repairs, we recommend performing the following inspection, to check normal
operation.
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