Panasonic DMR-E80HP - Timer Microprocessor (IC7501) Replacement; Standard Inspection Specifications after Making Repairs; Standard Inspection Specification

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 IC7501-1 (RESET) and the GND in
order to transmit the “RESET (L)” to the reset terminal of Timer
Microprocessor (IC7501-18), 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.
No. Procedure Item to Check
1 Turn on the power. The Panasonic RAM disc should be
recognized.
2 Enter the EE (TU IN / AV IN - AV OUT) mode. No abnormality should be seen in the
picture,
sound or operation.
3 Perform auto recording and playback for one
minute using the RAM disc.
No abnormality should be seen in the
picture,
sound or operation.
4 Model with the HDD : Perform auto recording and
playback for one minute using the HDD
No abnormality should be seen in the
picture,
sound or operation.
5 If a problem is caused by a VCD, DVD-R, DVD-
Video, Audio-CD, or MP3, playback the test disc.
No abnormality should be seen in the
picture,
sound or operation.
6 After checking and making repairs, upgrade the
firmware to the latest version.
Make sure that [FIRM_SUCCESS]
appears
FL displays.
7 Transfer [9][9] in the service mode setting, and
initialize the service settings (return various
settings and error information to their default
values. The laser time is not included in this
initialization).
Make sure that [FACT INIT] appears in
the
display.
After checking it, turn the power off.
8 To replace the RAM drive, reset all the information
(including the laser time) in the process mode 1
setting.
*The laser time is the total time that DVDs or CDs
have been played or recorded.It is recorded on
the Digital P.C.B..
Maku sure that [TEST L1] appears in the
FL
display.
After checking it, turn the power off.
Use the following checklist to establish the judgement criteria for the picture and sound.
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