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- Pb free solder will tend to splash when heated too high (about
1100°F/600°C).
When soldering or unsoldering, please completely remove all of the solder on the pins or solder
area, and be sure to heat the soldering points with the Pb free solder until it melts enough.
2. GENERAL DESCRIPTIONS
2.1. SERVICE CAUTION-1
When the Microprocessor IC6001 and/or Back-up battery B7751 are replaced, read the following
procedure carefully and proceed it.
[REASONS]
There is a RAM in the IC6001, which is backing up:
1. Programme Navigation Data [See NOTE1]
2. TV Tuning Data
3. PG Shifter Adjustment Data
4. Option Setting Data
When IC6001 are replaced, all above listed data become not available.
These data is backed up by using the power source of:
*AC Connected: AC Power source
*AC Disconnected: Back-up Battery (B7751) & Back-up Capacitor (C7752)
[NOTE1]
As for your reference, without inserting a tape into a VCR, you can confirm that the NAVI data
that is back up with IC6001 as shown in the following steps.
1. Indicate the "NAVI" mark on the Front Information Panel. (Press
the Menu button and select the option, then set the "NAVI" to ON
mode.)
2. Turn on the Service Mode and press the "NAVI" button on the
Remote Controller in more than 5 seconds. The "NAVI" data list is
displayed on the Monitor. (Press the "MENU" button on the
Remote Controller for cancellation.)
Although stored NAVI data can be confirmed on the monitor, there is no way to transfer the
NAVI data to IC6001which is newly mounted.
2.1.1. REPLACING PROCEDURE [IC6001]
[1.PREPARATION]
Before replacing IC6001:
1. Take note that stored TV broadcast channels. (Because, its user
3
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