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Adjustment procedures, Disassembly Procedures and Assembly Procedures for Mechanism
Chassis are separate volume from this service manual. / Please refer to the service manual for Z-
Mechanism Chassis. (Order No. VRD9802005C2)
2. GENERAL DESCRIPTIONS
2.1. SERVICE CAUTION-1
When the Microprocessor IC6001 and/or Back-up battery B6001 are replaced, read following
procedure carefully and proceed it.
[REASONS] / There is a RAM in the IC6001, which is backing up:
1. Programme Navigation Data
2. TV Tuning Data
3. PG Shifter Adjustment Data
4. Option Setting Data
When IC6001 and/or B6001 are replaced, all above listed data become not available.
These data is backing up by using the power source of:
*AC Connected
: AC Power source
*AC Disconnected
: Back-up Battery (B6001)
2.1.1. REPLACING PROCEDURE [IC6001/B6001]
[1. PREPARATION]
Before replacing IC6001 and/or B6001:
- Take a note that store TV broadcast channels. / (Because, its user
may store TV broadcasts by manually other than "Auto Tuning"
operation and it is also erased.)
- Back-up the Programme Navigation data. / (The Programme
Navigation data is transferable by using "Programme Navigation
Data Back-up Tool (VFK1493P)" (You may take make it by referring
following schematic diagram.)
-NECESSARY STATUS OF THE VCR UNIT-
1. The IC6001 should be comunicable with the Programme Navi.
Back-up Tool. (VFK1493P)
2. The "NAVI" data has to be available in IC6001.
NOTE:
During servicing, do not make short IC6001-pin 37 (5V) with other
2
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