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4.10 Compatibility and error rate adjustment
4.10.1 Preparation
Before disassembly and adjustment, back up the data stored in
the EEPROM (IC1504 on the DV MAIN board) using the Service
Support System Software (SSS software).
Table 4-13-1 shows the important service points for the compat-
ibility and error rate adjustments.
Linearity
adjustment
Drum
Required
replacement
Note 1
Transport part
Required
replacement
Note 1
Transport part
Required
(drum) repair
Note 1
IC4001(PRE/REC
amp on DV MAIN
Not
board) replacement
IC2001(PB. EQ on
DV MAIN board)
Not
replacement
DV MAIN board
replacement
Not
Note 2
Table 4-13-1
Note 1 :
• The linearity adjustment is required only after servicing or re-
placing the drum or the take up/supply guide rail.
Note 2 :
• After replacing the DV MAIN board, write the original data in
the EEPROM of the new board. If write communication is not
possible, mount the original EEPROM on the new board.
When adjustments of more than one item are required, use the
following order for the adjustments.
4.10.3 Linearity adjustment
4.10.4 PB switching point adjustment
4.10.5 Error rate adjustment
4.10.2 Adjustment
The actual adjustment requires the following preparation.
4.10.2.1 Tools required for adjustment
Alignment tape
US : MC-1
PAL : MC-2
SSS software
PTU94016-5
US : QAM0099-002
PAL : QAM0099-005
Fig.4-10-1
1-30 (No.YD085)
PB Switching
Error rate
point
adjustmenmt
adjustment
Required
Required
Not
Check
Not
Check
Not
Check
Not
Required
Required
Required
Guide driver
Jig connector cable
YTU94085
PTU94018B
PC cable
Jig RCU
PTU94023B
4.10.2.2 Procedure
(1) Take out the 6 screws, then remove the top cover. (See
SECTION 3 DISASSEMBLY)
(2) Connect the jig connector cable to CN2001 on the DV
MAIN board.
Jig Connector Cable
PTU94018B
Fig.4-10-2
4.10.2.3 Setup for computer adjustment
-Setup by extending the jig connector-
Connect the Jig Connector Cable and setup the SSS software. It
automatically becomes the TCCS mode and "TCCS" is displayed
on the FDP.
To cancel the TCCS mode, press the CANCEL button of the remote
control unit.
The "TCCS" display on the FDP disappears.
<JLIP>
Fig.4-10-3
Service Support Software
RS-232C Port
JVC
MENU
PC Cable
Personal Computer
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