JVC SR-VS30U Service Manual

2-39
Adjustment Item
Linearity PB Switching Error Rate
Adjustment
Point Adjustment Adjustmenmt
Service Point
2.13 COMPATIBILITY AND ERROR RATE ADJUSTMENTS
2.13.1 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 2-18-1 shows the important service points for the com-
patibility and error rate adjustments.
Drum replacement Required Required Required
Note 1
Transport part Required Not Check
replacement Note 1
Transport part Required Not Check
(drum) repair Note 1
IC4001
(PRE/REC amp on Not Not Check
DV MAIN board)
replacement
IC2001
(PB. EQ on DV Not Not Required
MAIN board)
replacement
DV MAIN board
replacement Not Required Required
Note 2
Note 1 :
• The linearity adjustment is required only after servicing or
replacing 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.
2.13.2 Adjustment
The actual adjustment requires the following preparation.
1. Tools required for adjustment
Alignment tape
US : MC-1
PAL : MC-2
SSS software
PTU94016-4
Guide driver
YTU94085
Jig connector cable
PTU94018B
PC cable
US : QAM0099-002
PAL : QAM0099-005
Jig RCU
PTU94023B
2. Procedure
1. Take out the 6 screws, then remove the top cover. (See
Fig. COM1 on page 1-2 of section 1.4.)
2. Connect the jig connector cable to CN2001 on the DV
MAIN board.
Fig. 2-13-2
DV MAIN PWB
Jig Connector Cable
PTU94018B
CN2001
CN1501
CN1503
CN3701
Table 2-13-1
2.18.3 Linearity Adjustment
∫
2.18.4 PB Switching Point Adjustment
∫
2.18.5 Error Rate Adjustment
Fig. 2-13-1
Fig. 2-13-3
Service Support Software
RS-232C Port
PC Cable
Personal Computer
JVC
MENU
INITIAL MODE
DATA CODE
CUSTOM CODE
43: A CODE
[Data transmitting method]
Depress the “ ” ( 3 ) button
after the data code is set.
Jig RCU
[PTU94023B]
DV MAIN PWB
CN2001
CN1501
CN1503
CN3701
<JLIP>
– Setup by extending the jig connector –
When performing the adjustment by the SSS software, set the VCR
to JIG mode by transmitting the code "menu", "2", "8", and "OK" in
order from the Jig RCU, and set the VCR to external communication
mode by transmitting the code "8C" from the Jig RCU.
3. Setup for computer adjustment

JVC SR-VS30U Specifications

General

Brand	JVC
Model	SR-VS30U
Category	VCR
Language	English