Electrical Adjustment (Dv); Preparation; Precautions; Equipment Required For Adjustment - JVC SR-VS30U Service Manual

3.6 PREPARATION

3.6.1 Precautions

(1) The DV section of this model is based on a special ad-
justment method using a PC. However, ordinary adjust-
ment is required only when the part listed below has been
replaced. In this case, the adjustment should be per-
formed by a service center equipped with the required
facilities.
2
• E PROM (IC1504 on DV main board)
In case of trouble with the electrical circuitry, First iden-
tify the faulty position with a measuring tool as described
below. Proceed to repair, replacement and/or adjustment
only after the troubleshooting.
(2) When observing a chip TP, use an IC clip or similar tool
to protect the chip against stress. When replacing a chip
part (IC, particularly), remove solder completely before
replacing. (This is to prevent separation of the pattern.)
(3) The connectors are fragile. Be careful when plugging or
unplugging a wire.

3.6.2 Equipment required for adjustment

1 Personal computer (Windows compatible)
2 Color monitor
3 Oscilloscope (2-CH, 100 MHz or more)
4 Frequency counter

3.6.3 Tools required for adjustments

Alignment tape Jig connector cable
US : MC-1 PTU94018B
PAL : MC-2
PC cable Jig RCU
US : QAM0099-002 PTU94023B
PAL : QAM0099-005
Fig. 3-6-3a
3-7

ELECTRICAL ADJUSTMENT (DV)

SSS software
PTU94016-4

3.6.4 Setup

1. Setup for computer adjustment
— 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.
Jig RCU
[PTU94023B]
INITIAL MODE
DATA CODE
CUSTOM CODE
[Data transmitting method]
43: A CODE
Depress the " " ( 3 ) button
after the data code is set.
<JLIP>
Fig. 3-6-4a Setup for Computer Adjustment
Service Support Software
RS-232C Port
JVC
MENU
PC Cable
Personal Computer