Service manual
24
VL-AX1U
10. ADJUSTING THE ELECTRICAL CIRCUITS
Before starting the electric circuit adjustment
• The adjustment methods described herein are used, in most cases, when the expendable mechanical parts, including
the video head, have been replaced, at which time the electrical circuits need to be readjusted. Before adjusting the
electrical circuits, make sure that the mechanism works properly (i.e., the mechanism is properly adjusted). Incase of
the occurrence of any problem to the electrical circuits, be sure to use the specified measuring instruments to locate
the area to which the problem is occurring, and then take the necessary action, including repair, replacement or
adjustment, exactly as instructed in the electrical adjustment methods that will follow.
Do not attempt to make adjustments without using the proper measuring instruments.
• This machine is configured so that the electrical circuits inside its PWB unit are composed, for the most part, of high-
density, small surface-mounted component parts for downsized machine body.
To perform repair service or parts replacement, do so using a soldering iron, but in as short a time as possible; this is
because surface-mounted component parts are generally so small in size and susceptible to heat, as compared with
the large discrete parts used in TV sets, desk-top video decks, etc., that attempting to heat their electrodes for a longer
time than is necessary with a soldering iron may result in their becoming defective.
This applies particularly when replacing the laminated chip capacitors.
For this purpose, ceramic soldering irons with a temperature regulator are recommended (iron tip temperature 250°C
and soldering time 5 seconds or shorter).
VL-AX1U Specifications of service jigs
No. Connection section Connector REF. No.
No. of pins
New or
Part cord
Price
Continuation
code
1 H/A PWB–H/A FPC P306 80B-B C QCNW-1832TAZZ BV
2 H/A FPC–MAIN SC3301 80B-B CPWBH2925TA01 Product unit use AR
3 MAIN PWB–SUB PWB SC5701, SC5702 39P QPWBH3224TAZZ Product unit use AE
4 MAIN PWB–SUB PWB SC5703 45P QPWBH3225TAZZ Product unit use AF
5 Power SW–MAIN PWB SC703 17P QSW-Z0370TAZZ Product unit use AR
6 V/F–MAIN PWB SC8801 21P DCOVA1793TAK1 Product unit use AS
7 DV/232C/ZOOM SW– SC5704 21P RUNTK0411TAZZ Product unit use AT
MAIN PWB
8 AVS/EJECT SW– SC1401 21P RUNTK0409TAZZ Product unit use AT
MAIN PWB
9 Hot shoe–SUB PWB SC6602 12P QPWBH3227TAZZ Product unit use AG
10 Battery Terminal– SC900 20B-B QTANZ0149TAZZ Product unit use AQ
MAIN PWB
11 VCR operation–SUB PWB SC3707 10P QSW-ZA002WJZZ Product unit use AV
12 Focus Ring Unit– SC701 10P RUNTK0410TAZZ Product unit use AQ
MAIN PWB
13 Camera Operation FPC– SC3702 30B-B N QCNW-2067TAZZ BS
SUB PWB
14 Camera Operation FPC– 30B-B QSW-Z0371TAZZ Product unit use AZ
Camera Operation Unit
15 CAMCCD PWB– SC1002 39P CPWBH3087TA01 Product unit use AL
CAMCCD FPC
16 CAMCCD FPC– SC201 40B-B C QCNW-2001TAZZ BY
MAIN PWB
17 LCD PWB–MAIN PWB SC2801 33P QSW-Z0372TAZZ Product unit use AT
18
TP Jig for Envelope confirmation
SC3703 14B-B N RUNTK0414TAZZ BA
19 Built-in microphone– P6601 4P RMiCC0106TAZZ Product unit use AQ
SUB PWB