Service manual
24
VL-MC500U/K
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-MC500U/K 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 CPWBH2876TA01 Product unit use or AS
CPWBH2925TA01 Product unit use AR
3 Main—Battery Terminal SC900← 20B-B QTANZA005WJZZ Product unit use AM
4 Main—LCD SC2801—LCD 24 C QCNW-1382TAZZ or BD
QCNW-1274TAZZ AZ
5 Main—Inverter PWB SC2802—SC9801 8 C QPWBHB329WJZZ Product unit use or AD
QCNW-1768TAZZ Product unit use(With DC5, use)
BF
6 Main—CCD PWB P1200—P102 14 QCNW-A490WJZZ Product unit use AH
7 Main—Cam PWB SC1201—SC1001 33 QPWBHB327WJZZ Product unit use AS
8 Main—Card PWB SC1202—SC1503 33 QPWBHB327WJZZ Product unit use AS
9 CCD—Cam PWB SC101—SC1002 27 QPWBHB326WJZZ Product unit use AE
10 Card—Flash Unit SC1502← 12 QPWBHB328WJZZ Product unit use AF
11 CCD—Turn SW Unit P101← 3 QSW-ZA009WJZZ Product unit use AG
12 Card—Li Unit P1504← 2 RUNTKA027WJZZ Product unit use AG
13 CAM—Power/SW Unit SC501← 17 QPWBHB332WJZZ Product unit use AF
QSW-ZA008WJZZ Product unit use AP
QSW-ZA012WJZZ Product unit use AZ
14 TP Jig for Envelope SC3302← 10PB-B C RUNTKA003WJZZ BF
confirmation
15 Main—Sperker P600← 2 VSP0020P-A1WN Product unit use AK
16 Cam—Lens SC2501← 20 Direct connection —
17 Inverter—Lamp SC9802—Lamp 4 Direct connection : High tension caution —