29
VL-Z1U
10. METHOD OF ADJUSTING THE ELECTRIC CIRCUIT
-Before making adjustment-
· It seems that, in most cases, this adjusting method is used when it becomes necessary to adjust the electric circuit as a result of
replacement of worn mechanism parts or the video head. When adjusting the electric circuit, check that the mechanism operates
properly (the mechanism is adjusted completely). If a failure occurs in the electric circuit, be sure to locate the fault using a
measuring instrument and then perform repairing, replacement and adjustment, as described in this adjusting method.
Avoid performing undue adjustments etc. without using proper measuring instruments.
· The electric circuit components in the circuit board unit of this product are densely-packed into packages. Most of them are surface-
mounted for downsizing.
When replacing components in servicing the product, perform replacement work swiftly with a soldering iron.
In general, surface-mounted components are inferior in heat resistance to large-sized discrete components used in TV sets,
stationary decks, etc. Heating the electrode of a surface-mounted component with a soldering iron for a long time needlessly will
therefore lead to a failure. Take great care not to do so.
Take special care in this respect when replacing chip multilayer capacitors in particular.
We recommend you to use a ceramic soldering iron (Tip temperature: 250
°
C, Contact time: 5 seconds or less).
10-1. Adjustment of liquid crystal video section
List of measuring jigs
VL-Z1U Specifications of service jigs
· Color monitor TV
· Digital voltmeter
· DC power source
· Audio generator
(CR oscillator)
· Frequency counter
· AC adapter
· Stereo AV output cable (supplied)
· Adjustment remote control
(RRMCG0033TASA)
· Signal generator
(NTSC pattern generator LCG-401/
401YC: Manufactured by Leader)
· Oscilloscope
· Vector scope
· Tape for recording
· DC cable (supplied with AC adapter)
· Extension wire of video section
· Alignment tape
90ADDVC-TAPE (color bar)
· Error rate adjustment tape (reference tape)
RTPEVA001WJZZ
No.
Connection section
Connector REF. No.
No. of pins
New/
Parts cord
Price
Cont.
code
1
H/A PWB — MAIN PWB
1
SC307—SC3302
33P
N
QPWBHB737WJZZ
AN
2
H/A PWB — MAIN PWB
2
SC308—SC3301
33P
N
QPWBHB737WJZZ
AN
4
MAIN — LITHIUM PWB
SC8800—SC5800
27P-25P
QPWBHB742WJZZ Product FPC used
AE
5
MAIN — RUNTA005WJZZ
SC1201
80P
C
QCNW-1373TAZZ
BQ
6
RUNTA005WJZZ — SUB
P2901
80P
N
RUNTZA005WJZZ
AX
8
Menu key — SUB
SC2002—SC501
9P-15P
QPWBHB772WJZZ Product FPC used
AE
9
H/A PWB — MAIN PWB
P301—P3301
5P
QCNW-B171WJZZ Product wire used
AF
10
TP jig for envelope checking
P3303
30B-B
N
RUNTZA004WJZZ
AW
11
Power supply
SC310—SC2101
12P
QCNW-B167WJZZ Product FFC used
AC
12
ZOOM
SC311—SC2201
10P
C
QPWBHB746WJZZ
AE
13
CCD PWB — MAIN
SC1001—SC1202
33P
QPWBHB738WJZZ Product FPC used
AD
14
Lens unit — SUB
SC551
25P
CLNS-A005RMA5 Product unit used
BQ
15
MIC — SUB
P3602
4P
RMiCC0108TAZZ Product unit used
AP
17
MECHA TURN — MAIN
P1201
2P
DUNTKB732PM00 Product unit used
AG
19
SPEAKER — ZOOM
P2201
2P
VSP0020P-B2WN Product unit used
AK
20
LCD UNIT — MAIN
SC1800/SC1801
18Px2
QPWBHB736WJZZ Product FPC used
AR
Содержание Viewcam VL-Z1U
Страница 26: ...26 VL Z1U 9 5 4 Diagram of greasing oiling locations ...
Страница 57: ...57 VL Z1U M E M O ...
Страница 58: ...59 58 VL Z1U VL Z1U 14 SCHEMATIC DIAGRAMS 14 1 OVERALL SCHEMATIC DIAGRAM ...
Страница 89: ...120 A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 VL Z1U 14 32 MECHA REVERSION DETECTION SCHEMATIC DIAGRAM ...
Страница 90: ...121 A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 VL Z1U 14 33 HOLE SENSOR UNIT SCHEMATIC DIAGRAM ...
Страница 107: ...140 VL Z1U M E M O ...