
25
VL-Z700S-T
VL-Z800S-S/E-S/E-T/Z900H-S
VL-Z950S-S/E-A/E-S/E-T/E-W
9. 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).
9-1. Adjustment of liquid crystal video section
List of measuring jigs
VL-Z700S-T/Z800S-S/E-S/E-T/Z900H-S/Z950S-S/E-A/E-S/E-T/E-W 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)
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
C
QPWBHB737WJZZ
AN
2
H/A PWB — MAIN PWB
2
SC308—SC3301
33P
C
QPWBHB737WJZZ
AN
3
V/F — USB PWB
SC5801
18P
QPWBHC376WJZZ Product used
AF
4
MAIN — USB PWB
SC8800—SC5800
27P-25P
QPWBHB742WJZZ Product FPC used
AE
5
MAIN — RUNTA005WJZZ SC1201
80P
C
QCNW-1373TAZZ
BQ
6
RUNTA005WJZZ — SUB
P2901
80P
C
RUNTZA005WJZZ
AX
7
Hot shoe — SUB
Hot shoe—SC501
15P
QPWBHC377WJZZ Product FPC used
AK
8
Menu key — SUB
SC2002—SC501
9P-15P
QPWBHC377WJZZ Product FPC used
AK
9
H/A PWB — MAIN PWB
P301—P3301
5P
QCNW-B171WJZZ Product wire used
AF
10
TP jig for envelope checking
P3303
30B-B
C
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-A005HA50 Product unit used
CE
15
MIC — SUB
P3602
4P
RMiCCA009WJZZ Product unit used
AM
16
FLASH — MAIN
FLASH—SC1204
12P
QPWBHC378WJZZ Product FFC used
AE
17
MECHA TURN — MAIN
P1201
2P
DUNTKC372PM00 Product unit used
AG
19
SPEAKER — ZOOM
P2201
2P
VSP0020P-B3WN Product unit used
AL
20
LCD UNIT — MAIN
SC1800/SC1801
18Px2
QPWBHB736WJZZ Product FPC used
AR