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36
VL-Z1U
The same adjusting procedure and connections as
described for the VCR section are used.
ADJUSTMENT OF LCD CIRCUIT
When making this adjustment, set the backlight switch to "Normal".
(Wiring board diagram: Main Side A)
(Wiring board diagram: LCD Side A)
1. Setteing of parameters (Main PWB)
* Preset the following data.
C818
R827
C821
C809
R825
R826
R807
R808
R806
8
12
TL845
C810
D800
C811
TL846
TL850
TL802
TL844
TL848
TL849
C817
TL847
SC802
TL803
TL846(LCD_VG)
LCD_contrast
2. Adjustment of VF_COM amplitude (Main PWB)
Measurement point
TL8801(VF_COM)
Address
VCR ADJ 32
Procedure
1) Set the data value at address 5EB (TESTSW2) to 77.
2) Connect the digital voltmeter to TL8801 (VF_COM). At address 32 (VF_DAC_C), adjust the DC
voltage to the adjustment rating.
Adjustment rating
3.75V
±
50mV
Examples
· Replacement of IC705
3. Adjustment of VF_DAC full scale (Main PWB)
Measurement point
TL7824(VF_G_OUT)
Address
VCR ADJ 59E
Procedure
1) Set the data values at addresses 587 (GRYLEV)/58C (
γ
PEAK)/5EB (TESTSW2) and 5E6 (OSDSW)
to FF/80/77 and 00, respectively. (The LED shows nothing.)
2) Set the data values at addresses 5A0 (CLAMP)/58D (PEDESTAL) and 5B9 (VCLK3 INV) to 00/80 and
48, respectively.
3) Connect the digital voltmeter to TL7824 (VF_G_OUT) and measure the DC voltage.
* The measured voltage is (DA_VF-G).
4) Set the data values at addresses 5A0 (CLAMP) and 58D (PEDESTAL) to 80 and 00, respectively.
5) At address 59E (VF_DAC_G), adjust the DC voltage to the adjustment rating.
6) Preset the data values at addresses 59D (VF_DAC_B) and 59F (VF_DAC_R) so that they are the
same as the data value at address 59E (VF_DAC_G).
7) Reset the data at addresses 587 (GRYLEV)/58C (
γ
PEAK)/58D (PEDESTAL)/5A0 (CLAMP)/5B9
(VCLK3 INV)/5E6 (OSDSW) and 5EB (TESTSW2) to their original values.
(Initial values: 40/C5/38/28/42/71 and 7F)
Adjustment rating
DA_VF-G +0.23V
±
10mV
Examples
· Replacement of IC705, IC4401
4. Adjustment of VF_WB (Main PWB)
Measurement point
TL8804(VF_VG), TL8805(VF_VR), TL8806(VF_VB)
Address
VCR ADJ 58E, 590
Procedure
1) Set the data values at addresses 587 (GRYLEV) and 5E6 (OSDSW) to 80 and 70, respectively.
2) Connect the oscilloscope to TL8804 (VF_VG) and TL8805 (VF_VR), and at address 58E (VF_WB-
R), adjust the amplitude to the adjustment rating.
3) Connect the oscilloscope to TL8804 (VF_VG) and TL8806 (VF_VB), and at address 590
(VF_WB_B), adjust the amplitude to the adjustment rating.
Adjustment rating
0mV
±
40mV, 0.1mV
±
40mV
Examples
· Replacement of IC705, IC4401, IC8801
Address
046 047 048 049 099 0A5 0A6 0A7 0B5 406 407 408 409 427 435 40A 40B 41E
NTSC
1E
54
6B
76
01
40
7E
15
64
7F
7F
20
20
E7
24
70
70
00
PAL
—
—
—
—
—
—
—
—
69
—
—
—
—
E5
—
—
—
—
Address
090 098 09A 0A3 0A4 097 40E 40F 42B 42D 42F
NTSC
7F
—
40
91
96
C2
—
—
—
—
—
PAL
—
00
21
A2
A8
C9
14
14
03
09
06
2
SC1800
TL1431
C1438
R1442
C1810
C1439
L18
0
C1402
C1441
L1404
R1406
C1408
IC1431
C1416
C1407
C1410
R1405
IC1401
C1409
C1418
R1441
R1440
C1437
R1413
C1440
R6800
R1403
C1417
R1461
Q1405
C1436
R6810
R1404
R1421
C1419
R6813
R1462
Q1403
Q1434
4
406
R1424
C6800
R6812
C6807
R6804
R6803
R6802
R1423
R1414
R1438
R1439
Q6801
C
4481
R6805
C
R6807
C6801
C6802
R6817
TL6804
C6804
Q1404
R6809
TL6803
R6806
R6816
R6808
C4406
D6800
C6805
C6812
C6811
L6800
TL7819
TL6809
R6811
TL6802
TL6801
IC6801
TL6807
9
4
C6806
C6810
R6819
C6815
C6813
R6820
R6818
C6816
C6814
L7800
C7800
R7828
R7831
IC4401
R7827
R7826
R7829
IC7802
C
7
803
TL6807(G_OUT)
DAC full scale
Summary of Contents for Viewcam VL-Z1U
Page 26: ...26 VL Z1U 9 5 4 Diagram of greasing oiling locations ...
Page 57: ...57 VL Z1U M E M O ...
Page 58: ...59 58 VL Z1U VL Z1U 14 SCHEMATIC DIAGRAMS 14 1 OVERALL SCHEMATIC DIAGRAM ...
Page 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 ...
Page 107: ...140 VL Z1U M E M O ...