MANUAL SERVICE
E780U/E785U/E785T-VL MODELS NTSC 8 CAMCORDER CRYSTAL LIQUID
VL-VLE780U-E780U
VL-VLE785U-E785U
VL-VLE785T-E785T
SERVICE MANUAL
SY8A8VL-E780U
LIQUID CRYSTAL CAMCORDER 8 NTSC
VL-E780U
VL-E785U
MODELS VL-E785T
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified be used.
In this Service Manual, only the differences from VL-E760U/765U are described. Therefore, for the parts which are not described in this Service Manual, refer to the Service Manual for VL-E760U/765U (S38N2VL-E760U).
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CONTENTS |
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Page |
2. SPECIFICATIONS .............................................................................................................................. |
2 |
4. DISASSEMBLY OF THE SET ............................................................................................................. |
3 |
5. MECHANISM ADJUSTMENT ............................................................................................................. |
4 |
6. ADJUSTMENT OF VCR ...................................................................................................................... |
4 |
8. SCHEMATIC DIAGRAMS ........................................................................................................... |
....... 8 |
11.REPLACEMENT PARTS LIST ...................................................................................................... |
... 29 |
12.PACKING OF THE SET .......................................................................................................... |
......... 35 |
This document has been published to be used for
SHARP CORPORATION after sales service only.
1The contents are subject to change without notice.
VL-E780U
VL-E785U
VL-E785T
2. SPECIFICATIONS
Signal System: NTSC standard
Recording System: 2 rotary heads, helical scanning system Cassette: 8 mm video tape, MP type
Recording/Playback Time: 120 minutes (P6-120) Tape Speed: 14.345 mm/second
Pickup Device: 1/4" (6.4mm, effective size: 4.5 mm) CCD image sensor (with approx. 270,000 pixels including optical black)
Lens: 16 × power zoom lens (F1.4, f=4.0-64.0 mm) and full-range auto focus Lens Filter Diameter: 46 mm
Monitor: 4" (10.1 cm) full-color LCD screen (TFT active matrix) Microphone: Electret monaural microphone
Color Temperature Compensation: Auto white balance
Minimum Illumination: 0.8 lux (5 lux measured by EIA standard) (with gain-up, F1.4) Video Output Level: 1.0 Vp-p 75-ohm unbalanced
Audio Output Level: –8 dBs, impedance less than 2.2 kohms Speaker Output: 200 mW
Power Requirement: DC 3.6V
Power Consumption: 5.3W (during camera recording in full auto mode with zoom motor off, Extend Zoom, DIS and Snapshot functions off, and backlight in normal mode)
Operating Temperature: 0°C to + 40°C (32°F to 104°F) Operating Humidity: 30% to 80%
Storage Temperature: –20°C to +60°C (–4°F to 140°F) Dimensions (approx.): 7 5/32" (W) × 4 9/32" (H) × 3 7/8" (D)
[182 mm (W) × 109 mm (H) × 99 mm (D)] Weight (approx.): 1.57 lbs (710g)
(without battery pack, lithium battery, video cassette, and lens cap)
AC Adapter/Battery Charger UADP-0274TAZZ(VL-E780U/E785U) UADP-0275TAZZ(VL-E785T)
Power Requirement: AC 110-240 V, 50/60 Hz DC Output: 4.5 V
Power Consumption: 16 W
Dimensions (approx.): 2 31/32" (W) × 2" (H) × 5 5/16" (D) [75 mm (W) × 51 mm (H) × 135 mm (D)]
Weight (approx.): 0.65 lbs (295 g)
Specifications are subject to change without notice.
Battery Pack BT-H22
DC Output: 3.6V
Dimensions (approx.): 2 1/8" (W) × 3/4" (H) × 2 7/32" (D) [54 mm (W) × 19 mm (H) × 56 mm (D)]
Weight (approx.): 0.30 lbs (136 g)
*MinimumSERVICEillumination:INFORMATIONSince there is no widely(ForacceptthedUtesting.S.) procedure for determining minimum illumina-
tion capability, lux ratings are comparable only between models from the same For the location of the nearest Sharp Authorized Service, or to obtain product literature, accessories,
manufacturer.
supplies or customer assistance, please call 1-800-BE SHARP (1-800-237-4277) or visit SHARP's web site (http://www.sharp-usa.com)
2
4. DISASSEMBLY OF THE SET
4-2. Disassembly of the VCR main body
1. Removal of the VCR lid shaft
(1)Remove one screw ((j)LX-HZ0063TAFC).
VL-E780U
VL-E785U
VL-E785T
Area A
(j)
4-3. REPLACEMENT OF CCD SENSOR
4-3-1. BEFORE REPLACEMENT
1)The CCD image sensor is more sensitive to electrostatic breakage than C-MOS LSI. Therefore sufficient means to prevent electrostatic damage must be taken when it is replaced.
∙Ground the soldering iron.
∙Ground also the human body, using the wrist strap(through an 1 Mohm resistor).
∙Until the CCDsensor is mounted on the PWB, fit it to the conductive sponge, and short-circuit the foot lead.
2)Take utmost care so that the surface glass of CCD sensor and optical filter are not contaminated and damaged. If any contamination is found, for example fingerprint, wipe it off with silicon paper or clean chamois skin.
3)When replacing the CCD sensor, use the antistaic grounded soldring iron, and perform quickly soldering.
Index Mark |
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JAPAN
SHARP
LZ2413H5
YYWWXXX
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14 |
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4-4. INITIAL SETTING OF E2PROM IC
4-4-2. IC702 (E2PROM)
When the IC702 has been replaced, make the following settings and adjustments.
1.Remove the backup battery (CR2025)
2.Turn power switch to CAMERA
3.Setting up the V ADJ mode as follows.
* After press the CONTINUE key, press the VCR ADJ key on service remote control (RRMCG0033TASA).
address |
E780U |
E785U |
E785T |
data |
data |
data |
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03 |
F8 |
FA |
FE |
0B |
07 |
05 |
01 |
01 |
00 |
00 |
00 |
09 |
FF |
FF |
FF |
04 |
00 |
00 |
00 |
0C |
FF |
FF |
FF |
02 |
01 |
01 |
07 |
0A |
FE |
FE |
F8 |
3
VL-E780U
VL-E785U
VL-E785T
5. MECHANISM ADJUSTMENT
5-2. Items and timings of inspection and maintenance
5-2-1. Inspection and maintenance list
system travel Tape
system Driving
check Performance
Checking/Maintenance point |
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Usage time (hrs.) |
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Possible symptom |
Remarks |
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500 |
1,000 |
1,500 |
2,000 |
3,000 |
encountered |
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Tape travelling route |
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• Lateral noise |
Rollers |
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• Unclean head |
• If abnormal rotation or |
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• Screen shaking |
deflection (significant) is |
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Drum (Refer to Section) |
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found, replace the roller. |
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Other than rollers |
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• Clean the tape contact- |
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Video head |
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• Improper S/N ratio |
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ing areas. Be sure to |
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• No color appears. |
use the specified clean- |
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ing agent. |
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Timing belt |
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• Tape does not run. |
• Replace if failure |
is |
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• Tape slackens. |
found. |
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Pinch roller |
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• Screen shakes. |
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Capstan D.D. motor |
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Relay Pulle shaft |
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• Abnormal sound |
• Apply oil. |
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Pulle gear shaft |
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(Oil: |
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Note: |
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Drive gear shaft |
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After oil is applied to the |
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drive gear shaft, slightly |
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wipe it off with swab. |
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Loading motor |
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• Not ejectable |
• Replace if failure (abnor- |
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• The specific mode can- |
mal sound) is detected. |
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not be set. |
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Abnormal sound |
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• If conformance to the |
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standard is not ensured, |
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PB/VS-REW take-up torque |
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replace part. |
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PB/VS-REW back tension |
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torque |
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Tu brake |
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HC (Head Cleaner) |
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Oil:
Grease: MORYCOAT YM-103/X5-6020 Screw locking agent: THERE BOND 1401B Cleaning liquid: Industrial-use ethyl alcohol
: Replace. |
: Apply oil. |
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: Clean. |
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: Check. |
5-4. ADJUSTMENT OF MECHANISM TAPE TRAVEL SYSTEM
5-4-3. Adjusting the Si roller height
(2)Adjusting the Si roller
1 Playback the tape such as to set the V/SR mode.
6.ADJUSTMENT OF VCR
6-1. ADJUSTMENT OF VCR SECTION
6-1-5. Y/C circuit adjustment method
2. Adjustment of input Y level
Measuring instrument |
Oscilloscope |
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Mode |
VCR STOP |
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Input signal |
Color bar |
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500±20mVp-p |
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Measuring point |
TL801 |
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Adjustment address |
32 |
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Adjustment level |
500 Vp-p ± 20 mVp-p |
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4
VL-E780U VL-E785U VL-E785T
3. Adjustment of playback Y level
Measuring instrument |
Oscilloscope |
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Mode |
PB |
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Playback signal |
Color bar (JiGWR5-5NSP) |
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Measuring point |
TL801 |
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Adjustment address |
27 |
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Adjustment level |
500 Vp-p ± 20 mVp-p |
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5. Adjustment of Y-FM deviation |
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Measuring instrument |
Oscilloscope |
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Mode |
REC/PB (self-playback/recording) |
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Input signal |
Color bar |
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Measuring point |
TL801 |
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Adjustment address |
34 |
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Adjustment level |
500 Vp-p ± 20 mVp-p |
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500±20mVp-p
500±20mVp-p
6-1-7. Adjustment of LCD display circuit
9. Inverter input voltage setting
Measuring point |
LCD panel display surface |
Address |
11, 12 |
Mode |
VCR AV input |
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Adjusting method |
Set the data of address 11 and 12. |
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Adjustment standard |
11=C5 |
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12=A4 |
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Remarks |
——————— |
6-2. ADJUSTMENT OF CAMERA SECTION
6-2-1. Servicing of camera section
• Connections for Camera Section Servicing
15pin |
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Connect FPC |
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between the |
17pin |
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camera and |
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the VCR. |
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QPWBH2814TAZZ
LENS |
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SC4 |
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SC6 |
SC3 |
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20pin |
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SC2 19 pin
SC3 15 pin
SC4 17 pin
SC6 20 pin
20pin |
SC2 |
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19pin |
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CCD PWB
19pin
QPWBH2815TAZZ
5
VL-E780U
VL-E785U
VL-E785T
6-2-2. Adjustment procedures 6-2-2-2. Auto focus adjustment
Measuring instrument |
None |
Subject |
— |
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Tape |
— |
Test point |
None |
Adjustment address |
1FF |
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Adjustment level |
09, 0A, 0B |
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` Preparation for 6-2-2-3~6-2-2-9, setup the camera signal adjustment mode. (Write 00 to the address 1FE.)
6-2-2-3.
Before starting these adjustments, set up the auto focus adjust. ∙ Sync level adjustment
Measuring instrument |
Oscilloscope |
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Subject |
Anything |
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Tape |
— |
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Test point |
VIDEO OUT (Terminated in 75Ω) |
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Adjustment address |
1F8 |
1H |
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Adjustment level |
286mVp-p |
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1) Connect the oscilloscope to the VIDEO-OUT. Adjust the sync level to 286mVp-p.
6-2-2-9.
∙ Auto white balance adjustment
Measuring instrument |
Vector scope |
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Subject |
Gray scale |
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Tape |
— |
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Test point |
VIDEO OUT (Terminated in 75 Ω) |
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Adjustment address |
R-OUT DOOR 016 |
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B-OUT DOOR 018 |
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Adjustment level |
R-OUT DOOR; 0 ± 3 % |
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B-OUT DOOR; 0 ± |
3 % |
Video
R-Y
Spot
B-Y
Center point
SYNC 286mVp-p
1)Attach the color temperature conversion filter (JIGHOYA-LB165) to the front of the lens.
2)Using the addresses R-OUT DOOR 016 and B-OUT DOOR 018, adjust the spot to the center.
3)Take off the color temperature conversion filter.
` Write FF to the address 1FE to exit from the camera signal adjustment mode.
6
VL-E780U
VL-E785U
VL-E785T
- M E M O -
7
VL-E780U
VL-E785U
VL-E785T
8. SCHEMATIC DIAGRAMS
8-2. POWER CIRCUIT SCHEMATIC DIAGRAM
H
G
F |
Π|
E
D
C
B |
(1/4) |
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3 4 |
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1 2 |
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MAP: |
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A |
LOCATION |
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1 |
M |
2 |
L |
3 |
K |
4 |
J |
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5
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Œ
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H |
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7
6
5
4
3
2
1
7G
8
(2/4)
34
MAP:LOCATION 12
7
G
8
F
9
ΠAND SHADED COMPONENTS=SAFETY RELATED PARTS
E |
10 |
D |
11 |
C |
12B |
VL-E780U
VL-E785U
VL-E785T
7
6
5
4
3
2
1
13A
9
VL-E780U
VL-E785U
VL-E785T
H
G
F
E
D
C
B |
(3/4) |
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3 4 |
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1 2 |
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MAP: |
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A |
LOCATION |
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M |
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L
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K
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J
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H
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12
11
10
9
8
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7 |
G |
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10
(4/4)
34
MAP:LOCATION 12
7
G
8
F
9
E
10
D
11
C
VL-E780U
VL-E785U
VL-E785T
13
12
11
10
9
8
7
B |
A |
12 |
13 |
11
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