AG-TL750E, AG-TL750B — Panasonic Provideo Service Manual (repair manual)

Model
AG-TL750E AG-TL750B
Pages
90
Size
11.71 MB
Type
PDF
Document
Service Manual
Brand
Device
Provideo / TIME LAPSE RECORDER
File
ag-tl750e-ag-tl750b.pdf
Date

View Panasonic AG-TL750E / AG-TL750B Service Manual online

 
.
ORDER NO. BSD0111M631
AG-TL750E/B
Time Lapse Recorder
- 2 -
Specifications
!    
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not
contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered
by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or
products dealt with in this service information by anyone else could result in serious injury or death.
- 3 -
CONTENTS
SAFETY PRECAUTIONS........................................................5
SECTION 1
SERVICE CAUTIONS AND DISASSEMBLY...........................1-1
1.1 DISASSEMBLY OF MAJOR PARTS.............................1-1
1.1.1 Disassembly Flow Chart ........................................1-1
1.1.2 Replacing the Fuse................................................1-1
1.1.3 Removing the Top Cover.......................................1-1
1.1.4 Removing the Front Panel Assembly.....................1-1
1.1.5 Removing the Bottom Cover..................................1-2
1.1.6 Removing the Cassette Housing Assembly ...........1-2
1.1.7 Removing the Mechanism Assembly.....................1-2
1.2 DIAGNOSTICS OF MAJOR PC BOARDS ....................1-3
1.2.1 Diagnosing the MAIN and DECK TERMINAL
Boards ................................................................1-3
1.2.2 Diagnosing the FRONT 1 and FRONT 2 Boards ...1-3
1.2.3 Diagnosing the SW REG. Board............................1-3
1.2.4 Diagnosing the P/R Board .....................................1-4
1.2.5 Replacing the Lithium Battery................................1-4
1.3 SERVICE MENU...........................................................1-5
1.3.1 Menu Configuration and Operation Procedure.......1-5
1.3.2 Function ................................................................1-6
1.3.3 Hour meter ............................................................1-6
1.3.4 Emergency history.................................................1-6
1.3.5 Mecha check mode ...............................................1-8
1.4 LITHIUM BACKUP BATTERY.......................................1-10
1.4.1 Battery Replacement Caution ................................1-10
1.4.2 Time/Date Backup.................................................1-10
1.5 EEPROM ......................................................................1-10
1.6 CIRCUIT PROTECTORS..............................................1-10
1.7 RESETTING THE MICROCOMPUTER
IN CASE OF A RUNAWAY........................................1-10
SECTION 2
MECHANISM REPAIR/ADJUSTMENT PROCEDURES .........2-1
2.1 BEFORE MAKING REPAIR/ADJUSTMENT .................2-1
2.1.1 Precautions ...........................................................2-1
2.1.2 How to unload the cassette tape manually ............2-1
2.1.3 Special tools Required for Adjustment ...................2-1
2.1.4 Specifications of alignment tape ............................2-1
2.2 MAINTENANCE AND CHECK ......................................2-2
2.2.1 Location of main mechanical parts ........................2-2
2.2.2 Maintenance of main parts and periodical
reference ............................................................2-3
2.2.3 Cleaning ................................................................2-4
2.2.4 Lubrication.............................................................2-4
2.3 REPLACEMENT OF MAIN PARTS...............................2-4
2.3.1 Before removing ....................................................2-4
2.3.2 How to set to the mechanism assembly position ...2-4
2.3.3 Upper drum assembly ...........................................2-4
2.3.4 Brush assembly.....................................................2-5
2.3.5 Cleaner roller assembly .........................................2-5
2.3.6 Pinch roller arm assembly .....................................2-5
2.3.7 Tension band assembly.........................................2-5
2.3.8 Capstan motor, Capstan brake arm assembly.......2-6
2.3.9 Drum assembly .....................................................2-6
2.3.10 Clutch unit (S, T), Control plate, Reel disk (S, T) .2-7
2.3.11 Full-erase head....................................................2-9
2.3.12 A/C head assembly .............................................2-9
2.3.13 Belt (Loading) ......................................................2-9
2.3.14 Belt (Capstan, Housing).......................................2-10
2.3.15 Idler assembly .....................................................2-10
2.3.16 Sub brake assembly (T).......................................2-10
2.3.17 Sub brake assembly (S) ......................................2-10
2.3.18 Pole base assembly (S, T)...................................2-11
2.3.19 Guide flange (S, T) ..............................................2-11
2.3.20 Guide arm assembly............................................2-12
2.3.21 Loading motor, Motor pulley ................................2-12
2.3.22 Rotary encoder, Control cam ...............................2-12
2.3.23 Slide plate, Main brake assembly (S, T) ..............2-13
2.3.24 Slit disk (S, T) ......................................................2-14
2.3.25 Guide rail, Loading arm assembly (S, T)..............2-14
2.3.26 Pulley assembly ..................................................2-15
2.3.27 Worm gear assembly ..........................................2-16
2.4 HOW TO MOUNT THE MAIN PARTS
(Mechanism Phase Adjustment) ................................2-16
2.4.1 Before parts assembling ........................................2-16
2.4.2 Loading arm assembly (S, T).................................2-16
2.4.3 Rotary encoder, Change lever, Control cam ..........2-17
2.4.4 Slide plate..............................................................2-17
2.4.5 Control plate ..........................................................2-17
2.5 INTERCHANGEABILITY ADJUSTMENT ......................2-18
2.5.1 FM waveform linearity check/adjustment ...............2-18
2.5.2 A/C head assembly height, Azimuth
check/adjustment................................................2-19
2.5.3 A/C (Audio Control) head
phase (X value) check/adjustment ......................2-20
2.5.4 Tension arm position check/adjustment.................2-21
2.5.5 Take-up torque check ............................................2-21
2.5.6 Tape transport system check/adjustment ..............2-21
SECTION 3
ELECTRICAL ADJUSTMENTS...............................................3-1
3.1 PRECAUTIONS BEFORE PROCEEDING
TO ELECTRICAL ADJUSTMENTS............................3-1
3.2 EQUIPMENT REQUIRED FOR
ELECTRICAL ADJUSTMENTS .................................3-1
3.2.1 Measuring Instruments Required for Adjustments .3-1
3.2.2 Tools to be Prepared .............................................3-1
3.2.3 Signals Required for Adjustments..........................3-1
3.3 SERVICE MODES USED IN ADJUSTMENTS..............3-1
3.3.1 SERVO ADJUST MODE Setting Method...............3-1
3.3.2 EVR ADJUST MODE Setting Method....................3-1
3.4 SERVO ADJUSTMENTS ..............................................3-2
3.5 VIDEO ADJUSTMENTS................................................3-4
SECTION 4
BLOCK DIAGRAMS & SCHEMATIC DIAGRAMS &
CIRCUIT BOARD DIAGRAMS ................................................4-1
4.1 OVERALL WIRING DIAGRAMS ...................................4-3
4.2 SYSCON/SERVO BLOCK DIAGRAM ...........................4-4
4.3 VIDEO BLOCK DIAGRAM ............................................4-5
4.4 AUDIO BLOCK DIAGRAM ............................................4-6
4.5 MAIN BOARD SCHEMATIC DIAGRAMS......................4-7
4.5.1 SYSCON/SERVO..................................................4-7
4.5.2 VIDEO (1/3)...........................................................4-8
4.5.3 VIDEO (2/3)...........................................................4-9
4.5.4 VIDEO (3/3)...........................................................4-10
4.5.5 AUDIO ...................................................................4-11
4.5.6 REGULATOR ........................................................4-12
4.6 MAIN/COME MIX CIRCUIT BOARDS ...........................4-13
4.7 DECK TERMINAL BOARD SCHEMATIC DIAGRAM ....4-14
4.8 DECK TERMINAL CIRCUIT BOARD ............................4-15
4.9 FRONT1,2 BOARD SCHEMATIC DIAGRAM................4-16
4.10 FRONT1 CIRCUIT BOARD.........................................4-17
4.11 FRONT2 CIRCUIT BOARD.........................................4-17
4.12 SW REG. BOARD SCHEMATIC DIAGRAM ...............4-18
4.13 SW REG. CIRCUIT BOARD .......................................4-19
4.14 P/R BOARD SCHEMATIC DIAGRAMS.......................4-20
4.14.1 VIDEO .................................................................4-20
4.14.2 AUDIO .................................................................4-21
4.15 P/R CIRCUIT BOARD .................................................4-22
4.16 CONNECT BOARD SCHEMATIC DIAGRAM..............4-23
4.17 CONNECT CIRCUIT BOARD .....................................4-23
4.18 SENSOR BOARD SCHEMATIC DIAGRAM ................4-23
4.19 SENSOR CIRCUIT BOARD ........................................4-23
SECTION 5
EXPLODED VIEWS & REPLACEMENT PARTS LIST............5-1
5.1 CABINET & CHASSIS ASSEMBLY ..............................5-2
5.2 MECHANISM ASSEMBLY ............................................5-4
5.3 PACKING ASSEMBLY..................................................5-6
ELECTRICAL REPLACEMENT PARTS LIST..........................5-8
Page
Page
- 4 -
GENERAL GUIDELINES
1.  When servicing, observe the original lead dress. If a
short circuit is found, replace all parts which have been
over-heated or damaged by the short circuit.
2.  After servicing, see to it that all the protective devices
such as insulation barriers, insulation papers shields are
properly installed.
3. After servicing, make the following leakage current
checks to prevent the customer from being exposed to
shock hazards.
LEAKAGE CURRENT COLD CHECK
1. Unplug the AC cord and connect a jumper between the
two prongs on the plug.
2. Measure the resistance value, with an ohm meter,
between the jumpered AC plug and each exposed
metallic cabinet part on the equipment such as
screwheads, connectors, control shafts, etc. The
resistance value must be more than 5M
.
Figure1
LEAKAGE CURRENT HOT CHECK (See Figure 1)
1. Plug the AC cord directly into the AC outlet.
Do not use an isolation transformer for this check.
2. Connect a 1.5K
, 10W resistor, in parallel with a 0.15
µ
 F
capacitor, between each exposed metallic part on the set
an a good earth ground such as a water pipe, as shown
in Figure1.
3. Use an AC voltmeter, with 1000 ohms/volt or more
sensitivity, to measure the potential across the resistor.
4. Check each exposed metallic part, and measure the
voltage at each point.
5. Reverse the AC plug in the AC outlet repeat each of the
above measurements.
6. The potential at any point should not exceed 0.15 volts
RMS. A leakage current tester (Simpson Model 229
equivalent) may be used to make the hot checks,
leakage current must not exceed 0.1 milliamp. In case a
measurement is outside of the limits specified, there is a
possibility of a shock hazard, and the equipment should
be repaired and rechecked before it is returned to the
customer.
ELECTROSTATICALLY SENSITIVE (ES) DEVICES
Some semiconductor (solid state) devices can be damaged
easily by static electricity. Such components commonly are
called Electrostatically sensitive (ED) Devices. Examples of
typical ES devices are integrated circuits and some field-
effect transistors and semiconductor “chip” components. The
following techniques should be used to help reduce the
incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor
component or semiconductor-equipped assembly, drain
off any electrostatic charge on your body by touching a
known earth ground.
Alternatively, obtain and wear a commercially available
discharging wrist trap device, which should be removed
for potential shock reasons prior to applying power to the
unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface
such as alminum foil, to prevent electrostatic charge
buildup or exposure of the assembly.
3. Use only a grounded tip soldering iron to solder or
unsolder ES devices.
4. Use only an anti-static solder removal device classified
as “anti-static” can generate electrical charges sufficient
to damage ES devices.
5. Do not use freon-propelled chemicals. These can
generate electrical charges sufficient to damage ES
devices.
6. Do not remove a replacement ES device from its
protective package until immediately before you are
ready to install it.
(most replacement ES devices are package with leads
electrically shorted together by conductive foam,
alminum foil or comparable conductive material).
7. Immediately before removing the protective material from
the leads of a replacement ES device, touch the
protective material to the chassis or circuit assembly into
which the device will be installed.
CAUTION : Be sure no power is applied to the chassis or
circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged
replacement ES devices. (Otherwise hamless motion
such as the brushing together of your clothes fabric or
the lifting of your foot from a carpeted floor can generate
static electricity sufficient to damage an ES device).
X-RADIATION
WARNING
1. The potential source of X-radiation in EVF sets is the
High Voltage section and the picture tube.
2. When using a picture tube test jig for service, ensure that
jig is capable of handling 10kV without causing X-
Radiation.
Note :
It is important to use an accurate periodically
calibrated high voltage meter.
3. Measure the High Voltage. The meter (electric type)
reading should indicate 2.5kV,±0.15kV. If the meter
indication is out of tolerance, immediate service and
correction is required to prevent the possibility of
premature component failure. To prevent an X-Radiation
possibility, it is essential to use the specified picture tube.
  SAFETY PRECAUTIONS
Page of 90

Download Panasonic AG-TL750E / AG-TL750B Service Manual (Repair Manual)

Here you can view online or download Panasonic AG-TL750E / AG-TL750B Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Panasonic AG-TL750E / AG-TL750B Provideo. Information contained in Panasonic AG-TL750E / AG-TL750B service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).