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ORDER NO.VM1004027CE

VOL.1

Colour
(S)........Silver Type

2

PAGE

PAGE

1 Safety Precautions -----------------------------------------------3

1.1. General Guidelines ----------------------------------------3

2 Warning --------------------------------------------------------------4

2.1. Prevention of Electrostatic Discharge (ESD)

to Electrostatic Sensitive (ES) Devices ---------------4

2.2. Service caution based on legal restrictions----------5
2.3. Caution for AC Cord (For EB/GC/GA) ----------------6
2.4. How to Replace the Lithium Battery

(PROCEDURE)---------------------------------------------7

3 Service Navigation------------------------------------------------9

3.1. Service Information ----------------------------------------9
3.2. How to Define the Model Suffix (NTSC or PAL

model)------------------------------------------------------- 10

4 Specifications ---------------------------------------------------- 11
5 Location of Controls and Components------------------ 12
6 Service Mode ----------------------------------------------------- 15

6.1. Lock Search History Indication ----------------------- 16
6.2. Power ON Self Check Result Display--------------- 16
6.3. Lock Search History Clear ----------------------------- 17

7 Service Fixture & Tools --------------------------------------- 18

7.1. Service Tools and Equipment ------------------------- 18

8 Disassembly and Assembly Instructions --------------- 19

8.1. Disassembly Flow Chart-------------------------------- 19
8.2. P.C.B. Layout---------------------------------------------- 19
8.3. Disassembly Procedures------------------------------- 20
8.4. Disassembly Procedures of Camera Lens

Unit----------------------------------------------------------- 27

9 Measurements and Adjustments -------------------------- 29

9.1. EEPROM Data for spare parts of the MAIN

P.C.B.-------------------------------------------------------- 29

9.2. Service Positions ----------------------------------------- 29
9.3. Location for Connectors of the Main P.C.B. ------- 31
9.4. Electrical Adjustment ------------------------------------ 32

10 Maintenance ------------------------------------------------------ 34

10.1. Cleaning Lens and LCD Panel ----------------------- 34

11 Factory Setting--------------------------------------------------- 35

11.1. How to turn on the factory setting? ------------------ 35
11.2. What is the factory settings? -------------------------- 35

3

1. IMPORTANT SAFETY NOTICE

There are special components used in this equipment which are important for safety. These parts are marked by 

in the

Schematic Diagrams, Circuit Board Layout, Exploded Views and Replacement Parts List. It is essential that these critical parts
should be replaced with manufacturer’s specified parts to prevent X-RADIATION, shock fire, or other hazards. Do not modify
the original design without permission of manufacturer.

2. An Isolation Transformer should always be used during the servicing of AC Adaptor whose chassis is not isolated from the AC

power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal
injury from electrical shocks. It will also protect AC Adaptor from being damaged by accidental shorting that may occur during
servicing.

3. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or

damaged by the short circuit.

4. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly

installed.

5. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.

1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on

the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the
chassis, the reading should be between 1M

Ω and 5.2MΩ. When the exposed metal does not have a return path to the chas-

sis, the reading must be infinity.

1. Plug the AC cord directly into the AC outlet. Do not use

an isolation transformer for this check.

2. Connect “A” to exposed metallic part on the set. And con-

nect “B” to a good earth ground, as shown in Figure 1.

3. Use an AC voltmeter, with 1 k

Ω/V or more sensitivity, to

measure the potential across the resistor. 

4. Check each exposed metallic part, and measure the volt-

age at each point.

5. Reverse the AC plug in the AC outlet and repeat each of

the above measurements.

6. The potential at any point should not exceed 0.25 V RMS.

A leakage current tester (Simpson Model 229 or equiva-
lent) may be used to make the hot checks, leakage cur-
rent must not exceed 1/2 mA. 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.

Figure 1

4

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec-
trostatic Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semi-
conductor “chip” components. The following techniques should be used to help reduce the incidence of component damage caused
by electrostatic discharge (ESD).

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your

body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
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 alumi-

num 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 antistatic solder removal device. Some solder removal devices not classified as “antistatic (ESD protected)” can

generate electrical charge 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 packaged with leads electrically shorted together by conductive foam, aluminum foil or compara-
ble 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 harmless motion such as the

brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) suf-
ficient to damage an ES device).