Panasonic Lumix Dmc gh1 Series Service Manual Repair Guide

							
© Panasonic Corporation 2009. Unauthorized copy-
ing and distribution is a violation of law.
ORDER NO. DSC0905029CEB26
Digital Camera/Lens Kit
Model No.DMC-GH1KPP
       DMC-GH1KEB
       DMC-GH1KEC
       DMC-GH1KEG
       DMC-GH1KGC
       DMC-GH1KGH
       DMC-GH1KGK
       DMC-GH1KGN
       DMC-GH1KGT
 
Colour
(K)...........Black Type
(N)...........Gold Type (only PP/EC/EG/GC)
(R)...........Red Type (only PP/EB/EC/EG/GC) 
						

							
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TABLE OF CONTENTS
PA G E PA G E
1 Safety Precaution ------------------------------------------------- 3
1.1. General Guidelines ---------------------------------------- 3
1.2. Leakage Current Cold Check ---------------------------3
1.3. Leakage Current  Hot Check (See Figure 1.) -------- 3
1.4. How to Discharge the Capacitor on Flash Sub PCB ------------------------------------------------------------4
2Warning -------------------------------------------------------------- 5
2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices ----------5
2.2. How to Recycle the Li thium Ion Battery (U.S.
Only) ----------------------------------------------------------- 5
2.3. Caution for AC Cord(For EB/GC/GH) ----------------- 6
2.4. How to Replace the Lithium Battery -------------------7
3 Service Navigation ------------------------------------------------ 8
3.1. Introduction -------------------------------------------------- 8
3.2. Important Notice --------------------------------------------8
3.3. General Description About Lead Free Solder (PbF) -------------------------------------------------------- 11
3.4. How to Define the Model Suffix (NTSC or PAL model) ------------------------------------------------------- 12
4 Specifications ---------------------------------------------------- 15
5 Location of Controls and Components ------------------16
6 Service Mode ----------------------------------------------------- 32
6.1. Error Code Memory Function ------------------------- 32
7 Troubleshooting Guide ---------------------------------------- 34
8 Service Fixture & Tools --------------------------------------- 38
8.1. Service Fixture and Tools ------------------------------ 38
8.2. Clean Box -------------------------------------------------- 39
8.3. Service Position ------------------------------------------ 40
9 Disassembly and Assembly Instructions ---------------41
9.1. Disassembly Flow Chart-------------------------------- 41
9.2. PCB Location---------------------------------------------- 41
9.3. Disassembly Procedure -------------------------------- 42
9.4. Disassembly and Assemble Procedure for the Lens --------------------------------------------------------- 53
10 Measurements and Adjustments --------------------------55
10.1. Matrix Chart for Replaced Part and Necessary Adjustment ------------------------------------------------- 55
11 Maintenace -------------------------------------------------------- 57
11.1. Notice in external cleaning----------------------------- 57
11.2. General description (Lens cleaning) ---------------- 58
11.3. Method of cleaning inside of lens (H- VS014140: Included in DMC-GH1K) ---------------- 59 
						

							
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1 Safety Precaution
1.1. General Guidelines
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 essen-
tial that these critical parts should be replaced with manu-
facturer’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 acci-
dents resulting in personal injury from electrical shocks. It
will also protect AC Adaptor from being damaged by acci-
dental shorting that may occur during servicing.
3. When servicing, observe the orig inal lead dress. If a short
circuit is found, replace all parts which have been over-
heated or damaged by the short circuit.
4. After servicing, see to it that all the protective devices such as insulation barriers, in sulation papers shields are
properly installed.
5. After servicing, make the following leakage current checks to prevent the cust omer from being exposed to
shock hazards.
1.2. 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 ohmmeter, between the jumpered AC plug and each exposed metal-
lic cabinet part on the equipment such as screwheads,
connectors, control shafts, etc. When the exposed metal-
lic part has a return path to the chassis, the reading
should be between 1 M Ω and 5.2 M Ω. When the exposed
metal does not have a return path to the chassis, the
reading must be infinity.
1.3. 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 1.5 k Ω, 10 W resistor, in parallel with a 0.15  μF
capacitor, between each exposed metallic part on the set
and 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 0.75 V RMS. A leakage current tester (Simpson Model 229 or equiva-
lent) may be used to make th e 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 re turned to the customer.
Figure. 1 
						

							
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1.4. How to Discharge the Capacitor on Flash Sub PCB
CAUTION:1.Be sure to discharge the capacitor on FLASH SUB PCB.
2. Be careful of the high voltage circ uit on FLASH SUB PCB when servicing.
[Discharging Procedure] 1. Refer to the disassemble procedure and remove the necessary parts/unit.
2. Put the insulation tube onto the le ad part of Resistor (ERG5SJ102:1kΩ /5W).
(An equivalent type of resistor may be used.)
3. Put the resistor between both terminals of capacitor on FLASH SUB PCB for approx. 5 seconds.
4. After discharging confirm that the capacitor voltage is lower than 10V using a voltmeter.
Fig. F1 
						

							
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2Warning
2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically 
Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by  static electricity. Such components commonly are called Elec-
trostatically Sensitive (ES) Devices.
The following techniques should be used to help reduce the in cidence 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 an d 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 remo val 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 generat e 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 lead s 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).
2.2. How to Recycle the Lith ium Ion Battery (U.S. Only) 
						

							
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2.3. Caution for AC Cord(For EB/GC/GH)
2.3.1. Information for Your Safety
IMPORTANTYour attention is drawn to the fact that recording of pre-
recorded tapes or discs or other published or broadcast
material may infringe copyright laws.
WARNING To reduce the risk of fire or shock hazard, do not expose
this equipment to  rain or moisture.
CAUTION To reduce the risk of fire or shock hazard and annoying
interference, use the recommended accessories only.
FOR YOUR SAFETY  DO NOT REMOVE THE OUTER COVER
To prevent electric shock, do not remove the cover. No user
serviceable parts inside. Refer servicing to qualified service
personnel.
2.3.2. Caution fo r AC Mains Lead
For your safety, please read the following text carefully.
This appliance is supplied with a moulded three-pin mains plug
for your safety and convenience.
A 5-ampere fuse is fitted in this plug.
Should the fuse need to be replaced please ensure that the
replacement fuse has a rating of 5 amperes and it is approved
by ASTA or BSI to BS1362
Check for the ASTA mark or the BSI mark on the body of the
fuse.
If the plug contains a removable fuse cover you must ensure
that it is refitted when the fuse is replaced.
If you lose the fuse cover, the plug must not be used until a
replacement cover is obtained.
A replacement fuse cover can be purchased from your local
Panasonic Dealer.
If the fitted moulded plug is unsuitable for the socket outlet in
your home then the fuse should be removed and the plug cut
off and disposed of safety.
There is a danger of severe electr ical shock if the cut off plug is
inserted into any  13-ampere socket.
If a new plug is to be fitted please observe the wiring code as
shown below.
If in any doubt, please consult a qualified electrician.
2.3.2.1. Important
The wires in this mains lead are coloured in accordance with
the following code:
As the colours of the wires in the mains lead of this appliance
may not correspond with the coloured markings identifying the
terminals in your plug, proceed as follows:
The wire which is coloured BLUE must be connected to the ter-
minal in the plug which is marked with the letter N or coloured
BLACK.
The wire which is coloured BROWN must be connected to the
terminal in the plug which is marked with the letter L or coloured
RED.
Under no circumstances should either of these wires be con-
nected to the earth terminal of  the three pin plug, marked with
the letter E or the Earth Symbol.
2.3.2.2. Before Use
Remove the Connector Cover as follows.
2.3.2.3. How to Replace the Fuse
1. Remove the Fuse Cover with a screwdriver.
2. Replace the fuse and attach the Fuse cover.
Blue Neutral
Brown Live 
						

							
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2.4. How to Replace the Lithium Battery
2.4.1. Replacement Procedure
1. Remove the AUDIO PCB. (Refer to Disassembly Procedures.)
2. Remove the Lithium battery (Ref. No. “B4001” at foil  side of AUDIO PCB) and then replace it into new one.
NOTE: This Lithium battery is a critical component. 
(Type No.: ML-421S/ZTE  Manufactured by Energy Company, Panasonic Corporation. )
It must never be subjected to excessive heat or discharge.
It must therefore only be fitted in requirement designed specifically for its use.
Replacement batteries must be  of same type and manufacture.
They must be fitted in the same manner and location as t he original battery, with the correct polarity contacts observed.
Do not attempt to re-charge  the old battery or re-use it for any other purpose.
It should be disposed of in waste products destined for burial rather than incineration.
NOTE: Above caution is applicable for a battery pack which is for DMC-GH1K series, as well. 
						

							
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3 Service Navigation
3.1. Introduction
This service manual contains technical information, which allow service personnel’s to understand and service this model.
Please place orders using the parts list  and not the drawing reference numbers.
If the circuit is changed or modified, the information will be  followed by service manual to be controlled with original servic e manual.
3.2. Important Notice
*When servicing, it is recommended dealing  with Clean box. (Refer to 8.2. Clean Box section of this service manual for detail s.)
3.2.1. Camera Body Unit
3.2.1.1. About Mount Box Block (Ref. 7)
1. This Service Manual does not contain the repair service in formation for MOUNT BOX BLOCK(Ref.7), because it requires
special facilities and equipment.
a. Schematic diagram, Block diagram and  P.C.B. layout of MOUNT BOX BLOCK.
b. Parts list for individual parts of MOUNT BOX BLOCK
2. If the MOUNT BOX BLOCK is confirm ed as defective, exchange the MOUNT BO X BLOCK as a unit (supplied as service
parts size).
3. Before exchange the MOUNT BOX BLOCK, the performances  must be carefully checked, by following the 7.Troubleshoot-
ing Guide section of this service manual.
Fig. S1 
						

							
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Important:
1. After replacing the MOUNT BOX BLOCK, the  mount box data has to be stored to the unit.
When the serial number of the mount box block which is put on th e shield plate of mount box block is entered to the adjust-
ment unit, the applicable data is stored into the MAIN P.C.B.
For more details, consult the adjustment in struction which is available together with the Maintenance software at software
download on the Support Info rmation from NWBG/VDBG-AVC  web-site in TSN system.
Fig. S2
2. The full adjustment procedures must be performed after repl acing the MOUNT BOX BLOCK, otherwise picture quality can
not be meet with  specification.
3.2.1.2. About Main P.C.B. (Ref . 1) / Audio P.C.B. (Ref. 3)
1. This Service Manual does not contain t he repair service information for MAIN P.C.B.(Ref.1) and “AUDIO P.C.B.”(Ref.3),
because it requires specia l facilities and equipment.
a. Schematic diagram, Block diagram and P.C.B.  layout of MAIN P.C.B. / “AUDIO P.C.B.”.
b. Parts list for individual parts of MAIN P.C.B. / “AUDIO P.C.B.”.
2. When a part replacement is required for repairing MAIN P.C. B. and “AUDIO P.C.B.”, replace as an assembled P.C.B. parts
and send it/them to Central Repair Center.
3. The following category is recycle module part. Please send it/them to Central Repair Center. *MAIN P.C.B. (VEP56084A:  DMC-GH1KPP/GC/GH/GK/GN/GT)
*MAIN P.C.B. (VEP56084 B: DMC-GH1KEB/EC/EG)
*AUDIO P.C.B. (VEP54012A): Excluding  replacement of Lithium Battery
Important (About Main P.C.B.): 1. Before exchange the MAIN P.C.B., the performances must be  carefully checked, by following the 7.Troubleshooting Guide
section of this service manual.
2. Before replacing the MAIN  P.C.B., proceed the EEPROM dat a backup from the unit. After replacing the MAIN PCB, over-
write the EEPROM data with backup data from the un it first, then proceed the adjustment /inspection.
If it is impossible to make a data backup due to the unit do es not turns on the power and so on, additional adjustment (using
the light box) is required.
For more details, consult the adjustment in struction which is available together with the Maintenance software at software
download on the Support Info rmation from NWBG/VDBG-AVC  web-site in TSN system.
3. The full adjustment procedur es must be performed after replacing the MAI N P.C.B., otherwise Picture quality can not be
meet with specification. 
						

							
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3.2.2. Lens Unit
3.2.2.1. About Lens MAIN Block unit (Ref. 215)
1. This Service Manual does not contain the repair service  information for LENS MAIN BLOCK UNIT(Ref.215), because it
requires special facilities and equipment.
2. LENS MAIN BLOCK UNIT performance mu st be confirmed with the 7.Troubleshooting Guide section of this service man-
ual.
3. In case of the LENS MAIN BLOCK UNIT defect, co ntact to the service department of sales company.
Fig. S3
3.2.2.2. About Lens Cleaning (Inside of the Lens Unit)
1. When there is a dust/dirt inside surface of  the 1st lens frame unit and/or subject side of the 2nd lens frame unit, it can be
cleaned up by removing the Hood Adapto r (Ref.202) and 1st lens frame unit.
Refer to the 11.Maintenance Section  of this service Manual, for details.
IMPORTANT: IT MUST BE PERFORMED INSIDE  OF SATISFIED CLEAN LEVEL
(Satisfied clean level: Less than class 10,000 Federal Standard 209D).
As for clean box, refer to the 8.2. Clean box in details.
3.2.2.3. About Flexible Cable and Connector
Do not touch carelessly so that the foreign body should not  adhere to the terminal part of flexible cable and connector.
Wipe off with a clean cloth and the cotton b ud, etc. when the terminal part is dirty.