Panasonic MW-20EB User manual

© Panasonic Corporation 2010. All rights reserved.
Unauthorized copying and distribution is a violation of
law.
PSG1010008CE
Digital Photo Frame
Model No. MW-20EB
MW-20EG
Product Color: (K)...Black Type
TABLE OF CONTENTS PAGE PAGE
1 Safety Precautions----------------------------------------------- 3
1.1. General Guidelines---------------------------------------- 3
1.2. Before Repair and Adjustment------------------------- 4
1.3. Protection Circuitry---------------------------------------- 4
1.4. Safety Part Information----------------------------------- 4
2 Warning-------------------------------------------------------------- 5
2.1. Prevention of Electro Static Discharge (ESD)
to Electrostatically Sensitive (ES) Devices---------- 5
2.2. Service caution based on Legal restrictions-------- 6
2.3. Caution for use of Battery ------------------------------- 6
3 Service Navigation----------------------------------------------- 7
3.1. Service Information --------------------------------------- 7
3.2. Troubleshooting Guide----------------------------------- 8
4 Specifications ----------------------------------------------------12
5 Location of Controls and Components ------------------13
5.1. Main Unit Key Button Operations---------------------13
5.2. Remote Control Key Button Operations ------------14
6 Operating Instructions-----------------------------------------15
6.1. Media Information ----------------------------------------15
6.2. About the internal memory, CDs and SDs---------16
6.3. Preparation for power source------------------------- 17
6.4. Connecting/Recharging an iPod/iPhone ----------- 18
6.5. Connection to PC ---------------------------------------- 19
7 Self Diagnostic and Doctor Mode Setting --------------20
7.1. Service mode ---------------------------------------------20
7.2. Doctor mode-----------------------------------------------24
8 Disassembly and Assembly Instructions---------------29
8.1. Disassembly flow chart---------------------------------30
8.2. Types of Screws------------------------------------------ 31
8.3. Main Parts Location Diagram------------------------- 31
8.4. Disassembly of Bottom Case Unit-------------------32
8.5. Replacement of Speaker (1) -------------------------- 33
8.6. Replacement of Speaker (2) -------------------------- 35
8.7. Disassembly of Main P.C.B.---------------------------37
8.8. Replacement of Top Case Unit-----------------------40
8.9. Replacement of Rear Panel Unit---------------------43
8.10. Disassembly of IR P.C.B. ------------------------------45
8.11. Disassembly of Panel P.C.B.--------------------------46

2
8.12. Disassembly of Led P.C.B.-----------------------------47
9 Service Position-------------------------------------------------49
9.1. Checking & Repairing of Main P.C.B. (Side A) ---49
9.2. Checking & Repairing of Main P.C.B. (Side B) ---51
10 Voltage Measurement & Waveform Chart---------------52
10.1. Main P.C.B. (1/2) -----------------------------------------52
10.2. Main P.C.B. (2/2) -----------------------------------------53
10.3. Panel P.C.B.-----------------------------------------------53
10.4. Waveform Chart ------------------------------------------54
11 Illustration of IC’s, Transistors and Diodes ------------56
12 Overall Simplified Block--------------------------------------57
13 Block Diagram ---------------------------------------------------58
13.1. SYSTEM CONTROL BLOCK DIAGRAM ----------58
13.2. AUDIO/PHOTO PLAYBACK BLOCK
DIAGRAM--------------------------------------------------59
13.3. IC TERMINAL CHART----------------------------------60
13.4. POWER SUPPLY BLOCK DIAGRAM--------------61
14 Wiring Connection Diagram---------------------------------63
15 Schematic Diagram Notes -----------------------------------64
16 Schematic Diagram---------------------------------------------65
16.1. MAIN(1) CIRCUIT (1/4)---------------------------------65
16.2. MAIN(1) CIRCUIT (2/4)---------------------------------66
16.3. MAIN(1) CIRCUIT (3/4)---------------------------------67
16.4. MAIN(1) CIRCUIT (4/4)---------------------------------68
16.5. MAIN(2) CIRCUIT (1/2)---------------------------------69
16.6. MAIN(2) CIRCUIT (2/2)---------------------------------70
16.7. MAIN(3) CIRCUIT----------------------------------------71
16.8. MAIN(4) CIRCUIT (1/4)---------------------------------72
16.9. MAIN(4) CIRCUIT (2/4)---------------------------------73
16.10. MAIN(4) CIRCUIT (3/4)---------------------------------74
16.11. MAIN(4) CIRCUIT (4/4)---------------------------------75
16.12. PANEL / IR / LED CIRCUIT ---------------------------76
17 Printed Circuit Board ------------------------------------------77
17.1. MAIN P.C.B. (Side A)------------------------------------77
17.2. MAIN P.C.B. (Side B)------------------------------------78
17.3. PANEL / IR / LED P.C.B. -------------------------------79
18 Exploded View and Replacement Parts List-----------80
18.1. Exploded View and Mechanical replacement
Parts List ---------------------------------------------------80
18.2. Electrical Replacement Parts List--------------------85

3
1 Safety Precautions
1.1. General Guidelines
1. 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.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
3. After servicing, carry out the following leakage current checks to prevent the customer from being exposed to shock hazards.
1.1.1. 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 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 1MΩand 5.2MΩ. When the exposed metal does not have a return path to the chas-
sis, the reading must be
1.1.2. Leakage Current Hot Check
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a 1.5kΩ, 10 watts resistor, in parallel with a 0.15μF capacitors, between each exposed metallic part on the set and a
good earth ground such as a water pipe, as shown in Figure 1.
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 and repeat each of the above measurements.
6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent)
may be used to make the hot checks, leakage current must not exceed 1/2 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.
Figure. 1

4
1.2. Before Repair and Adjustment
Caution : DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
• Current consumption at AC 100V - 240V, at 50/60Hz in NO SIGNAL mode at volume min should be ~150 mA.
1.3. Protection Circuitry
The protection circuitry may have operated if either of the following conditions are noticed:
• No sound is heard when the power is turned on.
• Sound stops during a performance.
The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are
"shorted", or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.
If this occurs, follow the procedure outlines below:
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again after one minute.
Note:
When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.
1.4. Safety Part Information
Safety Parts List:
There are special components used in this equipment which are important for safety.
These parts are marked by in the Schematic Diagrams, Exploded View & Replacement Parts List. It is essential that these
critical parts should be replaced with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the
original design without permission of manufacturer. Table 1
Safety Ref. No. Part No. Part Name & Description Remarks
1 L5EDD2M00009 LCD MODULE
15 ML-614S/ZTN BATTERY
35 RGN3008A-K NAME PLATE
A2 RFEA609E-AA AC ADAPTOR
A3 VQT2Z88 O/I BOOK (En) EB
A3 VQT2Z89 O/I BOOK (Ge/It/Fr/Du) EG
A3 VQT2Z90 O/I BOOK (Da/Sw/Sp/Cz/Po) EG
A9 RFE0218 AC PLUG EG
A10 RFE0219 AC PLUG EB
L1700 J0ZZB0000103 FILTER
IP101 ERBSE3R00U CHIP FUSE

5
2Warning
2.1. Prevention of Electro Static Discharge (ESD) to Electrostatically Sensi-
tive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec-
trostatically Sensitive (ES) 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 electrostatic discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equiped 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 equiped with ES devices, place the assembly on a conductive surface such as alumin-
ium foil, to prevent electrostatic charge build up 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 remover device. Some solder removal devices not classified as “anti-static (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, aluminium 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).

6
2.2. Service caution based on Legal restrictions
2.2.1. General description about Lead Free Solder (PbF)
The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this
equipment in considering the globally environmental conservation.
The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin
(Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86°F) more than that
of the normal solder.
Definition of PCB Lead Free Solder being used
Service caution for repair work using Lead Free Solder (PbF)
• The lead free solder has to be used when repairing the equipment for which the lead free solder is used.
(Definition: The letter of “PbF” is printed on the PCB using the lead free solder.)
• To put lead free solder, it should be well molten and mixed with the original lead free solder.
• Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC.
• Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt the
lead free solder.
• Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 350±30 degrees
C (662±86°F).
Recommended Lead Free Solder (Service Parts Route.)
• The following 3 types of lead free solder are available through the service parts route.
RFKZ03D01K-----------(0.3mm 100g Reel)
RFKZ06D01K-----------(0.6mm 100g Reel)
RFKZ10D01K-----------(1.0mm 100g Reel)
Note
* Ingredient: Tin (Sn), 96.5%, Silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%
2.3. Caution for use of Battery
This unit uses battery for operation.
Service caution for repair work when battery (Battery Pack, Dry Battery, Backup Coin Battery etc) is used.
• Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manu-
facturer. Dispose of used batteries according to the manufacturer’s instructions.
Note : Refer to P.C.B. diagram for location of the battery
The letter of “PbF” is printed either foil side or components side on the PCB using the lead free solder.
(See right figure)

7
3 Service Navigation
3.1. Service Information
This service manual contains technical information which will 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, this information will be followed by supplement service manual to be filed with original service
manual.
•FLASH MEMORY & NAND FLASH MEMORY IC:
1) The following components are supplied as an assembled part.
- FLASH MEMORY IC, (IC1003) (RFKWNFMW20D0)
- NAND FLASH MEMORY IC, (IC1700) (RFKWFMW20EB)

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3.2. Troubleshooting Guide
3.2.1. No Power Supply
No
AC adaptor / DC Jack Faulty
Yes
No
IP101 abnormal
Yes
No
IC108 abnormal
Yes
No
IC104/X100 abnormal
No
IC104/PANEL P.C.B/IR P.C.B/FFC
Yes
No
Q104/QR105 abnormal
Yes
No
Check IC100 circuit
Yes
No
IC1001/IC1002 circuits
Yes
No
IC1008/X1004 circuits
Yes
No
IC1009 abnormal
Yes
No Power
+6V at JK100 between
Pin 2
-
3
Check continuity at
IP101
Is there +3.3V at
pin 4 at IC108 ?
Oscillating signal
at IC104 ?
㪧㪦㪮㪜㪩㩷㪪㪮㪆㪩㪜㪤㪦㪫㪜㩷㪚㪦㪥㪫㪩㪦㪣
㪧㫀㫅㩷㪐㩷㪸㫋㩷㪠㪚㪈㪇㪋㩷
㪂㪍㪭㩷㩽㩷㪂㪌㪭㩷㪭㪦㪣㪫㪘㪞㪜㩷
㪘㪫㩷㪨㪈㪇㪋㩷㪖
+3.3V at
LB118
Is there output at IC1001
/IC1002 ?
Is there oscillator signal at
IC1008 ?
RESET signal at
IC1009 - high ?
IC1000 or ROM/RAM check
27M/24M/24.576M
/16.93M/12.28M
Yes

9
3.2.2. LCD No display
No
IC1505 circuit
No
PANEL P.C.B / IR P.C.B / FFC
㪰㪼㫊
No
Q1502/Q1500/D15024/IC1503 abnormal
㪰㪼㫊
No
Q1500/D15024/IC1503 abnormal
㪰㪼㫊
No
IC1503 abnormal
㪰㪼㫊
No
IC1504 abnormal
㪰㪼㫊
No
Q1501 abnormal
㪰㪼㫊
No
LCD Module
㪰㪼㫊
No
LCD Module
㪰㪼㫊
No
IC1000 abnormal
㪰㪼㫊
No display on LCD
Module
+10V at Pin 1 & 2
of CN1002 ?
+10V at Pin 1 & 2
at CN920 ?
VCOM(-1.55V)
CN1301 Pin 1
VGL(-13V)
CN1301 Pin 2
㪭㪞㪟㩿㪈㪇㪭㪀
㪚㪥㪈㪊㪇㪈㩷㪧㫀㫅㩷㪊
㪭㪛㪧㪘㩿㪌㪅㪌㪭㪀
㪚㪥㪈㪊㪇㪈㩷㪧㫀㫅㩷㪋
㪭㪛㪥㪘㩿㪄㪌㪅㪌㪭㪀
㪚㪥㪈㪊㪇㪈㩷㪧㫀㫅㩷㪍
㪥㪘㪭㪛㪛㩿㪄㪌㪅㪉㪭㪀
㪚㪥㪈㪊㪇㪈㩷㪧㫀㫅㩷㪈㪌
㪧㪘㪭㪛㪛㩿㪄㪌㪅㪉㪭㪀
㪚㪥㪈㪊㪇㪈㩷㪧㫀㫅㩷㪊㪇
Is there control signal
at pin 1 and 5 at CN1302 ?
㪣㪚㪛㩷㪤㫆㪻㫌㫃㪼
LCD Module connection
No display on LCD
Module

10
3.2.3. No Sound output
or
C166 Voltage Terminal Check
NO
˵ES
Voltage at 5V5.5V˛
D-AMP IC, IC110
Oscillating Signal Check
Power Supply Check
ˠ111 & ˠ112
NO
˵ES
D-AMP IC, IC110
Ԥto GND
oscillation check
Is there oscillating
si
g
nal˛
NO
Yes
D-AMP IC, IC110
CTL Voltage Check
High Voltage˛(+3V˅
D-AMPǂIC
IC110 Check
Ľpinǃľpin
Voltage Check
IC1000 Mute &
STBY Line
Abnormality
DAC IC, IC109
Output Check
NO
˵ES
Output OK˛
D-AMPǂIC, IC110
DAC Output Check
AUDIO_RST Check
NO
YES
High Voltage ?˄+3V˅
IC1000
AUDIO_RST line
abnormality
X200 oscillating signal
abnormality
AUDIO_RST Check
IC109 VCC
Voltage supply
check
DSPǂIC,
IC106 Check
NO
˵ES
BCLK
DATAǂLRCK
MCLK Check
CLOCKǂOK˛
ADC IC, IC103 Check
24.576MHz Oscillating circuit
DSP IC,ǂIC106 abnormal
NO
䌙㪜㪪
Clock generation at IC1008
SDǂAudio
Is there output
signal ?
Check IC101 for
abnormality
Check IC101 &
iPod connection
IC103ǂ
VCC
No Sound Output