Panasonic RR-QR230E Service Manual ▷ View online
Power requirement :
DC 3.0 V (2 AAA size/LR03
batteries)
Power output :
300 mW (max.)
Frequency response :
300 Hz to 5,000 Hz (HQ mode)
300 Hz to 3,400 Hz (FQ mode)
300 Hz to 2,700 Hz (SP mode)
S/N :
37 dB (HQ mode)
Output jack :
Earphone, ø 3.5 mm; 0.5 mW 16
Ω
Input jack :
Mic, ø 3.5 mm; 0.56 mV plug in
power
Speaker :
20 mm 8
Ω
1 Safety Precautions
3
1.1.
GENERAL GUIDELINES
3
1.2.
Protection Circuitry
3
2007 Co. .
RR-QR230E
Colour
(K)..........Black Type
Dimensions (W x H x D) :
Max dimensions :
39.3 mm x 105.5 mm x 17.2 mm
Cabinet dimensions :
38.8 mm x 105 mm x 14 mm
Mass :
With drycell batteries :
Approx. 60 g
Without batteries :
Approx. 37 g
Operational temperature range :
0 °C to 40 °C
Memory capacity :
64 MB
Battery life :
[When used at 25 °C on a flat,
stable surface]
Notes :
1. Specifications are subject to change without notices.
1.3.
Safety Part Information
3
2 Prevention of Electro Static Discharge (ESD) to
Electrostaticy Sensitive (ES) Devices
4
IC Recorder
Specification
CONTENTS
Page
Page
ORDER NO. MD0703032CE
3 Handling the Lead-free Solder
5
3.1.
Service caution based on legal restrictions
5
4 Operating Procedures
6
4.1.
Components of IC Recorder
6
4.2.
Test Mode
7
5 Assembling and Disassembling
13
5.1.
Notes
13
5.2.
Disassembly flow chart
13
5.3.
Main Parts Location Diagram
14
5.4.
Disassembly of Rear Cabinet Assembly
15
5.5.
Disassembly of the Main P.C.B
16
5.6.
Disassembly of the LCD Spacer
16
5.7.
Disassembly of the Speaker
17
6 Voltage Measurement & Waveform Chart
18
6.1.
Voltage Measurement
18
6.2.
Waveform Chart
20
7 Wiring Connection Diagram
21
8 Block Diagram
23
9 Notes Of Schematic Diagram
25
10 Schematic Diagram
27
11 Printed Circuit Board Diagram
31
12 Illustration of IC's, Transistors and Diodes
33
13 Exploded Views
34
13.1. Cabinet Parts Location
34
13.2. Packaging
35
14 Replacement Parts List
36
2
RR-QR230E
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, make the following leakage current checks to prevent the customer from being exposed to shock hazards.
1.2. 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.
· 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.
· No sound is heard when the power is turned on.
· 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.
When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.
1.3. 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 & 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.
specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of manufacturer.
Table 1
Reference No.
Part No.
Part Name & Description
Remarks
ICP2
D4FBR7500008
IC RESETTABLE FUSES
[M]
3
RR-QR230E
2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by electricity. Such components commonly are called
Electrostatically 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 electro static discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equiped assembly, drain off any ESD on your
Electrostatically 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 electro static 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.
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 aluminium
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 removal device. Some solder removal devices not classified as “anti-static (ESD protected)” can
4. Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static (ESD protected)” can
generate electrical charge 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
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
comparable conductive material).
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
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)
sufficient to damage an ES device).
sufficient to damage an ES device).
4
RR-QR230E