Panasonic RFU-700-EG Service manual
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FM-AM 2-Band Receiver
RF-U700EG
Colour
(S)............Silver Type
ORDER No.AD0602005CE
Specifications
Frequency range:
FM; 87.50-108.00MHz (50kHz steps)
M; 522-1629kHz (9kHz steps)
Intermediate frequency:
FM; 10.65MHz
M; 459kHz
Speakers: Full range; 7.7cm, 8Ω ×2
Terminals:
Output; PHONES: 3.5mm stereo (32Ω)
Power supply:
C; 230V, 50Hz
Power consumption: 6.0W
Battery; 9V (Six R14/LR14 batteries)
Dimensions (W×D×H): 276.5mm×175.0mm×149.5mm
Mass: with batteries; 2000g
without batteries; 1800g
Power consumption if power off: 1.8W
Note:
Specifications are subject to change without notice.
Mass and dimensions are approximate.
CONTENTS
Page Page
1 Accessories 2
2 Disassembly for checking P.C.B., and Main Component
Replacement Procedures
2.1. Removal of the Main P.C.B. and Power Supply P.C.B.
2.2. Removal of the Control P.C.B.
2.3. Removal of the Operation P.C.B.
2.4. Checking of the P.C.B.
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2
3
4
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2.5. Removal of the Speaker
2.6. Remove of the LCD
2.7. Removal of the Giro Case
3 Schematic Diagram
3.1. Schmatic Diagram Notes
3.2. Schematic Diagram
4 Printed Circuit Board Diagram
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© 2005 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
RF-U700EG
5 Type Illustration of IC's, Transistors and Diodes 15
6 Wiring Connection Diagram
7 Terminal Function of IC's
7.1. IC502 (C2CBYY000074) :System Control / LCD Drive
8 Self Diagnosis and Lcd Test
8.1. Setting of self diagnostic Function
8.2. Existing the Service Mode
8.3. Error Codes
9 Check and Adjustment
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9.1. Tools and Instruments Required 19
9.2. Preparations
9.3. FM Adjustment
9.4. AM Adjustment
9.5. Adjustment Point
10 Replacement Parts List
11 Cabinet Parts Location
12 Packaging
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19
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1 Accessories
· Power supply code(RJA0019-D)...................................1pc.
2 Disassembly for checking P.C.B., and Main Component
Replacement Procedures
“ATTENTION SERVICER”
Some chassis components may have sharp edges.
Be careful when disassembling and servicing.
1. This section describes procedures for checking the operation of the major printed circuit boards and replacing the
main components.
2. For assembly after operation checks or replacement, reverse the respective procedures.
Special reassembly procedures are described only when required.
3. Select items from the following index when checks or replacement are required.
· Removal of the Main P.C.B. and Power Supply P.C.B.
· Removal of the Control P.C.B.
· Removal of the Operation P.C.B.
· Checking of the P.C.B.
· Removal of the Speaker
· Removal of the LCD
· Removal of the Giro Case
2.1. Removal of the Main P.C.B.
and Power Supply P.C.B.
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RF-U700EG
2.2. Removal of the Control P.C.B.
· Follow the (Step1)-(Step4) of Item 2.1.
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RF-U700EG
2.4. Checking of the P.C.B.
· Follow the (Step1)-(Step9) of Item 2.1.
· Follow the (Step1)-(Step6) of Item 2.2.
· Follow the (Step1)-(Step3) of Item 2.3.
2.3. Removal of the Operation
P.C.B.
· Follow the (Step1)-(Step4) of Item 2.1.
· Follow the (Step1)-(Step3) of Item 2.2.
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RF-U700EG
2.5. Removal of the Speaker
· Follow the (Step1)-(Step4) of Item 2.1.
· Follow the (Step1)-(Step3) of Item 2.2.
2.6. Remove of the LCD
· Follow the (Step1)-(Step4) of Item 2.1.
· Follow the (Step1)-(Step6) of Item 2.2.
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RF-U700EG
2.7. Removal of the Giro Case
6
3 Schematic Diagram
3.1. Schmatic Diagram Notes
(This schematic diagram may be modified at any time with
development of new technology.)
· S701 : POWER switch.
· S702 : VOLUME switch.
· S703 : TUNING switch.
· S704 : AUTO(FM/MONO) switch.
· S705 : MODE switch.
· S706 : PRESET switch.
· S707 : FEVORITE STATIONS 3 switch.
· S708 : FEVORITE STATIONS 2 switch.
· S709 : FEVORITE STATIONS 1 switch.
· S710 : BAND switch.
· S711 : EQ switch.
· S712 : LIGHT (RDS DISP) switch.
· S713 : SLEEP switch.
· S901 : AC/DC select switch in “AC” position.
· The voltage value and waveforms are the reference voltage
of this unit measured by DC electronic voltmeter (high
impedance) and oscilloscope on the basis of chassis.
Accordingly, there may arise some error in voltage values
and waveforms depending upon the internal impeda nce of
the tester or the measuring unit.
· No mark.....FM, ( ).....AM
· Battery Curent
Vol min. (50Hz): FM;100mA/145mA(Backlight
off/Backlight on)
AM;95/135mA (Backlight off/Bac klight
on)
102mA (AM)
Vol max. (50Hz): FM;250mA/295mA (Backlight
off/Backlight on)
AM;170mA/215mA (Backlight
off/Backlight on)
· Measurement instruction
FM: 60dB, 30% Mod.
AM: 74dB/m, 30% Mod.
· Signal lines
RF-U700EG
retardant (resistors), high-quality sound (capacitors), lownoise (resistors), etc. are used. When replacing any of
components, be sure to use only manufacture´s specified
parts shownintheparts list.
Caution!
· IC and LSI are sensitive to static electricity.
· Secondary trouble can be prevented by taking care
during repair.
· Cover the parts boxes made of plastics with
aluminum foil.
· Ground the soldering iron.
· Put a conductive mat on the work table.
· Do not touch the legs of IC or LSI with the fingers
directly.
Important safety notice:
Components identified by
characteristics important for safety.
Furthermore, special parts which have purpose of fire-
mark have special
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RF-U700EG
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