Panasonic RC-700E Manuale utente

ORDERNO. AD0304087C8

Clock Radio

RC-700E / RC-700EB / RC-700EJ/ RC-700GN

Colour

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

SPECIFICATIONS

Specification

Radiofrequencyrange:

FM; 87.50-108.00 MHz

AM; 520-1610 kHz

Intermediatefrequency:

FM; 10.7MHz

AM; 459.0kHz

Sensitivity:

FM; 5.62 V/50mWoutput (-3dB

limit sens.)

AM; 100 V/m/50mWoutput (Max

sens.)

Power requirement:

AC; 230 V, 50 Hz / Power

consumption; 6W

Battery; 9V (one6F22/6LR61, 006P

battery)

Power output: 250 mW+250 mW(RMS...max.)

Speaker; 4cm

Dimensions(W×H×D): 215×64×149 mm

Mass (without battery): 804g

Note: / Specificationsare subject tochangewithout notice. /

Mass and dimensionsare approximate.

[Power consumption instandbymode: 1.8W]

Unauthorized copying and distribution isaviolation of law.

1. Caution for AC Mains Lead

2. Operation Checks and Component Replacement

Procedures

-Thissection describes procedures for checking the operation of

the major printed circuitboards and replacing the main

components.

-For reassemblyafter operation checks or replacement, reverse the

respective procedures. Special reassemblyprocedures are

described onlywhen required.

2.1. Checking for the mainP.C.B. ass’y

2.2. Replacement for the mainP.C.B.

-Follow the (Step1)-(Step5) of item 2.1.

2.3. Replacement for the speakers.

-Follow the (Step1)-(Step3) of item 2.1.

3. Schematic Diagram

3.1. SchematicDiagram Notes

S1:

DOZE switch.

S2:

SLEEP switch.

S3:

HOUR switch.

S4:

MINswitch.

S5:

ALARMswitch.

S6:

TIME SET switch.

S11:

BAND switch in“AM” position.

AL1-1, AL1-2:

RADIO/BUZZER, ALARM, OFF, RADIO/OFF select switch in

“RADIO/OFF” position.

VR1:

Batteryback-up VR.

VR2-1, VR2-2:

Volume control VR.

-DC voltage measurements are taken with electronics voltmeter.

The negative terminal of the batteryprovides negative meter

connection point.

Nomark.........

().....................

-Batterycurrent:

Vol. min................

FM: 15mA

AM: 15mA

Vol. max...............

FM: 36mA

AM: 29mA

Measurement instruction

AM:

74dB/m, 30%Mod.

FM:

60dB, 30%Mod.

-Important safetynotice

Components identified bymark have special characteristics

importan for safety. / When replacing anyof these components,

use onlymanufacturer’sspecified parts.

-Thisshematicdiagram maybe modified at anytime with the

development of new technology.

3.2. SchematicDiagram

4. Printed Circuit Diagram

5. Type Illustration of IC’s, Transistors and Diodes

6. Measurement and Adjustment

6.1. ALIGNMENTINSTRUCTIONS

READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT

1. Set power source voltageto 230V/50Hz AC.

2. Set volumecontrol to maximum.

3. Set band switch to AMor FM.

4. Outputofsignal generator should beno higher than necessaryto obtain an outputreading.

-AM-IFALIGNMENT

Signal GeneratororSweep

Generator RadioDial Setting Indicator

(Electronic

Voltmeteror

oscilloscope)

Adjustment

(Shownin Fig.1 )

Remarks

Connections Frequency

Fashion a loop of

several turns of

wire and radiate

signal intoloop of

receiver.

459 kHz 30%

Mod. at 400 Hz Point of non-

interference. (on/

about 600 kHz)

Connect vert.

amp. of scope to

test point TP3.

Negative side to

test point TP4.

T3 (AM IFT)

Adjust

maximum

output.

-AM-RFALIGNMENT

Signal GeneratororSweepGenerator RadioDial

Setting Indicator

(Electronic

Voltmeteror

oscilloscope)

Adjustment

(Shownin Fig.1 )

Remarks

Connections Frequency

Fashion a loop of

several turns of

wire and radiate

signal intoloop of

receiver.

511 kHz Variable

capacitorfully

closed.

Connect vert.

amp. of scope to

test point TP3.

Negative side to

test point TP4.

L10 (AM OSC

Coil)

Adjust

maximum

output.

Fashion a loop of

several turns of

wire and radiate

signal intoloop of

receiver.

1650 kHz Variable

capacitorfully

opened.

Connect vert.

amp. of scope to

test point TP3.

Negative side to

test point TP4.

CT1-3 (AM OSC

Trimmer)

Adjust

maximum

output.

Fashion a loop of

several turns of

wire and radiate

signal intoloop of

receiver.

600 kHz Tune tosignal Connect vert.

amp. of scope to

test point TP3.

Negative side to

test point TP4.

[*1] L5 (AM ANT

Coil)

Adjust

maximum

output.

moving

along

ferrite

Fashion a loop of

several turns of

wire and radiate

signal intoloop of

receiver.

1500 kHz Tune tosignal Connect vert.

amp. of scope to

test point TP3.

Negative side to

test point TP4.

CT1-4 (AM ANT

Trimmer)

Adjust

maximum

output.

[*1] Fix antenna coil withwax aftercompleting alignment

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