Changing The Reception Area; Troubleshooting - Clarion ARX850z Service Manual

CHANGING THE RECEPTION AREA

■
This unit is initially set to USA frequency intervals of 10kHz
for AM and 200kHz for FM.When using it outside the
USA,the frequency reception range can be switched to the
intervals below.
Setting the reception area
1. Press BND button and select the desired radio band(FM
or AM).

TROUBLESHOOTING

■
Problem
Nothing happens when
buttons are pressed.
Display is not accurate.
■ ADJUSTMENT
Item Procedure
Dolby level
1. Playback a Dolby level test tape(400Hz,200nWb/m) and connect the Milli-volt
meter to TP101(L)/TP102(R).
2. Adjust VR101(L)/VR102(R) to obtain an output of TP101(L)/TP102(R) is 388mV
±
Azimuth
1. Playback a azimuth test tape(10kHz,
adjustment
screw to make each FOW & REV Maximum.
2. After adjustment,make adhesion with bond.
Tape speed
1. Playback a Wow & flutter test tape(3kHz,
counter to TP101(L) or TP102(R).
2. Adjust Speed VR of the motor to obtain an output of TP101(L),TP102(R) is
3000Hz
EXPLANATION OF IC
■
■ M30622M8-189GP 052-3344-00 Tuner/Cassette Controller
1. Outward Form : 100 pins QFP
2. Function : GFC-3C cassette mechanism control, PLL IC control, Elec-
tric volume IC control, Ce-NET
3. Terminal Description
pin 1 : N.C. : IN : Not in use.
pin 2 : N.C. : O : Not in use.
pin 3 : APC SENSE : O : "L"= Play, "H"= FF/REW
pin 4 : N.C. : IN : Not in use.
pin 5 : TIME BASE : IN : Time base signal input terminal.
pin 6 : BYTE : IN : Connect to ground.
pin 7 : CNVSS : IN : Connect to ground.
pin 8 : N.C. : IN : Not in use.
pin 9 : N.C. : O : Not in use.
pin 10 : RESET_ : IN : Reset signal input. Negative logic.
pin 11 : X OUT : O : Crystal connection.
pin 12 : VSS : - : Ground.
pin 13 : X IN : IN : Crystal connection.
pin 14 : VCC : - : Positive supply voltage.
pin 15 : N.C. : IN : Not in use.
pin 16 : ACC DET : IN : ACC ON signal input.
pin 17 : B/U DET_ : IN : "L"= Backup OFF
pin 18 : KEY INT_ : IN : Interrupt signal input of FUNC/EJECT key
pin 19 : 27pinCONNECT: IN : Connect to pin 27.
pin 20 : N.C. : IN : Not in use.
pin 21 : N.C. : IN : Not in use.
pin 22 : N.C. : O : Not in use.
pin 23 : DISP RESET : O : Display IC reset signal output.
Cause
The microprocessor has malfunctioned
due to noise,etc.
1dB.(Dolby SW:off)
± 45Hz.
(Ce-NET)
and DCP take off switch.
2. While pressing RDM button,each time you press and
hold the number "1" of the Preset buttons for 2 seconds
or longer,the reception area switches from inside the
USA to outside the USA or from outside the USA to
inside the USA.
*Any station preset memories are lost when the recep-
tion area is changed.
Solution
Turn off the power,then press the OPEN button and
remove the DCP.
Press the reset button for about 2 seconds with a
thin rod.
− 10VU) and turn each azimuth-adjusting
− 10VU) and connect the frequency
pin 24 : PULSE DIMM
pin 25 : N.C.
pin 26 : N.C.
pin 27 : IE BUS RX
pin 28 : IE BUS TX
pin 29 : N.C.
pin 30 : N.C.
pin 31 : INITIAL OUT
pin 32 : PLL CE
pin 33 : PLL DO
pin 34 : PLL DI
pin 35 : PLL SCK
pin 36 : FM STEREO
pin 37 : NON FADER 1 : O : Non fader volume control signal output.
pin 38 : NON FADER 2 : O : Non fader volume control signal output.
pin 39 : NON FADER 3 : O : Non fader volume control signal output.
pin 40 : INITIAL 1
pin 41 : INITIAL 2
pin 42 : VOLUME CLK : O : Serial clock output to Electric volume.
pin 43 : VOLUME DO
pin 44 : TONE BYPS_
pin 45 : N.C.
pin 46 : DOLBY ON_
pin 47 : DOLBY B/C
pin 48 : POWER M 1
pin 49 : POWER M 2
pin 50 : FWD/REV
pin 51 : N.C.
- 3 -
R e s e t b u t t o n
Measuring
instrument
Dolby test tape
Milli-volt meter
Azimuth test tape
Milli-volt meter
Wow & flutter test
tape
Frequency counter
: O : Pulse dimmer / Back light LED ON signal
output.
: IN : Not in use.
: O : Not in use.
: IN : IE Bus communication line.
: O : IE Bus communication line.
: O : Not in use.
: IN : Not in use.
: O : Memory clear signal output to EEPROM.
: O : PLL chip enable signal output.
: O : PLL serial data output.
: IN : PLL serial data input.
: O : PLL serial clock output.
: IN : FM stereo detection signal input.
Ref. Table 1.
Ref. Table 1.
Ref. Table 1.
: IN : Destination setting terminal. Ref. Table 2.
: IN : Destination setting terminal. Ref. Table 2.
: O : Serial data output to Electric volume.
: O : Tone bypass ON signal output. Negative
logic.
: O : Not in use.
: O : Dolby ON signal output. Negative logic.
: O : "L"= Dolby C, "H"=Dolby B.
: O : Power motor control signal output.
Ref. Table 3.
: O : Power motor control signal output.
Ref. Table 3.
: O : "L"= FWD, "H"= REV.
: O : Not in use.
ARX8570z