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STEREO RECEIVER

RX-397 SERVICE MANUAL


IMPORTANT NOTICE
This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.
It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already
known and understood by the users, and have therefore not been restated.
WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personal
injury, destruction of expensive components, and failure of the product to perform as specified. For these reasons,
we advise all YAMAHA product owners that any service required should be performed by an authorized YAMAHA
Retailer or the appointed service representative.
IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization, certification or
recognition of any applicable technical capabilities, or establish a principle-agent relationship of any form.
The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and service
departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore, inevitable and
specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the
distributor's Service Division.
WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may have
accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss).
IMPORTANT: Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit.




s CONTENTS


DPX-1200
TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . . . . 2 AMP ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . 16

RX-397
IMPEDANCE SELECTOR . . . . . . . . . . . . . . . . . . . . . . 3 IC DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17­18
FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 DISPLAY DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
REAR PANELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4­5 PIN CONNECTION DIAGRAM . . . . . . . . . . . . . . . . . 20
REMOTE CONTROL PANEL . . . . . . . . . . . . . . . . . . . 5 PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . . 21­27
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 6­7 BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
INTERNAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . 29­31
DISASSEMBLY PROCEDURES . . . . . . . . . . . . . . . . . 8 REMOTE CONTROL RAX16 . . . . . . . . . . . . . . . . . . 33
SELF DIAGNOSIS FUNCTION . . . . . . . . . . . . . . . 9­15 PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34­42




© 2005 YAMAHA CORPORATION. All rights reseved.
100978 This manual is copyrighted by YAMAHA and may not be copied or
redistributed either in print or electronically without permission.

'05.11
RX-397




s TO SERVICE PERSONNEL
AC LEAKAGE
1. Critical Components Information WALL EQUIPMENT TESTER OR
Components having special characteristics are marked Z OUTLET UNDER TEST EQUIVALENT
and must be replaced with parts having specifications equal
to those originally installed.

2. Leakage Current Measurement (For 120V Models Only)
When service has been completed, it is imperative to verify
that all exposed conductive surfaces are properly insulated INSULATING
from supply circuits. TABLE

q Meter impedance should be equivalent to 1500 ohms shunted q Leakage current must not exceed 0.5mA.
by 0.15µF.
q Be sure to test for leakage with the AC plug in both
polarities.
"CAUTION"
"F251, F252 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 5A, 125V FUSE."
A V
CAUTION
F251, F252 : REPLACE WITH SAME TYPE 5A, 125V FUSE.
ATTENTION
F251, F252 : UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 5A, 125V.



WARNING: CHEMICAL CONTENT NOTICE!
The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or
plastic (where applicable) components may also contain traces of chemicals found by the California Health and
Welfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR
ANY REASON WHATSOEVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes
or expose eyes to solder/flux vapor!

If you come in contact with solder or components located inside the enclosure of this product, wash your hands
before handling food.


About Lead Free Solder
The P.C.B.s installed in this unit are soldered using the following solder.
RX-397




Among some types of lead free solder currently available, it
Side A SMT REFLOW Process
is recommended to use one of the following types for the
repair work.
· Sn + Ag + Cu (tin + silver + copper)
Solder Dip · Sn + Cu (tin + copper)
Side B · Sn + Zn + Bi (tin + zinc + bismuth)
MI FLOW Process


Caution:
1. As the melting point temperature of the lead free solder is about 30°C to 40°C (50°F to 70°F) higher than that of the lead
solder, be sure to use a soldering iron suitable to each solder.
2. If lead solder must be used, be sure to remove lead free solder from each terminal section of the parts to be replaced and from
the area around it completely before soldering, or make sure that the lead free solder and lead solder melt together fully.


2
RX-397




s IMPEDANCE SELECTOR

WARNING:
Do not change the setting of the IMPEDANCE SELECTOR switch
when the unit power is switched on, as doing so may damage
the unit.




IMPEDANCE SELECTOR




s FRONT PANEL




DPX-1200
RX-397




3
RX-397




s REAR PANELS
w U, C models




w R model




w A model
RX-397




4
RX-397




w G, E models




w L model




s REMOTE CONTROL PANEL
w RAX16



DPX-1200
RX-397




5
RX-397




s SPECIFICATIONS
AUDIO SECTION Usable Sensitivity (IHF)
Minimum RMS Output Power (Power Amp. Section) Mono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 µV (11.2 dBf)
L/R, 20 Hz to 20 kHz, 0.04% THD, 8 ohms . . . . . . . 50 W + 50 W Selectivity
Dynamic Power Per Channel (IHF) at 400 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 dB
8/6/4/2 ohms . . . . . . . . . . . . . . . . . . . . . . . . . . 70/77/89/100 W Signal to Noise Ratio (IHF)
Maximum Power Per Channel (G, E models) Mono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 dB
1 kHz, 0.7 % THD, 4 ohms . . . . . . . . . . . . . . . . . . . . . . . . . 55 W Stereo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 dB
IEC Power (G, E models) Harmonic Distortion (1 kHz)
1 kHz, 0.04% THD, 8 ohms . . . . . . . . . . . . . . . . . . . . . . . . 52 W Mono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2 %
Maximum Power (EIAJ) (R, L moels) Stereo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 %
1 kHz, 10% THD, 8 ohms . . . . . . . . . . . . . . . . . . . . . . . . . . 85 W Stereo Separation (1 kHz) . . . . . . . . . . . . . . . . . . . . . . . . 45 dB
Power Band Width Frequency Response
L/R, 0.08% THD, 22.5 W, 8 ohms . . . . . . . . . . 10 Hz to 50 kHz 20 Hz to 15 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.5/-2.0 dB
Damping Factor Antenna Input . . . . . . . . . . . . . . . . . . . . . . 75 ohms unbalanced
20 Hz to 20 kHz, SPEAKER-A, 8 ohms . . . . . . . . . 150 or more
Input Sensitivity/Input Impedance AM SECTION
PHONO MM . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 mV/47 k-ohms Tuning Range
CD, etc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 mV/47 k-ohms U, C models . . . . . . . . . . . . . . . . . . . . . . . . . . . 530 to 1710 kHz
Maximum Input Signal R, L models . . . . . . . . . . . . . . . . . 530 to 1710/531 to 1611 kHz
PHONO MM, 1kHz, 0.04 % THD . . . . . . . . . . . . . . . . . . 115 mV A, G, E models . . . . . . . . . . . . . . . . . . . . . . . . 531 to 1611 kHz
CD, etc., 1kHz, 0.04 % THD . . . . . . . . . . . . . . . . . . . . . . . 2.2 V Usable Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 µV/m
Output Level/Output Impedance Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loop antenna
REC OUT . . . . . . . . . . . . . . . . . . . . . . . . . . 150 mV/1.2 k-ohms
Headphone Jack Rated Output/Output Impedance
CD, etc. 1 kHz, 150 mV, 8 ohms, 0.04% THD . . . . . . . . . . 0.47 V/330 ohms GENERAL
Frequency Response Power Supply
CD, etc. 20 Hz to 20 kHz . . . . . . . . . . . . . . . . . . . . . . 0 ± 0.5 dB U, C models . . . . . . . . . . . . . . . . . . . . . . . . . . AC 120 V, 60 Hz
CD, etc. PURE DIRECT ON, 10 Hz to 100 kHz . . . . . . . . . . . . 0 ± 1.0 dB R model . . . . . . . . . . . . . AC 110/120/220/230-240 V, 50/60 Hz
RIAA Equalization Deviation A model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 240 V, 50 Hz
PHONO MM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 ± 0.5 dB G, E models . . . . . . . . . . . . . . . . . . . . . . . . . . AC 230 V, 50 Hz
Total Harmonic Distortion (20 Hz to 20 kHz) L model . . . . . . . . . . . . . . . . . . . . AC 220/230-240 V, 50/60 Hz
PHONO MM to REC OUT (3 V) . . . . . . . . . . . . . . . . . 0.02 % or less Power Consumption (reference) . . . . . . . . . . . . . . . . . . 130 W
CD, etc. to SP OUT (35 W/8 ohms) . . . . . . . . . . 0.02 % or less Standby Power Consumption . . . . . . . . . . . . . . . . . . . . . 0.1 W
Signal to Noise Ratio (IHF-A Network) Maximum Power Consumption (R moel)
PHONO MM (Input shorted, 5 mV) . . . . . . . . . . 82 dB or more 1 kHz, 8 ohms, 10% THD . . . . . . . . . . . . . . . . . . . . . . . 300 W
CD, etc. (Input shorted, 150mV) . . . . . . . . . . . 108 dB or more AC Outlet
Residual Noise (IHF-A Network) 2 Switched Outlet
PURE DIRECT ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 µV R model . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 W Max. total
Channel Separation U, C, G, E, L models . . . . . . . . . . . . . . . . . . 100 W Max. total
CD, etc. (Input 5.1 k-ohms shorted) 1 Switched Outlet
1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 dB or more A models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 W Max.
10 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 dB or more Dimensions (W x H x D) . . . . . . . . . . . . . . 435 x 151 x 308 mm
Tone Control Characteristics (17-1/8" x 5-15/16" x 12-1/8")
BASS Boost/Cut (50 Hz) . . . . . . . . . . . . . +10 dB/-10 dB Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.4 kg (16 lbs 5 oz)
Turnover Frequency . . . . . . . . . . . . . . . . . 350 Hz Finish . . . . . . . . . . . . . . Black Color (U, C, R, A, G, E, L models)
RX-397




TREBLE Boost/Cut (20 kHz) . . . . . . . . . . . . +10 dB/-10 dB Titanium Color (G, E, L models)
Turnover Frequency . . . . . . . . . . . . . . . . . 3.5 kHz Accessories . . . . . . . . . . . . . . . . . . . . . . . . Remote Control x 1
Continuous Loudness Control Battery (AAA, R03, UM-4) x 2
Attenuation (1 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30 dB Indoor FM Antenna x 1
Gain Tracking Error AM Loop Antenna x 1
0 to -60 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 dB or less * Specifications subject to change without notice.



FM SECTION U ........ USA model G ........ European model
Tuning Range C ........ Canadian model E ........ South European model
U, C models . . . . . . . . . . . . . . . . . . . . . . . . . 87.5 to 107.9 MHz R ........ General model L ........ Singapore model
R, L models . . . . . . . . . . . . 87.5 to 108.0/87.50 to 108.00 MHz A ........ Australian model
A, G, E models . . . . . . . . . . . . . . . . . . . . . 87.50 to 108.00 MHz
50 dB Quieting Sensitivity (IHF)
1 kHz 100% MOD.
Mono . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 µV (17.3 dBf)
Stereo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 µV (39.2 dBf)

6
RX-397



DIMENSIONS




(7/8")
22.5

308 (12-1/8")
267 (10-1/2")
18.5
(3/4")
130 (5-1/8")

151 (5-15/16")

435 (17-1/8")
21
(13/16")




Unit : mm (inch)




s INTERNAL VIEW
q w
q OPERATION (12) P.C.B. (A, G, E, L models)
w MAIN (4) P.C.B. (R, L models)
e MAIN (2) P.C.B.
e r t y u i o !0 r MAIN (3) P.C.B.
t MAIN (1) P.C.B.
y MAIN (5) P.C.B.
u FUNCTION (4) P.C.B.
i FUNCTION (1) P.C.B.
o FUNCTION (2) P.C.B.
!0 OPERATION (13) P.C.B.
!1 OPERATION (10) P.C.B.


DPX-1200
!2
RX-397
OPERATION (3) P.C.B.
!3 OPERATION (2) P.C.B.
!4 OPERATION (1) P.C.B.
!5 OPERATION (8) P.C.B.
!6 OPERATION (5) P.C.B.
!1 !2 !3
!4 !3 !5 !7 OPERATION (7) P.C.B.
!8 OPERATION (4) P.C.B.
!9 OPERATION (9) P.C.B.




!6 !1 !7 !2 !8 !9
7
RX-397




s DISASSEMBLY PROCEDURES
· Remove parts in disassembly order as numbered.
· Disconnect the power cable from the AC outlet.

1. Removal of Top Cover 4. Removal of Sub Chassis Unit
a. Remove 4 screws ( q ), 1 screw ( w ) and 4 screws ( a. Remove 2 screws ( u ) and then slide the Sub Chassis
e ). (Fig. 1) Unit forward. (Fig. 1)
b. Slide the Top Cover rearward to remove it. (Fig. 1) b. Loosen the harness fixture fixing the cable.
c. Remove connectors CB103, CB401, CB404, CB606
2. Removal of Front Panel Unit
and CB611 and then remove the Sub Chassis Unit.
a. Remove 5 knobs (INPUT, BASS, TREBLE, BALANCE
(Fig. 1)
and LOUDNESS).
b. Remove 1 screw ( r ) and then remove the Support
Top. (Fig. 1)
c. Remove 7 screws ( t ) and then remove the Front
Panel Unit. (Fig. 1)

3. Removal of Plate Side
Remove 2 push rivets ( y ) and then remove the Plate
Side L/R. (Fig. 1)




Top Cover


q
e
w
Sub Chassis Unit


Front Panel Unit CB401
CB404
t u
r
CB103
q
Support Top

Knob
y CB606

u
t
RX-397




Plate Side L
Knob



CB611
y
Plate Side R
Fig. 1




8
RX-397




s SELF DIAGNOSIS FUNCTION

This product has a built-in self diagnosis function (DIAG) to facilitate inspection, measurement and determination of a faulty
item, if any. There are 8 DIAG menu items, each having sub-menu items.

No. DIAG menu Sub-menu
1 DISPLAY CHECK 1. VFD CHECK (Initial display
2. VFD DISP OFF (All segments OFF)
3. VFD DISP ALL (All segments ON 100%)
4. VFD DIMMER (All segments ON 50%)
5. CHECKED PATTERN (ON in lattice)
2 FACTORY PRESET 1. PRESET INHI (memory initialization inhibited
2. PRESET RSRV (memory initialized
3 AD DATA CHECK 1. DC/PS (protection)
2. THM L, R
3. REC-OUT (No applied to this model
4. K0 / K1 (panel key)
4 XM STATUS 1. XMS1 (No applied to this model
2. XMS2 (No applied to this model
5 PROTECTION SETTING 1. PS_Lo :
2. PS_Hi :
3. DC_Lo :
4. DC_Hi :
5. TEMP :
6 PROTECTION HISTORY 1. history 1
2. history 2
3. history 3
4. history 4
7 SOFT SWITCH 1. SW MODE : PCB (/MODEL/FNC)
2. MODEL SETTING : RX397 (/RX797/RX497)
3. DESTINATION : UC (/RL/A/BG)
4. TUNER DESTINATION : (/RL/ABG)
5. TUNER TYPE : NRM (/RDS/XM)
6. ZONE2 : EXIST (/NOT) (No applied to this model
8 MICROPROCESSOR INFORMATION 1. VERSION
2. CHECK SUM
3. OPE / XM
4. PORT
5. EE SUM




DPX-1200
RX-397




9
RX-397



q Starting DIAG q Display provided when DIAG started
Press the "STANDBY/ON" key of the main unit while simul- On the FL display of the main unit, an opening mes-
taneously pressing the "FM/AM" key and the "8" key to acti- sage (including the version and the protection history)
vate the DIAG function. appears for a few seconds followed by the diagnostic
menu display (1. VFD CHECK).




When there is no history of protection function:

Opening message

When there is no protection history.



Turn on the power while pressing these keys. NO PROTECT Z

Version (1 alphabet)
q Starting DIAG in the protection cancel
mode
After a few seconds.
If the protection function works and causing hindrance to
trouble diagnosis, cancel the protection function as de-
scribed below and it will be possible to enter the DIAG mode. DIAG menu display
(The protection functions other than the excess current
1. VFD CHECK
detect function will be disabled.)
Press the "STANDBY/ON" key while simultaneously press-
ing those two keys indicated in the figure above. At this
time, keep pressing those two keys for 3 seconds or longer. When there is a history of protection function:
In this mode, the "SLEEP" segment of the FL display of the The FL display appears as shown below depending on the
main unit flashes to indicate that the mode is DIAG mode type of the protection function.
with the protection functions disabled.
The protection function worked due to excessive current
CAUTION! through the amplifier. The protection function activates im-
Using this product with the protection function disabled mediately to turn off the power, with no history display at
may cause damage to itself. Use special care for this point turn-on, if the amplifier is defective.
when using this mode.

I PROTECT Z
q Canceling DIAG
RX-397




1 Before canceling DIAG, execute setting for PRESET of The protection function worked due to a defect or overload
DIAG menu No.2 (Memory initialization inhibited or in the power supply. The abnormal voltage is displayed in
Memory initialized). % based on 5V as 100%. If the power is turned on with the
* In order to keep the user memory stored, be sure to se- abnormality unsolved, the protection function works in about
lect PRESET INHIBITED (Memory initialization inhibited). 1 second to turn off the power.
Protection history will remain in memory.
2 Turn off the power by pressing the "STANDBY/ON" key
of the main unit. PS PRT :000 Z




10
RX-397



The protection function worked due to a DC voltage ap- q Operation procedure of DIAG MENU and
pearing at the speaker terminal. SUB-MENU
A cause could be a defect in the amplifier. If the power is There are 8 MENU items, each of which has some SUB-
turned on with the abnormality unsolved, the protection func- MENU items.
tion works in about 3 seconds to turn off the power.
DIAG menu selection
Select the menu using PRESET NO keys.
DC PRT :000 Z



The protection function worked due to the temperature limit
being exceeded. Causes could be poor ventillation or a de-
fect related to the thermal sensor. The abnormal voltage is
displayed in % based on 5V as 500%. If the power is turned
on with the abnormality unsolved, the protection function SUB-MENU selection
works in about 1 second to turn off the power. Select the sub-menu using w (Forward) and q (Reverse)
keys of TUNING.
TMR PRT:000 Z


For detection of each protection function (except I-PRO-
TECT) , refer to DIAG MENU No.3 AD DATA CHECK (p.13). Reverse Forward


q History of protection function
When the protection function has worked, its history is stored
in memory with a backup. Even if no abnormality is noted while q Functions in DIAG mode
servicing the unit, an abnormality which has occurred previ- In addition to the DIAG menu items, functions as listed
ously can be defined as long as the backup data has been below are available.
stored. · Input selection
The history of the protection function is cleared when DIAG is
· Muting
cancelled by selecting PRESET RESERVED (Memory initial-
· Power on/off
ized) of DIAG menu No.2 or when the backup data is erased.
· Master volume

* Functions related to the tuner is not available.


q Display during menu operation
During the DIAG operation, the function at work is indi- q Initial settings used to start DIAG
cated on the FL indicator. The contents displayed dur- The following initial settings are used when starting



DPX-1200
ing the function operation are described later in the "De- DIAG. When DIAG is canceled, these settings are re-

RX-397
tails of DIAG menu" section. stored to those before starting DIAG.

· Input: DVD
· Audio mute: OFF
· DIAG menu: DISPLAY CHECK (1. VFD CHECK)




11
RX-397




1. DISPLAY CHECK 2. FACTORY PRESET
This program is used to check the FL display section. The This menu is used to reserve/inhibit initialization of the back-
display condition varies as shown below according to the up RAM.
sub-menu operation.


Initial display
2.PRESET INHI
PRESET INHIBIT (Initialization inhibited)
RAM initialization is not executed. Select this sub-
menu to protect the values set by the user.
All segments OFF Note: The protection history will not be erased using
PRESET INHIBIT.




All segments ON 2.PRESET RSRV
(dimmer 100%)
PRESET RESERVED (Initialization reserved)
Initialization of the back-up RAM is reserved. (Actu-
ally, initialization is executed the next time that the
All segments ON power is turned on.) Select this sub-menu to reset
(dimmer 50%) to the original factory settings or to reset the RAM.
Use PRESET RESERVED to erase the protection
history.

Lighting of segments
in lattice

CAUTION: Before setting to the PRESET RESERVED, write down
the existing preset memory
content of the Tuner in a table as shown below. (This is be-
cause setting to the PRESET RESERVED will cause ALL user
memory contents to be erased.)


Lighting in lattice Preset group P1 P2 P3 P4
A
B
C
Short Normal D
E
RX-397




Preset group P5 P6 P7 P8
A
B
C
D
E
Segment conditions of the FL driver and the FL tube are
checked by turning ON and OFF all segments. Next, the
operation of the FL driver is checked by using the dimmer
control. Then a short between segments next to each other
is checked by turning ON and OFF all segments alternately
(in lattice). (In the above example, the segments in the sec-
ond row from the top are shorted.)



12
RX-397



q PRESET STATIONS THM (temperature detection)
STATION FM FACTORY PRESET DATA (MHz) When the value is outside of the normal range, the protec-
PAGE NO. U, C R, A, G, E, L tion function works to turn off the power.
1 87.5 87.50 500% display of the voltage based on the temperature de-
2 90.1 90.10
tected value. Reference voltage: 5V
3 95.1 95.10
* For RX-397, only R ch is effective.
A/C/E 4 98.1 98.10
5 107.9 108.00
6 88.1 88.10
7 106.1 106.10
THM:L000 R098
8 107.9 108.00

STATION AM FACTORY PRESET DATA (kHz)
PAGE NO. U, C, R A, G, E, L REC-OUT
1 630 630 Not applied to this model.
2 1080 1080
3 1440 1440
B/D 4 530 531 REC-OUT:225
5 1710 1611
6 900 900
7 1350 1350
8 1400 1404 K0/K1
This is the A/D value of the panel key input ports KEY0 and
KEY1 (microprocessor). The table below shows the A/D
value obtained when each key is pressed. When the value
3. AD DATA CHECK
is not within the standard value range, no correct operation
With this sub-menu used, the key scanning, A/D value of
is provided. Referring to the table below, check the value of
the voltage at the abnormality detect (protection) port, etc.
each voltage dividing resistor of each key, solder condition,
are displayed. The A/D conversion value is displayed in %.
etc.
The state before audio signal processing is kept.
When K0/K1 menu is selected, keys become nonoperable
K0:100 K1:099
due to detection of the values of all keys.
However, it is possible to advance to the next sub-menu by
% Key0 Key1
turning the INPUT of the main unit. When using this func-
1 0­4 FM/AM P8
tion, note that turning the INPUT more than 2 clicks will
2 4 ­ 12 TUNING DOWN P7
cause the volume value to change. 3 12 ­ 21 TUNING UP P6
* The numeric value in the diagram is for reference. 4 21 ­ 30 TUNING MODE P5
5 31 ­ 41 MEMORY P4
DC/PS (protection detection) 6 42 ­ 52 EDIT P3
DC: DC detect protection value 7 52 ­ 61 P2
Normal value: 19 to 51 (Reference: 5V = 100%) 8 61 ­ 68 SPEAKER B P1
PS: Power supply voltageprotection value 9 68 ­ 74 SPEAKER A A/B/C/D/E
10 75 ­ 81
Normal value: 28 to 62 (Reference: 5V = 100%)


DPX-1200
11 81 ­ 89


When the value is outside of the normal range, the pro- RX-397
tection function works to turn off the power.

4. XM STATUS
Not applied to this model.
DC:035 PS:035
4. XMS1xxxxxxx



4. XMS2xxxxxxx


13
RX-397




5. PROTECTION SETTING 6. PROTECTION HISTORY
This menu is used to change the protection setting value. Four protection histories are display.
The change is effective in this menu only. A set value can The history is cleared by the initialization reservation of DIAG
be specified between 0 ­ 255 (0V ­ 5V). menu No. 2.


Operation: When there is no history of protection function:
Change the digit with the "EDIT" key. There is no history of protection function.
UP / DOWN with the TUNING MODE / MEMORY key.
6-1 NoPRT


PS_Lo: 0138 When there is a history of protection function:
There is a history of protection function due to excess cur-
The PS protection LO level threshold value can be set. rent.
Protection operates when the voltage value of the de-
tection terminal falls below this value. 6-1 I PRT


There is a history of protection function due to abnormal
PS_Hi: 0215 voltage in the power supply section.
The PS protection HI level threshold value can be set. The abnormal voltage is displayed in % based on 5V as
Protection operates when the voltage value of the de- 100%.
tection terminal exceeds this value.
6-2 PsPRT 069


DC_Lo: 0049 There is a history of protection function due to abnormal
DC output.
The DC protection LO level threshold value can be set. The abnormal voltage is displayed in % based on 5V as
Protection operates when the voltage value of the de- 100%.
tection terminal falls below this value.
6-3 DcPRT 059

DC_Hi: 0131
There is a history of protection function excessive heatsink
The DC protection HI level threshold value can be set. temperature. (R ch)
Protection operates when the voltage value of the de- The abnormal voltage is displayed in % based on 5V as
tection terminal exceeds this value. 500%.

6-4 TmRPRT 245
RX-397




TEMP : 0089
There is a history of protection function excessive heatsink
The TEMP protection HI level threshold value can be temperature. (L ch)
set. Not applied to this model.
Protection operates when the voltage value of the de-
tection terminal exceeds this value.
6-4 TmLPRT 245

* The numeric value in the diagram is for reference.




14
RX-397




7. SOFT SWITCH 8. MICROPROCESSOR INFORMATION
The version, checksum and the port specified by the
Note) Changing the function setting may hinder the proper
microprocessor are displayed. The checksum is obtained
operation.
by adding the data at every 16 bits for each program
This menu is used to switch the function settings on P.C.B. area and expressing the result as a 4-figure hexadecimal
through the software so as to activate the product. data.
The operation mode can be changed by selecting the sub- * The numeric value in the diagram is for reference.
menu and then using the EDIT key.
The protection function follows the P.C.B. settings.
When connected to AC, the unit is initialized to the P.C.B.
setting. Display of each function after initialization varies
VER. Z009
depending on settings on P.C.B.
Software version of microprocessor

SW MODE: PCB, MODEL or FNC can be selected.
CHECK SUM:78E2
7.SW :PCB Checksum value of microprocessor


MODEL SETTING: RX797, RX497 or RX397 can be se- OPE:06 XM:AB
lected. (SW MODE: Selectable when MODEL has been se- Software modules version of microprocessor
lected.)

7.MODEL :RX397 PORT:
The condition of ports for model detection
DESTINATION: UC / RL / A or BGE can be selected. (SW
(Not applied to this model.)
MODE: Selectable when MODEL has been selected.)


7.DEST :UC
EE SUM:0000
TUNER DEST INATION: UC, RL or ABGE can be selected. Checksum value of EEPROM
(SW MODE: Selectable when FNC has been selected.)

7.TuDst :UC

TUNER TYPE: NRM, RDS or XM can be selected. (SW
MODE: Selectable when FNC has been selected.)

7.TuTyp :NRM


DPX-1200
RX-397
ZONE2: NOT or EXIST can be selected. (SW MODE: Se-
lectable when FNC has been selected.)

7.ZONE2 :NOT



Frequency Range
Tuner Dest Comment
FM AM
UC 87.5­107.9MHz/200kHz 530­1710kHz/10kHz
87.5­108.0MHz/50kHz 531­1611kHz/9kHz The frequency range is selected
RL
87.5­108.0MHz/100kHz 530­1710kHz/10kHz with Advanced Set Up
ABG 87.5­108.0MHz/50kHz 531­1611kHz/9kHz




15
RX-397




s AMP ADJUSTMENT

q CONFIRMATION OF IDLING CURRENT
1. Right after the power is turned on, confirm that the volt-
age across the terminals of R137 (L ch) and R138 (R ch)
are between 0.1mV to 10.0mV.
2. If the measured voltage exceeds 10.0mV, open (cut off)
R131 (L ch), R132 (R ch) and reconfirm the voltage.
3. Confirm that the voltage is between 0.20mV and 15.0mV
after 60 minutes.




R137 (L ch) Cut
R138 (R ch)




0.1mV­10mV R131 (L ch)
R132 (R ch)




R137

R131




R138
RX-397




R132




16
RX-397




s IC DATA
IC602 : M30626FHPFP (FUNCTION (2) P.C.B.)
16-bit Microprocessor




P21/A1/(/D1/D0)
P22/A2/(/D2/D1)
P23/A3/(/D3/D2)
P24/A4/(/D4/D3)
P25/A5/(/D5/D4)
P26/A6/(/D6/D5)
P27/A7/(/D7/D6)
P20/A0/(/D0/--)




P30/A8(/--/D7)
P15/D13/INT3
P16/D14/INT4
P17/D15/INT5
P12/D10

P14/D12




P32/A10

P34/A12
P35/A13
P36/A14
P37/A15
P40/A16
P41/A17
P42/A18
P43/A19
P13/D11




P33/A11
P10/D8




P31/A9
P11/D9




VCC
VSS
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
P07/D7 81 50 P44/CS0
P06/D6 82 49 P45/CS1
P05/D5 83 48 P46/CS2
P04/D4 84 47 P47/CS3
P03/D3 85 46 P50/WRL/WR
P02/D2 86 45 P51/WRH/BHE
P01/D1 87 44 P52/RD
P00/D0 88 43 P53/BCLK
P107/AN7/K13 89 42 P54/HLDA
P106/AN6/K12 90 41 P55/HOLD
P105/AN5/K11 91 40 P56/ALE
P104/AN4/K10 92 39 P57/RDY/CLKOUT
P103/AN3 93 38 P60/CTS0/RTS0
P102/AN2 94 37 P61/CLK0
P101/AN1 95 36 P62/RXD0
AVSS 96 35 P63/TXD0
P100/AN0 97 34 P64/CTS1/RTS1/CTS0/CLKS1
VREF 98 33 P65/CLK1
AVCC 99 32 P66/RXD1
P97/ADTRG/SIN4 100 31 P67/TXD1
10

12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
11
1
2
3
4
5
6
7
8
9
P96/ANEX1/SOUT4
P95/ANEX0/CLK4
P94/DA1/TB4IN
P93/DA0/TB3IN
P92/TB2IN/SOUT3
P91/TB1IN/SIN3
P90/TB0IN/CLK3
BYTE
CNVSS
P87/XCIN
P86/XCOUT
RESET
XOUT
VSS
XIN
VCC
P85/NMI
P84/INT2
P83/INT1
P82/INT0
P81/TA4IN/U
P80/TA4OUT/U
P77/TA3IN
P76/TA3OUT
P75/TA2IN/W
P74/TA2OUT/W
P73/CTS2/RTS2/TA1IN/V
P72/CLK2/TA1OUT/V
P71/RXD2/TA0IN/TB5IN
P70/TXD2/TA0OUT
No. Port Name I/O Function
1 P96/ANEX1 DTFD O FL Driver Tx DATA
2 P95/ANEX0 CKFD O FL Driver CLOCK
3 P94 O
4 P93 DEST1 I Model Distinction 1
5 P92/TB2in DEST0 I Model Distinction 0
6 P91/TB1in MOD1 I Destination Distinction 1 (Reserve)
7 P90/TB0in MOD0 I Destination Distinction 0 (Reserve)
8 BYTE BYTE MCU Vss: when single chip mode is used (Gnd)
9 CNVss CNVss MCU Vss: when single chip mode is used, Vcc: when flash writing is used (PullDown)
10 P87/Xcin /CEEEP O EEPROM CE
11 P86/Xcout N.C. O
12 /RESET /RESET MCU Reset
13 Xout