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Model
HT-DDW7500 HT-DDW8500 STR-KM7500
Pages
80
Size
6.95 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
ht-ddw7500-ht-ddw8500-str-km7500.pdf
Date

Sony HT-DDW7500 / HT-DDW8500 / STR-KM7500 Service Manual ▷ View online

STR-KM7500
7
SECTION  3
TEST  MODE
TUNER  AM  STEP  CHANGE (9  kHz/10  kHz)  MODE
The AM tuning interval can be changed over 9 kHz or 10 kHz.
Procedure:
1.  Press the [
?/1
] button to turn on the main power. 
2.  Press TUNER repeatedly to select AM. 
3. Press 
AMP 
MENU.
 
“1-LEVEL” appears on the display.
4. Press 
V/v repeatedly to select “4-TUNER”.
5. Press
 
 
or 
b to enter the menu.
6. Press 
V/v repeatedly to select “AM STEP”.       
7. Press
 
 
or 
b to enter the parameter.
8. Press 
V/v repeatedly to select the AM tuning scale you want.
FL  CHECK  MODE
All fl uorescent segments are tested. When this test is activated, all 
segments turn on at the same time, then each segment turns on one 
after another.
Procedure:
1.  When pressing the [MULTI STEREO] and [A.F.D.] buttons, 
press the [
?/1
] button to turn on the main power. 
2.  All segments and [MULTI STEREO] and [NIGHT MODE] 
LED turn on.
3.  Turn the [INPUT SELECTOR] dial. 
4.  Test pattern 1 turn on, [MULTI STEREO] LED turn on and 
[NIGHT MODE] LED turn off.
5.  Turn the [INPUT SELECTOR] dial once again. 
6.  Test pattern 2 and [MULTI STEREO] LED turn off and 
[NIGHT MODE] LED turn on .
7.  Turn the [INPUT SELECTOR] dial once again. All segments 
and LED turn off. 
8.  Every turning of the [INPUT SELECTOR] dial turns on each 
segment one after another on the same order.
S.F.  CLEAR  MODE
The preset sound fi led is cleared when this mode is activated. Use 
this mode before returning the product to clients upon completion 
of repair.
Procedure:
1.  While pressing the [A.F.D.] button, press the [
?/1
] button to 
turn on the main power. 
2.  The message “S.F. CLR.” appears and initialization is per-
formed. 
VERSION  CHECK  MODE
When this mode is used the model, the destination and the software 
version number are displayed.
Procedure:
1.  While pressing the [NIGHT MODE] and [GAME] buttons, press 
the [
?/1
] button to turn on the main power. 
2.  The model, the distination and the software version number 
appear. 
KEY  CHECK  MODE
This mode is used to check the key.
Procedure:
1.  While pressing the [MUSIC] and [MOVIE] buttons, press the 
[
?/1
] button to turn on the main power. 
2.  The message “REST 06” appears.
3.  Every pressing of any button other than the [
?/1
] button counts 
down the buttons. The buttons which are already counted once 
are not counted again.
4.  When all buttons are pressed, the message “REST 00” ap-
pears.
SWAP  ALL MODE
When this mode is used, output the audio signal of front L/R chan-
nel to all channel.
Procedure:
1.  While pressing the [MULTI STEREO] and [MOVIE] buttons, 
press the [
?/1
] button to turn on the main power. 
2.  The message “SWP. ALL” appears.
3.  After a few seconds, “SWAP” will appear (No change while 
displayed).
SHIPMENT  MODE
All preset contents are cleared when this mode is activated.  Use 
this mode before returning the product to clients upon completion 
of repair.
Procedure:
1.  While pressing the [NIGHT MODE] and [MULTI STEREO] 
buttons, press the [
?/1
] button to turn on the main power. 
2.  The message “CLEARING” appears.
DCAC  FACTORY  TEST  MODE
DCAC Factory Test mode have two stages:
1.  DCAC DSP Data Line Checking 
2.  DCAC board Checking
Factory Test System Setup
1.  When power off : 
 
While pressing the [GAME] and [MOVIE] buttons, press the 
[
?/1
] button to turn on the main power .
 
“DCAC  FTM” appears.  
 
Afterward, press the [NIGHT MODE] to start DCAC factory 
test mode.
SPK Front Left
DCAC MIC
Receiver
DSP Data Line
Check
Start
Pass
Pass
Auto Cal Mic
Check
END
ST HDMI  COAX  OPT
L
C
R
SL
S
SR
SB SBR
SBL
SW
LFE SP A SP B EQ
S-AIR
MEM
RDS
D.RANGE
SLEEP
FM
AM
SAT  CAT  ANALOG
mft.
DEX
k Hz   DTS-ES
dB
 96/24NE0:6
MHz
PLIIx
ST
HDMI  COAX
  OPT
SR
SB SBR
SBL
SW
LFE
EQ
MEM
D.RANGE
FM
SAT  CAT  
ANALOG
m
ft.
DEX
k Hz
DTS
-ES
dB 96/24
NE0:6
MHz
PL
IIx
ST
HDMI  COAX
  OPT
L
C
R
SL
S
SP A SP B
S-AIR
RDS
SLEEP
AM
SAT  CAT  
ANALOG
m
ft.
DEX
k Hz
DTS
-ES
dB 96/24
NE0:6
MHz
PL
IIx
STR-KM7500
8
1.  DCAC DSP Data Line Checking
After press the [TUNING MODE] button, DCAC Factory test 
mode will start, below display will show:
 
“DCAC   x” 
x = 1, 2, 3, 4
  
If there is error happen, below display will show:
 
“ERR SD0x”  x = 1 
→ D1501 or R1530 problem
 
 
x = 2 
→ D1502 problem 
 
 
x = 3 
→ D1503 problem 
 
 
x = 4 
→ D1504 problem 
2.  DCAC board Checking
Connect front left speaker of the receiver and AUTO CAL micro-
phone. Turn [MASTER VOLUME] jog, there will be test tone 
sound output from front left speaker, and the display will change 
accordingly.
 
“AD - xxx” 
xxx = 0 to 255 (depends on loudness of test tone)
Note
When the value reaches more than 222, the test tone will muted 
(for production line checking). Thus, the AD value will drop to 0. 
To check the AD value again, power off the receiver and re-enter 
the test mode.
VACS  CONTROL  TEST  MODE
The VACS feature of the amplifi er is turned off purposely.
Procedure:
1.  While pressing the [MUSIC] and [A.F.D] buttons, press the 
[
?/1
] button to turn on the main power.
2.  The message “VACS OFF” appears.
HISTORY MODE
* The state that the set is used is memorized.
* Procedure:
1. While depressing the [GAME]  and the [A.F.D.] buttons simul-
taneously, press the [
?/1
] button to turn on the main power.
2. “HISTORY” appears.
3. Each time the [↑] / [↓] buttons on the remote commander is 
pressed, the item is switched in order as follows.
Items
Protector Count
COUNT XX
Total single power on time
SXXXHXXM
Sound Field
SND FLD 
Input function
FUNCTION
Input Mode
INP MODE
Digital Select
DIGI IN 
Stream information
STREAM 
Signal confi guration
CO XXXXX
Headphones
HP XXX
Volume
VOL XXX
Bass Setting
BASS XXX
Treble Setting
TREB XXX
Front Level Setting
F XXX 
Center Level Setting
CT XXX
Surround Left Level Setting
SL XXX
Surround Right Level Setting
SR XXX
Surround Back Left Level Setting
BL XXX
Surround Back Right Level Setting
BR XXX
Subwoofer Level Setting
SW XXX 
Total power on time
TXXXHXXM
Muting Status
MUTE XXX
Power on counter (Rebox test mode)
P.W. XXX
Protector Type
PRT XXXX
Temperature when protect
TEM XXXC
PROTECTOR AUTO OFF
* Procedure:
1. While depressing the [NIGHT MODE] and the [MUSIC] 
buttons simultaneously, press the power [
?/1
] button to 
turn on the main power.
2. “PROTEVER” appears.
STR-KM7500
9
SECTION  4
ELECTRICAL  CHECK
FM  AUTO  STOP  CHECK
signal
generator
set
Procedure:
1.  Turn on the set.
2.  Input the following signal from signal generator to FM an-
tenna input directly.
Carrier frequency: A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation  : 75 kHz
Modulation  : 1 kHz
ANT input  : 1 kHz
Note:  Use 75 ohm coaxial cable to connect signal generator and the set. 
You cannot use video cable for checking.
 
Use signal generator whose output impedance is 75 ohm.
3.  Set to FM tuner function and scan the input FM signal with 
automatic scanning.
4. Confi rm that input frequency of A, B and C are detected and 
automatic scanning stops.
When the station signal is received in good condition, automatic 
scanning stops.
STR-KM7500
10
SECTION  5
DIAGRAMS
•  Circuit Boards Location
VIDEO 2 board
INSULATOR board
CONNECTION board
MAIN board
VIDEO board
DIGITAL board
TUNER (FM/AM)
HDMI board
STANDBY DCDC board
AC SELECT board (E51 only)
THERMAL SENSOR board
POWER KEY board
HP SUPPORT board
DISPLAY board
HEADPHONE board
Page of 80
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