Category: Audio System Repair and Service
Contents of this article
- Accessing Test modes
- FM Tuner cheeking
- Power Amplifier schematic digram
SONY STR-DH130
TEST MODE
AM CHANNEL STEP 9 kHz/10 kHz
SELECTION MODE (US, Canadian model only)
Either the 9 kHz step or 10 kHz step can be selected for the AM channel step.
Procedure:
1. While pressing the [TUNING MODE] button, press the [POWER] button to turn on the main power.
2. The message “9K STEP” or “10K STEP” appears for a moment and the channel step is changed.
SOFTWARE VERSION DISPLAY MODE
The software version is displayed.
Procedure:
1. While pressing the [SPEAKERS (OFF/A/B/A+B)] and the [MUTING] buttons simultaneously, press the [POWER] button to turn on the main power.
2. The destination and the software version are displayed.
Either the 9 kHz step or 10 kHz step can be selected for the AM channel step.
Procedure:
1. While pressing the [TUNING MODE] button, press the [POWER] button to turn on the main power.
2. The message “9K STEP” or “10K STEP” appears for a moment and the channel step is changed.
SOFTWARE VERSION DISPLAY MODE
The software version is displayed.
Procedure:
1. While pressing the [SPEAKERS (OFF/A/B/A+B)] and the [MUTING] buttons simultaneously, press the [POWER] button to turn on the main power.
2. The destination and the software version are displayed.
KEY CHECK MODE
Button check
Procedure:
1. While pressing the [SPEAKERS (OFF/A/B/A+B)] and the [DIMMER] buttons simultaneously, press the [POWER] button to turn on the main power.
2. The message “REST 13” appears.
3. Every press of any button other than the [POWER] counts down the buttons. The buttons which are already counted once are not counted again. When all buttons are pressed “REST 00” appears.
VACUUM FLUORESCENT DISPLAY TEST MODE
All fluorescent segments are tested. When this test is activated, all segments light on at the same time, then each segment lights on one after another.
Procedure:
While pressing the [SPEAKER (OFF/A/B/A+B)] and the [DISPLAY] buttons simultaneously, press the [POWER] button to turn on the main power.
1. ALL segments light on.
Button check
Procedure:
1. While pressing the [SPEAKERS (OFF/A/B/A+B)] and the [DIMMER] buttons simultaneously, press the [POWER] button to turn on the main power.
2. The message “REST 13” appears.
3. Every press of any button other than the [POWER] counts down the buttons. The buttons which are already counted once are not counted again. When all buttons are pressed “REST 00” appears.
VACUUM FLUORESCENT DISPLAY TEST MODE
All fluorescent segments are tested. When this test is activated, all segments light on at the same time, then each segment lights on one after another.
Procedure:
While pressing the [SPEAKER (OFF/A/B/A+B)] and the [DISPLAY] buttons simultaneously, press the [POWER] button to turn on the main power.
1. ALL segments light on.
2. Turn the [INPUT SELECTOR] control,
confirm display.
3. Turn the [INPUT SELECTOR] control, confirm
display.
4. Turn the [INPUT SELECTOR] control, all
segments light off.
HISTORY MODE
The state that the set is used is memorized.
Procedure:
1. While pressing the [TREBLE +] and [SPEAKERS (OFF/A/B/A+B)] buttons, press the [POWER] button to turn on the power and “HISTORY” is displayed.
2. Each time the [UP]/[DOWN] buttons on the remote commander is pressed, the item is switched in order as follows.
HISTORY MODE
The state that the set is used is memorized.
Procedure:
1. While pressing the [TREBLE +] and [SPEAKERS (OFF/A/B/A+B)] buttons, press the [POWER] button to turn on the power and “HISTORY” is displayed.
2. Each time the [UP]/[DOWN] buttons on the remote commander is pressed, the item is switched in order as follows.
Item
|
Display
|
History
|
HISTORY
|
Count
how many time of protector happen
|
COUNT
xx
|
Total
single power on time
|
xxxxxHxx01
|
Input
function
|
FUNCTION
|
HP
ON/OFF
|
HP
xxx
|
Volume
|
VOL
xxx
|
Bass
|
BASS
xxx
|
Treble
|
TREB
xxx
|
Balance
|
F
xxx
|
Total
power on time
|
xxxxxHxx02
|
Muting
|
MUTE
xxx
|
Power
on counter (Rebox Test Mode)
|
REBXxxxx
|
Protector
Type
|
PROTxxxx
|
VACS
step
|
VACS
xx
|
Return
to history
|
HISTORY
|
PROTECTOR AUTO OFF
To disable auto off after protector occur
Procedure:
1. While pressing the [TREBLE -] and [SPEAKERS (OFF/A/B/ A+B)] buttons, press the [POWER] button to turn on the main power.
2. “PROT OFF” appears and switch off the set.
SHIPMENT MODE
All preset contents are reset to the default setting.
Procedure:
1. While pressing the [TUNING MODE] and the [MUTING] buttons simultaneously, press the [POWER] button to turn on the main power.
2. “CLEARING” and “CLEARED” appear and switch off the set.
Procedure:
1. While pressing the [TREBLE -] and [SPEAKERS (OFF/A/B/ A+B)] buttons, press the [POWER] button to turn on the main power.
2. “PROT OFF” appears and switch off the set.
SHIPMENT MODE
All preset contents are reset to the default setting.
Procedure:
1. While pressing the [TUNING MODE] and the [MUTING] buttons simultaneously, press the [POWER] button to turn on the main power.
2. “CLEARING” and “CLEARED” appear and switch off the set.
DESTINATION WRITE MODE
Write the set destination when the destination is “UNKNOWN”.
This mode can be performed once only.
Procedure:
1. Press the [POWER] button to turn on the main power.
2. Press the [FM MODE] and [DISPLAY] buttons simultaneously.
3. “DEST XXX” appears and turns [INPUT SELECTOR] to select the required destination.
Write the set destination when the destination is “UNKNOWN”.
This mode can be performed once only.
Procedure:
1. Press the [POWER] button to turn on the main power.
2. Press the [FM MODE] and [DISPLAY] buttons simultaneously.
3. “DEST XXX” appears and turns [INPUT SELECTOR] to select the required destination.
Selection
|
Destination
|
DEST
U2
|
U.S.A
|
DEST
CEL
|
Europe
|
DEST
CA2
|
CANADA
|
4. Press [MEMORY/ENTER] button to save the
destination.
5. “CLEARING” and “CLEARED” appear and the set will switch on.
6. Perform [SOFTWARE VERSION DISPLAY MODE] to confirm the written destination.
6. Perform [SOFTWARE VERSION DISPLAY MODE] to confirm the written destination.
FM TUNER CHECK
Procedure:
1. Turn on the set.
2. Input the following signal from Signal Generator to FM
antenna input directly.
Carrier Frequency: A=87.5 MHz, B=98 MHz, C=108 MHz
Deviation : 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)
Note:
Please use 75 ohm “coaxial cable” to connect SG and the set. You cannot use video cable for checking.
Please use SG whose output impedance is 75 ohm.
3. Set to FM tuner function and scan the input FM signal with automatic scanning.
4. Confirm that input Frequency of A, B and C are detected and automatic scanning stops.
The stop of automatic scanning means “The station signal is received in good condition.”
1. Turn on the set.
2. Input the following signal from Signal Generator to FM
antenna input directly.
Carrier Frequency: A=87.5 MHz, B=98 MHz, C=108 MHz
Deviation : 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)
Note:
Please use 75 ohm “coaxial cable” to connect SG and the set. You cannot use video cable for checking.
Please use SG whose output impedance is 75 ohm.
3. Set to FM tuner function and scan the input FM signal with automatic scanning.
4. Confirm that input Frequency of A, B and C are detected and automatic scanning stops.
The stop of automatic scanning means “The station signal is received in good condition.”
POWER AMPLIFIER SCHEMATIC DIAGRAM
USING STK350-630TS-E
CLICK ON THE IMAGE TO ZOOM IN
