STR KS600 Sony FM-AM stereo receiver, test modes, schematic Using STR F6168 as SMPS Switching Regulator

Sony STR-KS600PM/KS600PW FM STEREO/FM-AM RECEIVER

AEP Model: STR-KS600PM/KS600PW

UK Model: STR-KS600PM

STR-KS600PM is the receiver section in HT-SF800M.
STR-KS600PW is the receiver section in HTP-32SS.

Power Output1)
Models of area code CEL, CEK
(4 ohms 1 kHz, THD 0.7%)
FRONT2): 70 W/ch
CENTER2): 70 W
SURR2): 70 W/ch
(4 ohms 100 Hz, THD 0.7%)
SUB WOOFER2): 70 W
(4 ohms 1 kHz, THD 10%)
FRONT2): 100 W/ch
CENTER2): 100 W
SURR2): 100 W/ch
(4 ohms 100 Hz, THD 10%)
SUB WOOFER2): 100

About area codes
The area code of the receiver you purchased is shown on the lower portion of the rear panel

Any differences in operation, according to the area code, are clearly indicated in the text, for example, “Models of area code AA only”.

Ex: 2-XXX-XXX-XX AA

New part of EEPROM (IC1131) on the DIGITAL board cannot be used. Therefore, if the mounted DIGITAL board (A-1097-941-A) is replaced, exchange new microcomputer and new EEPROM with
that used before the replacement.

TEST MODES

FACTORY PRESET MODE
All preset contents are reset to the default setting.
1. While pressing the PLII and [PRESET TUNING +] buttons, press the I/1 button to turn on the main power.
2. The message “FACTORY” appears and the present contents are reset to the default values.

ALL CLEAR MODE
All preset contents are cleared when this mode is activated. Use this mode before returning the product to clients upon completion of repair.
1. While pressing the PLII and [PRESET TUNING --] buttons, press the Power  button to turn on the main power.
2. The message “CLEARING !” appears and the memories are reset to the default values.
3. When done, the message “CLEARED” appears.

FL CHECK MODE
All fluorescent segments are tested. When this test is activated, all segments turn on at the same time, then each segment turns on one after another.
1. While pressing the [MUTING] and [PRESET TUNING --] buttons, press the Power button to turn on the main power.
2. All segments and all LEDs turn on.
3. Press the [INPUT SELECTOR] button.
4. Half of segments and [VIDEO 1], [SA-CD/CD] LEDs turn on.
5. Press the [INPUT SELECTOR] button once again.
6. Others half of segments and [VIDEO 2], [DVD] LEDs turn on.
7. Press the [INPUT SELECTOR] button once again.
8. All segments and all LEDs turn off.

VERSION MODE
When this mode is used, the model, the destination and the software version number are displayed.
1. While pressing the [SOUND FIELD] and [PRESET TUNING --] buttons, press the Power button to turn on the main power.
2. The model, the destination and the software version number appear.

KEY CHECK MODE
This mode is used to check the key.
1. While pressing the [MUTING] and [INPUT SELECTOR] buttons, press the Power button to turn on the main power.
2. The message “REST 06” appears.
3. Every pressing of any button other than the I/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” appears.

PROTECTOR AUTO OFF MODE
When this mode is used, a protector on state is maintainable.
1. While pressing the [MUTING] and PLII buttons, press the Power button to turn on the main power.
2. The message “PROT EVER” appears.

SOUND FIELD CLEAR MODE
The preset sound field is cleared when this mode is activated. Use this mode before returning the product to clients upon completion of repair.
1. While pressing the [SOUND FIELD] button, press the Power button to turn on the main power.
2. The message “SF. CLR.” appears and initialization is performed.

RDS AUTOBETICAL MODE
1. While pressing the [INPUT SELECTOR] button, press the Power button to turn on the main power.
2. The message “AUTO-BET” appears and scans and stores all the FM and FM RDS stations in the broadcast area.
3. When done, the message “FINISH” appears.

Digital board schematic

D-Amp board schematic

Display board schematic

Power supply [SMPS] and speaker out section schematic