To Next PageTo Next PageWhat to do if Yamaha YST-SW1500 has no sound?
If your Yamaha Subwoofer is not producing any sound, first, ensure that the volume isn't set to the minimum; increase it if it is. Secondly, verify that the speaker cables are securely connected.
Why Yamaha Subwoofer does not turn on automatically?
If your Yamaha Subwoofer isn't turning on automatically, check the following: 1. Make sure the POWER switch is in the ON position. 2. Ensure the subwoofer isn't in standby mode (power indicator not lit) by pressing the STANDBY/ON button. 3. Verify the AUTO STANDBY switch is set to “HIGH” or “LOW”. 4. If the input signal is too low, set the AUTO STANDBY switch to the “HIGH” position.
Why Yamaha Subwoofer turns into standby mode unexpectedly?
If your Yamaha subwoofer turns into standby mode unexpectedly, it might be due to a low input signal level. Try setting the AUTO STANDBY switch to the “HIGH” position.
How to fix Yamaha YST-SW1500 Subwoofer when power is not supplied?
If your Yamaha Subwoofer isn't receiving power, even when the STANDBY/ON button is set to ON, ensure the power cable is securely connected to both the AC IN socket on the subwoofer and a functioning AC outlet. Also, verify that the POWER switch is set to the ON position.
What to do if Yamaha YST-SW1500 Subwoofer remote control does not work?
If the remote control for your Yamaha Subwoofer isn't working, it might be due to direct sunlight or lighting (like an inverter-type fluorescent lamp) affecting the remote control sensor. Try changing the position of the main unit.
What to do if Yamaha YST-SW1500 Subwoofer sound level is too low?
If the sound level from your Yamaha Subwoofer is too low, check the following: 1. Ensure speaker cables are correctly connected: L to L, R to R, “+” to “+” and “–” to “–’. 2. Try setting the PHASE to another mode. 3. Play a source sound with bass frequencies or set the HIGH CUT control to a higher position. 4. Reposition the subwoofer or disrupt parallel surfaces by placing bookshelves along the walls to address standing waves.
Why Yamaha YST-SW1500 turns on unexpectedly?
If your Yamaha Subwoofer turns on unexpectedly, it might be due to noise from external appliances. Try moving the subwoofer away from these appliances and/or repositioning the connected speaker cables. Alternatively, set the AUTO STANDBY switch to the “OFF” position.
What to do if Yamaha Subwoofer makes household breaker go off?
If the household breaker goes off when using your Yamaha Subwoofer, it could be due to high electricity consumption when a high-level signal is inputted. Try turning down the volume on the amplifier connected to the subwoofer or cutting off power to other unused equipment.
Why Yamaha Subwoofer remote control range decreases?
If the usable distance or range of your Yamaha Subwoofer's remote control has decreased, the batteries may be weak. Replace them with new ones.
Key safety warnings and important disclaimers for service personnel.
Critical components and leakage current measurement guidelines for service.
Overview of the YST-SW1500 front panel controls and indicators.
Identification of rear panel connectors and controls for various models.
Detailed specifications including power output, input sensitivity, impedance, and dimensions.
Step-by-step guide for safely disassembling the front panel assembly.
Step-by-step guide for safely disassembling the rear panel assembly.
Guidance on setting up the unit for servicing and using extension cables.
Procedure for removing the speaker driver unit.
Methods for diagnosing and repairing the power amplifier section (MAIN (1) P.C.B.).
Methods for diagnosing and repairing the switching power supply section (POWER (1) P.C.B.).
Procedure to confirm correct operation of the power amplifier section.
Procedure to adjust and stabilize amplifier operation by setting DC voltage.
Details and pin assignments for IC12 (LC651152N) microcontroller.
Functional block diagram illustrating the YST-SW1500 system architecture.
Block diagrams and pin connection details for various ICs used in the unit.
Component placement diagram for the MAIN (1) printed circuit board.
Component placement diagram for the POWER (1) printed circuit board.
Component placement diagrams for MAIN (2) and POWER (2) printed circuit boards.
Component placement diagrams for POWER (3) and INLET printed circuit boards.
Detailed circuit schematic illustrating the complete YST-SW1500 wiring and components.
Comprehensive list of electrical components with part numbers and descriptions.
Detailed list of components mounted on the MAIN P.C.B.
Detailed list of components mounted on the POWER P.C.B.
Diagram showing the assembly of the YST-SW1500 unit.
List of mechanical parts with part numbers and descriptions.
List of parts specific to the front panel assembly.
List of parts specific to the rear panel assembly.
Schematic of the remote control circuit and data codes for its functions.
List of carbon resistors with their values and corresponding part numbers.
General
