KYE Systems Corp. Genius SP-HF1250K User manual

S
SE ER RV VI IC CE E G GU UI ID DE E
KYE SYSTEMS CORP.
S
SP P- -H HF F1 12 25 50 0K K
Version:2.0
Total 16 Pages (Cover Page included)

Version: 2.0 Page 1/16
Version Date Changes
1．0 Official Release
2．0 07.06.25
s
Guide
ervice SP-HF1250K
Revision Histor
y

Version: 2.0 Page 2/16
Revision History……………………………………………………………… ……..1
Table of Contents………………………………………………… ………….2
Getting Started………………………………………………… ……….……………....3
Conventions Used in this Guide………………… ………...…………….….3
Safety Precautions……………………………… ………………...…….…..3
Chapter1. How to Handle Defective Returns………………… ……………………..….4
1.1 Overview…………………………………………………………...…….4
1.2 Problems………………………………………………………...………..5
1.2.1 Power LED (indicator) Unlighted………………...…………….........6
1.2.2 Does not work or one channel no sound……………………………..7
1.2.3 Noise……………………………………………………………...….7
Chapter2. Specifications……………………………………………………………...…..8
Chapter3. Block Diagram………………………………………………………………...9
Chapter4. Exploded View………………………………………………………….…10-11
Chapter5. Part List…………………………………………………………….……..12-13
Chapter6. Important Notes……………………………………………………………....14
6.1 Packing Requirement for sending the PCB Assembly by post……………14
6.2 Short of Spare Parts while Repairing a Speaker System……………….….14
Chapter7. Circuit Schematic…………………………………………………………15-16
s
Guide
ervice SP-HF1250K
Table of Contents

Version: 2.0 Page 3/16
Conventions Used in this Guide
Pay Special Attention: Instructions that areimportantto
remember and may prevent mistakes.
Safety Precautions
The following precautions should be observed in handling the speaker described in this guide:
Place the speakers on a flat level and stable surface.
Do not place the speakers in environments subject to mist, smoke, vibration, excessive dust, salty
or greasy air, or other corrosive gases and fumes.
Do not drop or jolt the speakers.
Do not allow anything to drop into the subwoofer case through its ventilator, as it could result
in fatal electric shock or fire.
Place the unit far enough from other equipments for good heat dissipation.
Disconnect the AC power cord from the AC outlet before performing any maintenance on the
speakers.
Do not perform any maintenance with wet hand.
Prevent foreign substance, such as water, other liquids or chemicals, from entering the speakers
while performing maintenance procedures on the speakers.
s
Guide
ervice SP-HF1250K
Getting Started
Attention
Caution: Information that, if not followed, may result in
damage to the product.

Version: 2.0 Page 4/16
1.1 Overview
s
Guide
ervice SP-HF1250K
Chapter 1. How to Handle Defective Returns
Receiving Defective
Speakers
from Customers
Verifying problems&
Proceeding necessary tests
Analyzing possible
Malfunction causes
Deciding & proceeding
the rectification methods
Replacing necessary
Defective parts
Proceeding tests
To verify if the speaker is
functioning normally
Functioning OK
Return the speakers with
Pro
p
er re
p
acka
g
in
g
to customers
Functioning NG Functioning OK
Functioning NG

Version: 2.0 Page 5/16
1.2 Problems
Item Problemdescriptions
1.2.1 Power LED (indicator) unlighted
1.2.2 Does not work or one channel no sound
1.2.3 Noise
s
Guide
ervice SP-HF1250K

Version: 2.0 Page 6/16
Attention
1.2.1 Power LED (indicator) unlighted
s
Guide
ervice SP-HF1250K
Please follow the numbered sequence marked within parenthesis given in individual
Flow chart, in that this is the best-recommended sequence to rectify the problems.
Problem
Analyze
and
Identify
the Causes
Solutions
Secondary wire Of
transformer is
Disconnedcted of
defective
CheckD1.2
.5.6
Check
Q1 9014
Defective power
Switch or LED
Resolder or replace defective component（s）
Power LED （indicator）unlighted

Version: 2.0 Page 7/16
1.2.2 Does not work or one channel no sound
1.2.3 Noise
s
Guide
ervice SP-HF1250K
Problem
Analyze and
Identify the
Causes
Solutions
Mic Does not work or
One channel no sound
Broken o
r
Short circuit
Defective IC
Defective
Audio cable
Replace
Audio cable
Check solde
r
Points on PCB
And resolder
defective one(s)
Check and replace
Defective IC
Problem
Analyze and
Identify the
Causes
Solutions
Noise
Defective VR Defective IC
Check and replace
defective component(s)
Replace
Defective VR
Replace defective IC
Component(s) aroun
d
IC is/are defective

Version: 2.0 Page 8/16
Satellite
No
.
DESCRIPTION UNIT NOMINAL LIMIT
FR FL
1. FRONT OUTPUT POWER @THD 10% W 25 25 ≥20
2 SENSITIVITY（1KHz）@RATED O/P
POWER
mV 725 725
±50
3 SENSITIVITY(1KHz)@1W O/P POWER mV 135 135 ±15
4 MAX INPUT LEVEL@1% THD mV 600 600 ±40
5 FREQUENCY RESPONSE(1KHz=0dB)
1Hz dB -2 -2
±0.5
1K dB 0 0
±0.5
90K dB -3 -3
±0.5
6 S/N @RATED O/P POWER dB 75 75 ≥60
7 CHANNEL UNBALANCE @REF O/P
POWER
dB 0.3 0.3
≤0.5
8 CHANNEL SEPARATION(ONE
CHANNEL IN; OTHER CHANNEL INPUT
SHORTING)
dB 49 49
≥40
9 HUM NOISE (VR MAX)
(VOLUME MAX; INPUT SHORTING)
mV 2.5 2.5
≤10
10 HUM NOISE (VR MIN)
(VOLUME MIN. INPUT SHORTING)
mV 1.5 1.5 ≤5
s
Guide
ervice SP-HF1250K
Chapter 2. Specifications

Version: 2.0 Page 9/16
s
Guide
ervice SP-HF1250K
Chapter 3. Block Diagram