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SP-HF500AService Guide
SERVICE GUIDE
KYE SYSTEM CORP
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Service Guide
Revision History
Version Date Change
1.0 07/08/2009
Version 1.0 Page 2 of 17
SP-HF500A
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Service Guide
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Table of Contents
SP-HF500A
no power .LED (indicator) unlighted ..................................................5
Safety Precautions ................................................................................4
Part List .................................................................................................17
No sound ................................................................................................6
Right or left channel no sound ............................................................7
Chapter 7. Schematic diagram...........................................................16
Chapter 4 Exploded view...............................................................14~15
Chapter 2.Specifications......................................................................11
VR,headphone jack or line-in jack abnormal ....................................10
Headphone jack output no sound........................................................9
LED indicator no light...........................................................................8
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Getting Start
Pay S pecial Attention: Instructions that are i mportant to remember and may
prevent m istakes.
Caution: Info rmation that, if not followed, may result in d amage to theprod uct.
Safety Precautions
Do never place the system in the high-temp and humidity circumstance,
prevent it from raining or rough h andling and strong shock.
* In or der to a void electrified and other accidents, do never open the back
cover for repair without an y professional guidance. In case of repair pls.
come to the professional maintenance for help.
* In case fragments or other liquid is accidentally sprinkled inside the
cabinet, please switch off the po wer immediately.
* Swi tch off the power and take off the plug from the power jack w hen
the system is not on work.
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Service Guide
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SP-HF500A
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*Attention
Please follow the numbered sequence marked within parenthesis given in
individual
Flow chat in that this is the best-recommended sequence to rectify the problems.
1.2.1 No powerLED indicatorunlighted
Problem
Analyze
and
identify
the
causes
Solutions
No powerLED indicatorunlighted
Repair or replace
Defective transformer
Defective or damaged
AC cable or power
switch
resolder or replace
Or caused by the following:
1. Transformer secondary wire loosely connected with 1CN5
jack in SP-HF500 AMP .
2. Copper foil ofSP-HF500AMP PCB broken
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Version 1.0 Page 6 of 17
SP-HF500AService Guide
1.2.2 No sound
Problem
Analyze and
identify the
causes
]
Solutions
No sound
PCB
short-circuited, dry
soldered or
broken;
1CN2 1CN3 SP-HF500A and1CN4
in SP-HF500A AMP is not
properly connected
Repair or replace
Repair or replace
Or caused by the following defective
components
1. U1, U2 in SP-HF500AAMP PCB
2. VR1N1N2 in SP-HF500A AMP
PCB
Repair, resolder or
replace
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Version 1.0 Page 7 of 17
Service Guide SP-HF500A
1.2.3 Right or left channel no sound
Problem
Analyze and
identify the
causes
Solutions
Replace or
replace
Re-connect ,
replace or repairRepair or
replace
1. VR1 VR2 N1 N2 defective in SP-HF500A
AMP PCB
2. Or caused by the following defective
:stnenopmoc
R8 R2 R4 R14 C10 C5 R27 R28 C7 C9 C32C14 C20 C31 U1 U2 SPL
Driver unit 1CN2 1CN3
or speaker
cable defective or
loosely connected
AUDIO JACK 1N1
defective or looselyconnected
PCB damaged, dry-soldered
or short-circuited;
AUDIO CABLE 1CN4
in SP-HF500 AMP is loosely
connected
Right or left channel no sound
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Version 1.0 Page 8 of 17
Service Guide SP-HF500A
1.2.5 Noise
Problem
Analyze and
identify the
causes
Solutions
Filter capacitor/ diode dry-soldered
or damaged, pls check C19 C21C18C17 C13 ID1 ID2 ID3 ID4
in S P - H F 5 0 0 AMP defective
or not
The power supply of each IC isnormal or not;
Or caused by vibration from
too long lead wire of driver
units
Driver units damaged
Dosed not well
RepairCheck and replace Repair or replace
Noise
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SP-HF500A
Service Guide SP-HF500A
1.2.6 LED indicator no light
Problem
Analyze and
identify the
causes
Solutions
Check and replace
1. PCB damaged, dry-soldered or short-circuited
2. R1 in SP-HF500A AMP PCB R1defective
3. Defective LED1 in SP-HF500A AMP PCB
LED indicator no light
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Service Guide SP-HF500A
1.2.7 Headphone jack output no sound
Problem
Analyze and
identify the
causes
Solutions
Check and replace
N1 in SP-HF500A AMP PCB defective or its
related copper foil broken
Headphone jack no sound
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VR:
Defective VR may cause VR1 in
S P - H F 5 0 0 A Z M P PCB or VR2 in
S P - H F 5 0 0 A PCB having scratching
sound when rotating
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Service Guide SP-HF500A
1.2.8 VR, headphone jack or line-in jack abnormal
Problem
Analyze and
identify the
causes
Solutions
Check and replace Check and replace
Jack:
N1 N2 in SP-HF500A AMP PCB
defective
VR, headphone jack or line-in jack abnormal
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SP-HF500A
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8.3
620
180
395
0.5 0.4
29
20K
46
0.9
0.6 0.7
1
47
20K 20K
28 30
390
185
625
8.4
180
390
S/N@RATED O/P POWER
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AUX1
AUX2
MASTER
VOLUME
4558
TD
A7266SA
L
POWER
AMP
FILTER
POWER
SPEAKER
SATELLITE
R
SPEAKER
SATELLITE
PHO
NE
JACK
TREBLE
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SP-HF5
00A
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SP-HF500AChapter 4 Exploded view
Right Satellite
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SP-HF500A
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SP-HF500A
Left SatelliteChapter 4 Exploded view
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Cha ter 7. Schematic dia ram
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Part List
Part No. Description
21.4.014.0055 Knob 1
21.4.014.0056 Knob 2
21.6.020.0024 Wood Cabinet
11.2.001.0075 Transformer
11.1.170.0056 IC UTC4558
11.1.170.0114 IC TDA7266SA
11.1.260.0627 PCB
21.8.030.0015 Speaker Unit 3"810W
21.8.913.0006 0.5" 8 5W
11.3.001.0026 AC cable
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