TAD TAD TAD-M600 User manual
ORDER NO.
TECHNICAL AUDIO DEVICES LABORATORIES, INC. 2010
TECHNICAL AUDIO DEVICES LABORATORIES, INC. 1-1, Shin-ogura, Saiwai-ku, Kawasaki-shi, Kanagawa 212-0031, Japan
2010 Printed in Japan
TAD-M600
CRT4485
MONAURAL POWER AMPLIFIER
TAD-M600
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model Type Power Requirement Remarks
TAD-M600 U AC 120 V
TAD-M600 Y5 AC 230 V
For details, refer to "Important Check Points for good servicing".
K-IZZ JAN.
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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SAFETY INFORMATION
1. SAFETY PRECAUTIONS
The following check should be performed for the
continued protection of the customer and service
technician.
LEAKAGE CURRENT CHECK
Measure leakage current to a known earth ground
(water pipe, conduit, etc.) by connecting a leakage
current tester such as Simpson Model 229-2 or
equivalent between the earth ground and all exposed
metal parts of the appliance (input/output terminals,
screwheads, metal overlays, control shaft, etc.). Plug
the AC line cord of the appliance directly into a 120V
AC 60 Hz outlet and turn the AC power switch on. Any
current measured must not exceed 0.5 mA.
ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL
SHOCK HAZARD AND MUST BE CORRECTED BEFORE
RETURNING THE APPLIANCE TO THE CUSTOMER.
2. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in the appliance
have special safety related characteristics. These are
often not evident from visual inspection nor the protection
afforded by them necessarily can be obtained by using
replacement components rated for voltage, wattage, etc.
Replacement parts which have these special safety
characteristics are identified in this Service Manual.
Electrical components having such features are
identified by marking with a >on the schematics and on
the parts list in this Service Manual.
The use of a substitute replacement component which
does not have the same safety characteristics as the
PIONEER recommended replacement one, shown in the
parts list in this Service Manual, may create shock, fire,
or other hazards.
Product Safety is continuously under review and new
instructions are issued from time to time. For the latest
information, always consult the current PIONEER Service
Manual. A subscription to, or additional copies of,
PIONEER Service Manual may be obtained at a nominal
charge from PIONEER.
Leakage
current
tester
Reading should
not be above
0.5 mA
Device
under
test
Test all
exposed metal
surfaces
Also test with
plug reversed
(Using AC adapter
plug as required)
Earth
ground
AC Leakage Test
(FOR USA MODEL ONLY)
WARNING
This product may contain a chemical known to the State of California to cause cancer, or birth defects or other reproductive
harm.
Health & Safety Code Section 25249.6 - Proposition 65
NOTICE
(FOR CANADIANMODEL ONLY)
Fuse symbols (fast operating fuse) and/or (slow operating fuse) on PCB indicate that replacement parts must
be of identical designation.
REMARQUE
(POUR MODÈLE CANADIENSEULEMENT)
Les symboles de fusible (fusible de type rapide) et/ou (fusible de type lent) sur CCI indiquent que les pièces
de remplacement doivent avoir la même désignation.
This service manual is intended for qualified service technicians ; it is not meant for the casual do-it-
yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained
to properly and safely repair complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may
void the warranty. If you are not qualified to perform the repair of this product properly and safely, you
should not risk trying to do so and refer the repair to a qualified service technician.
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
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[Important Check Points for Good Servicing]
In this manual, procedures that must be performed during repairs are marked with the below symbol.
Please be sure to confirm and follow these procedures.
1. Product safety
Please conform to product regulations (such as safety and radiation regulations), and maintain a safe servicing environment by
following the safety instructions described in this manual.
1 Use specified parts for repair.
Use genuine parts. Be sure to use important parts for safety.
2 Do not perform modifications without proper instructions.
Please follow the specified safety methods when modification(addition/change of parts) is required due to interferences such as
radio/TVinterference and foreign noise.
3 Make sure the soldering of repaired locations is properly performed.
When you solder while repairing, please be sure that there are no cold solder and other debris.
Soldering should be finished with the proper quantity. (Refer to the example)
4 Make sure the screws are tightly fastened.
Please be sure that all screws are fastened, and that there are no loose screws.
5 Make sure each connectors are correctly inserted.
Please be sure that all connectors are inserted, and that there are no imperfect insertion.
6 Make sure the wiring cables are set to their original state.
Please replace the wiring and cables to the original state after repairs.
In addition, be sure that there are no pinched wires, etc.
7 Make sure screws and soldering scraps do not remain inside the product.
Please check that neither solder debris nor screws remain inside the product.
8 There should be no semi-broken wires, scratches, melting, etc. on the coating of the power cord.
Damaged power cords may lead to fire accidents, so please be sure that there are no damages.
If you find a damaged power cord, please exchange it with a suitable one.
9 There should be no spark traces or similar marks on the power plug.
When spark traces or similar marks are found on the power supply plug, please check the connection and advise on secure
connections and suitable usage. Please exchange the power cord if necessary.
aSafe environment should be secured during servicing.
When you perform repairs, please pay attention to static electricity, furniture, household articles, etc. in order to prevent injuries.
Please pay attention to your surroundings and repair safely.
2. Adjustments
To keep the original performance of the products, optimum adjustments and confirmation of characteristics within specification.
Adjustments should be performed in accordance with the procedures/instructions described in this manual.
4. Cleaning
For parts that require cleaning, such as optical pickups, tape deck heads, lenses and mirrors used in projection monitors, proper
cleaning should be performed to restore their performances.
3. Lubricants, Glues, and Replacement parts
Use grease and adhesives that are equal to the specified substance.
Make sure the proper amount is applied.
5. Shipping mode and Shipping screws
To protect products from damages or failures during transit, the shipping mode should be set or the shipping screws should be
installed before shipment. Please be sure to follow this method especially if it is specified in this manual.
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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CONTENTS
SAFETY INFORMATION..........................................................................................................................................................2
1. SERVICE PRECAUTIONS ....................................................................................................................................................5
1.1 NOTES ON SOLDERING ...............................................................................................................................................5
1.2 SERVICE PRECAUTIONS..............................................................................................................................................5
1.3 FOR JIG..........................................................................................................................................................................5
2. SPECIFICATIONS .................................................................................................................................................................6
2.1 SPECIFICATIONS...........................................................................................................................................................6
2.2 PANEL FACILITIES .........................................................................................................................................................7
3. BASIC ITEMS FOR SERVICE...............................................................................................................................................8
3.1 CHECK POINTS AFTER SERVICING............................................................................................................................8
3.2 PCB LOCATIONS ...........................................................................................................................................................9
4. BLOCK DIAGRAM...............................................................................................................................................................10
4.1 OVERALL WIRING DIAGRAM......................................................................................................................................10
4.2 OVERALL BLOCK DIAGRAM.......................................................................................................................................12
5. DIAGNOSIS.........................................................................................................................................................................13
5.1 TROUBLESHOOTING ..................................................................................................................................................13
5.2 CIRCUIT DESCRIPTION ..............................................................................................................................................14
6. SERVICE MODE .................................................................................................................................................................19
7. DISASSEMBLY....................................................................................................................................................................20
8. EACH SETTING AND ADJUSTMENT ................................................................................................................................36
8.1 CD ADJUSTMENT........................................................................................................................................................36
9. EXPLODED VIEWS AND PARTS LIST...............................................................................................................................38
9.1 PACKING SECTION......................................................................................................................................................38
9.2 EXTERIOR SECTION...................................................................................................................................................40
9.3 CHASSIS SECTION .....................................................................................................................................................42
9.4 BOTTOM SECTION ......................................................................................................................................................44
9.5 PANEL SECTION..........................................................................................................................................................46
10. SCHEMATIC DIAGRAM ....................................................................................................................................................48
10.1 VOLTAGE AMP UNIT..................................................................................................................................................48
10.2 POWER AMP UNIT.....................................................................................................................................................50
10.3 PRIMARY UNIT...........................................................................................................................................................52
10.4 REGULATOR UNIT.....................................................................................................................................................54
10.5 PROTECTION UNIT ...................................................................................................................................................56
10.6 LED1 and LED2 UNITS ..............................................................................................................................................58
11. PCB CONNECTION DIAGRAM ........................................................................................................................................60
11.1 VOLTAGE AMP UNIT..................................................................................................................................................60
11.2 POWER AMP UNIT.....................................................................................................................................................64
11.3 PRIMARY UNIT...........................................................................................................................................................68
11.4 REGULATOR UNIT.....................................................................................................................................................70
11.5 PROTECTION UNIT ...................................................................................................................................................72
11.6 LED1 and LED2 UNITS ..............................................................................................................................................74
12. PCB PARTS LIST ..............................................................................................................................................................75
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TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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1. SERVICE PRECAUTIONS
1.1 NOTES ON SOLDERING
1.2 SERVICE PRECAUTIONS
1.3 FOR JIG
Compared with eutectic solders, lead-free solders have higher bond strengths but slower wetting times and higher melting
temperatures (hard to melt/easy to harden).
The following lead-free solders are available as service parts:
• Parts numbers of lead-free solder:
GYP1006 1.0 in dia.
GYP1007 0.6 in dia.
GYP10080.3 in dia.
• Be careful not to scratch or stain the cabinet during servicing, because it may cause a serious complaint.
• As the product weighs 90 kg, be fully careful when handling it. Four people are required when moving it.
• Be careful of the order of wire arrangement at a place where several wires are fixed together with a screw (on the power
main electrolytic capacitor, etc.), as this can affect the sound quality.
Follow the detailed procedure described in “7. DISASSEMBLY” .
• As the product has conical feet, be very careful not to scratch floor surfaces in the customer’ s home.
• Leads of power transistors supplied as service parts are NOT bent like ones used on the product.
Bend leads of supplied parts as shown the rough indication below before using.
Power transistor
7.2 mm
5.8 mm 8.5 mm
10 cm
8cm
40 cm
As the jig holds the transformer
and heatsink in place, align it with those parts.
View of the product held
in place by the jig
Jig
Jig
Approx. 22 cm apart
Jig for the Product (Recommended Sizes) and How to Use the Jig
Top
Top
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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2. SPECIFICATIONS
2.1 SPECIFICATIONS
(ADG7061: TAD-M600/U)
(ADG7062: TAD-M600/Y5)
(CBX1012)
(CRB3085: TAD-M600/U)
(CRD4431: TAD-M600/Y5)
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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3. BASIC ITEMS FOR SERVICE
3.1 CHECK POINTS AFTER SERVICING
Item to be checked regarding audio
Distortion
Noise
Volume too low
Volume too high
Volume fluctuating
Sound interrupted
No. Procedures Check points
1
2
3
Confirm whether the customer complain has been solved. The customer complain must not be reappeared.
Audio and operations must be normal.
Check the analog audio playback.
(Make the analog connections with a CD player.)
Each channel audio and operations must be normal.
Check the appearance of the product. No scratches or dirt on its appearance after receiving it for
service.
Items to be checked after servicing
To keep the product quality after servicing, confirm recommended check points shown below.
See the table below for the items to be checked regarding audio.
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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3.2 PCB LOCATIONS
PROTECTION
Unit
REGULATOR
Unit
PRIMARY
Unit
Bottom view
Front
NOTES :
-
Parts marked by " * " are generally unavailable because they are not in our Master Spare Parts List.
-
The >mark found on some component parts indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts of identical designation.
PRIMARY Unit (TAD-M600/U) CWH1518
PRIMARY Unit (TAD-M600/Y5) CWH1519
PROTECTIONUnit CWH1521
LED1 Unit CWH1522
LED2 Unit CWH1523
POWER AMP Unit CWH1516
VOLTAGE AMP Unit CWH1515
REGULATOR Unit CWH1520
Mark No. Description Part No.
LIST OF ASSEMBLIES
VOLTAGE AMP
Unit
POWER AMP
Unit
LED2 Unit LED1 Unit
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TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
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4. BLOCK DIAGRAM
4.1 OVERALL WIRING DIAGRAM
VOLTAGE AMP UNIT
(CWH1515)
POWER AMP UN
(CWH1516)
REGULATOR
UNIT
(CWH1520)
PRIMARY UNIT
(CWH1518: U)
(CWH1519: Y5)
GNDS
GNDS
GNDS
GNDS
V+55
GNDA
V-55
GNDS
GNDA
CN104
B4B-EH
1
2
3
4
CN204
B4B-EH
1
2
3
4
CN102
CKS6112
1
2
3
CN491
CDE9077
1
2
3
CN492
CDE9076
1
2
3
CN452
CDE9088
1
2
3
4
CN402
CDE9087
1
2
3
4
CN403
CKS6112
1
2
3
CN453
CKS6112
1
2
3
KN403
CND5464
1
KN402
CND5464
1
KN404
KN353
CND5464
1
KN354
CND5464
1
KN351
CND5464
1
KN352
CND5464
1
KN355
CND5306
1
KN356
CND5306
1
CN301
CKS6111
1
2
CN302
CKS6111
1
2
J301
CDE9059
1
2
3
KSH30A20
D351
1
1
2
2
KSH30A20
D352
1
1
2
2
KSH30A20
D353
1
1
2
2
KSH30A20
D354
1
1
2
2
KN603
CND5464
1
KN604
CND5464
1
KN605
CND5464
1
KN606
CND5464
1
KN601
CND5464
1
KN602
CND5464
1
CN608
CKS6112
1
2
3
CN607
CKS6112
1
2
3
CN651
CKS6112
1
2
3
CN652
CDE9089
1
2
3
4
5
6
7
S1
12
GNDS
FU1
12
FU2
12
FU3
12
12
CN101
B3B-EH
1
2
3
KN101
CND5464
1
CN351
CKS6111
1
2
GNDA
CN611
1
CN612
1
CN610
1
CN609
1
CN181
B2B-EH
1
2
12
12
12
CN303
CKS6112
1
2
3
B6B-EH
CN103
1
2
3
4
5
6
B6B-EH
CN203
1
2
3
4
5
6
CN451
CDE9072
1
2
3
4
CN401
CDE9073
1
2
3
4
LIVE
NEUTRAL
LIVE
NEUTRAL
P-SE1
P-SE2
GNDS
PRT LT
GNDS
V-12U
V-12
GNDP
V+12
T2N
T2L
ACRY1
ACRY2
T1L
T1N
GNDA
+OUTN
-OUTN
GNDS
NFBN
GNDS
GNDS
TR-B N
TR-C N
TR-E N
TR-E N
TR-B N
TR-C N
GNDS
+OUTP
-OUTP
NFBP
GNDS
GNDS
V+55
GNDA
V-55
+OUTN
-OUTN
NFBN
TR-E N
TR-B N
TR-C N
TR-E N
TR-B N
TR-C N
-OUTP
+OUTP
NFBP
OVLD+P
OVLD-P
AMPOUT P
GNDA
AMPOUT N
OVLD-N
OVLD+N
GNDA
+B
GNDA
OVLD-N
AMPOUT N
NC
NC
OVLD-P
AMPOUT P
T1:NO.3
T2:NO.4
T1:NO.4
T2:NO.3
RGAC1A
RGAC2A
RGAC2B
RGAC1B
V+B
V-B
V-55
GNDA
V+55
GNDP
+12V
-12V
REGULATOR
for
PROTECTION
+INPUT
-INPUT
T3(SUB TRANSFORMER)
T1(MAINTRANSFORMER)
T2(MAINTRANSFORMER)
GNDA
GNDA
No.1
No.2
No.1
No.2
No.3
No.4
No.5
No.6
No.3
No.4
No.5
No.6
No.1
No.2
No.2
No.4
No.3
CDE9057
CDE9062
CDE9063
CDE9071
CDE9070
CDE9074
V-12
MUTE
PRIMARY
!
!
CWH1517
AKP1126
CTT1158:(J)
CTT1159:(U)
CTT1160:(Y5)
CTT1158:(J)
CTT1159:(U)
CTT1160:(Y5)
CTT1161:(J)
CTT1162:(U)
CTT1163:(Y5)
CDX1012:(J)
CDX1013:(U),(Y5)
!
!
!
CSH1076
!
CDE9058
!
!
!
CWH1517:(J)
PRIMARY
CWH1518:(U)
CWH1519:(Y5)
R601
R602
RY601
RY603
RY602
RY604
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!! ! !
!!
!!
V-55
GNDA
V+55
VOLTAGE CHECK
!
!
PRIMARY
CENTER N
CENTER P
CENTER P
CENTER N
CDE9094
CDE9096
CDE90
1
2
3
KN102
VNF1084
VAC2A
VAC1B
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1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
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11
TAD-M600
56 7 8
56 7 8
A
B
C
D
E
F
WER AMP UNIT
H1516)
PROTECTION
UNIT
(CWH1521)
LED1 UNIT
(CWH1522)
LED2 UNIT
(CWH1523)
-
When ordering service parts, be sure to refer to "EXPLODED VIEWS and
PARTS LIST" or "PCB PARTS LIST".
-
The >mark found on some component parts indicates the importance of
the safety factor of the part.
Therefore, when replacing, be sure to use parts of identical designation.
-
: The power supply is shown with the marked box.
V+B
V-B
V+55
V-55
GNDA
GNDA
V-B
V+B
GNDA
GNDA
V+B
V-B
CN452
CDE9088
1
2
3
4
CN402
CDE9087
1
2
3
4
CN493
CDE9086
1
2
TH490
Q401
2SC3519A
Q461
2SC3519A
Q455
2SC3519A
Q459
2SC3519A
Q457
2SC3519A
Q453
2SC3519A
Q403
2SC3519A
Q411
2SC3519A
Q405
2SC3519A
Q409
2SC3519A
Q407
2SC3519A
Q454
2SA1386A
Q456
2SA1386A
Q408
2SA1386A
Q462
2SA1386A
Q460
2SA1386A
Q404
2SA1386A
Q406
2SA1386A
Q458
2SA1386A
Q412
2SA1386A
Q410
2SA1386A
Q402
2SA1386A
Q491
2SC4883A
Q492
2SC4883A
Q451
2SC3519A
KN403
CND5464
1
KN402
CND5464
1
KN404
CND5464
1
KN591
CND5464
1
KN592
CND5464
1
CN505
CDE9080
1
2
3
4
5
6
7
8
9
CN507
B7B-EH
1
2
3
4
5
6
7
CN503
B2B-EH
1
2
CN501
B4B-EH
1
2
3
4
CN502
B4B-EH
1
2
3
4
KN353
CND5464
1
KN354
CND5464
1
06
06
J301
CDE9059
1
2
3
30A20
353
2
2
KSH30A20
D354
1
1
2
2
11
KN401
CDE9078
1
KN451
CDE9079
1
KN593
CDE9082
1
KN594
CDE9083
1
CN351
CKS6111
1
2
B6B-EH
CN701
1
2
3
4
5
6
CN702
B4B-EH
1
2
3
4
CN701
CDE9081
1
2
3
4
11
CN504
CDE9090
1
2
3
Q452
2SA1386A
1
2
3
PROTECT+B2
-12V-B2
GNDS
OPE+A1
OPE-A1
GNDS
OPE+B1
OPE-B1
GNDS
V+12
GNDP
V-12V
V-12U
GNDS
PRT LT
GNDS
GND
POSI
OVLD DCT+P
OVLD DCT-P
AMPOUT P
GNDA
OVLD DCT+N
OVLD DCT-N
AMPOUT N
GNDA
+
+
+
+
OVLD+P
OVLD-P
AMPOUT P
GNDA
AMPOUT N
OVLD-N
OVLD+N
GNDA
+B
GNDA
-B
POSI
GND
V+B
V-B
V-55
GNDA
V+55
+SP OUT A
-SP OUT A
SP OUT N
SP OUT P
GNDA
OPE+B1
OPE-B1
-12V-B2
OPE+A1
OPE-A1
PROTECT+B2
PROTECTION
CONT.-12V
OPERATION
-12V
CDE9060
CDE9067
CDE9061
CDE9068
CDE9062
CDE9063
CDE9066
CDE9069
-SP OUT B
+SP OUT B
CDE9084
CDE9085
V-12
MUTE
GNDS
C1 C3
C2 C4
PROTECTION
CONT.-12V
OPERATION
-12V
CDE9092
CDE9093
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!!
!
!
!
GNDA
V+55
LTAGE CHECK
!
!
PTFM04BD471Q2N34B0
CKE1072
CKE1072
CKE1073
CKE1073
CCH1954
CCH1954
CND5309
CDE9094
CDE9096
CDE9091
GRAND PLATE
CCH1970
CCH1970
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TEL 13942296513 QQ 376315150 892498299
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12 TAD-M600
12 3 4
A
B
C
D
E
F
12 3 4
4.2 OVERALL BLOCK DIAGRAM
PRIMARY UNIT
(CWH1518: U)
(CWH1519: Y5)
CTT1159: U
CTT1160: Y5
CTT1162: U
CTT1163: Y5
CDX1013: U, Y5
AC CABLE
ADG7061: U
ADG7062: Y5
VOLTAGE AMP UNIT
(CWH1515)
POWER AMP UNIT
(CWH1516) PROTECTION UNIT
(CWH1521)
LED 1 UNIT
(CWH1522)
LED 2 UNIT
(CWH1523)
REGULATOR UNIT
(CWH1520)
INPUT 2
1
3
SP OUTPUT
T1, T2
T1
T2
T3
To POWER AMP +44V
T1 No.4
T2 No.3
To POWER AMP -44V
C1
C1: CCH1954
C2: CCH1970
C3: CCH1954
C4: CCH1970
C3
C2 C4
33000uF×4 INLET
+55V
To VOLTAGE AMP GND
POWER SW
CSH1076
-55V
To PROTECTION+15V
To PROTECTION-15V
30dB
30dB
0dB
0dB
PROTECTIONRY
FU1
AC RY SURGE KILLER
FU2
AC RY SURGE KILLER
FU3
3
4
3
4
5
6
6
5
1
1
2
2
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TEL 13942296513 QQ 376315150 892498299
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13
TAD-M600
56 7 8
56 7 8
A
B
C
D
E
F
5. DIAGNOSIS
5.1 TROUBLESHOOTING
No power
The FU3 fuse is open.
Short-circuiting of the
primary-side circuit of
the sub transformer.
Defective rectifier diode
(D651) of the secondary
side circuit of the sub-
transformer.
Defective power electro-
lytic capacitor (C653,
C654, C659, C660, etc.).
The ±15-Vregulator
of the subtransformer
is defective.
The P-651 microfuse
is open.
The ±15-Vregulator,
rectifier diode, power
electrolytic capacitor,
or 3-terminal REG is
defective.
No fuse (FU1, FU2,
FU3) is open.
P-301 and P-302
are open because of
a defective regulator.
Short-circuiting of terminals
of any of or several power
transistors (Q401-Q412 and
Q451-Q462) at the output stage.
Short-circuiting of any
of or several rectifier
diodes (D351, D352,
D353, D354).
Short-circuiting
between the +B/-B line
and GND or +B and -B.
Defective power transistors
at the output stage.
Defective bias circuit at the
voltage AMP block.
Defective rectifier
diode(s).
Power line in contact
with the chassis, or
defective power
electrolytic capacitor
(C1, C2, C3, C4).
Short-circuiting of the
primary-side circuit of
the main transformer.
Defective line input
connector or loose
line output connection.
Defective MUTE
RY Drive circuit in
the Protection block.
Disconnected
connectors in
the Protection
block.
DC is output
because of defective
parts in the voltage
AMP block or short-
circuiting.
Check if DC is output.
If any of or several
LEDs (D103, D104,
D203, D204) in the
circuit are not lit,
defective part(s) or
short-circuiting exists.
If any of or several
LEDs (D303-D308)
in the circuit are
not lit, defective
part(s) or short-
circuiting exists.
The SP cable at
the output end is in
contact with the
chassis.
Check for over
current.
The temperature of
the heat sink is
abnormally high.
Check if the vent is
obstructed, etc.
Power is on but no sound.
The LED remains lit in red. The LED is lit in yellow.
Short-circuiting of D301
and D302, defective
C301/C302, Q301/Q302,
C309/C310, etc.
Point to be checked
Defective AC
RY Drive circuit
in the primary
block.
Abnormality caused
by a defective part
in the Protection
block, each detection
block, or RY Drive
circuit or short-
circuiting.
Either FU1 or FU2
fuse or both are open.
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2
2
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1
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Q
TEL 13942296513 QQ 376315150 892498299
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14 TAD-M600
12 3 4
A
B
C
D
E
F
12 3 4
5.2 CIRCUIT DESCRIPTION
This circuit is a voltage amplifier stage of 30-dB gain.
The input block (Q101, Q102, Q103, and Q104) is a buffer
amplifier. A current mirror circuit has been adopted as a constant
current circuit. Operating it on constant current reduces any
influence of temperature drift. A diamond buffer circuit is
constructed by cross-connecting this circuit and the initial stage of
the amplifier section.
The signal voltage attribute that is input to the initial stage (Q107,
Q108, Q109, and Q110) of the amplifier section is converted to
current via the current mirror circuit (Q113 <=> Q115, Q114 <=>
Q116). A Wilson Mirror circuit has been adopted as a current mirror
circuit, for higher accuracy.
The V/I converted current attribute is converted to voltage with the
aid of the input impedance of the SEPP circuit at the output buffer
(Q121, Q122) then output.
To improve the high-frequency characteristics, a cascode bootstrap
configuration (Q111, D101, Q112, and D102) at the initial stage
improves the high-frequency characteristics.
The negative feedback (NFB) is applied from the output stage to
the βcircuit that consists of R145, R146, and R147. When the
feedback is applied to the emitter that is located at the initial stage
of the amplifier section, where the impedance is low, the NFB
current flows and serves as the current feedback.
As described above, a high-accuracy circuit is adopted in each
part, and a simple configuration is adopted in which the voltage
attribute is converted to current then reconverted to voltage in one
stage. Combined with a current feedback configuration, all these
features achieve a highly stable amplifier.
V+55
CN104
B4B-EH
1
2
3
4
C101
220p/125V
AMCH
C105
10p 500V
DM
C107
10p 500V
DM
C108
10P 500V
DM
C106
10p 125V
DM
D106
HZ4CLL
D102
HZ15-2L
Q121
2SC4883A(Y)
Q122
-55V
2SA1859A(Y)
R138
100 1/2W
R137
100 1/2W
R134
220 1/2W
R133
220 1/2W
Q109
2SC2240(BL)
Q107
2SC2240(BL)
2SA970(BL)
Q108
Q110
Q112
2SA970(BL)
Q111
2SC2240(BL) 2SA970(BL)
Q115
2SA970(BL)
2SA970(BL)
2SA1145(OY)
Q119
Q120
2SC2705(OY)
Q118
2SC2240(BL)
Q116
2SC2240(BL)
Q114
2SC2240(BL)
D101
HZ15-2L
2SA970(BL)
R117
100 1/4W
R118
100 1/4W R126
100 1/4W
R125
100 1/4W
R127
33k 1/4W
R128
33k 1/4W
R129
3.9k 1/4W
R131
2.2k 1/4W
R130
1k 1/4W
Q103
2SA970(BL)
Q101
2SA970(BL)
Q104
2SC2240(BL)
Q102
2SC2240(BL)
Q106
2SC2240(BL)
Q105
Q113
2SA970(BL)
C111
100/50
C112
100/50
C110
100/50
C109
100/50
D105
HZ5CLL
R144
330 1/4W
C115
100p 125V
AMCH
C116
100p 125v
AMCH
C114
100/50
UKZ
R123
330 1/4W
C113
2.2/250
C121
2.2/250
C122
2.2/250
C117
0.47/250
2SA970(BL) R151
Q125
Q117
330 1/4W
Q126
2SC2240(BL)
R152
330 1/4W
VR101
5K
13
2
VR102
200
13
2
D103
SLI-343URC
D104
SLI-343URC
R109
15k 1/2W
R110
15k 1/2W
C127
2200p/125V
AMCH
C129C125
R108
330 1/4W
R107
330 1/4W
R105
10k 1/4W
R111
10k 1/4W
R112
10k 1/4W
R124
R102
R106
10k 1/4W
R119
100k 1/4W
R120
100k 1/4W
R153
100 1/4W
R154
100 1/4W
R103
1k 1/4W
AMRS
R104
R101
1k 1/4W
AMRS
R115
270 1/4W
AMRS
R116
220 1/4W
AMRS
R113
47 1/4W
AMRS
R114
47 1/4W
AMRS
R121
AMRS
100 1/4W
R122
AMRS
100 1/4W
R146
750 1W
CM1
R145
750 1W
CM1
R147
CM1
47 1W
VOLTAGE AMP UNIT
IDOLE ADJ
DC ADJ
TO POWER AMP ASSY
!
!
!
!
!
!
TR-E N
TR-B N
TR-C N
GNDS
+55V
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Q
TEL 13942296513 QQ 376315150 892498299
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15
TAD-M600
56 7 8
56 7 8
A
B
C
D
E
F
This circuit amplifies power. A three-stage Darlington structure is
adopted, which includes the output SEPP at the voltage amplifier
stage, driver stage (Q401, Q402), and final stage (Q403-Q412),
which has 5-parallel push-pull composition.
All these allow driving of 600-W, 4-ohm output speakers without
difficulty.
This circuit belongs to the AB class, with total idle current of 0.5 A
(a product with power output up to 2 W belongs to the A class).
This is a basic feedback-type constant-voltage circuit.
The forward voltage (Vf) of the LEDs (D303, D305, D307 [D304,
D306, D308]) is used as the reference voltage, which is 5.4 V(1.8
V× 3).
To suppress the influence of power fluctuations, a current mirror
circuit (constant current circuit) that constituts of Q307-D309
(Q308-D310) is used. Adjust the output voltage (VR301, VR302) to
±55 V.
FSF10A20
D401
12
C403
0.47/250V
R404
10 1W
R403
10 1W
R402
10 1/2W
FSF10A20
D402
12
R401
10 1/2W
C401
470p/125V
AMCH
C402
470p/125V
AMCH
Q401
2SC3519A
Q402
2SA1386A
R424
CCN1271-A
R409
4.7 1/2W
R412
4.7 1/2W
R434
120 1/2W
Q408
2SA1386A
R435
120 1/2W
R413
4.7 1/2W
Q405
2SC3519A
R433
120 1/2W
Q407
2SC3519A Q411
2SC3519A
Q406
2SA1386A
R423
0.22 5W
R421
0.22 5W
R422
0.22 5W
R411
4.7 1/2W
R410
4.7 1/2W
R408
4.7 1/2W Q412
2SA1386A
R407
4.7 1/2W
R436
120 1/2W
R431
120 1/2W
R438
120 1/2W
R425
0.22 5W
Q410
2SA1386A
R414
4.7 1/2W
Q409
2SC3519A
R437
120 1/2W
R420
0.22 5W
R432
120 1/2W
R426
0.22 5W
R419
0.22 5W
CN401
POWER AMP UNIT
CDE9073-A
1
2
3
4
R418
0.22 5W
R405
4.7 1/2W
Q403
2SC3519A
Q404
2SA1386A
R417
0.22 5W
R406
4.7 1/2W
R429
120 1/2W
R430
120 1/2W
C407
1u/100
C408
1u/100
From Voltage Amp
+OUT N
-OUT N
NFB N
!
!
!
!
!
!
!
!
!
!
!
!
!
!!
!
!!
!
!
!
!
!
!
!
!
!
!
!
!
!
Center N
!
!
!
!
!
!
+B
-B
OUT
REGULATOR UNIT
+55V
GND
-55V
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Q
Q
TEL 13942296513 QQ 376315150 892498299
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16 TAD-M600
12 3 4
A
B
C
D
E
F
12 3 4
V-12U
GNDP
GNDS
V+12V
V-12V
GNDS
Q551
Q553
DTC143ES
Q521
2SC2240(BL)
Q523
Q524 2SC2240(BL)
Q503
Q504
2SC2240(BL)
Q552
2SC2240(BL)
Q501
2SC2240(BL)
Q542
2SC2240(BL)
Q505
2SC2240(BL)
Q541
2SC2240(BL)
D503
1SS133
D522
1SS133
D502
1SS133
D524
1SS133
D504
1SS133
D501
1SS133
D523
1SS133
D521
1SS133
R528
220k
R501
AMRS
560 1/4W
R529
47k
R509
47k
R522
AMRS
560 1/4W
R502
AMRS
560 1/4W
R508
220k
R521
AMRS
560 1/4W
R503
10k
R504
10k
R524
10k
R523
10k
R527
2.2k
R507
2.2k
R512
1.2k
C541
NM
R542
22k
R543
5.6k
R545
2.2k
C552
0.01u/50 C551
0.022u/50
MTF
R553
1.2k
R552
2.2k
R551
4.7k
R554
4.7k
R555
4.7k
R556
1.2k
C503
33u/25
C524
33u/25
C523
33u/25
C504
33u/25
2SA970(BL)
2SA970(BL)
Q522
2SA970(BL)
Q502
2SA970(BL)
2SA970(BL)
R541
6.8k
R544
2.7k
CN503
B2B-EH
1
2
CN501
B4B-EH
1
2
3
4
CN502
B4B-EH
1
2
3
4
CN507
B7B-EH
1
2
3
4
5
6
7
R510
470
R511
470
R531
470
R530
470
C531
100u 25V
C532
100u 25V
GNDA
GNDP
C505
220p
GNDA
C501
2.2u 50V
C521
2.2u 50V
C502
2.2u 50V
C522
2.2u 50V
D559
1SS133
D560
1SS133
D561 1SS133
D562 1SS133
D563
1SS133
D564
1SS133
D565
1SS133
D566
1SS133
R513
100k
R533
100k
R514
100k
R534
100k
D507
1SS133
D527
1SS133
D508
1SS133
D528
1SS133
OVLD DCT+N
OVLD DCT-N
AMP OUT N
POSISTOR
PROTECTION UNIT
GNDS
GNDA
OVLD DCT+P
OVLD DCT-P
AMP OUT P
GNDA
PRT LT
GNDS
GND
V+12
V-12
V-12U
To PowerAMP A'ssy
From PRI A'ssy
To PowerAMP A'ssy
To PowerAMP A'ssy
!
!
Overcurrent detection
Each of Q501, Q502, Q521, and Q522 is an overcurrent detection
transistor. For example, in the case of Q501, bridge detection by
R501, R503, emitter resistor (0.22 ohm ÷ 5 [parallel push-pull
circuits] = 0.044 ohm), and load is performed.
If the bridge becomes out of balance, the transistor is turned on
and the protection function is activated (speaker relay: OFF, main
power: OFF).
DC detection
DC detection transistors are Q503-Q504 and Q523-Q524.
The low-pass filter (R508-C503 and C504 [R528-C523 and C524])
cuts the AC component.
If current higher than that determined by a ratio of resistance
values of R508and R509 flows and the DC component reaches
about 3 V, the transistor is turned on and the protection function is
activated (speaker relay: OFF, main power: OFF).
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
17
TAD-M600
56 7 8
56 7 8
A
B
C
D
E
F
1.0u/50
C555
D555
11EQS10
D556
11EQS10
D551
HZ18L-1
D554
HZ18L-1
Q566
DTC143ES
Q565
DTC143ES
R575
820(1/2W)
R574
470(1/2W)
R573
470(1/2W)
R577
15k
Q564
2SA970(BL)
Q563
Q562
2SA965(OY)
2SA965(OY)
Q561
2SA970(BL)
Q556
2SC2235(OY)
Q555
2SC2235(OY)
Q554
DTC114ES
Q558
2SC2240(BL)
Q557
2SC2240(BL)
Q559
2SC2240(BL)
Q560
2SC2240(BL)
D552
1SS133
D553
1SS133
R557
4.7k
R558
56k
R559
12k
R560
8.2k
R561
330k
R562
100
R563
4.7k
R564
5.6k
R565
4.7k
R566
5.6k
R569
1k
R568
47 R567
5.6k
R576
27k
R571
120k
R572
68k
R570
10k
R582
3.9k
Q581
2SC2240(BL)
R581
22k
4.7u/50
C581
KN591
CND5464-A
1
R583
22k
KN592
CND5464-A
1
ACH1480-A
C554
100u 25V
ACH1482-A
C553
220u 25V
C556
0.01u/50
MTF(CFTNA)
C557
0.01u/50
MTF(CFTNA)
CN593
CDE9082-A CN594
CDE9083-A
CSR1033-A
RY595
1
23
4
CSR1033-A
RY594
1
23
4
CSR1033-A
RY596
1
23
4
CSR1033-A
RY592
1
23
4
CSR1033-A
RY593
1
23
44
CSR1033-A
RY591
1
23
4
C559
0.01u/50
D557
11EQS10
D558
11EQS10
C558
0.01u/50
CN504
CDE9090-A
1
2
3
CN505
CDE9080-A
1
2
3
4
5
6
7
8
9
OPRATION +A1
-12V -A1
GNDS
GNDS
GNDS
OPRATION +B1
-12V -B1
-12V -B2
PROTECT +B2
MUTE
V-12
GNDS
To SP+ Terminal
To SP- Terminal
From Power Amp P
From Power Amp N
Temperature detection
If the temperature rises, the resistance value of the positive
thermistor (TH490) mounted on the heat sink also rises.
When the temperature reaches about 95 °C, Q541 is set to ONand
the illumination on the front panel turns red.
NOTE: Under such circumstances, the protection function is not
activated.)
If the temperature continues to rise and exceeds about 100 °C,
Q542 is set to ONand the protection function is activated (speaker
relay: OFF, main power: OFF).
For more details on the protection functions, see the descriptions
below.
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
18 TAD-M600
12 3 4
A
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F
12 3 4
Detailed Descriptions on the Protection Functions
Power-ONmuting function
• When power is set to ON, signal muting is activated for about 8seconds, resulting in no sound. While muting is activated,
the red LEDs are lit.
• After signal muting is released, the red LEDs go dark, the white LEDs light, and sound is output.
Power-ONsurge killer function
• The surge killer circuit is activated for about 2 seconds after the power is set to ONto minimize the inrush current of AC
power.
• When the surge killer function is released, sound of a relay operation may be output.
Overload-detection function
• The overload-detection circuit is instantly (within about 20 msec) activated when the impedance of the speaker that is
connected to the load drops to less than 2 ohms, and if the output terminals are short-circuited or the output value becomes
larger than the preset value.
• While this function is activated, the white LEDs go dark and the red LEDs light.
• To release this function, turn the unit off and check and correct overload status of the speaker or short-circuiting of the
output terminals. Then turn the unit back on again.
Output DC detection function
• If DC voltage of 3 Vor higher is generated at the output for some reason (when DC is input while DC is output from the
preamplifier, failure in an internal part of the amplifier itself, etc.), the output DC detection circuit is activated.
• While this function is activated, the white LEDs go dark and the red LEDs light.
• To release this function, if DC output from the preamplifier is the cause, turn the unit off, connect the AC power, then turn the
unit back on again.
• If failure in an internal part of the amplifier is suspected, repair it.
Temperature-detection function
• If there are continuous outputs larger than the upper limit expected from low-load output, or when the ambient temperature
is high, the temperature of the heat sink is detected and the protection function will be activated.
• The temperature-detection function is activated in two steps, as described below.
• In the first step, if the temperature exceeds a preset temperature (90-95 ºC), the white LEDs go dark and the red LEDs light
to warn that the internal temperature of the amplifier is abnormally high, but sound continues to be output.
• In the second step, if the temperature exceeds another preset temperature (a preset temperature of the first step plus about
100 ºC), the output is shut off and sound will not be output.
• If the first detection step is activated, lower the output level and the ambient temperature. If the red LEDs go dark and the
white LEDs light, the amplifier can be used normally afterwards.
• If the second detection step is activated, turn the unit off. Let it cool down for several dozen minutes and lower the ambient
temperature and the amplifier output level before turning it back on again.
Power-OFF muting function
• In order to prevent noise from being output when the unit is turned off, output will be instantly (within about 20 msec) shut off
and muted.
• In such circumstances, the LEDs go dark when muting is activated.
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
19
TAD-M600
56 7 8
56 7 8
A
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C
D
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F
6. SERVICE MODE
There is no information to be shown in this chapter.
Detailed Descriptions on the Protection Operations
Power-ONmuting operation
• The voltages at R558and C553 of the time-constant circuit are compared with the reference voltage at the difference
amplifiers, and muting will be released when those voltages exceed the threshold levels.
Two difference amplifiers are provided, with the slightly different threshold levels (approx. 50 mV= R568voltage drop,
50 ms). The output relay is first set to ONthen the input relay is set to ON.
Power-ONsurge killer operation
• When the voltages at R686 and C682 of the time constant circuit exceed approx. 7.2 V(-12 + D551 + 1.2), Q682 and Q683
are set to ON, the relay of the surge killer circuit is activated, and the surge killer resister is short-circuited.
• When the unit is turned off, Q681 is set to ON, Q682 and Q683 are set to OFF, and the relay of the surge killer circuit is
released.
Overload-detection operation
• The overload status (approx. 0.5 ohm or less) on the + side is detected at Q501 and Q521, and that on the - side is detected
at Q502 and Q522. Detection of an abnormality is retained via the latch circuit that consists of Q552 and Q553.
Then Q554 together with Q555 is set to ON, C553 is rapidly discharged, the subsequent differential circuit and output/input
relays at the relay drive circuit are activated, then signals are set to OFF.
• The white LEDs go dark when Q563 is set to OFF, and the red LEDs light when Q564 is set to ON.
• To prevent arc discharge when the output relay is set to OFF, approx. 4-ms time-constant circuits are provided with the C555
and R565 circuits so that the output relay is activated later than the input relay.
Output DC detection operation
• Audio signals are eliminated at the LPF that consists of R508, R509, C503, C504, and R528, R529, C523 and C524, and +
DC output level is detected at Q503 (Q523) and - DC output level is detected at Q504 (Q524). Detection of an abnormality is
retained via the latch circuit that consists of Q552 and Q553. The same operations as those for overload detection will then
follow.
• The detection levels are Approx. Vbe*(R509/(R508+ R509)).
• The formula for the equivalent cutoff frequency of the LPF is as follows: Frequency determined by (R508(R528)//R509
(R529)) and (C503 (C523)/2) multiplied by (output peak voltage/detection level), given that C503 (C523) = C504 (C524).
Temperature-detection operation
• For temperature detection, use a TH490=PTFM04BD471Q2N34B0 (100 ºC) type Posistor from Murata Manufacturing that
can be secured to the heat sink with screws. The characteristics of this thermistor are as follows: at 80 ºC, typical 100 ohms
or less; at 90 ºC, 330 ohms or less (typ. 100 ohms); at 100 ºC, 470 ohms or higher (typ. approx. 1.5 k-ohms).
• In the first detection step, when the resistance value at the Posistor becomes 400 ohms or higher at a preset temperature of
90-95 ºC, Q541 is set to ON, Q565 is set to OFF, and the white LEDs go dark. Instead, Q564 is set to ONand the red LEDs
light.
• In the second detection step, when the resistance value at the Posistor becomes 1.4 k-ohms or higher at a preset
temperature of approx. 100 ºC, Q542 is set to ON. Detection of the abnormality is retained via the latch circuit that consists
of Q552 and Q553. The same operations as those for overload detection will then follow.
• If the first detection step is activated, lower the output level and the ambient temperature. Q541 will be turned OFF, the red
LEDs will go dark, and the white LEDs will light.
Power-OFF muting operation
• At the - voltage rectifier circuit with a small time constant that consists of D654, D655, C661, R652, D656, C662 and R653,
negative voltage is discharged for approx. 15 ms when the unit is turned OFF, Q556 is turned ON, and C553 is discharged in
the route of R562. Then the input relay (Q556) to which the differential amplifier is directly connected is first released.
Then the output relay is released slightly after the input relay when the electric potential at R562 has decreased.
• The current to be fed to the red LEDs is absorbed at Q566 and the red LEDs go dark approximately at the same time as the
input relay is turned off.
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
20 TAD-M600
12 3 4
A
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12 3 4
7. DISASSEMBLY
[1] Exterior Section
1
1
2
2
Panel
Panel
Note:
Even if the unit shown in the photos and illustrations in this manual may differ from your product, the procedures
described here are common.
• Be careful not to scratch or stain the cabinet during servicing, because it may cause a serious complaint.
• As the product weighs 90 kg, be fully careful when handling it. Four people are required when moving it.
• Be careful of the order of wire arrangement at a place where several wires are secured together with a screw (on the power
main electrolytic capacitor, etc.), as this can affect the sound quality. Follow the detailed procedure described in this section.
• As the product has conical feet, be very careful not to scratch floor surfaces in the customer’ s home.
(1) Remove the nine screws. (BMZ40P140FCC)
(2) Remove the panel.
(3) Release the jumper wires, as required.
[1-1] Panel (Rear)
(1) Remove the eight screws. (CBA2215)
(2) Remove the panel.
[1-2] Panel (Top)
×9
×4
1×4
Disassembly
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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