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DIGITAL POWER AMPLIFIER
MX-D1
SERVICE MANUAL
IMPORTANT NOTICE
This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.
It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already
known and understood by the users, and have therefore not been restated.
WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personal
injury, destruction of expensive components, and failure of the product to perform as specified. For these reasons,
we advise all YAMAHA product owners that any service required should be performed by an authorized
YAMAHA Retailer or the appointed service representative.
IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization, certification or
recognition of any applicable technical capabilities, or establish a principle-agent relationship of any form.
The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and
service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore, inevitable
and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please
contact the distributor's Service Division.
WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may have
accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss).
IMPORTANT: Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit.
I CONTENTS
TO SERVICE PERSONNEL ...................................... 2~3 PROTECTION INFORMATION /
FRONT PANEL .............................................................. 4 17~18
REAR PANELS .......................................................... 4~5 IC DATA ................................................................. 19~21
SPECIFICATIONS .......................................................... 6 BLOCK DIAGRAM ................................................. 22~23
INTERNAL VIEW ........................................................... 7 PRINTED CIRCUIT BOARD .................................. 24~33
SERVICE PRECAUTIONS / 8~10 PIN CONNECTION DIAGRAM .................................... 34
DISASSEMBLY PROCEDURES / ........... 11~14 SCHEMATIC DIAGRAM ........................................ 35~37
TROUBLE SHOOTING / 15~16 PARTS LIST ........................................................... 39~54
MX-D1
100869
P.O.Box 1, Hamamatsu, Japan
MX-D1
I TO SERVICE PERSONNEL
1. Critical Components Information
AC LEAKAGE
Components having special characteristics are marked s and WALL EQUIPMENT TESTER OR
must be replaced with parts having specifications equal to those OUTLET UNDER TEST EQUIVALENT
originally installed.
2. Leakage Current Measurement (For 120V Models Only)
When service has been completed, it is imperative to verify
that all exposed conductive surfaces are properly insulated INSULATING
TABLE
from supply circuits.
G Meter impedance should be equivalent to 1500 ohm shunted G Leakage current must not exceed 0.5mA.
by 0.15µF. G Be sure to test for leakage with the AC plug in both polarities.
"CAUTION"
"F501: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 20A,
250V FUSE."
CAUTION
F501: REPLACE WITH SAME TYPE 20A, 250V FUSE.
ATTENTION
F501: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 20A, 250V.
WARNING: CHEMICAL CONTENT NOTICE!
The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (where
applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and
possibly other entities) to cause cancer and/or birth defects or other reproductive harm.
DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REA-
SON WHATSOEVER!
Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose
eyes to solder/flux vapor!
If you come in contact with solder or components located inside the enclosure of this product, wash your hands before
handling food.
MX-D1
2
MX-D1
About lead-free solder /
The foil side of all P.C.B.s used for this product are soldered
with lead-free soldering material which is an alloy of
Sn+Ag+Cu (tin + silver + copper).
However, the surface mount devices on the component side
of the MAIN P.C.B. and OPERATION P.C.B. are soldered
with the lead solder.
Among some types of lead-free solder currently available,
it is recommended to use one of the following types for the
repair work.
· Sn + Ag + Cu (tin + silver + copper)
· Sn + Cu (tin + copper)
· Sn + Zn + Bi (tin + zinc + bismuth)
Caution:
1. As the melting point temperature of the lead-free solder
is about 30°C to 40°C (50°F to 70°F) higher than that of
the lead solder, be sure to use a soldering iron suitable
to each solder.
2. If lead solder must be used, be sure to remove lead-
free solder from each terminal section of the parts to be
replaced and from the area around it completely before
soldering, or make sure that the lead-free solder and
lead solder melt together fully.
DIMENSIONS /
(1-5/16")
34
401 (15-13/16")
(2-3/8") (1/16") 437 (17-3/16")
2
MX-D1
60
75 (2-15/16")
435 (17-1/8")
(9/16")
15
Unit : mm (inch)
3
MX-D1
I FRONT PANEL
I REAR PANELS
U, C models
Cover
A model
MX-D1
4
MX-D1
B, G models
T model
K model
J model
MX-D1
5
MX-D1
I SPECIFICATIONS
Minimum RMS Output Power / Power Supply
(1 kHz, 1% THD) U, C models ...................................... AC 120 V, 60 Hz
U, C models (8 ohms) ......................... 500 W + 500 W A model ............................................. AC 240 V, 50 Hz
A, B, G, T, K, J models (4 ohms to 8 ohms) ... 500 W + 500 W B, G models ...................................... AC 230 V, 50 Hz
T model ............................................. AC 220 V, 50 Hz
Dynamic Power Per Channel (IHF)
K model ............................................. AC 220 V, 60 Hz
8/6/4/2 ohms ............................. 700/850/1000/1000 W
J model .......................................... AC 100V, 50/60 Hz
Dynamic Headroom
Power Consumption
8/6/4 ohms .............................................. 1.5/2.3/3.0 dB
U, C models ....................................................... 350 W
Damping Factor A, B, G, T, K models .......................................... 350 W
1 kHz, 8 ohms ....................................... more than 200 J model ............................................................... 350 W
Input Sensitivity / Input Impedance Standby Power Consumption (Reference Data)
UNBALANCE ................................... 1.3 V / 25 k-ohms ............................................................. less than 0.1 W
BALANCE ......................................... 2.2 V / 10 k-ohms
Dimensions (W x H x D)
Frequency Response ..... 435 x 75 x 437 mm (17-1/8" x 2-15/16" x 17-3/16")
1 Hz to 100 kHz ............................................... ± 3.0 dB
Weight
10 Hz to 20 kHz ............................................... ± 0.5 dB
................................................. 10.4 kg (22 lbs. 15 oz.)
Total Harmonic Distortion
Accessories
(1 kHz, 10 W/ 8 ohms, 20 kHz LPF)
Power Cable x 1
UNBALANCE .................................. less than 0.002 %
Clamp Filter with Fixing Tie (for Power Cable) x 2
BALANCE ........................................ less than 0.002 %
Clamp Filter (for RS-232C Interface Cable) x 1
Signal to Noise Ratio (IHF-A network) Clamp Filter (for Control Cable) x 2 [U, C models]
(Input shorted, 20 kHz LPF) Clamp Filter (for Audio Pin Cable) x 1 [U, C models]
UNBALANCE .................................. more than 120 dB
BALANCE ........................................ more than 120 dB
* Specifications are subject to change without notice due
Channel Separation to product improvements.
(Input 5.1 k-ohms shorted, 1 kHz)
UNBALANCE .................................. more than 100 dB
BALANCE ........................................ more than 100 dB
U ........ U.S.A. model C .... Canadian model
Muting
A ........ Australian model B ..... British model
.................................................................................. -
G ........ European model T ..... Chinese model
K ........ Korean model J ..... Japanese model
MX-D1
6
MX-D1
I INTERNAL VIEW
1 2 34 5 6 7
1 FUNCTION (1) P.C.B.
2 FUNCTION (4) P.C.B.
3 FUNCTION (3) P.C.B.
4 FUNCTION (6) P.C.B.
5 FUNCTION (2) P.C.B.
6 FUNCTION (7) P.C.B.
7 FUNCTION (5) P.C.B.
8 MAIN (R) P.C.B.
9 OPERATION (1) P.C.B.
0 OPERATION (2) P.C.B.
A MAIN (L) P.C.B.
A 0 9 8
MX-D1
7
MX-D1
I SERVICE PRECAUTIONS
1. Safety measures
· Some internal parts in this product contain high voltages
and are dangerous. Be sure to take safety measures
during servicing, such as wearing insulating gloves.
· Note that C196, C197, C198, C199, C222 and C223
are dangerous even after the power is turned off because
an electric charge remains and a high voltage continues
to exist there.
Before starting the service work, connect discharging
resistors (5 k-ohms/10 W) to the terminals indicated in
the figure below to discharge electricity. The time
required for discharging is about 30 seconds. (at 4
locations for Lch and Rch, each)
MAIN P.C.B.
IC129
5 k-ohms
10W C217
TP304
C223
TP303
TP302
R272 C199
5 k-ohms T101
C222
10W
C197
C196 C198
5 k-ohms 5 k-ohms
10W 10W
TP301
C191 C190
D134 D139
D135 D138
D137 D136
MX-D1
8
MX-D1
5 k-ohms
10W
5 k-ohms
10W
5 k-ohms
10W
5 k-ohms
10W
2. Precautions for connection of measuring
instrument
The structure of this product is twin-monaural type. Connect
the measuring instrument to the Lch side GND when taking
MX-D1
measurements on the Lch side and to the Rch side GND
when taking measurements on the Rch side.
Note: The GND is commonly used for Lch and Rch at the
screw terminal of the FUNCTION P.C.B. (3).
9
MX-D1
3. Confirming insulation of FET
When the FETs (Q117 to Q120) of the MAIN P.C.B. were
removed, be sure to check using the tester that the metal
part of each FET itself is insulated from the FET mounting
screw after reinstalling them.
Heatsink/AMP
Q120 Q119
Q118
Q117
FET Mounting Screw
4. Confirming insulation between Heatsink/AMP
and chassis
When the Heatsink/AMP mounting screws were removed,
be sure to check using the tester that the Heatsink/AMP is
insulated from the Frame after reinstalling them.
Heatsink/AMP Mounting Screw
Frame
Heatsink/AMP
MX-D1
10
MX-D1
I DISASSEMBLY PROCEDURES
(Remove parts in the order as numbered.)
Disconnect the power cable from the AC outlet.
1. Removal of Bottom Cover
a. Spread a soft cloth and place the unit upside down on it.
b. Remove 11 screws (1) and then remove the Bottom 1
Cover. (Fig. 1)
2. Removal of Front Panel, Side Panels and Top
Panels 2 3
a. Remove 4 screws (2) and 3 screws (3). (Fig. 1) 4
b. Set the main unit with its top facing up and remove 4
screws (4). (Fig. 2)
c. Remove the Front Panel, Side Panel and Top Panel
together by sliding them toward the front. (Fig. 2)
Bottom Cover
1 1 1 1
Side Panel Top Panel Side Panel
3
2 4
4
Front Panel
Cloth
Fig. 1 Fig. 2
3. Discharging Capacitor
Refer to "SERVICE PRECAUTIONS" on page 8.
MX-D1
11
MX-D1
4. Removal of MAIN (R) P.C.B.
a. Remove 5 screws (5) and 5 screws (6). (Fig. 3) 5 6
b. Remove the connectors (CB101 to CB108) on the MAIN
(R) P.C.B. (Fig. 3)
c. Remove the MAIN (R) P.C.B. upward.
5. Removal of FUNCTION (1) P.C.B.
a. Remove 4 screws (7) and 5 screws (8). (Fig. 3) 7 8
b. Remove the connectors (CB504, CB505) on the
FUNCTION (1) P.C.B. (Fig. 3)
c. Remove the FUNCTION (1) P.C.B. upward.
6. Removal of MAIN (L) P.C.B.
a. Remove 5 screws (9), 6 screws (0) and 2 screws (A). 9 0 A
(Fig. 4)
b. Remove the connectors (CB101 to CB108) on the MAIN
(L) P.C.B. (Fig. 4)
c. Release the angle catching the MAIN (L) P.C.B. and
remove it upward.
MAIN (R) P.C.B.
CB106 MAIN (L) P.C.B. CB106
5 CB107
9 CB107
5 CB104 CB108
7 0
8
CB103 CB103
CB108
6 9
0
CB104
CB105
CB102 CB105
FUNCTION (1)
CB101 P.C.B.
A CB102
CB505 CB101
CB504
Fig. 3 Fig. 4
MX-D1
12
MX-D1
7. Removal of FUNCTION (5) P.C.B.
a. Remove 4 screws (B). (Fig. 5) B
b. Remove the FUNCTION (5) P.C.B. upward.
8. Removal of FUNCTION (4) P.C.B.
a. Remove 4 screws (C). (Fig. 5) C
b. Remove the FUNCTION (4) P.C.B. upward.
FUNCTION (5) P.C.B.
B
C
FUNCTION (4) P.C.B.
Fig. 5
When checking the P.C.B.:
· Put the Rubber Sheet and a Cloth over the equipment.
Then place the P.C.B. upright on the Cloth and check
it. (Fig. 6)
· Set the MAIN (L) P.C.B. upright using a non-
conductive support, such as wood. (Fig. 6)
· Reconnect all cables (connectors) that have been
disconnected.
· When the FUNCTION (2) P.C.B. and FUNCTION (3)
P.C.B. are removed from the chassis, they do not
work because their grounding are disconnected. Be
sure to connect the ground of FUNCTION (2) P.C.B.
and FUNCTION (3) P.C.B. to the chassis respectively
with a jumper wire or the like.
Non-conductive Support
MX-D1
Rubber Sheet and Cloth
Fig. 6
13
MX-D1
9. Removal of FUNCTION (2), (3), (6) and (7)
P.C.B.s
a. Remove the connector (CB101) on the MAIN (R) and
MAIN (L) P.C.B.s. (Fig. 7)
b. Remove the connectors (CB501, CB502) on the
FUNCTION (3) P.C.B. (Fig. 7)
c. Remove the connectors (CB701, CB702) on the
OPERATION (1) P.C.B. (Fig. 7) D
d. Remove 2 screws (D). (Fig. 7) E
e. Remove 11 screws (E). (Fig. 7)
f. Remove the Rear Panel rearward. F
g. Remove the nut (F) of the pin jack (UNBALANCE).
(Fig. 9)
Note: When removing the nut, cover it with cloth and
turn it with pliers so as not to cause damage to it.
(Fig. 8)
CB702 CB701 Pliers Cloth
MAIN (R) P.C.B. OPERATION (1) P.C.B.
CB101
CB502
D
CB501
D MAIN (L) P.C.B.
E CB101
E
E
FUNCTION (3) E
P.C.B. E
E
E Nut
Fig. 7 Fig. 8
h. Remove 1 screw (G). (Fig. 9) G
i. Remove the FUNCTION (3) P.C.B. upward.
j. Remove 1 screw (H) and 2 Lock Screws (I). (Fig. 9) H I
k. Remove the FUNCTION (2) P.C.B. upward.
l. Remove 2 screws (J). (Fig. 9) J
m. Remove the FUNCTION (6) P.C.B. upward.
n. Remove 2 screws (K). (Fig. 9) K
o. Remove the FUNCTION (7) P.C.B. upward.
FUNCTION (3) P.C.B.
FUNCTION (7) P.C.B.
FUNCTION (6) P.C.B.
MX-D1
K
I
G
F J
F H
Fig. 9
14 FUNCTION (2) P.C.B.
MX-D1
I TROUBLESHOOTING
No Power or Power Power on but no
shuts off immediately sound from SP
With the power turned Refer to "SERVICE With the power turned Refer to "SERVICE
off, discharge C196 PRECAUTIONS" off, discharge C196 PRECAUTIONS"
C199, C222 and C223 on page 8. C199, C222 and C223 on page 8.
Short circuit between YES Output coil (L101) YES Failure in Analog
Replace the
Drain and Source in FET 350 kHz pulse available? amplifier around
shorted FET
(Q117 Q120)? input section
NO NO
Output power supply YES FET (Q117 Q120) YES Replace the
is normal? are open? open FET
NO NO
Failure in IC118,
Remove CB106
IC119 or IC107
Check between R221 and
TP304 with the oscilloscope Note: Connect TP304 to the grounding side of the oscilloscope.
Check between R222 and The grounding side of the oscilloscope must be floated
TP304 with the oscilloscope because TP304 is not ground level.
Is the Power
YES Problem in secondary
oscillation 88 kHz?
(Pulse wave 0 - 15 V) power supply
NO
Q126, Q127 is YES Replace defective
short circuit? Q126, Q127
NO
Failure in either Are R560 and Replace
IC127, IC128, IC129, R561 open? R560 and R561
MX-D1
Q128, Q129, Q130, Q131
15
MX-D1
I
MX-D1
16
MX-D1
I PROTECTION INFORMATION /
It is possible to have the protection information displayed
on a PC connected to this unit.
Equipment required
· PC with RS-232C serial port
· Display application software (Terminal software such as
hyper terminal supplied with WINDOWS)
· RS-232C cross cable "D-Sub 9-pin Female".
Pin No.2 RxD Pin No.2 RxD
Pin No.3 TxD Pin No.3 TxD
Pin No.5 GND Pin No.5 GND
Pin No.7 RTS Pin No.7 RTS
Pin No.8 CTS Pin No.8 CTS
Operation
1. With the power turned off, connect the RS-232C cross
cable to the PC and the RS-232C terminal of this unit.
2. Turn on the power to the PC and make the terminal
software settings as follows.
Baud rate : 9600
Data : 8 bit
Parity : None
Stop bit : 1 bit
Flow control : Hardware flow
3. Set the leftmost (closest to the RS-232C connector) DIP
switch on the rear panel of the main unit to the ON
position.
4. With the unit set in the standby state, press the
"STANDBY/ON" key while pressing the "MUTE" key on
the rear panel of the unit and keep pressing them for 3
seconds or longer.
MX-D1
17
MX-D1
5. The protection information as shown below is displayed
on the PC screen.
Protection = PS PROTECTION R (or L)
: In case of PS protection
Protection = DC PS PROTECTION R (or L)
: In case of DC protection
Protection = I PROTECTION R (or L)
: In case of I protection
Protection = TEMP PROTECTION R (or L)
: In case of THERMAL protection
Protection = ICOUT PROTECTION R (or L)
: In case of ICOUT ERROR
Protection = NO PROTECTION
: In case of NO PROTECTION
Note: Any information on display other than the above has
nothing to do with the protection information.
Erasing protection information
After the repair work is completed, erase the protection
information according to the following procedures.
1. With the unit set in the standby state, press the
"STANDBY/ON" key while pressing the "MUTE" key on
the rear panel of the unit and then release the "MUTE"
key but keep pressing the "STANDBY/ON" key only for
3 seconds or longer.
The blue LED flashes.
2. Press the "STANDBY/ON" key.
The red LED flashes.
3. Press the "STANDBY/ON" key.
The purple LED flashes.
4. Press the "STANDBY/ON" key.
The purple LED lights up.
5. Press the "STANDBY/ON" key.
The power is turned off and the protection information is
erased at this time.
MX-D1
18
MX-D1
I IC DATA
IC107: YDA133-E (MAIN P.C.B)
Digital Audio Power Amplifier Controller
24 XO
PLLC 2
PLL
23 XI
SEL 3 Clock
part
22 MCKIO
20 MSSEL
AX1 4
21 CKOUT
AINM 5
Digital
modulation
AINP 6 + 19 HIP
circuit
Operational
VDD 7 18 HIN
amplifier
for integration
GND 1 16 PVDD
Digital modulation part
VSS 8 17 PVSS
DETA2 12
15 MUTEN
Power supply MUTE
DETB2 14 voltage ERROR 9 ERRIN
detection Control
DETA 11
circuit circuit 10 ICOUT
DETB 13
GND
No. Name I/O Function
1 GND Ground
2 PLLC AO Connecting Loop Filter for Internal PLL
3 SEL I Test
4 AX1 AO Precision Input Stage Operational Amplifier Output
5 AINM AI Precision Input Stage Operational Amplifier Inversion Input
6 AINP AI Precision Input Stage Operational Amplifier Non-inversion Input
7 VDD Input Stage Analog Circuit Positive Power Supply
8 VSS Input Stage Analog Circuit Negative Power Supply
9 ERRIN I Error Recognition Signal Input
10 ICOUT OD Error Recognition Signal Output
11 DETA AI Setting Reference Voltage for VPP and VMM Voltage Detection
12 DETA2 AI Setting Open Loop Gain of Digital Amplifier
13 DETB AIO Connecting Capacitor for Setting Power Supply Tuning on Wait Time
14 DETB2 AI Setting Digital Amplifier Open Loop Gain
15 MUTEN I Setting Mute
16 PVDD Positive Power Supply for Output Buffer
17 PVSS Negative Power Supply for Output Buffer
18 HIN O Digital Modulation Signal Inversion Output
19 HIP O Digital Modulation Signal Non-inversion Output
20 MSSEL I Changing Mode between Master and Slave
21 CKOUT O Local Power Supply Driving Clock Output
22 MCKIO IO Clock Input/Output
23 XI I 5.6 MHz CERALOCK *1) Connection Input
24 XO O 5.6 MHz CERALOCK *1) Connection Output (Unconnected)
MX-D1
Note)
AO : Analog Output
AI : Analog Input
AIO : Analog Input/Output
OD : Open Drain Output
PVDD and VDD are shortcircuited on the board.
PVSS and VSS are shortcircuited on the board.
GND is grounded on the board.
*1) CERALOCK of subsequent explanation is the registered trademark of Murata Manufacturing Co., Ltd.
19
MX-D1
IC118, 119: YDA134-E (MAIN P.C.B)
Digital Audio Power Amplifier Driver
VREF Pre Buffer part
VREF 5 8 CDO
Generating circuit
Off time
generating circuit 10 CDI
INN 6
13 CKOUT
INP 3 + Comparator for
differential input
24 PVDD
CKIN 12
AVDD 1 23 OUTH
AVSS 2 AVDD
21 OUTL
Comparator for over
current detection
OCREF 18 20 PVSS
OCDET 19 + Comparator for over
AVDD AVDD
Power supply current release
voltage detection +
11 circuit 14 CAPRST
OCPN
Over current
detection control 15 DVDD
circuit
6V 17 DVSS
AVSS Over current detection part AVSS AVSS
No. Name I/O Function
1 AVDD Positive Power Supply for Analog Circuits
2 AVSS Connecting Reference Potential for Analog Circuits
3 INP AI Analog Signal Input (Positive Logic)
4 NC (Unconnected)
5 VREF AO Constant Voltage VREF Output
6 INN AI Analog Signal Input (Negative Logic)
7 NC (Unconnected)
8 CDO O Output Off Time Trigger Output
9 NC (Unconnected)
10 CDI I Output Off Time Trigger Input
11 OCPN O Over Current Detection Signal Output
12 CKIN I D-d synch. Signal Input
13 CKOUT O D-d synch. Signal Output
14 CAPRST AIO Connecting OCP Cancel Time Setting Capacitor
15 DVDD Positive Power Supply for Digital Circuits
16 NC (Unconnected)
17 DVSS Connecting Reference Potential for Digital Circuits
18 OCREF AI Connecting Reference Potential for Over Current Protection
19 OCDET AI Over Current Detection Input
20 PVSS Connecting Reference Potential for Power MOSFET Drive Output
21 OUTL O Power MOSFET Drive Pull-down Output
22 NC (Unconnected)
23 OUTH O Power MOSFET Drive Pull-up Output
24 PVDD Positive Power Supply for Power MOSFET Drive Output
MX-D1
Note)
AO : Analog Output
AI : Analog Input
AIO : Analog Input/Output
PVDD, AVDD and DVDD are shortcircuited on the board.
PVSS, AVSS and DVSS are shortcircuited on the board.
20
MX-D1
IC701: M30624FGAFP (OPERATION P.C.B) IC701: M30624FGAFP (OPERATION P.C.B)
16 bit µ-COM 16 bit µ-COM
Pin Pin function Function Name Detail of function I/O Pin Pin function Function Name Detail of function I/O
1 P96/ANEX1/SOUT4 SOUT4 (Unconnected) O 51 P43/A19 P43 (Unconnected)
2 P95/ANEX0/CLK4 CLK4 (Unconnected) SCK 52 P42/A18 P42 LED2 LED 2 Standby (Unconnected) O
3 P94/DA1/TB4in DA1 FAN Fan? (Unconnected) DA 53 P41/A17 P41 LED1 LED 1 Protection I
4 P93/DA0/TB3in P93 (Unconnected) O 54 P40/A16 P40 LED0 LED 0 Power I
5 P92/TB2in/SOUT3 P92 VER2 Version Detect 2 SO 55 P37/A15 P37 SPRR Speaker Relay Rch O
6 P91/TB1in/SIN3 P91 VER1 Version Detect 1 SI 56 P36/A14 P36 SPRL Speaker Relay Lch O
7 P90/TB0in/CLK3 P90 VER0 Version Detect 0 SCK 57 P35/A13 P35 TRGIN DC Trigger Input O
8 BYTE BYTE BYTE Single Chip: Vss Vss 58 P34/A12 P34 TRGSEL DC Trigger Select : Through/Power I (PU)
9 CNVss CNVss CNVss When in Memory Expansion Mode: Vss Vss/Vcc 59 P33/A11 P33 TRGOUT DC Trigger Output O
10 P87/Xcin P87 BKY Boot Mode Key I 60 P32/A10 P32 TISW Trigger In Switch I
11 P86/Xcout P86 (Unconnected) I 61 P31/A9 P31 (Unconnected)
12 RESET RESET RESET Reset I 62 Vcc Vcc Vcc +5V Power Supply for CPU Vcc
13 Xout Xout Xout Oscillator Out OPEN 63 P30/A8 P30 PJSW Pin Jack Switch
14 Vss Vss Vss CPU Ground Vss 64 Vss Vss Vss CPU Ground Vss
15 Xin Xin Xin Oscillator In 12MHz 65 P27/A7 P27 (Unconnected)
16 Vcc Vcc Vcc +5V Power Supply for CPU Vcc 66 P26/A6 P26 (Unconnected)
17 P85/NMI NMI NMI Not used Vcc(PU) 67 P25/A5 P25 (Unconnected)
18 P84/INT2 INT2 PSW Power Switch INT 68 P24/A4 P24 (Unconnected)
19 P83/INT1 INT1 PDET Power Detect INT 69 P23/A3 P23 (Unconnected)
20 P82/INT0 INT0 RXDR 232C Reception Data INT (both edges) 70 P22/A2 P22 (Unconnected)
21 P81/TA4in/U P81 (Unconnected) 71 P21/A1 P21 DCRES DC Reset
22 P80/TA4out/U TA4out PCLK1 PS Power PWM1 O 72 P20/A0 P20 /MT Mute O
23 P77/TA3in P77 (Unconnected) 73 P17/D15/INT5 INT5 TRGIN DC Trigger Input INT (both edges)
24 P76/TA3out TA3 MCLK Digital Amp Master Clock 74 P16/D14/INT4 INT4 (Unconnected) INT (LO edge)
25 P75/TA2in/W P75 PSDR Excess Current Detect R 75 P15/D13/INT3 P15 DIP5 DIP Switch 5 INT (LO edge)
26 P74/TA2out/W P74 PCLK2 PS Power PWM2 76 P14/D12 P14 DIP4 DIP Switch 4 O
27 P73/CTS2/RTS2/TA1in/V P73 PSDL Excess Current Detect L 77 P13/D11 P13 DIP3 DIP Switch 3 I
28 P72/CLK2/TA1out/V TA1out (Unconnected) O 78 P12/D10 P12 DIP2 DIP Switch 2 O
29 P71/RXD2/SCL/TA0in/TB5in P71 (Unconnected) TBin5 79 P11/D9 P11 DIP1 DIP Switch 1 I
30 P70/TXD2/SDA/TA0out TA0out (Unconnected) O 80 P10/D8 P10 DIP0 DIP Switch 0 O
31 P67/TXD1 TXD1 TXDF FLASH PRG TXD FLASH 81 P07/D7 P07 /PRIR Chip Error Detect R
32 P66/RXD1 RXD1 RXDF FLASH PRG RXD FLASH 82 P06/D6 P06 /PRIL Chip Error Detect L O
33 P65/CLK1 CLK1 CLKF FLASH PRG SYNC CLK FLASH 83 P05/D5 P05 (Unconnected)
34 P64/CTS1/RTS1/CTS0/CLKS1 P64 RTS/BSY 232C RTS Output O/FALSH 84 P04/D4 P04 (Unconnected)
35 P63/TXD0 TXD0 TXDR 232C Transmission Data ASO 85 P03/D3 P03 (Unconnected)
36 P62/RXD0 RXD0 RXDR 232C Reception Data ASI 86 P02/D2 P02 (Unconnected) O
37 P61/CLK0 P61 RSPS RS232C Power Control O 87 P01/D1 P01 INR Inrush I
38 P60/CTS0/RTS0 CTS0 CTS 232C CTS Input I 88 P00/D0 P00 PRY Power Relay O
39 P57/RDY/CLKout P57 (Unconnected) O 89 P107/AN7 AN7 PRPSR Power Voltage Detect R AD
40 P56/ALE P56 (Unconnected) O 90 P106/AN6 AN6 PRPSL Power Voltage Detect L AD
41 P55/HOLD P55 GND 91 P105/AN5 AN5 (Unconnected) AD
42 P54/HLDA P54 (Unconnected) O 92 P104/AN4 AN4 (Unconnected) AD
43 P53/BCLK P53 (Unconnected) 93 P103/AN3 AN3 THMR Power Amplifier Temperature Detect Rch AD
44 P52/RD P52 (Unconnected) O 94 P102/AN2 AN2 THML Power Amplifier Temperature Detect Lch AD
45 P51/WRH/BHE P51 (Unconnected) I 95 P101/AN1 AN1 PRDR DC Protection Rch AD
46 P50/WRL/WR P50 I 96 Avss Avss Avss Ground for AD Vss
47 P47/CS3 P47 (Unconnected) SO 97 P100/AN0 AN0 PRDL DC Protection Lch AD
48 P46/CS2 P46 (Unconnected) SI 98 Vref Vref Vref Reference Voltage for AD Vcc
49 P45/CS1 P45 (Unconnected) SCK 99 Avcc Avcc Avcc Power Supply for AD Vcc
50 P44/CS0 P44 (Unconnected) O 100 P97/Adtrg/Sin4 P97 (Unconnected) I
21
A B C D E F G H I J
MX-D1
1
I BLOCK DIAGRAM (1/2)
· See page 37
SCHEMATIC DIAGRAM +B
2
MAIN
IC118
D134
D135
D137
YDA134
Q117 Q118
6
IC110
· See page 35 15 · See page 35
3 2.8 MHz 19
SCHEMATIC DIAGRAM Clock Input SCHEMATIC DIAGRAM
18 R195
FUNCTION IC107 22 12
12V
Real-Time FUNCTION
Protection
YDA133
Input Amp. Protection / Mute
IC101 RY509 (Lch)
Q103, Q104
5 + 19 RY511 (Rch)
IN Active Power 7 6 Constant-Gain L101
Control 6 PLL
5 18
Q501~Q520 Modulator Circuit
4