Yamaha AP-U70 User manual

AP-U70
AP-U70
PERSONAL AMPLIFIER
100735
■CONTENTS
TO SERVICE PERSONNEL ........................................... 1
FRONT PANEL ............................................................... 2
REAR PANELS ............................................................... 2
SPECIFICATIONS ........................................................... 3
INTERNAL VIEW ............................................................ 4
DISASSEMBLY PROCEDURES .................................... 4
SELF DIAGNOSIS FUNCTION ............................... 5 – 13
STANDARD OPERATION CHART .............................. 14
IC DATA ................................................................ 15 – 24
DISPLAY DATA ............................................................ 25
BLOCK DIAGRAM ................................................ 26 – 27
PRINTED CIRCUIT BOARD ................................. 28 – 35
IC BLOCK ............................................................. 36 – 37
SCHEMATIC DIAGRAM ....................................... 38 – 39
PARTS LIST .......................................................... 40 – 49
REMOTE CONTROL TRANSMITTER .......................... 50
PARTS LIST FOR CARBON RESISTORS .................. 51
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.
IMPORTANT NOTICE
AP-U70
SERVICE MANUAL

AP-U70
AP-U70
■TO SERVICE PERSONNEL
1. Critical Components Information
Components having special characteristics are marked Z
and must be replaced with parts having specifications equal
to those 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
from supply circuits.
●Meter impedance should be equivalent to 1500 ohm shunted
by 0.15µF.
●Leakage current must not exceed 0.5mA.
AC LEAKAGE
TESTER OR
EQUIVALENT
EQUIPMENT
UNDER TEST
INSULATING
TABLE
WALL
OUTLET
1
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 REASON
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.
●Be sure to test for leakage with the AC plug in both
polarities.
“CAUTION”
“F1 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 2.5A, 125V FUSE.”
CAUTION
F1 : REPLACE WITH SAME TYPE 2.5A, 125V FUSE.
ATTENTION
F1 : UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 2.5A, 125V.
AV

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■FRONT PANEL
▼U, C models
■REAR PANELS
▼A model ▼B, G models

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■ AUDIO SECTION
Minimum RMS Output Power per Channel
Stereo, 20Hz to 20kHz, 0.8% THD, 6Ω. . . . . 20W+20W
Maximum Power per Channel
Stereo, 1kHz, EIAJ, 10% THD, 6Ω. . . . . . . . . 26W+26W
Input Sensitivity/Impedance
PC, AUX 1, AUX 2 (Analog) . . . . . . . . . . . . 150mV/35kΩ
Maximum Input Signal Level
PC, AUX 1, AUX 2, 1kHz (DSP= THRU) . . . . . . . . . 2.1V
Output Level/Impedance
REC OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . 130mV/2.0kΩ
SUB WOOFER (50Hz) . . . . . . . . . . . . . . . . . . . . . . 2.0V/1.7kΩ
Headphone Jack Rated Output/Impedance
PC Analog Input, etc (1kHz, 150mV) . . . . . . 320mV/61Ω
Frequency Response
USB
20Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.0+1.0/-1.0dB
1kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0dB
20kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5+1.0/-1.0dB
PC, AUX Digital Input
20Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.0+1.0/-1.0dB
1kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0/-0dB
20kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5+1.0/-1.0dB
Total Harmonic Distortion (1kHz, 20k LPF)
USB to SP OUT (4V/6Ω) . . . . . . . . . . . . . . . . . . . . . 0.06%
PC, AUX Digital Input to SP OUT (4V/6Ω) . . . . . . . 0.06%
Signal-to-Noise Ratio (IHF-A-Network)
USB to SP OUT (11V/6Ω) . . . . . . . . . . . . . . . . . . . . . 85dB
PC, AUX Digital Input to SP OUT (11V/6Ω) . . . . . . . 90dB
Residual Noise (IHF-A-Network)
MAIN L/R SP OUT . . . . . . . . . . . . . . . . . . . . . . . . . -68dBV
■SPECIFICATIONS
■GENERAL
Power Supply
U, C models . . . . . . . . . . . . . . . . . . . . . . . AC 120V, 60Hz
A model . . . . . . . . . . . . . . . . . . . . . . . . . . . AC 240V, 50Hz
B, G models . . . . . . . . . . . . . . . . . . . . . . . AC 230V, 50Hz
Power Consumption
U, C, B, G models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60W
A model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55W
Standby Power Consumption . . . . . . . . . . . . . . . . . . . . . 5W
Dimensions (W x H x D) . . . . . . . . . . . . . 120 x 294 x 355mm
(4-11/16”x 11-9/16”x 13-15/16”)
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 kg (12 lbs 2oz)
Finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Silver color
Accessories . . . . . . . . . . . . Remote Control Transmitter x 1
Battery (size "AA", "R06") x 2
USB Cable x 1
CD ROM x 1
* Specifications subject to change without notice.
Manufactured under license from Dolby Laboratories.
"Dolby", "AC-3", "Pro Logic", and the double-D symbol V
are trademarks of Dolby Laboratories. © 1992-1997 Dolby
Laboratories. All rights reserved.
Manufactured under license from Digital Theater Systems,
Inc. US Pat. No. 5,451,942 and other world-wide patents
issued and pending. "DTS", "DTS Digital Surround", are
trademarks of Digital Theater Systems, Inc. copyright
1996 Digital Theater Systems, inc. All rights reserved.
U . . . . . . . . . . USA model
C . . . . . . Canadian model
A . . . . . Australian model
B . . . . . . . . British model
G . . . . . European model
●DIMENSIONS
Units : mm (inch)
120 (4–11/16")
85 (3–5/16")
355 (13–15/16")
253 (9–15/16")
13.5 (1/2")
13 (1/2")
294 (11–9/16")
281 (11–1/16")
283 (11–1/8")

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■INTERNAL VIEW
■DISASSEMBLY PROCEDURES (Remove parts in the order as numbered.)
1. Removal of Top Cover
Remove 14 screws ( qand w) and then remove the
Top Covers in Fig. 1.
qDSP P.C.B.
wMAIN P.C.B.
eOPERATION (1) P.C.B.
rOPERATION (2) P.C.B.
qwer
2. Removal of Front Panel
Remove 6 screws ( e) and then remove the Front
Panel in Fig. 2.
3. Checking the DSP P.C.B.
Remove 4 screws ( r) and then remove the Shield
Case in Fig. 2.
Fig. 2
Fig. 1
w
q
q
q
q
q
q
e
e
r
Top Cover (R)
r
Front Panel
Shield Case
Top Cover (L)
Top Cover
The shield case can be removed only by
loosening these 2 screws marked (r).

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■SELF DIAGNOSIS FUNCTION
This product has a built-in self diagnosis function (DIAG) that can be used for inspection, measurement and
determination of a faulty point, if any.
There are ten menu items, each of which has a number of sub menu items.
Listed below are these menu items and sub-menu items.
Main menu
ALL (Sequential test)
DEV (Device test)
DSP (DSP test)
FL (FL test)
AD (AD test)
USB (USB loop back test)
INIT (Memory initialization)
VER (Version information)
ERROR (Error history)
Sub menu
1. THROUGH
2. DELAY
3. HALL
4. JAZZ
5. CHURCH
6. GAME
7. MOVIE
8. LIVE
9. PC-ANA
10. PC-Digi
11. AUX1-A
12. AUX1-D
13. AUX2-A
14. RETURN
1. AUTO
2. MANUAL
3. RETURN
1. KEY
2. LEVEL
3. JUDGE
4. V-ERR
5. V-MAX
6. V-MID60
7. V-MID55
8. V-MID52
9. V-MID49
10. V-MID29
11. V-MID1
12. V-MIN
13. RETURN
1.START
2. STOP
3. RETURN
1. MEMORY
2. CANCEL
3. RETURN
1. SHV
2. EGAV
3. ChckSum
4. RETURN
1. E0-
2. E1-
3. E2-
4. E3-
5. E4-
6. E5 -
7. E6-
8. E7-
9. CLEAR
10. RETURN
No.
1
2
3
4
5
6
7
8
9
Main menu
DIT (Digital interface)
EXIT
Sub menu
1. GENERAL
2. CD
3. PCM Enc
4. DAT
5. BS JPN
6. Synthe
7. AD
8. SD
9. BS Eur
10. MIXER
11. SFC
12. DSP
13. L Pa:Ch
14. DIR RV
15. RETURN
No.
10
0

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●Starting DIAG
While the opening message appearing at the power ON is on display, press the “DSP”key 3 times; quickly at
the first and second times and keep pressing it at the third time until the DIAG function is started.
●Display when DIAG function is started
First, “DIAG”appears on the FL display of the main unit, followed by the version of the
microcomputer for 1 second (e.g., 1.000f), the checksum of the microcomputer for 2 seconds
(e.g., 7720) and finally the DIAG menu (e.g., 1: ALL). Also, all the function LED segments light
up.
Version of the microcomputer
Checksum of microcomputer
DIAG
1.000f
7720
1:ALL
1 second
later
2 seconds
later
DIAG started
(*1) When there is a history of the protection function
recorded, the type of the last protection function in the
record appears.
When there is no protection function history (*1)
Some seconds
later
DIAG menu

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When the protection function works and the power is turned off after DIAG was started
When the protection function (*2) works, its history appears in the abbreviated form as described below and
the power turns off. Correct the failure based on the history of the protection function.
(*2) When an excessive current or something abnormal in the power source, DC, etc. is detected, the power
is forced to turn off as a protection function.
AmpPt Idisplay
(Turning on the power without solving the problem causes the protection
function to work at that moment and the power turns off immediately.)
Possible cause: An excessive electric current flow to the power amplifier
Supplementary information: The current of the power IC (IC9) is
detected.
PT PS display
(Turning on the power without solving the problem causes the protection
function to work at that moment and the power turns off. If the trouble is
in the power supply related to the display, display may disappear.)
Possible cause: An abnormality in the power supply section (voltage)
Supplementary information: As the following power supply is detected,
the faulty point can be identified.
Transformer secondary winding
RE X 2(CB10)
Stabilizing power source
±15A, +9V, +5A, +5D SW, -VP
AmpPtDc display
(Turning on the power without solving the problem causes the protection
function to work at that moment and the power turns off.)
Possible cause: DC output of the power amplifier detected.
Besides the above possible causes, the cause may be disconnection of the connector, an error around CPU, etc.
●History of protection
When the protection function has worked, its history is stored in the backup memory. Even if no abnormality is found while servicing,
the abnormality the user experienced can be identified by using the data in the backup memory.
The recorded history of the protection function is cleared when the DIAG function is cancelled by setting DIAG menu No.7 INIT to
“MEMORY”(memory initialization) or when the backup memory is erased.

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●Canceling DIAG
There are two methods to cancel the DIAG function.
1) Press the “POWER”(STANDBY) key of the main unit or the “POWER”(STANDBY) key of the remote controller to
enter the stand-by state.
2) Selecting the DIAG menu item 0. EXIT, cancel the DIAG function. Then the self-diagnosis process ends and the
normal operation is restored.
CAUTION: Prior to cancellation of the DIAG function, be sure to execute setting of DIAG menu 7. INIT (reserve /
reserve cancel of memory initialization). (To keep the user memory, execute “CANCEL”(cancellation of resetting
reservation) of 7. INIT setting before canceling the DIAG function.)
●Operation procedure of DIAG menu and SUB-MENU
1) Use the UP w(forward) / DOWN q(reverse) keys to select a main menu item.
2) In case of main menu items 1. ALL and 2. DEV neither of which has sub menu, the
menu item is executed when the DSP key is pressed.
3) In case of main menu items which have sub menu, the sub menu appears when the
DSP key is pressed.
4) Use the UP w(forward) / DOWN q(reverse) keys to select a sub-menu item.
5) The sub-menu item is executed when the DSP key is pressed.
6) To return from the sub-menu to the main menu, have “RETURN”displayed by using
the UP w(forward) / DOWN q(reverse) keys and press the DSP key.
7) To return to the DIAG initial setting (1.ALL) during DIAG operation, press the MUTE
key except for the special case (*3).
(*3) : It is not possible to return to 1.ALL during execution of the AD test.
Main unit
UP w(forward)
DOWN q(reverse)
DSP
MUTE
Remote control key
VOLUME UP w(forward)
VOLUME DOWN q(reverse)
ON/OFF
--- (operation unavailable)
Remote control code
7B---0D
7B---0E
7B---07
---
When using remote controller
●Functions during DIAG operation
Following functions are available even during the DIAG operation.
•Power ON/OFF
•Master volume

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Details of DIAG menu
Display bit
7654
00000
10001
Display 0 0
0000 0000
bit 7654 3210
Display bit
3210
00000
10001
20010
30011
40100
50101
60110
70111
81000
91001
A1010
B1011
C1100
D1101
E1110
F1111
bit7 Unused (“0”usually)
bit6 Unused (“0”usually)
bit5 Unused (“0”usually)
bit4 Checks checksum of IC438 (ROM) (0: OK / 1: NG)
bit3 Checks IC447 (RAM) (0: OK / 1: NG)
bit2 Checks register Read/Write of IC430 (USS820) (0: OK / 1: NG)
bit1 Checks register Read/Write of IC417 (YSS928) (0: OK / 1: NG)
bit0 Checks register Read/Write of IC475 (LC27287B) (0: OK / 1: NG)
1. ALL (Sequential test)
This menu is used to execute major five items of the DIAG menu. The items are as follows.
(Set the volume level to the intermediate value before execution.)
Press the DSP key to advance one step to the next item.
To skip a step, press the MUTE key.
(To end the DIAG function during the AD test of Step 5, keep pressing the DSP key for a long period of time.)
1. Device test (DEVICE) . . . . . . . . . . . . . . . . . . . . . . . . . page 9 2. DEV
2. DSP test (THROUGH) . . . . . . . . . . . . . . . . . . . . . . . . page 10 3. DSP
3. DSP test (DELAY) . . . . . . . . . . . . . . . . . . . . . . . . . . . page 10 3. DSP
4. FL test (Automatic FL change) . . . . . . . . . . . . . . . . . page 10 4. FL
5. AD test (KEY reception test) . . . . . . . . . . . . . . . . . . . page 11 5. AD
The AD test checks if pressing of each key is received properly or not.
Press the key in the order of USB, PC, AUX1, AUX2, DSP, MUTE, DOWN (q) and UP (w).
For the details of Steps 1 through 5, refer to the item corresponding to each step described hereafter.
2. DEV (Device Test)
This menu checks each of the five devices (IC417, 430, 438, 447, 475) for an error.
“OK”appears when no error is detected.
When an error is detected, its content is displayed as “NG-XX”(XX in hexadecimal notation).

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3. DSP (DSP Test)
Using this menu, it is possible to set the sound field effect
and input signals.
There are 14 sub-menus.
1. THROUGH [Remote control code : 7B—16(VDD)]
Passes signals through the DSP section.
2. DELAY [Remote control code : 7B—1F(TEST)]
Uses the delay function in the DSP section.
3. HALL [Remote control code : 7B—10(HALL)]
Sets the DSP for HALL.
4. JAZZ [Remote control code : 7B—11(JAZZ)]
Sets the DSP for JAZZ.
5. CHURCH [Remote control code : 7B—12(CHURCH)]
Sets the DSP for CHURCH.
6. GAME [Remote control code : 7B—13(GAME)]
Sets the DSP for GAME.
7. MOVIE [Remote control code : 7B—14(MOVIE)]
Sets the DSP for MOVIE.
8. LIVE [Remote control code : 7B—15(LIVE)]
Sets the DSP for LIVE.
9. PC-ANA [Remote control code : 7B—02(PC)]
Sets the input for PC-ANALOG.
10. PC-Digi
Sets the input for PC-DIGITAL.
11. AUX1-A [Remote control code : 7B—03(AUX1)]
Sets the input for AUX1-ANALOG.
12. AUX1-D
Sets the input for AUX1-DIGITAL.
13. AUX2-A [Remote control code : 7B—04(AUX2)]
Sets the input for AUX2-ANALOG.
14. RETURN
Returns the menu to the main menu (3.DSP).
All segments go off.
All segments light up.
Segments light up in lattice (Pattern A).
Segments light up in lattice (Pattern B)
2. MANUAL (Manual FL change)
Changes the display every time the DSP key is pressed.
The display contents are the same as the above.
3. RETURN
Returns the menu to the main menu (4. FL).
4. FL (FL Test)
This menu is a lighting program for the FL display.
1. AUTO (Automatic FL change)
Changes the display automatically at 1-seond intervals.

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5. AD (AD Test)
There are 13 sub-menu items.
1. KEY (Key reception test)
Checks if pressing of each key is properly received, using
the key reception program. Keys should be checked in the
order of USB, PC, AUX1, AUX2, DSP, MUTE, DOWN (q)
and UP (w).
When the key reception test is executed, “>USB<”
appears, urging to press the USB key.
When the USB key is pressed properly, “OK”appears for a
moment followed by “>PC<”, urging to press the next PC
key.
When all these keys are checked in this way and check
results are satisfactory, this mode is over.
If an incorrect key is received, “NG”appears and testing
does not proceed to the next key. To exit from this mode,
keep pressing the DSP key for a long period of time.
2. LEVEL (Display of key voltage level)
Displays the voltage level of the key and the reference
value in parallel.
Use the same order for checking keys as the previous key
reception test.
When the voltage level test is executed, “>USB<”appears,
urging to press the USB key.
When the USB key is pressed, “00:00”appears for 1
second followed by “>PC<”, urging to press the next PC
key.
3. JUDGE (Judgment of key voltage level)
Checks if the voltage level of each key is within the normal
range by comparing it with the reference value.
Use the same order for checking keys as the previous key
reception test.
When the key voltage level judge test is executed,
“>USB<”appears, urging to press the USB key.
When the USB key is pressed, “OK:00”appears for 1
second followed by “>PC<”, urging to press the next PC
key.
00:00
Reference value Measured value
The A/D value is displayed in % (voltage value based on 5V as 100%).
O :00
Judgment result Measured value
When the judgment result is not satisfactory, “NG”
appears.
When the voltage level of all the keys is judged in this way,
this mode is over.
To exit from this mode before making judgment of all the
keys, keep pressing the DSP key for a long period of time.
4. V-ERR (Display of power voltage , when abnormal)
Displays for 2 seconds the voltage value when the power
supply protection function has worked due to abnormal
voltage. (The voltage value is meaningless unless the
power supply protection function has worked.)
The voltage value said here is obtained through calculation
using 5V as the reference voltage. Note that deviation of
the reference voltage will result in an error of the voltage
on display.
When the voltage level of all the keys is checked in this
way, this mode is over.
To exit from this mode before checking all the keys, keep
pressing the DSP key for a long period of time.

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5. V-MAX
Sets the main volume to 0dB.
6. V-MID60
Set the main volume to -20dB.
7. V-MID55
Sets the main volume to -25dB.
8. V-MID52
Sets the main volume to -28dB.
9. V-MID49
Sets the main volume to -31dB.
10. V-MID29
Sets the main volume to -51dB.
11. V-MID1
Sets the main volume to -79dB.
12. V-MIN
Sets the main volume to -80dB.
13. RETURN
Returns the menu to the main menu (5. AD).
6. USB (USB loop back test)
1. START [Remote control code : 7B—1C (A)]
Starts the loop back of USB.
2. STOP [Remote control code : 7B—1D (B)]
Stops the loop back of USB.
3. RETURN
Returns the menu to the main menu (6. USB).
* This menu is used for the factory inspection before
shipping.
7. INIT (Memory initialization)
1. MEMORY (Memory reset reservation)
Reserves the backup RAM to be reset to the factory
setting before shipping.
Actual initialization is executed when the power is turned
on with the DIAG function cancelled.
2. CANCEL (Cancellation of memory reset reservation)
Makes the memory reset reservation invalid. RAM
initialization is not executed.
3. RETURN
Returns the menu to the main menu (7. INIT).
8. VER (Version information)
1. SHV
Displays the version information of the microcomputer
(IC436).
The final alphabet indicates the version of the boot area. If
the rewrite version is different, it is not transmitted
properly.
2. EGAV
Displays the version information of the gate array (IC475:
LC27287B).
3. ChckSum
Displays the checksum information of the microcomputer
(IC436).
4. RETURN
Returns the menu to the main menu (8.VER).

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9. ERROR (Error history)
1 –8 E0 –E7 (Error history)
The history of up to 8 errors is stored in memory. The error
codes are used to display it.
9. CLEAR (Error history clear)
Clears the entire error history in memory and overwrites
with the normal value (00).
10. RETURN
Returns the menu to the main menu (9. ERROR).
Error code
00
11 –14
21 –2B
2C –2E
2F
41 –46
80
81
82
83
84
85
90
91
92
93
A0
Description
No error
USB internal error
USB interrupt error
USB communication error (*1)
USB interrupt transmission error
USB stream error (*2)
Checksum error
RAM (IC447) Read/Write error
AC3D(IC417) Read/Write error
EGAV (IC475) Read/Write error
Backup RAM initialized at the power ON (*3)
RAM for Y-mersion coefficient initialized at the power ON
Detection of abnormality in power voltage
Detection of current of power amplifier
Detection of DC of power amplifier
Detection of abnormality in Tri-path amplifier (unused)
Auto power OFF (24h)
(*1) : When the AC plug is plugged and unplugged with USB
connected, this error may be recorded but it causes no
problem in actual use.
(*2) : This error is not as fatal at to cause any problem in actual
use.
(*3) : This code is recorded in the error history at least once
because the memory is cleared at the time of shipping from
the factory.
10. DIT (Digital input/output control)
1. GENERAL
GENERAL category code output (0x00)
2. CD
CD category code output (0x01)
3. PCM Enc
PCM Encoder/decoder category code output (0x02)
4. DAT
DAT category code output (0x03)
5. BS JPN
BS JAPAN category code output (0x04)
6. Synthe
Synthesizer category code output (0x05)
7. AD
A/D converter category code output (0x06)
8. SD
Solid state memory category code output (0x08)
9. BS Eur
BS Euro category code output (0x0E)
10. MIXER
Digital signal mixer category code output (0x12)
11. SFC
Sampling rate converter category code output (0x1A)
12. DSP
Digital sound processor category code output (0x2A)
13. L Pa:Ch
Ch Change L bit parent $^ child
14. DIR RV
Digital interface receive code display
15. RETURN
Returns the menu to the main menu (10. DIT).
0. EXIT (DIAG end)
Terminates the DIAG function, executes CPU resetting
and restart operation.
Use the input selector USB for restarting operation.
Executing the memory reset reservation setting will set to
the standby mode.

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14
■STANDARD OPERATION CHART
POWER SW to ON
or connecting AC cord
Backup memory
check
Setting the initial settings
Is the power
turned on at the
standby mode ?
Reseting Gate arry IC
& USB microcontroller
Resetting FL driver IC
Is the power
turned to ON? Standby process
Turning the master relay on
Turning the total mute and
the mix mute function off
Releasing Gate array IC
from the resetting mode
DMVDD ON
Resetting YSS928
and DAC ICs
Releasing the FL driver IC
from the resetting mode
Displaying "Hello"
Self-Diagnosis
mode?
Did it pass 3.5
seconds from the
starting -up ?
Communicating with
GUI application
Turning the speaker relay
on if headphone is not
connected
Turning the toatal mute
functon off
Main process
NO
YES
NG
OK
NO
YES
NO
YES
IC436, 102pin: H
IC436, 42pin: L
IC436, 89pin: H
IC436, 107pin: L
IC436, 110pin: H
IC436, 112pin: L
IC436, 30pin: H
IC436, 42pin: H
IC436, 1pin: H
IC436, 111pin: H
IC436, 107pin: H

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15
IC417 : YSS928
AC3D3
120
11
118 117 116
11
114 113 112 111
110
109
108
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
78
77
80
79
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
13
107
14
106
15
105
16
104
17
103
18
102
19
101
20
100
99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81
21 12 11 10 9 8 7 6 5 4 3 2 1 34 35 36 37 38 39 40 33 32 31 30 29 28 27 26 25 24 23 22
160
159
158
157
156
155
154
153
152
151
150
149
148
147
146
145
144
143
142
141
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
125
124
123
122
121
YSS928
XO
XI
SELI1 SELI0
SELOA
SELOB
TESTMS
TESTXEN
IPORT0 IPORT1 IPORT2 IPORT3 IPORT4
DDIN0 DDIN1 DDIN2 DDIN3
VSS
CPO
AVDD
DIRPCO
DIRPRO
AVSS
TESTBRK
TESTR1 TESTR2
VDD1
SDWCKI0
SDBCKI0
/SDBCKO
IPORT8 IPORT9
IPORT10 IPORT11
SDIA
SDOA2 SDOA1 SDOA0
SDIB3 SDIB2
RAMA9 RAMA3 RAMA4 SELI9 SELI10 SELI11 SELI12 SELI13 RAMA2 RAMA5 RAMA1 RAMA6 RAMA0 RAMA7 RAMA8 VDD1 VSS RASN RAMOEN RAMWEN CASN RAMD15 RAMD14 RAMD13 RAMD12 RAMD11 RAMD10 RAMD9 RAMD8 VDD1 VSS RAMD7 RAMD6 RAMD5 RAMD4 ZEROBF0L ZEROBF0R ZEROBF1L ZEROBF1R RAMD3
RAMD2
RAMD1
RAMD0
VDD2
VSS
OPORT7
OPORT6
OPORT5
OPORT4
OPORT3
OPORT2
OPORT1
OPORT0
ZEROBF2L
ZEROBF2R
ZEROBF3L
ZEROBF3R
VDD1
SDOB0
SDOB1
SDOB2
SDOB3
VSS
SDBCKI1
SDWCKI1
DBL/V
FS128/C
SYNC/U
ERR/BS
DIRMCK
DIRBCK
DIRWCK
DIRSDO
IPORT14
IPORT13
IPORT12
VDD2
VSS
SDIB0
SDIB1
RAMA10
RAMA11
VSS
VDD2
SELI8
SELI7
SELI6
SELI5
RAMA12
RAMA13
RAMA14
RAMA15
RAMA16
RAMA17
OVFB/END
ZEROFLG
VSS
NONPCM
DTSDATA
AC3DATA
MUTE
KARAOKE
VDD1
SURENC
CRC
/LOCK
DIRINT
/CS
SO
SI
SCK
/IC
IPINT
SELI4
VSS
SELI3
SELI2
TESTXI
TESTXO
VDD2
FS128/C
SYNC/U
DIRINT
DDIN0
DDIN1
DDIN2
DDIN3
ERR/BS
DBL/V
/LOCK
DIRPCO
DIRPRO
DIRSDO
SDIA
SURENC
KARAOKE
MUTE
CRC
AC3DATA
DTSDATA
NONPCM
ZEROFLG
XI
XO
CPO
SDOA0 SDOA1 SDOA2
SDIB0 SDIB1 SDIB2 SDIB3
RAND0–15
CASN RASN
RAMWEN
RAMOEN
RAMA0–17
OVFB/END
ZEROBF3R–0L
SELOB
SELOA
SDBCKI1
SDWCKI1
SDOB0
SDOB1
SDOB2
SDOB3
DIRMCK DIRBCK DIRWCK SDBCKI0 SDWCKI0 /SDBCKO IPORT0–4 IPORT8–14 IPINT /CS SO SI SCK OPORT0–7 SELI0–13
IPORT5–7
CMODUMODDDINSELBSMODVMOD
DIR
DIRO
INTERFACE
SDIA
INTERFACE
SDOA
INTERFACE
SDIB
INTERFACE
SUB DSP
MAIN DSP
AC-3/PRO LOGIC/DTS
DECODER
567
DBL
PLL
DIR CLOCK
(25MHz)
V
ERR
BS
SYNC
U
FS128
C
SDIASEL
SDIBSEL
SDIACKSEL
SDOB
INTERFACE
CRC
PLL
DSP CLOCK
(30MHz)
EXTERNAL
RAM
INTERFACE OVFSEL
L, R
LS, RS
C, LFE
SDIBCKSEL SDOBCKSEL
MICROPROCESSOR INTERFACE
CONTROL REGISTER
COEFFICIENT
PROGRAM
RAM
SELA SELB
CONTROL SIGNAL
MPLOAD
OVFB
END
■IC DATA

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16
No. Name I/O Function
1 XO O Crystal oscillator connecting terminal
2 XI I Crystal oscillator connecting terminal (24.576MHz )
3 SELI1 I+ Built-in selector input 1 (SDOA1)
4 SELI0 I+ Built-in selector input 0 (SDOA0)
5 SELOA O+ Built-in selector output A (PAI7)
6 SELOB O+ Built-in selector output B (unconnected)
7 TESTMS I+ Test terminal (unconnected)
8 TESTXEN I+ Test terminal (unconnected)
9 IPORT0 I+ General purpose input terminal (unconnected)
10 IPORT1 I+ General purpose input terminal (unconnected)
11 IPORT2 I+ General purpose input terminal (unconnected)
12 IPORT3 I+ General purpose input terminal (unconnected)
13 IPORT4 I+ General purpose input terminal (unconnected)
14 DDIN0 Is DIR: Digital audio interface data input terminal 0 (PA09)
15 DDIN1 Is DIR: Digital audio interface data input terminal 1/General purpose input terminal (GND)
16 DDIN2 Is DIR: Digital audio interface data input terminal 2/General purpose input terminal (GND)
17 DDIN3 Is DIR: Digital audio interface data input terminal 3/General purpose input terminal (GND)
18 VSS Ground terminal
19 CPO A PLL filter connecting terminal
20 AVDD +3.3V power terminal (for DIR)
21 DIRPCO A DIR: PLL filter connecting terminal
22 DIRPRO A DIR: PLL filter connecting terminal
23 AVSS Ground terminal (for DIR)
24 TESTBRK I+ Test terminal (unconnected)
25 TESTR1 I+ PLL initialization signal input terminal for DSP (/D_RST)
26 TESTR2 I+ Test terminal (unconnected)
27 VDD1 +3.3V power terminal (for terminal section)
28 SDWCKI0 I+ Word clock input terminal for SDIA, SDOA, SDIB, SDOB interface (SFS)
29 SDBCKI0 I+ Bit clock input terminal for SDIA, SDOA, SDIB, SDOB interface (S64F)
30 /SDBCK0 O DIRBCK or SDBCKI0 invert clock output terminal (unconnected)
31 IPORT8 I+ IPINT general purpose input terminal (unconnected)
32 IPORT9 I+ IPINT general purpose input terminal (unconnected)
33 IPORT10 I+ IPINT general purpose input terminal (unconnected)
34 IPORT11 I+ IPINT general purpose input terminal (unconnected)
35 SDIA I AC-3/DTS bit stream (or PCM) data input terminal to Main DSP (PA03)
36 SDOA2 O PCM output terminal from Main DSP (C/LFE output) (SDOA2)
37 SDOA1 O PCM output terminal from Main DSP (LS/RS output) (SDOA1)
38 SDOA0 O PCM output terminal from Main DSP (L/R output) (SDOA0)
39 SDIB3 I+ PCM input terminal 3 to Sub DSP (unconnected)
40 SDIB2 I+ PCM input terminal 2 to Sub DSP (PA06)
41 SDIB1 I+ PCM input terminal 1 to Sub DSP (PA05)
42 SDIB0 I+ PCM input terminal 0 to Sub DSP (PA04)
43 VSS Ground terminal
44 VDD2 +2.5V power terminal (for internal circuit)
45 IPORT12 I+ IPINT general purpose input terminal (unconnected)
46 IPORT13 I+ IPINT general purpose input terminal (unconnected)
47 IPORT14 I+ IPINT general purpose input terminal (unconnected)
48 DIRSDO O AC-3/DTS bit stream (or PCM) data output terminal from DIR (PAI8)
49 DIRWCK O DIR: Serial data word clock (fs) output terminal (XFS)
50 DIRBCK O DIR: Serial data bit clock (64fs) output terminal (X64FS)
51 DIRMCK O DIR: Serial data master clock (256fs or 128fs) output terminal (X256FS)
52 ERR/BS O DIR: Data error detect output/block start output terminal (DIRERR)
53 SYNC/U O DIR: Serial data synchronous timing output/user data output terminal (XSYNC)
54 FS128/C O DIR: Serial data master clock 128fs output/channel status output terminal (X128FS)
55 DBL/V O DIR: Double rate clock output/validity flag output terminal (DBL/V)
IC417 : YSS928
AC3D3

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17
No. Name I/O Function
56 SDWCKI1 I+ Word clock input terminal for SDIB, SDOB interface (unconnected)
57 SDBCKI1 I+ Bit clock input terminal for SDIB, SDOB interface (unconnected)
58 VSS Ground terminal
59 SDOB3 O PCM output terminal from Sub DSP (SDOB3)
60 SDOB2 O PCM output terminal from Sub DSP (PAI6)
61 SDOB1 O PCM output terminal from Sub DSP (PAI5)
62 SDOB0 O PCM output terminal from Sub DSP (PAI4)
63 VDD1 +3.3V power terminal (for terminal section)
64 ZEROBF3R O+ SDOB3 Rch zero flag output terminal (unconnected)
65 ZEROBF3L O+ SDOB3 Lch zero flag output terminal (unconnected)
66 ZEROBF2R O+ SDOB2 Rch zero flag output terminal (unconnected)
67 ZEROBF2L O+ SDOB2 Lch zero flag output terminal (unconnected)
68 OPORT0 O General purpose output terminal (LED_PC)
69 OPORT1 O General purpose output terminal (LED_A1)
70 OPORT2 O General purpose output terminal (LED_A2)
71 OPORT3 O General purpose output terminal (LED_TU)
72 OPORT4 O General purpose output terminal (unconnected)
73 OPORT5 O General purpose output terminal (unconnected)
74 OPORT6 O General purpose output terminal (unconnected)
75 OPORT7 O General purpose output terminal (unconnected)
76 VSS Ground terminal
77 VDD2 +2.5V power terminal (for internal circuit)
78 RAMD0 I+/O Sub DSP: External memory data terminal 0
79 RAMD1 I+/O Sub DSP: External memory data terminal 1
80 RAMD2 I+/O Sub DSP: External memory data terminal 2
81 RAMD3 I+/O Sub DSP: External memory data terminal 3
82 ZEROBF1R O+ SDOB1 Rch zero flag output terminal (unconnected)
83 ZEROBF1L O+ SDOB1 Lch zero flag output terminal (unconnected)
84 ZEROBF0R O+ SDOB0 Rch zero flag output terminal (unconnected)
85 ZEROBF0L O+ SDOB0 Lch zero flag output terminal (unconnected)
86 RAMD4 I+/O Sub DSP: External memory data terminal 4
87 RAMD5 I+/O Sub DSP: External memory data terminal 5
88 RAMD6 I+/O Sub DSP: External memory data terminal 6
89 RAMD7 I+/O Sub DSP: External memory data terminal 7
90 VSS Ground terminal
91 VDD1 +3.3V power terminal (for terminal section)
92 RAMD8 I+/O Sub DSP: External memory data terminal 8
93 RAMD9 I+/O Sub DSP: External memory data terminal 9
94 RAMD10 I+/O Sub DSP: External memory data terminal 10
95 RAMD11 I+/O Sub DSP: External memory data terminal 11
96 RAMD12 I+/O Sub DSP: External memory data terminal 12
97 RAMD13 I+/O Sub DSP: External memory data terminal 13
98 RAMD14 I+/O Sub DSP: External memory data terminal 14
99 RAMD15 I+/O Sub DSP: External memory data terminal 15
100 CASN O Sub DSP: Column address strobe output terminal for external DRAM
101 RAMWEN O Sub DSP: Write enable terminal for external memory
102 RAMOEN O Sub DSP: Output enable terminal for external memory
103 RASN O Sub DSP: Low address strobe output terminal for external DRAM
104 VSS Ground terminal
105 VDD1 +3.3V power terminal (for terminal section)
106 RAMA8 O Sub DSP: External memory address terminal 8
107 RAMA7 O Sub DSP: External memory address terminal 7
108 RAMA0 O Sub DSP: External memory address terminal 0
109 RAMA6 O Sub DSP: External memory address terminal 6
110 RAMA1 O Sub DSP: External memory address terminal 1
IC417 : YSS928
AC3D3

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18
No. Name I/O Function
111 RAMA5 O Sub DSP: External memory address terminal 5
112 RAMA2 O Sub DSP: External memory address terminal 2
113 SELI13 I+ Built-in selector input 13 (unconnected)
114 SELI12 I+ Built-in selector input 12 (unconnected)
115 SELI11 I+ Built-in selector input 11 (unconnected)
116 SELI10 I+ Built-in selector input 10 (unconnected)
117 SELI9 I+ Built-in selector input 9 (unconnected)
118 RAMA4 O Sub DSP: External memory address terminal 4
119 RAMA3 O Sub DSP: External memory address terminal 3
120 RAMA9 O Sub DSP: External memory address terminal 9 (unconnected)
121 RAMA10 O Sub DSP: External memory address terminal 10 (unconnected)
122 RAMA11 O Sub DSP: External memory address terminal 11 (unconnected)
123 VSS Ground terminal
124 VDD2 +2.5V power terminal (for internal circuit)
125 SELI8 I+ Built-in selector input 8 (unconnected)
126 SELI7 I+ Built-in selector input 7 (unconnected)
127 SELI6 I+ Built-in selector input 6 (SDOB3)
128 SELI5 I+ Built-in selector input 5 (PAI6)
129 RAMA12 O Sub DSP: External memory address terminal 12 (unconnected)
130 RAMA13 O Sub DSP: External memory address terminal 13 (unconnected)
131 RAMA14 O Sub DSP: External memory address terminal 14 (unconnected)
132 RAMA15 O Sub DSP: External memory address terminal 15 (unconnected)
133 RAMA16 O Sub DSP: External memory address terminal 16 (unconnected)
134 RAMA17 O Sub DSP: External memory address terminal 17 (unconnected)
135 OVFB/END O Sub DSP: Overflow/program end detect terminal (OVFB)
136 ZEROFLG O Main DSP: Zero flag output terminal (ZEROFLG)
137 VSS Ground terminal
138 NONPCM O Main DSP: Non-PCM data detect terminal
139 DTSDATA O Main DSP: DTS data detect terminal
140 AC3DATA O Main DSP: AC3 data detect terminal
141 MUTE O Main DSP: Auto mute detect terminal
142 KARAOKE O Main DSP: AC3 KARAOKE data detect terminal
143 VDD1 +3.3V power terminal (for terminal section)
144 SURENC O Main DSP: AC-3 2/0 mode Dolby surround encode input detect terminal
145 CRC O Main DSP: AC3 CRC error detect terminal
146 /LOCK O DIR: PLL lock detect terminal (/DIRLOCK)
147 DIRINT O DIR: Interrupt output terminal
148 /CS Is Microprocessor interface chip select input terminal (AC3CS)
149 SO Ot Microprocessor interface data output terminal (SDI)
150 SI Is Microprocessor interface data input terminal (SDO)
151 SCK Is Microprocessor interface clock input terminal
152 /IC Is Initial clear input terminal (/ICD)
153 IPINT O+ Interrupt output terminal by IPORT 8-14 (unconnected)
154 SELI4 I+ Built-in selector input 4 (PAI5)
155 VSS Ground terminal
156 SELI3 I+ Built-in selector input 3 (PAI4)
157 SELI2 I+ Built-in selector input 2 (SDOA2)
158 TESTXI I Test terminal (should be always connected to VSS)
159 TESTXO O Test terminal (unconnected)
160 VDD2 +2.5V power terminal (for internal circuit)
Is: Schmidt trigger input terminal
I+: Input terminal with pull-up resistor
O: digital output terminal
Ot: Tri-state digital output terminal
A: Analog terminal
IC417 : YSS928
AC3D3

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19
IC436 : HD6417014F28
16 bit µ-COM (CPU)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
PE14/DACK0/AH
PE15/DACK1
VSS
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
VCC
A17
VSS
PB2/IRQ0/RAS
PB3/IRQ1/CASL
PB4/IRQ2/CASH
VSS
PB5/IRQ3/RDWR
RES
PA15
PLLVSS
PLLCAP
PLLVCC
MD0
MD1
VCC
NMI
MD2
EXTAL
MD3
XTAL
VSS
D0
D1
D2
D3
D4
VCC
D5
D6
D7
VSS
D8
D9
D10
D11
PE13 PE12 PE11 VSS PE10 PE9 PE8 PE7/TIOC2B PE6/TIOC2A VCC PE5/TIOC1B VSS AVCC PF7/AN7 PF6/AN6 AVSS PF5/AN5 PF4/AN4 PF3/AN3 PF2/AN2 PF1/AN1 PF0/AN0 VSS PE4/TIOC1A PE3/TIOC0D/DRAK1 PE2/TIOC0C/DREQ1 PE1/TIOC0B/DRAK0 PE0/TIOC0A/DREQ0
PB6/A18 PB7/A19
PB8/IRQ6/A20/WAIT
PB9/IRQ7/A21
VSS
RD
WDTOVF
WRH
VCC
WRL
VSS
CS1 CS0
PA9/TCLKD/IRQ3 PA8/TCLKC/IRQ2
PA7/TCLKB/CS3 PA6/TCLKA/CS2
PA5/SCK1/DREQ1/IRQ1
PA4/TXD1
PA3/RXD1
PA2/SCK0/DREQ0/IRQ0
PA1/TXD0
PA0/RXD0
D15 D14 D13
VSS
D12
84
83
82
81
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
112 111 110 109 108 107 106 105 104 103 102 101 100
99 98 97 96 95 94 93 92 91 90 89 88 87 86 85
SERIAL
COMMUNICATION
INTERFACE (X 2CH)
INTERRUPT
CONTROLLER
USER
BREAK
CPU
BUS STATE
CONTROLLER
DIRECT •MEMORY
ACCESS •CONTROLLER
RAM/CACHE
3KB/1KB
MULTI-FUNCTION
TIMER •PULSE UNIT
CONVEYOR •MATCH
TIMER (X 2CH)
A/D
CONVERTER
WATCH
DOG
TIMER
PLL
RES
WDTOVF
MD3
MD2
MD1
MD0
NMI
EXTAL
XTAL
PLLVCC
PLLCAP
PLLVSS
VCC
VCC
VCC
VCC
VCC
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
AVCC
AVSS
A15
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
PF7/AN7 PF6/AN6 PF5/AN5 PF4/AN4 PF3/AN3 PF2/AN2 PF1/AN1 PF0/AN0
PE15/DACK1
PE14/DACK0/AH
PE13 PE12 PE11 PE10
PE9 PE8
PE7/TIOC2B PE6/TIOC2A PE5/TIOC1B PE4/TIOC1A
PE3/TIOC0D/DRAK1
PE2/TIOC0C/DREQ1
PE1/TIOC0B/DRAK0
PE0/TIOC0A/DREQ0
PA15/CK RD WRH WRL CS1 CS0 PA9/TCLKD/IRQ3 PA8/TCLKC/IRQ2 PA7/TCLKB/CS3 PA6/TCLKA/CS2 PA5/SCK1/DREQ1/IRQ1 PA4/TXD1 PA3/RXD1 PA2/SCK0/DREQ0/IRQ0 PA1/TXD0 PA0/RXD0 PB9/IRQ7/A21 PB8/IRQ6/A20/WAIT PB7/A19 PB6/A18 PB5/IRQ3/RDWR PB4/IRQ2/CASH PB3/IRQ1/CASL PB2/IRQ0/RAS A17 A16