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AD-3

Dec. 1998

7

11. Peak LED, Input Level volume check

 • Turn down the LEVEL knob to the MIN position, and verify that the

output is 0 dBm +/-1 dB, and that the PEAK LED is dark.

 • Verify that there is no output when the LEVEL knob is in the

minimum position.

12. Battery operation check

 • Perform this check while watching the output with the LEVEL knob

in the maximum position.

 • Verify that the unit is not reset even if you disconnect the PSA-Series

from the adapter jack. The PEAK LED will not blink.

* Note: Reset may sometimes occur depending on how the PSA-Series

is disconnected.
The unit will not operate if no batteries have been installed.

13. INPUT switch check

 • Verify than the power turns off when the input is disconnected.

* Note: If the adapter is operating, the unit will operate regardless of the

input.

ERROR MESSASES

BLOCK DIAGRAM

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

1

2

3

4

5

6

7

8

9

10 11

12 13 14 15

16 17 18

Error Message

Possible cause

Solder bridge or improper soldering at 
portion anywhere between CPU (IC3) and 
DSP (IC5). 
CPU (IC3) and / or DSP (IC5) defective.

Solder bridge or improper soldering at 
portion anywhere between DSP (IC5) and 
DRAM (IC6). 
DSP (IC5) or DRAM (IC6) defective.

Solder bridge or improper soldering 
around DSP (IC5).
DSP (IC5) defective.

DSP busy Error 

DSP ERAM Error

DSP PRAM Error 

IRAM Error

JACK BOARD ASSY

VR 1

INPUT LEVEL

IC 2

AD/DA

Codec

IC2

De.En

L ch

R ch

Muting

Muting

Muting

Muting

DSP

TC203C04AF

IC5

RESET

IC7

33.8588MHz

X1

DRAM

MSM51V4256A-70JS

IC6

ADDRESS BUS A0-A2

DATA BUS D0-D7

WR  DR

CPU

M37531M4

IC3

DATA CLK MODE

CPU CLK=2.1162MHz

Pre.En

INPUT

OUTPUT L

OUTPUT R

SYSCLK  BCLK  WS

A/D DATA

D/A DATA

IC 1

AMP

BATTERY 1.5V x 6

ANTI-FEEDBACK AUTO

CHORUS

PEAK

LED2

LED3

LED4

ANTI-FEEDBACK FREQ

VR1

BOTTOM

VR2

TOP

VR3

2x2 CHORUS

VR4

REVERB

VR5

ANTI-FEEDBACK AUTO

SW1

CHORUS

SW2

MAIN BOARD ASSY

SELECT

SW1

AMP

AMP

AMP

AMP

AMP

POWER

IC 8

POWER

LED1

+8V

+4V

+8V

+4V

A+3.3V

IC1

+9V

D+3.3V

IC4

11. PEAK LED、INPUT LEVELボリューム チェック

・ LEVELボリュームをMIN側に絞り、出力が0dBm±1dBで

PEAK LEDが消えることを確認する。

・LEVELボリューム最小で出力が出ないことを確認する。

12.電池動作チェック

・LEVELボリュームを最大にし出力を確認しながら行う。
・アダプター・ジャックよりPSA-100を抜いてもリセットがかか

らない ことを確認する。PEAK LEDが点滅しない。

*注意:抜き方によりリセットがかかる場合があります。

    

電池を入れていない場合は動作しません。

13.INPUTスイッチ チェック

・ 入力を抜くと、電源が切れることを確認する。
* 注意:アダプター動作時は、入力に関係なく動作します。

エラー・メッセージとその内容

/ブロック図

Error Message

主な原因

CPU (IC3)-DSP  (IC5)  

間の半田タッ

 チ、半田付け不良。

CPU (IC3) 

または

DSP (IC5) 

の不良。

DSP ( IC5)  

周辺の間の半田タッチ、

 半田付け不良。

DSP ( IC5) 

の不良。

DSP (IC5)-DRAM (IC6)  

間の半田タ

 ッチ、半田付け不良。

DSP (IC5) 

または

DRAM (IC6) 

の不良。

DSP busy Error 

DSP ERAM Error

DSP PRAM Error 

IRAM Error

Summary of Contents for Boss AD-3

Page 1: ...Adaptor Jack Power Supply Dry battery LR6 AA type 6 DC 9 V PSA Series sold separately Current Draw 90 mA Expected battery life under continuous use Alkaline Approx 17 hours Carbon Approx 9 hours Thes...

Page 2: ...ttery Cover G2027602 Caution Label G2537720 LOCATION OF CONTROLS HOW TO ASSEMBLE THE PAD A B q w e r t y Dry Battery LR6 x 2 x 3 The position of Battery view toward to S side A assembling view toward...

Page 3: ...048630 The securing order of the screw is 1 2 3 4 1 2 3 4 71129690 7112829001 From BATTERY CASE UNIT WIRING 2P From MAIN BOARD ASSY WIRING 10P 3 INTERNAL TOOTH JACK ZC SW PEDAL UNIT SUPPORT SPRING 221...

Page 4: ...n MB 15199159 IR3M03A DC DC Converter IC4 on MB 01569590 NJU7201U32 TE1 Regulator Chip IC1 on MB 15289148 M5218AFP 600E OP Amp Flat IC8 on MB 15189250 M5218AL OP Amp IC1 2 on JB DIODE 15339119T0 1SS35...

Page 5: ...multaneously LEDs will light in the order of AFB CHO and PEAK AFB CHO and PEAK LEDs will blink simultaneously and will stop with the AFB LED lit The above includes verification of test items 1 3 1 PED...

Page 6: ...P position all lit L LINE R position all dark 9 Output mute check Press the AFB pedal and the AFB CHO and PEAK LEDs will blink simultaneously and return to the normal state reset While the PEAK LED is...

Page 7: ...dering at portion anywhere between CPU IC3 and DSP IC5 CPU IC3 and or DSP IC5 defective Solder bridge or improper soldering at portion anywhere between DSP IC5 and DRAM IC6 DSP IC5 or DRAM IC6 defecti...

Page 8: ...8 EA3 9 EA2 11 EA1 13 EA0 16 RAS 20 CAS 19 WE 23 ED7 39 ED6 38 ED5 37 ED4 36 ED3 24 ED2 22 ED1 25 ED0 26 IC5 TC203C040AF 001 C115 47 16 D3 1SS352 Q1 2SA1312GR R29 100 R28 10k C24 5p R39 47 C23 0 1 OU...

Page 9: ...12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 A B C D E F G H I J K L M N O P Q R S T U V CIRCUIT BOARD JACK MAIN View from components side View from components s...

Page 10: ...C4 10 16 C3 0 0022 R5 10k 8 4 IC1C M5218AL R3 10k R2 4 7M Q1 2SK184GR JK1 HTJ 064 12D R1 10k C1 0 022 INPUT R31 22k C17 10p R10 4 7k C9 47 50 R9 100k R11 220 OUTPUT R G AMP C8 47 50 Q2 2SC3327A JK2 H...

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