May 2002
CH-1(T)
SERVICE NOTES Second Edition
Issued by RJA
SPECIFICATIONS.............................................................2 LOCATION OF CONTROLS,PARTS CONTROLS,PARTS LIST ...................3 ................... 3 EXPLODED VIEW,PARTS LIST .....................................4 ..................................... 4 PARTS LIST........................................................................5 THE INSPECTION METHOD ........................................7 ........................................ 7 CIRCUIT BOARD..............................................................8 CIRCUIT DIAGRAM........................................................9
WARNING Due to an IC change, the parts have been changed from serial No. AP11700. We call the new type of this model, CH-1A for identifying the old type and new type for convenience on service system. Although the model name will change from “CH-1” to “CH-1A”, the product pedal is still labeled “CH-1”. The appearance of “CH-1” and “CH-1A” are the same. Identify by the serial number or the model name that is silk-screen printed on the board. When referring to the service notes or ordering parts, check the model name using the above process. This service note is for “CH-1A”. Refer t o “CH-1 SERVICE NOTES”(#17059132)when NOTES”(#17059132)when repairing “CH-1”. Variable resistor, jack, switch and mechanical parts for the “CH-1” and “CH-1A” are compatible
Copyright © 2002 ROLAND CORPORATION All rights reserved. No part of this publication may be reproduced in any form without the written permission of ROLAND CORPORATION.
17059132E2
Printed in Japan (0800) (AS)
May 2002
SPECIFICATIONS Power Supply DC 9 V; Dry battery (6F22/9V) AC Adaptor (PSA-series)
Current Draw 22 mA (DC 9 V) *
Expected Expected battery battery life life under under continuou continuouss use: use:
Carbon: 12 hours These figures will vary depending on the actual conditions of use.
Controls Pedal Switch Effect Level Equalizer Modulation Rate Modulation Depth
Indicator Check Indicator (serves also as battery check indicator)
Jacks Input Output A Output B AC Adaptor
Residual Noise -95 dBu or less (IHF-A, Typ.) with EQ set to the center position
Input Impedance 1 M ohm
Output Load Impedance 10 k ohm or greater
Dimensions 73 (W) x 129 (D) x 59 (H) mm 2-7/8 (W) x 5-1/8 (D) x 2-3/8 (H) inches
Weight 400 g / 14 oz (including battery)
Accessories OWNER’S MA M ANUAL
ENGLISH(#G601721501) JAPANESE(#G601721603)
Dry Battery(#********); 6F22/9V (Carbon) Leaflet (“USING THE UNIT SAFELY,” “IMPORTANT NOTES,” and “Information”)
Options AC Adaptor PSA-Series *
0 dBu dBu = 0.7 0.775 75 Vrms Vrms
*
In the interest interest of product product improvem improvement, ent, the specific specification ationss and/or appear appearance ance of this unit are subject to change without prior notice.
2
CH-1(T)
LOCATION OF CONTROLS,PARTS LIST fig.panel
NO . 1 2 3 4 5 7 6 8 9 10 11 12 13 14 15
PART CODE 2247738600 1327 132799 9918 18 2221758901 13449150MF 2235730400 H5029820 752443C000 752442T000 F3449112 2247738600 F3239402 1502928100 13449711 2253753801 2202785100 2235730500 G253751603
PART NAME KNOB POT POTENTIO NTIOM METER TER (E.L (E.LE EVEL VEL/EQ/ /EQ/R RATE) TE) PANEL PHONE JACK (STEREO) FOOT BASE (PEDAL MAT) THUMB SCREW CASE PEDAL JACK (STEREO) KNOB (GRAY) POTENTIOMETER LED (RED) AC ADAPTOR JACK PSA CAUTION BOTTOM COVER BOTTOM BASE BOTTOM CAUTION PSA
DESCRIPTION 247-386 RK09 RK0971 7111 1100 250K 250KC C HTJ-064-12D 235-304 3X10MM
HTJ-064-13D 247-386 RD901-20-15K-B15 10 100KB L-34HDSL HEC-0470-01-630 253-538
FCC/CE/C-TICK/EMC GRY
3
May 2002
EXPLODED VIEW,PARTS LIST fig.explo
10 1 1 d 2 a
9
8
b
3
7
6 c
4
5
[PARTS] N o. 1 2 3 4 5 6 7 8 9 10
PART CODE 13129710 2226733300 F3419102 G253751603 2235730500 2202785100 2216756000 2215770201 2217710900 2235730400
PART NAME SWITCH (PUSH) CUSHION BATTERY CONNECTOR BOTTOM CAUTION PSA BOTTOM BASE BOTTOM COVER INSULATION SPACER PEDAL GUIDE BUSH COIL SPRING FOOT BASE (PEDAL MAT)
DESCRIPTION JM-0404 226-333 FCC/CE/C-TICK/EMC GRY 235-305 202-851 215-702 217-109 235-304
[SCREW] N o. a b c d
4
PART CODE H5039401 40010267 40010901 H5029820
PART NAME NYLON WASHER 3X6X0.5 SCREW M3X10 SCREW M3X6 SCREW M3X10
DESCRIPTION BINDING FE BZC BINDING B1 BZC THUMB SCREW
Q’TY 2 2 4 1
Q’TY 1 1 1 1 1 1 1 1 1 1
CH-1(T)
PARTS LIST fig.part1e
SAFETY PRECAUTIONS: The parts marked have safety-related safety-relate d characteristics characteristics.. Use only listed parts for replacement.
CONSIDERATION ON PARTS ORDRING When ordering any parts listed in the parts list, please specify the following items in the order sheet. QTY PART NUMBER DESCRIPTION MODEL NUMBER Ex. 10 22575241 Sharp Key C-20/50 15 2247017300 Knob (orange) DAC-15D Failure to completely fill the above items with correct number and description will result in delayed or even undelivered replacement.
NOTE: The parts marked # are new. (initial parts)
CASING
# # #
2235730500 2235730400 2202785100 752443C000 2221758901 752442T000
BOTTOM BASE FOOT BASE (PEDAL MAT) BOTTOM COVER CASE PANEL PEDAL
235-305 235-304 202-851
1 1 1 1 1 1
2247738600
KN O B
247-386 (GRAY)
4
13129710
JM-0404
SWITCH (PUSH)
SW1
1
13449150MF F3449112 13449711
HTJ-064-12D HTJ-064-13D HEC-0470-01-630
PHONE JACK (STEREO) JACK (STEREO) AC ADAPTOR JACK
JK2,JK3 (OUT PUT A , OUT PUT B) JK1 (IN PUT) JK4
2 1 1
752443O000 752443L000 752443P001
JACK BOARD ASSY LED BOARD ASSY MAIN BOARD ASSY
CH-1A CH-1A CH-1A
F5199105 02894289 F5209133 15289141
S-81250 SGY-Z NJM022BM ES56028S M5223AFP-600D
IC (REGULATOR) IC (OP AMP) IC (ECHO) IC (BIPOLAR OP AMP)
IC6 IC2,IC4 IC1 IC5
1 2 1 1
15319108 15319107 F5329530 15329103T0
2SC-3324GR-TE85R 2SC4116-GR(TE85R) 2SK879Y 2SK880-GR(TE85R)
TRANSISTOR TRANSISTOR FET TRANSISTOR FET TRANSISTOR
Q1 Q5,Q6,Q7,Q8,Q9,Q10 Q2,Q4 Q3
1 6 2 1
01019534 1502928100 15339121 F5339201 F5339312
1SS355 TE-17 L-34HDSL 1SS301(TE85R)(CHIP) GS1G RD5.6S B3
SWITCHING DIODE LED (RED) DIODE DIODE DIODE
D3,D4 LED1 DA1,DA2 D2 D1
2 1 2 1 1
00567023 00567156 00567289
RPC05T 101 J RPC05T 102 J RPC05T 103 J
MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR
1 3 13
00567412 00567556 00567290 00567423 00567301 00567189 00567312 00567323 00567456
RPC05T 104 J RPC05T 105 J RPC05T 123 J RPC05T 124 J RPC05T 153 J RPC05T 182 J RPC05T 183 J RPC05T 223 J RPC05T 224 J
MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR
R56 R1,R18,R71 R2,R5,R7,R9,R10,R12,R19,R23,R25,R27,R35, R37, R3,R21,R28,R33,R40,R41,R62 R6,R14,R20,R24,R34,R53,R69,R70 R11,R26 R58 R43,R61,R63 R42 R16,R17 R22 R68
KNOB,BUTTON
SWITCH
JACK,EXT TERMINAL
PWB ASSY
# # #
1 1 1
IC
TRANSISTOR
DIODE
RESISTOR
7 8 2 1 3 1 2 1 1
5
May 2002 RESISTOR
00567334 00567345 00567112 00567378 00567256 00567389 01892767 01892989
RPC05T 273 J RPC05T 333 J RPC05T 471 J RPC05T 473 J RPC05T 562 J RPC05T 563 J MCR03 EZH J 752 MCR03 EZH J 753
MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR MTL.FILM RESISTOR CHIP RESISTOR(1608TYPE) CHIP RESISTOR(1608TYPE)
R4,R8 R36,R52,R65 R48 R13,R15,R55,R59 R60 R38,R39,R45,R46 R29,R31 R30,R32
2 3 1 4 1 4 2 2
13279918 F3239402
RK0971110 250KC RD901-20-15K-B15 100KB
POTENTIOMETER
POTENTIOMETER
VR1,VR2,VR3 (E,LEVEL , EQ , RATE) VR4 (DEPTH)
3 1
13549329M0 13639546M0 13639550M0 13639549M0 13639602M0 13639601M0 01674701 02450767 01674612 01674478 01674523 01674534 01674578 02456534 01674667 01674689 01674334 01674389 01674390 01674423
ECQ-B1H104KF3 0.1/50V ECEA1CKA100B 10 10UF/16V ECEA1CKA101B 100UF/16V ECEA1CKA470B 47UF/16V ECEA1HKA010B 1UF /50V ECEA1HKAR47B 0.47/50V ECJ1VF1E104Z 0.1UF/16VK ECJ1VB1E183K ECJ1VB1H103K ECJ1VB1H122K ECJ1VB1H272K ECJ1VB1H332K ECJ1VB1H682K ECJ1VF1C334Z ECJ1VF1H333Z ECJ1VF1H473Z ECUV1H101JCV ECUV1H221JCV ECUV1H271JCV ECUV1H471JCV
POLYEST. CAPACITOR CHEMICAL CA CAPACITOR CHEMICAL CAPACITOR CHEMICAL CAPACITOR CHEMICAL CAPACITOR CHEMICAL CAPACITOR CERAMIC CAPACITOR(CHIP) CERAMIC CAPACITOR CERAMIC CAPACITOR CERAMIC CAPACITOR CERAMIC CAPACITOR CERAMIC CAPACITOR CERAMIC CAPACITOR CERAMIC CAPACITOR CERAMIC CAPACITOR CERAMIC CAPACITOR CERAMIC CAPACITOR CERAMIC CAPACITOR CERAMIC CAPACITOR CERAMIC CAPACITOR
C8 C1,C7,C17,C35,C47,C48 C27,C32,C33 C14,C36,C53 C2,C16 C13,C54 C10,C25,C26,C34,C37 C21,C23 C28,C30,C46,C49,C50 C55 C12,C15 C19,C22 C3,C5 C24,C29 C56 C20,C31 C4,C9 C41,C42 C11,C18 C38,C39
1 6 3 3 2 2 5 2 5 1 2 2 2 2 1 2 2 2 2 2
G3477101
FLAT CABLE
H5029820 H5029325 H5039205 H5039510 H501941301 H5039104 22137709 H5039401 H5039521 H5039112 40010267 40010901
SCREW M3X10 SCREW 3X6 WASHER 12.5X9.5X0.5/0.9 NUT M9X12X2 SCREW 3X10MM JACK WASHER M9.2X14X1.6 JACK SPACER M9.6X14X1.0 NYLON WASHER 3X6X0.5 VR ACCESSORY NUT M7 WASHER M9 SCREW M3X10 SCREW M3X6
G2627738 2262770603
INNER BOX PACKING CASE
POTENTIOMETER
CAPACITOR
WIRING,CABLE
1
SCREWS
THUMB SCREW PAN HEAD TAPTITE-2 BZC INTERNAL TOOTH FENI FENI BINDING MACHINE FEBC AL
BINDING FE BZC BINDING BI BZC
1 5 3 3 2 2 1 2 4 3 2 4
PACKING
#
1 1
MISCELLANEOUS
G253751603 40016512 2226733300 2253753801 2216756000 2215770201 2217710900 F3419102 H2369402
BOTTOM CAUTION PSA INSULOK TIE CUSHION PSA CAUTION INSULATION SHEET PEDAL GUIDE BUSH COIL SPRING BATTERY CONNECTOR POLYCA PIPE M3X6X6
FCC/CE/C-TICK/EMC GRY 80M/M T-18S 267-333 253-538 216-560 215-702 214-109
1 2 1 1 1 1 1 1 1
OWNER’S MANUAL OWNER’S MANUAL Dry Battery
JAPANESE ENGLISH
1 1 1
ACCESSORIES (Standard)
# #
6
G601721603 G601721501 ********
CH-1(T)
THE INSPECTION METHOD Output waveform check 1.
Connect an oscillator to the INPUT jack, and input test signal.
2.
Connect an oscilloscope to the OUTPUT A jack.
3.
Check that the minimum and maximum values for the delay time are as follows.
fig.check1
INPUT
SET CONTROLS
OUTPUT Waveform Minimum DELAY TIME Check OK : 3.6mS~4.4mS
30Hz 200mVp-p
(RANGE:1mS/DIV,, 100mV/DIV) (RANGE:1mS/DIV Maximum DELAY TIME Check OK : 7mS~8mS
30Hz 200mVp-p
(RANGE:1mS/DIV,, 100mV/DIV) (RANGE:1mS/DIV
. Residual noise check 1.
Connect a 47kΩ short plug to the INPUT jack.
2.
Connect a noise meter to the OUTPUT A jack.
3.
Measure the noise and check that it is -95dBu(IHF-A) or lower.
fig.check2
INPUT
SET CONTROLS
OUTPUT Waveform
Noise Check OK : < -95dBu(IHF-A) 47k ohm Short Plug
7
May 2002
CIRCUIT BOARD fig.circit
View from component side
fig.circit
View from foil side
8
CH-1(T)
CIRCUIT DIAGRAM fig.circit B T U P T U 2 3 1 O
A T ) U O P N T O U 2 3 1 M O (
D 2 1 4 6 0 2 J T K J H
5 3
7
Y R G
T H W
5
1 k R 1
U L B 3
D 2 1 4 6 0 J 3 T K J H
) 0 Y 0 S 7 S 8 A 0 6 7 D 0 2 0 R 9 2 A O 3 2 O 4 B 4 B 2 C K 5 P J 7 (
K C E H C
8 1 k R 1
1
8 6 3 0 C 0 . 0
1
p 0 4 0 C 1
k 5 0 R 1
3 k 1 7 R 4
2
A
-
+
2
M B 2 2 0 A M 2 J C I N
+ Y 9 1 7 8 K 4 S Q 2
O I V
9 k 3 6 R 5
A
) Y 2 / S 1 S 1 A 0 D 2 7 1 R 2 0 9 A 0 2 O P G B 3 4 B N I 4 C 2 A P 5 ( M 7
A
3
p 9 0 3 7 C 4
1 0 0 5 . C 0
R 1
+
2
6 k 4 6 R 5
1 1
7 4 1 0 3 . C 0 1
V 3 8 5 M A
R G 6 1 1 4 C 8 S Q 2
3
5 5 3 S 3 S D 1
3
7 1
6 0 5 0 R 1
1
V 8 A +
2
3
2
D T N H G W K C A J N I
1
N R G
A
1 0 3 1 S A S D 1
4 0 2 4 1 0 W M S J
9 8 3 1 1 B S 6 . 5 k 2 8 D 4 . 1 D R R 1
V 9 A +
k 1 0 2 0 R 1
7 6 1 1 / C 0 1
6 1 1 / C 0 1
1
G R O
7
k 0 3 0 R 1
Y ) 0 S 0 S 6 A 9 D 0 4 7 R 0 1 A 0 9 L 2 O 3 2 B 4 2 B D 4 2 C E 5 P L 7 (
L S D H 1 4 D 3 E L L
k 1 0 4 0 R 1
A
p 2 0 4 2 C 2
A
p 1 0 4 2 C 2
2
2
5 5 3 S 4 S D 1
Y 9 7 1 8 K 2 S Q 2
3
7 k 1 8 R 1
7 4 0 0 2 . C 0
1
2
6 M R 1 0 5 / 2 C 1
V 8 A +
R G 6 1 1 4 C 5 S Q 2
k 8 0 2 0 R 1
R G 6 1 1 4 C 7 S Q 2
k 0 0 4 0 R 1
5 k 4 6 R 5
A
1
8 k 3 6 R 5
V 8 A +
2
A 3
2
1
k 3 0 3 0 R 1
0 2 M R 1
0 6 5 1 / C 1
p 8 0 3 7 C 4
4 3 M R 1
3
4 2 M R 1
2
k 4 7 R 2
A
+
6 1
M B 2 2 0 C M 2 J C I N
A 8
-
M B 2 2 0 C M 4 J C I N
1
A 8
-
4
+
-
7 2 0 2 0 1 . C 0 7 2 0 5 0 1 . C 0
k 9 0 R 1
6 k 1 8 R 1
3 3 0 9 0 1 . C 0
D
2 k 2 2 R 2
D
3 2 3 2 0 k k C 0 . 5 . 5 0 7 7
8 1 0 . 0
8 1 0 . 0
1 2 C
3 2 C
3 9 3 2 . C 0 k 5 . 7
N I 1 F P L
T U O 1 F P L
B C T N I T F N U 2 U O F O O 2 P 2 H F L F C P P E L L
J D
D D N N
C F 1 C E G G C A _ C V R A D N F I
N I 2 P O
+
1 7 k R 1
Y S A E / E M T O D S D C D E O u V T M
1 L E D / Q E R
2 L E D / K C E S
1 0 0 3 . C 0
0 1 1 . C 0
D
R G 6 1 1 4 C 9 S Q 2
1
3
3
3 k 4 5 R 1
R G 6 1 1 4 0 C 1 S Q 2
k 8 0 5 2 R 1 3
p 0 9 0 C 1
V 5 +
6 1 2 . C 0
V 8 + A
5
+
3
T U O
5 1 k 7 R 4
8 6 5 0 C 0 . 0
V 0 . 4 + A
6 1 / 7 0 2 0 C 1
3
k k 2 0 7 0 R 1 A R 1
M O C
3 C N I I
0 3 5 1 / 7 C 4 . 0
1 * 2
1
3
4 1 M R 1
) P ( 1 8 . C 0
Y G S 0 5 2 1 8 6 C I S
D 1
2 *
T U O 1
N I 2
5 k 3 0 R 1
5 1 2 . C 0
1
6 1 / 3 0 3 0 C 1
6 1 2 / 3 0 0 C 1
Y R G
6
D 3 1 4 6 0 J 1 T K J H
V 5 +
P F A 3 2 A 2 + 5 5 C 2 I 3 M
2 G D 1 S G
1
4
1 R E T *
) 2 V R ( L A N I M R E T _ H T R A E
0 1
9
9
1 1
1 1
+
2 1
7
5 k 5 7 R 4
4
1 9 0 4 . C 0
6
) 2 V R ( L A N I M R E T _ H T R A E
0 1
X A 3 M
D
A
+
2 1
H
B k T 4 0 R 0 P V 1
2
3 k 6 5 R 1
D 8
-
8
1 N I M N I 1 M
E D E
C k 3 0 T R 5 V 2 A
2
A
0 3 2 R 1 2 1 3 O 0 0 T 7 P 4 A 0 C 4 C D E K A A J H
3 X A
R
M
P F A 3 2 B 2 5 5 5 C I M
k 2 0 6 0 R 1
0 3 1 5 / 7 C 4
D
1 k 6 5 R 1
6 6 k 0 R 1
D
V 5 +
2
1 R E T *
D E R
L E Y
BLK
2 3 1
T U P N I
V 9 + A
A
N R B
P F A 3 2 C 2 5 5 C I M
8
1
2 k 5 3 R 3
6 5 1 3 / 0 C 1
D
k 8 0 6 2 R 2
-
7 6 4 1 / C 0 1
+
2
6 8 1 4 / 0 C 1
7 k 3 0 R 1
R G 6 2 1 1 4 1 C 6 S Q 2 3 6 4 3 k 3 3 1 . R 3 C 0
D
M O C
9 k 1 0 R 1
2 k 1 0 R 1
1 6 0 4 . C 0
0 k 6 6 . R 5
D
0 6 1 3 / 7 C 4
A 2
D
5 k 6 3 R 3
M 7 B 2 2 0 B M - + 2 J C I N
) 2 / 2 1 0 2 7 2 9 2 G B C P (
2
1
2
1
7 1 3 . C 0
3 1
D
D
6
R G 0 8 8 K 3 S Q 2
2
7 k 2 0 R 1
0 1 4 / 1 7 C 4
1 *
V 8 + A
1 0 3 2 S A S D 1
E
2
1
8 0 4 7 R 4
V 5 +
1
9 k 5 7 R 4
) S 3 8 3 2 1 0 9 6 0 5 2 5 S F ( E
C k 2 0 Q R 5 V 2
1 O L
) B k 7 4 ( X 4 S 1 C D * A 3 0 1 3 T H R R
V 5 +
3 L E D / A T A E D T E U S M
I 3 H 2
3 1
0 1 1 N I T 0 C C C C 1 U P O C G C G O 1 P O
1 2 3 4 5 6 7 8 9 0 1 2 3 4 1 1 1 1 1
2
4 1
+
2 1 0 5 0 5 . C 0 A
9 6 M R 1
8 7 6 5 4 3 2 1 0 9 8 7 6 5 2 2 2 2 2 2 2 2 2 1 1 1 1 1
3
4 1
1 N I M
0 7 M R 1
D
2 k 3 5 R 7
1 3 R
3
M 6 5 B 2 2 - + 0 B M 4 J C I N 7
1 8 2 0 . C 0
9 0 2 3 R R
6 k 2 2 R 1
p 8 0 1 7 C 2
4 3 2 3 . C 0
D
5 k 2 0 R 1
3 k 2 0 R 1
p 1 0 1 7 C 2
8 A
5 1
M B 2 2 0 A M 4 J + C I N
3 3 6 0 5 . C 0
0 5 / 7 4 4 5 . C 0
0 k 1 0 R 1
k 8 7 R 2
5 1
L E V E L . E
+
6 1 / 7 0 C 1
6 1 / 6 0 C 0 1
C k 1 0 R 5 V 2
4
2
1 k 1 2 R 1
6 1 2
V 8 + A
+
X A 3 M
+
V 8 + A
R G 4 2 3 3 C 1 V S Q 2
3 T 0 5 L 1 0 2 7 U J N r o g Y n i G t n S u 0 o 5 2 M 1 o 8 N S : : 1 2 * *
1
2
P 1 6 T 0 B 0 V 9
9
