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May 2002
CH-1(T)
SERVICE NOTES Second Edition
SPECIFICATIONS............................................................. 2 LOCATION OF CONTROLS,PARTS LIST ................... 3 EXPLODED VIEW,PARTS LIST ..................................... 4 PARTS LIST........................................................................ 5 THE INSPECTION METHOD ........................................ 7 CIRCUIT BOARD.............................................................. 8 CIRCUIT DIAGRAM........................................................ 9
Issued by RJA
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 to "CH-1 SERVICE 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 battery life under continuous 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 MANUAL 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 = 0.775 Vrms In the interest of product improvement, the specifications and/or appearance 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 13279918 2221758901 13449150MF 2235730400 H5029820 752443C000 752442T000 F3449112 2247738600 F3239402 1502928100 13449711 2253753801 2202785100 2235730500 G253751603
PART NAME KNOB POTENTIOMETER (E.LEVEL/EQ/RATE) 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 RK0971110 250KC HTJ-064-12D 235-304 3X10MM
HTJ-064-13D 247-386 RD901-20-15K-B15 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
b
8
3
7
6 c
4
5
[PARTS]
No. 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 Q'TY 1 1 1 1 1 1 1 1 1 1
[SCREW]
No. a b c d 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
4
CH-1(T)
PARTS LIST
fig.part1e
SAFETY PRECAUTIONS: The parts marked have safety-related 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
# # #
KNOB,BUTTON 2247738600 KNOB 247-386 (GRAY) 4
SWITCH 13129710 JM-0404 SWITCH (PUSH) SW1 1
JACK,EXT TERMINAL 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
PWB ASSY # # #
752443O000 752443L000 752443P001
JACK BOARD ASSY LED BOARD ASSY MAIN BOARD ASSY
CH-1A CH-1A CH-1A
1 1 1
IC 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
TRANSISTOR 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
DIODE 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
RESISTOR 00567023 00567156 00567289 00567412 00567556 00567290 00567423 00567301 00567189 00567312 00567323 00567456 RPC05T 101 J RPC05T 102 J RPC05T 103 J 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 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 1 3 13 7 8 2 1 3 1 2 1 1
5
May 2002
RESISTOR 00567334 00567345 00567112 00567378 00567256 00567389 01892767 01892989 POTENTIOMETER 13279918 F3239402 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
RK0971110 250KC RD901-20-15K-B15 100KB
POTENTIOMETER
POTENTIOMETER
VR1,VR2,VR3 (E,LEVEL , EQ , RATE) VR4 (DEPTH)
3 1
CAPACITOR 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 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 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
WIRING,CABLE G3477101 FLAT CABLE 1
SCREWS 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 THUMB SCREW PAN HEAD TAPTITE-2 BZC INTERNAL TOOTH FENI FENI BINDING MACHINE FEBC AL 1 5 3 3 2 2 1 2 4 3 2 4
BINDING FE BZC BINDING BI BZC
PACKING # G2627738 2262770603 INNER BOX PACKING CASE 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
ACCESSORIES (Standard) # G601721603 # G601721501 ********
OWNER'S MANUAL OWNER'S MANUAL Dry Battery
JAPANESE ENGLISH
1 1 1
6
CH-1(T)
THE INSPECTION METHOD
Output waveform check
1. 2. 3. Connect an oscillator to the INPUT jack, and input test signal. Connect an oscilloscope to the OUTPUT A jack. 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) Maximum DELAY TIME Check OK : 7mS~8mS
30Hz 200mVp-p
(RANGE:1mS/DIV, 100mV/DIV)
. Residual noise check
1. 2. 3. Connect a 47k short plug to the INPUT jack. Connect a noise meter to the OUTPUT A jack. 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
fig.circit
+
A8V
1
3
Q1 2SC3324GR C1 10/16 R1 1k
OUTPUT B
5 3
2 3 1
2
5
GRY
R2 10k C2 1/50
2 A +5V C6 100/16 1
R4 27k
Q2 2SK879Y
R5 10k
C3 0.0068
R3 100k
A
3 BLU
JK2 HTJ-064-12D
2
BRN 1
C10 0.1
8 VCC REF 2 1 + + 3 + 1 2 A GND A D GND NC F_ADJ uCOM/EASY VDD TEST OP1 IN 20 OP2 IN 21 LPF2 OUT 22 A 2 LPF2 IN 23 LPF2 OUT 24 NC ECHO FB D 4 26 LPF1 OUT 27 + LPF1 IN 2 1 2 3 28
INPUT
IC1
+
1
2 3 1
R12 10k C11 270p R16 18k C15 0.0027 C12 0.0027 D4 1SS355 Q4 2SK879Y C17 10/16 R21 100k
A
C8 0.1(P) R13 47k
R9 10k
R10 10k
R11 12k
C7 10/16
A8V
3
C13 0.47/50
R15 47k
C9 100p
JK1 HTJ-064-13D
D
GRY
C14 47/10 R20 1M
3 1 4 5 6 7 8 25
2
+
R14 1M
6
-
7
IC2C NJM022BM
R18 1k
C16 1/50
1 3
Q3 2SK880GR +
A8V
C5 0.0068
R7 10k
R8 27k
*1
+
R6 1M
C4 100p
R17 18k
A
R19 10k C18 270p R23 10k R26 12k R25 10k C19 0.0033 D3 1SS355 R24 1M C20 0.047 R22 22k
+
5
7
WHT
7
OUTPUT A (MONO)
2 3 1
+
IC2B NJM022BM IC2A NJM022BM
A
*1
C21 0.018
IC3
JK3 HTJ-064-12D
2
COM
CIRCUIT DIAGRAM
IN
OUT
3
1
A8V
C23 0.018
D 2
JK BOARD ASSY 752443O000
DA1 1SS301
3
YEL
R27 10k
10 MODE OP1 OUT 19
D
9
6
R29 7.5k
3 18 11 REQ/DEL1 CC0
*2
R30 75k
17 1 2 1 16 15
IC6 S-81250SGY Q5 2SC4116GR
+5V
C22 0.0033
R28 + 100k
(PCB 2292768700)
2 12 SECK/DEL2 GC0 13 SEDATA/DEL3 MUTE GC1 CC1 14
COM
IN
OUT
3
1
BT1 9V 006P
C28 0.01
D D
C25 0.1 R33 100k
1
2
1
AC ADAP TOR
C37 0.1
+
D2 GS1G
C34 0.1
R37 10k
A8V
C38 470p R38 56k R40 100k
3
A8V
1
2 +
A 2 + 8
C32 100/16
C35 10/16
C33 100/16
C36 47/10
*1
R43 15k
3 7 D + 1 4 + A 5 -
A8V
DA2 1SS301
6
R41 100k Q7 2SC4116GR
1 2 1 3
R39 56k
R42 1.8k Q8 2SC4116GR
2
1
TER1 C54 0.47/50
EARTH_TERMINAL(RV-2)
+5V
18
2 LED BOARD ASSY
R45 56k
A A
8
*1
IC4B NJM022BM
R69 1M + R48 470
3
IC4C NJM022BM
TER2
EARTH_TERMINAL(RV-2)
-
+
IC5C M5223AFP
C41 220p
C42 220p
R46 56k
A
752443L000 (PCB 2291749600)
A
A 1 2 2 1 + 3 D +5V
D
4
D
R52 33k Q9 2SC4116GR C56 0.033 R59 47k
+
R55 47k R58 120k C55 0.0012
3 A 2
C47 10/16
C48 10/16
+
A8V
R53 1M R56 100 SW1 JM-0404
C49 0.01 R70 1M
3 1
2
IC4A NJM022BM
17
VIO
+5V
-
1
1
6 1 2
-
3
2 2
2
2
2
3
1
1
3
1
3
1
2
BLK
R31 7.5k C24 0.33 R32 75k
C26 0.1
C27 100/16
D
A9V
(F5209133)
R34 1M
D
A8V
C30 0.01
ES56028S
C29 0.33
JK4 HEC0470-01-230
+
+
Q6 2SC4116GR
3
2
A4.0V
C31 0.047
+ A
A9V
+
2 1 3
R36 33k
R35 10k
RED 4
D1 RD5.6SB3 C39 470p
19
ORG GRN
1
CHECK
LED1 L-34HDSL
7
+
5
R60 5.6k R65 33k R71 1k
D
R61 15k
R62 100k
+
R63 15k
IC5A M5223AFP
Q10 2SC4116GR
RT1 RH03ADCS4X (47kB)
*1
C50 0.01
A
WHT IN JACK GND
IC5B M5223AFP
R66 10k R68 220k
D
C53 47/10 C46 0.01
D
D
MAIN BOARD ASSY 752443P001 (PCB G2927201 1/2)
13 14 15 16 13 14 15 16
12
11
9
10
8
12
11
9
10
8
*1 : No Mounting *2 : S-81250SGY or NJU7201L50-T3
3
MAX
MIN
MIN
MAX
LO
HI
VR2 250kC
MIN
MAX
VR1 250kC
VR3 250kC
VR4 100kB
RATE
DEPTH
(PCB G2927201 2/2)
EQ
E.LEVEL
CH-1(T)
9