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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 PEDA