This document provides a service manual for a guitar amplifier. It includes specifications for the amplifier, diagrams of the panel layout and circuit boards. The manual also provides a block diagram of the circuitry and step-by-step instructions for disassembling parts of the amplifier, including removing the speaker, main circuit boards, and power transformer. Inspection procedures are outlined to test the functionality of controls like volume, tone, and input/output channels.
This document is a service manual for the Victor Company of Japan's AX-V8000 audio/video control amplifier. It provides instructions on disassembling various components of the amplifier for repair purposes. Sections include removing covers, panels, and boards, disconnecting wiring connectors, and cautionary notes regarding safety-critical components. Detailed steps and diagrams are given to guide the disassembly process.
This document provides specifications and service information for several Panasonic color television models, including the TC-20G12P, TC-29G12P, and TC-29G12PU. It includes details on electrical specifications, dimensions, weight, tuning systems, audio and video connections and capabilities, remote control specifications, service adjustments, schematics, and parts lists. Safety procedures and precautions for servicing the televisions are also provided.
This document contains a service manual for LTW32AC/CF/DF television models. It includes sections on specifications, control locations, remote control operation, alignment procedures, technical information on various integrated circuits, troubleshooting tips for issues like no power, no picture or no sound, block diagrams and printed circuit board layouts. The technical information sections provide pinout diagrams and descriptions of functions for different ICs used in the television.
Manual de mantenimiento y repAracion KRV127R_SM_KENWOOD.pptxGee Diaz
This document provides instructions for disassembling an audio/video receiver for repair. It describes removing the front panel, display units, rear panel, and circuit boards. Circuit diagrams and component descriptions are also included to aid in troubleshooting and repair. The document contains detailed technical information on the internal components and assembly of the receiver.
1. The document is a service manual that provides specifications and adjustment procedures for a colour television.
2. It includes block diagrams of the chassis and ICs, safety notices, a parts list, and an on-screen service menu table with initial values and adjustment ranges for various service menu items.
3. The service menu can be accessed by pressing buttons on the remote while holding the TV menu button, and allows remote adjustment of items like colour balance, geometry, etc. The adjusted values are stored in memory.
This document is a service manual for the Sony STR-K660P FM stereo FM-AM receiver. It provides specifications for the receiver including power output ratings for the front, center, surround, and subwoofer channels. It also lists tuning ranges for the FM and AM tuner sections. The document outlines safety checks that should be performed on the receiver before being released to a customer, and provides circuit board layout diagrams, schematic diagrams, parts lists, and other technical details for servicing the receiver.
Buy the Edwards Signaling 2452THS-1575-W at JMAC Supply.
https://www.jmac.com/Edwards_Signaling_2452THS_15_75_W_p/edwards-2452ths-15-fslash-75-w.htm?=slideshare
This document is a service manual for the Victor Company of Japan's AX-V8000 audio/video control amplifier. It provides instructions on disassembling various components of the amplifier for repair purposes. Sections include removing covers, panels, and boards, disconnecting wiring connectors, and cautionary notes regarding safety-critical components. Detailed steps and diagrams are given to guide the disassembly process.
This document provides specifications and service information for several Panasonic color television models, including the TC-20G12P, TC-29G12P, and TC-29G12PU. It includes details on electrical specifications, dimensions, weight, tuning systems, audio and video connections and capabilities, remote control specifications, service adjustments, schematics, and parts lists. Safety procedures and precautions for servicing the televisions are also provided.
This document contains a service manual for LTW32AC/CF/DF television models. It includes sections on specifications, control locations, remote control operation, alignment procedures, technical information on various integrated circuits, troubleshooting tips for issues like no power, no picture or no sound, block diagrams and printed circuit board layouts. The technical information sections provide pinout diagrams and descriptions of functions for different ICs used in the television.
Manual de mantenimiento y repAracion KRV127R_SM_KENWOOD.pptxGee Diaz
This document provides instructions for disassembling an audio/video receiver for repair. It describes removing the front panel, display units, rear panel, and circuit boards. Circuit diagrams and component descriptions are also included to aid in troubleshooting and repair. The document contains detailed technical information on the internal components and assembly of the receiver.
1. The document is a service manual that provides specifications and adjustment procedures for a colour television.
2. It includes block diagrams of the chassis and ICs, safety notices, a parts list, and an on-screen service menu table with initial values and adjustment ranges for various service menu items.
3. The service menu can be accessed by pressing buttons on the remote while holding the TV menu button, and allows remote adjustment of items like colour balance, geometry, etc. The adjusted values are stored in memory.
This document is a service manual for the Sony STR-K660P FM stereo FM-AM receiver. It provides specifications for the receiver including power output ratings for the front, center, surround, and subwoofer channels. It also lists tuning ranges for the FM and AM tuner sections. The document outlines safety checks that should be performed on the receiver before being released to a customer, and provides circuit board layout diagrams, schematic diagrams, parts lists, and other technical details for servicing the receiver.
Buy the Edwards Signaling 2452THS-1575-W at JMAC Supply.
https://www.jmac.com/Edwards_Signaling_2452THS_15_75_W_p/edwards-2452ths-15-fslash-75-w.htm?=slideshare
The document provides safety instructions for installing an AC motor drive. It states that power must be disconnected before wiring, capacitors can hold hazardous voltages even after power is turned off, and sensitive components can be damaged by static electricity. It instructs the user to ground the drive properly, not install it in hot or hazardous areas, and only allow qualified persons to perform installation and maintenance.
Panasonic SA-AK450P SA-AK450PC - Manual de servicioAnonimo Goncen
This document summarizes the specifications of an audio system including:
1) Amplifier section with FTC output power up to 380W and RMS output power up to 460W.
2) Tuner section with 20 FM and 15 AM presets, FM sensitivity of 4.0uV, and AM sensitivity of 560uV/m.
3) Cassette deck section with a 4 track, 2 channel design and frequency response of 35Hz to 14kHz.
Catalog cs contactor d range
C&S,
Catalog C&S,
Catalog Thiết Bị Điện C&S,
Catalog Điện Công Nghiệp C&S,
http://dienhathe.com,
Xem thêm các sản phẩm khác của Autonics tại https://dienhathe.com
Để nhận báo giá sản phẩm vui lòng gọi: 0907.764.966
Catalog cs contactor d range-dienhathe.vnDien Ha The
This document provides contact information for the corporate office and marketing offices of C&S Electric Ltd, an Indian manufacturer of electrical equipment. It lists the addresses, phone numbers, fax numbers and emails for the central marketing office in New Delhi and the international business division. It also provides a brief description of C&S Electric Ltd and links to their website.
Catalog cs contactor d range
Catalog CS,
Catalog Thiết Bị Điện CS,
Catalog Điện Công Nghiệp CS,
http://dienhathe.com,
Xem thêm các sản phẩm khác của CS tại https://dienhathe.com
Để nhận báo giá sản phẩm CS vui lòng gọi: 0907.764.966
This document provides instructions for unpacking, installing, and setting up a telecom power outdoor system. It includes steps for unpacking cabinets and components without separate packaging. It also details installing AC and battery power, connecting telecom equipment, and performing initial system checks. The document describes configuring the system controller to set parameters like date, time, battery capacity and alarm points. It provides an overview of alarm indications and functions of the controller interface.
This document provides a selector guide for ON Semiconductor's bipolar power transistors. It lists the transistor product lines by package type, including key electrical parameters such as current range, voltage range, power dissipation, and switching times. The guide then provides tables of specific transistor part numbers organized by current rating and package type. The tables include additional parametric data for each transistor type. The document is a reference for engineers to select appropriate bipolar power transistors from ON Semiconductor's product portfolio based on electrical requirements and package needs.
Fed e-quick-start-manual-bientanfuji-dienhathe.comDien Ha The
This quick start guide provides instructions for setting up and operating an inverter. It begins with an overview of product information, including nameplate details and specifications. It then covers wiring, including diagrams for 3-phase and single-phase power supply types. Terminal functions are described for the main circuit and control circuit. The guide presents a timing diagram for the control logic and acceleration/deceleration profiles. It concludes with a step-by-step setup process, including getting familiar with the keypad, setting motor parameters, checking rotation direction, and setting function codes for features like the startup frequency and DC injection braking.
This document provides service information for the HCD-GTX88 CD receiver, including:
1. A list of key components and their model names.
2. Specifications for the amplifier, disc player, tape deck, tuner, USB, and general sections.
3. Safety warnings and notes for handling components like the optical pickup.
4. Instructions for identifying the model by its label and part number.
Original High Current NPN Transistor BC639 639 TO-92 New ON SemiconductorAUTHELECTRONIC
This document provides specifications for the BC637, BC639, and BC639-16 NPN silicon high current transistors. It includes maximum ratings, electrical characteristics, thermal characteristics, and ordering information for the transistors. Key specifications include a collector-emitter voltage rating of 60-80V, continuous collector current of 1A, current gain of 25-160, and frequency bandwidth of up to 200MHz. The document also contains figures illustrating characteristics like safe operating area, current gain, and voltage/temperature coefficients.
This document contains parts lists and exploded views for the Pioneer XR-A670 and XR-A370 stereo CD cassette deck receivers. It lists 58 parts total for the exterior section including the chassis, rear panel, bonnet case, heat sinks, and screws. It also provides a contrast table noting differences between the MYXJ, NVXJ, and KUCXJ types for certain parts like the power cord, fuse, and labels. Safety information is provided at the beginning regarding proper servicing and replacement of parts with identical designations for safety characteristics.
HIOKI 9272-10 Clamp on Sensor has 1Hz to 100kHz (Phase: 5Hz to 50kHz) rated 20A/200A AC/DC. f 46 mm (1.81 in) core dia is available for Sales, Rentals , hire, Lease @ http://www.supremetechnology.com.au/product/hioki-9272-10-clamp-on-sensor.aspx?Id=2091&ProductType=Regular #testequipments #sales #rentals #hire #lease #hioki #dataacquisition #memoryrecorders #supremetechnologyandenergysolutions
This document provides instructions and specifications for a Philips color television chassis. It includes:
1. Technical specifications for the television such as reception details, connections, power requirements, and dimensions.
2. Safety and maintenance instructions, including warnings to take precautions against electrostatic discharge when working on the television and to discharge the picture tube safely.
3. Notes on measuring voltages and waveforms, maintaining the television, and schematic symbols and component value notation.
The document provides specifications for Samsung's DVM S WATER outdoor units, including the AM080FXWANR, AM100FXWANR, AM120FXWANR, and AM160FXWANR models. It lists key details like cooling and heating capacities, power consumption, compressor type, condenser type, piping connections, installation limitations, refrigerant type, sound levels, dimensions, and operating temperature ranges. The specifications are intended to help understand the performance and technical requirements of the outdoor units.
The document provides specifications for the Mitsubishi RV-1A and RV-2AJ series industrial robots. It describes the standard structural equipment that makes up the robots, including the robot arm and controller. It also covers optional equipment, maintenance parts, and the contents and specifications of the robot arm and controller components. The document is intended to help users understand the robots' characteristics and specifications.
The document provides safety instructions for installing an AC motor drive. It states that power must be disconnected before wiring, capacitors can hold hazardous voltages even after power is turned off, and sensitive components can be damaged by static electricity. It instructs the user to ground the drive properly, not install it in hot or hazardous areas, and only allow qualified persons to perform installation and maintenance.
Panasonic SA-AK450P SA-AK450PC - Manual de servicioAnonimo Goncen
This document summarizes the specifications of an audio system including:
1) Amplifier section with FTC output power up to 380W and RMS output power up to 460W.
2) Tuner section with 20 FM and 15 AM presets, FM sensitivity of 4.0uV, and AM sensitivity of 560uV/m.
3) Cassette deck section with a 4 track, 2 channel design and frequency response of 35Hz to 14kHz.
Catalog cs contactor d range
C&S,
Catalog C&S,
Catalog Thiết Bị Điện C&S,
Catalog Điện Công Nghiệp C&S,
http://dienhathe.com,
Xem thêm các sản phẩm khác của Autonics tại https://dienhathe.com
Để nhận báo giá sản phẩm vui lòng gọi: 0907.764.966
Catalog cs contactor d range-dienhathe.vnDien Ha The
This document provides contact information for the corporate office and marketing offices of C&S Electric Ltd, an Indian manufacturer of electrical equipment. It lists the addresses, phone numbers, fax numbers and emails for the central marketing office in New Delhi and the international business division. It also provides a brief description of C&S Electric Ltd and links to their website.
Catalog cs contactor d range
Catalog CS,
Catalog Thiết Bị Điện CS,
Catalog Điện Công Nghiệp CS,
http://dienhathe.com,
Xem thêm các sản phẩm khác của CS tại https://dienhathe.com
Để nhận báo giá sản phẩm CS vui lòng gọi: 0907.764.966
This document provides instructions for unpacking, installing, and setting up a telecom power outdoor system. It includes steps for unpacking cabinets and components without separate packaging. It also details installing AC and battery power, connecting telecom equipment, and performing initial system checks. The document describes configuring the system controller to set parameters like date, time, battery capacity and alarm points. It provides an overview of alarm indications and functions of the controller interface.
This document provides a selector guide for ON Semiconductor's bipolar power transistors. It lists the transistor product lines by package type, including key electrical parameters such as current range, voltage range, power dissipation, and switching times. The guide then provides tables of specific transistor part numbers organized by current rating and package type. The tables include additional parametric data for each transistor type. The document is a reference for engineers to select appropriate bipolar power transistors from ON Semiconductor's product portfolio based on electrical requirements and package needs.
Fed e-quick-start-manual-bientanfuji-dienhathe.comDien Ha The
This quick start guide provides instructions for setting up and operating an inverter. It begins with an overview of product information, including nameplate details and specifications. It then covers wiring, including diagrams for 3-phase and single-phase power supply types. Terminal functions are described for the main circuit and control circuit. The guide presents a timing diagram for the control logic and acceleration/deceleration profiles. It concludes with a step-by-step setup process, including getting familiar with the keypad, setting motor parameters, checking rotation direction, and setting function codes for features like the startup frequency and DC injection braking.
This document provides service information for the HCD-GTX88 CD receiver, including:
1. A list of key components and their model names.
2. Specifications for the amplifier, disc player, tape deck, tuner, USB, and general sections.
3. Safety warnings and notes for handling components like the optical pickup.
4. Instructions for identifying the model by its label and part number.
Original High Current NPN Transistor BC639 639 TO-92 New ON SemiconductorAUTHELECTRONIC
This document provides specifications for the BC637, BC639, and BC639-16 NPN silicon high current transistors. It includes maximum ratings, electrical characteristics, thermal characteristics, and ordering information for the transistors. Key specifications include a collector-emitter voltage rating of 60-80V, continuous collector current of 1A, current gain of 25-160, and frequency bandwidth of up to 200MHz. The document also contains figures illustrating characteristics like safe operating area, current gain, and voltage/temperature coefficients.
This document contains parts lists and exploded views for the Pioneer XR-A670 and XR-A370 stereo CD cassette deck receivers. It lists 58 parts total for the exterior section including the chassis, rear panel, bonnet case, heat sinks, and screws. It also provides a contrast table noting differences between the MYXJ, NVXJ, and KUCXJ types for certain parts like the power cord, fuse, and labels. Safety information is provided at the beginning regarding proper servicing and replacement of parts with identical designations for safety characteristics.
HIOKI 9272-10 Clamp on Sensor has 1Hz to 100kHz (Phase: 5Hz to 50kHz) rated 20A/200A AC/DC. f 46 mm (1.81 in) core dia is available for Sales, Rentals , hire, Lease @ http://www.supremetechnology.com.au/product/hioki-9272-10-clamp-on-sensor.aspx?Id=2091&ProductType=Regular #testequipments #sales #rentals #hire #lease #hioki #dataacquisition #memoryrecorders #supremetechnologyandenergysolutions
This document provides instructions and specifications for a Philips color television chassis. It includes:
1. Technical specifications for the television such as reception details, connections, power requirements, and dimensions.
2. Safety and maintenance instructions, including warnings to take precautions against electrostatic discharge when working on the television and to discharge the picture tube safely.
3. Notes on measuring voltages and waveforms, maintaining the television, and schematic symbols and component value notation.
The document provides specifications for Samsung's DVM S WATER outdoor units, including the AM080FXWANR, AM100FXWANR, AM120FXWANR, and AM160FXWANR models. It lists key details like cooling and heating capacities, power consumption, compressor type, condenser type, piping connections, installation limitations, refrigerant type, sound levels, dimensions, and operating temperature ranges. The specifications are intended to help understand the performance and technical requirements of the outdoor units.
The document provides specifications for the Mitsubishi RV-1A and RV-2AJ series industrial robots. It describes the standard structural equipment that makes up the robots, including the robot arm and controller. It also covers optional equipment, maintenance parts, and the contents and specifications of the robot arm and controller components. The document is intended to help users understand the robots' characteristics and specifications.
The Indian government has been working over the past few years to include elements of ITS in the transport sector. This standard ensures the optimal operation of the current transport infrastructure. It also increases the efficiency, safety, comfort, and quality of the system. That is why the government created the AIS-140 standard. Compliance with this standard means all vehicles used for public transit must have panic buttons and vehicle tracking modules installed. Nevertheless, in future in the standard protocol of AIS-140 you can expect fare collection and CCTV capabilities.
Get more information here: https://blog.watsoo.com/2023/12/27/all-about-prithvi-ais-140-gps-vehicle-tracker/
Google Calendar is a versatile tool that allows users to manage their schedules and events effectively. With Google Calendar, you can create and organize calendars, set reminders for important events, and share your calendars with others. It also provides features like creating events, inviting attendees, and accessing your calendar from mobile devices. Additionally, Google Calendar allows you to embed calendars in websites or platforms like SlideShare, making it easier for others to view and interact with your schedules.
Building a Raspberry Pi Robot with Dot NET 8, Blazor and SignalRPeter Gallagher
In this session delivered at NDC Oslo 2024, I talk about how you can control a 3D printed Robot Arm with a Raspberry Pi, .NET 8, Blazor and SignalR.
I also show how you can use a Unity app on an Meta Quest 3 to control the arm VR too.
You can find the GitHub repo and workshop instructions here;
https://bit.ly/dotnetrobotgithub
1. SERVICE MANUAL
HAMAMATSU, JAPAN
1.338K-713 K Printed in Japan 2001.09
011551
GA
CONTENTS
SPECIFICATIONS .............................................................................. 3
PANEL LAYOUT.................................................................................. 3
CIRCUIT BOARD LAYOUT ................................................................. 4
BLOCK DIAGRAM .............................................................................. 4
DISASSEMBLY PROCEDURE ........................................................... 5
CIRCUIT BOARDS ............................................................................. 7
IC BLOCK DIAGRAM.......................................................................... 8
INSPECTIONS .................................................................................... 8
PARTS LIST
OVERALL CIRCUIT DIAGRAM
GUITAR AMPLIFIER
This document is printed on chlorine free (ECF) paper with soy ink.
2. 2
F-20
IMPORTANT NOTICE
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 per-
sonal injury, destruction of expensive components and failure of the product to per form as specified. For
these reasons, we advise all Yamaha product owners that all service required should be performed by an
authorized Yamaha Retailer or the appointed service representative.
IMPORTANT: This presentation or sale of this manual to any individual or firm does not constitute authorization, certifica-
tion, recognition of any applicable technical capabilities, or establish a principal-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, therefor, inevitable and
changes in specification 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 parts replacement. Recheck all work before you apply power to
the unit.
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
WHAT SO EVER!
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.
IMPORTANT NOTICE FOR THE UNITED KINGDOM
Connecting the Plug and Cord
WARNING: THIS APPARATUS MUST BE EARTHED
IMPORTANT: The wires in this main lead are coloured in accor-
dance with the following code:
GREEN-AND-YELLOW: EARTH
BLUE: NEUTRAL
BROWN: LIVE
As the colours of the wires in the main lead of this apparatus may not
correspond with the coloured markings identifying the terminals in your
plug, proceed as follows:
The GREEN-and-YELLOW wire must be connected to the terminal in the
plug that is marked with the letter E or the safety earth symbol (or coloured
GREEN or GREEN-and-YELLOW).
The BLUE wire must be connected to the terminal that is marked with the
letter N (or coloured BLACK).
The BROWN wire must be connected to the terminal that is marked with
the letter L (or coloured RED).
This applies only to products distributed by Yamaha Kemble Music (U. K.) Ltd.
WARNING
Components having special characteristics are marked and
must be replaced with parts having specification equal to those
originally installed.
3. 3
F-20
Rated Output Power: 20W
Speaker: 20cm x 1
Controls: VOLUME, GAIN, MASTER VOL., TREBLE, MIDDLE, BASS, CH SELECT switch (A/B)
Input/Output Terminals: INPUT, AUX IN, PHONES
Output Impedance: 100Ω (PHONES)
Power Consumption: 30W/100V (J)
25W/120V (UL,CSA)
25W/230V (E,BS)
Power Requirements: U.S. and Canadian models: 120V, 60Hz
General model: 230V, 50Hz
Dimensions (W x H x D): 357 x 330 x 197mm (14.1" x 13" x 7.8")
Weight: 6.5kg (14 lbs 5 oz)
SPECIFICATIONS
PANEL LAYOUT
INPUT
CH SELECT A/B (Channel Select Switch A/B)
A Channel
VOLUME
* No sound is produced when the VOLUME knob is
set to 0.
B Channel
GAIN
MASTER VOL.
* No sound is produced when the MASTER VOL.
knob is set to 0.
Tone Controls
TREBLE
MIDDLE
BASS
AUX IN
* Use the volume control on the audio device to
control its volume level.
PHONES
* The speaker produces no sound when a pair of
headphones is connected to this jack.
POWER
4. 4
F-20
CIRCUIT BOARD LAYOUT
MAIN 1/2
MAIN 1/2
MAIN 1/2
AC Cord
Power Transformer
MAIN 2/2
MAIN 2/2
BLOCK DIAGRAM
+B
+12V
-12V
-B
OP AMP
IC1
3 1
OP AMP
IC2
3 1
OP AMP
IC1
5 7
OP AMP
IC2
5 7
POWER
AMP
IC3
1 4
INPUT
CH. SELECT SW
CH. A
CLEAN
IC1. IC2
CH. A
CLEAN
CH. B
DRIVE
CH. B
DRIVE
+B
VOLUME
GAIN
MASTER
FUSE
FZ1
INDICATOR
BASS
MIDDLE
TREBLE
PASSIVE TYPE
TONE CONTROL
POWER SUPPLY CIRCUIT
POWER TRANSFORMER
VR1
VR2
VR3
VR4 VR5 VR6
4Ω Speaker
PHONES
AUX IN
CN2 4P
CN1
2P
CN3
3P
CN4
5P
CN5
5P
POWER SWITCH
SW1
SW2
T2
T1
T4
T1
T2
G
U, C, S, BS
MAIN 1/2
MAIN 2/2
T3
+12V
-12V
+12V
-12V
+12V
-12V
+12V
-12V
+B
-B
JK3
JK2
JK1
V695450
Top View Side View
Front View
5. 5
F-20
DISASSEMBLY PROCEDURE
[30] x 4
Speaker
[B]
Pre-Main Unit
Pre-Main Unit
[A] Back Board
1. Pre-Main Unit (Time required: about 1 min)
1-1 Remove the speaker wires.
1-2 Remove the four (4) screws marked [30]. The pre-main unit can then be removed by sliding it backward. (Fig.1)
2. Speaker (Time required: about 1 min)
2-1 Remove the four (4) screws marked [A]. The back board can then be removed. (Fig.1)
2-2 Remove the four (4) screws marked [B]. The speaker can then be removed. (Fig.1)
3. MAIN 1/2 Circuit Board (Time required: about 3 min)
3-1 Remove the pre-main unit. (See procedure 1)
3-2 Remove the six (6) knobs marked [P100] and the six (6) hexagonal nuts marked [C]. (Fig.5)
3-3 Remove the hexagonal nuts marked [A120] and the hexagonal nuts marked [A140]. (Fig.5)
3-4 Push the hooks of the spacer support (at the arrow symbol area of illustration) with a needle-nose plier to unlock.
The Main 1/2 circuit board can then be removed. (Fig.2)
[30]: Truss Head Screw 4.0X25 MFZN2BL (VN347600)
(Fig. 1)
MAIN1/2 Circuit Board
MAIN1/2 Circuit Board
Needle Nose Plier
Needle Nose Plier
MAIN1/2 Circuit Board
[P40]
[P40]
[P40]
Needle Nose Plier
(Fig. 2)
[A]: Bind Head Tapping Screw 4.0X25 FCRM3-BL (EI340256)
[B]: Bind Head Screw 4.0X20 ZMC2BL (VB403600)
6. 6
F-20
MAIN 1/2
MAIN 2/2
[P100], [C]
[A120]
[P60]
[P70]
[C80]
[A140]
[P70]
[P60]
[P40] [P40]
Power Transformer
4. MAIN 2/2 Circuit Board (Time required: about 3 min)
4-1 Remove the pre-main unit. (See procedure 1)
4-2 Remove the screw marked [C80]. The MAIN 2/2 circuit board can then be removed. (Fig.5)
5. Power Transformer (Time required: about 4 min)
5-1 Remove the pre-main unit. (See procedure 1)
5-2 While pushing down the nut marked [P70] with a spanner, remove the two (2) screws marked [P60]. The power
transformer can then be removed. (Fig.4)
[A120]: Hexagonal Nut 9.0 12X2 MFNI33 (LX200060)
[A140]: Hexagonal Nut 12.0 14X2 MFNI33 (ES200210)
[C80]: Bind Head Tapping Screw-1 3.0X16 MFZN2BL (EP030310)
[P70]: Hexagonal Nut #1 4.0 MFZN2Y (VB837300)
[P60]: Pan Head Screw 4.0X10 MFZN2BL (V7018000)
[P100]: Knob (V6955100)
(Fig. 5)
[P60]
[P70] [P60]
[P70]
Power Transformer
ransformer
Power Transformer
(Fig. 4)
[C80]
[C80]
MAIN1/2 Circuit Board
MAIN2/2 Circuit Board
MAIN1/2 Circuit Board
MAIN2/2 Circuit Board
(Fig. 3)
7. 7
F-20
A
INPUT
CH
SELECT
A/B
VOLUME GAIN MASTER VOLUME TREBLE
A'
A
MIDDLE BASS AUX IN PHONES
A'
to Speaker
from Power Cord
to Power Transformer
to Main 2/2 CN5
from Power Transformer
MAIN1/2 Circuit Board
CIRCUIT BOARDS
MAIN 1/2 (J, U): CNA-V733720 1
MAIN 1/2 (H, B): CNA-V733730
MAIN 2/2 (J, U): CNA-V733720
MAIN 2/2 (H, B): CNA-V733730
to MAIN 1/2 CN4
MAIN 2/2 Circuit Board
Component Side
Component Side
VERSION
FUSE
RATE
INDICATION
J, U 250V 500mA
E, BS 250V T160mAL
Must be
erased
Must be
erased
8. 8
F-20
INSPECTIONS
1. Preparation
To inspect the main unit, the following jigs are required.
CD player
Headphones
Before turning the power on, set all the knobs on the panel to 0.
Raise the CH SELECT switch to select channel A.
2. Power supply
Connect the power cord to the suitable power supply socket for each version.
(UC - 120V, EBS - 220V)
3. Inspection procedure
3-1 Input the audio signal of CD player to the AUX-IN jack.
3-2 Make sure that the sound becomes gradually larger (or smaller) according as you turn the VOLUME knob to the
right (or left).
3-3 Make sure that the high frequency is gradually emphasized (or eliminated) as you turn the TREBLE knob to the
right (or left).
3-4 Make sure that the middle frequency is gradually emphasized (or eliminated) as you turn the MIDDLE knob to
the right (or left).
3-5 Make sure that the low frequency is gradually emphasized (or eliminated) as you turn the BASS knob to the right
(or left).
3-6 Make sure that the sound becomes larger when you depress the CH SELECT switch to select channel B.
Besides, make sure that the sound becomes gradually distorted according as you turn the GAIN knob to the right.
3-7 Make sure that the sound becomes gradually larger (or smaller) according as you turn the MASTER VOLUME
knob to the right (or left).
3-8 Raise the CH SELECT switch to select channel A and make sure that the audio signal sounds over the speaker.
3-9 Connect headphones to the PHONES jack. Make sure that the speaker does not produce any sound and audio
signal sounds over the headphones.
3-10 Set all the knobs on the panel to 0 and finish the inspection.
IC BLOCK DIAGRAM
BA4558 (XO078A00)
Dual Operational Amplifier
1
2
3
4 -V
8
7
6
5
Output A +V
Non-Inverting
Input A
-DC Voltage Supply
+DC Voltage
Supply
Output B
Inverting
Input B
Non-Inverting
Input B
Inverting
Input A +
-
+ -
MAIN: IC2,IC3
9. F-20
1
PARTS LIST
GUITAR AMPLIFIER
CONTENTS
OVERALL ASSEMBLY ..................................................................................2
PRE-MAIN UNIT ............................................................................................4
ELECTRICAL PARTS ....................................................................................6
WARNING
Components having special characteristics are marked and must be replaced with parts having
specifications equal to those originally installed.
The numbers in “QTY” shows quantities for each unit.
The parts with “--” in “Part No.” are not available as spare parts.
The second letter of the shaded ( ) part number is I, not one.
The second letter of the shaded ( ) part number is O, not zero.
16. A B C D E F G H
1
2
3
4
5
F-20
F-20
F-20
P.1
OVERALL CIRCUIT DIAGRAM
Note: See parts list for details of circuit board component parts.
TRANS
FORMER
MAIN 1/2
MAIN 2/2
VOLUME
GAIN
MASTER
CH SELECT A/B
POWER ON/OFF
INPUT
MIDDLE
BASS
TREBLE
AUX IN
PHONES
4Ω SPEAKER
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
OP AMP
HIFI AMP
KEC-54230
KEC-54230
1
1
J, U, C S, BS
250V 500mA 250V T160mA L
D2SBA20 (VP344100)
DIODE STACK 1.5A 200V
DB1
WARNING
Components having special characteristics are maked and
must be replaced with parts having specification equal to those originally installed.