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ELECTRIC ACOUSTIC GUITAR
SENSOR PICKUP
SYSTEM55T
SERVICE MANUAL
SYSTEM55T
FGX720SCA
I CONTENTS
SPECIFICATIONS ..................................................................... 2
PANEL LAYOUT ....................................................................... 3
OVERALL ASSEMBLY ............................................................. 4
EG 011832 HAMAMATSU, JAPAN
Copyright (c) Yamaha Corporation. All rights reserved. PDF '06.09
SYSTEM55T
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 personal injury, destruc-
tion of expensive components and failure of the product to perform 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, certification, 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, therefore, inevitable and changes in specifica-
tion 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 bus in the unit (heavy gauge black wires connect to this bus).
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.
I SPECIFICATIONS
System SYSTEM-55T (Monaural 1 way)
Pickup Bar Sensor (Piezo type)
Controls VOL., 3 Band (HIGH, MID, LOW) EQ control,
AMF control, Tuner ON switch
Output jack Combination end pin/power switch
Output impedance 1 k
Power supply 9V DC, S-006P (6F22) dry cell battery
Battery life · When not using the tuner: Approx. 150 hours
· When using the tuner: Approx. 140 hours
(When using the tuner for one minute per
hour of pre amplifier use.)
Accessories · Hexagonal wrench for neck adjustment x 1
· S-006P (6F22) dry cell battery x 1
2
SYSTEM55T
I PANEL LAYOUT
· Pickups
Control Section
Battery Holder
Bar Sensor
Output Jack (with power switch function)
· Control Panel
5
1
2
3
4
6
1 VOL. (Volume) Control
2 Tuner ON Switch
3 BATT. (Battery Check) Indicator
4 Tuner Indicator
5 3 Band Equalizer
6 AMF Control
3
SYSTEM55T
I OVERALL ASSEMBLY
10a Accessories of Endpin Jack
1
10
7
2
3 Pre-amplifier assembly
3e
5 6
9
8
3d
3c
3b
3a
4
4
SYSTEM55T
REF NO. PART NO. DESCRIPTION REMARKS QTY RANK
OVERALL ASSEMBLY SYSTEM55T
1 QC878200 Pickup Assembly PP-607Y 09
2 LB009020 Connector Housing XHP-2P 01
* 3 WG320100 Pre-amplifier Assembly AMP-Z1T(CPX)
* 3a WJ302000 Knob Volume BPK6D-APX VOL.
* 3b WJ301900 Knob Slide BPK1D-CPX LOW/MID/HIGH/AMF 4
* 3c WJ307200 Button BPB10D-CPX Tuner
* 3d WJ302200 Plate Front BSF1D-CPX
* 3e WG874800 Spacer KRRU-CPX
* 4 WH260400 Pan Head Screw 3x10 MFZN2B3 2
* 5 WH538500 Floating Nut 0.6t 2
* 6 WH258500 Truss Head Screw 2.5x6 MFZN2B3 4
7 VC668400 Cord Clamp 2 02
8 QC111900 Battery Holder 05
9 QC112000 Cushion 03
10 QC882100 Endpin Jack with Cord 08
10a -- Screw for Endpin Jack 2x10 With Endpin Jack 3
ACCESSORIES
AA805430 Hexagonal Wrench #5 04
-- Battery 006P 9V Dry cell (PC10008)
: New Parts RANK: Japan only
5
ELECTRIC ACOUSTIC GUITAR
SENSOR PICKUP
SYSTEM55T