Pioneer GM-4200 User Manual

Service
cTVIamial
(i!) PIONEER
The Art of Entertainment
• GM-H200/UC
ORDER NO.
CRT1381
BRIDGEABLE POWER AMPLIFIER _ _ _
GM-H2QO
GM-4SOO ew
uc
NOTE:
• In this unit, an electric current of about 40A flows at the continuous power output of 4Q and a
current close to 60A flows at 2Q. Even when there is no signal, a current around 4A flows. There¬
fore, make a test at an appropriate signal level in consideration of the power consumption of the
power supply unit.
CONTENTS
1. SPECIFICATIONS. 2
2. CONTROLS AND THEIR USE (UC). 3
3. CONNECTING THE UNITS (UC) . 4
4. CONTROLS AND THEIR USE (EW) . 7
5. CONNECTING THE UNITS (EW) . 9
6. DISASSEMBLY .13
7. CIRCUIT DESCRIPTION.15
8. CONNECTION DIAGRAM (UC) .18
9. SCHEMATIC CIRCUIT DIAGRAM (UC) .21
10. SCHEMATIC CIRCUIT DIAGRAM (EW).24
11. CONNECTION DIAGRAM (EW) .27
12. EXPLODED VIEW .30
13. PACKING METHOD .33
14. ELECTRICAL PARTS LIST .34
PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome. Meguro-ku. Tokyo 153, Japan
PIONEER ELECTRONICS SERVICE INC. P.O. Box 1760, Long Beach. California 90801 U.S.A.
PIONEER ELECTRONICS OF CANADA, INC. 50S Cochrane Drive, Markham, Ontario L3R 8E3 Canada
PIONEER ELECTRONIC [EUROPE] N.V. Keetberglaan 1. 9120 Beveren. Belgium
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside. Victoria 3195, Australia TEL: [03] 580-9911
© PIONEER ELECTRONIC CORPORATION 1991
FA MAY 1991 Printed in Japan

Pioneer GM-4200 Specifications

General

Channels	2
Frequency Response	10 Hz
Signal to Noise Ratio	100dB
Crossover Frequency	50Hz - 500Hz
Bass Boost	0 - 12dB

Summary

1. SPECIFICATIONS

2. CONTROLS AND THEIR USE (UC MODEL)

UC Model Controls and Indicators

Details the power indicator and RCA input level adjustment for the UC model.

Compulsory Fan Cooling System

Explains automatic cooling fan operation and installation requirements for heat dissipation.

3. CONNECTING THE UNITS (UC MODEL)

UC Model Wiring Safety and Battery Lead

Provides safety warnings for wiring and instructions for connecting the special red battery lead.

UC Model Speaker Connection Modes

Describes speaker connection for two-channel, one-channel, and three-channel modes.

4. CONTROLS AND THEIR USE (EW MODEL)

EW Model Input Gain and Level Controls

Details DIN/RCA input gain, level controls, and input selector for the EW model.

EW Model Drive Mode Switch Function

Explains the function of the drive mode switch for speaker impedance selection.

5. CONNECTING THE UNITS (EW MODEL)

EW Model Wiring Guidelines and Battery Connection

Covers wiring guidelines, safety warnings, and battery lead connection for the EW model.

6. DISASSEMBLY

Disassembly: Case and Amp Unit Removal

Instructions for removing the outer case and the main amplifier unit.

Disassembly: Bracket and LED Assy Removal

Steps for removing the bracket and LED assembly during disassembly.

7. CIRCUIT DESCRIPTION

Key Circuit Descriptions

Explains isolator, PWM power supply, Troidal transformer, and DC servo circuits.

12. EXPLODED VIEW

Parts List

13. PACKING METHOD

14. ELECTRICAL PARTS LIST

8. CONNECTION DIAGRAM (GM-H200/UC)

11. CONNECTION DIAGRAM (GM-4200/EW)

10. SCHEMATIC CIRCUIT DIAGRAM (GM-4200/EW)