Pioneer GM-X404 X1H/UC Service Manual

©) PIONEER
The Art of Entertainment
Service
Manual
BRIDGEABLE FOUR-CHANNEL POWER AMPLIFIER GM-X4d04
@ GM-X404/X1H/UC
ORDER NO.
CRT 1642
xMIR/UC
GM-X4044 XIH/EW,ES
GM=-X304 xc
CONTENTS
1. SAFETY INFORMATION(UC MODEL)......-ssescsessee 2
2 DISASSEMBLY decide onertteccnttsneaniaatoene 2
3. ELECTRICAL PARTS LIST cassssssssesseenceessetnseeeneeeee 3
4, CONNECTION DIAGRAM
(GM-X404/X1H/UC,EW,ES) ......... 5
5. SCHEMATIC CIRCUIT DIAGRAM
(GM-X404/X1H/UC,EW,ES) ......... 7
6. CONNECTION DIAGRAM(GM-X304/X1H/UC) ......... 9
SPECIFICATIONS
Power source...............4. 14.4 V DC (10.8 — 15.6 V allowable)
Grounding SysteM...............ccceeseteeeeeeeereenees Negative type
Current consumption ............. 18 A (at continuous power, 4Q)
Average current drawn" .............. 5.5 A (4Q for four channels)
10 A (4Q for two channel)
PUSC cciscedescetes Heeveddaboawes devas sees cacees nynesewsis daven oahdes els 25A
Dimensions...............6eseeeeeeee 206 (W) x 50 (H) x 270 (D) mm
[8-1/8 (W) x 2 (H) x 10-5/8 (D) in.]
Weight ............ 2.9 kg (3.3 Ibs.) (Leads for wiring not included)
Maximum power output............... 60 W x 4/140 W x 2 (EIAJ)
Continuous power output
30 W x 4 (at 14.4V, 42, 20 — 20,000 Hz, 0.08% THD)
70 W x 2 (at 14.4V, 49, 20 — 20,000 Hz, 0.8% THD)
35 W x 4 (at 14.4V, 2Q, 20 — 20,000 Hz, 0.8% THD)
20 W x 4 (at 12V, 42, 20 — 20,000 Hz, 0.08% THD)
50 W x 2 (at 12V, 4Q, 20 — 20,000 Hz, 0.8% THD)
25 W x 4 (at 12V, 2Q, 20 — 20,000 Hz, 0.8% THD)
Load impedance ....................ceeee eee 4Q (2 — 8Q allowable)
Frequency response ................ 10 — 50,000 Hz (+0 dB, -1 dB)
Signal-to-noise ratio ............ eee eens 108 dB (IHF - A network)
SO parationyii seer sess sas heeweca seca bees sedcae tec eceenehs 65 dB (1 kHz)
PIONEER ELECTRONIC CORPORATION
7. SCHEMATIC CIRCUIT DIAGRAM
(GM-X304/X1H/UC) ....... 11
BH EXPLODED: VIEW? ceenccccecescescctuecstesecensaseseicesnstectieden 13
9. PACKING METHOD ........ cc esessssssesscesseeesseeeseseneesseenes 17
10. OPERATIONS AND CONNECTION
(GM-X404/X1H/UC) ....... 18
11. OPERATIONS AND CONNECTION
(GM-X304/X1H/UC) ....... 21
Low pass filter ......... 2.2... c cece cece Cut off frequency: 80Hz
Cut off slope: -18 dB/oct
High pass filter ..............ccccceceeeeeuee Cut off frequency: 80 Hz
Cut off slope: -12 dB/oct
Bass boost(GM-X404/X1H/UC,EW,ES) ..Frequency: 40 — 120 Hz
(GM-X304/X1H/UC) ............ cece eee Frequency: 60 Hz
Gain: 0 — 12 dB
Input level / impedance ................ 2.2. ceceeee ee 0.4 — 2 V/22 kQ
These specifications were determined and are presented in
accordance with specification standards established by the Ad
Hoc Committee of Car Stereo Manufacturers.
Note:
Specifications and the design are subject to possible modifica-
tion without notice due to improvements.
*Average current drawn
The average current drawn is nearly the maximum current
drawn by this unit when an audio signal is input. Use this value
when working out total current drawn by multiple power
amplifiers.
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan
PIONEER ELECTRONICS SERVICE INC. P.0.Box 1760, Long Beach, California 90801 U.S.A.
PIONEER ELECTRONICS OF CANADA, INC. 300 Allstate Parkway Markham, Ontario L3R OP2 Canada
PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS AUSTRALIA PTY.LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia TEL:[03]580-9911
© PIONEER ELECTRONIC CORPORATION 1995
K-FFP. JAN. 1995 Printed in Japan