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Pioneer GR-408, Service Manual

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Pioneer GR-408 Service Manual Download Page 6

GR-408

6

A

B

C

D

1

2

3

4

1

2

3

4

3. SCHEMATIC DIAGRAM

A

3.1 MAIN BOARD ASSY

AC CORD UL

02360040-006

IC1B
LA6458S

INPUT

INPUT

B

IN

BUF

AM

VR KNOB LED

GRAPHIC

EQUALIZER

ON/OFF

POWER SUPPLY

POWER OFF/ON

(LINE OUTPUT MUTE)

OFF

ON

EQUALIZER

OFF / ON

-29

OUTPUT

V

C

-12

+12

0

0

0

0

+29

A

MAIN BOARD ASSY (GR408-A)

2/4

POWER PCB

A

4/4

JACK PCB

A

01804083-520

AC-2

AC-1

250V/630mA

SW2 : EQUALIZER OFF/ON
SW3 : POWER OFF/ON

C51

0.22

µ

/500V

R21

820/1W

R22

820/1W

R6

6.8k

Summary of Contents for GR-408

Page 1: ...Alexandra Road 04 01 Singapore 159936 PIONEER ELECTRONIC CORPORATION 1998 c GR 408 RRV2059 1 SAFETY INFORMATION 2 2 EXPLODED VIEWS AND PARTS LIST 3 3 SCHEMATIC DIAGRAM 6 4 PCB CONNECTION DIAGRAM 8 5 PCB PARTS LIST 10 6 ADJUSTMENT 10 7 GENERAL INFORMATION 11 7 1 IC 11 8 PANEL FACILITIES AND SPECIFICATIONS 13 CONTENTS T IZK DEC 1998 Printed in Japan THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL S...

Page 2: ...evident from visual inspection nor the protection afforded by them necessarily can be obtained by using replacement components rated for voltage wattage etc Replacement parts which have these special safety characteristics are identified in this Service Manual Electrical components having such features are identified by marking with a on the schematics and on the parts list in this Service Manual ...

Page 3: ...s indicates the importance of the safety factor of the part Therefore when replacing be sure to use parts of identical designation Screws adjacent to mark on the product are used for disassembly 4 7 5 3 2 1 1 6 8 1 Pin Plug Cords L 1m PDE1248 2 Polyform L 14904081 000 3 Polyform R 14904082 000 4 Polybag 20 26 15020026 510 5 Operating Instructions 15204080 0297 English French 6 Carton Box 15304080 ...

Page 4: ...4 GR 408 9 18 18 18 18 18 18 10 12 11 1 5 4 6 6 6 6 7 2 2 19 18 18 18 18 18 18 18 18 18 18 18 18 18 13 18 3 3 19 18 18 20 20 18 19 19 3 3 17 6 8 14 6 6 6 13 13 13 18 18 15 16 2 2 EXTERIOR SECTION ...

Page 5: ...st 13004082 000 7 Rear Panel 18004085 101 NSP 8 Bottom Cabinet 9 Bonnet Cover 18004083 010 10 Main Bord Assy 1 4 GR408 A EQ PCB 11 Main Bord Assy 2 4 GR408 A POWER PCB 12 Main Bord Assy 3 4 GR408 A EQ ON OFF PCB 13 Foot Black W O H S 13821007 010 14 Main Bord Assy 4 4 GR408 A JACK PCB 15 AC Cord UL 02360040 006 NSP 16 Bushing 17 Name Plate PAM1776 18 Screw BBZ30P080FZK 19 Screw IBZ30P080FMC 20 Scr...

Page 6: ...UT B IN BUF AM VR KNOB LED GRAPHIC EQUALIZER ON OFF POWER SUPPLY POWER OFF ON LINE OUTPUT MUTE OFF ON EQUALIZER OFF ON 29 OUTPUT VC 12 12 0 0 0 0 29 A MAIN BOARD ASSY GR408 A 2 4 POWER PCB A 4 4 JACK PCB A 01804083 520 AC 2 AC 1 250V 630mA SW2 EQUALIZER OFF ON SW3 POWER OFF ON C51 0 22µ 500V R21 820 1W R22 820 1W R6 6 8k ...

Page 7: ...PHIC EQUALIZER INPUT GRAPHIC EQUALIZER INPUT EQUALIZER OFF ON EQUALIZER OFF ON OUTPUT GRAPHIC EQUALIZER OUTPUT V EE V CC GND V EE V CC VEE VCC VCC GND GRAPHIC EQUALIZER OUTPUT GRAPHIC EQUALIZER OUTPUT GRAPHIC EQUALIZER OUTPUT GRAPHIC EQUALIZER OUTPUT GRAPHIC EQUALIZER OUTPUT VR1 VR14 01110203 230 GRAPHIC EQUALIZER OUTPUT 0 0 0 12 0 0 0 12 12 12 12 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12 12 0 0 0 0 ...

Page 8: ...OTE FOR PCB DIAGRAMS 1 Part numbers in PCB diagrams match those in the schematic diagrams 2 The parts mounted on this PCB include all necessary parts for several destinations For further information for respective destinations be sure to check with the schematic diagram 3 View point of PCB diagrams Capacitor Connector P C Board Chip Part SIDE A SIDE B ...

Page 9: ...GR 408 9 A B C D 5 6 7 8 5 6 7 8 A B 3 4 EQ ON OFF PCB A IC3 IC2 IC1 POWER CORD AC SIDE A MAIN BOARD ASSY A ...

Page 10: ...ot in our Master Spare Parts List The mark found on some component parts indicates the importance of the safety factor of the part Therefore when replacing be sure to use parts of identical designation When ordering resistors first convert resistance values into code form as shown in the following examples Ex 1 When there are 2 effective digits any digit apart from 0 such as 560 ohm and 47k ohm to...

Page 11: ...F N d n a s l a n i m r e t N I h t i w r o t i c a p a c e b n a c n i a g e h t d n a r e h t o h c a e o t t x e n d e t a c o l e d i l s r o t s i s e r e l b a i r a v a g n i t c e n n o c y b p u t e s e m u l o v 1 1 6 N I a g n i t c e n n o c y b r e t l i f s s a p d n a b e h t e s o p m o C s l a n i m r e t F N d n a s l a n i m r e t N I h t i w r o t i c a p a c e b n a c n i a g ...

Page 12: ...8 LA6458S MAIN BOARD ASSY IC1 Input Buffer Amplifier Pin Arrangement 1 Vcc VOUT1 VOUT1 VOUT2 VOUT2 VIN 1 VIN 1 VIN 1 VIN 1 VIN 2 VIN 2 VIN 2 VIN 2 VEE VEE Vcc Vcc 2 3 4 5 6 7 8 9 1 9 4 3 5 2 8 7 6 Block Diagram ...

Page 13: ...ompen sation while performing mixing operations with program sources FM broadcasts CD play tape playback etc OFF When not using the equalizer but playing back or recording program sources without compensation 3 Equalizer controls These are equalizer controls for the bands 60 Hz 150 Hz 400 Hz 1 kHz 2 4 kHz 6 kHz and 15 kHz When the equalizer button has been set to ON these controls may be adjusted ...

Page 14: ...lizer bands Center frequencies 60 Hz 150 Hz 400 Hz 1 kHz 2 4 kHz 6 kHz 15 kHz Variable range 10 dB SN ratio IHF A network short circuit 1V INPUT 106 dB Electrical section miscellaneous Power requirements AC 120 V 60 Hz Power consumption 6 W External dimensions W x H x D 420 x 85 x 214 mm 16 9 16 x 3 3 8 x 8 7 16 in Weight 2 2 kg 4 lb 14 oz Accessories Pin plug cords 2 Operating Instructions 1 NOTE...

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