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STEREO AMPLIFIER
A-307R
A-207R
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Model
Type
A-307R
MYXJ/EW
MYXJ/GR
MVXJ
-
SAMXJ
SDXJ
CONTENTS
1. SAFETY INFORMATION ...................................... 2
3. SCHEMATIC DIAGRAM ....................................... 6
4. PCB CONNECTION DIAGRAM .......................... 14
5. PCB PARTS LIST ............................................... 22
6. ADJUSTMENT .................................................... 25
PIONEER ELECTRONIC CORPORATION
PIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER ELECTRONIC (EUROPE) N.V. Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 501 Orchard Road, #10-00 Lane Crawford Place, Singapore 0923
c
PIONEER ELECTRONIC CORPORATION 1998
A P A
B
PH
The illustration shows the A-307R.
Power Requirement
A-207R
AC220-230V
AC220-230V
AC220-230V
-
AC110V/120-127V/220V/240V
-
AC110V/120-127V/220V/240V
4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan
V
UM
D ec Ene gy MOS
A P
AP
U
PH
M
BA
B
BA A
PU
U
-
+
-
+
M
MAX
The voltage can be converted by the
following method.
----
----
----
With the voltage selector
With the voltage selector
7. GENERAL INFORMATION ................................ 26
7.1 IC ................................................................. 26
7.2 DISASSEMBLY ........................................... 27
7.3 BLOCK DIAGRAM ....................................... 28
P
M
ORDER NO.
AP
M
RRV1912
T - IZK APR. 1998 Printed in Japan

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Table of Contents
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Summary of Contents for Pioneer A-307R

  • Page 1: Table Of Contents

    PIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A. PIONEER ELECTRONIC (EUROPE) N.V. Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 501 Orchard Road, #10-00 Lane Crawford Place, Singapore 0923 PIONEER ELECTRONIC CORPORATION 1998...
  • Page 2: Safety Information

    The use of a substitute replacement component which does Leakage 0.5mA current Device not have the same safety characteristics as the PIONEER tester under recommended replacement one, shown in the parts list in test this Service Manual, may create shock, fire, or other hazards.
  • Page 3: Exploded Views And Parts List

    Fuse (T5A) See Contrast table(2) Operating Instructions See Contrast table(2) (Spanish/Chinese) 16 (SAMXJ type Only) (2) CONTRAST TABLE A-307R/MYXJ/EW, MYXJ/GR, SAMXJ, SDXJ, A-207R/MYXJ/EW, MYXJ/GR and MVXJ are constructed the same except for the following : s i l a i l...
  • Page 4 A-307R, A-207R 2.2 EXTERIOR A-307R Only A-307R/ SAMXJ and SDXJ Types Only A-307R/SAMXJ and SDXJ Types Only 30 or 45 A-307R /SAMXJ Type Only 29 or 44 A-307R Only A-307R Only...
  • Page 5 See Contrast table(2) PCB Holder AEC7057 Cord Clamp F AEC7134 PCB Mold AMR2533 Damping Plate See Contrast table(2) Shield Plate ANK7043 (2) CONTRAST TABLE A-307R/MYXJ/EW, MYXJ/GR, SAMXJ, SDXJ, A-207R/MYXJ/EW, MYXJ/GR and MVXJ are constructed the same except for the following :...
  • Page 6: Schematic Diagram

    A-307R, A-207R 3. SCHEMATIC DIAGRAM 3.1 OVERALL CONNECTION DIAGRAM FRONT R ASSY HEADPHONE ASSY AWX7124 AWX7114 AF ASSY AWX7119(A-307R) AWX7117(A-207R) VOLUME ASSY AWX7118...
  • Page 7 (SDXJ, SAMXJ) ADG1158 : SDXJ type MYXJ/EW, MYXJ/GR types MYXJ/EW, MYXJ/GR, MVXJ types SDXJ type POWER TRANSFORMER SAMXJ type ATS7188 : A-307R/MYXJ/EW, MYXJ/GR ( ADG7018 : SAMXJ type ATS7190 : A-207R/MYXJ/EW, MYXJ/GR and NVXJ A-307R (13) (15) A-307R/SDXJ, SAMXJ (17)
  • Page 8 A-307R, A-207R 3.2 VOLUME AND HEADPHONE ASSEMBLIES HEADPHONE ASSY AWX7114 J551A : AUDIO SIGNAL ROUTE VOLUME ASSY AWX7118 CN203...
  • Page 9 A-307R, A-207R 3.3 AC PRIMARY ASSY • NOTE FOR FUSE REPLACEMENT FOR CONTINUED PROTECTION AGAINST RISK OF FIRE. CAUTION - REPLACE WITH SAME TYPE AND RATINGS ONLY. MYXJ/EW, MYXJ/GR, MVXJ types AC PRIMARY ASSY AWX7113 (MYXJ/EW, MYXJ/GR, MVXJ) AWX7115 (SDXJ, SAMXJ)
  • Page 10 A-307R, A-207R 3.4 AF ASSY : AUDIO SIGNAL ROUTE AF ASSY AWX7119 (A-307R) AWX7117 (A-207R) C313,C337 : IDLE ADJ. (L CH) C314,C338 : DLE ADJ. (R CH) CN501...
  • Page 11 A-307R, A-207R CAUTION : FOR CONT NUED PROTECTION AGA NST RISK OF FIRE. REPLACE ONLY WITH SAME TYPE NO. 491001 MFD, BY LITTELFUSE INK. FOR IC454 (AEK7009). A-307R A-207R ACH7048 ACH7080 C451 (10000/42) (6800/42) ACH7049 ACH7081 C452 (10000/42) (6800/42) Q333–Q336:...
  • Page 12 A-307R, A-207R 3.5 FRON L, FRONT R AND OPT ASSEMBLIES FRONT L ASSY OPT ASSY AWX7123 AWX7125 FRONT L ASSY S702 : LOUDNESS S703 : SPEAKER A S704 : SPEAKER B...
  • Page 13 A-307R, A-207R FRONT R ASSY AWX7124 INPUT SELECTOR FRONT R ASSY S601 : INPUT SELECTOR TUNER PHONE LINE TAPE1/MD S602 : DIRECT S603 : TAPE2 MONITOR...
  • Page 14: Pcb Connection Diagram

    A-307R, A-207R 4. PCB CONNECTION DIAGRAM 4.1 VOLUME ASSY NOTE FOR PCB DIAGRAMS : 1. Part numbers in PCB diagrams match those in the schematic 3. The parts mounted on this PCB include all necessary parts for diagrams. several destinations.
  • Page 15 A-307R, A-207R 4.2 HEADPHONE AND AC PRIMARY ASSEMBLIES HEADPHONE ASSY HEADPHONE ASSY (ANP7232-A) (ANP7232-A) J551A SIDE A SIDE B AC PRIMARY ASSY POWER TRANSFORMER VOLTAGE SELECTOR (SDXJ and SAMXJ Types) SIDE A AC POWER CORD (ANP7232-A) AC PRIMARY ASSY SIDE B...
  • Page 16 A-307R, A-207R 4.3 AF ASSY AF ASSY POWER TRANSFORMER...
  • Page 17 A-307R, A-207R SIDE A Q153 Q341 IC101 IC451-IC453 CN601 Q333-Q336 Q324,Q326 VR302 Q452 IC301 CN501 Q451 VR301 Q323,Q325 IC454 J551 (ANP7232-A)
  • Page 18 A-307R, A-207R AF ASSY...
  • Page 19 A-307R, A-207R SIDE B Q151 IC151 Q152 Q338,Q337 Q340,Q339 Q102 Q101 Q104 Q103 Q332 Q328,Q327 Q318,Q330 Q322,Q320 Q316,Q314 Q312,Q310 Q304,Q303 Q311,Q309 Q315,Q313 Q321,Q319 Q317,Q329 Q331,Q343 (ANP7232-A)
  • Page 20 A-307R, A-207R 4.4 FRONT L ASSY FRONT L ASSY J603A CN502 J602 VR751 VR752 Q707 Q708 (ANP7231-A) SIDE A FRONT L ASSY Q704,Q705 Q702,Q703 Q701,IC751 (ANP7231-A) SIDE B...
  • Page 21 A-307R, A-207R 4.5 FRONT R AND OPT ASSEMBLIES FRONT R ASSY IC601 VR601 (ANP7231-A) CN202 J602A SIDE A FRONT R ASSY Q601-Q606 Q614-Q616 Q608-Q613 (ANP7231-A) SIDE B OPT ASSY OPT ASSY J603 (ANP7231-A) (ANP7231-A) SIDE A SIDE B...
  • Page 22: Pcb Parts List

    A-307R, A-207R 5. PCB PARTS LIST • NOTES: Parts marked by "NSP" are generally unavailable because they are not in our Master Spare Parts List. • mark found on some component parts indicates the importance of the safety factor of the part.
  • Page 23 A-307R, A-207R Mark No. Description Part No. Mark No. Description Part No. CAPACITORS AF ASSY C451 (10000µF/42V) ACH7048 C452 (10000µF/42V) ACH7049 (1) CONTRAST TABLE C329,C331 CCCSL101K2H AWX7119 and AWX7117 are constructed the same except C313-C316,C337-C340 CCSQCH121J50 for the following :...
  • Page 24 A-307R, A-207R Mark No. Description Part No. Mark No. Description Part No. D608-D612,D614-D621 1SS355 OTHERS D607 SLP6118C51H 3P CABLE HOLDER 51063-0305 D601-D606 SLP9118C51H SCREW ABA1007 SCREW ABA1052 SWITCHES CN101,CN102 8P PIN JACK AKB7023 8P SPEAKER TERMINAL AKE1011 S602,S603 ASG1034 S601...
  • Page 25: Adjustment

    A-307R, A-207R 6. ADJUSTMENT 6.1 IDLE CURRENT ADJUSTMENT ¶ CAUTION : Heatsinks’ (Q323–Q326) DC level is equal to +B or -B. Don’t touch them or you will be electric shocked. 1. Connect the measuring instrument as shown in Fig.6-1. (R373 or R374) 2.
  • Page 26: General Information

    A-307R, A-207R 7. GENERAL INFORMATION 7.1 IC 7 PD5443A (FRONT R ASSY : IC601) • The information shown in the list is basic information and ¶ REMOTE CONTROL AMP MICROCOMPUTER may not correspond exactly to that shown in the schematic ¶...
  • Page 27: Disassembly

    A-307R, A-207R 7.2 DISASSEMBLY ×2 ×2 Front Panel Diagnose the AF Assy. ∗ : Be careful not to injure ×2 the Front Panel. ×5 Rear Panel Chassis Unhook lead wires. Rear Panel Service Chassis ×3 Screw for Rear Panel ×2 PCB Support ×3...
  • Page 28: Block Diagram

    A-307R, A-207R 7.3 BLOCK DIAGRAM...
  • Page 29: Panel Facilities And Specifications

    A-307R, A-207R 8. PANEL FACILITIES AND SPECIFICATIONS 8.1 PANEL FACILITIES REAR PANEL SPEAKERS AC INLE GND (Turntable ground) terminal SPEAKERS B terminals (Left channel) PHONO terminals SPEAKERS A terminals (Right channel) TUNER terminals SPEAKERS A terminals (Left channel) CD terminals...
  • Page 30: Front Panel

    DIREC APE 2 MONI OR – – The illustration shows the A-307R. TAPE 2 MONITOR button/indicator POWER (— OFF/_ ON) switch Use when there is an adaptor component (graphic equalizer, Press to turn power to the unit ON and OFF.
  • Page 31 A-307R, A-207R DIRECT button/indicator BASS tone control Use this button when you do not wish to pass the output from Use to adjust the low-frequency tone. The center position is the input terminal equipment through the various frequency flat (normal) position. When turned to the right, low-frequency adjusting circuits (BASS, TREBLE, BALANCE, LOUDNESS).
  • Page 32: Remote Control

    : For playback with a component connected to the When the accessory remote control unit is used to operate other Pioneer components with the Î mark, it cannot be used LINE terminal. to operate functions which do not correspond to the functions...
  • Page 33: Specifications

    (both channels driven at 20 Hz to 20 kHz)∗∗ Power consumption [A-307R] [A-307R] ..............140 W T.H.D. 0.1 %, 8 Ω ........45 W + 45 W∗ [A-207R] ..............130 W T.H.D. 0.15 %, 4 Ω ........65 W + 65 W∗...

This manual is also suitable for:

A-207r

Table of Contents