Pioneer A-307R A-209R Service Manual - Page 25
Browse online or download pdf Service Manual for Amplifier Pioneer A-307R A-209R. Pioneer A-307R A-209R 33 pages. Stereo amplifier
Also for Pioneer A-307R A-209R: Operating Instructions Manual (12 pages), Operating Instructions Manual (36 pages)
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- 1. Table of Contents
- 2. Safety Information
- 3. Exploded Views and Parts List
- 4. Schematic Diagram
- 5. Pcb Connection Diagram
- 6. Pcb Parts List
- 7. Adjustment
- 8. General Information
- 8. Disassembly
- 8. Block Diagram
- 9. Panel Facilities and Specifications
- 9. Front Panel
- 9. Remote Control
- 9. Specifications
- 9. Amplifier Section
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. Turn the POWER switch to ON.
3. Adjust VR301 (VR302) so that the voltage between both sides of R373 (R374) becomes 10mV ± 1mV.
4. Ages for 5 minutes.
5. Adjust VR301 (VR302) so that the voltage between both sides of R373 (R374) becomes 11mV ± 1mV.
DC Voltmeter
DC Voltmeter
R373
R375
Heat Sink
VR301
Heat Sink
Fig.6-1 Adjustment Method
AF ASSY
SIDE A
Heat Sink
R374
R376
VR302
Heat Sink
CN202
A-307R, A-207R
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