Univox_U320APB 电路图 维修原理图.pdf

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1、RED V7V6V5V4V3 BLU BLU GRN 400V -22V (BIAS) 10K 7W 6.6K 5W GRN YLW 3 3 22 77 4 5 4 5 V7 V6 99 4-54-55 220K220K 400V 220K 2K2 47K 47K GRN This as-built schematic was developed from what the documenter believes is a U-320 Amplifier, SN-37997, made in Japan. The amplifier used to develop this schematic

2、 appeared to the documenter to be original factory construction and components. This schematic was developed for reference purposes only. The developer makes no claims to the authenticity of the amplifier used to develop this schematic, to the accuracy of this document, its representation of the ori

3、ginal design, the stated Manufacturer, Make, Model Number or Country of Manufacture. 220824sa 400V BRIGHT CH 1 135V 115V 60Hz RED GRY V1 99 4-54-5 V2 7W 20 450V 100V 115V 0V 400V 330K 6 50K V5B 1K5 7 6 8 150V265V V1B 220K 47K 47K 7 6 140V 0V 2K2 8 VOLUME 1MA VOLUME 1MA TONE 500KB TONE 500KB 500p500p

4、 220K 220K 220K 220K 20 350V 20 350V 0V VOLUME 1MA VOLUME 1MA TONE 500KB TONE 500KB 500p500p 220K 220K 220K 220K 400V400V400V 400V400V400V 220K 220K 150K150K 47K47K 470K470K 33 6V 33 6V V4B 1MC -5V0-3V3 -0V6 200V 470K 10K 3K3 10 50V 400V400V400V 400V400V400V400V400V400V 400V400V400V 220K B4B4 1M5 1M

5、5 1M5 1M5 1V6 NORMAL BRIGHT CH 2 NORMAL 220K 3K3 33 6V 2 1 3 1K 0V 1K 0V 4K7 500KB500KB 4FBXA1C 4FBXA1C 160V 1V4 220K 500KB500KB B5B5 400V 680K 220K 200p200p 10K 5W10K 5W B4B4 210V 1 150V 50V 470K470K 45V 400V B5B5 330K 47 150V 39V 680K 220K 1V2 70K 470K 1V0 (B+) 45mA (125mA) REVERB INTENSITY V2B V2

6、A 6 6 Warnings: Danger! High Voltage! Do not use fuses of higher ratings than specified. Service: If this amplifier is in need of servicing, it should be taken to a reliable radio person. BA9SBA9SBA9S E E E E ON STANDBY ON STANDBY 2A SB2A SB BLK BLK GRY GRY BLK 0V 4 6 7 8 9 SEND REDRETURN BLK GRY RE

7、D 390V RED 465V 465V EXT. SPKR RED 90V 30V 6V3 4A 8V0 1 1 1 1 1 390V STANDBY ON 20 450V 20 450V SPEED 1MC1MC1MC1MC 1 1 1MC 1 SPEED 1MC 1 5W V3B 7 6 8 2 1 3 V3A 100K 470K 400V 1K 500p 47 150V 47 150V 100K 330K 95V 94V 100K V5A 2 1 3 22K 20 350V20 350V 22K 20 350V RED SH-1 400V 150mA SH-1 400V 150mA 4

8、K74K7 10 50V 10 50V 10 50V 10 50V -34V SD-1Y 20mA4K7 10 50V 10 50V -34V SD-1Y 20mA 10K10K 1V2 V1A 2 1 3 125mA 1V2 10mA V4A 2 1 3 7 6 8 V4A 2 1 3 7 6 8 05 10V UNIVOX U-320-APB MANUFACTURED BY: UNICORD CORP. 2M22M22M22M2 2M22M22M22M2 Notes: 1. Resistors 1/2W unless otherwise stated. 2. Valves V1, V3,

9、V5 - 12AX7 3. V2 - 6AN8 4. V4 - 12AU7 5. Valves V6, V7 6. Located on foil side of board. 7. DC Voltages and Amperes in BLUE are approximates, not design. 8. Issues marked in RED BLK 0V 0V BLKBLKBLK RED V7V6V5V4V3 BLU BLU GRN 400V -22V (BIAS) 10K 7W 6.6K 5W GRN YLW 3 3 22 77 4 5 4 5 V7 V6 99 4-54-55

10、220K220K 400V 220K 2K2 47K 47K GRN This as-built schematic was developed from what the documenter believes is a U-320 Amplifier, SN-37997, made in Japan. The amplifier used to develop this schematic appeared to the documenter to be original factory construction and components. This schematic was dev

11、eloped for reference purposes only. The developer makes no claims to the authenticity of the amplifier used to develop this schematic, to the accuracy of this document, its representation of the original design, the stated Manufacturer, Make, Model Number or Country of Manufacture. 220824sa 400V BRI

12、GHT CH 1 135V 115V 60Hz RED GRY V1 99 4-54-5 V2 7W 20 450V 100V 115V 0V 400V 330K 6 50K V5B 1K5 7 6 8 150V265V V1B 220K 47K 47K 7 6 140V 0V 2K2 8 VOLUME 1MA TONE 500KB 500p 220K 220K 20 350V 0V VOLUME 1MA TONE 500KB 500p 220K 220K 400V 400V 220K 150K 47K 470K 33 6V V4B 1MC -5V0-3V3 -0V6 200V 470K 10

13、K 3K3 10 50V 400V 400V400V 400V 220K B4 1M5 1M5 1V6 NORMAL BRIGHT CH 2 NORMAL 220K 3K3 33 6V 2 1 3 1K 0V 4K7 500KB 4FBXA1C 160V 1V4 220K 500KB B5 400V 680K 220K 200p 10K 5W B4 210V 1 150V 50V 470K 45V 400V B5 330K 47 150V 39V 680K 220K 1V2 70K 470K 1V0 (B+) 45mA (125mA) REVERB INTENSITY V2B V2A 6 6

14、Warnings: Danger! High Voltage! Do not use fuses of higher ratings than specified. Service: If this amplifier is in need of servicing, it should be taken to a reliable radio person. BA9S E E ON STANDBY 2A SB BLK BLK GRY GRY BLK 0V 4 6 7 8 9 SEND REDRETURN BLK GRY RED 390V RED 465V 465V EXT. SPKR RED

15、 90V 30V 6V3 4A 8V0 1 1 1 1 1 390V STANDBY ON 20 450V SPEED 1MC 1 5W V3B 7 6 8 2 1 3 V3A 100K 470K 400V 1K 500p 47 150V 47 150V 100K 330K 95V 94V 100K V5A 2 1 3 22K 20 350V RED SH-1 400V 150mA SH-1 400V 150mA 4K7 10 50V 10 50V -34V SD-1Y 20mA 10K 1V2 V1A 2 1 3 125mA 1V2 10mA V4A 2 1 3 7 6 8 05 10V U

16、NIVOX U-320-APB MANUFACTURED BY: UNICORD CORP. 2M2 2M2 Notes: 1. Resistors 1/2W unless otherwise stated. 2. Valves V1, V3, V5 - 12AX7 3. V2 - 6AN8 4. V4 - 12AU7 5. Valves V6, V7 6. Located on foil side of board. 7. DC Voltages and Amperes in BLUE are approximates, not design. 8. Issues marked in RED BLK 0V 0V BLK 470V (405V) B2B2 470V (405V) B2 460V (390V) B3B3 460V (390V) B3 310V (275V) B4B4 310V (275V) B4 260V (230V) B5B5 260V (230V) B5 1 1 Chassis GroundBoard GroundChassis GroundBoard Ground 收音机爱好者资料库 Ra d i o Fa n s .CN