1

DI503J Triple DI and Re-Amp / Re: R31 problem

« on: February 21, 2023, 01:06:54 PM »

Hi JPK,

I found the problem it's L1 (no measurement mH, I've bought the tool;))


Thxs for all


Mark

2

DI503J Triple DI and Re-Amp / Re: R31 problem

« on: February 18, 2023, 01:53:03 PM »

All measurements of the capacitors and resistors, such as the soldering, are fine, the switch commute., trimmer goes to 0- 50 k.

The only component I cannot measure is L1. (don't have the measuring tool for microhenries)

Thxs

3

DI503J Triple DI and Re-Amp / Re: R31 problem

« on: February 17, 2023, 04:17:15 PM »

Hi JPK,

H=5.6V
HT=46.5V
V+=15.6V
V-=15.5V
TP1=0V
TP2=25.6 V
TP3=0V


Thnx

Mark

4

DI503J Triple DI and Re-Amp / Re: R31 problem

« on: February 17, 2023, 09:01:55 AM »

Hi JKP,

I've changed U3 and U4, now pre amp work fine, but when I push the DIST Botton in tube mode, the sound leaves.



THAKS IN ADVANCE

5

DI503J Triple DI and Re-Amp / Re: R31 problem

« on: February 03, 2023, 07:11:58 PM »

Problem test:

all tests passed, Voltage are fine, but 

DI Preamp Check (when I press the button preamp and increase the knob, no I've sound)
DIST Check (the same way, when I press the tube knob the sound leave)


Thnk in advance

6

DI503J Triple DI and Re-Amp / Re: R31 problem

« on: February 03, 2023, 06:05:52 PM »

 problem solved,

U3 and U4 swapped!!!


You're the GOAT!!!


thnx

PS: R31 5.3 ohm is fine? better to change it?

7

DI503J Triple DI and Re-Amp / R31 problem

« on: February 03, 2023, 03:14:46 PM »

Hi guys,

I switch on the lunchbox, the resistor R31 get burned, please help.

R31=5.3 ohm (normaly 5R6)

Thnx