Topic: led level pod calibration

[spartacus]

hi, since repairing my pod (cleaned connector pins, removed ula and cleaned pins)  and fitting a new battery the battery power level leds goes down one block every 15 seconds so it beeps and stops after about a minute. power on/off and i'm off again. Even if you don't move the power leds drop down quickly to zero beep level. Is there a way of setting this up?any help thanks

[C5 ENTHUSIAST + RESTORER]

Hi there do you still have the original key switch ...

[spartacus]

Hi, No I am using a 32A household RCD. Is that related?
It  was working till I repaired the pod, and replaced the battery
thanks

[C5 ENTHUSIAST + RESTORER]

Hi just a thought is the small brown wire connected .I  do know that if it is not connected the voltage does drop down sometimes but the main problem is the ULA chip in the pod ...and it is not repairable ...bye Chas

[radiomarty]

I agree with Chas - if it is not the thin brown wire it is most likely a duff ULA chip 

[spartacus]

Hi, The browns are connected together on the +ve.
I was looking at the 'unoffical service manual' and the extract below looks relevant.
Has anyone done this procedure?
thanks

Instructions for setting up the offset pot VR1 in the instrument pod
Firstly the internal multiplexer must be disabled and forced into fuel gauge mode. This occurs if pin 9 is grounded at power up. The steps are:
1. connect ULA pin 9 to pin 22 (GND)
2. apply the required battery lock out voltage to +BATT (top of R17). The suggested value is 10.5 volts
3. apply +5V to Vcc pin 8
4. set I4 to zero by grounding pin 3 for example
5. using a high impedance digital volt meter (z greater than one megohm) measure the voltage between pin 23 (+) and pin 27 (-)
6. set VR1 for +200 millivolts. If out of range then R3 should be increased by, say 1000 ohms
7. turn-off power, remove the short on pin 9 and check fuel gauge operation under normal conditions. Note that with the nominal component values as shown, drop out time per segment is about 20 seconds with two hidden segments beyond the most significant bit.

[Luke S]

Mine used to do that. I have repaired it now so I will try to get back to you about it as soon as possable about it