Philips GA-212 Turntable LDR Voltage

I fixed this on the same model: Service my Philips 212 Turntable - Part 2: initial measurements

Philips have changed that circuit. In the post I linked above, you 'll find the LCR schematics for both versions (section Auto Switch-Off LDR).
In my case, I believe the reason was that someone serviced the turntable with the incorrect version of the manual an tried to replace (and put back wrongly) the potentiometer. While the defect in my table was somewhere else in the power supply.
So after I fixed the supply, and resoldered the LCR regulator, a 4K7 one, and could get the voltage to 0.75 V (see meter LCD screen below)

Hi Jan

Many thanks for your reply. I had, in fact, followed your excellent advice before tackling my own TT. I'll have another go 'though it's not a critical aspect as the TT is working and sounding fab. With the original and excellent Philips 401 Cartridge too! I think this TT is very well made overall but it's just a shame the arm looks and feels like it's come from 'Toys r Us' ;-)

Cheers

Graeme

Ultra light tonearms mounted fixed on the subchassis are specific for Philips.

Hello again

A few thoughts re the LDR voltage please? Whilst the TT is working and sounding great, I cannot get the LDR voltage anywhere near 0.75V. It varies between 6.5 and 8.5 depending on the setting of R465. The supply voltage is exactly 9V

I have thoroughly checked the LDR, R465 and R526

R526 measure 820ohm. R465 measures between 0 and 4.45Kohm (a 4.7K pot) and the LDR (wires disconnected from board) 6.5Mohm (dark) and 9Kohm with the bulb ON. The measurement of 0.75V should be when the light is on, in the stop position and the arm at the rest position.

Using a voltage divider calculator https://ohmslawcalculator.com/voltage-divider-calculator shows that i could never reach 0.75V

As such i believe i have an incorrect/faulty LDR? I know they are avail with many different resistance settings. This one appears original.

I have a fair amount of electronic knowledge gained over many years but this one stumps me. Perhaps i cannot see the wood for the trees. Any thoughts please?

As said before, this is in no way critical but it would be nice to sort it.

 - On another note, what voltage do you have across the main motor when on 33/45? I don't find the motor that strong and the current/voltage cannot be that high as it's being fed via a simple BC338

Cheers

Graeme

On the 1st note:

If that's what the LDR measures, you'll indeed never get at the - 0.75 V.
To be sure, I checked with both versions of the schematic:

But in both cases, the LDR has to drop to under the 1 K. 
500 Ohm if the pot = 10 K, 980 Ohm if it's a 4.7 K one. 
The 9 K that you measure is an order of magnitude too high for either configuration.

On the 1st note:

If that's what the LDR measures, you'll indeed never get at the - 0.75 V.
To be sure, I checked with both versions of the schematic:

But in both cases, the LDR has to drop to under the 1 K. 
500 Ohm if the pot = 10 K, 980 Ohm if it's a 4.7 K one. 
The 9 K that you measure is an order of magnitude too high for either configuration.