Hello Everyone,
Let me introduce a little "overview" and measurements of the Philips CD204 compact disc player.
The CD204 is a second-generation Philips CD-player from 1984. Its circuit design is identical to the older Philips models and uses a Philips CDM-1 transport made of diecast zinc/aluminum. The entire enclosure (and internal chassis) is made of metal, but with a plastic front panel. 7 kg weight. RCA cable is soldered inside like the power cord. Unfortunately, there is no digital output.
The digital-to-analog converter based on two 14-bit TDA1540 chips. It is claimed that oversampling compensates for the loss of bits.
The player arrived non-functional. After some re-soldering, it worked. Just in case, I replaced the infamous blue Philips axial capacitors and the transistors on the tray control board. I'm not sure the player is working properly, but I have no complaints. It struggles with reading a test disc, as it behaves randomly after track 30, but if you play tracks sequentially without switching, everything is perfect.
The no-name CD-R I accidentally bought was showing mess on some tracks, but thanks to NTTY and Vintage02 I was able to take measurements from the "factory" disc.
My setup: Philips CD204 (Test CD) --> MiniDSP PocketADC (coax) --> DIR9001 (i2s) --> SA9227 (usb) --> Win11 --> REW
Measurements (Analog out, stock cable)
999.91Hz sine @0dBFS (without and with dither)
0dbfs / -1dbfs / -3dbfs / -6dbfs (without dither)
0dbfs (L+R) / -1dbfs / -3dbfs (L+R) / -6dbfs (with shape dither)
Multitone
IMD AES Analog
18kHz and 20kHz, -3.02dB
Pitch error and jitter test
Oversampling filter response test
3DC measurement
Unfortunately, I don't know what's going on here.
Thank you for your attention!
Let me introduce a little "overview" and measurements of the Philips CD204 compact disc player.
The CD204 is a second-generation Philips CD-player from 1984. Its circuit design is identical to the older Philips models and uses a Philips CDM-1 transport made of diecast zinc/aluminum. The entire enclosure (and internal chassis) is made of metal, but with a plastic front panel. 7 kg weight. RCA cable is soldered inside like the power cord. Unfortunately, there is no digital output.
The digital-to-analog converter based on two 14-bit TDA1540 chips. It is claimed that oversampling compensates for the loss of bits.
The player arrived non-functional. After some re-soldering, it worked. Just in case, I replaced the infamous blue Philips axial capacitors and the transistors on the tray control board. I'm not sure the player is working properly, but I have no complaints. It struggles with reading a test disc, as it behaves randomly after track 30, but if you play tracks sequentially without switching, everything is perfect.
The no-name CD-R I accidentally bought was showing mess on some tracks, but thanks to NTTY and Vintage02 I was able to take measurements from the "factory" disc.
My setup: Philips CD204 (Test CD) --> MiniDSP PocketADC (coax) --> DIR9001 (i2s) --> SA9227 (usb) --> Win11 --> REW
Measurements (Analog out, stock cable)
999.91Hz sine @0dBFS (without and with dither)
0dbfs / -1dbfs / -3dbfs / -6dbfs (without dither)
0dbfs (L+R) / -1dbfs / -3dbfs (L+R) / -6dbfs (with shape dither)
Multitone
IMD AES Analog
18kHz and 20kHz, -3.02dB
Pitch error and jitter test
Oversampling filter response test
3DC measurement
Unfortunately, I don't know what's going on here.
Thank you for your attention!
Last edited:
