HP LaserJet Pro 300 Service Manual - Page 145
FSR diagram,
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FSR diagram Figure 2-15 FSR diagram 7 6 5 4 3 2 +3.3VD 1 R866 3.3K,0.063W 2 +3.3VD R836 4.7K,0.063W 1 2 (A505) 1 R832 4.7K,0.063W R833 4.3K,0.063W 2 1 2 1 R831 2.2K,0.1W 1 2 R830 4.7K,0.063W +3.3VD +3.3VD 1 2 C871 0.1U,25V/NOTMNT 12 8 R834 3 V 1 8.2K,0.063W 2 IC831 4 LM393EDT 2 R837 1 2 150,0.063W 12 C832 0.1U,25V/NOTMNT JP5 RK73Z1JT/NOTMNT 1 2 2 1 +3.3VD R841 6.8K,0.063W 1 +3.3VA 1 2 J157 1 J2P J157 2 J2P R843 4.7K,0.1W +3.3VD 12 R842 2K,0.063W C844 2 0.1U,25V/NOTMNT C843 0.01U,50V 12 R844 1 2 1K,0.1W SUB2TH (CPU-36p) 12 R845 1 2 10K,0.063W C842 0.1U,25V 1 SUPRT DA821 RB558W@ 3 2 1 2 JP2 RK73Z1ET/NOTMNT JNT801 1 2J 3 1 2 Q831 RT1N436M-@111 3 C831 47U,35V 1 12 +3.3VD 1 2 +3.3VD R867 3.3K,0.063W C841 0.1U,25V 12 8 6 V 7 5 IC841 4 LM393EDT 2 DA841 RB558W@ 3 1 2 JP4 RK73Z1ET/NOTMNT JNT802 1 2J 3 2 R852 4.7K,0.063W R853 4.3K,0.063W 2 1 2 1 R856 1 2 1 4.7K,0.1W R850 4.7K,0.1W 2 R851 1 2 2.2K,0.1W C872 0.1U,25V/NOTMNT 12 C852 0.1U,25V/NOTMNT JP3 12 2 +3.3VD +3.3VD 1 4 IC841 8 2 LM393EDT V 1 3 2 R854 8.2K,0.063W 1 2 R857 150,0.063W 12 Q851 RT1N436M-@111 3 C851 47U,35V 1 1 RK73Z1JT/NOTMNT +3.3VA +3.3VB +3.3VD FSRRLD1 (A505) 1 R870 2 10K,0.1W JNT803 1 2J R864 2 1 3 3.3K,0.1W 3 R865 2 1 4.7K,0.1W 1 2 R868 2 1 Q861 10K,0.1W 2SC2712-Y(F) 3 R869 2 1 10K,0.1W 1 2 Q862 2SC2712-Y(F) +3.3VD 1 R860 750,0.1W 2 1 R862 750,0.1W 2 JNT5 1 2J 3 FSRRLD2 (A505) R863 1 2 3.3K,0.1W 3 R861 1 2 4.7K,0.1W 1 2 Q863 2SC3624-@-A 2 2 JP6 RK73Z1JT/NOTMNT 1 JP7 1 RK73Z1JT +3.3VD CP100 1 check 1 F E D C B 6: FSR A CD1-8 ENWW Tools for troubleshooting 121