II-15
1.3.5
Optional RAM
<HL-720>
Three 4M-bit DRAM (x 8 bits) and one 16M-bit DRAM (x 8 bits) are used as the
optional RAM. The total memory area is expanded up to 4 Mbytes.
Fig. 2.12
<HL-730/730Plus>
There are two types of optional RAMs: the 1 Mbyte model and the 1.5 Mbytes
model for HL-730, and one type of optional RAM: the 1Mbyte model for HL-
730Plus. The memory capacity can be expanded up to 2 Mbytes for both HL-730
and HL-730Plus.
HL-730 (0.5 M model):
+ 1 M optional RAM = 1.5 Mbytes
+ 1.5 M optional RAM = 2 Mbytes
HL-730Plus (1 M model)
+ 1 M optional RAM = 2 Mbytes
Fig. 2.13
Содержание HL-720
Страница 1: ...SERVICE MANUAL MODEL HL 720 730 730Plus R LASER PRINTER ...
Страница 36: ...II 19 1 3 10 Engine I O HL 720 Fig 2 21 shows the engine interface circuit Fig 2 21 ...
Страница 37: ...II 20 HL 730 730Plus Fig 2 22 shows the engine interface circuit Fig 2 22 ...
Страница 61: ... Fig 3 18 2 4 1 1 1 ...
Страница 92: ...SERVICE MANUAL MODEL HL 760 R LASER PRINTER ...
Страница 109: ...II 8 1 3 4 DRAM Two 4M bit DRAMs x 16bits are used as the RAM Fig 2 6 ...
Страница 113: ...II 12 1 3 10 Engine I O Fig 2 12 shows the engine interface circuit Fig 2 12 ...
Страница 114: ...II 13 1 3 11 Paper Feed Motor Drive Circuit Fig 2 13 ...
Страница 133: ...Appendix 2 Main PCB Circuit Diagram 1 3 CODE UK3227000 B48K272CIR 1 3 NAME ...
Страница 134: ...Appendix 3 Main PCB Circuit Diagram 2 3 CODE UK3227000 B48K272CIR 2 3 NAME ...
Страница 135: ...CODE UK3227000 B48K272CIR 3 3 NAME Appendix 4 Main PCB Circuit Diagram 3 3 ...