HP LaserJet 4 Service Manual - Page 294
DC Controller PCA Layout-LaserJet 4/4M, Number, Table 7-36
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5 J203 6 1 J202 3 1 VR202 1 7 18 J204 J206 12 1 1 J205 J201 J207 26 25 1 J208 3 1 J213 4 1 J209 3 13 CP202 1 J212 1 3 TB201 6 J211 10 4 1 CP201 J210 1 Figure 7-16 DC Controller PCA Layout-LaserJet 4/4M Table 7-36 Number Part J201 Paper Control PCA J205 Scanner/Beam Detect J206 Laser Drive PCA J207 Formatter PCA J208 Deliver/Exit Sensor PS3 J210 Interconnect PCA J209 Cooling Fan J211 Main Motor J212 Power Supply/Fuser Drive VR202 Registration Adjustment TB201 DC Voltages (from Power Supply) 7-64 Troubleshooting
5
VR202
J206
J203
J204
J205
6
1
1
8
1
1
7
1
2
1
3
1
J202
J201
13
1
3
J212
CP202
1
6
TB201
CP201
J211
4
1
10
1
J210
3
1
J209
4
1
3
1
25
26
J213
J208
J207
Figure 7-16
DC Controller PCA Layout—LaserJet 4/4M
Number
Part
J201
Paper Control PCA
J205
Scanner/Beam Detect
J206
Laser Drive PCA
J207
Formatter PCA
J208
Deliver/Exit Sensor PS3
J210
Interconnect PCA
J209
Cooling Fan
J211
Main Motor
J212
Power Supply/Fuser Drive
VR202
Registration Adjustment
TB201
DC Voltages (from Power Supply)
Table 7-36
7-64 Troubleshooting