No Focus Lens Operation - Hitachi VM-H675LA Service Manual

(2) NO FOCUS LENS OPERATION

No
Does zoom operate See " (1) NO ZOOM AND
normally FOCUS OPERATION".
Yes
No
Is manual focus provided 1
Yes
Can switching be done
No
Check the focus
between manual focus
switches.
and autofocus
Yes
• Focus switch faulty
NG
• R1179 faulty
IC1104-92: PULSE
• R1186 faulty
• C1118 faulty
OK
• Focus switch faulty
NG
• R1178 faulty
IC1104-93: PULSE
• R1185 faulty
• C1117 faulty
OK
1
Note: Check the items marked
focus FAR and NEAR switches alternately.
NG
TL1312: PULSE 2
Note: Check the items marked
OK
OK
TL1313-TL1316: PULSES Lens block faulty
3
NG
Focus switches faulty
OK
by pressing the manual
by turned power ON.
3
NG
IC1301-3: 3V Check the 3V line.
OK
NG
IC1301-4, 11, 23: 5V
Check the 5V line.
OK
• C1302 faulty
NG
TL1325: 12V • C1303 faulty
• C1304 faulty
OK
NG
IC1104 faulty
IC1301-12, 14: PULSES
OK
NG
IC1301-13, 15: PULSES IC1104 faulty
OK
Note: Check the items marked
IC1301 faulty
Check the connections
of the lens flat cable.
TL1317: 3V
TL1311: PULSE
Lens block faulty
Note: Check the items marked
by turned power ON.
2
NG
Connect the connections
of the lens flat cable.
OK
NG
Check the 3V line.
OK
• R1316 faulty
NG
• Q1301 faulty
• IC1104 faulty
OK
by turned power ON.