4826 Sterling Drive, Boulder, CO 80301 PH: 720.406.8946 FX: 720.406.8967
Remote Control Issues
1. Remote not Functioning
a. Replace the batteries in the Remote Control.
b. Replace the Remote Control.
c. Replace the Display PCA.
Fan Issues
1. Fans
won’t
turn.
a. Verify the fans are correctly plugged into the small fan interconnect PCA.
b. Carefully replace Q6 on the Regulator PCA. MFG PN: BC3376G (TO92).
i.
Replace the Q6 Heat Sink using thermal compound.
2. Fans won’t stop after Power Up
a.
Check to make sure that all connections to the Main PCA are good.
b.
Verify that the correct fan driver transistor Q6 is installed.
i.
For units with one large and one small fan Q6 should be a
BC337G and that it is installed up-side-down compared to the
silk screen on the Main PCA
Repairing the Regulator PCB Assembly (advanced)
1. For qualified technicians who wish to repair the regulator PCB Assembly on the
component level, most situations will require replacing the following components. We
recommend that all of these parts be replaced at once:
a. Q11,
Q14
(MMBTA56)
b. Q12,
Q13
(MMBTA06)
c. R43, R44 (10 ohms)
d. R39, R40 (47 ohms)
e. D13, D14 (BAV99)
f. R11-R14 (0.12 ohm 5W) (Original boards use 0.05 ohm. When repairing boards,
replace all 4 resistors with 0.12 ohm)
2. All of the above parts are available in a repair kit. (See parts list)